Ladder with safety hook
By designing a safety hook that is always locked in the ladder, and using elastic parts and guide surfaces to achieve automatic reset and alignment, the existing ladder safety hook is easily failed and the user experience is poor, improving the stability and convenience of the ladder.
Patent Information
- Application Number
- CN202421794740.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-27
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-27
AI Technical Summary
The gravity-type safety hooks in existing ladders are easily affected by the horizontality of the ladder placement surface, resulting in failure. The imaginary position after locking is large and the free swing is large, resulting in the phenomenon of inadequate clamps during the opening and closing of the ladder, which is very poor in the user experience.
A ladder with a safety hook is designed. The safety hook is always locked when the elevator is fully opened. Through the reset mechanism formed by the elastic member and the inclined guide surface, it ensures that the safety hook always remains locked under the action of spring force, and automatically reset and automatically align, simplifying the operation steps.
Effectively prevents the ladder from accidentally folding during use, ensures user safety, improves the stability and user experience of the ladder when fully opened, and is more adaptable and convenient to use.
Smart Images
Figure CN222797448U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a safety hook for a ladder and a ladder using the safety hook for the ladder. Background Art
[0002] Although there are many types of ladder products on the market, the safety hooks are similar. For example, the gravity safety hook relies on the gravity of the safety hook to always point vertically downward to lock / unlock the ladder. Most ladders currently use the "gravity safety hook", which has a simple structure and low cost. However, the actual use of the "gravity safety hook" will be affected by the horizontality of the ladder placement surface, and it is easy to fail. In addition, there is a large void after locking, and the free swing range is large, so the ladder often fails to fit during opening and closing, and the user experience is very poor. Utility Model Content
[0003] The utility model aims to provide a ladder with a safety hook, which is always in a locked state when the ladder is fully opened.
[0004] The purpose of the utility model is achieved in this way:
[0005] A ladder with a safety hook, comprising a front ladder frame, a rear ladder frame, a folding pedal, a support rod and a safety device, wherein the front ladder frame and the rear ladder frame are connected, and the front ladder frame and the rear ladder frame are unfolded or folded with each other;
[0006] The folding pedal comprises an upper pedal and a lower pedal, the upper pedal is movably connected to the front ladder frame near its front end, the upper pedal rotates around the hinge as the rotation center, and the lower pedal is arranged on the front ladder frame at intervals;
[0007] The support rod is arranged on the rear ladder frame, the safety device comprises a safety hook and an elastic member, the safety hook comprises a hook body, a mounting plate and a stop plate, the mounting plate is connected to the hook body, and the stop plate is arranged on the mounting plate;
[0008] The rear end of the upper pedal is provided with a mounting opening, the mounting plate extends out of the mounting opening to form a handle, the stop plate abuts against the inner wall of the upper pedal, the movement of the handle drives the safety hook to rotate, and the stop plate limits the rotation direction of the safety hook;
[0009] The elastic member is arranged between the upper pedal and the safety hook, one end of the elastic member abuts against the inner wall of the upper pedal, and the other end of the elastic member abuts against the hook body, and the elastic member constitutes a reset mechanism of the safety hook;
[0010] After the front ladder frame and the rear ladder frame are unfolded, the upper pedal is rotated, and the upper pedal drives the safety hook to approach the support rod. The support rod overcomes the elastic force of the elastic member and pushes the safety hook to rotate until the support rod enters the opening of the hook body, so that the safety hook and the support rod are locked. The elastic force of the elastic member keeps pushing the safety hook to ensure that the safety hook is always hooked to the support rod. At the same time, the rear end of the upper pedal abuts against the support rod, and the upper pedal is unfolded.
[0011] The handle is lifted up, and the handle overcomes the elastic force of the elastic member to drive the safety hook to rotate until the support rod leaves the opening of the hook body, thereby unlocking the safety hook and the support rod.
[0012] The safety hook is always locked under the action of spring force, ensuring that the ladder is firmly fixed no matter what angle it is placed in. This can effectively prevent the ladder from accidentally folding during use and ensure the safety of the user.
[0013] The safety hook can be unlocked by lifting the handle to realize the folding and unfolding of the ladder. The whole process is simple to operate without complicated steps, and users can easily master and use it.
[0014] Since the design of the safety hook ensures the stability and safety of the ladder when it is fully opened, users do not need to worry about accidental movement or folding of the ladder during use, which improves the overall user experience.
[0015] No matter what angle the ladder is placed at, the safety hook can lock the support rod under the action of spring force, so that the ladder always remains stable. This design allows the ladder to be used in different scenarios and environments, and is more adaptable.
