JP2013245970A - Apparatus for cutting, weighing and conveying material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously and speedily perform cutting and weighing of materials from a plurality of tanks.SOLUTION: A belt conveyor 2 has two longitudinal ends whose both widthwise sides are suspended from and supported by four load cells 7 mounted on a support frame 3. A plurality of tanks 10(n=1,2,3,...) arranged in a longitudinal direction are provided above a traffic side belt 8. A cutting gate 11of each tank 10and a control device 14 for controlling a drive device 13 of the belt conveyor 2 are connected to each load cell 7. The control device 14, when sequentially giving opening and closing commands to the cutting gate 11of each tank 10to execute cutting of a material 9, performs weighing while operating the belt conveyor 2 at slow speed, and weighs the cut material 9from a total measured value of the load cells 7. When cutting is stopped of the material 9from one tank 10, the control device 14 speedily discharges the cut material 9to a downstream side while operating the belt conveyor 2 at an increased high speed.

Description

  The present invention relates to a material cutting and conveying device that sequentially cuts a plurality of materials stored in individual storage tanks onto a conveyor and measures and conveys them.

  For example, in ladle refining (secondary refining) in the steel making process, a plurality of alloy additives are added in order to remove impurities from molten steel and to add constituent elements according to the steel to be manufactured. Sometimes.

  At this time, the plurality of alloy additives are preliminarily measured and cut out from the respective storage tanks, and the cut alloy additives are added to the molten steel.

  Conventionally, the additive charging device for measuring and cutting out the plurality of alloy additives from the storage tank has only a skip type discontinuity, and therefore the time required for the cutting process is increased. Is real.

  Therefore, it is desired to measure and cut out the plurality of alloy additives from individual storage tanks more quickly.

  By the way, as a conveyor, there exists a thing of the type provided with the measurement means for measuring the object to convey (weighing) (for example, refer patent document 1, patent document 2).

  In addition, as a method of weighing and subdividing articles, linear articles conveyed on a conveyor are accumulated on a weighing conveyor and weighed, and the total weight of the accumulated linear articles is a preset target. A technique has been proposed in which when the weight value is reached, the running speed of the weighing conveyor is rapidly increased to a discharge speed at which all the linear articles on the weighing conveyor are discharged at once (for example, Patent Documents). 3).

  Furthermore, as a measuring slicer, a supply unit provided with a conveyor for conveying the object to be cut, a cutting unit for slicing the object to be cut with a rotary blade, and pushing the cut object to the weighing unit side, and the cut object Conventionally, a configuration in which weighing units for weighing and transporting are sequentially provided has been proposed. In such a measuring slicer, when the cut material measured by the measuring unit reaches a predetermined weight, the operation speed of the conveyor unit of the measuring unit is increased by the time corresponding to one pitch of cutting of the rotary blade in the cutting unit. It is said that the cut pieces can be divided into predetermined weights by processing (see, for example, Patent Document 4).

JP-A-8-29239 JP-A-8-35877 JP 2000-234949 A Japanese Patent Laid-Open No. 7-40284

  However, the conveyor weighing means shown in Patent Document 1 and Patent Document 2 only measures the weight applied to the support structure disposed below the traffic side belt. For this reason, when transporting materials to the traffic side belt in a falling manner as in the case of cutting out material from the storage tank, the traffic side belt vibrates in the vertical direction, and this vibration causes the traffic side belt to contact the support structure. Or the tension of the traffic side belt changes, it becomes difficult to obtain an accurate measurement result under the influence of the change.

  The thing shown by patent document 3 is limited to the measurement object of a measurement conveyor to the single linear article conveyed by a conveyance conveyor. Therefore, in the said patent document 3, the idea which measures and cuts out the several material currently stored in the separate storage tank rapidly is not shown, and it is not even suggested.

  The thing shown by patent document 4 is limited to the single cut object formed by cut | disconnecting a to-be-cut object in a cutting part for the object to measure and convey in a measurement part. Therefore, in the said patent document 4, the idea which measures and cuts out the several material currently stored in the separate storage tank rapidly is not shown, and it is not even suggested.

