Anti-falling automatic locking safety mechanism

Abstract

The invention discloses an anti-falling automatic locking safety mechanism which comprises an outer shell, and the outer shell is provided with two opposite sides and is provided with coaxial through holes. The shaft rod is rotationally connected into the two through holes; the first end of the first safety rope is connected to the shaft rod; the locking mechanism is connected with the first safety rope, and the locking mechanism locks the first safety rope after the first safety rope vertically moves in place; the strap is worn on a human body, and the second end of the first safety rope is correspondingly connected with the strap; the anti-falling safety mechanism is small in size, simple in structure and capable of achieving automatic locking, and workers are prevented from falling when climbing the ladder on the comprehensive pipe gallery.

Description

Technical Field

[0001] The present invention relates to the technical field of safety protection for utility tunnels, and particularly to an anti-falling automatic locking safety mechanism. Background Art

[0002] According to the patent publication number CN219864833U, a ladder anti-falling footrest mechanism, its technical solution is to control the footrest plate to be not far from the bottom of the foot by winch traction. Even if it falls, it can easily reach the footrest plate and quickly adjust the body position. However, in the application scenario of utility tunnels, due to the large number of ladders and narrow space in the tunnels, it is not suitable for large-volume anti-falling devices with complex structures. At the same time, the common wearable safety belts on the market have a long lock-up reaction time and a large volume, so they are not suitable for the application environment of ladders in utility tunnels either. Summary of the Invention

[0003] The purpose of the present invention is to provide a miniaturized, simple-structured, and automatically locked anti-falling automatic locking safety mechanism to avoid accidents when staff climb ladders in utility tunnels.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions, including an outer housing, the outer housing having opposite sides and respectively provided with coaxial through holes; a shaft rod rotatably connected in the two through holes; a first safety rope, the first end of the first safety rope being connected to the shaft rod; a locking mechanism connected to the first safety rope, the locking mechanism locking the first safety rope after it vertically moves in place; a harness worn on the human body, the second end of the first safety rope being correspondingly connected to the harness.

[0005] Preferably, the locking mechanism includes a locking bracket and a first locking member installed on the locking bracket for locking after the first safety rope moves in place.

[0006] Preferably, the locking bracket is provided with an installation space for installing the first locking member. The installation space has opposite first side walls and second side walls. The first side wall is horizontally provided with a movable channel. The first locking member is provided with a movable end that can reciprocate in the movable channel. The locking bracket is provided with a limiting portion opposite to the movable channel. The first safety rope vertically passes through the locking bracket and is connected to the shaft rod. The locking bracket is provided with a through hole for the first safety rope to pass through. After the first safety rope vertically moves in place, the movable end of the first locking member moves horizontally to press the rope body of the first safety rope against the limiting portion.

[0007] Preferably, the first locking member includes a locking shaft rod that can reciprocate within the movable channel and a spring with one end laterally fixed to the locking shaft rod, and the other end of the spring is fixed to the second side wall. After the first safety rope moves vertically in place, the locking shaft rod moves laterally to press the rope body of the first safety rope against the limiting portion.

[0008] Preferably, the locking mechanism further includes a first flyweight fixedly connected to the shaft rod and a second flyweight rotatably connected to the first flyweight. The first flyweight and the second flyweight are respectively provided with concave and convex surfaces facing each other. The first flyweight is provided with a mounting shaft and a limiting groove for restricting the rotation angle of the second flyweight. A torsion spring is sleeved on the mounting shaft, and both ends of the torsion spring are connected to the first flyweight and the second flyweight respectively. The second flyweight is provided with a mounting hole that is rotationally adapted to the mounting shaft. When the torsion spring is not deformed, the concave and convex surfaces are closed; the second flyweight is in transmission cooperation with the locking shaft rod. After the second flyweight rotates in place, the locking shaft rod moves laterally to press the rope body of the first safety rope against the limiting portion.

[0009] Preferably, a sliding groove is horizontally opened on the locking bracket above the locking shaft rod and the spring. A guiding groove is provided on the side wall of the sliding groove. A limiting block is vertically fixed on the locking shaft rod, and the limiting block extends outside the locking bracket. A guiding block located in the guiding groove is fixed to the side of the limiting block. When the locking shaft rod reciprocates within the movable channel, the limiting block reciprocates within the sliding groove, and the guiding block reciprocates within the guiding groove. In the initial state, the limiting block is in the sliding groove and away from the first side wall, the guiding block is in the guiding groove and away from the first side wall, the spring is in a compressed state, and the torsion spring is in an undeformed state; the second flyweight is in transmission cooperation with the limiting block. After the second flyweight rotates in place, the locking shaft rod moves laterally to press the rope body of the first safety rope against the limiting portion.

