JP3606849B2 - Large transport vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a large-sized transport vehicle used for transporting scraps and the like loaded on a pallet in a steelworks premises, and more specifically, includes a weighing system that measures the weight of contents loaded in the pallet. It relates to large transport vehicles.
[0002]
[Prior art]
In steelworks or the like, conventionally, when transporting products, materials, or scraps on the premises, a large transport vehicle called a so-called carrier (hereinafter simply referred to as “carrier”) has been used. FIG. 6 is a diagram showing a state of carrying such a carrier. For example, the carrier 100 has a total length exceeding 10 meters and can be loaded with 70 tons. This is provided with a loading platform 101 on which a large transportable object can be loaded, and an appropriate number of traveling devices 102, 102,... Arranged continuously in the front-rear direction are provided below the loading platform 101. Specifically, it is an eight-axis carrier provided with two traveling devices 102, 102... On the left and right and four on the front and rear, and each traveling device 102, 102 has four tires, two on each of the left and right. Is attached.
[0003]
The traveling devices 102, 102... Are provided with a jack-up mechanism using a hydraulic cylinder as a driving means between the traveling devices 102, 102... And the height of the loading platform 101 can be adjusted. As one form of transportation by the carrier 100, transportation using a container structure (hereinafter simply referred to as “pallet”) 80 having a tunnel-type leg called a pallet is performed. In this case, the carrier 100 moves backward with the loading platform 101 lowered, and causes the loading platform 101 to enter under the pallet 80. Then, when it enters the position where it can be stacked, it is stopped and the loading platform 101 is raised, and the contents placed in the pallet 80 are lifted and transported to a predetermined position as shown in FIG.
[0004]
[Problems to be solved by the invention]
By the way, at a steel mill, for example, scrap is collected in a pallet 80, and the scrap is transported to the port together with the pallet 80 by the carrier 100, where it is transshipped to a ship and traded. At that time, since the scrap is converted by the weight, it is necessary to measure the weight of the scrap in the pallet 80. For this reason, a transport vehicle such as a carrier conventionally has a function for measuring the weight of the loaded pallet, but it is calculated from the hydraulic pressure of a hydraulic cylinder provided in the traveling devices 102, 102... Therefore, the accuracy of measuring the contents in the pallet 80 such as scrap was low.
[0005]
On the other hand, examples of the transport vehicle equipped with the weighing system include those described in JP-A-07-324968 and JP-A-2001-259826, in addition to the carrier. Although these can measure the contents of the loading platform relatively accurately, the containers for carrying the goods are integral, so that they could not be applied to the carrier transportation performed at a steelworks or the like. That is, when the carrier uses the pallet 80 at the steelworks to carry the scrap, the pallet 80 containing the scrap is transported to the loading place at the scrap collection place, and on the return, another empty pallet 80 after the scrap is loaded is scrapped. This is because it is returned to the collection place.
[0006]
In addition, since such a transportation form is adopted, it is impossible to weigh the state in which scraps of the same pallet are loaded and the empty state in one transportation. Therefore, in the past, in order to measure the contents of the pallet 80 with a carrier, for example, the pallet 80 is weighed in an empty state in which nothing is contained, and the weight is subtracted from the weight of the pallet 80. To get the weight of the contents. Therefore, two weighings are required, which is very inefficient.
[0007]
Therefore, in order to solve such problems, the present invention has an object to provide a large transport vehicle equipped with a weighing system capable of measuring the weight of contents in one transport even when transported by different pallets. To do.
[0008]
[Means for Solving the Problems]
A large transport vehicle according to the present invention includes a large number of axles, and a cargo bed is supported by a jack-up mechanism provided between the axles, and a pallet placed on the cargo bed is placed on the cargo bed. Lifting device equipped with a weight measuring device for measuring the load weight, an identification device for identifying the pallet placed on the loading platform, and storing the weight for each pallet, measured by the weight measuring device An arithmetic processing unit that calculates the weight of the contents of the pallet from the loaded weight and the pallet weight of the pallet identified by the identification unit, and a weighing operation and a measurement result display for the weighing operation performed by the arithmetic processing unit And a display / operation device for performing the above.
