JP2002068441A - Air floating type belt conveyor system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain variation of floating and sinking of a belt in simple constitution regardless of a load state. SOLUTION: This belt conveyor system is furnished with a belt conveyor 2 having the belt B floating and traveling by air supplied through an air supply part 6 and a moving carrier device 3 free to move along the belt B and to carry a carried article S to the belt B. It is also furnished with a positional detection device 19 to detect a position of the moving carrier device 3 to the belt B and an air adjustment part 12 to adjust air quantity to supply through the air supply part 6 in accordance with a detection result of the positional detection device 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air levitating belt conveyor system having a conveyor belt driven while being levitated and held by an air layer, and more particularly to an air levitating belt conveyor system in which an object to be conveyed is transferred from a movable unloader. It relates to a belt conveyor system.

[0002]

2. Description of the Related Art In general, a belt conveyor system in which an unloader (moving and transporting device) and a belt conveyor are combined is often used as a device for transporting conveyed objects such as ore and coal carried by a ship to a port or the like. ing. In this case, the belt conveyor is installed along the ship on the ground, and the unloader is configured to run on a rail laid along the belt conveyor.

When unloading an object from a ship, the unloader is first moved to the unloading position. Next, the conveyed object is carried out of the ship by the unloader and put into the belt conveyor. Then, the transported object is transported to a predetermined location by the belt conveyor. In this way, by making the unloader movable, the transported object can be carried out at an arbitrary position with respect to the ship.

[0006] A chute for feeding a conveyed object to the belt conveyor is provided above the belt at a connecting portion between the unloader and the belt conveyor, and a chute for feeding the conveyed object is provided below the chute. There is a rubber skirt for introducing the rubber skirt. By arranging the rubber skirt in contact with the belt, dust generation when the transported object is thrown on the belt is prevented.

Conventionally, as the above-mentioned belt conveyor, a roller-supporting type is often used, but as a countermeasure against noise and vibration caused by the rotation of the roller, adoption of an air floating type is being studied. . In this air levitation type belt conveyor, a belt is arranged along a trough, and air supplied from an air supply blower to an air duct is ejected between the trough and the belt, thereby forming an air layer between the belt and the trough. The belt is formed and floated. With this configuration, the resistance acting on the belt conveyor and noise and vibration can be significantly reduced.

[0006]

However, the conventional air-floating belt conveyor system as described above has the following problems. In the air levitation method, the belt is raised or lowered depending on the load on the belt, that is, the presence or absence of the conveyed object. Therefore, when the belt sinks, a gap is formed between the belt and the rubber skirt, and there is a concern that dust and spillage from the gap may occur. Further, since the upstream side of the connecting portion is always empty and in a no-load state, it is not necessary to supply the air amount corresponding to the load.

[0007] Furthermore, it is conceivable to make a truck using a load receiving roller travel along with the unloader at the connecting portion, but in this case, the structure becomes complicated and the cost increases.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above points, and has as its object to provide an air-floating belt conveyor system that has a simple configuration and suppresses fluctuations in the ups and downs of a belt regardless of a load state. Aim.

[0009]

In order to achieve the above object, the present invention employs the following constitution. The air levitation type belt conveyor system according to claim 1, wherein the belt conveyor has a belt that floats and travels by air supplied through an air supply unit, and is movable along the belt.
And a position detecting device for detecting a position of the moving and conveying device with respect to the belt, and a detecting device for detecting the position of the moving and conveying device with respect to the belt. And an adjusting unit that adjusts the amount of air supplied through the air supply unit based on the result.

Therefore, in the air-floating belt conveyor system of the present invention, a larger amount of air is supplied to the belt downstream of the position of the moving conveyance device detected by the position detecting device, and the belt on the upstream side is supplied. , A smaller amount of air can be supplied as compared with the downstream side. Therefore, more lifting force is applied to the downstream belt where the load is increased due to the transport of the transported object from the moving transport device, and the upstream belt where no load is applied due to the empty load is compared with the downstream belt. Since a small levitation force can be applied, the ups and downs of the belt can be kept constant.

According to a second aspect of the present invention, there is provided an air levitation type belt conveyor system according to the first aspect, wherein the air supply unit is disposed at a predetermined interval in a length direction of the belt. An on-off valve is provided, and the adjusting unit controls opening and closing of the on-off valve based on a detection result of the position detection device.

Therefore, in the air levitation type belt conveyor system of the present invention, the opening and closing valve corresponding to this range is opened for the belt on the downstream side of the position of the moving conveyance device detected by the position detection device, so that more belts are opened. A small amount of air can be supplied to the belt on the upstream side by reducing the opening amount of the on-off valve corresponding to this range as compared with the downstream side.

According to a third aspect of the present invention, there is provided an air levitating belt conveyor system according to the first or second aspect, further comprising a load detecting device for detecting a load of the moving and transporting device, wherein the adjustment is performed. The department is
The air amount supplied via the air supply unit is adjusted based on a detection result of the load detection device.

