Safety interlock

Abstract

The invention discloses a safety interlock. The safety interlock comprises an inductor, an actuator, an emergency unlocking device and a connecting cable, the sensor is fixed at the immovable position of the safety door under the use condition; the right door opening actuator, the left door opening actuator, the positive actuator and the flexible actuator are fixed to the positions where the use condition safety door can be opened and closed, and when the use condition safety door is opened and closed, the right door opening actuator, the left door opening actuator, the positive actuator and the flexible actuator can be smoothly inserted into or pulled out of the inductor. The emergency unlocking device is fixed with the sensor; and the connecting cable is fixed on the inductor and provides an electric signal for the inductor. According to the invention, the bistable electromagnet is adopted, so that energy can be effectively saved; an insertion locking mode with openings in three surfaces is adopted, the problem that safety interlocking is influenced by the rotating radius of the safety door can be solved, and the device is suitable for more working conditions; the device is small in size and can be widely applied to various industrial environments, the actuator and the inductor adopt the magnetic induction technology, locking, unlocking and output are mutually verified, and safety and reliability are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of safety interlocking, and in particular to a safety interlocking. Background Art

[0002] In today's industrial safety field, many safety interlocks emerge in an endless stream, and their motion mechanisms are mostly monitored by structures similar to travel switches. The product reliability and service life are short, the locking force is small, and the energy consumption is high. The present invention is to solve the above problems and adopts an optical coupling monitoring method to monitor the product motion mechanism. Since there is no physical contact and friction between the detection mechanism and the motion mechanism, the reliability and service life of the product motion monitoring will be significantly improved. The present invention uses a bistable electromagnet to promote the locking mechanism, and needs to provide a lower pulse current at the initial start-up. Normal locking and unlocking states do not require additional electricity, which can effectively save energy. Moreover, the technology to which this invention belongs is small in size and has a wider range of applicable scenarios. The present invention adopts an insertion method with three-sided openings, which also effectively solves the influence of the rotation radius of the safety door when the safety interlock is used, which can effectively improve its applicability and is suitable for more working conditions. Summary of the invention

[0003] The purpose of the present invention is to provide a safety interlock to solve the above technical problems.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A safety interlock comprises a sensor, an actuator, an emergency unlocking device and a connecting cable; the sensor is fixed at a position where a working condition safety door cannot be moved; the actuator comprises a right door opening actuator, a left door opening actuator, a positive actuator and a flexible actuator, the right door opening actuator, the left door opening actuator, the positive actuator and the flexible actuator are fixed at a position where the working condition safety door can be opened and closed, and when the working condition safety door is opened and closed, the right door opening actuator, the left door opening actuator, the positive actuator and the flexible actuator can be smoothly inserted into or pulled out of the sensor; the emergency unlocking device is fixed to the sensor; the connecting cable is fixed to the sensor to provide an electrical signal to the sensor.

[0005] The sensor includes a housing, a metal base plate, base plate screws, emergency unlocking mounting screws, a light guide column, a copper sleeve, a wiring port circuit board, wiring port circuit board screws, a special interface, an electromagnet, an electromagnet screws, a main control circuit board, a main control board screws, a locking rod, a marble, a sensor coil, an unlocking knob, a knob waterproof ring and a top cover; The light guide column, copper sleeve, and marble are manufactured by secondary injection molding and are integrally molded with the housing. The unlocking knob is installed in the knob waterproof ring, and the unlocking knob with the knob waterproof ring installed is installed in the mounting hole on the front side of the housing. The locking rod is installed in the locking hole position inside the housing, and the electromagnet is fixed to a fixed position inside the housing by an electromagnet screw, and the electromagnet is clamped and connected with the locking rod; The dedicated interface is welded to the wiring port circuit board, and the wiring port circuit board is fixed to the installation position inside the shell by the wiring port circuit board screws, and the dedicated interface on the wiring port circuit board is exposed from the shell; the inductor coil is sleeved on the outer ring of the metal part of the marble from the inside of the shell, the top cover is assembled to the shell, and the inductor coil, the marble and the shell are fixed to form a whole by the glue filling process; The main control circuit board is fixed inside the shell by the main control board screws; the swing arm, the motion pin, the fixing pin, and the pressing block are assembled together to form a component, the reset spring is installed in the metal bottom plate, and the swing arm, the motion pin, the fixing pin, and the pressing block assembly are installed in the metal bottom plate through the reset spring, and are all fixed in the metal bottom plate with a spring cover to form a component. The metal base plate is fixed to the back of the shell by base plate screws, and the raised part of the metal base plate faces outward to form a component; the push rod waterproof ring is inserted into the flange sleeve, and the button is screwed into the thread at one end of the push rod. The push rod, flange sleeve, button, and push rod waterproof ring form an assembly emergency unlocking device. The safety interlock waterproof ring is placed at the metal base plate installation position, and the assembled push rod, flange sleeve, button, and push rod waterproof ring are fixed to the metal base plate with emergency unlocking installation screws to form a sensor.

