Power-off anti-fall device

Abstract

The present invention provides a power-off anti-falling device, comprising a rotating member and a fixed member, wherein the rotating member is rotatably arranged on the fixed member via a first rotating shaft, at least one hook is rotatably arranged on the rotating member, and a limit rod and a touch switch are arranged on the fixed member, wherein the limit rod is movably arranged on the fixed member via an elastic member, and elastic force is applied by the elastic member to achieve contact of the limit rod with the touch switch; the rotating member rotates to generate centrifugal force to achieve hooking of the limit rod, thereby separating the limit rod from the touch switch and achieving the limit of the rotating member. The power-off anti-falling device of the present invention can achieve the anti-falling and power-off functions at the same time. The centrifugal force generated by the rotation of the rotating member is used to throw the hook out so that the hook hooks the limit rod, and the centrifugal force is cleverly used to achieve limit and power-off; at the same time, it can prevent the rotating member from rotating too fast, thus playing a speed limiting role.

Description

Technical Field

[0001] The invention relates to the technical field of protection devices, and in particular to a power-off anti-falling device. Background Art

[0002] Construction elevators are also called construction elevators for buildings, and can also be called outdoor elevators or construction site hoist cages. Construction elevators are manned and cargo-carrying construction machinery that is often used in construction. They are mainly used for the interior and exterior decoration of high-rise buildings, the construction of bridges, chimneys and other buildings. Due to its unique box structure, construction workers can ride comfortably and safely. Construction elevators are usually used in conjunction with tower cranes on construction sites.

[0003] However, due to the gap between its product safety performance and that of manned elevators, the poor working environment at the construction site, inadequate safety supervision, derailment of the construction elevator basket, broken standard sections of the construction elevator, and looseness between standard sections, the construction elevator basket often falls, so it is necessary to install corresponding anti-fall devices to protect the safety of personnel.

[0004] In summary, there is an urgent need for a power-off anti-falling device to solve the problems existing in the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a power-off anti-falling device, and the specific technical scheme is as follows:

[0006] A power-off anti-falling device comprises a rotating part and a fixed part, wherein the rotating part is rotatably arranged on the fixed part via a first rotating shaft, at least one hook is rotatably provided on the rotating part, and a limit rod and a touch switch are provided on the fixed part, wherein the limit rod is movably arranged on the fixed part via an elastic part, and an elastic force is applied by the elastic part to realize that the limit rod contacts the touch switch; the rotating part rotates to generate centrifugal force to realize that the hook hooks the limit rod, thereby realizing separation of the limit rod from the touch switch and realizing the limiting of the rotating part.

[0007] Preferably in the above technical scheme, the fixing member includes two fixing plates arranged opposite to each other, both fixing plates are provided with mounting grooves, the elastic member is arranged in the mounting groove, the two ends of the limit rod are respectively connected to the movable ends of the two elastic members, and the movement of the limit rod in the mounting groove is realized by the extension and retraction of the elastic member; the length direction of the mounting groove points to the axis center of the fixing plate, and the elastic member extends and retracts along the length direction of the mounting groove.

[0008] Preferably in the above technical solution, the two relatively arranged fixed plates are connected via at least two supporting members; and the touch switch is arranged on one of the fixed plates.

[0009] Preferably in the above technical solution, the rotating member is arranged between two fixed disks; the rotating member includes two rotating disks arranged opposite to each other, the two rotating disks are connected by a hook shaft group, and the hook is rotatably arranged on the hook shaft group.

[0010] Preferably in the above technical solution, the hook shaft group includes a hook shaft, and two rotating disks arranged opposite to each other are connected via the hook shaft, and the hook is rotatably arranged on the hook shaft and located between the two rotating disks.

[0011] Preferably in the above technical solution, the hook shaft assembly further includes two retaining rings, both of which are sleeved on the hook shaft and are respectively arranged between the hook and the adjacent rotating disk.

[0012] Preferably in the above technical solution, the hook shaft group and the hook are arranged in one-to-one correspondence, and the number of the hooks is at least two; and the plurality of hooks are evenly distributed on the rotating member.

[0013] Preferably in the above technical solution, the shape of the hook is an inverted T-shaped structure.

[0014] Preferably, the above technical solution further includes a labor-saving device, the labor-saving device includes a first wire drum and a second wire drum fixedly arranged on the second rotating shaft, both ends of the second rotating shaft are arranged on the bearing seat through bearings, and a second gear is arranged at the end of the second rotating shaft;

[0015] A first gear is disposed at the end of the first rotating shaft, and the first gear is engaged with the second gear in the labor-saving device to realize the labor-saving device through the cooperation of the limiting rod and the hook to limit the position.

