JPH04269150A - Automatic changeover device for operation mode - Google Patents

Abstract

PURPOSE:To surely select the optimum operation mode, in the case of becoming in the state of alarming, in an automatic production device. CONSTITUTION:In a automatic production device, it is composed of sensors 26a, 26b detecting the primary control limits of raw materials A, B, a ultrasonic sensor 34, etc., for an operator detection and a CPU 38 controlling the operation mode of the automatic production device by reading information from these sensors, it generates an alarm sound by energizing a speaker 42, when the sensors 26a, 26b detect the primary control limit and also detects the presence of an operation by the ultrasonic sensor 34. In the case of the operator standing by in the vicinity of the automatic production device, the operation of the device is continued, the operator of the device is suspended, if not, and the operation efficiency of the automatic production device can be increased without producing a defective product.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is an automated system in which, for example, when a production line is in a state where an alarm is generated, an operator detection sensor detects the presence or absence of an operator, and an operation mode is selected based on this presence/absence information. The present invention relates to an automatic driving mode switching device.

0002

[Prior Art] Conventionally, in this type of automated production line, there are devices that have been fully automated and can be operated unmanned, and devices that require operator assistance. For example, when the remaining amount of raw materials reaches a preset primary control limit, an alarm will be issued, and if an operator is on standby near the automatic production equipment, operation will continue, or if the equipment is unmanned, the equipment will be turned off. The operation mode was selected, such as immediately stopping operation.

[0003] In this case, the operator himself operated the manned/unmanned operator switch provided in the device.

0004

[Problem to be Solved by the Invention] However, when the operator himself/herself operates the manned/unmanned switch, erroneous operations may occur.
If the switch is operated to the unattended side even though an operator is waiting near the automatic production equipment when the next control limit is reached, the automatic production equipment will immediately stop and it will take a lot of effort to recover. It required time and money.

[0005] Furthermore, if the switch is set to the manned side even though the machine is unmanned, the automatic production equipment will stop when the final limit is reached; This results in wasted materials for the entire production line, including the next process, and requires a great deal of time and money to restore the entire automated production equipment and sort out good and defective products, resulting in damage to the entire system. There is a problem of lowering production efficiency.

The present invention is intended to overcome such conventional inconveniences, and detects the presence or absence of an operator by means of a detection means installed in the device, without the operator himself operating the manned/unmanned switch to change the operation mode. detect,
An object of the present invention is to provide an automatic operation mode switching device that can automatically switch operation modes.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an automated device including a first detection means for detecting a preset control limit, and a first detection means disposed near the device. and a control means for selecting an operation mode based on the control limit detection information of the first detection means and the operator presence/absence information of the second detection means. It is characterized by

[0008]

[Operation] In the automatic operation mode switching device according to the present invention, when the first detection means disposed in the automatic production equipment detects the primary control limit, the second detection means detects the presence or absence of an operator; Depending on the information, the control means selects an operating mode beyond the first control limit.

[0009] Therefore, the automatic production apparatus can be operated in the optimum mode without causing a mistake in switching the operation mode due to an erroneous operation of the manned/unmanned switch by the operator.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS The automatic operation mode switching device according to the present invention will be described in detail below with reference to the accompanying drawings, using an automatic extrusion molding system in which this device is installed as a preferred embodiment.

FIG. 1 shows the configuration of an automatic extrusion molding system 10. The automatic extrusion molding system 10 includes an automatic extrusion molding device 12 and an automatic operation mode switching device 14. The automatic extrusion molding apparatus 12 includes an extruder body 16, hoppers 18a, 18b, a die 20, a conveyor 22, and raw material A and B storage sections 24a, 24b.

