JP2003165381A - Load displacement detection system for onboard cargo - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an excellent load displacement detection system for cargo capable of eliminating the troublesomeness of operation, preventing the strength of fixing members from being lowered, and eliminating the need of confirmation of safety in use. <P>SOLUTION: This load displacement detection system comprises a movement detection part 15 installed on a deck 11C and detecting the movement amount of an on-vehicle cargo 12 fixed by fixing means 13A and 13B. The movement detection part 15 comprises a movement amount detection sensor 15-1 detecting the movement amount of the fixed point of the on-vehicle cargo 12 due to load displacement, a processing circuit 15-2 for outputting alarm signals when the detected signals of the movement amount detection sensor 15-1 are inputted and detected signal values are equal to or more than specified values, and an alarm part 20 allowing the alarm signals from the processing circuit 15-2 to be inputted therein and emitting alarms. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-board luggage load deviation detection system, and more particularly, to detecting a load deviation on a vehicle bed during transportation to safely drive a vehicle loaded with cargo and at the same time, load deviation. It relates to a load deviation detection system that prevents the vehicle from falling or the cargo falling based on the above.

[0002]

2. Description of the Related Art Generally, in a freight vehicle, large cargo and heavy cargo are fixed (latched) to a cargo bed by using fixing members such as wires, ropes and bolts. When transported in this secured state, the cargo or cargo bed is loosened due to vibration or shock received during transportation, and the cargo originally supposed to be securely fixed to the cargo bed starts to move and shake. . further,
Depending on driving conditions such as unevenness on the road surface and sharp curves, luggage may fall or drop from the cargo bed.

As a method of coping with the occurrence of this accident, in terms of work, a freight vehicle is stopped at regular time intervals while the vehicle is running, and the cargo is secured to the operator (in most cases, the driver of the freight vehicle). ) To confirm. Then, if looseness has occurred in the lashing state, it is general to lash again.

In addition to this general method, for example, when a large cargo or the like is fastened to a cargo bed with wires or ropes, the tension of the wires or ropes is measured with a tensiometer. , A method of detecting the amount of looseness from the difference between the initial value and the current value is used. For example, when a large cargo or the like is fastened to the bed using bolts, fixing jigs, etc., the amount of stress strain of external force applied to the bolts, fixing jigs, etc. is measured with a strain gauge, and the initial value and A method of detecting the amount of looseness from the difference in value is used.

Further, in Japanese Utility Model Laid-Open No. Sho 64-00192, a tension change of a rope fixing a load is calculated, and the tension change is compared with a slack reference value and exceeds a slack reference value. When it is determined that an alarm is issued, a device that prevents a load collapse is proposed.

Further, Japanese Unexamined Patent Publication No. 2001-97072 proposes a safe traveling system for preventing the collapse of cargo loaded on a truck. This safe traveling system is composed of a plurality of load sensors arranged at each of the longitudinal and lateral ends of at least the traveling direction of the truck bed, and the load distribution of the truck from the detected load signals. A platform load measuring means for calculating a total load, a load distribution of the platform from the platform load measuring means, and a plane center of gravity in a plane including the longitudinal direction along the traveling direction of the entire platform from the total load and its lateral direction. The load balance is calculated, and the changes in the plane center of gravity and the load balance are detected while the truck is running.When it is detected that the changes in the plane center of gravity and the load balance exceed the predetermined value without changing the total load, the load is And a traveling management means for outputting the information of the collapse as a sound or a display.

[0007]

However, while the conventional general running is carried out, the lorry vehicle is stopped at regular time intervals, and the operator confirms the lashing state of the cargo, and the lashing state is loose. In such a case, there is a problem in that the method of re-securing is extremely troublesome for the operator and depends on the intuition of the operator.

