CN201815604U

CN201815604U - Personal safety protection device for punch equipment

Info

Publication number: CN201815604U
Application number: CN2010205760412U
Authority: CN
Inventors: 黄冬来
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-10-26
Filing date: 2010-10-26
Publication date: 2011-05-04
Anticipated expiration: 2020-10-26

Abstract

The utility model relates to a personal safety protection device for punch equipment, comprising an infrared transmitting circuit, an infrared receiving circuit and a control circuit, wherein the infrared transmitting circuit comprises infrared light-emitting diodes (LEDs) and an oscillator; the third output end of the oscillator directly drives the three infrared LEDs (VD1-VD3) to work; the infrared receiving circuit mainly comprises three phototransistors (VT1-VT3) and four operational amplifiers IC3; and a cophase comparator IC3-3 outputs the cophase control signal XT and a reversed-phase comparator IC3-4 outputs the reversed-phase control signal in order to control a stop electromagnet Y. The device has the following beneficial effects: the photo sensor is adopted as the sensitive element for detecting whether the hands and other parts of the bodies of the workers leave the dangerous zones, if no, the punch is immediately subjected to brake stop; and the device also has the function of circuit fault self-checking, and once the protective circuit has fault, the device can not only timely transmit the fault warning signal, but also automatically lock the punch, so that the workers can not start the punch, thus radically solving the problem of unsafety caused by circuit fault.

Description

The punching apparatus personal safety protector

Technical field

The utility model relates to the safety device field, particularly a kind of punching apparatus personal safety protector.

Background technology

Along with industrial expansion, Sheet Metal Forming Technology and goods thereof occupy critical role in industrial production, it has the efficient height, quality is good, in light weight and low cost and other advantages, therefore at automobile, electrical equipment, be used widely in the production division such as instrument and commodity, and the equipment that is adopted in the punching production mainly is punch press, Sheet Metal Forming Technology is that hardware occupies critical role in industrial production, slider of punch number of strokes height. operation is frequent, action repeats, add the influence of noise and vibration, the operator is very easily tired, and when punch press was worked, the workman just had the possibility that has an accident unless you give your whole attention to it.

The most positive clutches that adopt of the punch press of China, it is simple in structure, with low cost and do not need the advantage of source of the gas that positive clutch has, but adopt the punch press of positive clutch near top dead-centre, to stop, can not when slide block down, carry out brake hard, therefore be difficult to keep the safety in production, the external friction clutches that adopt solve this problem more.But at the cost and the cost of use of China's consideration equipment, the particularly punch press of existing hundreds of thousands platform, adopt the punch press of positive clutch all not discard, therefore to the transformation of punch press, make its adapt to photoelectricity safety guard, the assurance requirement of safe production.

The many units of China are studied the safety in production of punch press, many safety devices occurred.What occur the earliest is mechanical safety device, as fence type safety device, handle type safety device and pull-out guard etc.This type of apparatus structure is simple, but makes troubles to the operator, and influence is produced, so use few.Thereafter. the photoelectric safety device of a defencive function occurred having, when promptly hand placed die point (hereinafter to be referred as die orifice), the light signal was interdicted, and punch press just can not start, and played certain safeguard protection effect.But after punch press started, promptly slide block was strayed into die orifice as hand in descending process, and punch press can not stop in emergency, and also can produce and hinder the hand accident, and therefore the security of this device is still unreliable.

The utility model content

The purpose of this utility model provides a kind of optical sensor that adopts as the hand of surveying the workman and the sensing element whether other position of health leaves the hazardous area; if detect in one's hands and other position when not leaving the hazardous area; photoelectric protector moves immediately, makes the punch press punching apparatus personal safety protector of Brake stop immediately.

The technical scheme that the utility model adopted is such: a kind of punching apparatus personal safety protector; by infrared emission; infrared reception; control circuit three parts are formed; described infrared emission circuit comprises infraluminescence pipe and oscillator; the 3rd output of oscillator directly drives three infrarede emitting diode VD1-VD3 work; described infrared receiving circuit mainly is made up of three phototriode VT1-VT3 and four high guaily unit IC3; optical signal is input to IC3-2 and carries out gating relatively after backward crossover stream amplifier IC3-1 amplifies; gating signal is taken from the A output of oscillator; through VD4; after the detection of VD5 multiplication of voltage; detect the high-low level that C is ordered; through export homophase control signal XT with phase comparator IC3-3; export anti-phase control signal XF through anti-phase comparator IC3-4; described control circuit is under the effect of control signal XT and XF; transistor VT4 and VT5 drive relay K 1 and K2 work respectively, by contact K1-2 and the just controlled prevention motor magnet of the K2-2 Y of K1 and K2.

