Metal chain curtain sensor protection structure and punching processing device thereof

Abstract

The utility model discloses a metal chain curtain sensor protection structure and a punching processing device thereof. The punching device is arranged on a punching machining device, and the punching machining device comprises a punch. A protection assembly is included. The protection assembly at least comprises two rows of metal chain curtains; the two rows of metal chain curtains sequentially surround the peripheral side of the punch from inside to outside, and a distance is reserved between the inner row of metal chain curtains and the outer row of metal chain curtains. The protection circuit is respectively connected with the two rows of metal chain curtains; the punching processing device is electrically connected with a controller through the protection circuit; the protection circuit correspondingly controls connection and disconnection of the punching machining device and the controller according to disconnection or connection of the two rows of metal chain curtains. And when fingers contact the two rows of metal chain curtains at the same time, the two rows of metal chain curtains are conducted, and the punching processing device is disconnected with the controller. Through the combination of the metal chain curtain, the protection circuit and the controller, real-time monitoring and quick response to a punching area are achieved, and safety is high.

Description

Technical Field

[0001] This utility model belongs to the technical field of punching devices, specifically relating to a metal chain curtain sensor protection structure and its punching processing device. Background Technology

[0002] In modern industrial production, punching machines are important processing equipment, capable of efficiently punching the required holes in workpieces. For example, Chinese Patent CN201711413U discloses a punching machine comprising a frame, electrical control box, control panel, motor, hydraulic pump, hydraulic cylinder, punch, and die; this prior art allows for lateral adjustment of their positions, making the vertical alignment of the punch and die more precise. However, while traditional punching machines offer convenience, they also pose serious safety hazards.

[0003] Among the aforementioned existing technologies, it is mentioned that employees need to use their hands to move the fixing block inward or outward. If the employee operates improperly or the equipment safety measures are insufficient, workplace accidents are very likely to occur. The consequences are far more than simple pinching injuries; they could result in a hole being punched in the finger or even amputation. This not only causes enormous physical harm and pain to the employee but also brings high medical compensation and downtime losses to the company.

[0004] To address these safety hazards, traditional punching machines employ a series of safety measures, primarily including two-hand operation of the switch buttons, installation of infrared protection switches, and the use of camera-image recognition technology to assess danger. However, in practical applications, these safety measures still have drawbacks:

[0005] When using a two-handed operation switch button for protection, the operator must press the switch with both hands simultaneously to start the punching machine, thus preventing fingers from entering the danger zone during single-handed operation. However, this protection method is not suitable in certain specific processing scenarios. For example, when processing large box shells, the operator needs to use both hands to grasp and hold the workpiece, making it impossible to operate the switch with both hands simultaneously to start the punching machine. Therefore, this protection method has obvious limitations.

[0006] Infrared protection switches detect whether an object has entered a dangerous area by emitting and receiving infrared rays. When an object blocks the infrared rays, the equipment automatically stops operating. However, in some punching machine operating scenarios, due to limitations such as space layout and workpiece shape, there is no suitable location to install infrared protection switches, causing them to fail to perform their due protective function.

[0007] Camera-based image recognition technology uses cameras to capture images of dangerous areas and then uses image recognition algorithms to determine if objects such as fingers have entered. While this technology boasts high accuracy and intelligence, the high cost of the equipment makes large-scale deployment difficult.

[0008] To address the aforementioned drawbacks, a mechanically dynamic protective device has emerged on the market. This device uses an acrylic glass protective cover to provide protection. When a finger is in the danger zone, the cover cannot descend fully, and the punching machine will not start even if the foot switch is pressed. Only when no finger is in the danger zone and the cover is fully descended, pressing the foot switch will allow the punching machine to complete the punching operation normally. While this protective method solves the safety issues of processing large box-shaped workpieces to some extent, and its cost is slightly lower than that of camera-image recognition technology, for most small and medium-sized enterprises, the cost of this protective device still accounts for a large portion of the punching machine's production budget, representing a significant expense.

[0009] Therefore, there is an urgent need for a protective structure with higher safety, wider applicability, and lower cost, as well as its punching processing device. Summary of the Invention

[0010] To address the problems in related technologies, this utility model proposes a metal chain curtain sensor protection structure and its punching processing device to overcome the aforementioned technical problems in existing related technologies. By setting up a lower-cost metal chain curtain, protection circuit and controller, this utility model realizes real-time monitoring and rapid response of the punching area, thereby improving the safety of the punching processing device.