The automatic operation mode switching device 14 is shown in FIG. The output terminals of the sensors 26a and 26b, which detect the first control limit of the remaining amount of raw materials A and B, are connected to the input terminal of the detector 28, and the sensor 30a detects the final control limit of the remaining amount of the raw materials A and B. , 30b are connected to the input ends of the detector 32, and an ultrasonic sensor 34 using a Doppler detection method is connected to a transceiver 36. Further, the I/O 40 connected to the CPU 38 is connected to the detector 28, the output terminal of the detector 32, and the transmitter/receiver 36, as well as an alarm speaker 42 and a controller (not shown) of the automatic extrusion molding device 12. .

In this case, the sensors 26a and 26b constitute a first detection means, the ultrasonic sensor 34 constitutes a second detection means, and the CPU 38 constitutes a control means.

Next, the operation of the automatic extrusion molding system 10 including the automatic operation mode switching device 14 configured as described above will be explained with reference to FIGS. 1 to 3.

In the above embodiment, the raw materials A and B transported from the storage sections 24a and 24b to the hoppers 18a and 18b are mixed in the extruder main body 16 by an agitator 19 rotated by a motor 17, and are then pressure-molded. The primary product 44 is then extruded from the die 20 onto the conveyor 22. The primary product 44 is conveyed to the next step (not shown) by the conveyor 22, and after being subjected to secondary processing such as drilling, tertiary processing such as inserting a boss is performed.

[0016] At this time, for example, if the detector 28 reads a shortage of raw material A using the sensor 26a, the detector 28 introduces this information to the CPU 38 via the I/O 40 (step S1). The CPU 38 energizes the speaker 42 via the I/O 40 and sounds an alarm sound (
Step S2), it is read by the ultrasonic sensor 34 via the I/O 40 and the transceiver 36 whether or not an operator is waiting (Step S3). If the operator is waiting near the automatic extrusion molding system 10, the operation will continue (step S4), and when the operator replenishes the raw material A (step 5), the alarm state will be canceled and the system will return to the normal operation mode. Return (step S6). However, if the raw material A is left unreplenished in step S5, when the detector 32 reads by the sensor 30a that the raw material A has reached the final control limit, the apparatus is stopped (step S7) and maintenance is performed. There will be a wait. Further, in step 3, if the ultrasonic sensor 34 reads that there is no operator waiting near the automatic extrusion molding system 10, the process skips to step S7 where the automatic extrusion molding device 12 is immediately stopped and is placed on standby for maintenance. .

In this case, by disposing the ultrasonic sensor 34 that utilizes the Doppler effect, the presence or absence of the operator can be easily and reliably detected without the operator having to switch the manned/unmanned switch himself. The automatic operation mode switching device 14 can operate the automatic extrusion molding device 12, which requires operator assistance, in an optimal state.

Next, another embodiment for reading the presence or absence of an operator will be described with reference to FIGS. 4 to 6. In this case, the same components as in the first embodiment are indicated by the same reference numerals, and detailed explanation thereof will be omitted.

FIG. 4 shows a second embodiment for reading the presence or absence of an operator. The light emitting elements 50a to 50d and the light receiving elements 52a to 52d are arranged in a planar manner in correspondence with each other, and a place where an operator waits is set between the optical axes. When the operator is waiting, the light emitting elements 50a to 5
Since the light flux emitted from 0d is blocked by the operator, the automatic operation mode switching device 14 can easily read the standby state of the operator, and the automatic operation mode switching device 14 can easily read the standby state of the operator.
As in the embodiment, the operator can select the operating mode without switching the manned/unmanned switch himself.

FIG. 6 shows a third embodiment for reading the presence or absence of an operator. In the figure, reference numerals 60 and 62 indicate light emitting elements, and reference numerals 64 and 66 indicate light receiving elements. The light emitting elements 60, 62 and the light receiving elements 64, 66 correspond to the entrance and exit of the chamber in which the automatic extrusion molding system 10 is installed, respectively. It is arranged to extend in the direction. The light emitting elements 60, 62 and the light receiving element 64,
66 and remaining amount sensors 26a and 26b of raw materials A and B
and 30a, 30b are connected to the automatic operation mode switching device 14.

