A turnable trestle

Abstract

This utility model provides a reusable trestle, relating to the field of trestle technology. It includes a supporting cage with an automatic locking mechanism on top. The automatic locking mechanism includes two railings, each with its bottom surface fixedly connected to the upper surface of the supporting cage. A long shaft is rotatably connected to the inner wall of one railing, and a movable door is fixedly connected to the outer surface of the long shaft. A first connecting plate is fixedly connected to the left side of the movable door. A first return spring is fixedly connected to the inner wall of the other railing, with a baffle fixedly connected to one end of the first return spring. The left side of the baffle contacts the right side of the first connecting plate. In this reusable trestle, when the worker stops applying force to the movable door, the door resets. The first connecting plate pushes the baffle back into the railing and compresses the first return spring. At this point, the bolt, under the action of a second return spring, relocks into the horizontal rectangular padlock, completing the self-locking operation.

Description

Technical Field

[0001] This utility model relates to a trestle, specifically a reusable trestle, and belongs to the field of trestle technology. Background Technology

[0002] Trellises are widely used before backfilling underground storage trenches to connect the trench slopes with the roof slab. They are made of steel, with I-beams as the main keel and square steel as the secondary keel, providing good stability.

[0003] Currently, existing trestle bridges are closed and locked using movable gates and locks to prevent unauthorized personnel from entering the construction site. However, some workers forget to lock the gates after crossing the trestle bridge, posing a significant safety hazard. Therefore, this paper proposes a reusable trestle bridge. Utility Model Content

[0004] This invention proposes a reusable trestle to solve the problem in the prior art that the movable door cannot be automatically closed.

[0005] This utility model is achieved through the following technical solution: a reusable trestle, including a support cage, wherein an automatic locking mechanism is provided above the support cage. The automatic locking mechanism includes two guardrails, the bottom surface of each guardrail being fixedly connected to the upper surface of the supporting cage. A long shaft is rotatably connected to the inner wall of one guardrail, and a movable door is fixedly connected to the outer surface of the long shaft. A first connecting plate is fixedly connected to the left side of the movable door. A first return spring is fixedly connected to the inner wall of the other guardrail, and a baffle is fixedly connected to one end of the first return spring. The left side of the baffle contacts the right side of the first connecting plate. A horizontally opening rectangular padlock, a second connecting plate, and a support plate are fixedly connected to the left side of the other guardrail. A bolt is provided inside the horizontally opening rectangular padlock, located within the cavities of the first and second connecting plates. A rectangular plate is fixedly connected to the outer surface of the bolt. A second return spring is fixedly connected to the bottom end of the bolt and the top end of the support plate.

[0006] The bottom surface of the bolt is fixedly connected to a positioning shaft, and the outer surface of the positioning shaft is slidably connected to the inside of the support plate.

[0007] The upper and lower surfaces of the baffle are fixedly connected with sliding blocks, and the outer surface of each sliding block is slidably connected to the inside of another guardrail.

[0008] The bottom surface of the supporting cage is fixedly connected with four sets of fixing bolts, and each set of fixing bolts has two bolts.

[0009] A rectangular box is fixedly connected to the upper surface of one of the guardrails. A circular cylinder is fixedly connected to the inner wall of the rectangular box. A third return spring is fixedly connected to the inner wall of the circular cylinder. A sliding plate is fixedly connected to one end of the third return spring. A transmission rope is fixedly connected to the left side of the sliding plate. The outer surface of the transmission rope is fixedly connected to the outer surface of the long shaft.

[0010] The inner wall of the other guardrail is rotatably connected to two limiting shafts, the outer surface of each limiting shaft being in contact with the outer surface of the transmission rope.