[0011] The technical solution of this utility model is implemented as follows: a metal chain curtain sensor protection structure is provided on a punching processing device, the punching processing device includes a punch for punching workpieces; and includes a protective component.

[0012] It should be noted that other stamping devices that move up and down along the punch axis are considered to have the same technical effect as the punching device.

[0013] The protective assembly includes at least two rows of metal chain curtains; the two rows of metal chain curtains, from the inside out, sequentially surround the periphery of the punch, and there is a distance between the inner and outer rows of metal chain curtains;

[0014] It also includes a protection circuit, which is connected to two rows of metal chain curtains respectively; the punching processing device is electrically connected to a controller through the protection circuit; the protection circuit controls the connection between the punching processing device and the controller according to the opening or closing of the two rows of metal chain curtains.

[0015] It should be noted that when a conductor simultaneously contacts two rows of metal chain curtains, the two rows of metal chain curtains become conductive; wherein, the conductor can be a human body, when a human finger simultaneously contacts two rows of metal chain curtains, the two rows of metal chain curtains become conductive, and the connection between the punching processing device and the controller is disconnected; when the two rows of metal chain curtains are disconnected, the connection between the punching processing device and the controller becomes conductive.

[0016] It should be further explained that when the connection between the punching device and the controller is disconnected, the punching device will be unable to perform the punching action; only when the connection between the punching device and the controller is restored can the punching device be controlled by the controller.

[0017] Furthermore, the metal chain curtain includes multiple sensor chains; each sensor chain hangs down naturally and is arranged in a surrounding manner along the periphery of the punch.

[0018] It should be noted that other naturally hanging conductors are considered to have the same technical effect as the inductive chain.

[0019] Furthermore, the lengths of each of the aforementioned sensing chains may be consistent or inconsistent.

[0020] Furthermore, the sensor chains of the inner and outer rows of metal chain curtains are arranged in an inward and outward staggered manner;

[0021] The interval between the two rows of metal chain curtains is 0.8-1.2cm, and 1.0cm is preferred in this utility model.

[0022] Furthermore, the distance between adjacent inner and outer sensor chains is adapted to the width of the finger;

[0023] Furthermore, the interval between two adjacent induction chains in different rows is 1.0-1.5cm.

[0024] Furthermore, the protection circuit includes a power supply circuit module and a control circuit module; the input terminal of the power supply circuit module is connected to the mains power, and the output terminal is connected to the punching processing device and the control circuit module respectively; the control circuit module is connected to the controller, the punching processing device, and the two rows of metal chain curtains respectively.

[0025] In this invention, the mains power includes 220V AC power.

[0026] Furthermore, the power supply circuit module includes a DC power supply, and the two rows of metal chain curtains are respectively connected to the positive and negative terminals of the DC power supply; when a conductor simultaneously contacts the two rows of metal chain curtains, the two rows of metal chain curtains are connected to the power supply.

[0027] The control circuit module controls the connection between the punching device and the controller according to the opening or closing of the two rows of metal chain curtains;

[0028] Furthermore, the power supply circuit module includes a first port and a second port. The first port is connected to the punching processing device and is used to output 220V AC power isolated from the mains power. The second port is connected to the control circuit module and is used to output DC power. In this utility model, the DC power supply refers to the 12V DC power output after passing through the power supply circuit module.

[0029] It should be further explained that the 220V AC power, after being isolated from the mains power, is rectified by voltage doubler and current limited to output DC power, which is then connected to the metal chain curtain to form the power supply for the metal chain curtain.

[0030] Furthermore, the power supply circuit module also includes a voltage doubler rectifier circuit and a current-limiting resistor R5 connected to it; the voltage doubler rectifier circuit includes diodes D5 to D8, resistors R6 to R9, and capacitors C8 to C9;

[0031] The current-limiting resistor R5 and resistors R6 to R9 all have a resistance of 20 megohms.

[0032] Furthermore, the power supply circuit module includes a transformer; in this invention, the transformer is a dual-secondary-winding transformer, one secondary winding maintains a 220V AC output and is isolated from the AC mains power for safety. The other secondary winding steps down the voltage to a 12V AC output, and the 12V AC power is then rectified and filtered to obtain 12V DC power.