[0016] The elastic member constitutes a reset mechanism of the safety hook, so that the safety hook can automatically reset to the initial position after being unlocked, which is convenient for next use and improves the convenience and efficiency of use.
[0017] The purpose of the utility model can also be solved by the following technical measures:
[0018] Furthermore, the hook body is provided with a guide surface inclined toward the opening direction of the hook body.
[0019] The inclined guide surface helps the support rod slide smoothly into the opening of the hook body when the ladder is unfolded. This design can automatically guide the support rod into the correct position, eliminating the need for users to perform precise alignment and simplifying the operation steps.
[0020] When unfolding the ladder, the user does not need to pay too much attention to the alignment of the support rod. The user only needs to perform basic unfolding movements, and the support rod can naturally slide into the opening of the hook body under the action of the guide surface, which greatly improves the convenience of use.
[0021] The guide surface can effectively reduce the friction and collision between the support rod and the hook body, reduce the wear degree of the components, and extend the service life of the ladder.
[0022] Guided by the guide surface, the support rod can enter the opening of the hook body more firmly, ensuring that the ladder is reliably fixed after being unfolded, thereby further enhancing the safety of use.
[0023] Furthermore, the safety device also includes a lifting glove and a bolt, the mounting plate is provided with a bolt hole, the lifting glove is sleeved on the handle portion, and the bolt passes through the locking bolt hole of the lifting glove to achieve the connection between the lifting glove and the handle portion.
[0024] The setting of the carrying glove can provide a more comfortable grip. The carrying glove is usually made of soft or ergonomically designed materials, which can effectively reduce the user's hand discomfort during operation.
[0025] The tight connection between the lifting cover and the handle can prevent the handle from slipping during operation, improve the stability and accuracy of the user's operation, and ensure the safe use of the ladder.
[0026] The bolt connection method makes the lifting cover easy to remove and replace. When the lifting cover is worn or damaged, the user only needs to loosen the bolts to replace the new lifting cover. The maintenance process is simple and quick, extending the service life of the ladder.
[0027] The bolt passes through the locking bolt hole of the lifting cover to achieve a firm connection between the lifting cover and the handle. This connection method can withstand a large force, ensuring the firmness and reliability of the handle during use, and is not easy to loosen or fall off.
[0028] The introduction of the handle cover not only enhances the functionality, but also improves the overall aesthetics of the ladder by choosing handle covers of different colors and materials, increasing the market appeal of the product.
[0029] Hand grip gloves usually have certain shock absorption and anti-slip functions, which can effectively alleviate the user's sense of vibration during operation, prevent operational errors caused by hand sliding, and improve safety of use.
[0030] Furthermore, the elastic member is a spring.
[0031] Furthermore, the rear end side wall of the upper pedal is provided with the mounting opening, and the size of the mounting opening is larger than the size of the mounting plate.
[0032] Since the size of the installation opening is larger than that of the installation plate, the installation opening forms a swing space for the safety hook. The user can adjust the position of the safety hook within a certain range. When the ladder is unfolded, the safety hook can automatically adjust its position to align with the support rod. This automatic alignment function ensures that the ladder can be automatically locked smoothly during the unfolding process.
[0033] The swing space enables the safety hook to always remain in the best position during the use of the ladder, ensuring that the ladder can be reliably locked after it is unfolded, improving the safety of use and preventing accidental loosening or folding.
[0034] Furthermore, the stop plate is vertically arranged on the mounting plate, and when the elastic member pushes the stop plate to abut against the rear end side wall of the upper pedal, the safety hook is in an initial position.
[0035] The elastic member pushes the stop plate against the rear end side wall of the upper pedal, so that the safety hook can automatically return to the initial position. This design ensures the reset function of the safety hook after each use, which is convenient for the next use and ensures the consistency and convenience of operation.
[0036] Through the action of the elastic member, the safety hook will return to the initial position after each use, thereby preventing use failures or safety hazards caused by the safety hook not being reset, and improving the reliability and safety of operation.
[0037] When the ladder is unfolded, the safety hook waits for the support rod to enter in the initial position. Once the support rod is in place, the safety hook can be quickly locked to provide stable support and fixation. This automatic locking function simplifies user operation and enhances the safety of the ladder.
[0038] The user does not need to manually adjust the position of the safety hook, and the elastic part automatically completes the reset operation, making the unfolding and folding process of the ladder simpler and more efficient. This reduces the operation steps and time and improves the user experience.
[0039] The automatic reset mechanism reduces friction and collision between the safety hook and the support rod, extending the service life of the components. At the same time, it avoids damage caused by forgetting to reset or incorrect operation.
