A liftable punch press guard with safety interlock protection

Abstract

The utility model discloses a liftable punch press guard rail with safety interlock protection relates to machining safety protection equipment technical field, including liftable guard rail and safety interlock protection device, the liftable guard rail includes fixed frame, movable guard rail and the shearing type lifting mechanism of movable connection between fixed frame and movable guard rail, the fixed frame is installed in punch press workstation edge, and movable guard rail is through the shearing type lifting mechanism and is slidably matched in the outside of fixed frame, the safety interlock protection device includes bolt safety switch and bolt, bolt safety switch is installed on the fixed frame, and the bolt is installed on movable guard rail, and the emergency stop signal of punch press is connected to bolt safety switch, and the bolt is separated or inserted bolt safety switch, realizes the unlocking or locking of movable guard rail, and the power -on or power -off of punch press's emergency stop signal is controlled simultaneously, and when the guard rail is not closed, the punch press cannot start, and the reliability of protection is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of safety protection equipment for mechanical processing, specifically relating to a liftable punch press guardrail with safety interlock protection. Background Technology

[0002] During the stamping process, the slide of a punch press reciprocates at high speed. If an operator accidentally enters the danger zone or the guardrail is not effectively closed, a safety accident can easily occur. Most existing punch press guardrails only provide physical isolation, and their safety interlocking devices often use electronic sensors in conjunction with a controller. These devices suffer from problems such as response delay and susceptibility to interference. When the sensor malfunctions, the interlocking may fail.

[0003] Therefore, it is necessary to design a simple, direct, and reliable safety interlock protection device to ensure that the punch press cannot start when the guardrail is not closed. Utility Model Content

[0004] The purpose of this invention is to provide a punch press guardrail with safety interlock protection, which directly controls the circuit on / off through the mechanical cooperation of the safety switch and the pin, thereby improving the reliability of protection.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A liftable punch press guardrail with safety interlock protection includes a liftable guardrail and a safety interlock protection device. The liftable guardrail includes a fixed frame, a movable guardrail, and a scissor-type lifting mechanism movably connected between the fixed frame and the movable guardrail. The fixed frame is installed on the edge of the punch press worktable, and the movable guardrail is slidably engaged with the outside of the fixed frame through the scissor-type lifting mechanism. The safety interlock protection device includes a pin safety switch and a pin. The pin safety switch is installed on the fixed frame, and the pin is installed on the movable guardrail. The pin safety switch is connected to the emergency stop signal of the punch press. When the pin disengages from or inserts into the pin safety switch, the movable guardrail is unlocked or locked, and the emergency stop signal of the punch press is simultaneously powered on or de-energized.

[0007] As an alternative or supplement to the aforementioned liftable punch press guardrail with safety interlock protection, the fixing frame includes a main board and side plates connected to both ends of the main board. The main board and the two side plates enclose an active space for the scissor-type lifting mechanism to lift.

[0008] As an alternative or supplement to the aforementioned height-adjustable punch press guardrail with safety interlock protection, the two side plates are provided with lugs at the ends near the worktable, and the fixing frame is installed on the edge of the worktable through the lugs.

[0009] As an alternative or supplement to the aforementioned liftable punch press guardrail with safety interlock protection, the scissor lifting mechanism includes a scissor arm assembly and a pneumatic push rod. The scissor arm assembly includes two scissor arms, which are connected by a pin to form a cross structure. One end of one scissor arm is hinged to the main board, and the other end is hinged to a slider one. One end of the other scissor arm is hinged to the movable guardrail, and the other end is hinged to a slider two. The piston rod of the pneumatic push rod is connected to slider two.

[0010] As an alternative or supplement to the aforementioned height-adjustable punch press guardrail with safety interlock protection, the movable guardrail is provided with a slide rail, and the slider is slidably connected to the slide rail.

[0011] As an alternative or supplement to the aforementioned liftable punch press guardrail with safety interlock protection, the main board is provided with a second slide rail, and the pneumatic push rod pushes the second slider to slide on the second slide rail.

[0012] As an alternative or supplement to the aforementioned height-adjustable punch press guardrail with safety interlock protection, the movable guardrail includes a top mounting strip, a protective net, and a bottom mounting strip. The top mounting strip, the protective net, and the bottom mounting strip are connected in sequence to form an inverted cover structure. The slide rail is installed on the top mounting strip, and the pin is installed on the bottom mounting strip.

[0013] As an alternative or supplement to the aforementioned liftable punch press guardrail with safety interlock protection, the pin safety switch is embedded in the bottom of the fixed frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) Safety interlock protection function: Through the cooperation of the safety switch and the pin, the interlock control between the movable guardrail and the punch press power system is realized. When the guardrail is not fully closed, the punch press cannot be started, thus fundamentally eliminating safety accidents caused by misoperation.

