Pedal-type unlocking and normally-opening door device

Abstract

The utility model discloses a pedal unlocking normally-opened door device which comprises a guide rail, a door body, a track, a pulley, a lock catch and a pedal assembly, the track is obliquely arranged towards the guide rail, the pulley is arranged at the bottom of the door body, the door body is connected with the track in a sliding mode through the pulley, a guide groove is formed in the guide rail, the door body is arranged in the guide groove, the lock catch is arranged on the door body, and the pedal assembly is arranged on the guide rail. The pedal assembly is arranged at the higher end of the track and locked with the lock catch in a matched mode. The inclined rail is adopted to provide potential energy for movement of the door body, the door body is normally opened, the spring bolt and the lock catch are of a pedal unlocking structure, and operation is convenient. The pulleys arranged in a single row are matched with the wear-resisting plate and the guide plate, so that the wear-resisting plate is always in contact with the guide plate, and the door body slowly slides by utilizing the friction force between the wear-resisting plate and the guide plate. The buffer block is arranged on the fixed seat, impact generated during door closing is reduced, the lock catch is protected against damage, and meanwhile energy is stored through the buffer block to provide initial power for door opening.

Description

Technical Field

[0001] This utility model relates to the field of cranes, and in particular to a foot-operated unlocking normally open door device. Background Technology

[0002] On cranes, operator safety is paramount. Common manual sliding doors require operators to reach and turn the handle. This is particularly problematic in crane and factory environments where workers often carry items and must put them down during opening, leading to inefficiency and safety hazards. Utility Model Content

[0003] To address the shortcomings of existing technologies, the main objective of this utility model is to overcome these deficiencies by disclosing a foot-operated unlocking device for normally open doors. The device includes a guide rail, a door body, a track, pulleys, a latch, and a foot pedal assembly. The track is inclined towards the guide rail, the pulleys are located at the bottom of the door body, and the door body is slidably connected to the track via the pulleys. A guide groove is provided on the guide rail, and the door body is placed within the guide groove. The latch is located on the door body, and the foot pedal assembly is located at the higher end of the track. The foot pedal assembly engages with the latch for locking.

[0004] Furthermore, the inclination angle α between the track and the horizontal plane is 2±0.5°.

[0005] Furthermore, guide plates are provided on both sides of the guide groove.

[0006] Furthermore, a wear-resistant plate is provided on the door body.

[0007] Furthermore, the foot pedal assembly includes a fixed base, a foot pedal, and a locking tongue. The locking tongue is rotatably mounted on the fixed base, and the foot pedal is connected to the locking tongue, thereby driving the locking tongue to rotate using the foot pedal.

[0008] Furthermore, a limiting block is provided on the fixed base to limit the rotation angle of the locking tongue.

[0009] Furthermore, a buffer block is provided on the fixed base.

[0010] Furthermore, the height position of the buffer block corresponds to the position of the latch.

[0011] Furthermore, the buffer block is a rubber pad.

[0012] Furthermore, the pulleys are arranged in a straight line.

[0013] The beneficial effects achieved by this utility model are:

[0014] This invention employs an inclined track to provide the door with the potential energy for movement, enabling the door to remain open. The latch and buckle utilize a foot-operated unlocking mechanism for convenient operation. A single row of pulleys, along with wear-resistant plates and guide plates, ensures constant contact between the wear-resistant plates and guide plates, utilizing the friction between them to guarantee slow door sliding. A buffer block is installed on the fixed base to reduce the impact during closing, protecting the buckle from damage. Simultaneously, the buffer block stores energy to provide the initial power for opening the door. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a foot-operated normally open unlocking device according to the present invention;

[0016] Figure 2 for Figure 1 The main view;

[0017] Figure 3 This is a structural diagram of the foot pedal assembly;

[0018] The attached figures are labeled as follows:

[0019] 1. Guide rail, 2. Gate body, 3. Track, 4. Pulley, 5. Lock, 6. Foot pedal assembly, 11. Guide groove, 12. Guide plate, 21. Wear-resistant plate, 61. Fixing base, 62. Foot pedal, 63. Lock tongue, 64. Limiting block, 65. Buffer block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0021] A foot-operated unlocking device for normally open doors, such as Figure 1-Figure 3 As shown, the structure includes a guide rail 1, a door 2, a track 3, pulleys 4, a latch 5, and a foot pedal assembly 6. The guide rail 1 and track 3 are mounted on a crane. A guide groove 11 is provided on the guide rail 1, and the door 2 is guided and connected to the guide rail 1; that is, the guide groove 11 guides the door 2 to move horizontally. The pulleys 4 are located at the bottom of the door 2, and the door 2 moves on the track 3 via the pulleys 4. The track 3 is inclined towards the guide rail 1. The latch 5 is mounted on the door 2, and the foot pedal assembly 6 is located at the higher end of the track 3. The foot pedal assembly 6 is fixed to the latch 5, thus closing the door 1. Specifically, when closing the door, the door 2 is pushed along the track 3 and moves towards the foot pedal assembly 6, so that the door 2 is at the higher end of the track 3. The foot pedal assembly 6 then engages the latch 5, closing the door 2. When opening the door, the foot pedal assembly 6 unlocks the latch 5. Because the track 3 is inclined, the door 2 uses its own potential energy to move towards the lower end of the track 3, automatically opening the door 2.