  Therefore, the present invention cuts a plurality of materials stored in individual storage tanks on a moving conveyor in order, accurately measures them, discharges them at high speed after weighing, and lowers the conveyor after discharging. It is an object of the present invention to provide a material cut-out weighing and conveying apparatus that can be switched to perform cut-out weighing of the next material.

  In order to solve the above-mentioned problems, the present invention, corresponding to claim 1, supports both ends of the belt conveyor in the longitudinal direction so as to be suspended by three or four load cells attached to a support frame, and A plurality of storage tanks are arranged in the longitudinal direction at a position above the belt on the traffic side of the conveyor, and the lower end of each storage tank is operated to cut and stop the material stored in each storage tank by switching between opening and closing. A separate cut-out gate, and a control device, which provides a command for sequentially opening and closing the cut-out gate of each storage tank according to a preset order. And a function of weighing the material cut out on the traffic side belt from each storage tank based on the sum of the measured values by each load cell, and the variable of the belt conveyor When the material is cut out from one of the storage tanks to the driving device of the above type, a command for operating the belt conveyor at a low speed is given, and when the material cutting out from the storage tank is stopped, a certain timer setting is set. The belt conveyor is configured to have a function of giving a command to operate the belt conveyor at a higher speed than the slow speed operation.

According to the material cutting and conveying device of the present invention, the following excellent effects are exhibited.
(1) Each material stored in a plurality of storage tanks arranged in the longitudinal direction of the conveyor above the belt on the traffic side of the belt conveyor is cut out on the conveyor according to a set order. When the measured value is weighed (weighed), the material cutting can be stopped and the conveyor driven at a high speed to discharge the material.
(2) When weighing each material cut out from each storage tank, the belt conveyor is operated at a very low speed. Therefore, weighing can be performed in a state where many materials are placed on the traffic side belt and conveyed. it can.
(3) After weighing, each material on the measured traffic side belt is quickly sent to the downstream side by a belt conveyor that operates at a speed increased from that at the time of weighing by switching the conveyor driving speed to a high speed. be able to.
(4) Furthermore, since the belt conveyor is supported by the three-point suspension or the four-point suspension with the load cells interposed from the support frame, the belt conveyor is supported by dropping the material cut out from the storage tank. Even if the traffic side belt vibrates in the vertical direction and a change in tension or the like occurs, the measurement result of each load cell can be prevented from being affected. For this reason, in each said load cell, highly accurate measurement can be performed.
(5) By the above, the process which measures and cuts out each material stored by the said several storage tank to the desired quantity in the desired order can be implemented rapidly and correctly.

It is a cutting | disconnection schematic side view which shows one Embodiment of the cutting-out measurement conveyance apparatus of the material of this invention. It is an AA direction arrow line view of FIG. It is a partially cutaway side view which expands and shows the lower end part of the storage tank in the cut-out weighing and conveying apparatus of the material in FIG. It is a flowchart which shows the process sequence of the control apparatus in the cutting-out weighing conveyance apparatus of the material of FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  1 to 4 show an embodiment of a material cutting and conveying apparatus of the present invention.

  That is, the material cutting and conveying device of the present invention includes a belt conveyor 2 that is arranged at a certain height position on the foundation 1 so as to extend in the horizontal direction and can weigh (weigh) a conveyed product. .

  Around the installation position of the belt conveyor 2, a support frame 3 having a frame structure extending up and down to a height position that reaches a higher position than the installation position of the belt conveyor 2 is installed on the foundation 1.

  At one end and the other end in the longitudinal direction of the belt conveyor 2 (hereinafter referred to as the conveyor longitudinal direction), a rectangular frame-shaped support frame 5 surrounding the belt conveyor 2 within a plane orthogonal to the conveyor longitudinal direction is provided. The conveyor frame 4 is attached so as to be supported from below. Each support frame 5 has a bar-shaped suspension member 6 extending in the vertical direction at both ends in the horizontal direction perpendicular to the longitudinal direction of the conveyor at the upper end (both ends in the direction along the width direction of the belt conveyor 2). The lower end is attached individually. On the upper end side of each suspension member 6, individual load cells 7 installed at corresponding positions on the beam 3 a in the support frame 3, for example, beam type load cells 7 are attached.

