Emergency anti-falling safety device for building construction elevator

Abstract

An emergency anti-falling safety device for a building construction elevator comprises a toothed rail for walking of the construction elevator, the rear end of the toothed rail is slidably connected with rollers, a protective shell is arranged at the front end of the toothed rail and connected with the construction elevator, the toothed rail is meshed with a speed measuring gear, the speed measuring gear is connected with a rotating speed sensor, and the rear end of the protective shell is slidably connected with a first brake mechanism. A second brake mechanism is arranged on the top of the protective shell. When the descending speed of the elevator is slightly overspeed, the hook head makes contact with the tooth hook, the elevator is braked, the speed of the elevator is slowed down after braking, the positioning rod is pulled back, speed limiting is automatically relieved, if the speed of the elevator does not return to the normal speed at the moment, the elevator is braked by the second braking mechanism again, and accidental stall of the construction elevator is prevented. The elevator can be stopped to the bottommost layer to be overhauled, so that people are prevented from being trapped at the high altitude due to small faults; when the impact force of the elevator is too large to cause breakage of the positioning rod, the first brake mechanism automatically brakes, and the construction elevator is prevented from falling suddenly.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator safety, and more specifically, particularly to an emergency anti-falling safety device for a construction elevator. Background Art

[0002] Construction elevators are used for vertical transportation at construction sites. To prevent the elevator from losing control and falling during use, anti-fall devices are installed in construction elevators to ensure the safety of the elevator driver and workers in the elevator.

[0003] Existing construction elevators directly apply full brakes to prevent falling. Sometimes a minor fault in the elevator's motor causes sudden acceleration, which triggers the anti-fall device and causes the elevator to hover in mid-air. The elevator can continue to be used at this time, but it causes a large number of people to be trapped in mid-air and require rescue. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings, the utility model aims to provide an emergency anti-falling safety device for a construction elevator, which can intermittently decelerate when the elevator accelerates occasionally, and fully brake when the elevator is actually falling.

[0005] An emergency anti-fall safety device for a construction elevator comprises: a rack rail for the construction elevator to travel, a roller being slidably connected to the rear end of the rack rail, a protective shell being provided at the front end of the rack rail, a speed measuring gear being meshed on the rack rail, a speed measuring gear being connected to a rotation speed sensor, a first braking mechanism being slidably connected to the rear end of the protective shell, and a second braking mechanism being provided at the top of the protective shell.

[0006] Furthermore, the protective shell is a rectangular shell, and the protective shell is provided with an opening in the direction of the rack.

[0007] Furthermore, the roller and the protective shell are respectively arranged on the front and rear sides of the rack.

[0008] Furthermore, a connecting shaft is provided on the side wall of the speed measuring gear, the connecting shaft is rotatably connected to the protective shell, a side wall of the connecting shaft passes through the protective shell, one end of the connecting shaft is fixedly connected to a transmission gear, and the transmission gear is meshed with the speed sensor.

[0009] Furthermore, the first braking mechanism comprises a braking rack, a connecting plate and a telescopic rod, one end of the connecting plate is connected to the telescopic rod, and the braking rack is fixed to the other end of the connecting plate.

[0010] Furthermore, there are two brake racks, which are arranged at both sides of the speed measuring gear and at the front end of the rack. The brake rack can fit with the rack.

[0011] Furthermore, the telescopic rods are provided in two groups, and the telescopic rods are respectively fixed to the top and bottom of the protective shell. The connecting plates are also provided in two groups, and the connecting plates are respectively fixed to the upper and lower parts of the braking rack.

[0012] Furthermore, the second braking mechanism includes a driven gear, a limiting ring and a positioning rod, the driven gear is meshed with the rack, the positioning rod is rotatably connected to one side of the driven gear, the limiting ring is arranged on the outside of the driven gear, and the positioning rod can be clamped on the limiting ring.

