Grating protection device of bending machine

Abstract

The utility model relates to a grating protection device of a bending machine, and belongs to the field of safety protection of the bending machine, the grating protection device comprises two positioning plates, positioning rods and a grating sensor, the positioning plates are symmetrically arranged on two sides of a bending machine body and are rotatably connected with the bending machine body through rotating shafts or hinges, and the positioning plates are provided with telescopic positioning rods and locking pieces which are convenient to adjust and fix; the technical effects that the safety protection performance is improved, and meanwhile operation and adjustment of the workpiece and the mold are facilitated are achieved.

Description

Technical Field

[0001] The present application relates to the field of safety protection of bending machines, and in particular to a grating protection device for bending machines. Background Art

[0002] Safety is a key issue in sheet metal bending, both in industrial production and in operations. Press brakes are essential equipment in the modern metalworking industry, bending sheet metal into desired shapes during the production process. With the continuous expansion of industrial production, press brakes are becoming increasingly popular, improving sheet metal processing efficiency and product quality. However, these applications have also exposed numerous safety risks, particularly due to operators' tendency to neglect safety precautions during operation, leading to frequent workplace accidents. Traditional safety measures in existing bending processes primarily include fixed guards or fences to isolate the operator from the work area, and mechanical interlocks to prevent operators from entering hazardous areas while the equipment is in operation. Another common approach involves assigning dedicated supervisors to oversee the operation process to ensure personnel safety, or employing simple mechanical safety switches to monitor the work area and immediately stop the machine upon detection of an abnormality. However, the above-mentioned commonly used protective measures have some shortcomings. For example, although fixed protective covers or guardrails can isolate the operator, they limit the operating space and affect the loading and unloading efficiency of the workpiece; the mechanical interlocking device has a complex structure and high maintenance cost, which reduces the operating efficiency of the equipment; the deployment of supervisors will increase labor costs and cannot guarantee 24-hour monitoring; although traditional photoelectric safety switches can detect the working area in real time, they are difficult to adjust flexibly and cannot meet the processing needs of workpieces of different sizes. In particular, in actual situations, the safety protection device on the bending machine is difficult to make way for the workpiece and mold on the workbench, which brings inconvenience to actual operation. Utility Model Content

[0003] The purpose of this application is to overcome the above technical problems and provide a grating protection device for a bending machine.

[0004] A grating protection device for a bending machine comprises two positioning plates, positioning rods connected to the positioning plates, and grating sensors connected to the positioning rods. The positioning plates are symmetrically arranged on either side of the bending machine body. The positioning plates are rotatably connected to the side walls of the bending machine body to facilitate the clearance of workpieces and molds on the workbench. Positioning members are provided between the positioning plates and the side walls of the bending machine body. By adopting the above technical solution, when a user reaches into the bending machine, the sensing line between the two grating sensors is blocked, and the bending machine can be stopped to prevent harm to the user. The positioning plates rotate relative to the bending machine body, which drives the grating to rotate, so that the grating does not affect the replacement of the mold.

[0005] Preferably, one end of the positioning plate is fixedly connected to a rotating shaft, which is rotatably connected to the side wall of the bending machine body. The positioning member is a bolt, which is threadedly connected to the end of the positioning plate away from the rotating shaft. By adopting this technical solution, when using, the user can remove the bolt and flip the positioning plate downward or upward about the rotating shaft, so that the grating sensor can make way for the mold or workpiece.

[0006] Preferably, the positioning plate is provided with a hinge, and the positioning plate is hinged to the bending machine body through the hinge. The positioning piece is configured as a magnet, and the positioning plate is fixed to the bending machine body through the magnet.

[0007] By adopting the above technical solution, when the user uses it, he pulls the positioning plate, and the positioning plate can be flipped backward and outward around the hinge, so that the grating sensor makes way for the mold or workpiece.

[0008] Preferably, the positioning rod is a telescopic rod.

[0009] By adopting the above technical solution, the positioning rod can be extended and retracted during use, thereby adjusting the height of the grating sensor to accommodate workpieces and molds of different sizes. Preferably, the positioning rod includes a positioning sleeve and a connecting rod slidably connected to the positioning sleeve, the grating sensor is connected to the connecting rod, and the positioning sleeve is provided with a locking member for securing the connecting rod to the positioning sleeve.

[0010] By adopting the above technical solution, the user can adjust the height of the grating sensor by sliding the connecting rod during use, and the sliding connection facilitates adjustment of the height of the grating sensor. Preferably, a clearance groove is defined in the middle of the connecting rod, and the clearance groove is arranged along the sliding direction of the connecting rod. The locking member includes a locking screw threadedly connected to the positioning sleeve, and the locking screw passes through the clearance groove and is fixedly connected to the limit nut.