[0009]
Therefore, according to the present invention, the pallet number can be read from the ID data provided for each pallet and the pallet weight can be confirmed from the pre-stored weight data for each pallet. However, the contents can be accurately weighed.
[0010]
In the large transport vehicle of the present invention, the identification device is connected to an antenna disposed at a position facing an ID tag attached to a pallet on a loading platform, and the received data is transmitted / received by transmitting / receiving radio waves to / from the ID tag. The digital signal is converted and sent to the arithmetic processing unit.
Therefore, according to the present invention, since the pallet is identified using the electromagnetic wave, it is possible to reliably perform the weighing without becoming indistinguishable due to dirt.
[0011]
The large transport vehicle according to the present invention includes a printer connected to the arithmetic processing unit, and prints out the weighing data such as the pallet number and the weight of the pallet contents.
Therefore, according to the present invention, confirmation in the transaction becomes convenient by stamping the weight of the contents of the pallet on the paper.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a large transport vehicle according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a large transport vehicle of the present embodiment, and FIG. 2 is a plan view thereof. This large transport vehicle (hereinafter referred to as “carrier”) 1 is provided with a loading platform 2 that enables loading of a large transported object, as in the conventional example, and is arranged under the loading platform 2. There are a total of eight devices 3, 3,.
[0013]
The carrier 1 is operated in the driver's cab 5 so that eight sets of traveling devices 3, 3,... Are interlocked, and traveling and steering are controlled by a controller. In the traveling device 3, a swing arm 12 that can swing in a vertical direction is pivotally attached to an arm 11 of a suspension bracket that is swingably provided at a lower portion of the loading platform 2, and the swing arm 12 is supported by a hydraulic cylinder 10. Constitutes a jack-up mechanism. Although not shown, an axle box is pivotally supported on a pivot at the tip of the swing arm 12 and a wheel 13 fitted with pneumatic tires is attached to both ends of the axle in the axle box.
[0014]
In the carrier 1, hydraulic oil is supplied to or discharged from the hydraulic cylinders 10... In response to a command from the cab 5, so that the rod is expanded and contracted. Therefore, the loading platform 2 and the cab 5 are raised by the extension operation of the hydraulic cylinders 10.10, and lowered by the contraction operation. Further, the carrier 1 is adapted to absorb the unevenness of the traveling path by the swinging motion of the hydraulic cylinder 10 and the swing arm 6 in the vertical direction.
[0015]
And in this embodiment, the weighing system which can measure the pallet weight carried on such a loading platform 2, especially the content is comprised. The carrier 2 of the carrier 1 is provided with lift devices 21, 21,. The lift devices 21, 21, etc. are configured such that the hydraulic cylinders are expanded and contracted by hydraulic control, and the pallet placed on the loading platform 2 is further moved up and down on the loading platform 2, and the pallet weight is measured while the pallet is lifted It is what you do. That is, the lift devices 21, 21... Are each provided with a load cell (not shown), thereby measuring the total weight of the pallet including the contents.
[0016]
In the present embodiment, the lifting device 21, 21... And each component shown in the block diagram of FIG. FIG. 3 is a block diagram showing the configuration of the weighing system in the carrier 1. The weighing system is configured with a controller 30 as a center, load cells 31, 31... Provided in the lift devices 21, 21... Are connected via an amplifier 32, and an identification device 33 for identifying a pallet, An ICT monitor 35 and a printer 36 for performing weighing operation and measurement display provided in the chamber 5 are connected.
[0017]
The identification device 33 identifies each pallet placed on the carrier 1 one by one. Therefore, an ID tag (transponder) is attached to each of a plurality of pallets, and an antenna 34 that reads pallet identification information from the ID tag is connected to the identification device 33. The identification device 33 and the antenna 34 are mounted on the loading platform 2 as shown in FIG. 1, and when the pallet is placed on the loading platform 2, the antenna 34 is mounted in front of the pallet as shown in FIG. It is arranged at a position where communication with the other ID tag 38 is possible. Here, FIG. 4 is a view showing a front portion of the loading platform 2 with the pallet 80 placed thereon.
