Safety light curtain with strong light interference capability

Abstract

The utility model provides a safety light curtain with strong light interference capability, and relates to the technical field of safety light curtains. Comprising an emitter and a receiver, a positioning hole is formed in a limiting shell, a spring is arranged on the back face of a supporting block, and a positioning rod is movably arranged in the supporting block in a penetrating mode. According to the safety light curtain, parts such as the sliding plates are arranged, and the sliding plates can be vertically limited to move through the limiting shells, so that the use height of the two sets of sliding plates in the two sets of limiting shells can be conveniently adjusted according to use requirements, and the applicability of the safety light curtain is improved; the positioning rods can be inserted into the corresponding positioning holes by pulling the connecting plate and utilizing the elastic pulling force of the spring, so that the sliding plate after position adjustment is positioned, the safety light curtain can be positioned on the side of mechanical equipment by utilizing the extrusion assembly, and the mounting efficiency of the safety light curtain transmitter and the safety light curtain receiver is effectively improved.

Description

Technical Field

[0001] The utility model relates to a safety light curtain, in particular to a safety light curtain with strong light interference capability, belonging to the technical field of safety light curtains. Background Art

[0002] A safety light curtain is a safety-certified light curtain product consisting of a transmitter and a receiver. They form a protective net by emitting and receiving modulated infrared light. When an object enters the protective net, the light curtain detects the obstruction of the light and quickly responds through internal control circuitry, outputting a signal to control the emergency stop of the mechanical equipment, thereby preventing personal injury to the operator. The working principle of a safety light curtain is to establish a connection between the infrared beam emitted by the transmitter and the infrared signal received by the receiver. When there is no object blocking the beam, the receiver can continuously receive the signal, and the internal circuit outputs a low level. If an object enters the beam path, the beam is partially or completely blocked, the receiver cannot receive the signal, and the corresponding internal circuit outputs a high level. In this way, the safety light curtain can detect the presence of the object and output a signal to control the safety response of the mechanical equipment. Safety light curtains are widely used in modern factories, especially near potentially dangerous machinery such as stamping machines, shearing equipment, automated assembly lines, and welding lines. They can protect workers from injuries caused by mechanical movement and improve production site safety. Safety light curtains can also be used to prevent unauthorized entry into dangerous areas, ensuring the safety of the production process.

[0003] Currently, existing safety light curtains are usually installed and fixed to the side of mechanical equipment for protection. However, due to the shape or fixed height of some machines, the two positions of the safety light curtain transmitter and receiver cannot be guaranteed to be on the same plane, which easily reduces the installation efficiency of the safety light curtain transmitter and receiver and reduces the applicability of the safety light curtain. To this end, we provide a safety light curtain with strong light interference capability to solve the above problems. Utility Model Content

[0004] In order to solve the above problems, the present invention provides a safety light curtain with strong light interference capability to solve the above problems. The specific technical solution is as follows:

[0005] A safety light curtain with strong light interference capability comprises a transmitter and a receiver, wherein the back of each transmitter and receiver are provided with a limit shell, a positioning hole is opened inside the limit shell, a sliding plate is movably provided inside the limit shell, two groups of support blocks are provided on both sides of the sliding plate, a spring is provided on the back of the support block, a positioning rod is movably provided inside the support block, and the positioning rod is connected to one end of the spring, and the positioning rod is movably inserted into the positioning hole.

[0006] Preferably, an infrared light emitting diode is provided at the connection end of the transmitter, the receiver is located at one side of the transmitter, and a photosensitive diode is provided at the connection end of the receiver, and the photosensitive diode is located at one side of the infrared light emitting diode.

[0007] Preferably, a plastic plate is provided inside the transmitter and the receiver, a mounting groove is provided inside the plastic plate, and a light strip is movably provided inside the mounting groove.

[0008] Preferably, a guide shell is provided at the top of the transmitter, and a positioning bolt is provided on the internal thread of the guide shell. A guide rod is provided at the top of the receiver, and the guide rod is movably inserted into the interior of the guide shell. The guide shell and the guide rod are both in an "L" shape.

[0009] Preferably, a safety light curtain control unit is provided at the connection end of the receiver, and the safety light curtain control unit is connected to the connection end of the receiver by a connecting wire.

