Safety belt ladder locking device

Abstract

The present invention relates to safety equipment. The purpose is to provide a safe and reliable safety belt ladder locking device for ladder climbing. The technical solution is: a safety belt ladder locking device, characterized in that: the device includes a locking device and a safety rope connected to the locking device, the locking device includes a lock body, a clamping mechanism and a guide mechanism; the lock body includes a pair of sub-lock bodies hinged together at one end and a locking rod installed at the other end; one end of the locking rod is hinged to one of the sub-lock bodies and the other end is against the other sub-lock body, and the locking rod is equipped with a reset spring; the clamping mechanism is connected to the lock body, which can open or close a pair of sub-lock bodies; the guide mechanism is connected to the lock body, so that when the lock body moves upward along the ladder side rod, the guide mechanism can cooperate with the ladder cross bar to prevent the lock body from falling.

Description

Technical Field

[0001] The invention relates to safety equipment, in particular to a safety belt ladder locking device for ladder climbing. Background Art

[0002] When people climb ladders, there is a risk of falling. In order to avoid or reduce this risk, the prior art uses a safety belt. One end of the safety belt is connected to the climber, and the other end is connected to a fixed object at a high place or to the ladder. When the person falls from the ladder, the safety belt holds the person's body. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a safe and reliable safety belt ladder locking device for ladder climbing.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a safety belt ladder locking device, characterized in that: the device includes a locking device and a safety rope connected to the locking device, the locking device includes a lock body, a clamping mechanism and a guide mechanism; the lock body includes a pair of sub-lock bodies hinged together at one end and a locking rod installed at the other end; one end of the locking rod is hinged to one of the sub-lock bodies and the other end is abutted against the other sub-lock body, and the locking rod is equipped with a reset spring; the clamping mechanism is connected to the lock body, and can open or close a pair of sub-lock bodies; the guide mechanism is connected to the lock body, so that when the lock body moves upward along the ladder side rod, the guide mechanism can cooperate with the ladder cross bar to prevent the lock body from falling.

[0005] The clamping mechanism includes a pair of clamping jaws, which are hinged on the outer side walls of a pair of sub-locking bodies in a one-to-one manner; the tail ends of the pair of clamping jaws are connected by a threaded assembly, and the threaded assembly can open or close the tail ends of the pair of clamping jaws so that the front ends of the pair of clamping jaws can clamp the pair of sub-locking bodies and maintain a distance between the pair of sub-locking bodies to allow the cross bar to pass.

[0006] The threaded assembly includes a threaded barrel with forward and reverse threads, a forward bolt and a reverse screw respectively fixed at the tail ends of the two clamping jaws and matched with the threads at both ends of the threaded barrel, and a plurality of locking nuts for locking the forward bolt, the reverse screw and the threaded barrel.

[0007] Each sub-lock body comprises an arc portion and a linear portion, and the guide mechanism comprises a pair of guide members arranged in parallel, and the pair of guide members are installed on the linear portions of a pair of sub-lock bodies in a one-to-one manner.

[0008] Each guide member comprises a fixed part fixedly connected to the linear part of the sub-locking body, and a movable part matched with the fixed part and capable of being lifted and lowered relative to the fixed part.

[0009] In the pair of separate lock bodies, the two arc-shaped parts are arranged in a corresponding arc shape, and one end is hinged to each other to form a shape suitable for the cross section of the ladder side bar; the locking rod is installed at the lower end of the arc-shaped part.

[0010] The user opens a pair of sub-lock bodies around their hinge axis and then closes them on the side bar of the ladder. The user activates the clamping mechanism, which clamps the pair of sub-lock bodies. The pair of sub-lock bodies cannot be separated from the side bar, but can be raised and lowered along the side bar. The guide mechanism is located on the inner side of the side bar. The guide mechanism clamps the crossbar of the ladder but can be raised and lowered relative to the crossbar. One end of the safety belt ladder locking device is connected to the user, and the other end is connected to the lock body. The user goes up the ladder, driving the lock body to rise along the side bar. Since the length of the guide mechanism is equal to or greater than the distance between the two crossbars, the guide mechanism clamps at least one crossbar of the ladder, so that the lock body will not rotate around the side bar. During the upward movement of the lock body, the guide mechanism passes on the surface of each crossbar, and each crossbar acts on the lock rod, forcing the lock rod to swing downward; after the lock rod passes each crossbar, under the action of the reset spring, the lock rod is reset and pressed against a sub-lock body. If the user falls, the locking rod cannot swing upwards because it presses against a part of the lock body. Therefore, the locking rod can abut against the corresponding cross bar, so that the locking device is in a locked state and will not move down along the side bar, preventing the user from falling.

[0011] The beneficial effects of the present invention are as follows: the clamping mechanism of the present invention can control the opening of the lock body, so that the lock body can be matched with ladder side bars of different sizes. The guide mechanism can make the entire lock device rise straight along the ladder side bar without deflection, ensuring safety and reliability during use, and providing favorable conditions for users to climb the ladder smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below in conjunction with the accompanying drawings.

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the locking device in the present invention.

