CN2559474Y

CN2559474Y - Safety door opening & closing detecting apparatus for injection moulding machine

Info

Publication number: CN2559474Y
Application number: CN 02266586
Authority: CN
Inventors: 潘晓彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-23
Filing date: 2002-08-23
Publication date: 2003-07-09
Anticipated expiration: 2012-08-23

Abstract

The utility model discloses an injection molding machine safety door switching detector, which comprises a SCM 1, a safety door probe 3, a code memory 4, a signal amplifier 5, an acoustic and optical warning device 6 and a crystal oscillator 7 corresponding led out from pins of the SCM. Wherein, the safety door probe 3 is arranged with a safety door probe TP. A resistance R2 is connected between the safety door probe and a corresponding pin of the SCM 1. A resistance R1 is positioned at a contact between the resistance R2 and a corresponding pin of the SCM 1 and connected with a power source VCC. An information button 2 contacting with or isolating from the safety door probe is arranged in a corresponding position of the safety door probe and fixed on a sliding injection molding machine safety door. The safety door probe contacts the information button to read corresponding code information. Thus, the code memory compares the acquired code information with codes in the code memory. As for different code, the SCM drives the acoustic and optical warning device to remind injection molding operators to close the safety door. As to identical code, the SCM emits signals to close the safety door. The signal is processed by the signal amplifier for an injection molding control system to verify whether the safety door has been reliably closed.

Description

A kind of injection machine safety door switch checkout gear

Technical field

The utility model relates to a kind of checkout gear of door switch, relates in particular to a kind of injection machine safety door switch checkout gear based on the information button.

Technical background

The checkout gear technology of existing door switch; as Granted publication day be on May 28th, 1997; the mandate publication number is that the Chinese utility model patent of CN2254947Y discloses " a kind of safe contactor control device of electric iron rolling door "; the main base that is provided with a tool chute in the bottom of iron rolling door; in sheathed several pressure-detecting devices of the central chute of this base; be arranged in the movable post below of this device with rope; and articulate a pull switch; when making electric iron rolling door in descending, touch bar; because of pressure changes; movable post is pressed down rope; and the pulling pull switch; to trigger a transmitter; transmit a signal to main frame, the moment counter-rotating of control electro-motor also stops operating, and reaches the effect of iron rolling door safeguard protection; and this remote controller is provided with weak electricity measuring and system testing circuit; can when transmitter power deficiency or fault, make main frame produce the warning sound or light, to guarantee the safe handling of iron rolling door in good time.Its advantage then can stop action immediately for falling when meeting human body or other barriers in the process in that iron gate is slow, plays the safeguard protection effect with this.But its design range of application is limited, obviously can not use to the injection machine safety door, and its design can be used for reference.And for example open day be that the Chinese invention patent that July 19, publication number in 2000 are CN1260537A discloses " intelligent detecting method of switch production and checkout gear ", it is a utilization of the auxiliary observing and controlling aspect of microcomputer.Utilize single-chip microcomputer as the control core, utilize it to produce digital scanning signal, be added to the contact of switch to be checked after driving amplification, isolation, if utilize inner connection arranged between contact, its level will be pulled to these characteristics of same level as detecting the principle foundation; The analog level height; And utilize output driving circuit to connect output and isolate, detection amplification and input are isolated and input circuit constitutes the realization of detection principle hardware; The utilization vibration judges that subprogram, gear change the judgement subprogram, the result judges that subprogram, transition judgement subprogram constitute the software approach basis of detecting; Thereby design the switch intelligent detection device.But there is it to use limitation, is only applicable to switch, but can not use door switch.And existing injection machine safety door switch detects and judges and be mostly to be installed in limit switch on the injection moulding frame by employing whether closure realizes that security of this kind method and reliability are all poor; This is because the easily illegal simulation travel switch of injection machine operator signal, the illusion that causes the injection machine safety door to close, thus cause the frequent generation of accident.

Summary of the invention

The utility model is at the deficiency of above-mentioned door switch existence and the hidden danger of injection machine safety door switch detection method existence, technical problem to be solved is on the basis of original technology, adopt the detection method of contact code identification, a kind of not only safety but also reliable injection machine safety door switch checkout gear are provided.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: injection machine safety door switch checkout gear, comprise single-chip microcomputer and lead to safety door probe apparatus, coded stack, signal amplifier, audible-visual annunciator, crystal oscillator by this single-chip microcomputer pin correspondence, described safety door probe is installed on the fixing injection molding machine frame, and described safety door probe other end correspondence position also is provided with described safety door probe can contact or separate and is fixed on information button on the removable injection machine safety door; Described safety door probe apparatus also includes the resistance R 2 of cross-over connection between safety door probe and the described single-chip microcomputer corresponding pin, and this resistance R 2 also is connected to resistance R 1 with single-chip microcomputer corresponding pin contact place and meets power supply VCC.

