Anti-pinch device for cage door of construction hoist and construction hoist with anti-pinch device

Abstract

The utility model discloses an anti-pinch device for a cage door of a construction hoist and the construction hoist with the anti-pinch device. The anti-pinch device for the cage door of the construction hoist comprises a laser scanning mechanism, an executing mechanism and a controller, and the laser scanning mechanism is arranged on a cage of the construction hoist and used for collecting the obstacle distance value of the door body area of the cage; the executing mechanism is connected with a cage door of the cage and used for driving the cage door to be opened or closed. The controller is connected with the laser scanning mechanism and the executing mechanism and used for receiving the obstacle distance value and sending a control instruction to the executing mechanism. Thus, the anti-pinch design of the cage door can be achieved on the basis of being compatible with the structure of an existing construction hoist, in addition, the anti-pinch requirements for entering and exiting of various objects and personnel can be met based on the obstacle distance value collected by the laser scanning mechanism, the anti-pinch reliability is improved, and the operation safety requirement of the construction hoist can be met.

Description

Technical Field

[0001] The utility model relates to the field of construction elevators, in particular to an anti-pinch device for a cage door of a construction elevator and a construction elevator with the device. Background Art

[0002] As equipment used for vertical transportation in the construction field, the main function of a construction elevator is to transport construction workers and materials to buildings under construction. A construction elevator is mainly composed of a cage and several standard sections. Each standard section is of a fixed length. Several standard sections are fixed together and installed on the ground. Wall attachment devices are provided at different heights so that the standard sections are attached to the building to form a track. The standard sections are also equipped with racks. A transmission mechanism with an output gear is provided on the cage. The cage is fixed to the standard section by rollers, and the transmission output gear on the cage is fully engaged with the rack of the standard section. When the transmission structure of the cage is running, it will drive the construction elevator cage to move up and down along the standard section.

[0003] The cage of a construction elevator is a relatively closed box, generally 1.5 meters wide, 3 meters long, and more than two meters high. All people or goods are loaded in the cage, and there are passage doors (i.e. cage doors) at the front and back of the cage for people or goods to enter and exit.

[0004] In the related art, most construction elevator cage doors are opened and closed manually. With the continuous improvement of construction site requirements and the development of automated control technology, there is a method of using electric opening and closing of construction elevator cage doors, which not only reduces the labor intensity of drivers and passengers, but also improves the user experience of the equipment. However, if the electric control-based cage door opening and closing method is not properly controlled, it will cause accidents in which people are pinched, and there is an urgent need to implement an anti-pinch design for the cage door; in addition, the number of existing construction elevators on the market is huge, and there is no effective solution for how to implement anti-pinch design modifications based on the structure of existing construction elevators. Utility Model Content

[0005] In view of this, an embodiment of the utility model provides an anti-pinch device for a construction elevator cage door and a construction elevator having the same, aiming to realize the anti-pinch design of the cage door on the basis of being compatible with the structure of the existing construction elevator and meet the operation safety requirements of the construction elevator.

[0006] The technical solution of the utility model embodiment is achieved as follows:

[0007] In a first aspect, an embodiment of the utility model provides an anti-pinch device for a cage door of a construction elevator, comprising:

[0008] A laser scanning mechanism is provided on the cage of the construction elevator and is used to collect obstacle distance values ​​in the door area of ​​the cage;

[0009] An actuator, connected to the cage door of the cage, and used to drive the cage door to open or close;

[0010] A controller is connected to the laser scanning mechanism and the actuator, and is used to receive the obstacle distance value and send a control instruction to the actuator.

[0011] In the above scheme, the cage includes a first cage door located at the first exit side and a second cage door located at the second exit side; the laser scanning mechanism includes: a first laser scanning mechanism and a second laser scanning mechanism, and the actuator includes: a first actuator and a second actuator;

[0012] Among them, the first laser scanning mechanism and the first actuator are arranged corresponding to the first cage door, the first laser scanning mechanism is used to collect the first obstacle distance value of the door body area of ​​the first cage door, and the first actuator is used to drive the first cage door to open or close; the second laser scanning mechanism and the second actuator are arranged corresponding to the second cage door, the second laser scanning mechanism is used to collect the second obstacle distance value of the door body area of ​​the second cage door, and the second actuator is used to drive the second cage door to open or close.

[0013] In the above solution, the first laser scanning mechanism and the second laser scanning mechanism both include:

[0014] A laser distance measuring element, used for collecting obstacle distance values ​​in the door area of ​​the cage;

[0015] A rotating mechanism, connected to the laser distance measuring element, and used to drive the laser distance measuring element to adjust the measuring angle;

[0016] A rotation position measuring device, used to detect the rotation angle of the rotating mechanism;

[0017] The controller is connected to the laser distance measuring element and the rotation position measuring device, and is used for receiving the obstacle distance value and the rotation angle.

[0018] In the above solution, the first actuator and / or the second actuator includes: an electric drive unit, a hydraulic drive unit or a pneumatic drive unit.

[0019] In the above scheme, the controller is configured to determine whether there is an obstacle in the door area based on the obstacle distance value. If there is an obstacle, the door closing signal sent to the actuator corresponding to the door area is shielded or the door closing action of the corresponding actuator is stopped.

