A liftable safety door for punch presses

Abstract

This utility model belongs to the technical field of mechanical processing equipment, and proposes a liftable safety door for a punch press. It includes a drive cylinder, a top beam, a connecting seat, a door frame, a transparent door panel, a guide device, a column, and a buffer device. The top of the buffer device supports the bottom of the door frame. A fixed clamping plate is provided at the bottom of the door frame, and a rubber pad is provided between the fixed clamping plate and the door frame. A movable clamping plate is provided on top of the fixed clamping plate, and the movable clamping plate is connected to the fixed clamping plate by a hinge. Side plates are provided on both sides of the recess, and insert plates are provided on the top of the side plates for interlocking. The insert plates and the movable clamping plate are used to clamp the transparent door panel. This utility model utilizes the rubber pad to shield burrs punched out during the punching process. The movable clamping plate can cooperate with the insert plates to clamp the transparent door panel, facilitating the disassembly and assembly of the transparent door panel for cleaning and wiping. The buffer device can buffer the inertia of the door frame during descent, which helps improve the connection performance between the drive cylinder and the door frame.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical processing equipment, and relates to punch presses, and more particularly to a liftable safety door for punch presses. Background Technology

[0002] A punch press is a mechanical device used for stamping processes. It saves materials and energy compared to traditional machining, and is highly efficient. It does not require high operator skills, and through the application of various molds, it can produce products that cannot be achieved by machining. Because a punch press generates a large amount of pressure during the stamping process, appropriate safety protection measures are generally adopted to prevent workers from accidentally extending their arms into the stamping range when loading materials. These measures include safety doors that can be raised and lowered synchronously with the stamping action.

[0003] Currently, safety doors for punch presses are driven by cylinders. The timing of the cylinder's lifting and lowering action is consistent with the timing of the punch press's stamping action. For example, the existing patent CN205167637U discloses a punch press with a pneumatic safety door, which includes a machine body, an upper worktable, and a lower worktable. The punch press with the pneumatic safety door also includes a safety door, a drive device, and a slide rail. The two sides of the safety door are slidably mounted on the machine body via the slide rail, and the safety door can cover or expose the working space between the upper worktable and the lower worktable by sliding on the slide rail. The drive device is mounted on the machine body and connected to the safety door to drive the safety door to slide along the slide rail. However, there are some problems with safety doors in actual use. First, the lifting stroke of the safety door cannot be too long, otherwise it will affect manual loading. Second, there may be burrs splashing out when the safety door is at its lower limit. Third, the transparent resin panel of the safety door is not easy to clean, and you need to reach in to clean and wipe it, which is inefficient. Fourth, the safety door will have a certain inertia at the end of its descent. Since the safety door and the cylinder move very frequently, the reliability of the connection between the cylinder and the safety door needs to be considered. Utility Model Content

[0004] This utility model addresses the technical problems of the aforementioned safety doors by proposing a liftable safety door for punch presses that is reasonably designed, highly secure, provides good protection, and is easy to clean.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a liftable safety door for a punch press, including a drive cylinder mounted on a top beam. The extension end of the drive cylinder faces downwards and is provided with a connecting seat. The connecting seat is mounted on a door frame. A transparent door panel is also provided on the front of the door frame. Guide devices are provided on both sides of the door frame, and the guide devices are mounted on columns. The top of the columns is connected to the top beam. Buffer devices are provided on both sides of the columns. The top supports the bottom of the door frame, and a fixed clamp is provided at the bottom of the door frame. Bolts are provided on the fixed clamp to connect the door frame and the fixed clamp. A rubber pad is provided between the fixed clamp and the door frame. A movable clamp is provided on the top of the fixed clamp. The movable clamp is connected to the fixed clamp by a hinge. A recess is provided on the door frame for installing a transparent door panel. Side plates are provided on both sides of the recess. A plug plate is provided on the top of the side plate to engage with it. The plug plate and the movable clamp are used to hold the transparent door panel.

[0006] Preferably, the side plate has a lower insertion port at the top, the insertion plate has a U-shaped longitudinal section and upper insertion ports on both sides that mate with the lower insertion port, the insertion plate has a hook at the top, and the back of the door frame has a slot that rubs against the hook.

[0007] Preferably, the front side of the insert plate is provided with a handle.

[0008] Preferably, the buffer device includes a buffer seat, a spring is provided inside the buffer seat, a piston rod is provided on the top of the spring, and a movable clamp is provided on the top of the piston rod, the movable clamp being in vertical cooperation with the column.