  Thereby, the belt conveyor 2 is suspended from the support frame 3 at both ends in the longitudinal direction of the conveyor via the two load cells 7 and the suspension members 6 and the support frame 5. Supported by Therefore, in the four load cells 7 in total, the weight of the belt conveyor 2, the weight of each support frame 5, and the weight of each suspension member 6 are placed on the traffic side belt 8 of the belt conveyor 2. The weight including the weight of the object is weighed (measured) as the sum of the measured values by the load cells 7. For this reason, in the control device 14 to be described later, the measured values obtained by the four load cells 7 are added, and based on the result, the known weight of the belt conveyor 2, the weight of each support frame 5, and the weight of each suspension member 6 are calculated. The weight of the object placed on the traffic side belt 8 can be measured by the process of performing the subtraction operation.

A plurality of storage tanks 10 _n (n = 1, 2, 2) for storing different materials 9 _n (n = 1, 2, 3,...) Above the traffic side belt 8 of the belt conveyor 2. 3... Are fixedly supported by a beam 3 b arranged in the longitudinal direction and extending in parallel with the beam 3 a of the support frame 3.

Above the lower end of the reservoir 10 _n, the individual cutout gate 11 n for operating the cut-out and stopping are pooled material 9 _n (cutting off) by switching the opening and closing _(n = 1, 2, 3, ...) is provided. An electromagnetic feeder 12 _n (n = 1, 2, 3,...) Is provided below each cutting gate 11 _n . As a result, when the cutting gate 11 _n is opened, the corresponding electromagnetic feeder 12 _n is operated to smoothly drop the material 9 _n cut out from the corresponding storage tank 10 _n onto the traffic side belt 8. You can make it.

Moreover, above each storage tank 10 _n, as shown in FIG. 3, on the upstream side (upper side) and a position of and the clipping gate 11 _n at the lower end of the respective reservoir 10 _n, for example, manual opening The adjustment gate 15 is provided. Thus, in each of the storage tanks 10 _n , the opening degree of the opening adjusting gate 15 is adjusted in advance, so that the unit is moved onto the traffic side belt 8 per unit time when the cutting gate 11 _n is opened. the amount of material 9 _n for dropping feed are also available regulation. Accordingly, in each of the storage tanks 10 _n , by appropriately adjusting the opening degree of the respective opening adjustment gates 15 in advance, the belt conveyor 2 can be operated at a slow speed, which will be described later, when the cutting gate 11 _n is opened. An appropriate amount of material 9 _n corresponding to the amount of movement of the traffic side belt 8 per unit time when operating at a certain cutting speed V1 can be cut out.

Furthermore, as shown in FIG. 1, based on an input from the load cell 7, above a belt speed-variable drive unit 13 of the conveyor 2, above the storage tank 10 _n cutout gate 11 _n and the electromagnetic feeder 12 _n The configuration includes a control device 14 for giving a control command.

  Next, the processing contents by the cut-out weighing and conveying apparatus of the present invention will be described in accordance with the description of the function of the control device 14.

  The control device 14 includes an input unit 16 and a storage unit 17.

In the control device 14, when data about each material 9 _n stored in the storage tank 10 _n is input to the input unit 16 in advance, the storage tank 10 _n and the material 9 _n are associated with each other. Thus, the data can be stored in the storage unit 17.

Further, each reservoir 10 _n are arranged differently relative to the longitudinal direction of the belt conveyor 2, respectively. Therefore, the region in which the material 9 _n can be placed from the position immediately below each storage tank 10 _n in the traffic side belt 8 to the downstream end in the transport direction is different for each storage tank 10 _n . Furthermore, the amount of each material 9 _n that can be placed per unit length of the traffic side belt 8 is not necessarily constant due to the influence of the properties, repose angle, and the like. Moreover, each material _{9 n} has a specific gravity respectively different. Accordingly, the material 9 _n cut out from each of the storage tanks 10 _n may have different upper limits on the weight that can be weighed at a time while being placed on the traffic side belt 8. Also, depending on the rated capacity of each load cell 7, there is an upper limit on the weight that can be measured at one time.

