A revolving door arrangement for a cat ladder

Abstract

The utility model relates to a rotary door device for cat ladder belongs to the safety protection technical field of press machine, including cat ladder and door frame, a plurality of cat ladder protective cages are installed on the cat ladder, the cat ladder protective cage of outermost end is welded with weld block no. 1 and weld block no. 3, the travel switch that guarantees the normal operation of machine through the on or break of installation has on weld block no. 3, the butterfly lock for and the door frame locking is installed on weld block no. 1, the weld block no. 2 that the contact of travel switch is connected is welded on the door frame. The rotary door body of the utility model is in the process of opening and closing, and its movement track is located in the projection range of fixed frame, does not need additional external swing space, especially suitable for the occasion of limited space. Personnel only need to rotate the handle on butterfly lock gently to realize the door frame opening, and the action is smooth, avoids the problem that the flat -open door needs the space of retreating and the sliding door is easy to jam.

Description

Technical Field

[0001] This utility model relates to the field of safety protection technology for presses, specifically to a rotating door device for climbing ladders. Background Technology

[0002] During the production process of a press, personnel are prohibited from climbing ladders to approach the equipment when it is operating under high load. Therefore, a safety door is often installed at the ladder entrance. Existing ladder safety doors are mostly swing-type or sliding-type. Swing-type safety doors require a large external space to open, making them inconvenient to use in confined spaces (such as equipment platforms or narrow shafts), and they may lose their protective function if accidentally opened. Sliding safety doors, on the other hand, require high track precision and are prone to jamming due to deformation or dust accumulation. Therefore, a new type of ladder door is needed that is simple in structure, easy to open, occupies little space, and is safe and reliable. Utility Model Content

[0003] This invention aims to solve the above-mentioned technical problems by providing a revolving door device for climbing ladders.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0005] A revolving door device for climbing ladders includes a ladder and a door frame;

[0006] The ladder is equipped with multiple sets of ladder guard cages;

[0007] The door frame is a U-shaped structure of welded steel pipe components, and a clamp for rotatable connection is installed between the door frame and the climbing ladder cage;

[0008] The outermost ladder cage is welded with welding block one and welding block three. Welding block three is equipped with a limit switch that ensures the normal operation of the machine by turning it on or off. Welding block one is equipped with a butterfly lock for locking with the door frame.

[0009] The door frame is welded with a second welding block that connects to the contacts of the limit switch.

[0010] Preferably, the clamps are provided in two sets.

[0011] Preferably, the clamp includes a pipe clamp, an intermediate pipe clamp, an internal hexagonal screw, a hexagonal nut, and an elastic washer arranged opposite each other. The intermediate pipe clamp is disposed between the two pipe clamps and is fixedly connected by the internal hexagonal screw, the hexagonal nut, and the elastic washer.

[0012] Preferably, the pipe clamp secures the ladder cage, a through hole is formed between the pipe clamp and the intermediate pipe clamp, and the door frame is set in the through hole to achieve a rotatable connection.

[0013] Preferably, the ladder cage and door frame are welded with C-shaped welding blocks to prevent movement.

[0014] Preferably, multiple sets of isolation bars are installed on the door frame.

[0015] Preferably, a connecting plate is installed between the plurality of climbing ladder cages.

[0016] Preferably, the ladder is equipped with an L-shaped bracket and a platform opposite to the ladder cage.

[0017] With the above structure, this utility model has the following advantages:

[0018] 1. Small footprint: During the opening and closing process, the movement trajectory of the revolving door is within the projection range of the fixed frame, without the need for additional external swing space, making it particularly suitable for space-constrained occasions.

[0019] 2. Flexible and convenient opening: The door frame can be opened by simply rotating the butterfly lock handle. The action is smooth and avoids the problems of swing doors requiring backing space and sliding doors being prone to jamming.

[0020] 3. High safety: The rectangular structure allows the door to effectively block the passage when closed. Combined with a reliable limit locking device, it can effectively prevent people from falling accidentally and the door from opening accidentally.

[0021] 4. Simple structure, sturdy and durable: The overall structure is simple with few parts. It is made of metal materials, has high mechanical strength, long service life, and low maintenance cost.

[0022] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a connection diagram of the clamp of this utility model.

[0026] As shown in the figure: 1. Door frame; 2. Clamp; 201. Pipe clamp; 202. Intermediate pipe clamp; 203. Hex socket screw; 204. Hex nut; 3. Isolation rod; 4. Ladder cage; 5. C-shaped welding block; 6. Welding block one; 7. Welding block two; 8. Welding block three; 9. Connecting plate; 10. Ladder; 11. Butterfly lock; 12. Limit switch; 13. L-shaped bracket; 14. Platform. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] The present invention will now be described in further detail in conjunction with the full text.

[0030] Combined with appendix Figure 1 and Figure 2 A revolving door device for a ladder includes a ladder 10 and a door frame 1; multiple sets of ladder guard cages 4 are installed on the ladder 10; the door frame 1 is a U-shaped structure of welded steel pipe components, and its shape is generally consistent with the shape of the ladder guard cages 4, with the spacing between the steel pipes as compact as possible. A clamp 2 for rotatable connection is installed between the door frame 1 and the ladder guard cages 4;

[0031] In a specific implementation of this utility model, welding block 1 6 and welding block 3 8 are welded on the outermost ladder cage 4. A limit switch 12 is installed on welding block 3 8 to ensure the normal operation of the machine by connecting or disconnecting it. A butterfly lock 11 for locking with the door frame 1 is installed on welding block 1 .

