Safety fixing clamp for ladder

Abstract

The utility model relates to the technical field of ladder safety fixing, and discloses a ladder safety fixing clamp which comprises a shell, a clamping part and a U-shaped limiting piece. A handle is formed at the bottom of the shell, a fixed clamping head of the clamping part is fixed on the front side of the shell, a movable clamping head of the clamping part is correspondingly arranged on the front side of the fixed clamping head, the U-shaped limiting piece is arranged on the rear side of the shell and limits the ladder, and the clamping device further comprises a clamping control structure, and under the action of the clamping control structure, the movable clamping head does linear motion in the front-back direction; and the long rack adjusting structure is arranged in the shell, and the position of the U-shaped limiting piece is adjusted in the front-back direction through the long rack adjusting structure. Compared with the prior art, the ladder clamp has the advantages that the ladder clamp is simple and convenient to operate, the clamping part can be suitable for eaves with different thicknesses and ladders with different shapes, the applicability is higher, the clamping part clamps more tightly, the fixing effect is more excellent, in addition, the ladder clamp can protect safety of a user during climbing operation, and the reliability, the convenience and the safety are higher.

Description

Technical Field

[0001] This utility model relates to the field of ladder safety fixing technology, specifically to a ladder safety fixing clamp. Background Technology

[0002] When we need to perform high-altitude work outdoors, such as roof repairs or snow shoveling, we need to set up ladders against the wall as temporary access. However, the ladders rely entirely on friction to stay in place. If they slip or shift, the person on the ladder may fall and get injured, which is very dangerous and poses a serious safety risk.

[0003] Under current circumstances, after people carry out outdoor high-altitude work and set up ladders, one person below will assist them by holding and securing the ladder to prevent it from tipping over and causing the climber to fall and get injured. However, this method requires more people to work, and the two people need to cooperate with each other, which is very troublesome and wastes manpower and time. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned technical difficulties and provide a ladder safety fixing clamp, which can fix the ladder to the wall and adjust the position of the limiting rod through the cooperation of the long rack and pinion, and lock and automatically reset under the action of the spring. The fixing operation is simpler and more convenient. In addition, it has an F-type woodworking clamp head that can clamp eaves of different thicknesses.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A ladder safety fixing clamp includes a housing, a clamping part, and a U-shaped limiting member; a handle is formed at the bottom of the housing, a fixed clamp of the clamping part is fixed to the front side of the housing, and a movable clamp of the clamping part is correspondingly disposed in front of the fixed clamp; the U-shaped limiting member is disposed on the rear side of the housing to limit the ladder, and further includes:

[0007] The clamping control structure allows the moving chuck to move linearly in the front-back direction under its action.

[0008] The long rack and pinion adjustment structure is located inside the housing, and the U-shaped limiting component is adjusted in the front and rear directions through the long rack and pinion adjustment structure.

[0009] 1. The long rack adjustment structure includes a slider, a short rack, a long rack, and a locking cam. The slider is a U-shaped plate structure with its opening facing backward and is slidably disposed inside the outer shell. The crossbar section of the U-shaped limiting member is simultaneously movably sleeved on the left and right side plates of the slider. The front end of the long rack is fixed on the outer shell, and the rear end is movably sleeved on the front side wall of the slider. A sleeve is formed at the top of the slider, and the short rack is movably sleeved inside the sleeve, with its bottom meshing with the long rack. The top is connected to the top wall of the slider through a link, and a connecting rod is formed at the top. The connecting rod passes through the top wall of the slider and is hinged to the locking cam. After the locking cam flips forward, the short rack disengages from the long rack, and the slider can slide freely back and forth.

[0010] 2. Both the long and short racks have unidirectional ratchet structures, and after they mesh with each other, the slider cannot move backward along the long rack. At the same time, the front side wall of the slider is connected to the outer shell by two connections, and the two connections are sleeved on the long rack. After the locking cam flips forward, the short rack disengages from the long rack, and the slider moves backward under the action of the two connections.

[0011] It also includes a pair of plates, which are mirror images of each other on the inner side of the slider and fixed at the front end to the slider. Springs are respectively provided between the two plates and the inner wall of the slider. The crossbar section of the U-shaped limiting member is simultaneously movably sleeved in the two C-shaped locking plates and the two springs, and is in frictional cooperation with the two C-shaped locking plates. The position of the U-shaped limiting member is adjusted in the left and right directions by the two C-shaped locking plates.

