JP2001289701A - Weighing feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weighing feeder having disturbance-resistant driving signals, variable data or the like, and capable of quantitative feeding by a steady operation. SOLUTION: This weighing feeder is composed of a feeder body 20 and an operation panel 30. The feeder body 20 is composed of a hopper 21, a transport part 22, an actuator 23, a feeding part 24 and a frame part 25. The frame part 25 is equipped with a weighing device composed of a load cell 26. A controller 32, a drive circuit 33 and an amplifier 34 are built in the frame part 25, and one or two external communication lines 50, 51, and 52 are installed between the operation panel 30 and the feeder body 20, and a signal is digitized to improve resistance against noise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weight feeder, and more particularly to a novel improvement for improving noise resistance.

[0002]

2. Description of the Related Art Conventionally, for synthetic resin materials, food materials, or inorganic materials, powdery, granular, or fine solid materials have been supplied to a processing device such as a kneading machine for processing. . In such a machining process, in order to stabilize the operation state and keep the quality of the processed product constant,
2. Description of the Related Art It has been practiced to stabilize the operation state of a processing apparatus and supply a constant amount of raw materials. As a quantitative supply device for such a raw material, there is a gravimetric feeder that controls the quantitativeness based on the weight of the raw material stored in the supply device.

FIGS. 3 and 4 show the constructions of two typical types of heavy-duty feeders conventionally used. First
In FIG. 3 showing a conventional example, what is indicated by reference numeral 10 is a heavy-weight feeder, and the heavy-weight feeder 10 includes a feeder body 20 and an operation panel 30. The feeder main body 20 further includes a hopper 21 into which raw materials are charged, a transport unit 22 for transporting the raw materials in the hopper 21, an actuator 23 configured by a motor or a vibrator to drive the transport unit 22, The feeder 24 includes a supply unit 24 that supplies raw materials transported from the feeder 22 to a processing device (not shown) and a gantry 25 that supports the feeder body 20. This stand 25
Is provided with a weighing device including a load cell 26 for measuring the weight of the feeder main body 20 excluding the gantry 25.

The operation panel 30 includes an operation / setting device 3
1, a controller 32 connected to the operation / setting device 31, a drive circuit 33 connected to the controller 32, the controller 3
2 is connected to an amplifier 34. The drive circuit 33 applies a drive signal to the actuator 23 of the feeder main body 20 by an analog signal 41. The amplifier 34 receives the weighing value data from the load cell 26 of the feeder main body 20 by an analog signal 42.

In the second conventional example shown in FIG. 4, an amplifier 34 constituting the operation panel 30 in the first conventional example shown in FIG. 3 is moved to the gantry 25, and the load cell 26 is mounted on the gantry 25. It is incorporated with. As a result, the measurement value data 26a of the load cell 26 is applied as an analog signal 43 from the amplifier 34 to the controller 32 of the operation panel 30 via the amplifier 34.

[0006] The operation of the weight type feeder 10 shown in Figs. 3 and 4 configured as described above will be described below. In the case of the first conventional example shown in FIG. 3, in the feeder body 20, raw materials are put into a hopper 21, and
3 is activated by the analog signal 41 and drives the transport unit 22. Further, the load cell 23 measures the total weight of the raw materials stored in the feeder body 20 and the hopper 21 excluding the gantry 25, and the raw materials in the hopper 21 are sequentially transported by the transport unit 22 to the supply unit 24, A predetermined amount of raw material is extruded from the tip of 24 and supplied to a processing device (not shown).

On the operation panel 30, the operation / setting device 3
In 1, the operation condition of the feeder body 20 is set and the operation is performed. The set value of the operation condition set in the operation / setting device 31 is transmitted from the drive circuit 33 via the controller 32 by the operation operation to the feeder body 20. Is applied as a drive signal composed of the analog signal 41 to the actuator 23. This analog signal 41 allows the actuator 2
3 drives the transport unit 22 with a controlled driving force, and
2 is controlled to transport a predetermined fixed amount of raw material.

During this time, the raw materials are supplied to the hopper 21
When the storage amount in the tank gradually decreases and becomes small, supply is performed for continuous supply. The load cell 26
Weigh the decreasing weight during intermittent raw material replenishment,
The measured value data is applied to the amplifier 34 as an analog signal 42 from time to time. The amplifier 34 to which the analog signal 42 is applied applies the measurement value data to the controller 32,
The controller 32 calculates the supply amount from the decreasing change of the measured value data, compares the calculated value of the supply amount with the set value of the supply amount output from the operation / setting device 31, and when an error occurs,
A correction value for correcting the error is applied to the drive circuit 33. The drive signal corrected by the correction value is transmitted from the drive circuit 33 to the actuator 23 by the analog signal 41.
And the driving state of the actuator 23 is corrected, and the supply amount of the feeder body 20 is reduced by the operation / setting device 31.
Is corrected to the predetermined fixed amount supplied.