In addition, the method using a strain gauge and the actual method 6
In the method described in Japanese Patent No. 192, 1992, since the measuring unit and the detector are connected to a fixing member such as a fixing jig or a functional unit for fixing a large cargo of the fixing member, the fixing member originally mounted firmly. As a result of mounting the measuring unit and the detector, etc., the strength is reduced, and it is necessary to confirm safety before use. That is, in order to detect the tension of the wire, it is necessary to provide a tensiometer between the wires. There is a problem in that the so-called potential risk factor such as the tension meter itself breaking and the wire coming off, and the function of fixing the cargo by the wire is no longer useful, is higher than when the cargo is fixed only by the wire. Also, the same problem occurs when using bolts and fixing jigs.

Further, in the safe traveling system for a truck described in Japanese Patent Laid-Open No. 2001-97072, in order to measure the change in the total load of the truck bed and the change in the load balance, ordinary lashing equipment or the like is not sufficient. It was necessary to install special equipment. Therefore, it goes without saying that the cost is high, but there is a problem that it is very troublesome to install special equipment.

The present invention has been made in order to solve the problems of the prior art, does not rely on the troublesome work of an operator, does not reduce the strength of a fixed member to be firmly bound, and It is an object of the present invention to provide an excellent cargo load deviation detection system by simply adding a simple device to the equipment for ordinary lashing without the need to confirm safety during use.

[0011]

In order to achieve the above-mentioned object, the structure of the load deviation detection system for an on-vehicle baggage according to the present invention detects a movement amount of an on-board baggage provided on a cargo bed and secured by a securing means. And a movement detection unit that
A movement amount detection sensor that detects a movement amount of a fixed point of the on-vehicle luggage due to a displacement of the on-vehicle luggage and a detection signal of the movement amount detection sensor are input, and an alarm is issued when the detection signal value is a predetermined value or more. It is characterized by comprising a processing circuit which outputs a signal, and having an alarm unit which inputs an alarm signal from the processing circuit and issues an alarm. Another configuration of the load deviation detection system for vehicle-mounted luggage according to the present invention includes a movement detection unit that is provided on the luggage carrier and detects a movement amount of a lashing unit that lashes the vehicle-mounted luggage, and the movement detection unit includes: A movement amount detection sensor for detecting the movement amount of the fixed point of the securing means, and a processing circuit which inputs a detection signal of the movement amount detection sensor and outputs an alarm signal when the detection signal value is equal to or more than a predetermined value. And an alarm unit for issuing an alarm when the alarm signal from the processing circuit is input. Yet another configuration of the in-vehicle baggage load deviation detection system according to the present invention is the above-described in-vehicle baggage load deviation detection system, wherein the movement amount detection sensor fixes the fixed point of the in-vehicle baggage or the securing means. A winding drum that has one end connected to one of the points and that winds a detection wire whose length varies based on the amount of movement of the fixed point, and a varying length of the detection wire that is provided on the winding drum. It is characterized by comprising a digitizing device for digitizing. Still another configuration of the in-vehicle luggage load deviation detection system according to the present invention is the in-vehicle luggage load deviation detection system according to any one of the above items, wherein the movement detection unit is provided with wireless means for transmitting an alarm signal. The alarm unit is provided with a receiving unit that receives a wireless signal transmitted from the wireless unit. Still another configuration of the load deviation detection system for vehicle-mounted luggage according to the present invention is the load deviation detection system for vehicle-mounted luggage according to any one of the above, which displays the movement amount of the detected fixed point. The display unit is provided in either the movement detection unit or the alarm unit.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A truck load deviation detection system according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is an explanatory view of a truck equipped with a truck load deviation detection system according to the present invention, FIG. 2 is a configuration diagram of the cargo deviation detection system in FIG. 1, and FIG. 3 is a linear diagram in the load deviation detection system in FIG. FIG. 4 is an explanatory diagram of the principle of the expression scale, and FIG. 4 is an explanatory diagram of a signal processing circuit in the load deviation detection system of FIG.