[0011] By adopting the above technical solution, when using, the user loosens the locking screw to separate the locking screw from the connecting rod, allowing the connecting rod to slide in the positioning sleeve. After sliding to an appropriate height, the locking screw is tightened so that the locking nut presses the connecting rod against the positioning sleeve, thereby fixing the connecting rod. Preferably, the connecting rod is provided with a scale, and the limit nut is provided with an indicator array.

[0012] By adopting the above technical solution, when the user slides the connecting rod upward, the scale and the indicator needle can accurately and intuitively measure the adjustment distance of the grating sensor, so that the adjustment distances of the grating sensors on both sides are the same. Preferably, a handle is provided on the positioning plate.

[0013] By adopting the above technical solution, when the user uses it, the handle can facilitate the staff to push the positioning plate to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application;

[0015] Figure 2 This is a schematic diagram of the overall structure of Example 2 of the present application;

[0016] Figure 3 This is a schematic structural diagram of the grating protection device of Example 2 of the present application;

[0017] Figure 4 This is an exploded view of the grating protection device of Example 2 of the present application.

[0018] Figure numerals: 1. Positioning plate; 11. Rotating shaft; 12. Hinge; 13. Magnet; 14. Insertion slot; 2. Positioning rod; 21. Positioning sleeve; 211. Slot; 22. Connecting rod; 221. Gap slot; 23. Locking screw; 231. Limit nut; 24. Scale; 25. Indicator needle; 26. Handle; 27. Fixing ring; 28. Guide rod; 3. Grating sensor; 4. Bending machine body. DETAILED DESCRIPTION

[0019] The following will be combined with the Figure 1-4 , a clear and complete description of the technical solutions in the embodiments of the present invention is given. The described embodiments are only possible technical implementations of the present invention, and not all implementations are possible. Those skilled in the art can fully combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention. The inventors of the present application found that in the process of bending metal sheets, due to the lack of effective safety protection measures, it is easy for workers to put their hands under the bending tool, causing safety accidents. For this reason, the present application mainly adopts the solution of setting a grating sensor on the bending machine to prevent accidental injuries. Example 1:

[0020] The embodiment of the present application provides a grating protection device for a bending machine, referring to Figure 1 The system comprises two positioning plates 1, positioning rods 2 connected to the plates 1, and grating sensors 3 connected to the rods 2. The positioning plates 1 are symmetrically arranged on either side of a press brake body 4. The positioning plates 1 are rotatably connected to the side walls of the press brake body 4 to facilitate the repositioning of workpieces and molds on the workbench. This solution ensures operator safety while maintaining workpiece loading and unloading accuracy and machining accuracy.

[0021] Specifically, one end of the positioning plate 1 is fixedly connected to a rotating shaft 11, and the rotating shaft 11 is rotatably connected to the bending machine body 4, so that the positioning plate 1 can rotate within a certain range, thereby facilitating the operator to load and unload the workpiece. The rotating shaft 11 can be made of high-strength alloy steel, which has high strength and wear resistance and can effectively extend the service life. In addition, the rotating shaft 11 can also be made of stainless steel, which not only ensures strength but also has an anti-corrosion effect. In order to ensure that the positioning plate 1 can be reliably fixed to the bending machine body 4, a hinge 12 or a magnet 13 can be set on the positioning plate 1 as a positioning member.

[0022] One end of the positioning plate 1 away from the rotating shaft 11 is threadedly connected with a bolt, and the positioning plate 1 can be fixed to the bending machine body 4 by the bolt. The bolt can be made of stainless steel to improve corrosion resistance.

[0023] The implementation principle of this embodiment 1 is:

[0024] By combining the grating sensor 3 with the positioning plate 1, a dynamic safety protection system is formed. On the one hand, the linkage between the positioning plate 1 and the bending machine body 4 ensures that operators can load and unload workpieces without any obstruction. On the other hand, the grating sensor 3 monitors the intrusion of foreign objects in the working area in real time. If an anomaly occurs, the machine is immediately shut down to avoid accidents. The ingenious design of the entire system not only simplifies the structural complexity of traditional protective devices, but also greatly enhances the flexibility and reliability in practical applications, significantly improving the safety of sheet metal bending operations.

[0025] Example 2:

