Cage door double-limiting device of construction hoist

Abstract

The utility model relates to a double-limiting device for a cage door of a construction hoist, which is characterized in that when a car body ascends and descends, a safety door lifting mechanism closes an entrance and an exit, at the moment, an upper limiting switch is positioned at the upper part of a mounting seat and is erected on a collision block at the upper part of the mounting seat, and a lower limiting switch is positioned at the lower part of the mounting seat; and a collision block at the lower part of the mounting seat is pressed on the lower limiting switch, so that the lift car body controlled by mechanical contacts in the upper limiting switch and the lower limiting switch can ascend and descend, and when the safety door lifting mechanism is started, the force on the upper limiting switch and the lower limiting switch is relieved, so that the lift car body cannot ascend under the control of the mechanical contacts; therefore, when the entrance and the exit are not closed in place, the lift car body cannot ascend and descend, the safety of the lift is ensured, and when one limiting switch breaks down, the other limiting switch needs to reach the touch position, and the lift car can operate.

Description

Technical Field

[0001] The utility model relates to the technical field of cage door switches for construction elevators, in particular to a double-limiting device for cage doors of construction elevators. Background Art

[0002] Construction elevators are indispensable transportation equipment in most construction projects. Their cages are generally a closed structure welded from steel sections, steel plates and mesh plates. The floor and inner top of the cage are patterned steel plates. There is an exit door on the top of the structure, which can only be used for elevator inspection or emergency. An electrical interlocking device is installed on the cage, and the cage stops working when the cage door is opened to ensure safety.

[0003] When opening and closing traditional cage doors, a limit switch is used to limit the lifting height of the cage door, so that the limit switch uses mechanical contacts to control the lifting of the elevator, thereby improving the safety of the construction elevator. However, traditional cage doors are used for a long time in a construction environment and will be eroded by external factors such as rain, causing the position of the limit switch contacts to change, making maintenance difficult. In addition, there are cases where the cage door is hit during transportation, causing the mechanical contact position of the limit switch to shift, causing the elevator to start lifting when the cage door is not completely closed, greatly increasing safety hazards and making it easy for operators to fall. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In order to solve the above problems in the prior art, the utility model provides a double limit device for the cage door of a construction elevator, which can better sense the closing status of the cage door, so that the cage door starts to rise and fall after it is closed in place, thereby improving the safety of the elevator and making better use of the limit switch.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] A double limit device for a cage door of a construction elevator comprises a car body, a safety door lifting mechanism and a travel limit mechanism, wherein the car body is provided with an inlet and outlet, the safety door lifting mechanism is provided at the inlet and outlet and connected to the car body, one side of the travel limit mechanism is connected to the car body, and the other side of the travel limit mechanism is connected to the safety door lifting mechanism;

[0009] The travel limit mechanism includes an upper limit switch, a lower limit switch and a touch assembly, the upper limit switch is arranged on the upper part of the car body, the lower limit switch is arranged below the upper limit switch, the upper limit switch and the lower limit switch are both connected to the car body, the upper part of the safety door lifting mechanism is provided with the touch assembly, and the upper limit switch and the lower limit switch are both movably connected to the touch assembly;

[0010] The contact assembly includes a mounting seat, a contact block and a pressure plate. The mounting seat is detachably connected to the safety door lifting mechanism. The upper and lower parts of the mounting seat are both provided with slides. The slides are both provided with slots adapted to the contact blocks. One of the contact blocks is slidably connected to one of the slots. The pressure plate is pressed at the opening of the slot and is detachably connected to the mounting seat.

[0011] Furthermore, the safety door lifting mechanism includes a rotating drive member, a transmission belt, a lifting assembly, a first slider and a cage door. The cage door is provided at the entrance and exit, and a first slide groove matched with the first slider is provided on the car. The cage door is slidably connected to the first slide groove through the first slider. A lifting assembly is provided on both sides of the cage door. One lifting assembly is transmission-connected to another lifting assembly through a transmission belt. The rotating drive member is drivingly connected to one lifting assembly, and the mounting seat is detachably connected to the upper part of the cage door.

[0012] Furthermore, the lifting assembly includes a screw, a second slider, a traction rope and a rotating wheel, the rotating wheel is provided on the top of the car body, the traction rope is laid on the rotating wheel, one end of the traction rope is connected to the lower part of the cage door, the other end of the traction rope is provided with the second slider, and a second slide groove matched with the second slider is provided on the outside of the car, the second slider is slidably connected to the second slide groove, the screw is penetrated through the middle of the second slider and is rotatably connected to the car body, one screw is transmission-connected to the other screw through the transmission belt, and the rotating drive member is drivingly connected to one screw.

[0013] Furthermore, it also includes supporting feet, and a plurality of the supporting feet are fixedly connected to the lower surface of the car body.