[0033] Furthermore, the control circuit module includes a relay, which is connected to the controller and the punching device respectively; the controller indirectly controls the opening and closing of the punch through the relay.

[0034] Preferably, in this invention, the controller includes a foot switch.

[0035] Furthermore, the power supply circuit module includes a Port1 terminal, a Port7 terminal, a Port8 terminal, and a VCC output terminal; the control circuit module includes a Port2 terminal, a Port3 terminal, a Port4 terminal, a Port5 terminal, a Port6 terminal, and a VCC input terminal.

[0036] The punching device includes a workpiece positioning switch K1b and a workpiece positioning switch K1a. When the workpiece is in place, both the workpiece positioning switch K1b and the workpiece positioning switch K1a are closed.

[0037] The power supply for the metal chain curtain is connected to one row of metal chain curtains via Port1 terminal, and the control circuit module is connected to the other row of metal chain curtains via Port2 terminal.

[0038] The power supply circuit module is electrically connected to the workpiece positioning switch K1a via Port7 and Port8 terminals respectively; the power supply circuit module is electrically connected to the VCC input terminal of the control circuit module via the VCC output terminal.

[0039] It should be noted that the 12V DC power flows from the VCC output terminal to the VCC input terminal;

[0040] The relay is electrically connected to the workpiece positioning switch K1b via Port3 terminal; the relay is electrically connected to the foot switch via Port6 terminal; the foot switch is electrically connected to the workpiece positioning switch K1b via Port5 and Port4 terminals in sequence.

[0041] It should be further explained that when the two rows of metal chain curtains are not connected, the relay operates normally but is not energized. At this time, the relay contacts are closed (NC), and the foot switch normally controls the punch. When the two rows of metal chain curtains are connected, the relay is energized and begins to engage. The relay contacts open, and the connection between the Port3 and Port6 terminals is broken. At this time, the connection between the foot switch and the workpiece positioning switch K1b is broken, thus preventing the foot switch from controlling the punch.

[0042] Furthermore, the protective component includes a protective bracket, the protective bracket includes an annular frame, the inner side of the annular frame is provided with at least two layers of inner and outer parallel strip plates, the lower edge of each strip plate is suspended by the metal chain curtain, and there is a distance between the inner and outer layers of the strip plates;

[0043] Furthermore, the lower edge of each of the strip plates is from which the induction chain is suspended, and the upper end of each induction chain is connected by a conductor; the conductor is disposed on the strip plate and is used to conduct electricity to the induction chain. The annular frame surrounds at least three sides of the punch, and the strip plate is disposed on each of these three sides;

[0044] Furthermore, the metal chain curtain surrounds at least three sides of the punch;

[0045] Furthermore, the shape of the annular frame includes a U-shape.

[0046] A safety baffle is provided on one side of the annular frame;

[0047] Furthermore, the safety barrier is made of a transparent material; the transparent material includes transparent plastic or transparent glass.

[0048] Furthermore, the punching device also includes a lifting assembly for driving the punch to move up and down reciprocally; the lifting assembly includes a pair of guide columns; both ends of the protective bracket are respectively mounted on the two guide columns by locking components;

[0049] It should be noted that users can adjust the position of the protective bracket on the guide post using the locking device to accommodate punches of different heights.

[0050] Furthermore, the inner and outer strip plates are connected by mounting components, and there is good insulation between the inner and outer strip plates.

[0051] Furthermore, the locking component includes a locking element and a fastener. The locking element has a slot in the middle for the guide post to pass through. The fastener passes through a mounting hole on the locking element. By tightening the fastener, the diameter of the slot is reduced, thereby fixing the locking element to the guide post. The two ends of the protective bracket are respectively connected to the corresponding locking elements.

[0052] Furthermore, at least two of the aforementioned locking components are provided, and the two locking components are connected as one unit by a connecting rod;

[0053] Each of the aforementioned lock components has a handle on its outer side.

[0054] Furthermore, the lifting assembly also includes a motor, a rotating wheel, a connecting member, and a movable frame; the motor is connected to the rotating wheel via a transmission; the rotating wheel includes an eccentric cam, and the eccentric cam is directly or indirectly connected to the connecting member.

[0055] The connector slides up and down along the guide post, and one side of the connector is fixedly connected to the movable frame; the movable frame is connected to the punch.

[0056] When the motor drives the rotating wheel to rotate, the eccentric cam converts the circular motion into the reciprocating motion of the moving frame relative to the axis of the rotating wheel.