In FIG. 1, FIG. 1 (a) is a functional explanatory diagram when the load deviation detection system for a truck according to the present invention is mounted on an in-car luggage of a truck, and FIG. 1 (b) is a truck for the present invention. FIG. 7 is an explanatory diagram when a vehicle-mounted luggage moves in the load deviation detection system of FIG. As shown in FIG. 1 (a), a truck 11 includes a chassis 11 </ b> A provided with wheels (reference numerals are not shown and rear wheels are not shown), and a driver's cab provided on an upper front portion of the chassis 11 </ b> A. 11B and the chassis 11A
It is composed of a loading platform 11C provided on the upper side and a plurality of hooks 11D provided on the outside of the loading platform 11C. An on-vehicle luggage 12 is placed on the cargo bed 11C, and the on-vehicle luggage 12 is loaded with ropes 13A, 1A on the cargo bed 11C.
3B is hooked and fastened to the plurality of hooks 11D. On the cargo bed 11C at a predetermined position on the front side (the driver's cab 11B side of the truck 11) of the on-vehicle luggage 12 secured by the luggage ropes 13A and 13B, the on-vehicle luggage 12 caused by the rocking of the truck 11 or the like. The load shift detection system 50 for detecting the load shift is fixed by an appropriate method.

The load gap detection system 50 is used for the on-vehicle luggage 12.
The measurement wire 14 pulled out from the load deviation detection system 50 connected to a predetermined fixed point on the front side of the vehicle and the measurement wire 14 connected to the measurement wire 14 and the movement amount of the fixed point of the in-vehicle luggage 12 is detected. A movement amount detector 15 which transmits a wireless output when the detected movement amount is larger than a predetermined value,
The alarm unit 20 receives a wireless output from the movement amount detector 15 and issues an alarm.

As shown in FIG. 2, the movement amount detector 15 includes
A hook-shaped member provided so as to project forward from a fixed point (not shown) on the front surface side of the in-vehicle luggage 12, that is, a hook 12-1
And a measuring wire 14 for connecting the wheel material 14-1 provided at the tip
And a movement amount detection sensor 15 that is connected to the other end of the measurement wire 14 and outputs an output signal proportional to the movement amount of the measurement wire 14 based on the movement of the fixed point of the in-vehicle luggage 12.
-1 and the output of the movement amount detection sensor 15-1 are received,
Measuring wire 1 set with the movement amount of the measuring wire 14
4 is compared with the threshold value of the movement amount, and when the movement amount of the measuring wire 14 is equal to or larger than the threshold value, the signal processing circuit 15-2 that outputs a load deviation abnormality signal and the load deviation abnormality signal A wireless unit 15-3 that inputs and outputs a wireless alarm to the alarm unit 20 arranged in the driver's cab 11B of the truck, a power source 15-4 that supplies electric power to each of these units, and a rectangular casing that houses each unit. It is composed of the body 15-6. The power supply 15-4 is composed of four AA batteries and is inserted into the signal processing circuit 15-2. In this embodiment, a case where a wire type linear scale is used as the movement amount detection sensor 15-1 will be described.

Although the wire type linear scale 15-1 is not shown in detail, the wire type linear scale 15-
15-1 for housing each member of No. 1 rotating shaft 15-1 which is rotatably supported by bearings provided on both inner side surfaces of the housing 15-6.
a wire reel 15-1a having b, a leaf spring delivery pulley 15-1d provided coaxially with the wire reel 15-1a, the rotary shaft 15-1b and a predetermined distance, and It is configured to rotate about a rotary shaft 15-1e parallel to the rotary shaft 15-1b and to be a leaf spring winding pulley 15-1f. Here, the leaf spring feeding pulley 15-1d and the leaf spring winding pulley 15-
A leaf spring 15-1c is wound between 1f and extends from the delivery pulley 15-1d to the leaf spring take-up pulley 15-.
It moves in the direction of 1f with a constant tension applied.

The winding start of the measuring wire 14 is fixed to the wire reel 15-1a by a round crimp terminal (not shown). The measurement wire 14 is used a plurality of times (on-vehicle luggage 12
(Determined in accordance with the connecting length of the wire) and the winding end of the measuring wire 14 is extended to connect with the hook 12-1 provided at the fixed point of the on-vehicle luggage 12.
A ring member 14-1 for connecting to the hook 12-1 is provided at the tip of the extending measurement wire 14.