[0010] Preferably, the second flyweight is provided with a convex block, and a groove matching the convex block is opened on the limiting block. After the second flyweight rotates in place, the convex block is inserted into the groove.

[0011] Preferably, a reset mechanism is further included, and the reset mechanism is used to reset the first safety rope after it moves; the reset mechanism includes a reset outer shell and an elastic reset member connected coaxially. The elastic reset member is wound around the shaft rod, and the reset outer shell is sleeved outside the elastic reset member.

[0012] Preferably, a second safety rope is further included. The first end of the first safety rope is wound around the shaft rod, and the second end of the first safety rope is connected to the first end of the second safety rope through a buckle.

[0013] Beneficial effects: Compared with the prior art:

[0014] 1. In this technical solution, the shaft rod is driven by a rope to rotate the centrifugal flyweight to trigger the locking member, eliminating complex components such as motors, with a simple structure and low cost;

[0015] 2. The guiding hole for the safety rope is provided on this mechanism, which slows down the repeated swinging of the rope when a person falls, playing a role in stabilizing the posture of the person;

[0016] 3. A structure of synchronously locking the shaft rod and the rope is adopted. When a fall occurs, the flyweight triggers the self-locking shaft rod. At this time, the self-locking shaft rod locks the movement of the rope. At the same time, the flyweight is connected to the self-locking shaft rod and fixed on the rotating shaft, which will further reduce the movement speed of the rotating shaft rod. This locking structure will effectively improve the locking ability and reduce the impact of instantaneous impact on the durability of the device. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the embodiment of the present invention;

[0018] Figure 2 is a cross-sectional view of the reset mechanism of the embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of the locking mechanism of the embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of the centrifugal flyweight mechanism of the embodiment of the present invention;

[0021] Figure 5 is a schematic diagram when the locking mechanism of the invention example is locked.

[0022] In the figure, 1 - outer housing; 11 - through hole; 2 - shaft rod; 3 - reset mechanism; 31 - reset outer housing; 32 - elastic reset member; 4 - first safety rope; 41 - second safety rope; 5 - backpack; 6 - locking mechanism; 61 - locking bracket; 611 - installation space; 612 - sliding groove; 613 - guiding groove; 614 - moving channel; 615 - limiting part; 62 - first locking member; 621 - spring; 622 - locking shaft rod; 6221 - limiting block; 6222 - guiding block; 63 - first flyweight; 631 - installation shaft; 632 - limiting groove; 64 - second flyweight; 641 - installation hole; 642 - convex block; 65 - torsion spring. Detailed Embodiments

[0023] To enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solution in the embodiments of this application in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0024] Combined with Figure 1 , an anti-falling automatic locking safety mechanism includes a housing 1. The housing 1 has opposite sides and is respectively provided with coaxial through holes 11; a shaft rod 2 rotatably connected in the two through holes 11; a first safety rope 4, the first end of the first safety rope 4 is connected to the shaft rod 2; a locking mechanism 6, the locking mechanism 6 is connected to the first safety rope 4, and the locking mechanism 6 locks the first safety rope 4 after it moves vertically in place; a harness 5, the harness 5 is worn on the human body, and the second end of the first safety rope 4 is correspondingly connected to the harness 5.

[0025] A second safety rope 41, the first end of the second safety rope 41 is connected to the first safety rope 4 through a buckle, and the second end of the second safety rope 41 is a free end, which is used to slowly pull the free end to pull down the first safety rope 4 and connect it to the harness 5.

[0026] The above-mentioned buckle is mostly made of high-strength metal materials (such as aluminum alloy or stainless steel). The above-mentioned buckle needs to take into account the functions of quick connection and disassembly. For example, it can be opened and closed with one hand operation, and is suitable for high-altitude operation scenarios.

[0027] Combined with Figure 2 , the above-mentioned reset mechanism 3 is used to reset the first safety rope 4 after it moves. The reset mechanism 3 includes a reset housing 31 and an elastic reset member 32 connected coaxially. The elastic reset member 32 is wound around the shaft rod 2, and the reset housing 31 is sleeved outside the elastic reset member 32;

[0028] When the first safety rope 4 drives the shaft rod 2 to rotate, the elastic reset member 32 will be wound to store elastic potential energy; when the staff finishes using the above-mentioned safety mechanism, the elastic reset member 32 will release the compressed elastic potential energy, drive the shaft rod 2 to rotate, and retract the first safety rope 4.