[0012] The clamping part also includes an I-shaped rod and pressure blocks. The I-shaped rod is arranged in the front-back direction and is slidably disposed in the housing. The movable chuck is fixed to the front end of the I-shaped rod. The two pressure blocks are respectively fixed to the bottom of the movable chuck and the fixed chuck. The clamping surfaces of the pressure blocks are inclined and the clamping surfaces of the two pressure blocks cooperate with each other.

[0013] The clamping control structure includes a wrench, a pressing block, and a return lever. The wrench, pressing block, and return lever are movably sleeved on the I-shaped rod, and the wrench is located on the front side of the handle and hinged to the outer shell. The return lever is in frictional engagement with the I-shaped rod, preventing the I-shaped rod from moving forward. When the return lever is moved, the I-shaped rod can move freely back and forth. When the wrench is pressed, the pressing block is pressed backward and in frictional engagement with the I-shaped rod, which in turn drives the I-shaped rod to move backward.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] 1. The clamping part of this utility model is set as an F-type woodworking clamp, which can clamp a larger thickness and is suitable for eaves of different thicknesses. It also has a better clamping effect, stronger applicability, and higher safety.

[0016] 2. The limiting rod of this utility model adjusts and fixes its position by means of a long rack and pinion adjustment structure. Under the action of the spring, it can be locked in one direction and reset in the opposite direction. It is simple to operate and more convenient and quick to use.

[0017] 3. This utility model is equipped with a clamping control structure. Through the cooperation of the I-shaped rod and the extrusion block in the clamping control structure, the clamping part can automatically clamp and fix the eaves, making it more convenient and faster to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the clamping control structure of this utility model.

[0020] Figure 3 This is a partial structural cross-sectional schematic diagram of this utility model.

[0021] Figure 4 This is a schematic diagram of the long rack and pinion adjustment structure of this utility model.

[0022] Figure 5 This is a cross-sectional schematic diagram of the present invention.

[0023] As shown in the figure: 1. Outer shell; 2. Fixed chuck; 3. Moving chuck; 4. I-beam; 5. U-shaped limiter; 6. Slider; 7. Short rack; 8. Long rack; 9. Positioning plate; 10. Locking cam; 11. Sleeve; 12. C-shaped locking piece; 13. Slide groove; 14. Handle; 15. Wrench; 16. Reduction lever; 17. Pressing block; 18. Pressure block; 19. Connecting rod; 20. Spring 1; 21. Spring 2; 22. Spring 3; 23. Spring 4; 24. Spring 5; 25. Positioning pin. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] A ladder safety clamp, such as Figure 1 As shown, its main body includes a shell 1, a clamping part, and a U-shaped limiting member 5. The shell 1 contains a clamping control structure and a long rack adjustment structure to control and adjust the clamping part and the U-shaped limiting member 5. A handle 14 is formed at the bottom of the shell 1 for gripping. The U-shaped limiting member 5 is located on the rear side of the shell 1, and grooves 13 are pre-reserved on both sides of the shell 1 (the grooves 13 form an angle of approximately 15° with the horizontal direction). The U-shaped limiting member 5 is slidably disposed in the grooves 13 on both sides. The clamping part is located on the front side of the shell 1 and is an F-type woodworking clamp, as detailed below. Figure 2 As shown, the clamping part includes a fixed clamp 2, a movable clamp 3, an I-shaped rod 4, and pressure blocks 18. The I-shaped rod 4 is arranged along the front-back direction and is slidably disposed inside the outer casing 1. The movable clamp 3 is fixed to the front end of the I-shaped rod 4, and the fixed clamp 2 is fixed to the front side of the outer casing 1. The movable clamp 3 and the fixed clamp 2 are arranged correspondingly and are respectively arranged perpendicular to the I-shaped rod 4 (the movable clamp 3 moves linearly along the front-back direction with the I-shaped rod 4). The two pressure blocks 18 are respectively fixed to the bottom of the movable clamp 3 and the fixed clamp 2, and the clamping surfaces are both inclined (the inclination angle is about 5°) and cooperate with each other (the clamping surfaces of the two pressure blocks 18 are always arranged parallel to each other). At the same time, the clamping surfaces of the two pressure blocks 18 are provided with anti-slip textures.