[0040] The elastic member continuously acts on the stop plate, so that the safety hook is always kept in a stable position without being disturbed by external forces, thus ensuring the stability and reliability of the ladder during use.
[0041] Furthermore, the folding pedal further comprises a first connecting rod and a second connecting rod, and the lower pedal is movably connected to the front ladder frame near its front end position;
[0042] The upper end of the first connecting rod is connected to the upper pedal near its rear end, and the lower end of the first connecting rod is connected to the lower pedal near its rear end;
[0043] The upper end of the second connecting rod is connected to the lower pedal near its rear end, and the lower end of the second connecting rod is connected to another lower pedal near its rear end.
[0044] The design of the first connecting rod and the second connecting rod enables the upper pedal and the lower pedal to be unfolded or folded synchronously. This synchronization mechanism ensures the stability and consistency of the pedals when in use, avoiding the inconvenience and safety hazards caused by the pedals being out of sync.
[0045] The user can simultaneously unfold or fold multiple steps with just one action, which greatly improves the operating efficiency, reduces the operating time, and facilitates the user to quickly adjust the status of the ladder.
[0046] The synchronous unfolding and folding mechanism ensures the consistency of the position of each pedal during use, reduces the risk of accidental falling or sliding due to pedal asynchrony, and improves safety in use.
[0047] The beneficial effects of the utility model are as follows:
[0048] The utility model can effectively prevent the ladder from folding accidentally during use, thereby ensuring the safety of users.
[0049] The utility model can unlock the safety hook by lifting the handle to realize the folding and unfolding of the ladder. The whole process is simple to operate without complicated steps, and the user can easily master and use it.
[0050] The utility model can lock the support rod under the action of the spring force no matter at what angle the ladder is placed, so that the ladder always remains stable. This design enables the ladder to be used in different scenes and environments, and has stronger adaptability.
[0051] In the utility model, the elastic member constitutes a reset mechanism of the safety hook, so that the safety hook can automatically reset to the initial position after being unlocked, which is convenient for next use and improves the convenience and efficiency of use.
[0052] In the utility model, the elastic member pushes the stop plate against the rear end side wall of the upper pedal, so that the safety hook can automatically return to the initial position. This design ensures the reset function of the safety hook after each use, which is convenient for the next use and ensures the consistency and convenience of operation.
[0053] In the utility model, the inclined guide surface can help the support rod to smoothly slide into the opening of the hook body when the ladder is unfolded. This design can automatically guide the support rod to the correct position without the user having to perform precise alignment, thus simplifying the operation steps. Moreover, when unfolding the ladder, the user does not need to pay too much attention to the alignment of the support rod, but only needs to perform basic unfolding actions, and the support rod can naturally slide into the opening of the hook body under the action of the guide surface, thus greatly improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS
[0054] Figure 1It is a schematic diagram of the front ladder frame and the rear ladder frame unfolding with each other.
[0055] Figure 2 This is a schematic diagram of the front ladder frame and the rear ladder frame unfolding from another angle.
[0056] Figure 3 This is a schematic diagram of the connection between the upper step and the support rod of a ladder with a safety hook.
[0057] Figure 4 Another angle diagram of the connection between the upper step and the support rod of the ladder with a safety hook.
[0058] Figure 5 This is a schematic diagram of the safety hook.
[0059] Figure 6 This is a schematic diagram of the connection between the safety device and the upper pedal (initial position).
[0060] Figure 7 This is a schematic diagram of the connection between the safety device and the upper pedal (upper pedal rotation).
[0061] Figure 8 This is a schematic diagram of the connection between the safety device and the upper pedal (upper pedal rotation).
[0062] Fig. 9 This is a schematic diagram of the connection between the safety device and the upper pedal (the support rod enters the opening of the hook body).
[0063] Fig.10 for Figure 2 Schematic diagram of part A.
[0064] Fig.11 for Figure 2 Schematic diagram of part A from another angle.
[0065] Fig.12 It is a schematic diagram of the rotation of the safety device (the process of lifting the handle).
[0066] Fig.13 Schematic diagram of the separation of the safety device and the support rod (with the handle lifted up).
[0067] Fig.14 It is a schematic diagram of the front ladder frame and the rear ladder frame folding each other.