The leaf spring feeding pulley 15-1d is provided coaxially with the wire reel 15-1a, and the leaf spring 15-1d.
The winding start of c is fixed by a round crimp terminal (not shown). The leaf spring 15-1c is wound around the leaf spring delivery pulley 15-1d in a reverse winding to the winding of the measuring wire 14 multiple times. That is, when the measurement wire 14 is wound around the wire reel 15-1a by the movement of the fixed point of the in-vehicle luggage 12, the leaf spring 15-1c is unwound. The number of times the measuring wire 14 is wound is determined according to the change in the length of the measuring wire 14 due to the movement of the fixed point of the in-vehicle luggage 12.

The unwinding end of the leaf spring 15-1c extends to the leaf spring take-up pulley 15-1f, and the unwinding end is fixed to the leaf spring take-up pulley 15-1f by an appropriate means. Leaf spring 15 in spring delivery pulley 15-1d
It is wound in the reverse winding of -1c. That is, the leaf spring 15-1c is wound around the leaf spring delivery pulley 15-1d and the leaf spring take-up pulley 15-1f in a S-shape by applying a constant tension by itself. The leaf spring 15-1c winds up the leaf spring 15-1c by its elastic energy, and at the same time, the wire reel 15
Tension is applied to the measurement wire 14 via -1a so that slack does not occur between the measurement wire 14 and the fixed point of the in-vehicle luggage 12.

Here, in the wire type linear 15-1, if the so-called measurement wire 14 is not prevented from being completely ejected, the wire type linear 15-1 will be damaged. Therefore, the spherical member 1 formed of an elastic material is provided on the housing 15 side of the wheel material 14-1 provided at the tip of the measurement wire 14.
4-5 are provided, the diameter of which is the measuring wire 14 of the housing 15.
Larger than the pull-out diameter of. As a result, even if the measuring wire 14 is released, the spherical member 14-5 stops at the outlet of the measuring wire 14 and the measuring wire 1
4 is prevented from sticking out.

Although not shown, the wire reel 15-
In 1a, a photoelectric rotary encoder is provided on the opposite side of the leaf spring feeding pulley 15-1d of the rotary shaft 15-1b, and the photoelectric rotary encoder rotates in accordance with the variation of the length of the measuring wire 14. To output the output signal. By subjecting this output signal to digital processing, an output signal corresponding to fluctuations in the length of the measuring wire 14, for example, 5 pulses / mm can be obtained.

Now, referring to FIG. 4, the signal processing circuit 1
5-2 will be described. As illustrated, the signal processing circuit 15-2 stores the initial input signal of the wire-type linear scale 15-1 and the processing procedure program in the signal processing circuit 15-2.
A storage unit 15-2b including an AM and the like, a setting unit 15-2c for setting a threshold value of the moving amount of the measuring wire 14, and a pulse signal input from the wire type linear scale 15-1 are measured by the measuring wire 14. A processing circuit unit 15-2a composed of an MPU or the like that counts the movement amount, compares the count value with a threshold value of the movement amount of the measuring wire 14, and outputs an abnormality detection signal when an abnormality occurs, and the processing circuit unit 15-2a. The abnormality detection signal is input from 15-2a, and the wireless signal is transmitted to the driver's cab 11 of the truck.
The wireless transmission unit 15 to output to the alarm unit 20 arranged in B
-3.

Further, the setting section 15-2c can set not only the movement amount threshold value of the measuring wire 14 but also the angle θ with the horizontal plane when the measuring wire 14 is skewed. The processing circuit section 15-2a uses cos θ as a coefficient when the movement amount of the measurement wire 14 is converted into a digit. In the present embodiment, the coefficient cos θ is not used because the measuring wire 14 is not skewed, but this will be described in a modified example described later. The processing circuit section 15
It is preferable to provide a display unit 15-5 for outputting the count value at −2a and displaying the output value in the movement amount detector 15.