[0006] The actuators are composed of an actuator housing, an actuator cover, an actuator coil, an actuator circuit board, a safety interlock waterproof ring, a spring cover, a pressing block, a reset spring, a swing arm, a moving pin, and a fixing pin; the actuator coil is welded to the actuator circuit board, and the two are installed together in the actuator housing, and the actuator cover is assembled to the actuator housing, pressed and fixed and bonded together by a glue filling process.

[0007] The connecting cable is fixed on the dedicated interface of the sensor. The connecting cable is integrally formed by injection molding of the cable, wire screws and a dedicated plug. The dedicated plug is welded to the cable and an injection-molded shell is formed. The wire screws are assembled to the dedicated plug to assemble the connecting cable.

[0008] The emergency unlocking device is fixed to the sensor through the emergency unlocking mounting screws; the emergency unlocking device consists of a button, a pressing rod, a flange sleeve, screws, and a pressing rod waterproof ring. The button sleeve is connected to one end of the pressing rod, and the other end of the pressing rod is installed in the flange sleeve, and a pressing rod waterproof ring is provided inside. The flange sleeve is fixed to the sensor by screws.

[0009] It also includes a plastic bottom plate and an emergency unlocking dust cover. When the emergency unlocking device is not needed, the emergency unlocking dust cover is used instead; when the emergency unlocking device is not needed, the plastic bottom plate is used instead of the metal bottom plate.

[0010] The locking mechanisms of the actuator and sensor are made of metal.

[0011] Compared with the prior art, the present invention has the following advantages: the actuator and sensor locking mechanism of the present invention are both made of metal material, which can solve the problem of insufficient locking force; the present invention adopts a bistable electromagnet, which can effectively save energy; the present invention adopts an insertion locking method with three-sided openings, which can solve the problem that the safety interlock is affected by the rotation radius of the safety door and is suitable for more working conditions; the present invention has a small size and can be widely used in a variety of industrial environments. The present invention adopts an optical coupling self-monitoring method to detect the operation of the motion mechanism, and has high safety redundancy; the actuator and sensor of the present invention adopt magnetic induction technology, and locking, unlocking and output are all verified with each other, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the assembly structure of the present invention.

[0013] Figure 2 It is a schematic diagram of the structure of the sensor (assembled with a plastic base plate) of the present invention.

[0014] Figure 3 It is a schematic diagram of the structure of the sensor (assembled with emergency unlocking dust cover) of the present invention.

[0015] Figure 4 It is a schematic diagram of the structure of the sensor (emergency unlocking device) of the present invention.

[0016] Figure 5 For the present invention Figure 4 Schematic diagram of the cross-section structure.

[0017] Figure 6 For the present invention Figure 4 Schematic diagram of the local cross-section structure.

[0018] In the figure: sensor 1, right door actuator 2, left door actuator 3, positive actuator and flexible actuator 4, emergency unlocking device 5, connecting cable 6, housing 7, plastic base plate 8, metal base plate 9, emergency unlocking dust cover 10, base plate screw 11, emergency unlocking mounting screw 12, light guide 13, copper sleeve 14, wiring port circuit board 15, wiring port circuit board screw 16, special interface 17, electromagnet 18, electromagnet screw 19, main control circuit board 20, main control board screw 21, lock rod 2 2. Marble 23, sensor coil 24, unlocking knob 25, knob waterproof ring 26, top cover 27, actuator housing 28, actuator cover 29, actuator coil 30, actuator circuit board 31, safety interlock waterproof ring 32, spring cover 33, pressing block 34, return spring 35, swing arm 36, moving pin 37, fixing pin 38, button 39, pressing rod 40, flange sleeve 41, screw 42, pressing rod waterproof ring 43, cable 44, wire screw 45, special plug 46. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] A safety interlock comprises a sensor 1, an actuator, an emergency unlocking device 5, and a connecting cable 6; the sensor 1 is fixed at a position where the safety door in the working condition cannot be moved; the actuator comprises a right door actuator 2, a left door actuator 3, a positive actuator and a flexible actuator 4, and the right door actuator 2, the left door actuator 3, the positive actuator and the flexible actuator 4 are fixed at a position where the safety door in the working condition can be opened and closed, and when the safety door in the working condition is opened and closed, the right door actuator 2, the left door actuator 3, the positive actuator and the flexible actuator 4 can be smoothly inserted into or pulled out of the sensor 1; the emergency unlocking device 5 is fixed to the sensor 1; the connecting cable 6 is fixed on the sensor 1 to provide an electrical signal for the sensor 1.