[0009] Preferably, the guiding device includes a guide rod, a fixing block is provided on the top of the guide rod, a pair of sliders that are spaced apart vertically and connected to the door frame are provided on the guide rod, the sliders are provided with guide holes, a plurality of evenly distributed C-shaped grooves are provided on the edge of the guide holes, a plurality of balls are provided in the C-shaped grooves, the spherical surface of the balls rolls and supports the guide rod, and a sealing cap is provided on the top of the slider and connected to it by screws.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0011] This utility model provides a liftable safety door for punch presses. A rubber pad installed along the lower edge of the door frame effectively shields against burrs produced during punching. A fixed clamp not only secures the rubber pad but also hinges to a movable clamp, providing a center of rotation for the movable clamp. The movable clamp, in conjunction with an insert plate, holds the transparent door panel, facilitating its removal for cleaning and wiping. A buffer device cushions the inertia of the descending door frame, improving the connection performance between the drive cylinder and the door frame. This device is rationally designed, highly safe, provides good protection, and is easy to clean, making it suitable for large-scale deployment. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 An isometric view of a liftable safety door for a punch press on a punch press slide rail, provided as an embodiment;

[0014] Figure 2 A front view of a liftable safety door for a punch press provided in an embodiment;

[0015] Figure 3 A rear view of a liftable safety door for a punch press provided as an embodiment;

[0016] Figure 4 A cross-sectional view of a liftable safety door for a punch press in the EE direction provided in the embodiment;

[0017] Figure 5 Exploded view of the door frame, transparent door panel, slider, fixed clamp, movable clamp, and insert plate;

[0018] Figure 6 A cross-sectional view of the buffer device provided in the embodiment;

[0019] In the above figures, 1. Drive cylinder; 2. Top beam; 3. Connecting seat; 4. Door frame; 41. Side plate; 42. Lower insertion port; 43. Slot; 44. Recessed groove; 5. Transparent door panel; 6. Guide device; 61. Guide rod; 62. Fixing block; 63. Sliding block; 64. C-shaped column groove; 65. Ball bearing; 66. Sealing cover; 7. Column; 8. Buffer device; 81. Buffer seat; 82. Spring; 83. Piston rod; 84. Movable clamp; 9. Fixed clamping plate; 10. Bolt; 11. Rubber pad; 12. Movable clamping plate; 13. Insert plate; 131. Upper insertion port; 132. Hook; 133. Handle head. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Examples, such as Figures 1-6 As shown, this utility model provides a liftable safety door for a punch press, including a drive cylinder 1, which is mounted on a top beam 2. The telescopic end of the drive cylinder 1 faces downward and is connected to a connecting seat 3 by bolts / screws. The connecting seat 3 is mounted on a door frame 4. A transparent door panel 5 is also provided on the front of the door frame 4. Guide devices 6 are provided on both sides of the door frame 4, and the guide devices 6 are mounted on columns 7. The top of the columns 7 is connected to the top beam 2. Buffer devices 8 are provided on both sides of the columns 7. The top of the buffer devices 8 is used to support the bottom of the door frame 4. A fixed clamping plate 9 is provided at the bottom of the frame 4. Bolts 10 are provided on the fixed clamping plate 9 to connect the door frame 4 and the fixed clamping plate 9. A rubber pad 11 is provided between the fixed clamping plate 9 and the door frame 4. A movable clamping plate 12 is provided at the top of the fixed clamping plate 9. The movable clamping plate 12 is connected to the fixed clamping plate 9 by a hinge. A recessed groove 44 is provided on the door frame 4 for installing a transparent door panel. Side plates 41 are provided on both sides of the recessed groove 44. An insert plate 13 is provided on the top of the side plate 41 to engage with it. The insert plate 13 and the movable clamping plate 12 are used to clamp the transparent door panel 5.

[0023] Specifically, by installing a rubber pad 11 along the lower edge of the door frame 4, this device expands the protection range of the safety door after it descends, especially by shielding against burrs punched out during the stamping process, thus improving the safety door's protective performance. Furthermore, the fixed clamping plate 9 not only secures the rubber pad 11 but also forms a hinged connection with the movable clamping plate 12, providing a rotation center for the movable clamping plate 12 and facilitating manual flipping of the movable clamping plate 12. The movable clamping plate 12 and the insert plate 13 are positioned on the front of the bottom edge and the front of the top edge of the transparent door panel 5 through flipping and inserting, thereby clamping the transparent door panel 5. For subsequent cleaning and wiping, the movable clamping plate 12 can be flipped down, and the insert plate 13 removed from above, allowing the transparent door panel 5 to be removed from the door frame 4 for cleaning and wiping without having to reach into the punch press's working area. The buffer device 8 buffers the inertia of the descending door frame 4, which helps improve the connection performance between the drive cylinder 1 and the door frame 4.

