Ladder box limiting and locking mechanism

Abstract

A ladder stand box limiting and locking mechanism relates to the field of buildings and comprises a supporting frame, the supporting frame comprises a back plate, a left plate and a right plate are welded to the back plate, the left plate and the right plate are arranged in parallel, the left plate and the right plate are in sliding fit with a front clamping plate, a locking assembly is arranged between the front clamping plate and the back plate, and the locking assembly is connected with the back plate through a connecting rod. Fastening mechanisms are installed on the left plate and the right plate, the fastening mechanisms can abut against the surface of a rectangular steel pipe of a climbing box body, the back plate and the front clamping plate clamp the rectangular steel pipe through a locking assembly, and the front clamping plate is connected with a hoop through a connecting plate. The supporting frame provides a firm installation foundation, and the rectangular steel pipe is ensured to be stably fixed through sliding fit of the front clamping plate and firm clamping of the locking assembly; the stability and the friction force between the locking mechanism and the wall-attached support steel pipe are enhanced through the additional arrangement of the hoop; and due to the design of the rubber damping layer, the anti-seismic performance of the mechanism is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction, in particular to a position limiting locking mechanism for a ladder box. Background Art

[0002] During the inspection or maintenance of civil air defense facilities, it is often necessary to work at heights. In order to ensure the safety of operators, equipment such as safety ladder boxes are usually used. The safety ladder box not only provides a relatively stable and safe operating platform for workers, but also reduces the risk of working at heights to a certain extent. However, during the installation process, the existing safety ladder box mainly relies on welding technology to connect the wall rod and the ladder box. Specifically, this method usually involves welding a steel pipe to a steel plate, and then tightly connecting the steel plate to the safety ladder with bolts. Although this connection method can meet the basic installation requirements of the safety ladder box, after long-term use and practice, it has been found that it has the following obvious shortcomings:

[0003] First, since welding points and bolts are the key parts of the connection, when the safety ladder is affected by external forces, such as strong winds and other natural factors, all the tension will be concentrated on the bolts and welding points. This concentration of force will greatly reduce the stability of the entire structure and may even cause structural damage, thus endangering the life safety of the operator. In addition, a large amount of heat will be generated during the welding process, resulting in residual stress inside the steel. These residual stresses may gradually be released during long-term use, causing adverse effects on the mechanical properties of the steel, such as reducing the strength and toughness of the steel. More seriously, the release of this residual stress may cause structural safety problems and increase the risk of the safety ladder box during use. Utility Model Content

[0004] The purpose of the utility model is to solve the problems raised in the above background technology, and then propose a ladder box limit locking mechanism.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A limit locking mechanism for a ladder box comprises a support frame, the support frame comprises a back plate, a left plate and a right plate are welded on the back plate, the left plate and the right plate are arranged in parallel, the left plate and the right plate are slidably matched with a front clamping plate, a locking assembly is provided between the front clamping plate and the back plate, a fastening mechanism is installed on the left and right plates, the fastening mechanism can be abutted against the surface of a rectangular steel pipe of a climbing box body, the back plate and the front clamping plate clamp the rectangular steel pipe with the help of the locking assembly, and the front clamping plate is connected with a clamp through a connecting plate.

[0007] Furthermore, the left plate is provided with a rectangular slide groove, in which a front clamping plate is slidably fitted, and the left plate is also provided with a plurality of positioning and mounting holes.

[0008] Furthermore, the locking assembly includes a locking screw, a first nut and a second nut. The back plate is provided with a first hole, and the front clamping plate is provided with a second hole. The locking screw passes through the first hole and the second hole and is locked and fixed by the first nut and the second nut.

[0009] Furthermore, the first nut and the second nut are respectively located on both sides of the back plate and the front clamping plate.

[0010] Furthermore, the fastening mechanism includes a fastening screw, an anti-slip pressure plate, a third nut and a fourth nut. A fastening bolt is installed in the positioning mounting hole, anti-slip pressure plates are installed at the ends of the two fastening bolts, and a third nut and a fourth nut are installed on the fastening bolts. The third nut and the fourth nut are respectively located on both sides of the left plate or the right plate.

[0011] Furthermore, the clamp includes a left clamp and a right clamp, the left clamp includes a left arc-shaped plate, both ends of the left arc-shaped plate are provided with left connecting plates, the right clamp includes a right arc-shaped plate, both ends of the right arc-shaped plate are provided with right connecting plates, and the left connecting plate and the right connecting plate are locked and fixed by a fifth bolt and a fifth nut.