[0016] (2) Lifting function: The movable guardrail is lifted by using a scissor lifting mechanism. When the movable guardrail is raised, it achieves physical isolation; when the movable guardrail is lowered, it is close to the side of the punch press. The structure is compact and does not take up space. Attached Figure Description

[0017] Figure 1 This is a front view of the present invention;

[0018] Figure 2 This is a side view of the present invention;

[0019] Figure 3 This is a top view of the fixing frame of this utility model;

[0020] Figure 4This is a schematic diagram of the overall structure of the movable guardrail of this utility model.

[0021] In the diagram: 1. Fixed frame; 101. Main board; 102. Side plate; 103. Lug; 2. Movable guardrail; 201. Top mounting strip; 202. Protective net; 203. Bottom mounting strip; 3. Workbench; 4. Plug safety switch; 5. Plug; 6. Working space; 7. Pneumatic push rod; 8. Scissor arm; 9. Slider one; 10. Slider two; 11. Slide rail one; 12. Slide rail two; 13. Scissor lifting mechanism. Detailed Implementation

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0023] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element 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 on the scope of protection of this utility model; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0024] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0025] Example 1

[0026] like Figures 1-4 As shown in the figure, this embodiment provides a liftable punch press guardrail with safety interlock protection, including a liftable guardrail and a safety interlock protection device. In this embodiment, there are two liftable guardrails and two safety interlock protection devices, which are located on the left and right sides of the worktable 3, respectively.

[0027] Please see Figure 1 and Figure 2The liftable guardrail includes a fixed frame 1, a movable guardrail 2, and a scissor-type lifting mechanism 13 movably connected between the fixed frame 1 and the movable guardrail 2. The fixed frame 1 is installed on the edge of the punch press worktable 3, and the movable guardrail 2 is slidably fitted to the outside of the fixed frame 1 through the scissor-type lifting mechanism 13. The safety interlock protection device includes a pin safety switch 4 and a pin 5. The pin safety switch 4 is installed on the fixed frame 1, and the pin 5 is installed on the movable guardrail 2. The pin safety switch 4 is connected to the emergency stop signal of the punch press. The pin 5 disengages from or inserts into the pin safety switch 4 to realize the movable guardrail. The unlocking or locking of guardrail 2 simultaneously controls the emergency stop signal of the punch press to be powered on or off. Specifically, the pin safety switch 4 is model SN6191-SL-C. The normally closed contact inside the pin safety switch 4 is connected in series in the power control circuit of the punch press. When the pin 5 is not inserted into the trigger hole of the pin safety switch 4, the normally closed contact is in the closed state, and the power circuit of the punch press is disconnected. When the pin 5 is inserted into the trigger hole of the pin safety switch 4, the normally closed contact is forcibly separated. At this time, the power circuit of the punch press is connected, and the punch press can be started. The pin safety switch 4 itself has a certain locking capability, which can realize the unlocking or locking of the movable guardrail 2.

[0028] By using the safety switch 4 and the pin 5 together, the interlock control between the movable guardrail 2 and the punch press power system is achieved. When the guardrail is not fully closed, the punch press cannot be started, thus fundamentally preventing safety accidents caused by misoperation.

[0029] In some embodiments, please refer to Figure 3 The fixing frame 1 includes a main board 101 and side plates 102 connected to both ends of the main board 101. The two side plates 102 are provided with lugs 103 at the ends near the workbench 3. The fixing frame 1 is installed on the edge of the workbench 3 through the lugs 103. Specifically, the lugs 103 are rectangular sheet structures connected to the ends of the side plates 102. The lugs 103, side plates 102 and main board 101 are integrally formed. After the fixing frame 1 is fixed to the edge of the workbench 3, the edge of the workbench 3 and the fixing frame 1 enclose an active space 6 for the lifting and lowering of the scissor-type lifting mechanism 13.

[0030] For details, please refer to Figure 2 and Figure 3The scissor lift mechanism 13 is located inside the fixed frame 1. The scissor lift mechanism 13 includes a scissor arm 8 assembly and a pneumatic push rod 7. The scissor arm 8 assembly includes two scissor arms 8, which are connected by a pin to form a cross structure. One end of one scissor arm 8 is hinged to the main board 101, and the other end is hinged to a slider 9. The movable guardrail 2 is provided with a slide rail 11, and the slider 9 is slidably connected to the slide rail 11. One end of the other scissor arm 8 is hinged to the movable guardrail 2, and the other end is hinged to a slider 10. The main board 101... The upper part is provided with a slide rail 2 12 that slides with the slider 2 10. The piston rod of the pneumatic push rod 7 is connected to the slider 2 10. The pneumatic push rod 7 pushes the slider 2 10 to slide on the slide rail 2 12. The pneumatic push rod 7 is installed in the movable space 6. When the piston rod of the pneumatic push rod 7 is extended, the piston rod pushes the slider 2 10 to the right along the slide rail 2 12, and the movable guardrail 2 rises to achieve physical isolation. When the piston rod of the pneumatic push rod 7 is retracted, the piston rod pulls the slider 2 10 to the left along the slide rail 2 12, and the movable guardrail 2 descends and is close to the side of the punch press. The structure is compact and does not occupy space.