In the second conventional example shown in FIG. 4, the weighing value data 26a of the load cell 26 in the first conventional example shown in FIG. 3 is first applied to an amplifier 34 incorporated in a weighing device in a gantry 25, From the amplifier 34 to the operation panel 3
The only difference is that the analog signal 43 is applied to the 0 controller 32 by the analog signal 43, and the operation is the same as that of the first conventional example, so that the description is omitted here.

[0010]

The conventional heavy-duty feeder is configured as described above, and therefore has the following problems. That is, the feeder main body constituting the weight type feeder and the panel for controlling the drive of the feeder main body are separated and the feeder main body and the panel are connected by the analog signals 41, 42 and 43, so that the analog signal is transmitted. Noise due to disturbance easily enters the cable, errors tend to occur in the drive signal and the measured value data, and the steady operation of the feeder main body, that is, the stability of the fixed amount supply is often hindered. Further, the operating state of the processing apparatus is not stable, and the quality of the processed product may not be uniform.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In particular, an amplifier, a controller, and a drive circuit are provided on a gantry, and a disturbance is generated by converting a communication line into a digital signal. It is an object of the present invention to provide a heavy-duty feeder which is improved in noise resistance which is not affected by noise.

[0012]

A weight-type feeder according to the present invention comprises a feeder body and an operation panel. The feeder body includes a hopper into which raw materials are charged, and a transport unit for transporting the raw materials in the hopper. An actuator that drives the transport unit, and a supply unit that supplies the raw material from the transport unit to a processing device,
The feeder body is supported by a gantry, and the gantry is a weight-type feeder having a configuration in which a weighing device for measuring the weight of the feeder main body is provided. A drive circuit for driving the actuator connected thereto, the amplifier, the controller and the drive circuit are provided in the gantry, only the operation panel is provided outside the gantry, and the operation panel Only the controllers are connected by an external communication line, and are constituted by a feeder main body and an operation panel. The feeder main body includes a hopper into which raw materials are charged, and a transport for transporting the raw materials in the hopper. Unit, an actuator that drives the transport unit, and a supply unit that supplies the raw material from the transport unit to a processing device. A weight type feeder having a configuration in which the feeder main body is supported by a gantry portion and a weighing device for measuring the weight of the feeder main body is provided on the gantry portion, wherein an amplifier connected to the weighing device is provided. And a drive circuit for driving the actuator is provided on the gantry, and a controller for connecting the amplifier and the drive circuit is provided on the operation panel, between the amplifier and the controller and between the amplifier and the controller. Only the controller and the drive circuit are connected by an external communication line, and the external communication line uses a digital communication signal.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a weight feeder according to the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a weight type feeder showing a first embodiment according to the present invention, and FIG. Among them, the same or equivalent parts as those in the conventional example will be described using the same reference numerals. In FIG. 1, what is indicated by reference numeral 10 is a weight-type feeder, and the weight-type feeder 10 includes a feeder body 20 and an operation panel 30. The feeder body 20 includes a hopper 21 into which raw materials are further input, and a transport unit 2 that transports the raw materials in the hopper 21.
2. An actuator 23 configured by a motor or a vibration device to drive the transport unit 22, supports a feed unit 24 that supplies raw materials transported from the transport unit 22 to a processing device (not shown), and supports the feeder body 20. The gantry 25 is configured.

The gantry 25 is provided with a weighing device constituted by a load cell 26 for measuring the weight of the feeder body 20 excluding the gantry 25. The weighing device is connected to the load cell 26. An amplifier 34, a controller 32 connected to the amplifier 34, and a drive circuit 33 controlled by the controller 32 are incorporated. The drive circuit 33 is connected to the actuator 23. On the other hand, the operation panel 30
The operation / setting device 3 comprises an operation / setting device 31.
Reference numeral 1 is connected to the controller 32 by an external communication line 50 for transmitting a digitalized operation / setting signal.

Next, the operation will be described. First,
In the operation panel 30, the operating conditions such as the supply amount are set in the operating / setting device 31, and then the operating / setting device 31 is operated while the raw materials are charged and stored in the hopper 21, and the operating conditions are set. The set value and the operation / setting signal of the operation start operation are applied to the controller 32 via the external communication line 50 as digital communication signals. In this controller 32, operation and
According to the operation / setting signal received from the setting device 31, a predetermined drive signal is transmitted through the drive circuit 33 to the actuator 23.
The actuator 23 is activated, and the
Is driven under predetermined operating conditions. The raw materials in the hopper 21 are sequentially transported by the transport unit 22 to the supply unit 24,
4, and a predetermined amount of raw material is supplied to a processing device. The load cell 26 constantly measures the total weight of the raw materials stored in the feeder body 20 and the hopper 21 excluding the gantry 25.