[0057] A punching processing apparatus with a metal chain curtain sensor protection structure includes a frame and an operating platform mounted on the frame, and also includes the aforementioned metal chain curtain sensor protection structure, wherein the protection structure is mounted on the operating platform.

[0058] It also includes an alarm, and the control circuit module is electrically connected to the alarm; when the two rows of metal chain curtains are connected, the alarm issues a warning.

[0059] It should be noted that, in this utility model, the alarm includes, but is not limited to, voice alarm and indicator light alarm.

[0060] Furthermore, the punch includes at least one drill bit; one side of the operating platform extends laterally to form a processing position; the processing position is located directly below the punch, and the processing position is provided with a slot seat, and the slot seat is provided with a punching groove that mates with the drill bit;

[0061] Furthermore, the punch includes multiple drill bits, and in this utility model, four drill bits are preferably provided, and four punching slots are provided accordingly.

[0062] The beneficial effects of this utility model are:

[0063] (1) By setting a metal chain curtain sensor, when the operator's finger or other conductive body touches two rows of metal chain curtains at the same time, the connection between the punching device and the controller will be cut off immediately, so that the punch cannot be started, which can effectively prevent the finger from entering the dangerous area and significantly improve the safety of operation.

[0064] (2) The metal chain curtain in this utility model has a more flexible structural design, which can adapt to the processing needs of workpieces of different shapes and sizes, and is especially suitable for processing workpieces such as large boxes that require two-hand operation. Compared with traditional two-hand operation switch buttons and infrared protection switches, the protection method of the metal chain curtain is more flexible and is not limited by spatial layout and workpiece shape.

[0065] (3) Compared with camera-image recognition technology, the metal chain curtain sensor of this utility model has a lower cost, simpler structure, and is easier to maintain and promote. It adopts a simple combination of metal chain curtain, protection circuit and controller, which not only achieves efficient safety protection, but also reduces the overall cost of the equipment, making this safety protection measure affordable for more small and medium-sized enterprises. Attached Figure Description

[0066] Figure 1 This is a schematic diagram of the protective structure for a metal chain curtain sensor according to the present invention;

[0067] Figure 2 This is a schematic diagram of the structure of the ring frame of this utility model;

[0068] Figure 3 This is a schematic diagram of the connection between the strip plate and the metal chain curtain of this utility model;

[0069] Figure 4 This is a schematic diagram of the punching processing device of this utility model;

[0070] Figure 5 This is a rear view of the punching device of this utility model;

[0071] Figure 6 This is a schematic diagram of the punching device of this utility model with the frame omitted.

[0072] Figure 7 This is a schematic diagram showing the connection between the protection circuit, the punching device, and the foot switch of this utility model.

[0073] Figure 8 This is a schematic diagram of the circuit structure of the protection circuit of this utility model;

[0074] Figure 9 This is a schematic diagram of the circuit structure of the power supply circuit module of this utility model;

[0075] Figure 10 This is a schematic diagram of the circuit structure of the control circuit module of this utility model;

[0076] Figure 11 This is a schematic diagram of the circuit structure of the power supply for the metal chain curtain of this utility model.

[0077] Marker explanation:

[0078] 1. Frame; 2. Operating platform; 21. Processing station; 22. Slot seat; 3. Punch; 31. Drill bit; 4. Lifting assembly; 41. Rotary wheel; 42. Connecting piece; 43. Moving frame; 5. Protective bracket; 51. Ring frame; 52. Strip plate; 521. Mounting piece; 53. Metal chain curtain; 531. Induction chain; 6. Safety baffle; 7. Guide column; 8. Locking piece; 81. Lock; 82. Fastener; 9. Linkage rod; 10. Handle. Detailed Implementation

[0079] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0080] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0081] like Figure 1-6 As shown, this embodiment provides a protective structure for a metal chain curtain sensor, which is mounted on a punching processing device. The punching processing device includes a punch 3 for punching workpieces and includes protective components.

[0082] It should be noted that other stamping devices that move up and down along the axis of punch 3 are considered to have the same technical effect as the punching device.

[0083] The protective assembly includes at least two rows of metal chain curtains 53; the two rows of metal chain curtains 53 sequentially surround the periphery of the punch 3 from the inside out, and there is a distance between the inner and outer rows of metal chain curtains 53.