[0068] Fig.15 for Fig.14 Enlarged view of part B. DETAILED DESCRIPTION
[0069] Example, combined with Figures 1 to 15As shown, a ladder with a safety hook comprises a front ladder frame 1, a rear ladder frame 2, a folding pedal 3, a support rod 4 and a safety device 5, wherein the front ladder frame 1 and the rear ladder frame 2 are connected, and the front ladder frame 1 and the rear ladder frame 2 are unfolded or folded with each other;
[0070] The folding pedal 3 includes an upper pedal 31 and a lower pedal 32. The upper pedal 31 is movably connected to the front ladder frame 1 near its front end. The upper pedal 31 rotates around the hinge as the rotation center. The lower pedal 32 is arranged on the front ladder frame 1 at intervals.
[0071] The support rod 4 is arranged on the rear ladder frame 2, the safety device 5 includes a safety hook 51 and an elastic member 52, the safety hook 51 includes a hook body 511, a mounting plate 512 and a stop plate 513, the mounting plate 512 is connected to the hook body 511, and the stop plate 513 is arranged on the mounting plate 512;
[0072] The upper pedal 31 has a mounting opening 311 at the rear end thereof, the mounting plate 512 extends out of the mounting opening 311 to form a handle 6, the stop plate 513 abuts against the inner wall of the upper pedal 31, the movement of the handle 6 drives the safety hook 51 to rotate, and the stop plate 513 limits the rotation direction of the safety hook 51;
[0073] The elastic member 52 is disposed between the upper pedal 31 and the safety hook 51, one end of the elastic member 52 abuts against the inner wall of the upper pedal 31, and the other end of the elastic member 52 abuts against the hook body 511, and the elastic member 52 constitutes a reset mechanism of the safety hook 51;
[0074] After the front ladder frame 1 and the rear ladder frame 2 are unfolded, the upper pedal 31 is rotated, and the upper pedal 31 drives the safety hook 51 to approach the support rod 4. The support rod 4 overcomes the elastic force of the elastic member 52 and pushes the safety hook 51 to rotate until the support rod 4 enters the opening of the hook body 511, so that the safety hook 51 and the support rod 4 are locked. The elastic force of the elastic member 52 keeps pushing the safety hook 51 to ensure that the safety hook 51 keeps hooking the support rod 4. At the same time, the rear end of the upper pedal 31 abuts against the support rod 4, and the upper pedal 31 is unfolded.
[0075] The handle 6 is lifted up, and the handle 6 overcomes the elastic force of the elastic member 52 to drive the safety hook 51 to rotate until the support rod 4 leaves the opening of the hook body 511, thereby unlocking the safety hook 51 and the support rod 4.
[0076] Furthermore, the hook body 511 is provided with a guide surface 5111 inclined toward the opening direction of the hook body 511 .
[0077] Furthermore, the safety device 5 also includes a lifting glove 53 and a bolt 54. The mounting plate 512 is provided with a bolt hole 5121. The lifting glove 53 is sleeved on the handle portion 6. The bolt 54 passes through the lifting glove 53 and locks the bolt hole 5121 to achieve the connection between the lifting glove 53 and the handle portion 6.
[0078] Furthermore, the elastic member 52 is a spring.
[0079] Furthermore, the rear end side wall of the upper pedal 31 is provided with the mounting opening 311 , and the size of the mounting opening 311 is larger than the size of the mounting plate 512 .
[0080] Furthermore, the stop plate 513 is vertically arranged on the mounting plate 512 , and when the elastic member 52 pushes the stop plate 513 to abut against the rear end side wall of the upper pedal 31 , the safety hook 51 is in an initial position.
[0081] Furthermore, the folding pedal 3 further includes a first connecting rod 33 and a second connecting rod 34, and the lower pedal 32 is movably connected to the front ladder frame 1 near its front end position;
[0082] The upper end of the first connecting rod 33 is connected to the upper pedal 31 near its rear end, and the lower end of the first connecting rod 33 is connected to the lower pedal 32 near its rear end;
[0083] The upper end of the second connecting rod 34 is connected to the lower pedal 32 near its rear end, and the lower end of the second connecting rod 34 is connected to another lower pedal 32 near its rear end.
[0084] The front ladder frame 1 and the rear ladder frame 2 are unfolded with each other, and the safety hook 51 is hooked to the support rod 4:
[0085] After the front ladder frame 1 and the rear ladder frame 2 are unfolded with each other, the upper pedal 31 is rotated, and the upper pedal 31 drives the safety hook 51 to approach the support rod 4. The support rod 4 overcomes the elastic force of the elastic member 52 and pushes the safety hook 51 to rotate until the support rod 4 enters the opening of the hook body 511, so that the safety hook 51 and the support rod 4 are locked, and the elastic force of the elastic member 52 keeps pushing the safety hook 51, so that the stop plate 513 abuts against the rear end side wall of the upper pedal 31 to ensure that the safety hook 51 is always in a state of locking the support rod 4, and at the same time, the rear end of the upper pedal 31 abuts against the support rod 4, completing the unfolding of the upper pedal 31, and the upper pedal 31 drives the lower pedal 32 to unfold through the first connecting rod 33 and the second connecting rod 34, so that the upper pedal 31 and the lower pedal 32 are unfolded synchronously.