[0029] The above-mentioned elastic resetting member 32 is a metal reed, and the material should be selected from high-elasticity metals (such as spring steel, stainless steel) to meet the requirements of high strength, fatigue resistance and corrosion resistance; the above-mentioned elastic resetting member 32 is of a spiral structure. The inner end of the elastic resetting member 32 is connected to the shaft rod 2 by bolts, and the outer end of the elastic resetting member 32 is connected to the inside of the reset housing 31 by bolts. One side of the reset housing 31 close to the housing 1 is connected to the housing 1 by bolts.

[0030] Combined with Figure 3 、 Figure 4 and Figure 5 , the above-mentioned locking mechanism 6 includes a locking bracket 61 and a first locking member 62 installed on the above-mentioned locking bracket 61 for locking after the above-mentioned first safety rope 4 moves in place.

[0031] An installation space 611 for installing the above-mentioned first locking member 62 is provided on the above-mentioned locking bracket 61. Opposite first side wall and second side wall are provided in the installation space 611. An activity channel 614 is horizontally opened on the above-mentioned first side wall. An activity end that can reciprocate in the above-mentioned activity channel 614 is provided on the above-mentioned first locking member 62. A limiting portion 615 facing the above-mentioned activity channel 614 is provided on the above-mentioned locking bracket 61. The above-mentioned first safety rope 4 vertically passes through the above-mentioned locking bracket 61 and then is connected to the above-mentioned shaft rod 2. A through hole for the above-mentioned first safety rope 4 to pass through is opened on the above-mentioned locking bracket 61. After the above-mentioned first safety rope 4 vertically moves in place, the activity end of the above-mentioned first locking member 62 moves horizontally to press the rope body of the above-mentioned first safety rope 4 against the above-mentioned limiting portion 615.

[0032] The above-mentioned locking bracket 61 and the first locking member are integrally designed, reducing redundant parts and having a simple structure. At the same time, a through hole for the first safety rope 4 is provided on this mechanism, which slows down the repeated swinging of the rope when a person falls, playing a role in stabilizing the person's posture.

[0033] The end of the above-mentioned first locking member 62 is provided with knurling, grooving or spraying a wear-resistant coating on the surface to increase the friction coefficient of the contact surface and ensure no slippage during locking; the surface of the above-mentioned limiting portion 615 also adopts knurling, grooving or spraying a wear-resistant coating.

[0034] The above-mentioned first locking member 62 includes a locking shaft rod 622 that can reciprocate in the above-mentioned activity channel 614 and a spring 621 fixed horizontally at one end to the above-mentioned locking shaft rod 622. The other end of the above-mentioned spring 621 is fixed to the above-mentioned second side wall. After the above-mentioned first safety rope 4 vertically moves in place, the above-mentioned locking shaft rod 622 moves horizontally to press the rope body of the above-mentioned first safety rope 4 against the above-mentioned limiting portion 615.

[0035] The above-mentioned locking mechanism 6 further includes a first flyweight 63 fixedly connected to the shaft rod 2 and a second flyweight 64 rotatably connected to the first flyweight 63. The first flyweight 63 and the second flyweight 64 are respectively provided with concave and convex surfaces facing each other. The first flyweight 63 is provided with a mounting shaft 631 and a limiting groove 632 for limiting the rotation angle of the second flyweight 64. A torsion spring 65 is sleeved on the mounting shaft 631. Two ends of the torsion spring 65 are respectively connected to the first flyweight 63 and the second flyweight 64. The second flyweight 64 is provided with a mounting hole 641 that is rotationally adapted to the mounting shaft 631. When the torsion spring 65 is not deformed, the concave surface and the convex surface are closed; the second flyweight 64 is in transmission cooperation with the locking shaft rod 622. After the second flyweight 64 rotates in place, the locking shaft rod 622 moves horizontally to press the rope body of the first safety rope 4 onto the limiting portion 615.

[0036] The limiting groove 632 on the first flyweight 63 for limiting the rotation angle of the second flyweight 64 has a limiting angle range of 30 - 90° for the rotation restricted by the limiting groove 632.