During this time, the raw material is supplied to the hopper 21
When the storage amount in the inside gradually decreases and becomes small, it is supplied for continuous operation. This load cell 26
Weigh the decreasing weight during intermittent raw material replenishment,
The weighing value data 26a is output to the controller 32 via the amplifier 34 every moment. In this controller 32, the weighing value data 2
6a, the supply amount is calculated from the decreasing change, and the calculated value of the supply amount is compared with the set value of the supply amount output from the operation / setting device 31, and if an error occurs, a correction value for correcting the error To the drive circuit 33. The drive signal corrected by the correction value is output from the drive circuit 33 to the actuator 23, the drive state of the actuator 23 is corrected, and the supply amount of the feeder body 20 is reduced by the operation / setting device 3
It is corrected to a predetermined fixed supply amount set to 1.

In the weight type feeder 10 shown in FIG.
Since the controller 32, the drive circuit 33, and the amplifier 34 are incorporated into the gantry 25 of the feeder main body 20 together with the weighing device, signal wiring is concentrated inside the feeder main body 20, and noise due to disturbance can be mixed. Sex becomes very small. Further, by transmitting only the operation and setting signals as digital communication signals through the external communication line 50, it is possible to reduce the possibility that noise due to disturbance will be mixed.

In the second embodiment shown in FIG. 2, the controller 32 incorporated in the weighing device in the first embodiment shown in FIG.
Constitutes the operation panel 30 together with the operation / setting device 31, and only the external communication lines 51 and 5 are connected between the amplifier 34 and the controller 32 and between the drive circuit 33 and the controller 32.
Since the digital signal is transmitted and received after being converted into a digital signal, noise resistance is improved as compared with the related art.

In the weight type feeder 10 of the second embodiment configured as described above, the set value of the operating condition set in the operation / setting device 31 and the operation / setting signal of the operation start operation are transmitted via the controller 32. It is digitized and transmitted by the external communication lines 51 and 52, and the other components and operations between the components are the same as those in the first embodiment shown in FIG.

[0020]

According to the weight type feeder of the present invention, the following effects can be obtained by being configured as described above. In other words, the controllers are installed on the gantry side of the feeder main body, and most of the signal wiring is concentrated on the feeder main body side, so that the signal can withstand disturbance. Further, by transmitting signals between the feeder main body and the operation panel 30 by digital signals, it is possible to greatly improve noise resistance between devices.
As a result, it becomes possible to supply a constant amount of the weight type feeder by stable steady operation, stabilize the operation state of the processing equipment,
As a result, it has become possible to make the quality of processed products uniform.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a weight type feeder showing a first embodiment according to the present invention.

FIG. 2 is a configuration diagram of a weight type feeder showing a second embodiment according to the present invention.

FIG. 3 is a configuration diagram showing a first conventional example of a conventional weight type feeder.

FIG. 4 is a configuration diagram showing a second conventional example of a conventional weight-type feeder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Weight type feeder 20 Feeder main body 23 Actuator 26 Load cell (weighing apparatus) 30 Operation panel 31 Operation / setting device 32 Controller 33 Drive circuit 34 Amplifier 50,51,52 External communication line

Claims (3)

[Claims] 1. A feeder body (20) and an operation panel (30)
The feeder body (20) drives a hopper (21) into which raw materials are charged, a transport unit (22) for transporting the raw materials in the hopper (21), and the transport unit (22). An actuator (23) and a supply unit (24) for supplying the raw material from the transport unit (22) to the processing device, and the feeder body (20) is supported by a gantry (25), and the gantry is
(25) is a weight type feeder having a configuration in which a weighing device (26) for measuring the weight of the feeder body (20) is provided, wherein the weighing device (26) includes an amplifier (34) and a controller.
(32), a drive circuit (33) for driving the actuator (23), and the amplifier (34), the controller (32), and the drive circuit (33) are connected to the gantry (25). ), Only the operation panel (30) is provided outside the gantry (25), and only the operation panel (30) and the controller (32) are connected by an external communication line (50). Weight feeder characterized in that: 2. A feeder body (20) and an operation panel (30).
The feeder body (20) drives a hopper (21) into which raw materials are charged, a transport unit (22) for transporting the raw materials in the hopper (21), and the transport unit (22). An actuator (23) and a supply unit (24) for supplying the raw material from the transport unit (22) to the processing device, and the feeder body (20) is supported by a gantry (25), and the gantry is
(25) is a weight type feeder having a configuration in which a weighing device (26) for measuring the weight of the feeder main body (20) is provided, and an amplifier (3) connected to the weighing device (26) is provided.
4) and a drive circuit (33) for driving the actuator (23) are provided in the gantry (25), and the amplifier (3
A controller (32) for connecting the drive circuit (4) to the drive circuit (33) is provided on the operation panel (30), and is provided between the amplifier (34) and the controller (32) and the controller (32). ) And the drive circuit (33) are connected by external communication lines (51, 52). 3. The weight-type feeder according to claim 1, wherein a digital communication signal is used for the external communication line (50, 51, 52).