Constitute the stroke interlock circuit by light emitting diode VD11, VD14 and travel switch XS, when drift is up, switch XS is in closure state, light emitting diode VD11 and VD14 are by switch XS earth-continuity, relay K 1 keeps energising work, K2 keeps not working the control of uncontrolled signal XT and XF; And be in protection during stroke when drift is descending, and switch XS disconnects, and light emitting diode diode VD11 and VD14 end, and the relay road is controlled by control signal; This moment is control signal XT=0, XF=1 if the generation human body shuts out the light, and VT4 does not work by K1, and its contact K1-2 keeps normally off, and the VT5 conducting, K2 work, its contact K2-2 is in off-state. and Breake Electromagnet Y does not work, and the braking punch press is out of service.

Be provided with the fault self-checking control circuit in the described control circuit, the start-up circuit that the fault self-checking control circuit is made of press button QS and relay K 4, after connecting general supply, press start button QS, then relay K 3 is by the closure of K1-1 normally opened contact, the K2-1 normally-closed contact, K4 normally-closed contact and QS and electric work, and self-locking by the closure of its contact K3-1, meanwhile relay K 4 is also through R26, C14 delay time electric work, its contact K4-1 cuts off the start-up circuit of relay K 3, when the circuit operate as normal, relay K 3 and K4 are all in running order, and diode VD14 is owing to instead ending partially, and alarm lamp VD16 does not work.

Described oscillator adopts 555 time-base integrated circuits, and connects 7812 mu balanced circuits, and the 2nd pin output of 7812 mu balanced circuits connects a weakening capacitor C 4, the 3 pin outputs and connects capacitor C5.

By adopting the aforementioned techniques scheme; the beneficial effects of the utility model are: this device adopts optical sensor as the hand of surveying the workman and the sensing element whether other position of health leaves the hazardous area; if detect in one's hands and other position when not leaving the hazardous area; photoelectric protector moves immediately; make punch press Brake stop immediately; and establish by the fault self-checking function; when in a single day holding circuit breaks down; can not only in time send the failure warning signal; and can also the automatic blocking punch press; the workman then can't restart punch press, and this can fundamentally solve the malfunctioning unsafe problems of bringing of holding circuit.

Description of drawings

Fig. 1 is the operation principle block diagram of the utility model embodiment;

Fig. 2 is the circuit theory diagrams of the utility model embodiment.

The specific embodiment

Further specify the utility model below in conjunction with the drawings and specific embodiments.

As shown in Figure 1 and Figure 2, a kind of punching apparatus personal safety protector, form by infrared emission, infrared reception, control circuit three parts, described infrared emission circuit comprises infraluminescence pipe and oscillator, the 3rd output of oscillator directly drives three infrarede emitting diode VD1-VD3 work, described infrared receiving circuit mainly is made up of three phototriode VT1-VT3 and four high guaily unit IC3, and VT1-VT3 quits work when VD1-VD3, VT1-VT3 dial in shading; On the contrary, VT1-VT3 work when VD1-VD3, VT1-VT3 dial at printing opacity.Optical signal is input to IC3-2 and carries out gating relatively after backward crossover stream amplifier IC3-1 amplifies, gating signal is taken from the A output of oscillator IC1, when the A point is high level, light emitting diode ends, the inverting input of IC3-2 is a high level, its output is clamped at low level, even at this moment the in-phase input end of IC3-2 has interfering signal also can't pass through.When the A point is low level, light emitting diode conducting work, the inverting input of IC3-2 just can be set up normal comparative voltage, and when having only the optical signal amplitude greater than this comparative voltage, IC3-2 just exports high level, thereby reaches the purpose that suppresses spurious signal.Under the situation that infrared light does not block, the IC3-2 comparator is exported a series of positive pulse signals, sets up high level through VD4, the detection of VD5 multiplication of voltage at the C point, and this moment is with phase comparator IC3-3 output homophase control signal XT=1.Anti-phase comparator IC3-4 exports anti-phase control signal XF=0.When infrared light was subjected to shield, photosignal disappeared, and C point becomes low level, and it is anti-phase that two comparators are exported control signal, i.e. XT=0, XF=1.Under the effect of control signal XT and XF, transistor VT4 and VT5 drive relay K 1 and K2 work respectively.Because relay K 3 has been in running order when circuit is started working, therefore contact K1-2 and the just controlled prevention motor magnet of the K2-2 Y by K1 and K2.