[0037] A sliding groove 612 is horizontally opened above the locking shaft rod 622 and the spring 621 on the locking bracket 61. A guiding groove 613 is provided on the side wall of the sliding groove 612. A limiting block 6221 is vertically fixed on the locking shaft rod 622. The limiting block 6221 extends outside the locking bracket 61. A guiding block 6222 located in the guiding groove 613 is fixed to the side of the limiting block 6221. When the locking shaft rod 622 reciprocates in the moving channel 614, the limiting block 6221 reciprocates in the sliding groove 612, and the guiding block 6222 reciprocates in the guiding groove 613. In the initial state, the limiting block 6221 is in the sliding groove 612 and away from the first side wall, the guiding block 6222 is in the guiding groove 613 and away from the first side wall, the spring 621 is in a compressed state, and the torsion spring 65 is in an undeformed state; the second flyweight 64 is in transmission cooperation with the limiting block 6221. After the second flyweight 64 rotates in place, the locking shaft rod 622 moves horizontally to press the rope body of the first safety rope 4 onto the limiting portion 615.

[0038] The second flyweight 64 is provided with a convex block 642, and a groove matching with the convex block 642 is opened on the limiting block 6221. After the second flyweight 64 rotates in place, the convex block 642 is inserted into the groove.

[0039] The structure of synchronous locking of the shaft rod 2 and the first safety rope 4 is adopted. When a fall occurs, the rotation speed of the shaft rod 2 exceeds the threshold value, the centrifugal force is greater than the preload force provided by the torsion spring 65, and the second swing block 64 is swung out. After rotating into place, the protrusion 642 on the second swing block 64 clamps the groove on the limit block 6221, and releases the guide block 6222 that clamps the locking shaft rod 622 from the groove in the guide groove 613. At the same time, the second swing block 64 continues to drive the locking shaft rod 622 to push the rope body of the first safety rope 4 to the above-mentioned limit portion 615; on the one hand, the locking shaft rod 622 locks the movement of the rope, and on the other hand, the second swing block 64 is restricted by the limit groove 632 of the first swing block 63. When the second swing block 64 is swung out and connected with the locking shaft rod 622, the rotation speed of the shaft rod 2 will be further reduced. This locking structure will effectively improve the locking ability and reduce the impact of instantaneous impact on the durability of the device.

[0040] As is well known, from material mechanics, it is known that the degree of stretching of the torsion spring 65 is related to factors such as the material properties and geometric dimensions of the torsion spring 65 itself. The elastic limit, yield strength and fatigue life of the torsion spring 65 determine the maximum degree of stretching of the torsion spring 65. In the present invention, before the human body falls to the ground, the torsion spring 65 opens, and the second swing block 64 pushes the locking shaft 622 to press against the first safety rope 4 and the limit part 615 for friction locking. Therefore, it can be understood that the gravity exerted on the human body and the time of falling to the ground after the gravity acceleration should be greater than the time taken for the second swing block 64 to push the locking shaft to press against the first safety rope 4 and the limit part 615 for friction locking. It is worth noting that the torsion spring 65 used in the present invention needs to be selected in combination with the actual range of gravity exerted on the human body. It can be considered that the general human body mass including the weight carried on the body can be understood as between 50kg and 150kg. The torsion spring 65 adopts appropriate materials according to relevant calculations, and its calculation process is not shown here.

[0041] Working principle: In order to lock the movement of the rope, it is necessary to lock the movement of the shaft rod 2 that binds the rope or separately lock the fall of the rope. This solution innovatively provides a solution for synchronously fixing the shaft rod 2 and the rope. First, the anti-fall safety mechanism is installed and fixed at the top of the ladder. The first safety rope 4 is slowly pulled down by the second safety rope 41. The staff puts on the harness 5 and fixedly connects it to the first safety rope 4. The limiting block 6221 is pulled to snap the guiding block 6222 into the groove of the guiding groove 613, so that the spring 621 is in a compressed state. When the staff climbs up from the pipe gallery ladder, if they accidentally fall due to stepping on an empty space, the shaft rod 2 is driven to rotate by the first safety rope 4. When the centrifugal force generated by the rotation of the shaft rod 2 is greater than the pre-tightening force provided by the torsion spring 65 in the centrifugal throw block 63, the second throw block 64 is thrown outwards. The convex block 642 of the second throw block 64 is engaged with the groove of the limiting block 6221 of the compression spring 621, pulling the guiding block 6222 away from the groove in the guiding groove 613. The spring 621 releases its elastic potential energy, and the locking shaft rod 622 moves along the moving channel 614. At the same time, the second throw block 64 continues to push the locking shaft rod 622 to press against the first safety rope 4 for frictional locking with the limiting part 615.