[0016] Preferably in the above technical solution, safety ropes are wound around both the first wire drum and the second wire drum, and the winding direction of the safety rope on the first wire drum is opposite to that of the safety rope on the second wire drum; the safety ropes on the first wire drum and the second wire drum are respectively connected to the counterweight and the external equipment, thereby preventing the external equipment from falling and cutting off the power.

[0017] The application of the technical solution of the present invention has the following beneficial effects:

[0018] (1) The power-off anti-falling device of the present invention comprises a rotating member and a fixed member, wherein the rotating member is rotatably arranged on the fixed member via a first rotating shaft, wherein at least one hook is rotatably provided on the rotating member, and a limit rod is movably provided on the fixed member via an elastic member, and the rotating member rotates to generate centrifugal force to enable the hook to hook the limit rod, thereby achieving the limit of the rotating member; by separating the limit rod from the touch switch, the touch switch can cut off the power supply of the external device, that is, the power-off anti-falling device of the present invention can simultaneously achieve the anti-falling and power-off functions. The present invention utilizes the centrifugal force generated by the rotation of the rotating member to throw the hook out to enable the hook to hook the limit rod, and cleverly utilizes the centrifugal force to achieve the limit and power-off. The structure is simple and reliable, and only requires the rotation rate of the rotating member to meet the corresponding centrifugal force value; at the same time, it can prevent the rotating member from rotating too fast, thereby playing a speed limiting role.

[0019] (2) The hook of the power-off anti-fall device of the present invention is in the shape of an inverted T-shaped structure. That is, the hook can hook the limit rod regardless of whether the rotating part is rotating forward or reverse. In addition, the hook of the T-shaped structure has a small bending angle, which is convenient for detaching from the limit rod. After the hook hooks the limit rod, the hook can be detached from the limit rod by rotating the rotating part in the opposite direction of the hooking direction.

[0020] (3) A mounting groove is provided on the fixing plate of the power-off anti-falling device of the present invention, and an elastic member is arranged in the mounting groove. The limit rod is moved in the mounting groove by the extension and retraction of the elastic member. The power supply can be cut off when the hook hooks the limit rod through the elastic member. When the hook is separated from the limit rod, the limit rod can be reset by the spring, that is, the limit rod is restored to the state of touching the touch switch, that is, the power supply is reconnected.

[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the power-off anti-falling device (excluding the labor-saving device) of the present invention;

[0024] Figure 2 It is a cross-sectional view of the power-off anti-falling device (excluding the labor-saving device) of the present invention;

[0025] Figure 3 yes Figure 1 A schematic diagram of the structure of the middle hook and the hook shaft assembly;

[0026] Figure 4This is a schematic diagram of the state where the touch switch and the limit rod are separated;

[0027] Figure 5 It is a schematic diagram of the contact state between the touch switch and the limit rod;

[0028] Figure 6 It is a schematic structural diagram of the power-off anti-falling device of the present invention;

[0029] Figure 7 It is a schematic diagram of the power-off anti-falling device of the present invention applied to a construction elevator;

[0030] Among them, 1. fixed part, 2. rotating part, 3. hook, 4. limit rod, 5. touch switch, 6. elastic part, 7. first gear, 8. first rotating shaft, 9. supporting part, 10. hook shaft group, 10.1. hook shaft, 10.2. retaining ring, 11. second gear, 12. first wire drum, 13. second wire drum, 14. bearing seat, 15. second rotating shaft, 16. base, 17. counterweight, 18. power-off anti-fall device, 19. construction elevator, 19.1. hanging basket. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims. Embodiment 1:

[0032] See also Figure 1-6 A power-off anti-falling device comprises a rotating member 2 and a fixed member 1, wherein the rotating member 2 is rotatably arranged on the fixed member 1 via a first rotating shaft 8, at least one hook 3 is rotatably arranged on the rotating member 2, a limit rod 4 and a touch switch 5 are arranged on the fixed member 1, the limit rod 4 is movably arranged on the fixed member 1 via an elastic member 6, and an elastic force is applied by the elastic member 6 to enable the limit rod 4 to contact the touch switch 5; the rotating member 2 rotates to generate centrifugal force to enable the hook 3 to hook the limit rod 4, thereby achieving separation of the limit rod 4 from the touch switch 5 and achieving the limiting of the rotating member 2.