[0012] Furthermore, the left arc plate and the right arc plate are both provided with a rubber shock-absorbing layer.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the stable structure of the support frame of the utility model provides a solid installation foundation, ensuring the rigidity and stability of the locking mechanism; the sliding fit of the fastening mechanism and the front clamping plate and the firm clamping of the locking assembly ensure both the flexibility of use and the firm fixation of the rectangular steel pipe; the addition of the clamp enhances the stability and friction between the locking mechanism and the steel pipe of the wall bracket; and the design of the rubber shock-absorbing layer effectively improves the seismic performance of the mechanism and ensures the safety and comfort of the use process. Overall, this locking mechanism meets the multiple requirements of stability, flexibility, safety and seismic resistance in a simple and efficient way. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 is a schematic diagram of the structure of the clamp;

[0016] Figure 3 is a structural schematic diagram of the support frame;

[0017] Among them: 100 rectangular steel pipe, 1 back plate, 2 left plate, 21 positioning mounting hole, 22 rectangular slide groove, 3 right plate, 4 front clamping plate, 5 fastening mechanism, 51 anti-slip pressure plate, 52 third nut, 53 fourth nut, 54 fastening screw, 6 locking assembly, 61 locking screw, 62 first nut, 63 second nut, 7 connecting plate, 8 clamp, 81 left arc plate, 82 left connecting plate, 83 right arc plate, 84 right connecting plate, 85 fifth bolt, 86 fifth nut, 87 rubber shock-absorbing layer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The utility model is further described in combination with the drawings and embodiments:

[0019] like Figure 1-Figure 3 As shown, a ladder box limit locking mechanism includes a support frame, the support frame includes a back plate 1, the back plate is used as the main supporting structure, and the back plate is welded with a left plate 2 and a right plate 3 to enhance the stability of the overall structure. This design not only ensures the rigidity of the locking mechanism, but also provides a solid installation foundation for the subsequent front clamping plate and locking assembly. This structural design can provide a stable support to ensure that the locking mechanism will not be deformed or loosened during use.

[0020] The left plate and the right plate are arranged in parallel, and the left plate and the right plate are slidably matched with the front clamping plate 4. The sliding matching design between the front clamping plate and the left plate and the right plate enables the front clamping plate to move freely in the rectangular slide grooves of the left plate and the right plate. This design facilitates the adjustment of the position of the front clamping plate according to actual conditions to achieve the best locking effect.

[0021] A locking assembly 6 is provided between the front clamping plate and the back plate, and a fastening mechanism 5 is installed on the left plate and the right plate. The fastening mechanism can be against the surface of the rectangular steel pipe 100 of the climbing box, and the back plate and the front clamping plate clamp the rectangular steel pipe with the help of the locking assembly. The front clamping plate is connected to a clamp 8 through a connecting plate 7. A locking assembly is provided between the back plate and the front clamping plate, which can firmly clamp the rectangular steel pipe in the middle to prevent it from sliding or shifting during use.

[0022] In at least one embodiment, Figure 3 As shown, the left plate has the same structure as the right plate. Taking the left plate as an example, a rectangular slide groove 22 is provided on the left plate, and a front clamping plate is slidably fitted in the rectangular slide groove. A plurality of positioning and mounting holes 21 are also provided on the left plate.

[0023] Furthermore, the locking assembly is the core part of the locking mechanism, and the locking assembly includes a locking screw 61, a first nut 62 and a second nut 63. In cooperation with the locking assembly, a first hole is provided on the back plate, and a second hole is provided on the front clamping plate. The locking screw passes through the first hole and the second hole and is then locked and fixed by the first nut and the second nut. This design allows the locking force to be evenly and firmly distributed on the rectangular steel pipe, effectively preventing it from sliding or rotating. The simple and efficient design of the locking assembly ensures that the rectangular steel pipe can be stably and reliably fixed.

[0024] The solution is refined, the first nut and the second nut are respectively located on both sides of the back plate and the front clamping plate, and the rectangular steel pipe of the climbing box is clamped by the two nuts.

[0025] In order to further enhance the stability of the locking mechanism, both the left and right plates are provided with fastening mechanisms, such as Figure 1 As shown, the fastening mechanism includes a fastening screw 54, an anti-skid pressure plate 51, a third nut 52 and a fourth nut 53. A fastening bolt is installed in the positioning installation hole, and anti-skid pressure plates are installed at the ends of the two fastening bolts. The third nut 52 and the fourth nut 53 are installed on the fastening bolt, and the third nut 52 and the fourth nut 53 are respectively located on both sides of the left plate 2 or the right plate 3. The design of the fastening mechanism not only increases the friction between the locking mechanism and the rectangular steel pipe, but also improves the overall stability and safety.