[0014] Furthermore, it also includes a PLC controller, which is electrically connected to the car body, the safety door lifting mechanism and the travel limit mechanism respectively.

[0015] (III) Beneficial effects

[0016] The beneficial effects of the utility model are as follows: in actual use, when the car body is being lifted or lowered, the safety door lifting mechanism closes the inlet and outlet, at which time the upper limit switch is located at the upper position of the mounting seat, and the upper limit switch is mounted on the bumper block at the upper part of the mounting seat, the lower limit switch is located at the lower position of the mounting seat, and the bumper block at the lower part of the mounting seat is pressed on the lower limit switch, so that the car body controlled by the mechanical contacts in the upper limit switch and the lower limit switch can be lifted or lowered, and when the safety door lifting mechanism is opened, the force on the upper limit switch and the lower limit switch is released, so that the car body controlled by the mechanical contacts cannot be lifted or lowered, thereby making the inlet and outlet in the When it is not closed in place, the car body cannot be raised or lowered, thus ensuring the safety of the elevator. When one of the limit switches fails, the other limit switch must also reach the contact position before the car can operate. When the contact block is eroded by rain after long-term use and produces problems such as rust, the distance between the contact block and the upper limit switch or the lower limit switch will become farther. The contact block can be removed from the slot and replaced with a new one, so that the upper limit switch and the lower limit switch can better contact with the contact block, thereby better sensing the closing status of the cage door, so that the cage door starts to rise and fall after it is closed in place, thereby improving the safety of the elevator and making better use of the limit switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the double-limiting device for the cage door of a construction elevator according to an embodiment of the utility model;

[0018] Figure 2 A cross-sectional view of a double-limiting device for a cage door of a construction elevator according to an embodiment of the utility model;

[0019] Figure 3 A schematic diagram of a travel limit mechanism of a double limit device for a cage door of a construction elevator according to an embodiment of the utility model;

[0020] [Description of Reference Numerals]

[0021] The second slider 1, the rotating wheel 2, the screw 3, the cage door 4, the traction rope 5, the rotating drive member 6, the supporting foot 7, the car body 8, the touch assembly 9, the upper limit switch 10, the lower limit switch 11, the touch block 901, the mounting seat 902, and the pressure plate 903. DETAILED DESCRIPTION

[0022] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0023] Please refer to Figures 1 to 3As shown, a double-limiting device for a cage door of a construction elevator of the utility model comprises a car body 8, a safety door lifting mechanism and a travel limiting mechanism, the car body 8 is provided with an inlet and outlet, the safety door lifting mechanism is arranged at the inlet and outlet and connected to the car body 8, one side of the travel limiting mechanism is connected to the car body 8, and the other side of the travel limiting mechanism is connected to the safety door lifting mechanism;

[0024] The travel limit mechanism includes an upper limit switch 10, a lower limit switch 11 and a touch assembly 9. The upper limit switch 10 is arranged on the upper part of the car body 8, and the lower limit switch 11 is arranged below the upper limit switch 10. The upper limit switch 10 and the lower limit switch 11 are both connected to the car body 8. The upper part of the safety door lifting mechanism is provided with the touch assembly, and the upper limit switch 10 and the lower limit switch 11 are both movably connected to the touch assembly.

[0025] The contact assembly includes a mounting seat 902, a collision block 901 and a pressure plate 903. The mounting seat 902 is detachably connected to the safety door lifting mechanism. The upper and lower parts of the mounting seat 902 are both provided with slides, and the slides are both provided with slots adapted to the collision block 901. The collision block 901 is slidably connected to the slot, and the pressure plate 903 is pressed at the opening of the slot and is detachably connected to the mounting seat 902.

[0026] The working principle of the utility model is as follows: in actual use, when the car body 8 is being lifted or lowered, the safety door lifting mechanism closes the inlet and outlet, at which time the upper limit switch 10 is located at the upper position of the mounting seat 902, and the upper limit switch 10 is mounted on the bumper 901 at the upper part of the mounting seat 902, the lower limit switch 11 is located at the lower position of the mounting seat 902, and the bumper 901 at the lower part of the mounting seat 902 is pressed on the lower limit switch 11, so that the car body 8 controlled by the mechanical contacts in the upper limit switch 10 and the lower limit switch 11 can be lifted or lowered, and when the safety door lifting mechanism is opened, the upper limit switch 10 and the lower limit switch The force on the switch 11 is released, so that the car body 8 cannot rise by controlling the mechanical contacts, so that the car body 8 cannot be raised or lowered when the entrance and exit are not closed in place, thereby ensuring the safety of the elevator. When one of the limit switches fails, the other limit switch must also reach the contact position before the car can operate. When the bumper 901 is eroded by rain after long-term use and produces rust and other problems, the distance between the bumper 901 and the upper limit switch 10 or the lower limit switch 11 will become farther. The bumper 901 can be removed from the slot and replaced with a new bumper 901, so that the upper limit switch 10 and the lower limit switch 11 can better contact with the bumper 901.