[0024] To improve the practicality of the insert plate 13, the side plate 41 provided by this utility model has a lower insertion port 42 at its top. The longitudinal section of the insert plate 13 is U-shaped, and its two sides are provided with upper insertion ports 131 that mate with the lower insertion port 42. The top of the insert plate 13 is provided with a hook 132, and the back of the door frame 4 is provided with a slot 43 that rubs against the hook 132. The bottom edge of the side plate 41 is designed with an angle to avoid hitting the head of the staff. The edge of the upper insertion port 131 on the top edge of the side plate 41 is flush with the surface of the transparent door panel 5. When the insert plate 13 is inserted into the side plate 41, the surface of the insert plate 13 will be attached to the front side of the top edge of the transparent door panel 5, thereby playing a clamping role. The hook 132 and the slot 43 can increase the friction between the insert plate 13 and the door frame 4, which is beneficial to improving the stability of the insert plate 13 on the door frame 4.

[0025] To facilitate the placement and removal of the insert plate 13, this utility model provides a handle 133 on the front side of the insert plate 13 that can be manually gripped.

[0026] To improve the cooperation performance between the buffer device 8 and the door frame 4, the buffer device 8 provided by this utility model includes a buffer seat 81. A spring 82 is installed inside the buffer seat 81, a piston rod 83 is installed on the top of the spring 82, and a movable clamp 84 is installed on the top of the piston rod 83. The movable clamp 84 is vertically movable in cooperation with the column 7. The movable clamp 84 can be U-shaped and positioned on the column surface of the column 7, with its top surface facing the top surface of the door frame 4. During the extension of the door frame 4 by the drive cylinder 1 to its lowest point, the movable clamp 84 is compressed, causing the spring 82 to undergo elastic deformation, thereby achieving buffering. This helps reduce the impact of inertia on the connection node between the drive cylinder 1 and the door frame 4, thus ensuring the reliability of the connection between the drive cylinder 1 and the door frame 4 at the connecting seat 3.

[0027] To improve the smoothness of the door frame 4 moving up and down along the guide device 6, the guide device 6 provided by this utility model includes a guide rod 61, a fixing block 62 at the top of the guide rod 61, and a pair of sliders 63 spaced vertically on the guide rod 61 and connected to the door frame 4. Each slider 63 has a guide hole, and multiple evenly distributed C-shaped grooves 64 are provided around the guide hole. Multiple balls 65 are placed in the C-shaped grooves, and the spherical surfaces of the balls 65 provide rolling support to the guide rod 61. A sealing cap 66, connected to the top of the slider 63 by screws, is provided on the top of the slider 63. In this way, the contact between the slider 63 and the guide rod 61 becomes point contact, forming an effective guiding node, which helps to reduce the friction between the slider 63 and the guide rod 61, thereby improving the smoothness of the door frame 4 moving up and down along the guide rod 61.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A liftable safety door for a punch press, comprising a drive cylinder mounted on a top beam, the extension end of the drive cylinder facing downwards and having a connecting seat, the connecting seat being mounted on a door frame, a transparent door panel being provided on the front of the door frame, guide devices being provided on both sides of the door frame, the guide devices being mounted on columns, the top of the columns being connected to the top beam, characterized in that, The uprights are equipped with buffer devices on both sides. The top of the buffer devices supports the bottom of the door frame. A fixed clamping plate is provided at the bottom of the door frame. Bolts connecting the door frame and the fixed clamping plate are provided on the fixed clamping plate. A rubber pad is provided between the fixed clamping plate and the door frame. A movable clamping plate is provided on the top of the fixed clamping plate. The movable clamping plate is connected to the fixed clamping plate by a hinge. A recess for installing a transparent door panel is provided on the door frame. Side plates are provided on both sides of the recess. Insert plates are provided on the top of the side plates for interlocking with them. The insert plates and the movable clamping plate are used to clamp the transparent door panel.

2. The adjustable safety door for a punch press according to claim 1, characterized in that, The top of the side panel is provided with a lower insertion port, the longitudinal section of the insertion plate is U-shaped and the two sides are provided with upper insertion ports that cooperate with the lower insertion port, the top of the insertion plate is provided with a hook, and the back of the door frame is provided with a slot that rubs against the hook.

3. A height-adjustable safety door for a punch press according to claim 2, characterized in that, A handle is provided on the front side of the insert plate.

4. A height-adjustable safety door for a punch press according to claim 3, characterized in that, The buffer device includes a buffer seat, inside which a spring is installed. A piston rod is installed on the top of the spring, and a movable clamp is installed on the top of the piston rod. The movable clamp is in vertical cooperation with the column.

5. A height-adjustable safety door for a punch press according to claim 1, characterized in that, The guiding device includes a guide rod, a fixing block at the top of the guide rod, a pair of sliders spaced vertically on the guide rod and connected to the door frame, a guide hole on the slider, a plurality of evenly distributed C-shaped grooves on the edge of the guide hole, a plurality of balls in the C-shaped grooves, the spherical surface of the balls rollingly supporting the guide rod, and a sealing cap connected to the top of the slider by screws.

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