[0018]
The pallet number is written in the ID tag 38 attached to the pallet, and the identification device 33 reads the pallet number from the signal of the ID tag 38 received by the antenna 34. In reading the pallet number, first, a radio wave is transmitted from the identification device 33, and energy necessary for a response operation is given to the ID tag 38. In the ID tag 38, power is obtained by the principle of electromagnetic induction, and pallet number data is transmitted. After transmitting the radio wave, the identification device 33 switches to a reception state, receives a signal from the ID tag 38, converts the received signal into a digital signal, and sends the signal to the controller 30.
[0019]
The weighing system of the carrier 1 measures the weight of the contents loaded on the pallet 80, and the controller 30 stores a program for performing a weighing operation. Therefore, in the carrier 1, the contents of the pallet are weighed as follows according to the program.
[0020]
First, when weighing, it is necessary to place the pallet on the loading platform 2 of the carrier 1 so that it can be transported. The carrier 1 is extended with the hydraulic cylinders 10.10 of the traveling devices 3, 3... To raise the position of the cab 5 so that the driver's view is improved. However, since the loading platform 2 cannot be placed in the pallet 80, the hydraulic cylinders 10.10 of the traveling devices 3, 3... Are temporarily contracted to lower the loading platform 2 when the pallet is placed on the loading platform 2.
[0021]
The carrier 1 on which the loading platform 2 has been lowered enters the loading platform 2 into the pallet 80 in a rearward direction, and as shown in FIG. 4, the carrier 1 is carefully retracted and stopped until it hits the tip of the pallet 80 as shown in FIG. Then, the hydraulic cylinders 10.10 of the traveling devices 3, 3... Are extended and the pallet 80 is placed on the loading platform 2 and lifted in the same manner as shown in FIG. A bracket 51 is erected at the tip of the loaded pallet 80, and an ID tag 38 is attached thereto. Therefore, when the pallet 80 is placed on the loading platform 2, the ID tag 38 is positioned in front of the antenna 34.
[0022]
Here, FIG. 5 is a diagram showing a weighing screen of the ICT monitor 35 installed in the cab 5. Then, next, the zero reset button 41 is touched on the ITC monitor 35, and the offset adjustment of each load cell provided in each lift device 21, 21... Is automatically performed. Subsequently, when the weighing start button 42 is touched, the weighing operation is started. In the weighing operation, first, data is read from the ID tag 38 of the pallet 80 loaded on the loading platform 2, and the number of the loaded pallet 80 is confirmed. That is, the signal of the pallet number written in the ID tag 38 is received by the antenna 34, and the signal is converted into a digital signal by the identification device 33 and sent to the controller 30.
[0023]
On the other hand, the hydraulic cylinders of the lift devices 21, 21... Are extended on the loading platform 2, and the pallet 80 is lifted. As a result, the pallet 80 is supported by the four lift devices 21, 21..., And the total weight of the pallet including the contents is measured by the four load cells provided in each of the lift devices 21, 21. A strain proportional to the stress is generated in the load cell due to the load applied to the lift device 21, and the electric current flowing changes because the electrical resistance of the strain gauge changes according to the strain. Then, the electric signal is sent to the controller 30 via the amplifier 32, and the load for each load cell, that is, the load shared by each lift device 21, 21,. Moreover, the load applied to each of the lift devices 21, 21... Is added, and the sum is calculated as the total weight of the pallet 80 including the contents.