[0027] Furthermore, the safety door lifting mechanism includes a rotating drive member 6, a transmission belt, a lifting assembly, a first slider and a cage door 4. The cage door 4 is provided at the entrance and exit, and a first slide groove matched with the first slider is provided on the car. The cage door 4 is slidably connected to the first slide groove through the first slider. A lifting assembly is provided on both sides of the cage door 4. One lifting assembly is transmission-connected to another lifting assembly through a transmission belt. The rotating drive member 6 is drivingly connected to one lifting assembly, and the mounting seat 902 is detachably connected to the upper part of the cage door 4.

[0028] From the above description, it can be seen that when it is necessary to control the lifting of the cage door 4, the rotating driving member 6 can be operated, so that the rotating driving member 6 drives a lifting component to move, and then the one lifting component drives another lifting component to move through the transmission belt, so that the lifting component drives the cage door 4 to lift and lower at the same time. The cage door 4 slides inside the first slide groove through the first slider during the lifting and lowering, so that the lifting and lowering of the cage door 4 is more stable.

[0029] Furthermore, the lifting assembly includes a screw rod 3, a second slider 1, a traction rope 5 and a rotating wheel 2. The rotating wheel 2 is provided on the top of the car body, the traction rope 5 is laid on the rotating wheel 2, one end of the traction rope 5 is connected to the lower part of the cage door 4, the other end of the traction rope 5 is provided with the second slider 1, and a second slide groove matched with the second slider 1 is provided on the outside of the car, the second slider 1 is slidably connected to the second slide groove, the screw rod 3 is penetrated through the middle of the second slider 1, and is rotatably connected to the car body 8, one screw rod 3 is transmission-connected to another screw rod 3 through the transmission belt, and the rotating drive member 6 is drivingly connected to one screw rod 3.

[0030] From the above description, it can be seen that it is beneficial to operate the rotating drive member 6, so that the rotating drive member 6 drives a screw 3 to rotate, and then one screw 3 drives another screw 3 to rotate through a transmission belt, so that the second slider 1 is driven by the first screw 3 to rise and fall inside the second slide groove. While the second slider 1 is rising and falling, the traction rope 5 slides on the rotating wheel 2, so that one end of the traction rope 5 is pulled down under the drive of the second slider 1, and the other end of the traction rope 5 lifts the cage door 4.

[0031] Furthermore, it also includes supporting legs 7, and a plurality of the supporting legs 7 are fixedly connected to the lower surface of the car body 8.

[0032] It can be seen from the above description that this is conducive to making the car body 8 more stable when landing.

[0033] Furthermore, it also includes a PLC controller, which is electrically connected to the car body 8, the safety door lifting mechanism and the travel limit mechanism respectively.

[0034] From the above description, it can be seen that it is beneficial to adjust the parameters of the double limit device of the cage door of the construction elevator through the PLC controller, and it is more convenient for operators to operate the double limit device of the cage door of the construction elevator.

[0035] Embodiment 1

[0036] Please refer to Figures 1 to 3 A double limit device for a cage door of a construction elevator comprises a car body 8, a safety door lifting mechanism and a travel limit mechanism, wherein the car body 8 is provided with an inlet and outlet, the safety door lifting mechanism is provided at the inlet and outlet and connected to the car body 8, one side of the travel limit mechanism is connected to the car body 8, and the other side of the travel limit mechanism is connected to the safety door lifting mechanism;

[0037] The travel limit mechanism includes an upper limit switch 10, a lower limit switch 11 and a touch assembly 9. The upper limit switch 10 is arranged on the upper part of the car body 8, and the lower limit switch 11 is arranged below the upper limit switch 10. The upper limit switch 10 and the lower limit switch 11 are both connected to the car body 8. The upper part of the safety door lifting mechanism is provided with the touch assembly, and the upper limit switch 10 and the lower limit switch 11 are both movably connected to the touch assembly.

[0038] The contact assembly includes a mounting seat 902, a collision block 901 and a pressure plate 903. The mounting seat 902 is detachably connected to the safety door lifting mechanism. The mounting seat 902 is provided with a slideway at the upper and lower parts. The slideway is provided with a slot adapted to the collision block 901. The collision block 901 is slidably connected to the slot. The pressure plate 903 is pressed at the opening of the slot and is detachably connected to the mounting seat 902.

[0039] The pressing plate 903 is detachably connected to the mounting seat 902 via bolts;

[0040] The safety door lifting mechanism includes a rotating driving member 6, a transmission belt, a lifting assembly, a first slider and a cage door 4. The cage door 4 is provided at the entrance and exit, and a first slide groove adapted to the first slider is provided on the car. The cage door 4 is slidably connected to the first slide groove through the first slider. A lifting assembly is provided on both sides of the cage door 4. One lifting assembly is transmission-connected to another lifting assembly through a transmission belt. The rotating driving member 6 is drivingly connected to one lifting assembly, and the mounting seat 902 is detachably connected to the upper portion of the cage door 4.