[0011] This utility model provides a reusable trestle bridge, which has the following beneficial effects: This reusable trestle features a horizontally opening rectangular padlock that locks the first and second connecting plates, preventing unauthorized personnel from opening the movable door. When a worker wants to open the door, they simply insert a key into the padlock and push the rectangular plate downwards, removing the bolt from the first connecting plate. Then, a pulling force is applied to the door, causing it to rotate along its long axis. This rotation simultaneously rotates the first connecting plate, which is no longer in contact with the baffle. The baffle then moves above the bolt under the action of a first return spring, limiting the bolt and preventing it from relocking into the padlock. When the worker stops applying force, the door resets, and the first connecting plate pushes the baffle back into the railing, compressing the first return spring. The bolt then relocks into the padlock under the action of a second return spring, completing the self-locking mechanism. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the movable door of this utility model; Figure 3 This is a schematic diagram of the structure of the first connecting plate of this utility model; Figure 4 This is a schematic diagram of the structure of the second reset spring of this utility model; Figure 5 This is a schematic diagram of the structure of the third reset spring of this utility model.

[0013] Explanation of reference numerals in the attached figures 1. Support the cage bones; 2. Automatic locking mechanism; 201. Guardrail; 202. Movable door; 203. Long shaft; 204. Horizontal rectangular padlock; 205. First connecting plate; 206. Second connecting plate; 207. Rectangular plate; 208. Positioning shaft; 209. Support plate; 210. Second return spring; 211. Locking bolt; 212. Baffle; 213. First return spring; 3. Fixing bolt; 4. Sliding block; 5. Transmission rope; 6. Limiting shaft; 7. Rectangular box; 8. Circular cylinder; 9. Sliding plate; 10. Third return spring. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0015] Please see Figures 1-4 This utility model provides a reusable trestle, including a support cage 1. An automatic locking mechanism 2 is provided above the support cage 1. The automatic locking mechanism 2 includes two guardrails 201. The bottom surface of each guardrail 201 is fixedly connected to the upper surface of the support cage 1. A long shaft 203 is rotatably connected to the inner wall of one guardrail 201. A movable door 202 is fixedly connected to the outer surface of the long shaft 203. A first connecting plate 205 is fixedly connected to the left side of the movable door 202. A first return spring is fixedly connected to the inner wall of the other guardrail 201. 213, one end of the first return spring 213 is fixedly connected to a baffle 212, the left side of the baffle 212 is in contact with the right side of the first connecting plate 205, and the left side of the other guardrail 201 is fixedly connected to a horizontal rectangular padlock 204, a second connecting plate 206 and a support plate 209 respectively. The bottom surface of the bolt 211 is fixedly connected to a positioning shaft 208, and the outer surface of the positioning shaft 208 is slidably connected to the inside of the support plate 209. By setting the positioning shaft 208, the movement position of the bolt 211 can be limited.

[0016] Please see Figure 4 The horizontal rectangular padlock 204 has a bolt 211 inside. The bolt 211 is located in the inner cavity of the first connecting plate 205 and the second connecting plate 206. A rectangular plate 207 is fixedly connected to the outer surface of the bolt 211. Sliding blocks 4 are fixedly connected to the upper and lower surfaces of the baffle 212. The outer surface of each sliding block 4 is slidably connected to the inside of another guardrail 201. By setting the sliding blocks 4, it can be ensured that the baffle 212 moves towards the bolt 211 when it moves.

[0017] Please see Figure 4 The bottom end of the locking bolt 211 and the top end of the support plate 209 are jointly fixedly connected to the second return spring 210. The bottom surface of the support cage 1 is fixedly connected to four sets of fixing bolts 3, each set of fixing bolts 3 having two bolts. By setting the fixing bolts 3, the equipment can be fixed in a suitable working position.

[0018] Please see Figure 5 A rectangular box 7 is fixedly connected to the upper surface of one of the guardrails 201. A circular cylinder 8 is fixedly connected to the inner wall of the rectangular box 7. A third reset spring 10 is fixedly connected to the inner wall of the circular cylinder 8. A sliding plate 9 is fixedly connected to one end of the third reset spring 10. A transmission rope 5 is fixedly connected to the left side of the sliding plate 9. The outer surface of the transmission rope 5 is fixedly connected to the outer surface of the long shaft 203. By setting the third reset spring 10, the movable door 202 can be driven to complete the reset work.

[0019] Please see Figure 5 Another guardrail 201 has two limiting shafts 6 rotatably connected to its inner wall. The outer surface of each limiting shaft 6 is in contact with the outer surface of the transmission rope 5. By setting the limiting shafts 6, the movement position of the transmission rope 5 can be limited.