[0013] Furthermore, a protrusion is provided on the side wall of the driven gear, two positioning rods are provided, a hook is provided at the front end of the positioning rod, and a spring is connected between the positioning rod and the protrusion.

[0014] Furthermore, a support column is provided at the bottom of the limiting ring, the support column is fixedly connected to the protective shell, and a plurality of hook teeth are provided in a circular array on the inner wall of the limiting ring.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] ① When the elevator starts to descend and slightly exceeds the speed limit, the hook head contacts the tooth hook to brake the elevator. After braking, the elevator slows down, the positioning rod is pulled back, and the speed limit is automatically released. If the elevator does not return to normal speed at this time, it will be braked by the second brake mechanism again. After multiple sudden stops, the elevator driver can manually start the first brake mechanism for braking, which prevents the occasional stall of the construction elevator. The elevator can be stopped at the bottom floor for maintenance, avoiding people being trapped at high altitudes due to minor faults; when the impact force of the elevator is too large and the positioning rod breaks, the descent rate of the construction elevator exceeds the monitoring threshold of the speed sensor, and the first brake mechanism automatically brakes to prevent the construction elevator from falling sharply. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 The present invention is a schematic diagram of the overall structure of an emergency anti-fall safety device for a construction elevator.

[0019] Figure 2 The present invention is a schematic diagram of a first braking mechanism in an emergency anti-fall safety device for a construction elevator.

[0020] Figure 3 The present invention is a schematic diagram of a second braking mechanism in an emergency anti-fall safety device for a construction elevator.

[0021] In the figure: 1. rack; 2. roller; 3. protective shell; 4. speed measuring gear; 41. transmission gear; 5. first braking mechanism; 51. braking rack; 52. connecting plate; 53. telescopic rod; 6. second braking mechanism; 61. driven gear; 611. protrusion; 612. spring; 62. limiting ring; 621. supporting column; 622. hook tooth; 63. positioning rod; 631. hook head; 7. speed sensor; 8. controller. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1 As shown, an emergency anti-fall safety device for a construction elevator comprises: a rack rail 1 for the construction elevator to travel, a roller 2 is slidably connected to the rear end of the rack rail 1, a protective shell 3 is provided at the front end of the rack rail 1, the protective shell 3 is connected to the construction elevator, a speed measuring gear 4 is meshed on the rack rail 1, the speed measuring gear 4 is connected to a speed sensor 7, a first braking mechanism 5 is slidably connected to the rear end of the protective shell 3, and a second braking mechanism 6 is provided on the top of the protective shell 3.

[0024] The protective shell 3 is a rectangular shell with an opening facing the rack rail 1 . The protective shell 3 is connected to the construction elevator. The construction elevator and the protective shell 3 move simultaneously. When the protective shell 3 stops moving, the construction elevator also stops moving and reaches a braking state.

[0025] The roller 2 and the protective shell 3 are respectively arranged on the front and rear sides of the rack 1. The roller 2 slides along the back side of the rack 1. The protective shell 3 is on the toothed side of the rack 1. The roller 2 and the protective shell 3 surround the rack 1 to prevent the protective shell 3 from deviating from the rack 1, so that the device can operate stably.

[0026] The speed measuring gear 4 is surrounded by the protective shell 3. The speed measuring gear 4 is meshed with the rack 1 at the opening. When the construction elevator is raised or lowered, the speed measuring gear 4 rotates accordingly. A connecting shaft is welded to the side wall of the speed measuring gear 4. The connecting shaft is rotatably connected to the protective shell 3. The connecting shaft and the speed measuring gear 4 rotate at the same time. One side wall of the connecting shaft passes through the protective shell 3. A transmission gear 41 is fixedly connected to one end of the connecting shaft. The transmission gear 41 is meshed with the speed sensor 7. The speed sensor 7 can measure the speed of the transmission gear 41, and then determine the moving speed of the construction elevator. When the speed exceeds the set threshold, the speed sensor 7 determines that the construction elevator is in a falling state and transmits a signal to the controller 8. The controller 8 controls the first braking mechanism 5 to start working and brake the construction elevator.