For the wireless transmission unit 15-3 and the alarm unit 20, for example, a pair of wireless security sensors are used. The wireless transmission unit 15-3 is housed in the housing 15 of the movement amount detector 15, and is configured to input an abnormality detection signal from the processing circuit unit 15-2a and output a wireless signal. The alarm unit 20 is housed in a dedicated housing and is mounted in the driver's cab 11B of the truck by appropriate means (not shown). The alarm unit 20 is powered on only when an abnormality is detected.

The operation of the load deviation detecting system having the above structure will be described with reference to FIGS. 1 to 4. The loading ropes 13A and 13B are wound around the outside of the on-vehicle luggage 12 loaded on the loading platform 11C of the truck 11, and both ends thereof are hooked by the pair of hooks 11D. Wire type linear scale 15-
The ring material 14-1 of the measurement wire 14 of No. 1 and the hook 12-1 provided at the fixed point on the front surface side of the in-vehicle luggage 12 are hooked and connected. At this time, the measurement wire 14 is given a certain tension by the leaf spring 15-1c in the wire type linear scale 15-1 via the wire reel 15-1a, is wound around the wire reel 15-1a, and is loosened. There is no state.

Here, four AA batteries are connected to the signal processing circuit 1.
The power source 15-4 is configured by inserting the power source 15-4. Then, the setting unit 15-2c sets a threshold value of the movement amount of the measuring wire 14. For example, a 10-ton vehicle with a load weight of about 950
It is 5 mm in Kg. The photoelectric rotary encoder provided coaxially with the rotation axis of the wire reel 15-1a does not output a signal because the measuring wire 14 does not change. The signal processing circuit 15-2 stores this state in the storage unit 15-2b as an initial value of the measuring wire. In this state, the load deviation detection system 50 is ready for detection.

Here, as shown in FIG. 1B, it is assumed that the on-vehicle luggage 12 has moved from the position shown by the solid line in the figure to the position shown by the dotted line in the figure. In the wire reel 15-1a, the leaf spring 15-1c rotates the leaf spring take-up pulley 15-1f having the rotating shaft 15-1e in the clockwise direction by its elastic force and winds itself, and at the same time, the leaf spring is delivered to the pulley. The leaf spring 15-1c is unwound from 15-1d in the counterclockwise direction. By this rewinding, the wire reel 15-1a rotates counterclockwise because it is coaxial with the rotation shaft 15-1b of the leaf spring delivery pulley 15-1d, and is generated by the movement of the on-vehicle luggage 12. The change in the length of the measuring wire 14 is taken up. At the same time, the rotary shaft 15 of the leaf spring delivery pulley 15-1d
The photoelectric rotary encoder coaxial with -1b also rotates and outputs an electric signal proportional to the change in the length of the measuring wire 14, for example, 5 pulses / mm.

Output signal from the photoelectric rotary encoder of the wire reel 15-1a, for example, 5 pulses / mm
In the received signal processing circuit 15-2, the processing circuit unit 15-2a digitizes the pulse signal. The movement value of the in-vehicle luggage 12 is calculated from this count value and the initial value of the measurement wire stored in the storage unit 15-2b.

The calculated moving value is output to and displayed on the display unit 15-5, and the moving value and the storage unit 15-2 are used.
It is determined whether the movement value of the measurement wire 14 is abnormal by comparing it with the threshold value of the movement amount of the measurement wire 14 stored in b. If it is determined to be abnormal, an abnormal signal is output to the wireless transmission unit 15-3. The wireless transmission unit 15-3 receiving this output signal outputs a wireless signal to the alarm unit 20. These processes are performed according to the processing program stored in the storage unit 15-2b. The alarm unit 20 arranged in the driver's cab 11B, to which the wireless signal from the wireless transmission unit 15-3 is input, issues a load collapse warning signal to make the driver aware of the load collapse, and the driver inspects the baggage, You will have to re-secure and re-fix your luggage.