[0032] Specifically, a second welding block 7 is welded to the door frame 1, which is connected to the contacts of the limit switch 12. A first welding block 6 is welded to the ladder cage 4, and a butterfly lock 11 is fixed on it. The second welding block 7 is welded to the door frame 1, and its upper surface is used in conjunction with the limit switch 12 to ensure that the limit switch contacts are in full contact with the surface of the second welding block 7. A third welding block 8 is welded to the ladder cage 4, and a limit switch 12 is installed on it. The limit switch 12 is turned on or off to ensure the normal operation of the machine.

[0033] In specific implementation of this utility model, such as Figure 2 As shown, clamp 2 is configured in two sets. Clamp 2 includes a pipe clamp 201, an intermediate pipe clamp 202, an internal hexagonal screw 203, a hexagonal nut 204, and an elastic washer arranged opposite each other. The intermediate pipe clamp 202 is located between the two pipe clamps 201 and is fixedly connected by the internal hexagonal screw 203, the hexagonal nut 204, and the elastic washer. The pipe clamp 201 fixes the ladder cage 4. A through hole is opened between the pipe clamp 201 and the intermediate pipe clamp 202, and the door frame 1 is set in the through hole to achieve a rotatable connection. C-shaped welding blocks 5 are welded on the ladder and the door frame to prevent movement. Specifically, multiple sets of C-shaped welding blocks 5 are arranged on the ladder 4 and the door frame 1, located at the upper and lower ends of clamp 2, to prevent the door frame 1 from moving. The door frame 1 is hinged to the through hole through the clamp 2. The pipe clamp 201 and the intermediate pipe clamp 202 of this device are connected to the ladder. When closed, the butterfly lock 11 locks it. The limit switch fixed on the ladder is turned on. When the machine is running safely and stably, unauthorized personnel cannot enter the machine through the ladder to operate it.

[0034] Multiple sets of isolation bars 3 are installed on the door frame 1. Specifically, the isolation bars 3 can effectively prevent outside personnel from entering the climbing ladder cage 4.

[0035] A connecting plate 9 is installed between multiple climbing ladder cages 4. The connecting plate 9 is used to strengthen the connection strength of multiple climbing ladder cages 4 and to prevent external personnel from entering the climbing ladder cages 4.

[0036] The ladder 10 is opposite to the ladder cage 4 and has an L-shaped bracket 13 and a platform 14 installed.

[0037] The working principle of this utility model:

[0038] The pipe clamp connects the revolving door to the ladder. The door frame rotates around the pipe clamp, and the butterfly lock locks it to the ladder, while the limit switch contacts on the ladder are in full contact with the door frame surface.

[0039] Limit switches are used to control the travel of the door. They activate the contacts of the moving parts of the door to connect or disconnect the control circuit, thus starting or stopping the machine. The revolving door is locked using a butterfly lock. The butterfly lock is designed for quick opening and closing, locking the door tightly and preventing it from easily loosening. This prevents unauthorized opening and protects equipment and personnel.

[0040] The present invention and its embodiments have been described above. This description is not restrictive, and the embodiments shown throughout the text are only one of the embodiments of the present invention. The actual structure is not limited to this. In conclusion, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A revolving door device for climbing ladders, characterized in that, Includes ladder (10) and door frame (1); Multiple sets of ladder guard cages (4) are installed on the ladder (10); The door frame (1) is a U-shaped structure of steel pipe welded components, and a clamp (2) for rotating connection is installed between the door frame (1) and the climbing ladder cage (4). Welding block 1 (6) and welding block 3 (8) are welded on the outermost ladder cage (4). Welding block 3 (8) is equipped with a limit switch (12) that ensures the normal operation of the machine by turning it on or off. Welding block 1 (6) is equipped with a butterfly lock (11) for locking with the door frame (1). The door frame (1) is welded with a second welding block (7) that is connected to the contact of the limit switch (12).

2. The revolving door device for a ladder according to claim 1, characterized in that: The clamp (2) is configured in two sets.

3. The revolving door device for a ladder according to claim 1, characterized in that: The clamp (2) includes a pipe clamp (201) mirror-arranged, an intermediate pipe clamp (202), an internal hexagonal screw (203), a hexagonal nut (204), and an elastic washer. The intermediate pipe clamp (202) is arranged between the two pipe clamps (201) and is fixedly connected by the internal hexagonal screw (203), the hexagonal nut (204), and the elastic washer.

4. The revolving door device for a ladder according to claim 3, characterized in that: The pipe clamp (201) fixes the climbing ladder cage (4), and a through hole is opened between the pipe clamp (201) and the intermediate pipe clamp (202). The door frame (1) is set in the through hole to achieve a rotating connection.

5. A revolving door device for a ladder according to claim 3, characterized in that: The ladder cage (4) and the door frame (1) are welded with C-shaped welding blocks (5) to prevent movement.

6. A revolving door device for climbing ladders according to claim 1, characterized in that: Multiple sets of isolation bars (3) are installed on the door frame (1).

7. A revolving door device for a ladder according to claim 1, characterized in that: A connecting plate (9) is installed between multiple climbing ladder cages (4).

8. A revolving door device for a ladder according to claim 1, characterized in that: The ladder (10) is equipped with an L-shaped bracket (13) and a platform (14) opposite to the ladder cage (4).

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