Novel pulley falling stopper

Abstract

The utility model provides a novel pulley falling stopper, and belongs to the technical field of falling stoppers. The falling stopper solves the problems that when an existing falling stopper in the market is unlocked and slides, due to the weight of a human body, if a worker controls the falling stopper improperly, the falling stopper possibly slides quickly, and the sudden falling phenomenon occurs. The novel pulley falling stopper comprises a friction chain and a shell hinged to the friction chain, a first positioning pin is arranged on the shell, the friction chain is connected with the shell through the first positioning pin, a bearing is fixedly arranged on the surface of the first positioning pin, a pulley is fixedly arranged on the surface of the outer ring of the bearing and located in the shell, and a guide protruding block is fixedly arranged in the shell. The falling stopper has the advantages that the falling speed of the falling stopper is slowed down, a worker can better control the falling speed, the control force of the worker is saved, and the safety of high-altitude action is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of fall arresters and relates to a fall arrester, in particular to a novel pulley fall arrester. Background Art

[0002] A fall arrester, also known as a fall protector, has the main function of protecting workers from falling injuries and is a vital personal protective equipment in aerial work.

[0003] Most existing fall arresters use a friction chain sleeve mounted on a rope, and the locking and sliding of the fall arrester are controlled by controlling the extension and contraction state of the friction chain. However, when the fall arrester is unlocked and slid, due to the weight of the human body, if the worker does not control it properly, the fall arrester may slide rapidly and drop suddenly, which can easily put the worker in danger. Therefore, it is of great significance to design a new pulley fall arrester. Summary of the Invention

[0004] The purpose of the utility model is to provide a novel pulley fall arrester in view of the above-mentioned problems existing in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a new type of pulley fall arrester, characterized in that it includes a friction chain and a shell hinged to the friction chain, a positioning pin 1 is provided on the shell, and the friction chain is connected to the shell through the positioning pin 1, a bearing is fixedly provided on the surface of the positioning pin 1, a pulley is fixedly provided on the surface of the outer ring of the bearing, and the pulley is located inside the shell, a guide protrusion is fixedly provided inside the shell, a positioning pin 2 for fixing the guide protrusion is provided on the shell, a groove 1 is provided on the guide protrusion, and a locking unit is provided at one end of the friction chain.

[0006] In the above-mentioned novel pulley fall arrester, the locking unit includes a plate hinged to the friction chain, two shafts are provided on the plate, and the plate is connected to the friction chain via one shaft.

[0007] In the above-mentioned new type of pulley fall arrester, a pressure relief plate is provided on the surface of the shaft, a torsion spring is provided between the pressure relief plate and the shaft, positioning blocks are provided between the two sides of the pressure relief plate and the plate, and the positioning blocks are sleeved on the shaft.

[0008] In the above-mentioned novel pulley fall arrester, a connecting slot hole is provided on the shell, and a second groove is provided on the friction chain.

[0009] Compared with the existing technology, this new pulley fall arrester changes the rope movement path by setting a guide protrusion, while also increasing the friction between the rope and the fall arrester, which can slow down the descent speed of the fall arrester, allowing workers to better control the descent speed, saving workers' control effort, and making high-altitude operations safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional schematic diagram of the novel pulley fall arrester.

[0011] Figure 2 It is a schematic diagram of the internal structure of the shell of the novel pulley fall arrester.

[0012] Figure 3 It is a structural diagram of the guide protrusion of the novel pulley fall arrester.

[0013] Figure 4 It is a structural diagram of the torsion spring of the novel pulley fall arrester.

[0014] Figure 5 It is a structural schematic diagram of groove 2 of the novel pulley fall arrester.

[0015] In the figure, 1. friction chain; 2. housing; 3. locating pin 1; 4. bearing; 5. pulley; 6. guide protrusion; 7. locating pin 2; 8. groove 1; 9. locking unit; 10. plate; 11. shaft; 12. pressure release plate; 13. pressure release plate; 14. locating block; 15. connecting slot; 16. groove 2. DETAILED DESCRIPTION