Therefore, in the air-floating belt conveyor system of the present invention, the conveyed object is not conveyed to the belt when no load is applied to the moving conveyance device due to an empty load.
Even if it is on the downstream side of the position of the moving conveyance device, the supply amount to the belt is not increased, and when a load is applied, the conveyed object is conveyed to the belt. Can supply more air.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air-floating belt conveyor system according to the present invention will be described below with reference to FIGS. FIG. 1 is a schematic configuration diagram of an air-floating belt conveyor system 1 that is schematically composed of a belt conveyor 2 and an unloader (moving and conveying device) 3.

The belt conveyor 2 is installed along the longitudinal direction of the ship or the like, and has a forward trough 4 and a return trough 5 for defining the belt B in a valley shape. And air ducts (air supply units) 6 and 7 provided along the vertical direction. A plurality of through holes (not shown) are formed in each of the troughs 4 and 5 along the air ducts 6 and 7, and the air supplied through the air ducts 6 and 7 is ejected from the through holes toward the belt B. Thus, an air layer is formed between the belt B and the troughs 4 and 5 to float the belt B.

As shown in FIG. 2, the air duct 6 is composed of a plurality of (seven in the present embodiment) divided ducts 6a to 6g partitioned in the longitudinal direction, for example, at intervals of 10 m. Air is supplied to the ducts 6a to 6g by two systems from supply systems K1 and K2. In the supply system K1,
A constant amount of air corresponding to when the belt B is not loaded is constantly supplied from the air supply fan 8. In the supply system K2,
Opening / closing valves 10a to 10g (collectively denoted by reference numeral 10 in FIG. 1) are provided between the air supply fan 9 and each of the divided ducts 6a to 6g, and supply air when the on / off valves 10a to 10g are open. Air is supplied from the air fan 9. Supply system K
The amount of air supplied from 2 is set so that the amount of air supplied from both of the supply systems K1 and K2 becomes the required amount of air when a load is applied to the belt. For example, if the amount of air required when the belt B is not loaded is 50 units and the amount of air required when the belt B is loaded is 100 units, 50 units of air are supplied from the supply systems K1 and K2, respectively.

Each of the on-off valves 10a to 10g has an on-off valve 10a.
Motors 11a to 11g (in FIG. 1, collectively denoted by reference numeral 11) for opening and closing a to 10g are respectively provided.
The driving of each of the electric motors 11a to 11g is controlled by a control unit (adjustment unit) 12
Is controlled by As shown in FIG. 1, the air duct 7 is constantly supplied with a corresponding amount of air from the air supply fan 8 when the belt B is not loaded.

As shown in FIG. 1, the unloader 3 includes a rail 13 laid along the belt B on the ground J, a frame 14 running on the rail 13, and attached to the frame 14. A belt conveyor 15 for transporting / injecting a conveyed object S such as coal is mainly constituted, and the belt conveyor 15 is arranged at an arbitrary position along the belt B by the frame 14 traveling on the rail 13. it can.

The frame 14 is provided with a chute 16 positioned above the belt B for feeding the conveyed object S onto the belt B. Below the chute 16, a chute 16 is provided. Rubber skirts 17 for introducing S into the belt B are provided on both sides in the width direction of the belt B, with the lower end contacting the belt B. The belt conveyor 15 is driven by a motor (load detecting device) 18,
The load acting on the motor 18 is transmitted to the control unit 12 as a load signal.
Is output to

On the other hand, the air-floating type belt conveyor system 1 is provided with a position detecting device 19 for detecting the position of the unloader 3 with respect to the belt B (transit position). The position detecting device 19 detects the position of the unloader 3 as an address corresponding to the divided ducts 6a to 6g, and outputs a detection result to the control unit 12 as an address signal by an encoder.

Next, the operation of the air levitation type belt conveyor system 1 having the above configuration will be described. here,
It is assumed that air is supplied to the air ducts 6 and 7 from the air supply fan 8 in advance, and the belt B is flying and running.

First, when the load signal output from the motor 18 indicates an empty state, the control unit 12 controls the air duct 6 via the electric motors 11a to 11g.
Operate all 0 g closed. As a result, from the through hole of the trough 4, an appropriate air amount of 50 units corresponding to the empty load (no load) is jetted from the supply system K 1 toward the belt B.

Next, the belt conveyor 1 of the unloader 3
When the load S on the object S is conveyed by the motor 5 and the load on the motor 18 increases, the control unit 12 first moves the unloader 3 to the divided duct 6 based on the address signal output from the position detecting device 19.
It recognizes that it is at the position corresponding to d. That is, the control unit 12 recognizes that the transported object S is transferred on the belt B on the divided duct 6d.

The control unit 12 controls the motors 11e-1e
1g, the on-off valves 10e to 10g are closed, and the supply system K2 is connected to the divided ducts 6e to 6g on the upstream side of the divided duct 6d.
To make the amount of air supplied to zero. At the same time, the control unit 12
Are open / close valves 10a to 10d via electric motors 11a to 11d.
And the downstream side divided duct 6a including the divided duct 6d
The supply system K2 also supplies 50 units of air to に 対 し て 6d.