[0026] The difference from the first embodiment is that, referring to Figure 2 、 Figure 3 and Figure 4, a hinge 12 is provided at one end of the positioning plate 1, and the positioning plate 1 is hinged to the bending machine body 4 through the hinge 12. A magnet 13 is provided on the side wall of the bending machine body 4. The positioning plate 1 is made of metal material, and a plug-in slot 14 is provided at the position of the positioning plate 1 corresponding to the magnet 13. The magnet 13 can be plugged into the plug-in slot 14 and can be adsorbed together with the positioning plate 1, and it is firmly fixed to the side wall of the bending machine body 4 by magnetic force. The advantage of this method is that it can be quickly disassembled and assembled without the assistance of tools. Among them, for the selection of the positioning rod 2, a telescopic rod form can be selected. The design of the telescopic rod enables it to adjust its length according to the requirements of workpieces of different sizes, thereby improving its applicability. For example, the positioning rod 2 can be divided into two parts: a positioning sleeve 21 and a connecting rod 22. A slot 211 is provided on the positioning sleeve 21, and the connecting rod 22 is slidably connected in the slot 211, and the two are connected by sliding to form a telescopic structure. In order to ensure a stable connection, a locking screw 23 is threadedly connected to the positioning sleeve 21, and a clearance groove 221 is provided on the connecting rod 22. The locking screw 23 passes through the clearance groove 221 on the connecting rod 22, and the end of the locking screw 23 is fixedly connected to a limiting nut 231. The diameter of the limiting nut 231 is larger than the inner diameter of the clearance groove 221. Such a design can not only ensure the stability of the connection, but also facilitate fine-tuning the position of the positioning rod 2. A scale 24 can also be provided on the surface of the connecting rod 22 to facilitate the operator to accurately adjust the extension of the connecting rod 22. An indicator needle 25 can be provided on the limiting nut 231 to help lock the position. This design not only improves the accuracy of the adjustment, but also reduces the safety hazards caused by misoperation.

[0027] A fixing ring 27 is fixedly connected to the positioning sleeve 21, and a guide rod 28 is fixedly connected to the positioning plate 1. The guide rod 28 is arranged perpendicular to the positioning plate 1. The fixing ring 27 is sleeved on the guide rod 28. Bolts are threaded on the fixing ring 27, which can adjust the position of the positioning sleeve 21 and thereby adjust the distance between the two grating sensors 3.

[0028] In addition, a handle 26 is provided on the positioning plate 1 to facilitate the operator to move the positioning plate 1. The handle 26 can be made of plastic or rubber material, which is comfortable to the touch and not easy to slip. This design helps to improve the convenience and safety of operation.

[0029] The implementation principle of the second embodiment is: By combining the grating sensor 3 with the positioning plate 1, a dynamic safety protection system is formed. On the one hand, the linkage design between the positioning plate 1 and the bending machine body 4 ensures that the operator can load and unload the workpiece without any hindrance; on the other hand, the grating sensor 3 monitors the intrusion of foreign objects in the working area in real time. Once an abnormality occurs, the machine is shut down immediately to avoid accidents. The ingenious design of the entire system not only simplifies the structural complexity of traditional protective devices, but also greatly improves the flexibility and reliability in practical applications, and significantly improves the safety of metal sheet bending operations. The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present application should be covered within the scope of protection of the present application.

Claims

1. A grating protection device for a bending machine, characterized in that: The invention comprises two positioning plates (1), positioning rods (2) connected to the positioning plates (1), and grating sensors (3) connected to the positioning rods (2); the positioning plates (1) are symmetrically arranged on both sides of a bending machine body (4); the positioning plates (1) are rotatably connected to the side walls of the bending machine body (4) to facilitate the clearance of workpieces and molds on a workbench; a positioning piece is arranged between the positioning plate (1) and the side walls of the bending machine body (4); the positioning piece is used to fix the positioning plate (1) to the bending machine body (4).

2. The grating protection device for a bending machine according to claim 1, characterized in that: One end of the positioning plate (1) is fixedly connected to a rotating shaft (11), and the rotating shaft (11) is rotatably connected to the side wall of the bending machine body (4). The positioning member is a bolt, and the bolt is threadedly connected to the end of the positioning plate (1) away from the rotating shaft (11).

3. The grating protection device for a bending machine according to claim 1, characterized in that: The positioning plate (1) is provided with a hinge (12), and the positioning plate (1) is hinged to the bending machine body (4) via the hinge (12); the positioning member is provided as a magnet (13), and the positioning plate (1) is fixed to the bending machine body (4) via the magnet (13).

4. A grating protection device for a bending machine according to claim 2 or 3, characterized in that: The positioning rod (2) is a telescopic rod.

5. The grating protection device for a bending machine according to claim 4, characterized in that: The positioning rod (2) comprises a positioning sleeve (21) and a connecting rod (22) slidably connected to the positioning sleeve (21); the positioning sleeve (21) is provided with a locking member for fixing the connecting rod (22) and the positioning sleeve (21).

6. A grating protection device for a bending machine according to claim 5, characterized in that: A clearance groove (221) is provided in the middle of the connecting rod (22), and the clearance groove (221) is arranged along the sliding direction of the connecting rod (22). The locking member includes a locking screw (23) threadedly connected to the positioning sleeve (21), and the locking screw (23) passes through the clearance groove (221) and is fixedly connected to the limiting nut (231).

7. A grating protection device for a bending machine according to claim 6, characterized in that: A scale (24) is provided on the connecting rod (22), and an indicator array is provided on the limiting nut (231).

8. The grating protection device for a bending machine according to claim 1, characterized in that: A handle (26) is provided on the positioning plate (1).

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