In view of this, in the control device 14, the upper limit value for the weight that can be weighed at one time for each material 9 _n of each storage tank 10 _n is stored in the storage unit 17 as the weighing upper limit value An (n = 1, 2, 3,...).

Furthermore, each reservoir 10 _n is to the opening operation of the cutting gate 11 _n, by operating the electromagnetic feeders 12 _n, from a state that implement the extraction operation of the material _{9 n,} closing the cutting gate 11 _n Even if the operation of the electromagnetic feeder 12 _n is stopped and the cutting operation is stopped, the cutting gate 11 _n and the electromagnetic feeder 12 _n and the traffic side belt 8 are not In the space between them, there is a material 9 _{n in the} middle of dropping. Thus, the final weight of the material 9 _n to be placed on the belt conveyor 2 is cut out from the respective storage tank 10 _n, the operation described above on the basis of the measured values by the respective load cell 7 at the stop time of the cut operation Is a value obtained by adding the weight of the material 9 _{n in} the middle of dropping at the time when the cutting operation is stopped.

Therefore, in each of the storage tanks 10 _n , the post-stop weight increase Bn (n = 1, 2, 3,...) Of the material 9 _n detected by each load cell 7 after the cutting operation is stopped is preliminarily tested. in so as to obtain respectively, the storage unit 17 of the controller 14, it is so as to store data after stopping the weight increase Bn for each material 9 _n each reservoir 10 _n.

Further, the control device 14 sets the driving speed of the driving device 13 of the belt conveyor 2 to a very low speed when the material 9 _n is cut out on the traffic side belt 8 of the belt conveyor 2 sequentially from the storage tanks 10 _n. to give a command, then, the opening operation command to the corresponding cutout gate 11 _n, are to provide a operation starting instruction to the electromagnetic feeder 12 _n. Further, when the value for measuring each material 9 _n cut out from the storage tank 10 _n onto the traffic side belt 8 reaches the target value, the control device 14 closes the closing operation command to the cutting gate 11 _n , and At the same time as giving an operation stop command to the electromagnetic feeder 12 _n , a command to switch the driving speed of the belt conveyor 2 to increase the operation speed is given.

When cutting out the material 9 _n of each storage tank 10 _n using the control device 14 having various data stored in the storage unit 17 as described above, first, the material 9 _n is cut out to the input unit 16 of the control device 14. The power material 9 _n and its measured value Cn (n = 1, 2, 3,...) And the order of cutting out each material 9 _n are input (step S1). For convenience of explanation, an example in which the order of cutting out the material 9 _n follows the arrangement order of the storage tanks 10 _n , that is, the order of n (n = 1, 2, 3,...) Is shown. .

In this state, the control device 14 first gives an operation command at the cutting speed V1, which is a slow speed operation, to the driving device 13 of the belt conveyor 2, and the cutting speed V1 of the belt conveyor 2 is set. Is started (step S2). Range this time, the cut-out at the speed V1 is made possible to shift gradually to a drop position on the traffic side belt 8 of the material 9 _n cut from the storage tank 10 _n, excessive deposition does not occur It is desirable to set the speed as low as possible.

Next, the control device 14 sets n = 1 so that the measurement order is first (step S3), and then the storage tank 10 _n in which the n-th material 9 _n is stored is measured. cut material 9 _n, weighed, in order to discharge, along with providing an open operation command to the cutout gate 11 _n, giving the operation start command to the electromagnetic feeder 12 _n. Thus, in the storage tank 10 _n , the cutting operation of the material 9 _n is started by opening the cutting gate 11 _{n and} operating the electromagnetic feeder 12 _n (step S4). The cut material 9 _n is sequentially placed on the traffic side belt 8 of the belt conveyor 2 that is operated at the cutting speed V1.