[0024]
The controller 30 registers the weights of various pallets, and the weight of the pallet 80 that has previously read the pallet number is confirmed. Therefore, the actual load, which is the weight of only the contents, is calculated by subtracting the weight of the pallet 80 registered in advance from the total weight of the pallet 80 obtained as described above. The result of the total weight and the actual load obtained by such weighing operation is displayed on the ICT monitor 35 as shown in FIG. 5 when the weighing status button 43 is touched. That is, the ICT monitor 35 displays the pallet number, the total weight, and the actual load that is the weight of the contents. Further, if the weighing status button 43 is continuously pressed, weighing data such as a pallet number and an actual load is printed out by the printer 36.
[0025]
Therefore, according to the carrier 1 of the present embodiment, the pallet weight can be checked from the weight data for each pallet stored in advance by reading the pallet number from the ID tag 38 provided for each pallet. Even if the weight changes, the contents can be accurately weighed. Moreover, since such weighing can measure the weight of the contents when the pallet is loaded on the loading platform 2, it is possible to efficiently carry the carrier 1 without taking time for weighing.
[0026]
By the way, the weight registration of each pallet is lifted by the lift devices 21, 21,... In an empty state where nothing is contained, and is measured by the load cell, and the value is stored corresponding to the pallet number. As described above, transportation using pallets is carried out at a steelworks, and the pallets containing scraps are loaded at the scrap collection site and transported to the loading place. The empty pallet is returned to the scrap collection site. Therefore, the above-mentioned contents can be weighed more accurately by measuring and correcting the empty pallet weight each time or periodically.
[0027]
As mentioned above, although one embodiment was shown and demonstrated about the large sized conveyance vehicle, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning.
For example, in the above-described embodiment, the ID tag 38 is attached to identify the pallet, and this is identified by the identification device. According to such an electromagnetic wave, it is certain that it will not be indistinguishable due to dirt, but any other means such as an optical device as a pallet identification device can be used if measures are taken to avoid indistinguishability due to dirt. Good.
In the embodiment, when the pallet weight is registered, the value measured by using the lift device is stored. However, for the pallet of the same type whose weight is already known, the ICT monitor 35 may be input.
[0028]
【The invention's effect】
In the present invention, the weight of each pallet is stored, and the weight of the contents of the pallet is calculated from the loaded weight measured by the weight measuring device and the pallet weight of the pallet identified by the identification device. Therefore, it has become possible to provide a large transport vehicle equipped with a weighing system that can measure the weight of contents in one transport even when transported by different pallets.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a large transport vehicle.
FIG. 2 is a plan view showing an embodiment of a large transport vehicle.
FIG. 3 is a block diagram showing a configuration of a weighing system in a large transport vehicle.
FIG. 4 is a view showing a front portion of a loading platform with a pallet placed thereon.
FIG. 5 is a view showing a weighing screen of an ICT monitor installed in a driving room.
FIG. 6 is a side view showing a pallet transport state of a large transport vehicle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Carrier 2 Loading platform 3 Traveling device 5 Driver's cab 21 Lift device 30 Controller 31 Load cell 32 Amplifier 33 Identification device 34 Antenna 35 ICT monitor 36 Printer 38 ID tag

Claims (3)

In a large transport vehicle equipped with a large number of axles and supported by a jackup mechanism provided between the axles and the axles.
A lifting device for lifting the pallet placed on the loading platform on the loading platform and measuring the load weight with a weight measuring device;
An identification device for identifying the pallet placed on the carrier;
An arithmetic processing unit that stores the weight of each pallet and calculates the weight of the contents of the pallet from the loaded weight measured by the weight measuring device and the pallet weight of the pallet identified by the identification device;
A large transport vehicle comprising a display / operation device for performing a weighing operation for a weighing operation performed by the arithmetic processing unit, a display of a measurement result, and the like. In the large transport vehicle according to claim 1,
The identification device is connected to an antenna disposed at a position facing an ID tag attached to a pallet on a loading platform, and converts the received data into a digital signal by transmitting and receiving radio waves to and from the ID tag. Large transport vehicle characterized by being sent to. In the large-sized transport vehicle according to claim 1 or claim 2,
A large-sized transporting vehicle having a printer connected to the arithmetic processing unit and printing out weighing data such as a pallet number and a weight of pallet contents.

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