[0027] The clamping control structure is housed within the outer casing 1, and as follows: Figure 2 As shown, the device includes a wrench 15, a pressing block 17, and a reducing lever 16. A U-shaped positioning plate 9 is fixed inside the outer casing 1, and the positioning plate 9 is arranged on the upper side of the I-shaped rod. A positioning pin 25 is formed on the inner wall of the outer casing 1, and the positioning pin 25 is located inside the positioning plate 9. The wrench 15, pressing block 17, and reducing lever 16 are movably sleeved on the I-shaped rod 4. The wrench 15 is located on the front side of the handle 14, and its top passes through the outer casing 1 and is movably sleeved on the positioning pin 25. The pressing block 17 is arranged on the rear side of the wrench 15, and its rear sidewall is connected to the outer casing 1 via a spring 23. The top of the front sidewall abuts against the positioning plate 9, and the bottom is against the upper side of the wrench 15. The formed protrusions abut against each other. After the wrench 15 is flipped and pressed backward, the bottom of the pressing block 17 tilts backward and rubs against the I-shaped rod 4, and moves backward together with the I-shaped rod 4. After the movement is completed, the pressing block 17 slides forward along the I-shaped rod 4 under the action of the spring 23. The restoring lever 16 is set on the rear side of the outer shell 1, and its bottom passes through the outer shell 1. After the top of the restoring lever 16 is connected to the rear side wall of the outer shell 1 through the spring 24, the top tilts forward and rubs against the I-shaped rod 4 to prevent the I-shaped rod 4 from moving forward. After the restoring lever 16 is moved, the I-shaped rod 4 is movably sleeved in the restoring lever 16 and can slide freely back and forth. The F-type woodworking clamp (clamping part and clamping control structure) and its usage method mentioned above are all existing mature technologies.

[0028] The U-shaped limiting component 5 is a rod structure with a hexagonal cross-section, and the side rod is arranged parallel to the slide groove 13. The long rack adjustment structure is as follows: Figure 3 , 4 As shown, the device includes a slider 6, a short rack 7, a long rack 8, and a locking cam 10. The slider 6 is a U-shaped plate structure with its opening facing rearward and is slidably disposed within the outer casing 1. A square sleeve 11 is fixed to its top. The crossbar segment of the U-shaped limiting member 5 is simultaneously movably sleeved on the left and right side plates of the slider 6. The front end of the long rack 8 is fixed to the outer casing 1, and its rear end is movably sleeved on the front side wall of the slider 6. The front side wall of the slider 6 is connected to the outer casing 1 by a second spring 21, which is sleeved on the long rack 8. The short rack 7 is movably sleeved within the sleeve 11, with its bottom engaging with the long rack 8. Its top is connected to the top wall of the slider 6 by a first spring 20. A connecting rod 19 is formed at the top, which passes through the top wall of the slider 6 and is hinged to the root of the locking cam 10 (e.g., ...). Figure 5 As shown, the root of the locking cam 10 is a circular wheel structure with a gradually increasing radius, which abuts against the top of the slider 6. After the locking cam 10 flips forward, the short rack 7 disengages from the long rack 8, and the slider 6 slides and returns to the rear side under the action of the spring 21. It is worth noting that the teeth of the long rack 8 and the short rack 7 are both one-way ratchet structures, and after they mesh with each other, the slider 6 cannot move backward along the long rack 8.

[0029] It also includes C-type locking plates 12 and springs 22; a pair of C-type locking plates 12 are mirror images of each other on the inner side of the slider 6, and springs 22 are respectively provided between them and the inner wall of the slider 6, and the front end is fixed on the slider 6. The crossbar section of the U-shaped limiting member 5 is simultaneously movably sleeved in the two C-type locking plates 12 and the two springs 22, and is in frictional engagement with the two C-type locking plates 12.

[0030] In the specific implementation of this embodiment:

[0031] Erect the ladder against the wall and climb the ladder while holding this new type of tool. When you reach the eaves, take out this new type of tool and place the eaves between the two pressure blocks 18 of the F-type woodworking clamp. Press the wrench 15 to push the pressing block 17 backward. The bottom of the pressing block 17 tilts backward and rubs against the I-shaped rod 4, simultaneously moving the I-shaped rod 4 backward. After the movement is complete, the pressing block 17 slides forward along the I-shaped rod 4 under the action of the spring 23, and the I-shaped rod 4 is returned to its original position. 16 is locked and cannot move forward until the eaves are tightly clamped between the two pressure blocks 18. Press the two C-shaped locking pieces 12 on the rear side to disengage the U-shaped limiting piece 5 from the friction lock of the C-shaped locking piece 12. Pull the U-shaped limiting piece 5 left and right until the inner side of one side of the rod is in contact with the outer wall of the ladder vertical rod. Push the U-shaped limiting piece 5 forward so that the ladder vertical rod is fastened to the inner side of the U-shaped limiting piece 5. The ladder (including ladders with rectangular or circular cross-sections of vertical rods) is firmly fixed to the eaves by this new invention.