[0014] Figure 2 For another angle ( Figure 1 Schematic diagram of the three-dimensional structure of the locking device (as viewed from below).

[0015] Figure 3 It is a schematic diagram of the connection relationship between the threaded component and the clamping jaw in the present invention.

[0016] Figure 4 for Figure 3 AA cross-sectional structure diagram in.

[0017] Figure 5 It is a schematic diagram of the use state of the present invention.

[0018] Explanation of symbols in the figure:

[0019] 100. Locking device;

[0020] 10. Lock body; 11. Sub-lock body; 12. Lock rod; 13. Articulation shaft; 14. Lug; 15. Articulation lug; 16. Connecting lug for connecting seat belt;

[0021] 20. Clamping mechanism; 21. Clamping claw; 210. Strip groove; 22. Orthogonal bolt; 23. First locking nut; 24. Nut; 25. Bolt head; 26. Threaded barrel; 27. Second locking nut; 29. ​​Reverse thread screw;

[0022] 30. Guide mechanism; 31. Guide member;

[0023] 40. Ladder; 41. Side bar; 42. Cross bar. DETAILED DESCRIPTION

[0024] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0025] Figure 1 , Figure 2 The safety belt ladder locking device shown in the figure comprises a locking device 100 and a safety rope connected to the locking device (omitted in the figure for clarity); the locking device comprises a lock body 10, a clamping mechanism 20 and a guide mechanism 30, the lock body comprises a pair of sub-lock bodies 11 hinged together at one end (the arc-shaped portions of the two sub-lock bodies are correspondingly arranged arcs, and one end is hinged to form a shape suitable for the cross section of the ladder side bar), and a locking rod 12 is installed at the other end (i.e., the linear portion) of the pair of sub-lock bodies; one end of the locking rod 12 is hinged to one of the sub-lock bodies and the other end is against the other sub-lock body. The lock rod is equipped with a reset spring (omitted in the figure), which applies force to the lock rod so that the lock rod has a tendency to press upward against another sub-lock body; the clamping mechanism is connected to the lock body, which can make a pair of sub-lock bodies swing around the hinge axis to open or close; the guide mechanism includes two pairs of guide members 31 that are spaced apart and each connected to one of the sub-lock bodies in the lock body, so that the lock body can move and cooperate on the side bar 41 of the ladder 40 (move along the length direction of the side bar), and the guide mechanism can cooperate with the cross bar 42 of the ladder to realize the unidirectional upward movement of the device. The length of the guide member is greater than or equal to the distance between two adjacent cross bars to ensure that there is always a cross bar between the two pairs of guide members, and the sub-lock body will not rotate around the axis of the side bar.

[0026] In actual operation (see Figure 5), the user operates the clamping mechanism 20 to open a pair of sub-lock bodies 11 around their hinge axis 13, and then close them on the side bar 41 of the ladder 40, so that the pair of sub-lock bodies cannot be separated from the side bar, but can be raised and lowered along the length direction of the side bar. The guide mechanism 30 is located on the inner side of the side bar 41. The guide mechanism clamps the cross bar 42 of the ladder but can move relative to the cross bar (unidirectional movement along the length direction of the side bar). One end of the safety belt is connected to the user, and the other end is connected to the connecting ear 16 of the lock body 10; the user wears the safety belt and goes up the ladder 40, driving the lock body to rise along the side bar 41. When the lock rod 12 encounters the cross bar 42, the cross bar hits the lock rod, causing the lock rod (overcoming the action of the reset spring) to swing downward around the hinge axis with the sub-lock body 11; and after the lock rod 12 passes the cross bar 42, the lock rod is reset under the action of the reset spring. If the user falls on the ladder, since the locking rod is pressed against a sub-lock body 11 (the locking rod can only swing downward and cannot swing upward over the sub-lock body), the locking rod 12 can be pressed against the corresponding cross bar 42, so that the locking device no longer descends along the side bar 41, thereby preventing the user from falling further.

[0027] As a preference, Figure 2 A pair of lugs 14 are provided at the bottom (bottom end of the linear part) of one of the sub-lock bodies 11, one end of the locking rod 12 is hinged on the pair of lugs, and the other end is pressed against the bottom of the other sub-lock body; the reset spring is a torsion spring, which is installed on the hinge axis between the locking rod and the lug, and applies force to the locking rod to give it the potential energy to swing upward.

[0028] like Figure 2 As shown: the clamping mechanism 20 includes a pair of clamping jaws 21, which are hinged to the outer side walls of a pair of sub-lock bodies 11 in a one-to-one manner; the tail ends of the pair of clamping jaws are connected by a threaded assembly, which can open or close the tail ends of the pair of clamping jaws, and the front ends of the pair of clamping jaws can clamp the pair of sub-lock bodies. A hinged ear 15 is provided on the outer side wall of each sub-lock body 11, and a hinge hole is opened in the middle of the clamping jaw 21 and is hinged to the hinged ear through a hinge pin, so that the front end of the clamping jaw can act on the front end of the sub-lock body 11 to close the pair of sub-lock bodies.