For guarantee drift during up get material, feeding process operations holding circuit when shutting out the light is not worked, the VD11 that is provided with in the circuit, VD14 and travel switch XS formation stroke interlock circuit.When drift was up, XS was in closure state, and VD11 and VD14 are by the XS earth-continuity, and relay K 1 keeps energising work, and K2 keeps not working the control of uncontrolled signal XT and XF.And be in protection during stroke when drift is descending, and XS disconnects, and VD11 and VD14 end, and the relay road is controlled by control signal.Circuit enters guard mode.This moment is control signal XT=0, XF=1 if the generation human body shuts out the light, and VT4 does not work by K1, and its contact K1-2 keeps normally off; and the VT5 conducting, K2 work, its contact K2-2 is in off-state. and Breake Electromagnet Y does not work; and the braking punch press is out of service, plays a protective role.

Circuit in the circuit behind the self-recification all belongs to direct-coupled circuit, and wherein arbitrary level breaks down. and the capital directly influences the operate as normal of relay K 1 and K2.Be provided with the fault self-checking control circuit in the described control circuit, automatic failure detection circuit is provided with for judging whether these circuit are out of order, self check relay K 3 is used for realizing the fault judgement, the start-up circuit that the fault self-checking control circuit is made of press button QS and relay K 4, after connecting general supply, press start button QS, then relay K 3 is by the closure of K1-1 normally opened contact, the K2-1 normally-closed contact, K4 normally-closed contact and QS and electric work, and self-locking by the closure of its contact K3-1, meanwhile relay K 4 is also through R26, C14 delay time electric work, its contact K4-1 cuts off the start-up circuit of relay K 3, is working under the condition of self-locking reliably to guarantee K3.When the circuit operate as normal, relay K 3 and K4 are all in running order, and diode VD14 is owing to instead ending partially, and alarm lamp VD16 does not work.

Described oscillator adopts 555 time-base integrated circuits, because the comparator sensitivity of 555 time-base integrated circuit inside is higher, and employing difference channel form, its frequency of oscillation is subjected to supply voltage and influence of temperature variation very little, when 3 pin of 555 time-base integrated circuits are output as high level, light emitting diode ends, when 3 pin are output as high level, and light emitting diode conducting work.555 time-base integrated circuits connect 7812 mu balanced circuits; 7812 inside is provided with overcurrent protection, chip overheating protection and adjusts pipe safety operation area holding circuit; owing to have esy to use, safe and reliable, stable performance and advantage such as cheap; the 2nd pin output of 7812 mu balanced circuits connects a weakening capacitor C 4; the 3rd pin output connects capacitor C5; be used to offset the inductive effect of input line when longer, produce self-oscillation to prevent circuit.

More than show and described basic principle of the present utility model and principal character and advantage thereof; the technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the explanation just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. punching apparatus personal safety protector, it is characterized in that: by infrared emission, infrared reception, control circuit three parts are formed, described infrared emission circuit comprises infraluminescence pipe and oscillator, the 3rd output of oscillator directly drives three infrarede emitting diode VD1-VD3 work, described infrared receiving circuit mainly is made up of three phototriode VT1-VT3 and four high guaily unit IC3, optical signal is input to IC3-2 and carries out gating relatively after backward crossover stream amplifier IC3-1 amplifies, gating signal is taken from the A output of oscillator, through VD4, after the detection of VD5 multiplication of voltage, detect the high-low level that C is ordered, through export homophase control signal XT with phase comparator IC3-3, export anti-phase control signal XF through anti-phase comparator IC3-4, described control circuit is under the effect of control signal XT and XF, transistor VT4 and VT5 drive relay K 1 and K2 work respectively, by contact K1-2 and the just controlled prevention motor magnet of the K2-2 Y of K1 and K2;

2. punching apparatus personal safety protector according to claim 1; it is characterized in that: be provided with the fault self-checking control circuit in the described control circuit; the start-up circuit that the fault self-checking control circuit is made of press button QS and relay K 4; after connecting general supply; press start button QS; then relay K 3 is by the closure of K1-1 normally opened contact; the K2-1 normally-closed contact; K4 normally-closed contact and QS and electric work; and self-locking by the closure of its contact K3-1; meanwhile relay K 4 is also through R26; C14 delay time electric work; its contact K4-1 cuts off the start-up circuit of relay K 3; when the circuit operate as normal; relay K 3 and K4 are all in running order; diode VD14 is owing to instead ending partially, and alarm lamp VD16 does not work.

3. punching apparatus personal safety protector according to claim 1; it is characterized in that: described oscillator adopts 555 time-base integrated circuits; and connecting 7812 mu balanced circuits, the 2nd pin output of 7812 mu balanced circuits connects a weakening capacitor C 4, the 3 pin outputs and connects capacitor C5.