In the automatic operation mode switching device 14 configured as described above, the light emitting element 60 illuminates the light receiving elements 64 and 66 when the operator enters and leaves the room.
, 62 are blocked, the passage of the operator is confirmed, and further, depending on the order in which the lights are blocked, it is possible to read whether the operator has entered or left the room. That is, when entering the room, the light receiving element 64 is first shielded from light,
Next, the light receiving element 66 is shielded from light. Furthermore, when leaving the room, the light receiving element 66 is shaded and then the light receiving element 64 is shaded, so the CPU 38 of the automatic operation mode switching device 14 reads the information on the light blocking order and determines whether or not the operator is in the room. can be confirmed. Therefore, when a situation occurs in which the remaining amount of raw material A or B reaches the primary control limit and an alarm sounds, it is possible to quickly determine whether or not the operator is in the room, and the operation mode is automatically switched. The device 14 can switch the operating mode in the automatic extrusion molding device 12.

Next, FIG. 5 shows a fourth embodiment in which the presence or absence of an operator is detected by the mat switch 70. In this embodiment, the mat switch 70 is arranged on the floor near the operating section 54 of the automatic extrusion molding device 12, and the output end of the mat switch 70 is connected to the I of the automatic operation mode switching device 14.
Connect to CPU 38 via /O40. The operator often monitors the production status of the automatic extrusion system 10 on the mat switch 70, and
When the remaining amount reaches the primary control limit, whether or not an operator is waiting near the automatic extrusion molding system 10 can be read from the conduction information of the mat switch 70.

As in the above embodiment, a human body detection sensor is disposed near the automatic extrusion molding system 10 to detect whether or not an operator is on standby, so the operator does not have to operate the manned/unmanned switch himself. There is no. Therefore, due to erroneous operation of the manned/unmanned switch, the automatic extrusion molding device 12
It is possible to drive in an appropriate driving mode without making a mistake in selecting the driving mode.

[0024]

[Effects of the Invention] According to the automatic operation mode switching device according to the present invention, the following effects can be obtained.

[0025] By providing the second detection means for detecting the presence or absence of an operator, the automatic production apparatus can be operated in an optimal mode since there is no possibility of erroneous setting of the operating mode by the operator himself.

[0026] Therefore, the automatic production device does not produce defective products and can stably produce high-quality products.

[0027] Furthermore, since the automatic production apparatus does not have to be stopped when unnecessary and a large amount of time and labor costs are spent on starting it up, the operating efficiency of the automatic production apparatus can be improved.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an automatic extrusion molding system equipped with an automatic operation mode switching device according to the present invention.

FIG. 2 is a configuration diagram of main parts of an automatic operation mode switching device according to the present invention.

FIG. 3 is a flowchart showing the operation of the automatic driving mode switching device according to the present invention.

FIG. 4 shows a second embodiment of the human body detector of the automatic driving mode switching device according to the present invention.

FIG. 5 shows a third embodiment of the human body detector of the automatic driving mode switching device according to the present invention.

FIG. 6 shows a fourth embodiment of the human body detector of the automatic driving mode switching device according to the present invention.

[Explanation of symbols]

10...Automatic extrusion molding system 12...Automatic extrusion molding device 14...Automatic operation mode switching device 18a, 18b...Hopper 24a, 24b...Storing section 26a, 26b, 30a, 30b...Sensor 28, 32...
Detector 34...Ultrasonic sensor 36...Transmitter/receiver 38...CPU 40...I/O 50a to 50d...Light emitting elements 52a to 52d...Light receiving elements 60, 62...Light emitting elements 64, 66...Light receiving element 70...Mat switch

Claims (1)

[Claims] Claims: 1. An automated device, comprising: a first detection means for detecting a preset control limit; a second detection means for detecting the presence or absence of an operator disposed near the device; An automatic operation mode switching device comprising: control means for selecting an operation mode based on control limit detection information of the first detection means and operator presence/absence information of the second detection means.