[0020] In use, the horizontally opening rectangular padlock 204 locks the first connecting plate 205 and the second connecting plate 206, preventing unauthorized personnel from opening the movable door 202. When a worker opens the movable door 202, they simply insert the key into the horizontally opening rectangular padlock 204 and push the rectangular plate 207 downwards, so that the bolt 211 is not inside the first connecting plate 205. Then, a pulling force is applied to the movable door 202, causing it to rotate around the long axis 203. As the long axis 203 rotates, the transmission rope 5 wraps around its surface, thus pulling the third return spring 10. When the movable door 202 rotates, it simultaneously drives the first connecting plate 205 to rotate. At this time, the first connecting plate 205 is no longer in contact with the baffle 212, and the baffle 212 moves under the action of the first return spring 213. The bolt 211 is moved above the locking bolt 211, limiting its position and preventing it from relocking into the horizontal rectangular padlock 204. At this time, the worker can stop applying downward pressure to the rectangular plate 207. When the worker enters above the support cage 1, no pulling force is applied to the movable door 202. Similarly, the third return spring 10, which is indirectly connected to the movable door 202, will also perform a reset operation. During the reset process, the third return spring 10 will drive the movable door 202 to reset synchronously. At this time, the first connecting plate 205 will push the baffle 212 back into the guardrail 201 and squeeze the first return spring 213. The bolt 211 will then relock into the first connecting plate 205, the second connecting plate 206, and the horizontal rectangular padlock 204 under the action of the second return spring 210, completing the self-locking process. The worker no longer needs to lock the door.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A turnable trestle comprising a supporting cage (1), characterized in that: An automatic locking mechanism (2) is provided above the support cage (1); The automatic locking mechanism (2) includes two guardrails (201), the bottom surface of each guardrail (201) is fixedly connected to the upper surface of the supporting cage (1), the inner wall of one guardrail (201) is rotatably connected to a long shaft (203), the outer surface of the long shaft (203) is fixedly connected to a movable door (202), the left side of the movable door (202) is fixedly connected to a first connecting plate (205), the inner wall of the other guardrail (201) is fixedly connected to a first return spring (213), one end of the first return spring (213) is fixedly connected to a baffle (212), the baffle (212) The left side of the railing (201) is in contact with the right side of the first connecting plate (205). The left side of the other railing (201) is fixedly connected with a horizontal rectangular padlock (204), a second connecting plate (206) and a support plate (209). The horizontal rectangular padlock (204) is provided with a bolt (211). The bolt (211) is located in the inner cavity of the first connecting plate (205) and the second connecting plate (206). The outer surface of the bolt (211) is fixedly connected with a rectangular plate (207). The bottom end of the bolt (211) and the top end of the support plate (209) are fixedly connected with a second return spring (210).

2. A turnable wharf according to claim 1, characterized in that: The bottom surface of the bolt (211) is fixedly connected to a positioning shaft (208), and the outer surface of the positioning shaft (208) is slidably connected to the inside of the support plate (209).

3. A turn-around apron as claimed in claim 1, wherein: The upper and lower surfaces of the baffle (212) are fixedly connected with sliding blocks (4), and the outer surface of each sliding block (4) is slidably connected to the interior of another guardrail (201).

4. A turn-around apron as claimed in claim 1, wherein: The inner wall of the supporting cage (1) is threaded with four sets of fixing bolts (3), and each set of fixing bolts (3) consists of two bolts.

5. A turn-around apron as claimed in claim 1, wherein: A rectangular box (7) is fixedly connected to the upper surface of one of the guardrails (201). A circular cylinder (8) is fixedly connected to the inner wall of the rectangular box (7). A third reset spring (10) is fixedly connected to the inner wall of the circular cylinder (8). A sliding plate (9) is fixedly connected to one end of the third reset spring (10). A transmission rope (5) is fixedly connected to the left side of the sliding plate (9). The outer surface of the transmission rope (5) is fixedly connected to the outer surface of the long shaft (203).

6. A reusable trestle bridge according to claim 5, characterized in that: Another guardrail (201) has two limiting shafts (6) rotatably connected to its inner wall, and the outer surface of each limiting shaft (6) is in contact with the outer surface of the transmission rope (5).

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