[0026] In at least one embodiment, the clamp includes a left clamp and a right clamp, the left clamp includes a left arc plate 81, both ends of the left arc plate are provided with left connecting plates 82, the right clamp includes a right arc plate 83, both ends of the right arc plate are provided with right connecting plates 84, and the left connecting plate and the right connecting plate are locked and fixed by a fifth bolt 85 and a fifth nut 86. The arc plate design of the left clamp and the right clamp can better adapt to the shape of the steel pipe of the wall bracket, thereby improving the clamping effect and stability of the clamp.

[0027] Furthermore, the left curved plate and the right curved plate are both provided with a rubber shock-absorbing layer 87. The rubber shock-absorbing layer can consume part of the load under high wind load or repetitive wind load conditions, and change the node into an elastic-plastic node, thereby reducing the force of the load on the ladder box and improving the seismic performance and safety of the mechanism.

[0028] Working method, first, fix the back plate in the appropriate position, and the back plate has the welded left plate and right plate. Make sure that the left plate and the right plate are set in parallel to prepare for the sliding fit of the front clamping plate. Slide the front clamping plate into the rectangular slide grooves of the left plate and the right plate. Make sure that the front clamping plate can slide freely in the slide groove for subsequent locking and adjustment. Pass the locking screw through the first hole on the back plate and the second hole on the front clamping plate. Screw the first nut and the second nut on both ends of the locking screw respectively, and gradually tighten them so that the back plate and the front clamping plate can clamp the rectangular steel pipe. Pass the fastening screw through the positioning and mounting holes on the left and right plates. Install the anti-skid pressure plate at the end of the fastening screw to ensure that the anti-skid pressure plate can be close to the surface of the rectangular steel pipe. Install the third nut and the fourth nut on the fastening screw, and tighten them on both sides of the left or right plate respectively to ensure that the fastening mechanism can firmly rest on the rectangular steel pipe. Use the connecting plate to connect the clamp (including the left clamp and the right clamp) to the front clamping plate. Make sure that the arc plates of the left and right clamps can fit tightly against the rectangular steel pipe, and use the fifth bolt and the fifth nut to lock and secure the left and right connecting plates. Check whether all nuts have been tightened to ensure that the entire mechanism is stably and firmly fixed on the rectangular steel pipe. If necessary, the locking assembly and the fastening mechanism can be adjusted appropriately to ensure the best locking effect and stability. Regularly check the fastening of the locking mechanism and the fastening mechanism to ensure that there is no looseness. During use, avoid excessive force or improper operation to prevent damage to the mechanism or affect the locking effect.

[0029] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A ladder box limit locking mechanism, characterized in that: The support frame includes a back plate, a left plate and a right plate are welded on the back plate, the left plate and the right plate are arranged in parallel, the left plate and the right plate are slidably matched with a front clamping plate, a locking assembly is provided between the front clamping plate and the back plate, a fastening mechanism is installed on the left plate and the right plate, the fastening mechanism can be against the rectangular steel pipe surface of the climbing box, the back plate and the front clamping plate clamp the rectangular steel pipe with the help of the locking assembly, and the front clamping plate is connected with a clamp through a connecting plate.

2. The ladder box limit locking mechanism according to claim 1, characterized in that: The left plate is provided with a rectangular slide groove, in which a front clamping plate is slidably fitted, and the left plate is also provided with a plurality of positioning and mounting holes.

3. The ladder box limit locking mechanism according to claim 2, characterized in that: The locking assembly includes a locking screw, a first nut and a second nut. The back plate is provided with a first hole, the front clamping plate is provided with a second hole, and the locking screw passes through the first hole and the second hole and is locked and fixed by the first nut and the second nut.

4. The ladder box limit locking mechanism according to claim 3, characterized in that: The first nut and the second nut are respectively located at two sides of the back plate and the front clamping plate.

5. The ladder box limit locking mechanism according to claim 3, characterized in that: The fastening mechanism includes a fastening screw, an anti-slip pressure plate, a third nut and a fourth nut. A fastening bolt is installed in the positioning mounting hole, and anti-slip pressure plates are installed at the ends of the two fastening bolts. The third nut and the fourth nut are installed on the fastening bolts, and the third nut and the fourth nut are respectively located on both sides of the left plate or the right plate.

6. The ladder box limit locking mechanism according to claim 5, characterized in that: The clamp includes a left clamp and a right clamp, the left clamp includes a left arc-shaped plate, both ends of the left arc-shaped plate are provided with left connecting plates, the right clamp includes a right arc-shaped plate, both ends of the right arc-shaped plate are provided with right connecting plates, and the left connecting plate and the right connecting plate are locked and fixed by a fifth bolt and a fifth nut.

7. The ladder box limit locking mechanism according to claim 6, characterized in that: The left arc plate and the right arc plate are both provided with a rubber shock-absorbing layer.

Images