[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0017] like Figure 1 、 2As shown in Figures 3, 4 and 5, the new pulley fall arrester comprises a friction chain 1 and a shell 2 hinged to the friction chain 1. A positioning pin 3 is provided on the shell 2, and the friction chain 1 is connected to the shell 2 through the positioning pin 3. A bearing 4 is fixedly provided on the surface of the positioning pin 3, a pulley 5 is fixedly provided on the outer surface of the bearing 4, and the pulley 5 is located inside the shell 2. A guide protrusion 6 is fixedly provided inside the shell 2, a positioning pin 7 for fixing the guide protrusion 6 is provided on the shell 2, a groove 8 is provided on the guide protrusion 6, and a locking unit 9 is provided at one end of the friction chain 1. By providing a locking unit with a The guide protrusion 6 of the groove 8 allows the rope to pass through the friction chain 1 and the shell 2. When the rope passes through the shell 2, the pulley 5 and the guide protrusion 6 are used in conjunction to change the movement path of the rope, so that the rope slides in an "S"-shaped path in the shell 2. The groove 8 can better fit the rope and increase the friction area with the rope. While changing the movement path of the rope, the guide protrusion 6 also increases the friction between the rope and the rope. When the fall arrester is unlocked and slid, the descent speed of the fall arrester can be slowed down, so that the worker can better control the descent speed, saving the worker's control effort and making high-altitude work safer.

[0018] Preferably, the locking unit 9 includes a plate 10 hinged to the friction chain 1 , two shafts 11 are provided on the plate 10 , and the plate 10 is connected to the friction chain 1 via one shaft 11 .

[0019] Preferably, a pressure relief plate 12 is provided on the surface of the shaft 11, a torsion spring 13 is provided between the pressure relief plate 12 and the shaft 11, and positioning blocks 14 are provided between the two sides of the pressure relief plate 12 and the plate 10, and the positioning blocks 14 are sleeved on the shaft 11, and the rope passes through the pressure relief plate 12 and the friction chain 1. When the friction chain 1 is in an extended state, the two pressure relief plates 12 squeeze the rope in opposite directions under the action of the torsion spring 13, forming a state of locking the rope, thereby enabling the fall arrester to be locked on the rope. When it needs to be moved, by pressing the pressure relief plate 12, the friction chain 1 tends to be contracted, and the fall arrester can be controlled to slide.

[0020] Preferably, a connecting slot 15 is provided on the shell 2, and the connecting slot 15 is used to connect to the safety buckle on the worker. A groove 2 16 is provided on the friction chain 1, and the groove 2 16 can better fit the rope, increase the contact area, and increase the friction between the rope.

[0021] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0022] Although this document frequently uses terms such as friction chain 1, housing 2, positioning pin 1 3, bearing 4, pulley 5, guide protrusion 6, positioning pin 2 7, groove 1 8, locking unit 9, plate 10, shaft 11, pressure release plate 12, torsion spring 13, positioning block 14, connecting slot 15, and groove 2 16, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations would be contrary to the spirit of the present invention.

Claims

1. A new type of pulley fall arrester, characterized in that: The invention comprises a friction chain (1) and a housing (2) hinged to the friction chain (1), wherein a positioning pin (3) is provided on the housing (2), and the friction chain (1) is connected to the housing (2) through the positioning pin (3), a bearing (4) is fixedly provided on the surface of the positioning pin (3), a pulley (5) is fixedly provided on the outer ring surface of the bearing (4), and the pulley (5) is located inside the housing (2), a guide protrusion (6) is fixedly provided inside the housing (2), a positioning pin (7) for fixing the guide protrusion (6) is provided on the housing (2), a groove (8) is provided on the guide protrusion (6), and a locking unit (9) is provided at one end of the friction chain (1).

2. A new type of pulley fall arrester according to claim 1, characterized in that: The locking unit (9) comprises a plate (10) hinged to the friction chain (1), two shafts (11) are provided on the plate (10), and the plate (10) is connected to the friction chain (1) via one shaft (11).

3. A new type of pulley fall arrester according to claim 2, characterized in that: A pressure relief plate (12) is provided on the surface of the shaft (11), a torsion spring (13) is provided between the pressure relief plate (12) and the shaft (11), and positioning blocks (14) are provided between both sides of the pressure relief plate (12) and the plate (10), and the positioning blocks (14) are sleeved on the shaft (11).

4. A new type of pulley fall arrester according to claim 1, characterized in that: The housing (2) is provided with a connecting slot (15), and the friction chain (1) is provided with a second groove (16).

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