[0021] 2. A safety interlock according to claim 1, characterized in that the sensor 1 comprises a housing 7, a metal bottom plate 9, a bottom plate screw 11, an emergency unlocking mounting screw 12, a light guide column 13, a copper sleeve 14, a wiring port circuit board 15, a wiring port circuit board screw 16, a special interface 17, an electromagnet 18, an electromagnet screw 19, a main control circuit board 20, a main control board screw 21, a locking rod 22, a marble 23, a sensor coil 24, an unlocking knob 25, a knob waterproof ring 26 and a top cover 27; The light guide column 13, the copper sleeve 14, and the marble 23 are manufactured by secondary injection molding and are integrally molded with the housing 7. The unlocking knob 25 is installed in the knob waterproof ring 26, and the unlocking knob 25 with the knob waterproof ring 26 installed is installed in the mounting hole on the front side of the housing 7. The locking rod 22 is installed in the locking hole position inside the housing 7, and the electromagnet 18 is fixed to a fixed position inside the housing 7 by an electromagnet screw 19, and the electromagnet 18 is clamped and connected with the locking rod; The dedicated interface 17 is welded to the wiring port circuit board 15, and the wiring port circuit board screw 16 is used to fix the wiring port circuit board 15 to the installation position inside the shell 7, and the dedicated interface 17 on the wiring port circuit board 15 is exposed from the shell 7; the inductor coil 24 is sleeved on the outer ring of the metal part of the marble 23 from the inside of the shell 7, the top cover 27 is assembled to the shell 7, and the inductor coil 24, the marble 23 and the shell 7 are fixed to form a whole by a glue filling process; The main control circuit board 20 is fixed inside the housing 7 by the main control board screws 21; the swing arm 36, the motion pin 37, the fixing pin 38, and the pressing block 34 are assembled together to form a component, and the reset spring 35 is installed in the metal bottom plate 9. The swing arm 36, the motion pin 37, the fixing pin 38, and the pressing block 34 assembly are installed in the metal bottom plate 9 through the reset spring 35, and are all fixed in the metal bottom plate 9 by the spring cover 33 to form a component. The metal base plate 9 is fixed to the back of the housing 7 by base plate screws 11, and the raised part of the metal base plate 9 faces outward to form a component; the push rod waterproof ring 43 is inserted into the flange sleeve 41, and the button 39 is screwed into the thread at one end of the push rod 40. The push rod 43, the flange sleeve 41, the button 39, and the push rod waterproof ring 43 form an assembly emergency unlocking device 5. The safety interlock waterproof ring 32 is placed at the installation position of the metal base plate 9, and the assembled push rod 43, the flange sleeve 41, the button 39, and the push rod waterproof ring 43 are fixed to the metal base plate 9 with the emergency unlocking installation screws 12 to form a sensor 1.

[0022] The actuators are composed of an actuator housing 28, an actuator cover 29, an actuator coil 30, an actuator circuit board 31, a safety interlock waterproof ring 32, a spring cover 33, a pressing block 34, a reset spring 35, a swing arm 36, a moving pin 37, and a fixing pin 38; the actuator coil 30 is welded to the actuator circuit board 31, and the two are installed together in the actuator housing 28, and the actuator cover 29 is assembled to the actuator housing 28, pressed and fixed and bonded as a whole by a glue filling process.

[0023] The connecting cable 6 is fixed on the dedicated interface 17 of the sensor 1 . The connecting cable 6 is integrally formed by injection molding of a cable 44 , a wire screw 45 , and a dedicated plug 46 . The dedicated plug 46 is welded to the cable 44 and an injection molded shell is formed. The wire screw 45 is assembled to the dedicated plug 46 to assemble the connecting cable 6 .