[0084] like Figure 7-8 As shown, it also includes a protection circuit, which is connected to the two rows of metal chain curtains 53 respectively; the punching processing device is electrically connected to a controller through the protection circuit; the protection circuit controls the connection between the punching processing device and the controller according to the opening or closing of the two rows of metal chain curtains 53.

[0085] It should be noted that when a conductor simultaneously contacts two rows of metal chain curtains 53, the two rows of metal chain curtains 53 become conductive; wherein, the conductor can be a human body, when a human finger simultaneously contacts two rows of metal chain curtains 53, the two rows of metal chain curtains 53 become conductive, and the connection between the punching processing device and the controller is disconnected; when the two rows of metal chain curtains 53 are disconnected, the connection between the punching processing device and the controller is made conductive;

[0086] It should be further explained that when the connection between the punching device and the controller is disconnected, the punching device will be unable to perform punching operations, thereby effectively preventing fingers from entering the dangerous area; only when the connection between the punching device and the controller is restored can the punching device be controlled by the controller.

[0087] First, this embodiment uses a metal chain curtain sensor to immediately disconnect the connection between the punching device and the controller when the operator's finger or other conductive object simultaneously touches two rows of metal chain curtains 53, thus preventing the punch 3 from starting. This effectively avoids fingers from entering the dangerous area and significantly improves the safety of operation.

[0088] Secondly, the metal chain curtain 53 in this embodiment has a more flexible structural design, which can adapt to the processing needs of workpieces of different shapes and sizes, and is especially suitable for processing workpieces such as large boxes that require two-hand operation. Compared with traditional two-hand operation switch buttons and infrared protection switches, the protection method of the metal chain curtain 53 is more flexible and is not limited by spatial layout and workpiece shape.

[0089] Moreover, compared to camera-based image recognition technology, the metal chain curtain sensor is lower in cost, simpler in structure, and easier to maintain and promote. It employs a simple combination of a metal chain curtain 53, protection circuitry, and controller, achieving both efficient security protection and reducing the overall cost of the equipment, making this security measure affordable for more small and medium-sized enterprises.

[0090] Furthermore, through the cooperation of the protection circuit and the controller, this embodiment achieves intelligent control of the protective structure. When a hazard is detected, the protection circuit can respond quickly, cut off the control, and ensure that the equipment operates in a safe state. This intelligent control method not only improves the reliability of the protection but also reduces the possibility of human error.

[0091] like Figure 1-3 As shown, the metal chain curtain 53 includes multiple sensing chains 531; each sensing chain 531 hangs down naturally and is arranged in a surrounding manner along the periphery of the punch 3.

[0092] It should be noted that other naturally hanging conductors are considered to have the same technical effect as the induction chain 531.

[0093] More specifically, the lengths of each of the aforementioned sensing chains 531 may be consistent or inconsistent, mainly adjusted according to the different sizes of punches 3 and user requirements, to enhance flexibility.

[0094] Specifically, the sensing chains 531 of the inner and outer rows of metal chain curtains 53 are staggered inward and outward; even if the shape, size or movement trajectory of the conductor changes, it can still ensure that it contacts the two rows of metal chain curtains 53 at the same time to a certain extent; this design enhances the reliability of the safety protection mechanism and reduces the risk of misjudgment or missed judgment caused by the conductor failing to contact the two rows of chain curtains at the same time.

[0095] The interval between the two rows of metal chain curtains 53 is in the range of 0.8-1.2cm, and 1.0cm is preferred in this embodiment;

[0096] It's important to note that the spacing is chosen based on two considerations: first, insulation requirements. Too close a distance means thinner insulation support, which can lead to leakage and malfunctions in high humidity. Second, the weight of the drooping metal chains is insufficient to overcome the electrostatic attraction between the two rows of curtains, causing adjacent chains in different rows to stick together, also resulting in malfunctions. A 1.0cm spacing has been proven in practice to ensure reliable insulation while preventing chain sticking. Excessive spacing could force the operator's fingers into a dangerous area to reach chains in different rows, which is unacceptable.

[0097] Specifically, the distance between the inner and outer adjacent sensing chains 531 is adapted to the width of the finger;

[0098] More specifically, the interval between two adjacent induction chains 531 located in different rows is 1.0-1.5cm.