[0033] The fixing member 1 includes two fixing plates arranged opposite to each other, both fixing plates are provided with mounting grooves, the elastic member 6 is arranged in the mounting grooves, the two ends of the limiting rod 4 are respectively connected to the movable ends of the two elastic members 6, and the limiting rod 4 is moved in the mounting groove by the extension and retraction of the elastic member 6.

[0034] See also Figure 1 The length direction of the installation slot points to the axis of the fixed disk, and the elastic member expands and contracts along the length direction of the installation slot. The elastic member is a spring, the fixed end of the spring is connected to the bottom of the installation slot, and the movable end of the spring is connected to the limit rod.

[0035] The two oppositely disposed fixed plates are connected via at least two supporting members 9; the touch switch 5 is disposed on one of the fixed plates.

[0036] Preferably, the rotating member, the fixed member and the first rotating shaft are coaxially arranged, and the first rotating shaft 8 can be arranged on the fixed plate by means of a bearing, so that the first rotating shaft can be rotatably arranged on the fixed member.

[0037] The support member includes a fastening bolt, a nut and a sleeve. The sleeve is arranged between two fixed plates. The fastening bolt passes through the sleeve. The two fixed plates are fastened by the fastening bolt and the nut. The sleeve is used to fix the distance between the two fixed plates.

[0038] The rotating member 2 is arranged between two fixed disks; the rotating member 2 includes two rotating disks arranged opposite to each other, and the two rotating disks are connected by a hook shaft group 10, and the hook 3 is rotatably arranged on the hook shaft group 10.

[0039] The hook shaft assembly 10 comprises a hook shaft 10.1, two rotating disks arranged opposite to each other are connected via the hook shaft 10.1, and the hook 3 is rotatably arranged on the hook shaft 10.1 and is located between the two rotating disks.

[0040] The hook shaft assembly 10 further includes two retaining rings 10.2, both of which are sleeved on the hook shaft 10.1 and are respectively arranged between the hook 3 and the adjacent rotating disk.

[0041] The hook shaft group 10 is arranged one by one with the hooks 3, and the number of the hooks 3 is at least two; multiple hooks 3 are evenly arranged on the rotating member. Figure 2 , the number of the hooks is four.

[0042] Preferably, the hook 3 is in an inverted T-shaped structure, that is, the hook can hook the limit rod regardless of whether the rotating member is rotating forward or reverse. In addition, the hook of the T-shaped structure has a small bending angle, which is convenient for detaching from the limit rod. After the hook in the anti-fall device hooks the limit rod, the hook can be detached from the limit rod by rotating the rotating member in the opposite direction of the hooking direction.

[0043] People skilled in the art can understand that after the hook hooks the limit rod, the limit rod will be subjected to a force (mainly from the gravity of the limit rod). This force is pressure for the limit rod, forcing the spring to be compressed. Therefore, the limit rod will move toward the axis of the fixed disk to separate the limit rod from the touch switch. The power supply is cut off by connecting the touch switch to an external circuit. Preferably, the touch switch can be selected as a normally open switch.

[0044] The power-off anti-falling device also includes a labor-saving device, which includes a first wire drum 12 and a second wire drum 13 fixedly arranged on a second rotating shaft 15, both ends of the second rotating shaft 15 are arranged on a bearing seat 14 through bearings, and a second gear 11 is arranged at the end of the second rotating shaft 15;

[0045] The end of the first rotating shaft 8 is provided with a first gear 7, and the first gear 7 is engaged with the second gear 11 in the labor-saving device to realize the labor-saving device through the cooperation of the limiting rod and the hook.

[0046] A safety rope is wound around both the first wire drum 12 and the second wire drum 13, and the winding direction of the safety rope on the first wire drum 12 is opposite to that of the safety rope on the second wire drum 13; the safety ropes on the first wire drum 12 and the second wire drum 13 are respectively connected to the counterweight and the external equipment, so as to prevent the external equipment from falling and cut off the power.

[0047] See also Figure 1 The fixing member 1 and the labor-saving device are both arranged on the base 16 .