Above-mentioned single-chip microcomputer adopts the PIC16C54 type single chip microcontroller as the checkout gear core, and the information button is for adopting the DS1990A type identifier as distinguishing mark, and coded stack adopts the serial EEPROM 93LC46A type memory as memory chip;

Above-mentioned signal amplifier is for to be connected to a triode P2 by the single-chip microcomputer delivery outlet through resistance R 8, and this triode P2 colelctor electrode meets power supply VCC as the output OUT of signal amplifier and through pull-up resistor R9, this triode P2 grounded emitter; Above-mentioned crystal oscillator oscillator signal output input two ends connect the single-chip microcomputer corresponding pin respectively;

Above-mentioned audible-visual annunciator includes the single-chip microcomputer corresponding pin and is connected to red light L1 through current-limiting resistance R3 and is connected with another delivery outlet of single-chip microcomputer, described pin VCC also is connected to green light L2 through current-limiting resistance R4 and is connected with another delivery outlet of single-chip microcomputer, described pin also warp is connected to triode P1 colelctor electrode with the news Chinese percussion instrument SPK that diode D1 is in parallel, this triode P1 grounded emitter, this triode P1 base stage is connected with another delivery outlet of single-chip microcomputer through resistance R 5 again;

Contact also is connected to Zener diode Z1 between above-mentioned resistance R 2 and the single-chip microcomputer corresponding pin, the other end ground connection of this Zener diode Z1, and corresponding another input port of link information button shell one termination single-chip microcomputer;

Above-mentioned single-chip microcomputer corresponding pin leads to decoupling capacitor C1; Above-mentioned crystal oscillator oscillator signal output input two ends are connected to capacitor C 2, C3 respectively, capacitor C 2 and capacitor C 3 contact place ground connection; Above-mentioned single-chip microcomputer corresponding pin also leads to pull-up resistor R6, the R7 that is in parallel, and it is good that pull-up resistor R6 and pull-up resistor R7 contact place meet power supply VCC.

Read corresponding encoded information by contacting with the information button with the safety door probe, coded stack is compared the coding of storing in the coded message that reads and the coded stack, if coded message difference, the MCU driving audible-visual annunciator is reminded injection machine operator closed safe door, if it is identical, single-chip microcomputer sends shutdown signal and notifies control system for shot machine through signal amplifier, and the authenticating security door is reliably closed.

Compared with prior art, advantage of the present utility model is: the information button that employing can't be duplicated and forge is as the safety door distinguishing mark, guarantee sign accurately and reliably, and can be installed on easily on the mobile injection machine safety door, safety door probe contact with it just can be realized reading of safety door coded message, mating reaction by single-chip microcomputer, coded stack, audible-visual annunciator and crystal oscillator, just the switching signal of the illegal simulating Safety door of injection machine operator be can prevent effectively, security and reliability that injection machine uses improved.

Description of drawings

Fig. 1 is a block diagram of the present utility model;

Fig. 2 is the electrical schematic diagram of Fig. 1 embodiment.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Fig. 1, shown in Figure 2, Fig. 1 is a block diagram of the present utility model, comprising as core devices single-chip microcomputer 1, and lead to safety door probe apparatus 3, coded stack 4, signal amplifier 5, audible-visual annunciator 6, crystal oscillator 7 by this single-chip microcomputer pin correspondence, described safety door probe TP is installed on the fixing injection molding machine frame, and described safety door probe TP other end correspondence position also is provided with described safety door probe TP can contact or separate and is fixed on information button 2 on the removable injection machine safety door;

Contact with information button 2 by safety door probe TP and to read corresponding encoded information, single-chip microcomputer 1 is compared the coded message that reads with the coding of storage in the coded stack 4, if coded message difference, single-chip microcomputer 1 drives audible-visual annunciator 6 and reminds injection machine operator closed safe door, if it is identical, single-chip microcomputer 1 sends shutdown signal through signal amplifier 5 notice control system for shot machine, and the authenticating security door is reliably closed.