[0010] Preferably, the front of the sliding plate is in a "T" shape, the back of the sliding plate is in an "F" shape, the internal thread of the sliding plate is penetrated by an extrusion assembly, and the bottom ends of the two groups of positioning rods are provided with connecting plates, and the connecting plates are in a "U" shape.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. In the utility model, by providing components such as sliding plates, the upper and lower limit sliding plates can be moved by the limit shell, which is convenient for adjusting the use height of the two sets of sliding plates inside the two sets of limit shells according to use requirements, thereby increasing the applicability of the safety light curtain. When adjusting the use position of the sliding plates inside the limit shell, the positioning rod is pulled out from the positioning hole opened inside the limit shell by pulling the connecting plate. After moving the use position of the sliding plates, the tension on the connecting plate is canceled and the elastic tension of the spring can be used to insert the positioning rod into the corresponding positioning hole, thereby positioning the sliding plates after the adjusted position, and the extrusion assembly can be used to position the safety light curtain on the side of the mechanical equipment, thereby effectively improving the installation efficiency of the safety light curtain transmitter and receiver.

[0013] 2. In the utility model, a plastic plate and a light strip are provided, and an installation groove opened inside the plastic plate is used to provide an installation space for the light strip. The light strip is connected to an external circuit to emit light. The light strip can illuminate the plastic plate, reduce the occurrence of mechanical pauses due to touching the safety light curtain, and enhance the interference ability of the light beam inside the safety light curtain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the explosion structure of the guide shell and guide rod of the utility model;

[0016] Figure 3 This is a schematic diagram of the explosion structure of the plastic plate and light strip of the utility model;

[0017] Figure 4 This is a schematic diagram of the receiver structure of the present utility model;

[0018] Figure 5 This is an exploded schematic diagram of the limit shell and sliding plate of the utility model.

[0019] Description of the drawings: 1. Transmitter; 2. Infrared light-emitting diode; 3. Light strip; 4. Plastic plate; 5. Mounting slot; 6. Guide shell; 7. Positioning bolt; 8. Receiver; 9. Photosensitive diode; 10. Safety light curtain control unit; 11. Guide rod; 12. Limiting shell; 13. Positioning hole; 14. Sliding plate; 15. Support block; 16. Spring; 17. Positioning rod; 18. Connecting plate; 19. Extrusion assembly. DETAILED DESCRIPTION

[0020] The present invention will now be further described with reference to the accompanying drawings.

[0021] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , a safety light curtain with strong light interference capability;

[0022] It includes a transmitter 1 and a receiver 8. The back of the transmitter 1 and the receiver 8 are both provided with a limit shell 12, a positioning hole 13 is opened inside the limit shell 12, a sliding plate 14 is movably provided inside the limit shell 12, two groups of support blocks 15 are provided on both sides of the sliding plate 14, a spring 16 is provided on the back of the support block 15, a positioning rod 17 is movably provided through the inside of the support block 15, and the positioning rod 17 is connected to one end of the spring 16, and the positioning rod 17 is movably inserted into the inside of the positioning hole 13, the front of the sliding plate 14 is in a "T" shape, and the back of the sliding plate 14 is in an "F" shape. The internal thread of the sliding plate 14 is penetrated by an extrusion component 19, and the bottom end of the two groups of positioning rods 17 is provided with a connecting plate 18, and the connecting plate 18 is in a "U" shape.

[0023] The limit housing 12 is positioned on the back of the transmitter 1 and the receiver 8 respectively by bolts, and is movably arranged inside the limit housing 12 through the positioning of the sliding plate 14. The limit housing 12 can move the upper and lower limit sliding plates 14, which is convenient for adjusting the use height of the two sets of sliding plates 14 inside the two sets of limit housings 12 according to usage requirements, thereby increasing the applicability of the safety light curtain;

[0024] When adjusting the use position of the sliding plate 14 inside the limit shell 12, the connecting plate 18 is pulled to pull the positioning rod 17 out of the positioning hole 13 opened inside the limit shell 12, and the support block 15 can be used to limit and guide the reciprocating movement of the positioning rod 17. When the positioning rod 17 is pulled, the spring 16 on the outside of the positioning rod 17 is in a stretched and deformed state. The spring 16 acts to elastically pull the positioning rod 17. After moving the use position of the sliding plate 14, by canceling the pulling force on the connecting plate 18, the elastic pulling force of the spring 16 can be used to make the positioning rod 17 inserted into the corresponding positioning hole 13, thereby positioning the sliding plate 14 after the adjusted position, and then applying a rotational force to the extrusion assembly 19. The extrusion assembly 19 can be used to position the safety light curtain on the side of the mechanical equipment.

[0025] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , a safety light curtain with strong light interference capability;

[0026] An infrared light-emitting diode 2 is provided at the connecting end of the transmitter 1, and the receiver 8 is located on one side of the transmitter 1. A photosensitive diode 9 is provided at the connecting end of the receiver 8, and the photosensitive diode 9 is located on one side of the infrared light-emitting diode 2. A plastic plate 4 is provided on the inner side of the transmitter 1 and the receiver 8, and a mounting groove 5 is provided inside the plastic plate 4. A light strip 3 is movably provided inside the mounting groove 5. A safety light curtain control unit 10 is provided at the connecting end of the receiver 8, and the safety light curtain control unit 10 is connected to the connecting end of the receiver 8 using a connecting wire.