In the present embodiment, the case where the wire type linear scale is used as the movement amount detecting sensor 15-1 has been described, but another type having the same function may be used. In addition, although the case where the display 15-6 is provided in the movement amount detector 15 has been described in the present embodiment,
It may be provided in the cab 11B.

Next, a modified example of the load deviation detection system according to the embodiment of the present invention will be described. [Embodiment 1] In the first embodiment, a fixed point is provided on the front surface of the on-vehicle luggage 12 secured on the cargo bed 11C, and the hook 12-1 provided at the fixed point and the measurement wire 14 of the load deviation detection system are provided. Wired linear scale 15-1
Although the amount of movement of the in-vehicle luggage 12 is detected by the above, the present invention is not limited to this, and various modifications can be considered.

With reference to FIG. 5, a modified example of the truck load deviation detection system according to the present invention will be described. FIG. 5 is an explanatory view of a truck equipped with a modified example of the load deviation detection system for a truck according to the present invention, and FIG. 5A is a modified example of the load deviation detection system for a truck according to the present invention. 5 (b) is a functional explanatory diagram when mounted on the vehicle, FIG. 5 (b) is a functional explanatory diagram in the case where an on-vehicle luggage is displaced in the truck load deviation detection system according to the present invention.
FIG. 4 is a rear view for explaining the load deviation detection system for a truck according to the present invention.

As shown in FIG. 5 (a), the configuration of the movement amount detector 15, the alarm unit 20 and the like is almost the same as that of [Embodiment 1] of FIG. 1, and the measurement wires are attached to the loading ropes 13A and 13B. Since the structures of the parts for locking 14-1, 14-5 and the like and the installation method of the movement amount detector 15 are different, this difference will be mainly described. In FIG. 5, members having the same functions and specifications as those of FIG. 1 will be described using the same reference numerals.

As shown in FIG. 5A, both ends of the first measuring wire 14-1 are tightly bound to the predetermined positions K1 and K2 of the loading ropes 13A and 13B that fasten the on-vehicle luggage 12. Then, the first measuring wire 14-1 is placed between the predetermined positions K1 and K2 and the loading ropes 13A and 13A are attached.
It is stretched so as to be orthogonal to B. In this case, the connection positions K1 and K2, which are tightly bound, do not move even if the loading ropes 13A and 13B move due to a load shift. The tension of the first measuring wire 14-1 depends on the tension of the loading ropes 13A, 1A.
It is assumed that there is no effect on the tied state of 3B.

As shown in FIG. 5 (a), the loading rope 1
First measurement wire 14 stretched between 3A and 13B
-1 is connected to one end of a second measuring wire 14-2, which is obliquely inclined downward from the middle point, and the other end of the second measuring wire 14-2 is a movement detector. It is connected to a 15-wire linear scale 15-1. Here, FIG.
As shown in (a) and (c), the angle formed between the horizontal plane and the second measurement wire 14-2 that is substantially parallel to the vertical plane with respect to the on-vehicle luggage 12 and the platform 11C including the midpoint and is inclined. Let be θ.

In the initial state where there is no load shift, the first measuring wire 14-1 is stretched so that there is no slack in the left and right, and the second measuring wire 14-2 is loose at the midpoint. The second measuring wire 14 is arranged so as to be oblique so that it does not exist.
-2 is wound around the wire reel 15-1a of the wire type linear scale 15-1. By this winding, the optical rotary encoder coaxial with the wire reel 15-1a outputs an output signal, and the load rope 13
The signal processing circuit 15 is used as an initial value indicating the positions of A and 13B.
-2 in the storage unit 15-2b.

As shown in FIG. 5B, when the load shift occurs, the first measuring wire 14-1 becomes loose. In order to compare the case where there is no load shift and the case where there is load shift, the first measurement wire 14-1 in the case where there is no load shift is shown by the dotted line,
The first measurement wire 14-1 when there is a load shift is shown by a solid line. The loosened first measurement wire 14-1 is pulled toward the movement amount detector 15 by the second measurement wire 14-2.