When the cutting operation of the material 9 _n is started as described above, the control device 14 determines the weight of the belt conveyor 2, the weight of the support frame 5, and the suspension members from the sum of the measurement values by the load cells 7. the operation of subtracting the 6 dead weight of, calculated on the weight measured value Dn of the material 9 _n, to monitor the weight measured value Dn obtained the (step S5).

  When monitoring the actual weight value Dn, the control device 14 determines whether or not the measurement value Cn set in step S1 is equal to or less than the above-described measurement upper limit value An (step S6). If the value Cn is less than or equal to the weighing upper limit value An, the process proceeds to step S7, and the weighing value Cn is set to the weighing target value En.

  On the other hand, if it is determined in step S6 that the measured value Cn is not less than or equal to the measured upper limit value An and exceeds the measured upper limit value An, the control device 14 proceeds to step S8 and proceeds to the measured value. The upper limit value An is set to the measurement target value En.

Specific examples, for example, under the conditions that the weighing upper limit of the material _{9 n} An is set to 500 kg, when the weight value Cn that is set in the material 9n is 300 kg, in the step S7, the The weighing value Cn of 300 kg is set to the current weighing target value En. On the other hand, when the weighing value Cn set for the material 9 _n is 800 kg, it exceeds 500 kg of the weighing upper limit value An and cannot be weighed at once. Therefore, the same material 9 _n may be weighed a plurality of times and the desired weighed value Cn may be obtained by accumulating the same. For this purpose, first, in step S8, 500 kg of the weighing upper limit value An is set to the current weighing target value En.

When metering the target value En is set in step S7 or step S8 as described above, the controller 14 proceeds to step S9, the weight measured value Dn of the material 9 _n being monitored, the metering target It is determined whether or not a value obtained by subtracting the post-stop weight increase Bn from the value En is reached. While the value En is not reached, the material 9 _n is continuously cut out in a certain determination cycle. The process of step S9 is repeatedly executed (step S10).

On the other hand, in step S9, the weight measured value Dn of the material 9 _n is, if it is determined to have reached the value obtained by subtracting the stop after Extra weight Bn from the weighing target value En, the controller 14 , along with providing a closing operation instruction to the cutting gate 11 _n of the storage tank 10 _n, it gives an operation stop instruction to the electromagnetic feeder 12 _n. Thus, in the storage tank 10 _n , the cutting operation of the material 9 _n is stopped by closing the cutting gate 11 _{n and} stopping the electromagnetic feeder 12 _n (step S11).

In the belt conveyor 2, the material 9 _n weight of the material 9 _n corresponding to the stop after Extra weight Bn which are present in the air in the cutout operation stop time point from the storage tank 10 _n is, on the traffic side belt 8 Since the material further falls, the material 9 _n having a weight corresponding to the measurement target value En is placed on the traffic side belt 8.

After stopping the cutting operation from the storage tank 10 _n as described above, the control device 14 performs the above cutting as shown by a two-dot chain line in FIG. 1 with respect to the driving device 13 of the belt conveyor 2. An operation command is given at a discharge speed V2 that is higher than the hourly speed V1. Thus, the belt conveyor 2, in order to become operating at the discharge time of speed V2, the material 9 _n resting on the traffic side belt 8 is conveyed rapidly to the downstream side in the conveying direction (Step S12).

At this time, when the operation of the belt conveyor 2 at the discharging speed V2 is started, the control device 14 counts a time set in a timer (not shown). The timer setting time is the distance from the position immediately below the storage tank 10 _{n where} the material 9 _n is cut out in the longitudinal direction of the traffic side belt 8 to the downstream end in the transport direction at the discharge speed V2. It is assumed that the time is set to be more than the time calculated by dividing. Thus, in the belt conveyor 2, the control unit 14 while counting the timer setting time, the traffic side belt 8 weight of the material 9 _n corresponding to the metric target value En which is placed on, all Then, it is sent to a device (not shown) provided on the downstream side of the belt conveyor 2.