With this arrangement, the supply ducts K1 through K1 are connected to the divided ducts 6a-6d downstream of the unloader 3.
Units, 50 units of air are supplied from the supply system K2, and 100 units of air required at the time of load are ejected toward the belt B from the through holes of the trough 4. Further, the supply system K is provided to the divided ducts 6e to 6g on the upstream side of the unloader 3.
Only the air quantity from 1 to 50 units is blown towards belt B.

When the unloader 3 moves along the rail 13, the air supply amount to the divided ducts 6a to 6g is first determined according to the load signal of the motor 18 in the same manner as described above. When the load is determined, based on the address signal detected by the position detecting device 19, air is supplied only from the supply system K1 to the divided duct upstream of this address, and supplied to the downstream divided duct including this address. Air is supplied from the supply system K2 in addition to the system K1.

In the air-floating belt conveyor system according to the present embodiment, the amount of air supplied to the divided ducts 6a to 6g is adjusted according to the position of the unloader 3, so that the weight of the transferred object S causes the air to flow downstream of the unloader 3. Even if a force in the direction of sinking acts on the belt B located thereon, the belt B can be levitated with a large levitation force, and the belt B located on the upstream side can be levitated with a levitation force corresponding to the empty load. Therefore, unloader 3
Even if the position of the belt B fluctuates, the fluctuation of the ups and downs of the belt B can be suppressed, so that no gap is generated between the belt B and the rubber skirt 17 to prevent dust and spillage. be able to.

Particularly, in the present embodiment, the position detecting device 1
9, since the air supply amount is adjusted with a simple configuration of the opening / closing valves 10a to 10g and the electric motors 11a to 11g, there is no increase in cost as in the case of using a load receiving roller in the connecting portion. In addition, since it is not necessary to take measures against noise when using the receiving roller, it is possible to contribute to downsizing of the system and cost reduction.

Further, in the present embodiment, the amount of air supplied to the divided duct is adjusted according to the load of the unloader 3 on the belt conveyor 15, so that it is possible to prevent the amount of air ejected from becoming excessive when empty. .

In the above embodiment, the supply system K
Although the configuration in which air is supplied to the air duct 6 by two systems of K1 and K2, air may be supplied by one system. in this case,
A throttle valve may be provided instead of the on-off valve so that the amount of air to be supplied can be variably set according to an empty load or a load.

[0032]

As described above, in the air-floating type belt conveyor system according to the first aspect, the position detecting device detects the position of the moving and conveying device, and the adjusting section detects the position of the moving and conveying device based on the detection result of the position detecting device. The configuration is such that the amount of air supplied through the air supply unit is adjusted. As a result, in the air-floating belt conveyor system, even if the moving / transporting device moves and the position fluctuates, fluctuations in the ups and downs of the belt can be suppressed, so that a gap is generated between the belt and the rubber skirt. Without this, it is possible to prevent dusting and spillage.

The air levitation type belt conveyor system according to the second aspect is configured such that the adjusting unit controls the opening and closing of the on-off valve based on the detection result of the position detecting device. Thus, in this air-floating type belt conveyor system, since the air supply amount is adjusted with a simple configuration, the effect of not increasing the cost unlike the case of using the load receiving roller in the connecting portion can be obtained. In addition, since it is not necessary to take noise countermeasures when using the receiving roller, it is possible to reduce the size and cost of the system.

In the air-floating belt conveyor system according to the third aspect, the load detecting device detects the load of the moving and conveying device, and the adjusting unit supplies the load via the air supply unit based on the detection result of the load detecting device. The air amount is adjusted. As a result, in the air-floating belt conveyor system, an effect of preventing an excessive amount of air from being ejected during unloading can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a schematic configuration diagram of an air-floating belt conveyor including a belt conveyor and an unloader.

FIG. 2 is a schematic configuration diagram of the air levitation type belt conveyor.

[Explanation of symbols]

 B Belt 1 Air-floating belt conveyor system 2 Belt conveyor 3 Unloader (moving and conveying device) 6, 7 Air duct (air supply unit) 10a to 10g Open / close valve 12 Control unit (adjustment unit) 18 Motor (load detection device) 19 Position Detector

Claims (3)

[Claims] 1. A belt conveyor having a belt that floats and travels by air supplied through an air supply unit, and a moving conveyance device that is movable along the belt and conveys an object to be conveyed to the belt. An air-floating belt conveyor system comprising: a position detecting device that detects a position of the moving conveyance device with respect to the belt; and an amount of air supplied through the air supply unit based on a detection result of the position detecting device. An air levitation type belt conveyor system, comprising: an adjusting unit for adjusting. 2. The air levitation type belt conveyor system according to claim 1, wherein the air supply unit is provided with on-off valves arranged at predetermined intervals in a length direction of the belt, and the adjustment unit includes: An air levitation type belt conveyor system, wherein opening and closing of the on-off valve is controlled based on a detection result of a position detection device. 3. The air-floating belt conveyor system according to claim 1, further comprising: a load detection device that detects a load of the moving conveyance device, wherein the adjustment unit is configured to detect a load of the mobile conveyance device based on a detection result of the load detection device. An air-floating belt conveyor system, wherein the amount of air supplied through the air supply unit is adjusted.