By the pulling, the looseness of the first measuring wire 14-1 caused by the load shift is taken as a change in the length of the second measuring wire 14-2, and the second measuring wire 14- 2 is a leaf spring feeding pulley 15-1d provided in the wire type linear scale 15-1 and a leaf spring 1
5-1c, is wound by the leaf spring winding pulley 15-1f. This change in the wound length is detected by the photoelectric rotary encoder coaxial with the leaf spring feeding pulley 15-1d. In this case, as described above, the second measuring wire 14-2 processes the output pulse of the photoelectric rotary encoder, for example, 5 pulses / mm by the signal processing circuit 15-2, and the change l in length is calculated. Since this l is a change in the length of the second measuring wire 14-2 that is skewed, the moving distance of the in-vehicle luggage 12 is θ set in the setting unit 15-2C and the processing circuit unit 15-. Coefficient by 2a cos
It becomes lcos θ from θ. Processing and alarms are issued in the same manner as in [Embodiment 1] below.

With reference to FIG. 6, another modified example of the truck load deviation detection system according to the present invention will be described. Figure 6
It is explanatory drawing of the truck which mounted the other modified example of the load gap detection system of the truck which concerns on this invention.

As shown in FIG. 6, the embodiment of FIG.
1] is substantially the same as the movement amount detector 15 and the alarm unit 20 that compose the load deviation detection system 50, and the measurement wire 14 is hooked on the in-vehicle luggage 12 and the movement amount detector 1
Since the connection method is different from that of No. 5, this difference will be mainly described. In FIG. 6, members having the same functions and specifications as those of FIG. 1 will be described using the same reference numerals.

As shown in FIG. 6, an on-vehicle baggage 12, for example, a cable drum 12 is hooked on a cargo bed 11C via roots 12-3 and 12-4, and a plurality of hooks 11D are hooked by a plurality of ropes 13A and 13B. Have been tied up. The load shift detection system 50 interposes a load pillow 50-1 on the load platform 11C at a predetermined position on the front side (the driver's cab 11B side of the truck) of the cable drum 12 secured by the load ropes 13A and 13B. It is fixed by an appropriate method.

A ring member 14-1 at the tip of the measuring wire 14 pulled out obliquely upward from the load deviation detection system 50,
A hook-shaped member, that is, a hook 12-1 that is obliquely pulled out from a fixed point on the front surface side of the cable drum 12 is connected. Initially, when the cable drum 12 is fixed and is not moved, the measurement wire 14 is the wire reel 15 of the wire type linear scale 15-1 of the movement detector 15.
It is wound up to -1a. By being wound up,
An optical rotary encoder coaxial with the wire reel 15-1a outputs an output signal. This output value is used as the initial value of the position of the cable drum 12 and the movement detector 1
The storage unit 15-2b of the signal processing circuit 15-2 of No. 5 is stored.

When the cable drum 12 moves, the measuring wire 14 is loosened, and the looseness changes the length of the wire reel 15-1a. The optical reel encoder is coaxial with the wire reel 15-1a. Outputs an output signal. From this output value, the cable drum 12
In order to calculate the position change value of, the optical rotary encoder first processes the output signal, for example, 5 pulses / mm by the signal processing circuit 15-2, and changes the length l of the measuring wire 14. Is calculated.

Here, as shown in FIG. 6, the cable drum 12 including the fixing points of the cable drum 12 and the loading platform 1 are provided.
The angle between the horizontal plane and the measuring wire 14 which is substantially parallel to the vertical plane with respect to 1C and is oblique is denoted by θ. As described above, l is the change in the length of the obliquely moving measuring wire 14, so that the actual movement distance of the cable drum 12 is θ set by the setting unit 15-2C and the processing circuit unit. 15-2
It becomes l cos θ from the coefficient cos θ by a. Subsequent processing is the same as in [Embodiment 1].

In the above-described [Embodiment 1] and its modification, the truck load is taken as an example to describe the load deviation detection system for in-vehicle luggage. However, the present invention is not limited to trucks, and is not limited to trucks. It goes without saying that it is applied to large vehicles such as trailers.