[0024] The emergency unlocking device 5 is fixed to the sensor 1 by the emergency unlocking mounting screw 12; the emergency unlocking device 5 is composed of a button 39, a pressing rod 40, a flange sleeve 41, a screw 42, and a pressing rod waterproof ring 43. The button 39 is sleeved on one end of the pressing rod 40, and the other end of the pressing rod 40 is installed in the flange sleeve 41, and a pressing rod waterproof ring 43 is provided inside. The flange sleeve 41 is fixed to the sensor 1 by a screw 42.

[0025] It also includes a plastic bottom plate 8 and an emergency unlocking dust cover 10. When the emergency unlocking device 5 is not needed, the emergency unlocking dust cover 10 is used instead; when the emergency unlocking device 5 is not needed, the plastic bottom plate 8 is used instead of the metal bottom plate 9.

[0026] When the present invention is used, the connecting cable 6 is fixed on the dedicated interface 17 of the sensor 1 to provide an electrical signal for the sensor 1; the sensor 1 needs to be fixed in a position where the working condition safety door cannot be moved, and the right door actuator 2, the left door actuator 3, the positive actuator and the flexible actuator 4 need to be fixed in a position where the working condition safety door can be opened and closed to ensure that when the working condition safety door is opened and closed, the right door actuator 2, the left door actuator 3, the positive actuator and the flexible actuator 4 can be smoothly inserted or pulled out of the sensor 1; when the sensor 1 uses a metal base plate 9, the emergency unlocking device 5 can be installed on the sensor 1. When the sensor 1 is working, the button 39 of the emergency unlocking device 55 is pressed and the sensor 1 will stop working; no matter whether the sensor 1 is equipped with a metal base plate 9 or a plastic base plate 8, the unlocking knob 25 can be turned from the locked position to the unlocked position to stop the sensor 1. If the sensor 1 needs to resume working, the unlocking knob 25 needs to be turned back from the unlocked position to the locked position.

[0027] The working principle of the sensor 1 and the actuator of the present invention is that firstly, the actuator is three types of actuators for different working conditions. The right door opening actuator 2 is used for the working condition of right door opening, the left door opening actuator 3 is used for the working condition of left door opening, and the positive actuator and the flexible actuator 4 are used for the working condition of positive vertical door opening. Therefore, the actuator is selected according to the actual working condition, but its working principle is the same; insert the ⑥ connecting cable 6 into the dedicated interface 17 of the sensor 1, and fix the wire screw 45 of the connecting cable 6 to the sensor 1, turn on the power and the corresponding signal, confirm that the unlocking knob 25 of the sensor 1 is in the LOCK position, then insert any type of actuator into the locking port position of the sensor, and ensure that one side of the actuator cover 29 is close to the sensor The sensor coil 24 of the actuator 1 is connected to one side of the sensor coil 24, and then the power supply and LOCK signal of the safety interlock connection cable 6 are turned on. At this time, the electromagnet push rod 18 will push the locking rod 22 forward, and the locking rod 22 is pushed into the actuator housing 28 of the actuator. After the main control circuit board 20 monitoring device detects that the electromagnet push rod moves to the LOCK position, the sensor 1 and the actuator enter the working state, and the sensor 1 outputs a signal for the device. At this time, if the unlocking knob 25 is rotated from the LOCK position to the UNLOCK position, the locking rod 22 of the sensor 1 will be forcibly pulled back by mechanical force, and the main control circuit board 20 monitoring device synchronously detects that the electromagnet push rod moves to the UNLOCK position, thereby unlocking the door and interrupting the output signal.

[0028] The working principle of the sensor 1 and the emergency unlocking device 5 of the present invention is that first, the emergency unlocking dust cover 10 of the sensor 1 needs to be removed, and the emergency unlocking device 5 is securely fixed with the emergency unlocking mounting screws 12, and the emergency unlocking device 5 can be tested to be pressed normally and automatically reset, and the unlocking knob 25 of the sensor 1 is confirmed to be in the LOCK position, and the connecting cable 6 is inserted into the dedicated interface 17 of the sensor 1, and the wire screw 45 of the connecting cable 6 is fixed to the sensor 1, and the power supply and the corresponding signal are turned on, and the unlocking knob of the sensor 1 is confirmed to be in the LOCK position. At this time, any actuator is inserted into the locking position of the sensor 1, and it is ensured that the actuator cover 29 is close to the sensor of the sensor 1. The sensor 1 is in the state of being in operation, and the sensor 1 is in the state of being in operation. ...