[0048] See also Figure 7 In this embodiment, a schematic diagram of applying a power-off anti-fall device to a construction elevator 19 is provided. The power-off anti-fall device 18 is arranged higher than the construction elevator. The safety ropes of the first and second wire drums are respectively connected to the counterweight 17 and the hanging basket 19.1 in the construction elevator (a fixed pulley needs to be provided between the hanging basket and the power-off anti-fall device). This can prevent the hanging basket from derailing or falling due to the breaking (or loosening) of the standard section of the construction elevator, and can also limit the movement speed of the hanging basket. During the downward movement of the hanging basket, the gravity of the counterweight is a traction force, which reduces the resistance of the hanging basket; during the downward movement of the hanging basket, the gravity of the counterweight is a resistance, which prevents the hanging basket from moving too fast.

[0049] The power-off anti-falling device in this embodiment can effectively prevent the hanging basket 19.1 on the construction hoist 19 from falling or moving too fast. If the hanging basket moves too fast or falls, the centrifugal force generated by the rotating part will cause the hook to hook the limit rod, the hanging basket is restricted from moving and the power is cut off (the purpose of cutting off the power is to prevent the construction hoist from continuing to work and causing accidents), preventing it from falling.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power-off anti-fall device, characterized in that: The invention comprises a rotating member (2) and a fixed member (1), wherein the rotating member (2) is rotatably arranged on the fixed member (1) via a first rotating shaft (8), at least one hook (3) is rotatably arranged on the rotating member (2), and a limit rod (4) and a touch switch (5) are arranged on the fixed member (1), wherein the limit rod (4) is movably arranged on the fixed member (1) via an elastic member (6), and an elastic force is applied by the elastic member (6) to enable the limit rod (4) to contact the touch switch (5); the rotating member (2) rotates to generate centrifugal force to enable the hook (3) to hook the limit rod (4), thereby achieving separation of the limit rod (4) from the touch switch (5) and achieving the limit of the rotating member (2); The fixing member (1) comprises two fixing plates arranged opposite to each other, each of the two fixing plates being provided with a mounting groove, the elastic member (6) being arranged in the mounting groove, the two ends of the limiting rod (4) being respectively connected to the movable ends of the two elastic members (6), and the limiting rod (4) being able to move in the mounting groove by means of the elastic member (6) being extended and retracted; the length direction of the mounting groove points to the axis of the fixing plate, and the elastic member (6) is extended and retracted along the length direction of the mounting groove; The rotating member (2) is arranged between two fixed disks; the rotating member (2) comprises two rotating disks arranged opposite to each other, the two rotating disks are connected via a hook shaft group (10), and the hook (3) is rotatably arranged on the hook shaft group (10).

2. The power-off anti-fall device according to claim 1, characterized in that: The two fixed disks arranged opposite to each other are connected via at least two supporting members (9); the touch switch (5) is arranged on one of the fixed disks.

3. The power-off anti-fall device according to claim 1, characterized in that: The hook shaft assembly (10) comprises a hook shaft (10.1), two rotating disks arranged opposite to each other are connected via the hook shaft (10.1), and the hook (3) is rotatably arranged on the hook shaft (10.1) and is located between the two rotating disks.

4. The power-off anti-fall device according to claim 3, characterized in that: The hook shaft assembly (10) further comprises two retaining rings (10.2), the two retaining rings (10.2) being sleeved on the hook shaft (10.1) and respectively arranged between the hook (3) and an adjacent rotating disk.

5. The power-off anti-fall device according to claim 4, characterized in that: The hook shaft group (10) and the hooks (3) are arranged in a one-to-one correspondence, and the number of the hooks (3) is at least two; the plurality of hooks (3) are evenly distributed on the rotating member.

6. The power-off anti-fall device according to claim 5, characterized in that: The hook (3) is in the shape of an inverted T-shaped structure.

7. The power-off anti-falling device according to any one of claims 1 to 6, characterized in that: It also includes a labor-saving device, the labor-saving device comprising a first wire drum (12) and a second wire drum (13) fixedly arranged on a second rotating shaft (15), both ends of the second rotating shaft (15) being arranged on a bearing seat (14) via bearings, and a second gear (11) being arranged at the end of the second rotating shaft (15); A first gear (7) is provided at the end of the first rotating shaft (8), and the first gear (7) is meshed with a second gear (11) in the labor-saving device to realize the labor-saving device through the cooperation of the limiting rod and the hook to limit the position.

8. The power-off anti-fall device according to claim 7, characterized in that: A safety rope is wound around both the first wire drum (12) and the second wire drum (13), and the safety rope on the first wire drum (12) is wound in the opposite direction to the safety rope on the second wire drum (13); the safety ropes on the first wire drum (12) and the second wire drum (13) are respectively connected to the counterweight and the external device, thereby preventing the external device from falling and cutting off the power supply.

Images