  After that, when the timer set time elapses, the control device 14 gives an operation command at the cutting speed V1 to the driving device 13 of the belt conveyor 2 to decelerate the belt conveyor 2 and turn it off again. The vehicle is operated at the outgoing speed V1 (step S13).

When the delivery of the material 9 _n having the weight corresponding to the measurement target value En to the downstream device is completed as described above, the control device 14 determines whether or not the measurement target value En is the measurement value Cn. A determination is made (step S14).

Here, the situation where the measurement target value En is determined not to be the measurement value Cn is a case where it is determined in step S6 that the set measurement value Cn exceeds the measurement upper limit value An. performing metering of the material 9 _n that only weighing upper limit an amount was weighed target value En of the set weight value Cn, is a state of being transmitted to the downstream device (not shown).

Therefore, when it is determined in step S14 that the measurement target value En is not the measurement value Cn, the control device 14 sets a value obtained by subtracting the measurement upper limit value An from the measurement value Cn as a new measurement value Cn. It is updated (step S15), and then the process returns to step S6. Thereby, the control device 14 targets the same material _9n as the target in the step S15 until the measurement target value En is determined to be the measurement value Cn at that time in the step S14. after updating the weight value Cn, by repeatedly performing processing cycle from step S6 to step S14, the material 9 _n, it is to be able to accumulate by weight minutes of the weighing target value En.

Meanwhile, the situation where the weighing target value En in step S14 is judged to be metered value Cn at that time, finally is performed metered material 9 _n of weight corresponding to the metering value Cn, not shown It is the state sent to the downstream equipment. Therefore, in this case, regardless of whether the measurement value Cn is updated in step S15 and the subsequent processing cycle from step S6 to step S14 is repeated, the downstream device (not shown) is finally connected. Delivery of the material 9 _{n having} a weight corresponding to the measurement value Cn initially set in step S1 is completed.

Therefore, when it is determined in step S14 that the measurement target value En is the measurement value Cn at that time, the control device 14 proceeds to step S16, and the measurement order is the first material 9 _n ( The cut-out weighing process for n = 1) is terminated.

Thereafter, the control unit 14, the clipping metering process material 9 _n ended is metered order performs the judgment whether it is the last material 9 _n (step S17), if the metering sequence is not the last in , N = n + 1, the weighing order is lowered by one (step S18), and the processing from step S4 to step S17 is performed on the material 9 _n (n = 2) whose weighing order is next.

Furthermore, the control unit 14, by performing repeatedly the processing cycle from step S4 to step S17 while shifted down one weighing sequence in step S18 in the same manner as described above, it is stored in the storage tank 10 _n Each material 9 _n is sequentially cut out and weighed according to the weighing value Cn set in step S1 according to the weighing order (n = 1, 2, 3,...) It is sent to a downstream device (not shown).

When the material 9 _n having the last weighing order is subjected to the cutting weighing process with the weight corresponding to the predetermined weighing value Cn by the above procedure, the control device 14 cuts out the weighing measurement process in the step S17. There finished material 9 _n are, so weighing order is determined to be the last of the material 9 _n. Therefore, in this case, the control device 14 gives a stop command to the driving device 13 of the belt conveyor 2, stops the operation of the belt conveyor 2 (step S19), and ends all processing. is there.

The material cutting and conveying device of the present invention having the above-described configuration is provided with a plurality of storage tanks 10 _n (n = 1, 2, 3) arranged in the longitudinal direction of the conveyor on the traffic side belt 8 of the belt conveyor 2. from ...), each material 9 _n that is stored in each of the order which has been set, are sequentially metered in weight corresponding to the weight value Cn that is set for each material 9 _n, be cut it can.

In this case, when performing metering of the materials 9 _n cut from each reservoir 10 _n, because you have to operate the belt conveyor 2 at a cutting time of the speed V1 as slow-speed operation, in one weighing, Many materials 9 _n can be placed on the traffic side belt 8 for weighing.

Thereafter, the materials 9 _n on the traffic side belt 8, which is the metering, when to sent to the downstream side, because you have to operate the belt conveyor 2 in a faster discharge time speed V2, the said transmission output process promptly Can be implemented.