[0031] In some embodiments, please refer to Figure 4 The movable guardrail 2 includes a top mounting strip 201, a protective net 202, and a bottom mounting strip 203. These three components are sequentially connected to form an inverted cover structure. A slide rail 11 is mounted on the top mounting strip 201, and a pin 5 is mounted on the bottom mounting strip 203. When the movable guardrail 2 rises to its designated position, the pin 5 inserts into the pin safety switch 4, completing the locking process. At this point, please refer to... Figure 1 The scissor lift mechanism 13 and the fixed frame 1 are completely covered by the movable guardrail 2, making the overall appearance simpler and also serving the purpose of protecting the scissor lift mechanism 13 during use.

[0032] Preferably, the safety switch 4 is embedded in the bottom of the mounting bracket 1. When the pin 5 is inserted into the safety switch 4, the top surface of the bottom mounting strip 203 abuts against the bottom surface of the main board 101 on the mounting bracket 1, making the overall structure more compact.

[0033] To prevent the movable guardrail 2 from shifting during its ascent and to ensure that the pin 5 can be properly inserted into the safety switch 4, a guide mechanism can be installed between the movable guardrail 2 and the punch press. The guide mechanism can be a combination of a guide rail and a slider. The guide rail is vertically mounted on the punch press, and the slider is mounted on the side of the movable guardrail 2 closest to the guide rail, slidingly engaging with the guide rail. The guide mechanism enables precise displacement of the movable guardrail 2.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A height-adjustable punch press guardrail with safety interlock protection, characterized in that, The device includes a liftable guardrail and a safety interlock protection device. The liftable guardrail includes a fixed frame (1), a movable guardrail (2), and a scissor lifting mechanism (13) movably connected between the fixed frame (1) and the movable guardrail (2). The fixed frame (1) is installed on the edge of the punch press worktable (3), and the movable guardrail (2) is slidably fitted on the outside of the fixed frame (1) through the scissor lifting mechanism (13). The safety interlock protection device includes a pin safety switch (4) and a pin (5). The pin safety switch (4) is installed on the fixed frame (1), and the pin (5) is installed on the movable guardrail (2). The pin safety switch (4) is connected to the emergency stop signal of the punch press. The pin (5) disengages from or inserts into the pin safety switch (4) to unlock or lock the movable guardrail (2) and simultaneously controls the emergency stop signal of the punch press to be powered on or off.

2. A height-adjustable punch press guardrail with safety interlock protection as described in claim 1, characterized in that, The fixed frame (1) includes a main board (101) and side plates (102) connected to both ends of the main board (101). The main board (101) and the two side plates (102) enclose an active space (6) for the lifting of the scissor-type lifting mechanism (13).

3. A height-adjustable punch press guardrail with safety interlock protection according to claim 2, characterized in that, The two side plates (102) are provided with lugs (103) at one end near the workbench (3), and the fixing frame (1) is installed on the edge of the workbench (3) through the lugs (103).

4. A height-adjustable punch press guardrail with safety interlock protection according to claim 2, characterized in that, The scissor lift mechanism (13) includes a scissor arm assembly and a pneumatic push rod (7). The scissor arm assembly includes two scissor arms (8), which are connected by a pin to form a cross structure. One end of one scissor arm (8) is hinged to the main board (101), and the other end is hinged to a slider (9). One end of the other scissor arm (8) is hinged to the movable guardrail (2), and the other end is hinged to a slider (10). The piston rod of the pneumatic push rod (7) is connected to the slider (10).

5. A height-adjustable punch press guardrail with safety interlock protection according to claim 4, characterized in that, The movable guardrail (2) is provided with a slide rail (11), and the slider (9) is slidably connected to the slide rail (11).

6. A height-adjustable punch press guardrail with safety interlock protection according to claim 4, characterized in that, The main board (101) is provided with a slide rail two (12), and the pneumatic push rod (7) pushes the slider two (10) to slide on the slide rail two (12).

7. A height-adjustable punch press guardrail with safety interlock protection according to claim 5, characterized in that, The movable protective railing (2) includes a top mounting strip (201), a protective net (202), and a bottom mounting strip (203). The top mounting strip (201), the protective net (202), and the bottom mounting strip (203) are connected in sequence to form an inverted cover structure. The slide rail (11) is installed on the top mounting strip (201), and the pin (5) is installed on the bottom mounting strip (203).

8. A height-adjustable punch press guardrail with safety interlock protection according to claim 1, characterized in that, The safety switch (4) is embedded in the bottom of the mounting bracket (1).

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