[0027] The transmitter 1 and receiver 8 are the main components of the safety light curtain. The transmitter 1 uses an infrared light emitting diode 2 to emit infrared light, while the receiver 8 uses a photosensitive diode 9 to receive this light. Under normal circumstances, the infrared light beam emitted by the transmitter 1 is continuously received by the receiver 8, forming a protective light curtain. When an object, especially a person's arm or body, enters this protective light curtain, the light beam will be interrupted and the receiver 8 will not be able to receive the complete light signal. At this time, the circuit inside the safety light curtain will immediately react and send a signal to the safety light curtain control unit 10. The control system inside the safety light curtain control unit 10 will then activate the emergency stop function, causing the mechanical equipment to stop operating, thereby preventing personnel from being injured.

[0028] Both sets of plastic plates 4 are positioned on the inner side of the transmitter 1 and the receiver 8 by bolts. The mounting groove 5 opened inside the plastic plate 4 can provide installation space for the light strip 3. The light strip 3 is connected to the external circuit to emit light. The light strip 3 can illuminate the plastic plate 4, reduce the occurrence of mechanical pauses due to touching the safety light curtain, and enhance the interference ability of the internal light beam of the safety light curtain.

[0029] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , a safety light curtain with strong light interference capability;

[0030] A guide shell 6 is provided at the top of the transmitter 1, and a positioning bolt 7 is provided on the internal thread of the guide shell 6. A guide rod 11 is provided at the top of the receiver 8, and the guide rod 11 is movably inserted into the interior of the guide shell 6. Both the guide shell 6 and the guide rod 11 are in an "L" shape.

[0031] The guide rod 11 set in an "L" shape at the top of the receiver 8 is movably inserted into the interior of the guide shell 6. The guide shell 6 can linearly limit the auxiliary movement of the guide rod 11, so that the transmitter 1 and the receiver 8 are always in the same plane. By rotating the positioning bolt 7, the guide rod 11 can be positioned inside the guide shell 6.

[0032] The electrical equipment in this application are all common electrical equipment in the prior art. This application will not go into too much detail about their models or internal structures, and they can also be replaced by other power sources.

[0033] The technical principles of the present invention have been described above in conjunction with specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the claims of the present invention.

Claims

1. A safety light curtain with strong light interference capability, comprising a transmitter (1) and a receiver (8), characterized in that: The back of the transmitter (1) and the receiver (8) are both provided with a limit shell (12), a positioning hole (13) is opened inside the limit shell (12), a sliding plate (14) is movably provided inside the limit shell (12), two groups of support blocks (15) are provided on both sides of the sliding plate (14), a spring (16) is provided on the back of the support block (15), a positioning rod (17) is movably provided inside the support block (15), and the positioning rod (17) is connected to one end of the spring (16), and the positioning rod (17) is movably inserted into the interior of the positioning hole (13).

2. A safety light curtain with strong light interference capability according to claim 1, characterized in that: An infrared light-emitting diode (2) is provided at the connection end of the transmitter (1), the receiver (8) is located on one side of the transmitter (1), and a photosensitive diode (9) is provided at the connection end of the receiver (8), and the photosensitive diode (9) is located on one side of the infrared light-emitting diode (2).

3. The safety light curtain with strong light interference capability according to claim 1, characterized in that: A plastic plate (4) is provided on the inner side of the transmitter (1) and the receiver (8), a mounting groove (5) is provided inside the plastic plate (4), and a light strip (3) is movably provided inside the mounting groove (5).

4. The safety light curtain with strong light interference capability according to claim 1, characterized in that: The top of the transmitter (1) is provided with a guide shell (6), the internal thread of the guide shell (6) is provided with a positioning bolt (7), the top of the receiver (8) is provided with a guide rod (11), and the guide rod (11) is movably inserted into the interior of the guide shell (6), and the guide shell (6) and the guide rod (11) are both in an "L" shape.

5. The safety light curtain with strong light interference capability according to claim 1, characterized in that: A safety light curtain control unit (10) is provided at the connection end of the receiver (8), and the safety light curtain control unit (10) is connected to the connection end of the receiver (8) using a connecting wire.

6. The safety light curtain with strong light interference capability according to claim 1, characterized in that: The front of the sliding plate (14) is in a "T" shape, and the back of the sliding plate (14) is in an "F" shape. An extrusion assembly (19) is provided through the internal thread of the sliding plate (14). The bottom ends of the two groups of positioning rods (17) are provided with connecting plates (18), and the connecting plates (18) are in a "U" shape.

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