[0042] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. An anti-falling automatic locking safety mechanism, characterized in that, Comprising: An outer housing, the outer housing having opposite sides and respectively provided with coaxial through holes; A shaft rod, rotatably connected within the two through holes; A first safety rope, a first end of the first safety rope being connected to the shaft rod; A locking mechanism, the locking mechanism being connected to the first safety rope, and the locking mechanism locking the first safety rope after it vertically moves into place; A harness, the harness being worn on a human body, and a second end of the first safety rope being correspondingly connected to the harness.

2. The anti-falling automatic locking safety mechanism according to claim 1, characterized in that, The locking mechanism includes a locking bracket and a first locking member mounted on the locking bracket for locking after the first safety rope moves into place.

3. The anti-falling automatic locking safety mechanism according to claim 2, wherein The locking bracket is provided with an installation space for installing the first locking member. The installation space has opposite first side walls and second side walls. A movable channel is horizontally opened on the first side wall. The first locking member is provided with a movable end that can reciprocate within the movable channel. The locking bracket is provided with a limiting portion facing the movable channel. The first safety rope vertically passes through the locking bracket and is connected to the shaft rod. The locking bracket is provided with a through hole for the first safety rope to pass through. After the first safety rope vertically moves into place, the movable end of the first locking member moves horizontally to press the rope body of the first safety rope against the limiting portion.

4. The anti-falling automatic locking safety mechanism according to claim 3, characterized in that, The first locking member includes a locking shaft rod that can reciprocate within the movable channel and a spring with one end horizontally fixed to the locking shaft rod. The other end of the spring is fixed to the second side wall. After the first safety rope vertically moves into place, the locking shaft rod moves horizontally to press the rope body of the first safety rope against the limiting portion.

5. The anti-falling automatic locking safety mechanism according to claim 4, characterized in that The locking mechanism further includes a first throwing block fixedly connected to the shaft rod and a second throwing block rotatably connected to the first throwing block. The first throwing block and the second throwing block are respectively provided with concave and convex surfaces facing each other. The first throwing block is provided with a mounting shaft and a limiting groove for limiting the rotation angle of the second throwing block. A torsion spring is sleeved on the mounting shaft. Two ends of the torsion spring are respectively connected to the first throwing block and the second throwing block. The second throwing block is provided with a mounting hole rotatably adapted to the mounting shaft. When the torsion spring is not deformed, the concave and convex surfaces are closed; the second throwing block is in transmission cooperation with the locking shaft rod. After the second throwing block rotates into place, the locking shaft rod moves horizontally to press the rope body of the first safety rope against the limiting portion.

6. The anti-falling automatic locking safety mechanism according to claim 5, characterized in that, A sliding groove is transversely formed in the locking bracket above the locking shaft rod and the spring. A guiding groove is provided on the side wall of the sliding groove. A limiting block is vertically fixed on the locking shaft rod. The limiting block extends outside the locking bracket. A guiding block located in the guiding groove is fixed on the side of the limiting block. When the locking shaft rod reciprocates in the moving channel, the limiting block reciprocates in the sliding groove, and the guiding block reciprocates in the guiding groove. In the initial state, the limiting block is in the sliding groove and away from the first side wall, the guiding block is in the guiding groove and away from the first side wall, the spring is in a compressed state, and the torsion spring is in an undeformed state; the second throwing block is in transmission cooperation with the limiting block. After the second throwing block rotates in place, the locking shaft rod moves horizontally to push the rope body of the first safety rope onto the limiting part.

7. The anti-falling automatic locking safety mechanism according to claim 6, characterized in that, The second throwing block is provided with a convex block, and a groove matching with the convex block is formed on the limiting block. After the second throwing block rotates in place, the convex block is inserted into the groove.

8. The anti-falling automatic locking safety mechanism according to claim 1, characterized in that, A reset mechanism is further included. The reset mechanism is used for resetting the first safety rope after it moves; the reset mechanism includes a reset outer shell and an elastic reset member connected coaxially. The elastic reset member is wound around the shaft rod, and the reset outer shell is sleeved outside the elastic reset member.

9. The anti-falling automatic locking safety mechanism according to claim 1, characterized in that, A second safety rope is further included. The first end of the first safety rope is wound around the shaft rod, and the second end of the first safety rope is connected to the first end of the second safety rope through a buckle.

Images