Furthermore, the belt conveyor 2, since that is not supported so as hung by the load cell 7 of four positions of the hanging four across, with a drop-on material 9 _n to be extracted from storage tank 10 _n, the traffic side belt Even if the belt 8 vibrates in the vertical direction and a change in tension or the like occurs in the traffic side belt 8, the measurement result of each load cell 7 can be prevented from being affected. For this reason, in each said load cell, highly accurate measurement can be performed.

Therefore, according to the material cutting and conveying device of the present invention, the process of measuring and cutting out each material 9 _n stored in the plurality of storage tanks 10 _n to a desired amount in a desired order, Can be implemented accurately.

The present invention is not limited only to the above-described embodiment, and is a material 9 _n that needs to be sequentially cut and weighed from the state stored in the individual storage tank 10 _n , and the belt As long as the material 9 _n can hold the state of being placed on the traffic side belt 8 of the conveyor 2, the material 9 _n may be applied to the cutting and weighing process of any material 9 _n other than the alloy additive.

As long as the belt conveyor 2 can hold the material 9 _n cut out from the storage tank 10 _n on the traffic side belt 8, it is perpendicular to the belt surface at predetermined intervals in the circumferential direction and at both edges in the width direction. Any other type of belt conveyor 2 may be employed, such as a type provided with a partition plate (partition weir) projecting on the other side.

The belt conveyor 2 has a configuration in which both ends in the longitudinal direction of the conveyor are supported by four-point suspensions suspended from the support frame 3 with two load cells 7 interposed therebetween. One end, more preferably the end on the upstream side in the transport direction, may be supported by a three-point suspension that is suspended from the support frame 3 with one load cell 7 interposed therebetween. Even in such a configuration, in the belt conveyor 2, the change in the tension of the traffic side belt 8 due to the dropping and feeding of the material 9 _n cut out from the storage tank 10 _n , etc. It is possible to prevent the measurement result of the load cell 7 from being affected.

The order in which the cut-out weighing process is performed for each material 9 _n may be any order other than the order in which the storage tanks 10 _n are arranged. Furthermore, it is not necessary to cut out the material 9n stored in all the storage tanks 10n as necessary. In this case, the storage tanks 10 _n and the materials 9 _n to be subjected to the cut-out weighing process are not arranged in the order shown in FIG. 1 but in the order of n (n = n = The processing flow shown in FIG. 4 may be performed in a state with 1, 2, 3,.

The lower ends of the reservoir 10 _n, it is desirable to provide an electromagnetic feeder 12 _n with cutout gate 11 _n, it may be omitted electromagnetic feeders 12 _n.

Weighing upper limit An and metric Cn material 9 _n on the properties of the material 9 _n, the structure of the belt conveyor 2, may be appropriately changed according to the rated capacity of each load cell 7.

  Of course, various modifications can be made without departing from the scope of the present invention.

2 belt conveyor 3 support frame 7 load cell 8 traffic side belt 9 _n material 10 _n storage tank 11 _n cutting gate 13 drive device 14 control device

Claims (1)

The longitudinal ends of the belt conveyor are supported by three or four load cells attached to a support frame,
A plurality of storage tanks are arranged in the longitudinal direction above the traffic side belt of the belt conveyor,
The lower end of each storage tank is provided with a separate cutting gate for operating the cutting and stopping of the material stored in each storage tank by switching between opening and closing,
Furthermore, a control device is provided,
The control device is configured to provide a command for sequentially opening / closing the cut-out gates of the storage tanks according to a preset order, and the traffic from the storage tanks based on the sum of measured values of the load cells. A function to measure the weight of the material cut out on the side belt and the belt conveyor variable speed drive device, when the material is cut out from any one of the storage tanks, the belt conveyor is operated at a slow speed. A function to give a command to operate the belt conveyor at a higher speed than the slow speed operation for a certain timer setting time when the cutting of the material from the storage tank is stopped. A material weighing and conveying device characterized by having the structure described above.

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