[0099] like Figure 7-10 As shown, the protection circuit includes a power supply circuit module and a control circuit module; the input terminal of the power supply circuit module is connected to the mains power, and the output terminal is connected to the punching processing device and the control circuit module respectively; the control circuit module is connected to the controller, the punching processing device, and the two rows of metal chain curtains 53 respectively.

[0100] In this embodiment, the mains power includes 220V AC power.

[0101] Specifically, the power supply circuit module includes a DC power supply, and the two rows of metal chain curtains 53 are respectively connected to the positive and negative terminals of the DC power supply; when a conductor simultaneously contacts the two rows of metal chain curtains 53, the two rows of metal chain curtains 53 are connected to the power supply.

[0102] The control circuit module controls the connection between the punching device and the controller according to the opening or closing of the two rows of metal chain curtains 53.

[0103] like Figure 9 As shown, the power supply circuit module includes a first port and a second port. The first port is connected to the punching processing device and is used to output 220V AC power isolated from the mains power. The second port is connected to the control circuit module and is used to output DC power. In this embodiment, the DC power supply refers to the 12V DC power output after passing through the power supply circuit module.

[0104] It should be further explained that the 220V AC power, isolated from the mains power, is rectified by a voltage doubler and current limited to output DC power, which is then connected to the metal chain curtain to form the power supply for the metal chain curtain. Figure 11 As shown;

[0105] Specifically, the power supply circuit module also includes a voltage doubler rectifier circuit and a current limiting resistor R5 connected to it; the voltage doubler rectifier circuit includes diodes D5 to D8, resistors R6 to R9 and capacitors C8 to C9;

[0106] Wherein, the resistance value of the current-limiting resistor R5 and resistors R6 to R9 is 20 megohms;

[0107] The design of the voltage doubler rectifier circuit and the current-limiting resistor R5 ensures that the human body induced current on the two rows of metal chain curtains is about 50 microamps, further improving electrical safety.

[0108] More specifically, the power supply circuit module includes a transformer; in this embodiment, the transformer is a dual-secondary-winding transformer, one secondary winding maintains a 220V AC output and is isolated from the AC mains power for safety. The other secondary winding steps down the voltage to a 12V AC output, and the 12V AC power is then rectified and filtered to obtain 12V DC power.

[0109] like Figure 10 As shown, the control circuit module includes relays, which are connected to the controller and the punching device respectively; the controller indirectly controls the opening and closing of the punch 3 through the relays.

[0110] Preferably, in this embodiment, the controller includes a foot switch.

[0111] Specifically, the power supply circuit module includes a Port1 terminal, a Port7 terminal, a Port8 terminal, and a VCC output terminal; the control circuit module includes a Port2 terminal, a Port3 terminal, a Port4 terminal, a Port5 terminal, a Port6 terminal, and a VCC input terminal.

[0112] The punching device includes a workpiece positioning switch K1b and a workpiece positioning switch K1a. When the workpiece is in place, both the workpiece positioning switch K1b and the workpiece positioning switch K1a are closed.

[0113] The power supply for the metal chain curtain is connected to one row of metal chain curtains 53 via Port1 terminal, and the control circuit module is connected to the other row of metal chain curtains 53 via Port2 terminal.

[0114] The power supply circuit module is electrically connected to the workpiece positioning switch K1a via Port7 and Port8 terminals respectively; the power supply circuit module is electrically connected to the VCC input terminal of the control circuit module via the VCC output terminal.

[0115] It should be noted that the 12V DC power flows from the VCC output terminal to the VCC input terminal;

[0116] The relay is electrically connected to the workpiece positioning switch K1b via Port3 terminal; the relay is electrically connected to the foot switch via Port6 terminal; the foot switch is electrically connected to the workpiece positioning switch K1b via Port5 and Port4 terminals in sequence.

[0117] It should be further explained that when the two rows of metal chain curtains 53 are not conductive, the relay operates normally but is not energized. At this time, the relay contacts are closed (NC), and the foot switch normally controls the punch 3 to work. When the two rows of metal chain curtains 53 are conductive, the relay is energized and begins to engage. The relay contacts open, and the connection between the Port3 terminal and the Port6 terminal is broken. At this time, the connection between the foot switch and the workpiece positioning switch K1b is broken, thus preventing the foot switch from controlling the punch 3 to work.

[0118] like Figure 1-3 As shown, the protective component includes a protective bracket 5, which includes an annular frame 51. The inner side of the annular frame 51 is provided with at least two layers of inner and outer parallel strip plates 52. The lower edge of each strip plate 52 is suspended by the metal chain curtain 53, and there is a distance between the inner and outer layers of strip plates 52.