Figure 2 shows that the electrical schematic diagram of Fig. 1 embodiment.Include single-chip microcomputer 1 among Fig. 2 and adopt PIC16C54 type single chip microcontroller IC1, make by U.S. MICROCHIP company as the checkout gear core, its instruction system simplifies, low in energy consumption, reliability is high; Lead to decoupling capacitor C1 between this single-chip microcomputer 1 corresponding pin VPP, VSS; This single-chip microcomputer 1 corresponding pin RB6, RB7 also lead to pull-up resistor R6, the R7 that is in parallel, and pull-up resistor R6 and pull-up resistor R7 contact place meet power supply VCC;

Information button 2 is for adopting the DS1990A type identifier IC2 as distinguishing mark, make by U.S. DALLAS company, this sign adopts global unique identifier, can't duplicate and forge forever, guarantee sign accurately and reliably, its stainless steel casing good airproof performance has characteristics such as anticorrosion, shock-resistant, no power consumption, the wearing and tearing of nothing machinery, can be installed on easily on the mobile injection machine safety door, safety door probe TP contacts with it just and can realize reading of safety door coded message; Safety door probe apparatus 3 also includes the resistance R 2 of cross-over connection between safety door probe TP and the single-chip microcomputer 1 corresponding pin RA2, and this resistance R 2 also is connected to resistance R 1 with single-chip microcomputer 1 corresponding pin contact place and meets power supply VCC; Described resistance R 2 also is connected to Zener diode Z1 with single-chip microcomputer 1 corresponding pin contact RA2 place, the other end ground connection of this Zener diode Z1, and link information button 2 shells one termination single-chip microcomputer 1 corresponding another input port TOCK1;

The serial EEPROM 93LC46A type memory IC 3 that coded stack 4 adopts as memory chip, its pin DI meets single-chip microcomputer 1 corresponding pin RB7, its pin DO meets single-chip microcomputer 1 corresponding pin RB6, its pin CLK meets single-chip microcomputer 1 corresponding pin RB5, its pin CS meets single-chip microcomputer 1 corresponding pin RB4, its pin VCC meets power supply VCC, its pin VSS ground connection;

Signal amplifier 5 includes by single-chip microcomputer delivery outlet RA1 and is connected to a triode P2 through resistance R 8, and this triode P2 colelctor electrode meets power supply VCC as the output OUT of signal amplifier and through pull-up resistor R9, this triode P2 grounded emitter;

This device audible-visual annunciator 6 includes single-chip microcomputer 1 corresponding pin VPP and is connected to red light L1 through current-limiting resistance R3 and is connected with single-chip microcomputer 1 another delivery outlet RB2; Described pin VPP also is connected to green light L2 through current-limiting resistance R4 and is connected with single-chip microcomputer 1 another delivery outlet RB1; Described pin VPP also warp is connected to triode P1 colelctor electrode with the news Chinese percussion instrument SPK that diode D1 is in parallel, this triode P1 grounded emitter, and this triode P1 base stage is connected with another delivery outlet of single-chip microcomputer RB3 through resistance R 5 again;

Crystal oscillator vibration 7 comprises that its signal output input two ends connect single-chip microcomputer corresponding pin OSC1, OSC2 two ends respectively, and these crystal oscillator oscillator signal output input two ends also are connected to capacitor C 2, C3 respectively, capacitor C 2 and capacitor C 3 contact place ground connection.

In an exemplary embodiments of this device, the reference value of element: resistance R 1 is 6.2K Ω, and R2 is 5.1K Ω, and R3 is 510 Ω, and R4 is 510 Ω, and R5 is 4.7K Ω, and R6 is 10K Ω, and R7 is 10K Ω, and R8 is 2K Ω, and R9 is 10K Ω; Capacitor C 1 is 0.1 μ f, and C2 is 30pf, and C3 is 30pf; Crystal oscillator C4 is 4MHZ; Zener diode Z1 voltage stabilizing value is 5.1V.

After the injection machine computer controller added power supply, this device started at once.