[0022] In one embodiment, such as Figure 1-Figure 3 As shown, at least two pulleys 4 are provided and arranged in a straight line.

[0023] In one embodiment, such as Figure 1-Figure 3 As shown, the inclination angle α between track 3 and the horizontal plane is 2±0.5°. After the latch 5 is opened, the door 2 can open under its own weight. The door 2 slides along track 3, and the guide rail 1 guides the sliding direction to ensure that the door 2 does not tilt.

[0024] In one embodiment, such as Figure 1-Figure 3 As shown, guide plates 12 are provided on both sides of the guide groove 11. The door body 2 contacts the guide plates 12, thereby avoiding contact with the guide rail 1. Specifically, the guide plates 12 are fastened to the inside of the guide groove 11 by screws.

[0025] In one embodiment, such as Figure 1-Figure 3 As shown, a wear-resistant plate 21 is installed on the door body 2. The wear-resistant plate 21 is installed to prevent the door body 2 from contacting the guide rail 1.

[0026] In one embodiment, such as Figure 1-Figure 3 As shown, the foot pedal assembly 6 includes a fixed base 61, a foot pedal 62, and a locking tongue 63. The locking tongue 63 is rotatably mounted on the fixed base 61. The foot pedal 62 is connected to the locking tongue 63, and the foot pedal 62 drives the locking tongue 63 to rotate. The foot pedal 62 and the locking tongue 63 form a lever structure. By stepping on the foot pedal 62, the locking tongue 63 is driven to rotate and tilt upwards, thus separating the locking tongue 63 from the latch 5. One end of the locking tongue 63 is heavier than one end of the foot pedal 62; therefore, the locking tongue 63 rotates counterclockwise using its own weight.

[0027] In the above embodiments, such as Figure 1-Figure 3 As shown, the locking tongue 63 is connected to the fixed base 61 via a torsion spring, and the torsion spring provides a restoring force to the locking tongue 63.

[0028] In the above embodiments, such as Figure 1-Figure 3 As shown, a guide portion is provided on the latch 63. The guide portion is a bevel. The guide portion cooperates with the latch 5 to guide the latch 63 to engage with the latch 5.

[0029] In one embodiment, such as Figure 1-Figure 3 As shown, a limiting block 64 is provided on the fixed base 61 to limit the rotation angle of the locking tongue 63. This prevents the locking tongue 63 from rotating excessively and failing to return to its original position.

[0030] In one embodiment, such as Figure 1-Figure 3 As shown, a buffer block 65 is provided on the fixing base 61. Preferably, the buffer block 65 is a rubber pad. Figure 1-Figure 3As shown, the buffer block 65 reduces the impact when the door closes, protects the latch from damage, and extends its lifespan. Additionally, the buffer block 65 stores energy so that when the bolt 63 unlocks, it provides an initial thrust to the door 2, facilitating its movement.

[0031] In the above embodiments, such as Figure 1-Figure 3 As shown, the height of the buffer block 65 corresponds to the position of the latch 5.

[0032] When using this utility model, such as Figure 1-Figure 3 As shown, when a staff member needs to open the door, they only need to step on foot pedal 62 to disengage the latch 63 from the latch 5. The door 2 then moves along the track 3 and guide groove 11, opening the door 2, which remains open at all times. To close the door, the staff member needs to push the door 2 towards the foot pedal assembly 6 until the latch 5 locks with the latch 63, completing the closing process.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of implementation of the present utility model. Any modifications or equivalent substitutions to the present utility model without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present utility model.

Claims

1. A foot-operated unlocking device for normally open doors, characterized in that, The device includes a guide rail, a door, a track, pulleys, a latch, and a foot pedal assembly. The track is inclined toward the guide rail, the pulleys are located at the bottom of the door, and the door is slidably connected to the track via the pulleys. The guide rail has a guide groove, and the door is placed in the guide groove. The latch is located on the door, and the foot pedal assembly is located at the higher end of the track. The foot pedal assembly cooperates with the latch to lock the door in place.

2. The foot-operated unlocking normally open door device according to claim 1, characterized in that, The inclination angle α between the track and the horizontal plane is 2 ± 0.5°.

3. The foot-operated unlocking normally open door device according to claim 1, characterized in that, Guide plates are provided on both sides of the guide groove.

4. A foot-operated unlocking normally open door device according to claim 1, characterized in that, The door is fitted with a wear-resistant plate.

5. A foot-operated unlocking normally open door device according to claim 1, characterized in that, The foot pedal assembly includes a fixed base, a foot pedal, and a locking tongue. The locking tongue is rotatably mounted on the fixed base, and the foot pedal is connected to the locking tongue, thereby driving the locking tongue to rotate.

6. A foot-operated unlocking normally open door device according to claim 5, characterized in that, A limiting block is provided on the fixed base to limit the rotation angle of the locking tongue.

7. A foot-operated unlocking normally open door device according to claim 5, characterized in that, A buffer block is provided on the fixed base.

8. A foot-operated unlocking normally open door device according to claim 7, characterized in that, The height of the buffer block corresponds to the position of the latch.

9. A foot-operated unlocking device for normally open doors according to claim 7, characterized in that, The buffer block is a rubber pad.

10. A foot-operated unlocking normally open door device according to claim 1, characterized in that, The pulleys are arranged in a straight line.

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