JPH07100924B2 - Hopper material cutting device - Google Patents

Description

Detailed Description of the Invention

[Industrial applications]

The present invention relates to a hopper material cutting device for material transportation.

[Prior art]

The second is, for example, a schematic view of a control system of a conventional hopper material cutting device of this type. FIG. 2A is an overall system configuration diagram and FIG. 2B is a block diagram of a speed control device. .
In the figure, 1A, 1B and 1C are charging hoppers provided on a plurality of collecting conveyors 5 to be described later, 2A, 2B and 2C are charging trucks for charging materials into the respective charging hoppers 1A, 1B and 1C, 3A, 3B, 3C
Is the package loaded by this loading truck 2A, 2B, 2C,
4A, 4B, 4C are cutting feeders provided in the respective input hoppers 1A, 1B, 1C, 5 is a collective conveyor for conveying the material cut out from the cutting feeders 4A, 4B, 4C, 6A, 6B and 6C are feeder motors that drive the cutting feeders 4A, 4B and 4C, 7A and 7C
B, 7C is the variable speed main circuit for this feeder motor 6A, 6B, 6C,
8A, 8B, 8C are respective feeder contactors, 9A, 9B, 9C are power breakers for supplying power to respective feeder motors 6A to 6C, 10A, 10B, 10C are speed control devices for controlling respective feeders, 11 is Selector switch for turning on / off feeder contactors 8A-8C provided for each feeder, 12
Is a selection judgment circuit, 13 is a cutting speed setting device for setting the speed of the feeder motor 6 provided in each feeder, and 14 is a setting signal SV from the cutting speed setting device 13 and the feeder motor 6
Reference numeral 15 is a comparison circuit for making a comparison with the actual measurement value PV from the speed detector 18 provided in FIG. Next, the operation will be described. First, input truck 2A ~ 2C
If 3A to 3C such as earth and sand is collected, the input truck 2A
.About.2C enter the predetermined positions of the charging hoppers 1A to 1C provided at a plurality of places, and charge only a predetermined set amount. The transport objects 3A to 3C once stored in the input hoppers 1A to 1C are controlled by the feeder motors 6A to 6C to control the cutting feeders 4A to 4C, and the transport objects 3A to 3C are discharged again onto the collecting conveyor 5 and downstream. transport. Among these series of operations, the cutting feeders 4A to 4C provided in the input hoppers 1A to 1C make the opening and closing operations variable speed by the speed control devices 10A to 10B, but the speed setting is performed in advance by the operator before the operation. Done by. The operation is started by turning on the selection switch 11 of the speed control device 10 shown in FIG.
By this closing operation, the ON / OFF command 17 is output through the "ON" of the selection judgment circuit 12, and the feeder contactor 8 is closed. On the other hand, in the case of "ON" described above, the speed setting is performed by the cut-out speed setting device 13 in advance, so the set value SV is given to the comparison circuit 14. The comparison circuit 14 drives the feeder motor 6 based on the speed command from the speed command circuit 15 given through the variable speed main circuit 7. The rotation speed is detected by the speed detector 18 and given to the comparison circuit 14 as a feedback signal PV. The comparison circuit 14 outputs the speed setting value MV to form a known speed feedback circuit. When the feeder motor 6 is driven, the cutting feeder 4 rotates and discharges the transported object 3 onto the collecting conveyor. The speed control command of the feeder motor 6 is provided as the speed control devices 10A to 10C for each of the input hoppers 1A to 1C. Therefore, the operator enters the input hoppers 1A to 1C.
The operation is performed while adjusting the set value of the cutting speed setting device 13 while monitoring the storage amount inside and the movements of the input trucks 2A to 2C. That is, if the storage amount in the input hoppers 1A to 1C decreases, the output speed of the input feeders 2A to 2C is increased and the cutting feeders 4A to 4C are controlled to reduce the cutting speed.

[Problems to be Solved by the Invention]

Since the conventional hopper material cutting device is configured as described above, the operator always pays close attention to the storage amount of the transported goods in the hopper from the relationship between the input amount and the set cutting amount, and sets the cutting speed setting device. There is a problem that it is difficult to operate a plurality of cutting devices at the same time and the operation is very troublesome because the amount of cutting from the cutting feeder must be monitored and operated clearly. The present invention has been made to solve the above problems, and when the cutting speed setting device gives a speed command to the feeder motor in advance and the operation is started, thereafter, according to the storage amount of the transported object in the input hopper. It is an object to obtain a hopper material cutting device capable of automatically changing a speed set value.

[Means for Solving the Problems]

The hopper material cutting device according to the present invention is provided with a heavy load deforming member that reacts to the storage amount of a transported object in the lower part of the input hopper, and detects the deformation amount of the heavy load deforming member by the storage amount detecting means in the hopper, A rotation speed signal of the feeder motor corresponding to the electric signal output from the storage amount detecting means in the hopper is generated by the correction signal generator. Then, the rotation speed signal of the correction signal generator and the setting signal of the cutting speed setting device are input to a comparison circuit to output the speed setting value of the feeder motor.