[0086] The front ladder frame 1 and the rear ladder frame 2 are folded together, and the safety hook 51 is hooked to the support rod 4:
[0087] Lift the handle 6, the handle 6 overcomes the elastic force of the elastic member 52 and drives the safety hook 51 to rotate until the support rod 4 leaves the opening of the hook body 511, so that the safety hook 51 and the support rod 4 are unlocked, and the handle 6 is continued to be lifted, the handle 6 drives the upper pedal 31 to rotate, and the upper pedal 31 drives the lower pedal 32 to rotate through the first connecting rod 33 and the second connecting rod 34, so that the upper pedal 31 and the lower pedal 32 are folded, and at the same time, the front ladder frame 1 and the rear ladder frame 2 are driven to fold with each other.
Claims
1. A ladder with a safety hook, comprising a front ladder frame, a rear ladder frame, a folding pedal, a support rod and a safety device, wherein the front ladder frame and the rear ladder frame are connected, and the front ladder frame and the rear ladder frame are mutually unfolded or folded; The folding pedal comprises an upper pedal and a lower pedal, the upper pedal is movably connected to the front ladder frame near its front end, the upper pedal rotates around the hinge as the rotation center, and the lower pedal is arranged on the front ladder frame at intervals; The support rod is arranged on the rear ladder frame, and is characterized in that: The safety device comprises a safety hook and an elastic member, wherein the safety hook comprises a hook body, a mounting plate and a stop plate, wherein the mounting plate is connected to the hook body, and the stop plate is arranged on the mounting plate; The rear end of the upper pedal is provided with a mounting opening, the mounting plate extends out of the mounting opening to form a handle, the stop plate abuts against the inner wall of the upper pedal, the movement of the handle drives the safety hook to rotate, and the stop plate limits the rotation direction of the safety hook; The elastic member is arranged between the upper pedal and the safety hook, one end of the elastic member abuts against the inner wall of the upper pedal, and the other end of the elastic member abuts against the hook body, and the elastic member constitutes a reset mechanism of the safety hook; After the front ladder frame and the rear ladder frame are unfolded, the upper pedal is rotated, and the upper pedal drives the safety hook to approach the support rod. The support rod overcomes the elastic force of the elastic member and pushes the safety hook to rotate until the support rod enters the opening of the hook body, so that the safety hook and the support rod are locked. The elastic force of the elastic member keeps pushing the safety hook to ensure that the safety hook is always hooked to the support rod. At the same time, the rear end of the upper pedal abuts against the support rod, and the upper pedal is unfolded. The handle is lifted up, and the handle overcomes the elastic force of the elastic member to drive the safety hook to rotate until the support rod leaves the opening of the hook body, thereby unlocking the safety hook and the support rod.
2. The ladder with a safety hook according to claim 1, characterized in that: The hook body is provided with a guide surface inclined toward the opening direction of the hook body.
3. The ladder with a safety hook according to claim 1, characterized in that: The safety device also includes a lifting glove and a bolt. The mounting plate is provided with a bolt hole. The lifting glove is sleeved on the handle portion. The bolt passes through the locking bolt hole of the lifting glove to achieve connection between the lifting glove and the handle portion.
4. The ladder with a safety hook according to claim 1, characterized in that: The elastic member is a spring.
5. The ladder with a safety hook according to claim 1, characterized in that: The rear end side wall of the upper pedal is provided with the mounting opening, and the size of the mounting opening is larger than the size of the mounting plate.
6. The ladder with a safety hook according to claim 5, characterized in that: The stop plate is vertically arranged on the mounting plate, and when the elastic member pushes the stop plate to abut against the rear end side wall of the upper pedal, the safety hook is in an initial position.
7. The ladder with a safety hook according to claim 1, characterized in that: The folding pedal further comprises a first connecting rod and a second connecting rod, and the lower pedal is movably connected to the front ladder frame near its front end; The upper end of the first connecting rod is connected to the upper pedal near its rear end, and the lower end of the first connecting rod is connected to the lower pedal near its rear end; The upper end of the second connecting rod is connected to the lower pedal near its rear end, and the lower end of the second connecting rod is connected to another lower pedal near its rear end.