[0119] More specifically, the lower edge of each of the strip plates 52 is suspended by the induction chain 531, and the upper end of each of the induction chains 531 is connected by a conductor; the conductor is disposed on the strip plate 52 and is used to conduct electricity to the induction chain.

[0120] Preferably, in this embodiment, the strip plate 52 may be a printed circuit board.

[0121] The annular frame 51 surrounds at least three sides of the punch 3, and the strip plate 52 is provided on each of these three sides;

[0122] Specifically, the metal chain curtain 53 is divided into inner and outer rows, and each of the sensing chains 531 in the same row is electrically connected; the two rows of metal chain curtains 53 are insulated from each other, and they surround at least three sides of the punch 3.

[0123] More specifically, the shape of the annular frame 51 includes a U-shape;

[0124] It should be noted that in this embodiment, the front, left and right sides of the punch 3 are all surrounded by the strip plate 52 and the metal chain curtain 53. This ensures the normal operation of the punching device and also encloses the dangerous area, improving safety.

[0125] A safety baffle 6 is provided on one side of the annular frame 51;

[0126] Specifically, the safety baffle 6 is made of a transparent material; the transparent material includes transparent plastic or transparent glass;

[0127] The transparent safety barrier 6 allows users to effectively view the interior of the protective structure.

[0128] like Figure 3-6 As shown, the punching processing device also includes a lifting assembly 4 that drives the punch 3 to move up and down reciprocally; the lifting assembly 4 includes a pair of guide posts 7; the two ends of the protective bracket 5 are respectively installed on the two guide posts 7 by locking parts 8;

[0129] It should be noted that users can adjust the position of the protective bracket 5 on the guide post 7 using the locking element 8 as needed to accommodate punches 3 of different heights.

[0130] Specifically, the inner and outer strip plates 52 are connected by mounting members 521, and there is good insulation between the inner and outer strip plates 52;

[0131] It should be noted that the mounting component 521 is a non-conductive connecting component, specifically a mounting screw and nut made of plastic, to ensure that the positive and negative charges of the two rows of metal chain curtains 53 are different.

[0132] Specifically, the locking component 8 includes a locking component 81 and a fastener 82. The locking component 81 has a slot in the middle for the guide post 7 to pass through. The fastener 82 passes through a mounting hole on the locking component 81. By tightening the fastener 82, the diameter of the slot is reduced, thereby fixing the locking component 81 to the guide post 7. The two ends of the protective bracket 5 are respectively connected to the corresponding locking components 81.

[0133] More specifically, at least two of the aforementioned locking elements 81 are provided, and the two locking elements 81 are connected as one unit by a connecting rod 9;

[0134] It should be noted that: Link 9 connects the two locking components 81 into a whole, realizing synchronous action between the two; at the same time, the use of link 9 not only simplifies the synchronous control between locking components 81, but also improves the efficiency and reliability of the entire safety protection structure;

[0135] Each of the locks 81 is provided with a handle 10 on its outer side. When it is necessary to adjust the position of the protective bracket 5 on the guide post 7, the user can use the handle 10 to assist in the adjustment, so as to improve the ease of installation.

[0136] Specifically, the lifting assembly 4 also includes a motor, a rotating wheel 41, a connecting member 42, and a movable frame 43. The motor is connected to the rotating wheel 41 in a transmission manner. The rotating wheel 41 includes an eccentric cam, which is directly or indirectly connected to the connecting member 42.

[0137] The connector 42 slides up and down along the guide post 7, and one side of the connector 42 is fixedly connected to the movable frame 43; the movable frame 43 is connected to the punch 3;

[0138] When the motor drives the rotating wheel 41 to rotate, the eccentric cam converts the circular motion into the reciprocating motion of the moving frame 43 relative to the axis of the rotating wheel 41.

[0139] like Figure 4-6 As shown, a punching processing device with a metal chain curtain sensor protection structure includes a frame 1 and an operating platform 2 disposed on the frame 1, and also includes the aforementioned metal chain curtain sensor protection structure, wherein the protection structure is disposed on the operating platform 2.

[0140] It also includes an alarm, and the control circuit module is electrically connected to the alarm; when the two rows of metal chain curtains 53 are turned on, the alarm issues a warning; this immediate warning can effectively prevent accidents from happening and improve the safety of the entire operation process.