This device at first reads the safety door coded message among the serial EEPROM 93LC46A, if coded stack is not stored this information as yet, red light L1 and green light L2 light simultaneously in this device, and flash for prompting, require the operator to store coded message, promptly mobile injection machine safety door reliably contacts with safety door probe TP by information button DS1990A, triplicate, for the first time for reading coding, being check code for the second time, is memory encoding for the third time, and the code storage unit is with the coded message of this safety door of permanent recording, thereby finish the task of coded message setting first, can carry out later safety door switching information and detect.If store corresponding coding information already in the coded stack, this device will regularly detect the switch of safety door, read the information of safety door probe TP, if the information that reads conforms to information in the coded stack, this device thinks that safety door reliably closes, and green light L2 lights, red light L1 extinguishes, signal amplifier output OUT is a low level, and notice injection machine computer controller safety door shuts, and can descend the step action; Otherwise the expression safety door does not shut as yet or illegally opens, and this moment, green light L2 extinguished, and red light L1 lights, signal amplifier output OUT is a high level, news Chinese percussion instrument SPK " .. that ticks tick .. " sound alarm is closed up to the injection machine safety door, and it is normal that coded message is recovered.This device is exactly to circulate and so forth, by the method detection injection machine safety door switch of real-time contact formula code identification, avoids the closure state of the conventional travel switch of artificial simulation, improves the security and the reliability of injection machine operation with this.

Claims

1. injection machine safety door switch checkout gear, comprise single-chip microcomputer and lead to safety door probe apparatus, coded stack, signal amplifier, audible-visual annunciator, crystal oscillator by this single-chip microcomputer pin correspondence, described safety door probe apparatus includes the safety door probe TP that is fixed on the injection molding machine frame, it is characterized in that: described safety door probe TP other end correspondence position also is provided with described safety door probe TP can contact or separate and is fixed on information button on the removable injection machine safety door; Described safety door probe apparatus also includes the resistance R 2 of cross-over connection between safety door probe TP and the described single-chip microcomputer corresponding pin, and this resistance R 2 also is connected to resistance R 1 with single-chip microcomputer corresponding pin contact place and meets power supply VCC.

2. a kind of injection machine safety door switch checkout gear according to claim 1 is characterized in that: described single-chip microcomputer adopts the PIC16C54 type single chip microcontroller as the checkout gear core; Described information button is for adopting the DS1990A type identifier as distinguishing mark; Described coded stack adopts the serial EEPROM 93LC46A type memory as memory chip.

3. a kind of injection machine safety door switch checkout gear according to claim 1, it is characterized in that described signal amplifier is for to be connected to a triode P2 by the single-chip microcomputer delivery outlet through resistance R 8, this triode P2 colelctor electrode meets power supply VCC as the output OUT of signal amplifier and through pull-up resistor R9, this triode P2 grounded emitter.

4. a kind of injection machine safety door switch checkout gear according to claim 2, it is characterized in that described signal amplifier is for to be connected to a triode P2 by the single-chip microcomputer delivery outlet through resistance R 8, this triode P2 colelctor electrode meets power supply VCC as the output OUT of signal amplifier and through pull-up resistor R9, this triode P2 grounded emitter.

5. according to any described a kind of injection machine safety door switch checkout gear of claim 1 to 4, it is characterized in that described audible-visual annunciator includes the single-chip microcomputer corresponding pin and is connected to red light L1 through current-limiting resistance R3 and is connected with another delivery outlet of single-chip microcomputer; Described pin also is connected to green light L2 through current-limiting resistance R4 and is connected with another delivery outlet of single-chip microcomputer; Described pin also warp is connected to triode P1 colelctor electrode with the news Chinese percussion instrument SPK that diode D1 is in parallel, this triode P1 grounded emitter, and this triode P1 base stage is connected with another delivery outlet of single-chip microcomputer through resistance R 5 again.

6. according to any described a kind of injection machine safety door switch checkout gear of claim 1 to 4, it is characterized in that contact also is connected to Zener diode Z1 between described resistance R 2 and the single-chip microcomputer corresponding pin, the other end ground connection of this Zener diode Z1, and corresponding another input port of link information button shell one termination single-chip microcomputer.

7. a kind of injection machine safety door switch checkout gear according to claim 5, it is characterized in that contact also is connected to Zener diode Z1 between described resistance R 2 and the single-chip microcomputer corresponding pin, the other end ground connection of this Zener diode Z1, and corresponding another input port of link information button shell one termination single-chip microcomputer.

8. a kind of injection machine safety door switch checkout gear according to claim 7, it is characterized in that described single-chip microcomputer corresponding pin leads to decoupling capacitor C1, described crystal oscillator oscillator signal output input two ends are connected to capacitor C 2, C3 respectively, capacitor C 2 and capacitor C 3 contact place ground connection; Described single-chip microcomputer corresponding pin also leads to pull-up resistor R6, the R7 that is in parallel, and pull-up resistor R6 and pull-up resistor R7 contact place meet power supply VCC.