[0027] like Figure 2 As shown, the first brake mechanism 5 includes a brake rack 51 , a connecting plate 52 and a telescopic rod 53 . One end of the connecting plate 52 is connected to the telescopic rod 53 , and the brake rack 51 is fixed to the other end of the connecting plate 52 .

[0028] There are two brake racks 51, which are arranged on both sides of the speed measuring gear 4. The width of the speed measuring gear 4 and the brake rack 51 are both smaller than the width of the rack 1. The brake rack 51 is arranged at the front end of the rack 1. The brake rack 51 and the speed measuring gear 4 can both fit with the rack 1. The brake rack 51 can move back and forth driven by the telescopic rod 53. When the construction elevator is running normally, the brake rack 51 does not contact the rack 1. When the construction elevator falls due to overspeed, the brake rack 51 moves to fit with the rack 1 to prevent the construction elevator from falling.

[0029] There are two groups of telescopic rods 53, which are respectively fixed to the top and bottom of the protective shell 3. The two groups of telescopic rods 53 increase the thrust on the brake rack 51, further ensuring the strength of the brake rack 51. At the same time, the two groups of telescopic rods 53 serve as backup for each other. When one telescopic rod 53 is damaged, the braking operation can still be performed. There are also two groups of connecting plates 52, which are respectively fixed to the upper and lower parts of the brake rack 51. The connecting plate 52 is in a "concave" shape. The two branches of the connecting plate 52 are respectively connected to the two brake racks 51. The connecting plate 52 is also connected to the telescopic rod 53. The telescopic rod 53 drives the connecting plate 52 to move, and further drives the brake rack 51 to move for braking. The telescopic rod 53 can be controlled by the speed sensor 7, and can also be manually started by the elevator driver.

[0030] like Figure 3 As shown, the second braking mechanism 6 includes a driven gear 61, a limiting ring 62 and a positioning rod 63. The driven gear 61 is meshed with the rack 1. The bottom of the driven gear 61 is fixedly connected to the top of the protective shell 3. When the construction elevator moves, the driven gear also rotates. The positioning rod 63 is rotatably connected to one side of the driven gear 61. When the driven gear 61 rotates, the positioning rod 63 will rotate toward the edge of the driven gear 61 under the action of centrifugal force. The limiting ring 62 is arranged on the outside of the driven gear 61.

[0031] A protrusion 611 is provided at the center point of the side wall of the driven gear 61 , two positioning rods 63 are provided, and the two positioning rods 63 are symmetrically arranged with the protrusion 611 as the midpoint. A hook 631 is provided at the front end of the positioning rod 63 , and a spring 612 is connected between the positioning rod 63 and the protrusion 611 .

[0032] A support column 621 is provided at the bottom of the limiting ring 62 , and the support column 621 is fixedly connected to the protective shell 3 . The limiting ring 62 does not contact the driven gear 61 . A plurality of hook teeth 622 are provided in an annular array on the inner wall of the limiting ring 62 , and the hook teeth 622 can be engaged with the hook head 631 .