[0029] In the threaded assembly, both ends of the threaded barrel 26 are respectively made with positive and negative internal threads, and the positive bolt 22 with a bolt head 25 is tightened and fixed in the strip groove 210 of one of the clamping jaws by a nut 24, and can be locked with a first locking nut 23; the reverse thread screw 29 is inserted into the strip groove of one clamping jaw and both sides are tightened and fixed with nuts 24 (also locked with another first locking nut 23); one end of the positive thread bolt and one end of the reverse thread screw are also matched with the positive and negative internal threads at both ends of the threaded barrel at the same time, as long as the threaded barrel is rotated, the two clamping jaws can be driven to approach each other or move away in the opposite direction, so that a pair of split lock bodies can be driven to close or separate by the clamping jaws; after the adjustment of the threaded barrel is completed, it can be locked by the second locking nut 27, so as to ensure that the distance between the two clamping jaws remains unchanged by maintaining the relative position of the threaded barrel and the reverse thread screw (another second locking nut can also be added to lock the relative position of the threaded barrel and the positive thread bolt).

[0030] Each sub-lock body 11 includes an arcuate portion and a linear portion; the guide mechanism 30 includes two pairs of guide members 31 arranged in parallel, and the two pairs of guide members are installed on the linear portions of a pair of sub-lock bodies in a one-to-one manner. Among them, the arcuate portions of a pair of sub-lock bodies are folded on the side bars 41 of the ladder, and the linear portions of a pair of sub-lock bodies and the two pairs of guide members 31 (the two pairs of guide members are respectively installed on the linear portions through the fixing parts) are folded on both sides of the ladder crossbar. Figure 3 It can be seen that: the linear portion of one of the sub-locking bodies and a pair of guide members 31 installed on the linear portion are located on the outside of the ladder crossbar, and the linear portion of the other sub-locking body and a pair of guide members 31 installed on the linear portion are located on the inside of the ladder crossbar; the spacing between the guide members on the two sub-locking bodies is greater than the diameter of the crossbar (obviously, a spacing should also be maintained between the two sub-locking bodies to avoid interference with the crossbar when in use).

[0031] As an improvement, each guide member includes a fixed part fixedly connected to the linear part of the sub-lock body 11, and a movable part cooperating with the fixed part and capable of lifting and lowering relative to the fixed part (the fixed part is provided with a through hole, the movable part can be inserted into the through hole for sliding adjustment, and a locking screw is further provided to laterally lock the movable part on the fixed part), that is, the total length of the guide member can be adjusted or replaced to adapt to the distance between the two crossbars of different ladders. As an option, the movable part of the guide member is U-shaped.

[0032] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field,

[0033] The concept of the invention may be subject to change in specific implementation methods and application scope, and the content of this specification should not be understood as limiting the invention.

Claims

1. A safety belt ladder locking device, characterized in that: The device comprises a locking device (100) and a safety rope connected to the locking device, wherein the locking device comprises a lock body (10), a clamping mechanism (20) and a guiding mechanism (30); the lock body comprises a pair of sub-lock bodies (11) hinged together at one end and a locking rod (12) installed at the other end; one end of the locking rod is hinged to one of the sub-lock bodies and the other end is abutted against the other sub-lock body, and the locking rod is equipped with a reset spring; the clamping mechanism is connected to the lock body and can open or close the pair of sub-lock bodies; the guiding mechanism is connected to the lock body and can cooperate with the horizontal rod (42) of the ladder to prevent the lock body from falling while the lock body moves upward along the side rod (41) of the ladder (40); The clamping mechanism (20) comprises a pair of clamping jaws (21) which are hinged on the outer side walls of a pair of sub-lock bodies (11) in a one-to-one manner; the tail ends of the pair of clamping jaws are connected by a threaded assembly, and the threaded assembly can open or close the tail ends of the pair of clamping jaws so that the front ends of the pair of clamping jaws can clamp the pair of sub-lock bodies and keep a distance between the pair of sub-lock bodies to allow the crossbar to pass; The threaded assembly comprises a threaded barrel (26) with forward and reverse threads, a forward bolt (22) and a reverse screw (29) respectively fixed to the rear ends of the two clamping jaws and threadedly matched with the two ends of the threaded barrel, and a plurality of locking nuts for locking the forward bolt, the reverse screw and the threaded barrel; Each sub-lock body (11) comprises an arcuate portion and a linear portion, and the guide mechanism (30) comprises a pair of guide members (31) arranged in parallel, the pair of guide members being mounted on the linear portions of the pair of sub-lock bodies in a one-to-one manner; Each guide member (31) comprises a fixed part fixedly connected to the linear part of the sub-lock body (11), and a movable part cooperating with the fixed part and capable of rising and falling relative to the fixed part.

2. The safety belt ladder locking device according to claim 1, characterized in that: In the pair of sub-locking bodies, the two arc-shaped parts are arranged in a corresponding arc shape, and one end is hinged to each other to form a shape suitable for the cross section of the ladder side rod.

3. The safety belt ladder locking device according to claim 2, characterized in that: The locking rod is mounted at the lower end of the arc-shaped portion.

Images