[0041] The lifting assembly includes a screw rod 3, a second slider 1, a traction rope 5 and a rotating wheel 2. The rotating wheel 2 is provided on the top of the car body. The traction rope 5 is laid on the rotating wheel 2. One end of the traction rope 5 is connected to the lower part of the cage door 4. The other end of the traction rope 5 is provided with the second slider 1. The outside of the car is provided with a second slide groove adapted to the second slider 1. The second slider 1 is slidably connected to the second slide groove. The screw rod 3 is penetrated in the middle of the second slider 1 and is rotatably connected to the car body 8. One screw rod 3 is connected to another screw rod 3 through the transmission belt. The rotating drive member 6 is connected to one screw rod 3 in a driving manner.

[0042] A through hole is provided in the middle of the second sliding block 1, and an internal thread matching the screw rod 3 is provided inside the through hole. The screw rod 3 passes through the through hole and meshes with the internal thread.

[0043] The rotating drive member 6 is detachably connected to the bottom of the car body 8;

[0044] The rotating wheel 2 is a fixed pulley;

[0045] It also includes support legs 7, and a plurality of the support legs 7 are fixedly connected to the lower surface of the car body 8 by welding;

[0046] It also includes a PLC controller, which is electrically connected to the car body 8, the safety door lifting mechanism and the travel limit mechanism respectively;

[0047] The PLC controller model is DATA-7311, and the PLC controller is respectively connected to the car body 8, the upper limit switch 10, the lower limit switch 11 and the rotating drive member 6.

[0048] The above shows and describes the basic principle, main features and advantages of the utility model, and the standard parts used in the utility model can be purchased from the market, special-shaped parts can be customized according to the description and the drawings, and the specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0049] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A double limit device for a cage door of a construction elevator, characterized in that: It includes a car body, a safety door lifting mechanism and a travel limiting mechanism, wherein the car body is provided with an inlet and outlet, the safety door lifting mechanism is provided at the inlet and outlet and connected to the car body, one side of the travel limiting mechanism is connected to the car body, and the other side of the travel limiting mechanism is connected to the safety door lifting mechanism; The travel limit mechanism includes an upper limit switch, a lower limit switch and a touch assembly, the upper limit switch is arranged on the upper part of the car body, the lower limit switch is arranged below the upper limit switch, the upper limit switch and the lower limit switch are both connected to the car body, the upper part of the safety door lifting mechanism is provided with the touch assembly, and the upper limit switch and the lower limit switch are both movably connected to the touch assembly; The contact assembly includes a mounting seat, a contact block and a pressure plate. The mounting seat is detachably connected to the safety door lifting mechanism. The upper and lower parts of the mounting seat are both provided with slides. The slides are both provided with slots adapted to the contact blocks. One of the contact blocks is slidably connected to one of the slots. The pressure plate is pressed at the opening of the slot and is detachably connected to the mounting seat.

2. The double limit device for the cage door of a construction elevator as claimed in claim 1, characterized in that: The safety door lifting mechanism includes a rotating drive member, a transmission belt, a lifting assembly, a first slider and a cage door. The cage door is provided at the entrance and exit, and a first slide groove matched with the first slider is provided on the car. The cage door is slidably connected to the first slide groove through the first slider. A lifting assembly is provided on both sides of the cage door. One lifting assembly is transmission-connected to another lifting assembly through a transmission belt. The rotating drive member is drivingly connected to one lifting assembly, and the mounting seat is detachably connected to the upper part of the cage door.

3. The double limit device for the cage door of a construction elevator as claimed in claim 2, characterized in that: The lifting assembly includes a screw, a second slider, a traction rope and a rotating wheel. The rotating wheel is arranged on the top of the car body, the traction rope is laid on the rotating wheel, one end of the traction rope is connected to the lower part of the cage door, the other end of the traction rope is arranged with the second slider, and a second slide groove adapted to the second slider is arranged outside the car, the second slider is slidably connected to the second slide groove, the screw is penetrated through the middle of the second slider, and is rotatably connected to the car body, one screw is transmission-connected to the other screw through the transmission belt, and the rotating drive member is drivingly connected to one screw.

4. The double limit device for the cage door of a construction elevator as claimed in claim 1, characterized in that: It also includes supporting feet, and a plurality of the supporting feet are fixedly connected to the lower surface of the car body.

5. The double limit device for the cage door of a construction elevator as claimed in claim 1, characterized in that: It also includes a PLC controller, which is electrically connected to the car body, the safety door lifting mechanism and the travel limit mechanism respectively.

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