[0033] When the driven gear 61 rotates normally, the spring 612 tightens the positioning rod 63 to offset the centrifugal force, so that the hook head 631 will not contact the limit ring 62, allowing the driven gear 61 to rotate normally. When the driven gear 61 rotates too fast, the centrifugal force is greater than the tension of the spring 612, causing the hook head 631 to rotate outward. At this time, the hook head 631 is engaged with the hook tooth 622, limiting the movement of the driven gear 61, thereby braking the construction elevator. During production, debugging is performed so that the elevator movement speed does not trigger the speed sensor 7 when the hook head 631 hooks the hook tooth 622. When the elevator descends at a speed slightly exceeding the speed, the hook head 631 contacts the hook tooth 622 to brake the elevator. After braking, the elevator speed slows down, the positioning rod 63 is pulled back, and the speed limit is automatically released. If the elevator does not return to normal speed at this time, it will be braked by the second brake mechanism 6 again. After multiple sudden stops, the elevator driver can manually start the first brake mechanism 5 for braking, which prevents the occasional stall of the construction elevator. The elevator can be stopped at the bottom floor for maintenance, avoiding people being trapped at high altitudes due to minor faults. When the impact force of the elevator is too large and causes the positioning rod 63 to break, the descent rate of the construction elevator exceeds the monitoring threshold of the speed sensor 7, and the first brake mechanism 5 automatically brakes to prevent the construction elevator from falling sharply.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An emergency anti-fall safety device for a construction elevator, comprising: A rack rail (1) for a construction elevator is characterized in that: a roller (2) is slidably connected to the rear end of the rack rail (1), a protective shell (3) is provided at the front end of the rack rail (1), a speed measuring gear (4) is meshed on the rack rail (1), the speed measuring gear (4) is connected to a rotation speed sensor (7), a first brake mechanism (5) is slidably connected to the rear end of the protective shell (3), and a second brake mechanism (6) is provided on the top of the protective shell (3).

2. The emergency anti-falling safety device for a construction elevator according to claim 1 is characterized in that: The protective shell (3) is a rectangular shell, and the protective shell (3) is provided with an opening in the direction of the rack rail (1).

3. The emergency anti-falling safety device for a construction elevator according to claim 2 is characterized in that: The roller (2) and the protective shell (3) are respectively arranged on the front and rear sides of the rack rail (1).

4. The emergency anti-falling safety device for a construction elevator according to claim 3 is characterized in that: A connecting shaft is provided on the side wall of the speed measuring gear (4), and the connecting shaft is rotatably connected to the protective shell (3). A side wall of the connecting shaft passes through the protective shell (3). One end of the connecting shaft is fixedly connected to a transmission gear (41), and the transmission gear (41) is meshed with the speed sensor (7).

5. The emergency anti-falling safety device for a construction elevator according to claim 4 is characterized in that: The first braking mechanism (5) comprises a braking rack (51), a connecting plate (52) and a telescopic rod (53); one end of the connecting plate (52) is connected to the telescopic rod (53), and the braking rack (51) is fixed to the other end of the connecting plate (52).

6. The emergency anti-falling safety device for a construction elevator according to claim 5 is characterized in that: There are two brake racks (51) in total. The brake racks (51) are arranged on both sides of the speed measuring gear (4). The brake racks (51) are arranged at the front end of the rack rail (1). The brake racks (51) can fit the rack rail (1).

7. The emergency anti-falling safety device for a construction elevator according to claim 6 is characterized in that: The telescopic rods (53) are provided in two groups, and the telescopic rods (53) are respectively fixed to the top and the bottom of the protective shell (3). The connecting plates (52) are also provided in two groups, and the connecting plates (52) are respectively fixed to the upper part and the lower part of the braking rack (51).

8. The emergency anti-falling safety device for a construction elevator according to claim 7, characterized in that: The second braking mechanism (6) comprises a driven gear (61), a limiting ring (62) and a positioning rod (63); the driven gear (61) is meshed with the rack (1); the positioning rod (63) is rotatably connected to one side of the driven gear (61); the limiting ring (62) is arranged on the outside of the driven gear (61); and the positioning rod (63) can be clamped on the limiting ring (62).

9. The construction elevator emergency anti-falling safety device according to claim 8, characterized in that: The side wall of the driven gear (61) is provided with a protrusion (611), two positioning rods (63) are provided, a hook (631) is provided at the front end of the positioning rod (63), and a spring (612) is connected between the positioning rod (63) and the protrusion (611).

10. The construction elevator emergency anti-falling safety device according to claim 9, characterized in that: A support column (621) is provided at the bottom of the limiting ring (62), the support column (621) is fixedly connected to the protective shell (3), and a plurality of hook teeth (622) are provided in a circular array on the inner wall of the limiting ring (62).

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