[Action]

The storage amount of transported material in the input hopper of the present invention is the amount of deformation of the heavy-weight deformation member as the storage amount detecting means in the hopper,
For example, it is detected by a load cell and converted into an electric signal,
The electric signal is input to the correction signal generator to output the rotation speed signal of the feeder motor, and also input to the comparison circuit together with the setting signal of the cutting speed setting device to output the speed setting value of the feeder motor.

Examples of the invention

An embodiment of the present invention will be described below with reference to the drawings. In the figure,
The same parts as those in FIG.
In FIG. 1A, 19 is a load cell as a storage amount detecting means in the hopper provided in the charging hopper 1, 20 is a signal generator for converting the output signal from the load cell 19 into an electric signal and transmitting the electric signal, and 21 is a correction signal. In the generator, the rotation speed N (vertical axis) of the feeder motor 6 is corrected by the hopper level L on the horizontal axis as shown in FIG. 22 is the cutting speed setting device 13
And a correction signal generator 21 for generating a speed set value SV, and a reference numeral 25 is a heavy-weight deformable member that responds to the stored amount of the transported object, for example, the weight. Next, the operation will be described. First, as an initial setting, the operator sets a cutting speed set by the cutting speed setting device 13 which is considered to be appropriate from the estimated storage amount in the charging hopper 1. Next, when the selection switch 11 is turned on and started, the load cell 19 which grasps the stored amount of the transported object in the input hopper 1 as a weight value outputs an electric signal proportional to the stored amount. Here, as shown in FIG. 1 (c), the load cell 19 is, for example, a heavy-weight deformable member 25 that deforms in proportion to the storage amount.
Is provided on the wall surface in the vicinity of the cutting feeder 4, the degree of deformation of the heavy load deforming member 25 is detected by the load cell 19, and is converted into a weight-electric signal via the signal generator 20. Further, the correction signal generator 21 gives the output signal of the load cell 19 because the relationship between the level L of the stored material in the input hopper 1 and the rotation speed of the feeder motor 6 is given as shown in FIG. 1 (b). When it is large, that is, when the hopper level L is high L _H , in addition to the value set by the operator, the number of revolutions of the feeder motor 6 outputs an output signal from the correction signal generator 21 to the comparison circuit 22 so that it becomes even faster. To do. On the contrary, when the output signal of the load cell 19 is small, the hopper level L is judged to be low L _L, and the speed command circuit 15 is supplied to the speed command circuit 15 via the comparison circuits 14 and 22 so that the rotation speed N becomes lower than the value set by the operator. A signal is given to automatically control the variable speed main circuit 7. In the above embodiment, the weight of the transported material 3 in the hopper is grasped by the load cell 19 as the size of the stored amount and the variable speed main circuit 7 of the feeder motor 6 is controlled. However, the present invention is not limited to this. The internal storage level may be directly detected by a depth sensor or the like, and the detected signal may be used to control the rotation speed. In addition, the actual operation status is performed by a monitoring device provided separately, but the description thereof is omitted in this example.

【The invention's effect】

As described above, according to the present invention, the setting signal from the cutting speed setting device is set as the input command condition to the speed command circuit for controlling the speed of the cutting feeder motor when the material is cut out in the loading hopper, and the transportation is performed. Since two rotation speed signals of the feeder motor output from the correction signal generator corresponding to the output from the storage amount detecting means in the hopper in proportion to the storage amount of the object are adopted, the operator can perform a rough speed setting operation. On the other hand, the feeder motor has the effect of automatically controlling and outputting the ideal number of revolutions proportional to the storage amount, and performing highly efficient material cutting. Further, since the feeder motor is automatically given the number of revolutions, the operator can operate a plurality of material cutting devices in parallel by decelerating and stopping when the storage amount becomes small.

[Brief description of drawings]

FIG. 1 (a) is a cutting device control diagram according to an embodiment of the present invention, FIG. 1 (b) is a relationship diagram between a hopper level and a feeder motor rotation speed, and FIG. 1 (c) is a schematic diagram of load cell mounting, FIG. 2 (a) is a control diagram of a conventional cutting device, and FIG. 2 (b) is a block configuration diagram of a speed control device. In FIG. 1, 1 is a loading hopper, 3 is a transported material, 4 is a cutting feeder, 6 is a feeder motor, 13 is a cutting speed setting device, and 14
Is a comparison circuit, 19 is a load cell (a storage amount detecting means in the hopper), 20 is a signal generator, 21 is a correction signal generator, 22 is a comparison circuit, and 25 is a heavy load deforming member. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A hopper material cutting device having a cutting speed setting device for setting the speed of a feeder motor, and a cutting feeder for driving and discharging the transported material stored in a feeding hopper which is driven and controlled by the feeder motor. A heavy-weight deformable member that is provided in the lower part of the input hopper in the vicinity of the cutting feeder and that reacts to the storage amount of the transported object, and a storage amount detecting means in the hopper that detects and outputs the deformation amount of the heavy-weight deformable member. A correction signal generator for outputting a rotation speed signal of the feeder motor corresponding to the storage amount detected by the storage amount detecting means in the hopper, an output signal of the correction signal generator and the cutting speed setting device. A hopper material cutting device provided with a comparison circuit for comparing output signals and outputting a speed set value of a feeder motor.