[0141] It should be noted that the alarm design in this embodiment is flexible, including but not limited to voice alarms and indicator light alarms. Voice alarms emit clear and loud warning sounds, attracting the operator's attention even in noisy environments. Indicator light alarms use different colored lights (such as red) to visually display the current status of the equipment, enabling operators to quickly identify and take appropriate action. This variety of alarm methods increases the applicability and reliability of the alarm, ensuring that warning information is effectively conveyed in various situations.

[0142] Specifically, the punch 3 includes at least one drill bit 31; one side of the operating platform 2 extends laterally to form a processing position 21; the processing position 21 is located directly below the punch 3, and the processing position 21 is provided with a slot seat 22, and the slot seat 22 is provided with a punching groove that cooperates with the drill bit 31.

[0143] More specifically, the punch 3 includes a plurality of drill bits 31. In this embodiment, four drill bits 31 are preferably provided, and four punching slots are provided accordingly.

[0144] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A protective structure for a metal chain curtain sensor, mounted on a punching processing device, the punching processing device comprising a punch for punching a workpiece; characterized in that, Including protective components; The protective assembly includes at least two rows of metal chain curtains; the two rows of metal chain curtains, from the inside out, sequentially surround the periphery of the punch, and there is a distance between the inner and outer rows of metal chain curtains; It also includes a protection circuit, which is connected to two rows of metal chain curtains respectively; the punching processing device is electrically connected to a controller through the protection circuit; the protection circuit controls the connection between the punching processing device and the controller according to the opening or closing of the two rows of metal chain curtains.

2. The protective structure for a metal chain curtain sensor according to claim 1, characterized in that, The metal chain curtain includes multiple sensor chains; each sensor chain hangs down naturally and is arranged in a surrounding manner along the periphery of the punch.

3. The metal chain curtain sensor protection structure according to claim 2, characterized in that, The sensor chains of the inner and outer rows of metal chain curtains are arranged in an inverted manner.

4. A protective structure for a metal chain curtain sensor according to claim 2 or 3, characterized in that, The distance between adjacent inner and outer sensor chains is adapted to the width of a finger.

5. The protective structure for a metal chain curtain sensor according to claim 1, characterized in that, The protection circuit includes a power supply circuit module and a control circuit module; the input terminal of the power supply circuit module is connected to the mains power, and the output terminal is connected to the punching processing device and the control circuit module respectively; the control circuit module is connected to the controller, the punching processing device, and the two rows of metal chain curtains respectively.

6. The protective structure for a metal chain curtain sensor according to claim 5, characterized in that, The power supply circuit module includes a DC power supply, and the two rows of metal chain curtains are respectively connected to the positive and negative terminals of the DC power supply; when a conductor simultaneously contacts the two rows of metal chain curtains, the two rows of metal chain curtains are connected to the power supply. The control circuit module controls the connection between the punching device and the controller according to the opening or closing of the two rows of metal chain curtains.

7. A protective structure for a metal chain curtain sensor according to claim 5 or 6, characterized in that, The control circuit module includes a relay, which is connected to the controller and the punching device respectively. The controller indirectly controls the opening and closing of the punch through the relay.

8. The protective structure for a metal chain curtain sensor according to claim 1, characterized in that, The protective component includes a protective bracket, which includes an annular frame. The inner side of the annular frame is provided with at least two layers of inner and outer parallel strip plates. The lower edge of each strip plate is suspended by the metal chain curtain, and there is a distance between the inner and outer layers of strip plates. The annular frame surrounds at least three sides of the punch, and the strip plate is provided on each of these three sides; A safety baffle is provided on one side of the annular frame.

9. The protective structure for a metal chain curtain sensor according to claim 8, characterized in that, The punching device also includes a lifting assembly that drives the punch to move up and down reciprocally; the lifting assembly includes a pair of guide columns; both ends of the protective bracket are respectively mounted on the two guide columns by locking components; The inner and outer strip plates are connected by mounting components, and there is insulation between the inner and outer strip plates.

10. A punching processing apparatus with a metal chain curtain sensor protection structure, comprising a frame and an operating platform disposed on the frame, characterized in that, It also includes a metal chain curtain sensor protection structure as described in any one of claims 1 to 9, wherein the protection structure is disposed on the operating platform.

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