[0046]

As described in detail above, according to the configuration of the load deviation detection system for an on-vehicle baggage according to the present invention, the strength of a fixed member to be firmly secured can be increased without depending on the troublesome work of an operator. It is possible to provide an excellent load deviation detection system for in-car luggage without adding a simple device to the equipment for ordinary lashing without lowering the safety and checking safety during use. .

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a truck equipped with a load deviation detection system for a truck according to the present invention.

FIG. 2 is a configuration diagram of the load deviation detection system of FIG.

FIG. 3 is a principle explanatory diagram of a linear scale in the load deviation detection system of FIG.

FIG. 4 is an explanatory diagram of a signal processing circuit in the load deviation detection system of FIG.

FIG. 5 is an explanatory diagram of a truck equipped with a modified example of the load deviation detection system for a truck according to the present invention.

FIG. 6 is an explanatory view of a truck equipped with another modified example of the truck load deviation detection system according to the present invention.

[Explanation of symbols]

11 ... truck, 11A ... chassis, 11B ... cab, 11
C ... luggage carrier, 12 ... vehicle-mounted luggage, 13A, 13B ... luggage rope, 14, 14-1, 14-2 ... measurement wire, 15 ...
Movement detector, 15-1 ... Wire type linear scale, 15
-1a ... Wire reel, 15-2 ... Signal processing circuit, 1
5-2a ... Processing circuit section, 15-3 ... Wireless section, 15-6 ...
Display unit, 20 ... Alarm unit, 50 ... Load gap detection system

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshiaki Inuma             7-2-18 Toyo Stock Exchange, Koto-ku, Tokyo             Within Hitachi Transport System (72) Inventor Masatoshi Ozaki             12 Nakamachi, Muroran City, Hokkaido Nittetsu Hokkaido             Control System Co., Ltd. (72) Inventor Toshio Mizuki             12 Nakamachi, Muroran City, Hokkaido Nittetsu Hokkaido             Control System Co., Ltd.

Claims (5)

[Claims] 1. A movement detection unit provided on a cargo bed for detecting a movement amount of an on-vehicle luggage fixed by a fastening means, wherein the movement detection unit fixes the on-vehicle luggage due to a load shift of the on-vehicle luggage. And a processing circuit for inputting a detection signal of the movement amount detection sensor and outputting an alarm signal when the detection signal value is equal to or more than a predetermined value. A load deviation detection system for vehicle-mounted luggage, comprising an alarm unit for issuing an alarm when an alarm signal from a circuit is input. 2. A movement detection unit provided on the luggage carrier for detecting the movement amount of the lashing means for lashing the on-vehicle luggage, wherein the movement detection unit detects the movement amount of the fixing point of the lashing means. And a processing circuit that inputs a detection signal of the movement amount detection sensor and outputs a warning signal when the detection signal value is equal to or more than a predetermined value, and the warning signal from the processing circuit is A load deviation detection system for vehicle-mounted luggage, which has an alarm unit that issues an alarm when input. 3. The load deviation detection system for in-vehicle luggage according to claim 1 or 2, wherein the movement amount detection sensor has one end connected to either a fixed point of the in-vehicle luggage or a fixed point of the fastening means. And a winding drum that winds a detection wire whose length varies based on the amount of movement of the fixed point, and a digitizing device that is provided on the winding drum and that digitizes the varying length of the detection wire. A load deviation detection system for in-car luggage, characterized by comprising: 4. The load deviation detection system for vehicle-mounted luggage according to any one of claims 1 to 3, wherein the movement detection unit is provided with a wireless unit for transmitting an alarm signal, and the alarm unit is the wireless unit. A load deviation detection system for vehicle-mounted luggage, comprising a receiving unit for receiving a radio signal transmitted from the vehicle. 5. The load deviation detection system for vehicle-mounted luggage according to any one of claims 1 to 4, wherein a display unit that displays the detected movement amount of the fixed point is the movement detection unit. Alternatively, a load deviation detection system for in-vehicle luggage, which is provided in any of the alarm units.