[0032] After use, use the ladder to return to the ground. When your chest reaches the eaves, flip up the locking cam 10, and the short rack 7 moves upward to disengage from the long rack 8. The slider 6 moves backward along the slide groove under the action of the spring 21, releasing the U-shaped limit piece 5 from fixing the ladder. Then, hold the handle 14 and move the rear reset lever 16 to release the F-type woodworking clamp from the locked state. Remove it from the eaves and finally carefully and safely return to the ground.

[0033] Depending on the specific circumstances, multiple copies of this new type can be used simultaneously on one ladder to enhance the stability of the ladder.

[0034] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A ladder safety fixing clamp, comprising a housing (1), a clamping part, and a U-shaped limiting member (5); a handle (14) is formed at the bottom of the housing (1), a fixed clamp (2) of the clamping part is fixed to the front side of the housing (1), and a movable clamp (3) of the clamping part is correspondingly disposed in front of the fixed clamp (2), and the U-shaped limiting member (5) is disposed on the rear side of the housing (1) to limit the ladder, characterized in that, Also includes: The clamping control structure, under the action of the clamping control structure, moves the chuck (3) in a straight line along the front and back direction; The long rack adjustment structure is set inside the outer shell (1), and the U-shaped limiting member (5) is adjusted in the front and rear directions through the long rack adjustment structure.

2. The ladder safety fixing clamp according to claim 1, characterized in that: The long rack adjustment structure includes a slider (6), a short rack (7), a long rack (8), and a locking cam (10). The slider (6) is a U-shaped plate structure with the opening facing backward and is slidably set inside the outer shell (1). The crossbar section of the U-shaped limiting member (5) is simultaneously movably sleeved on the left and right side plates of the slider (6). The front end of the long rack (8) is fixed on the outer shell (1), and the rear end is movably sleeved on the front side wall of the slider (6). The bottom of the short rack (7) meshes with the long rack (8), and a connecting rod (19) is formed at the top and connected to the top wall of the slider (6) through a spring (20). The connecting rod (19) passes through the top wall of the slider (6) and is hinged to the locking cam (10). After the locking cam (10) flips forward, the short rack (7) disengages from the long rack (8).

3. A ladder safety fixing clamp according to claim 2, characterized in that: It also includes a sleeve (11), which is fixed on the top wall of the slider (6), and the short rack (7) is movably sleeved inside the sleeve (11).

4. A ladder safety fixing clamp according to claim 2, characterized in that: The teeth of both the long rack (8) and the short rack (7) are unidirectional ratchet structures, and after they mesh with each other, the slider (6) cannot move backward along the long rack (8).

5. A ladder safety fixing clamp according to claim 4, characterized in that: The front sidewall of the slider (6) is connected to the outer shell (1) by a second spring (21), and the second spring (21) is sleeved on the long rack (8).

6. A ladder safety fixing clamp according to claim 2, characterized in that: It also includes C-type locking pieces (12), a pair of which are mirror images of each other on the inner side of the slider (6), and the front end is fixed on the slider (6). The crossbar section of the U-shaped limiting piece (5) is simultaneously movably sleeved in the two C-type locking pieces (12) and is in frictional cooperation with the two C-type locking pieces (12). The position of the U-shaped limiting piece (5) is adjusted in the left and right directions through the two C-type locking pieces (12).

7. A ladder safety fixing clamp according to claim 6, characterized in that: Springs 3 (22) are respectively provided between the two C-type locking pieces (12) and the inner wall of the slider (6).

8. A ladder safety fixing clamp according to claim 1, characterized in that: The clamping part also includes an I-shaped rod (4) and a pressure block (18). The I-shaped rod (4) is arranged in the front-back direction and is slidably disposed in the outer shell (1). The movable chuck (3) is fixed at the front end of the I-shaped rod (4). The two pressure blocks (18) are respectively fixed at the bottom of the movable chuck (3) and the fixed chuck (2). The clamping surfaces of the pressure blocks (18) are inclined and the clamping surfaces of the two pressure blocks (18) cooperate with each other.

9. A ladder safety fixing clamp according to claim 8, characterized in that: The clamping control structure includes a wrench (15), a pressing block (17), and a return lever (16). The wrench (15), pressing block (18), and return lever (16) are respectively movably sleeved on the I-shaped rod (4). The wrench (15) is located on the front side of the handle (14) and hinged to the outer shell (1). The return lever (16) is in frictional engagement with the I-shaped rod (4), and the I-shaped rod (4) cannot move forward. After the wrench (15) is pressed, the pressing block (17) is in frictional engagement with the I-shaped rod (4) and drives the I-shaped rod (4) to move backward.

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