[0029] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A safety interlock, characterized in that: It includes a sensor, an actuator, an emergency unlocking device, and a connecting cable; the sensor is fixed at a position where the working condition safety door cannot be moved; the actuator includes a right door actuator, a left door actuator, a positive actuator and a flexible actuator, and the right door actuator, the left door actuator, the positive actuator and the flexible actuator are fixed at a position where the working condition safety door can be opened and closed, and when the working condition safety door is opened and closed, the right door actuator, the left door actuator, the positive actuator and the flexible actuator can be smoothly inserted or pulled out of the sensor; the emergency unlocking device is fixed to the sensor; the connecting cable is fixed on the sensor to provide an electrical signal to the sensor.

2. A safety interlock according to claim 1, characterized in that: The sensor includes a housing, a metal base plate, base plate screws, emergency unlocking mounting screws, a light guide column, a copper sleeve, a wiring port circuit board, wiring port circuit board screws, a special interface, an electromagnet, an electromagnet screws, a main control circuit board, a main control board screws, a locking rod, a marble, a sensor coil, an unlocking knob, a knob waterproof ring and a top cover; The light guide column, copper sleeve, and marble are manufactured by secondary injection molding and are integrally molded with the housing. The unlocking knob is installed in the knob waterproof ring, and the unlocking knob with the knob waterproof ring installed is installed in the mounting hole on the front side of the housing. The locking rod is installed in the locking hole position inside the housing, and the electromagnet is fixed to a fixed position inside the housing by an electromagnet screw, and the electromagnet is clamped and connected with the locking rod; The dedicated interface is welded to the wiring port circuit board, and the wiring port circuit board is fixed to the installation position inside the shell by the wiring port circuit board screws, and the dedicated interface on the wiring port circuit board is exposed from the shell; the inductor coil is sleeved on the outer ring of the metal part of the marble from the inside of the shell, the top cover is assembled to the shell, and the inductor coil, the marble and the shell are fixed to form a whole by the glue filling process; The main control circuit board is fixed inside the shell by the main control board screws; the swing arm, the motion pin, the fixing pin, and the pressing block are assembled together to form a component, the reset spring is installed in the metal bottom plate, and the swing arm, the motion pin, the fixing pin, and the pressing block assembly are installed in the metal bottom plate through the reset spring, and are all fixed in the metal bottom plate with a spring cover to form a component. The metal base plate is fixed to the back of the shell by base plate screws, and the raised part of the metal base plate faces outward to form a component; the push rod waterproof ring is inserted into the flange sleeve, and the button is screwed into the thread at one end of the push rod. The push rod, flange sleeve, button, and push rod waterproof ring form an assembly emergency unlocking device. The safety interlock waterproof ring is placed at the metal base plate installation position, and the assembled push rod, flange sleeve, button, and push rod waterproof ring are fixed to the metal base plate with emergency unlocking installation screws to form a sensor.

3. A safety interlock according to claim 2, characterized in that: The actuators are composed of an actuator housing, an actuator cover, an actuator coil, an actuator circuit board, a safety interlock waterproof ring, a spring cover, a pressing block, a reset spring, a swing arm, a moving pin, and a fixing pin; the actuator coil is welded to the actuator circuit board, and the two are installed together in the actuator housing, and the actuator cover is assembled to the actuator housing, pressed and fixed and bonded together by a glue filling process.

4. A safety interlock according to claim 1 or 2, characterized in that: The connecting cable is fixed on the dedicated interface of the sensor. The connecting cable is integrally formed by injection molding of the cable, wire screws and a dedicated plug. The dedicated plug is welded to the cable and an injection-molded shell is formed. The wire screws are assembled to the dedicated plug to assemble the connecting cable.

5. A safety interlock according to claim 1 or 2, characterized in that: The emergency unlocking device is fixed to the sensor through the emergency unlocking mounting screws; the emergency unlocking device consists of a button, a pressing rod, a flange sleeve, screws, and a pressing rod waterproof ring. The button sleeve is connected to one end of the pressing rod, and the other end of the pressing rod is installed in the flange sleeve, and a pressing rod waterproof ring is provided inside. The flange sleeve is fixed to the sensor by screws.

6. A safety interlock according to claim 2, characterized in that: It also includes a plastic bottom plate and an emergency unlocking dust cover. When the emergency unlocking device is not needed, the emergency unlocking dust cover is used instead; when the emergency unlocking device is not needed, the plastic bottom plate is used instead of the metal bottom plate.

7. A safety interlock according to claim 1, characterized in that: The locking mechanisms of the actuator and sensor are made of metal.

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