[0020] In a second aspect, an embodiment of the utility model provides a construction elevator, including: an anti-pinch device for a cage door of a construction elevator as described in the first aspect of the embodiment of the utility model.

[0021] In the above solution, the cage of the construction elevator includes a first cage door located on the first exit side and a second cage door located on the second exit side.

[0022] In the above solution, the first cage door is a single-door structure, and the second cage door is a double-door structure.

[0023] In the technical solution provided by the embodiment of the utility model, the anti-pinch device for the cage door of the construction elevator includes: a laser scanning mechanism, an actuator and a controller. The laser scanning mechanism is arranged on the cage of the construction elevator, and is used to collect the obstacle distance value of the door area of ​​the cage; the actuator is connected to the cage door of the cage, and is used to drive the cage door to open or close; the controller is connected to the laser scanning mechanism and the actuator, and is used to receive the obstacle distance value and send a control instruction to the actuator. In this way, the controller of the construction elevator can control the actuator to perform anti-pinch control based on the obstacle distance value of the laser scanning mechanism, and then realize the anti-pinch design of the cage door on the basis of being compatible with the structure of the existing construction elevator. In addition, the obstacle distance value collected based on the laser scanning mechanism can meet the anti-pinch requirements of various objects and personnel entering and exiting, improve the reliability of anti-pinch, and meet the operation safety requirements of the construction elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the anti-pinch device for the cage door of a construction elevator according to an embodiment of the utility model;

[0025] Figure 2 It is a structural schematic diagram of an anti-pinch device for a cage door of a construction elevator in an application example of the utility model;

[0026] Figure 3 This is a structural schematic diagram of a laser scanning mechanism in an application example of the utility model;

[0027] Figure 4 It is a structural schematic diagram of a construction elevator in an application example of the utility model.

[0028] Description of reference numerals:

[0029] 100, laser scanning mechanism; 101, first laser scanning mechanism; 102, second laser scanning mechanism;

[0030] 103. Laser distance measuring element; 104. Rotation mechanism; 105. Rotation position measuring device;

[0031] 106. Install the bracket;

[0032] 200, executive body; 201, first executive body; 202, second executive body;

[0033] 300, controller; 400, construction hoist;

[0034] 401, standard section; 402, cage; 403, lifting drive motor;

[0035] 404, single door; 405, double door. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it can be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0038] In the description of the present invention, the terms "first, second" and the like are only used to distinguish similar objects and do not represent a specific order of the objects. It is understandable that "first, second" and the like can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein. Unless otherwise specified, "plurality" means at least two.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the related art, in order to prevent the cage door of the construction elevator from clamping people or objects, an infrared cross-beam detection method is often adopted, that is, infrared transceiver sensors are installed on both sides of the cage door. When there is an object blocking it, the infrared sensor will not receive the infrared signal from the other end. When this happens, the infrared sensor will send this blocking signal to the controller, and the controller will control the door closing mechanism to interrupt or not execute the door closing command, thereby playing an anti-pinch function.

[0042] However, in practical applications, the above infrared detection method has the following defects:

[0043] 1) Infrared emission and reception as regional protection is feasible for larger objects or personnel, but it is somewhat difficult for small objects such as steel bars. If some small objects are to be detected, the density of sensor layout must be increased, which increases the complexity and cost of the system;

[0044] 2) As a kind of equipment for transporting construction workers and building materials, the construction hoist is used in an extremely harsh environment. There are various dry and wet objects and a lot of dust, which seriously pollutes the sensor, often causing false operation and low reliability.

[0045] 3) The infrared transceiver sensor is composed of multiple sets of transmitting and receiving infrared tubes. The reliability of each pair of tubes will affect the reliability of the entire system, and malfunctions often occur;

[0046] 4) Construction hoist is an outdoor operation equipment, and the infrared device is easily disturbed by sunlight and may cause malfunction.

[0047] Based on this, the embodiment of the utility model provides a construction elevator cage door anti-pinch device, such as Figure 1As shown, the anti-pinch device for the cage door of the construction elevator comprises: a laser scanning mechanism 100, an actuator 200 and a controller 300. The laser scanning mechanism 100 is arranged on the cage of the construction elevator, and is used to collect the obstacle distance value of the door area of ​​the cage; the actuator 200 is connected to the cage door of the cage, and is used to drive the cage door to open or close; the controller 300 is connected to the laser scanning mechanism 100 and the actuator 200, and is used to receive the obstacle distance value and send a control instruction to the actuator 200.

[0048] It should be noted that, in the embodiment of the utility model, by introducing the laser scanning mechanism 100 in the scenario of the construction elevator, the controller 300 can compare the received obstacle distance value with the preset obstacle distance value to realize intelligent detection of whether there is an obstacle in the door area of ​​the cage, and send a control instruction to the actuator 200 based on the detection result of the obstacle, so as to meet the anti-pinch requirements of various objects and personnel entering and exiting based on the obstacle distance value. It is not only compatible with the structural foundation of the existing construction elevator, but also can effectively avoid the above-mentioned defects caused by the use of infrared sensors, that is, the anti-pinch device of the embodiment of the utility model can reduce the complexity and cost of the system (especially the hardware cost caused by detecting small objects), and can also reduce the system malfunction caused by the misdetection of some infrared radiating tubes, etc., thereby effectively improving the reliability of the anti-pinch function of the construction elevator.

[0049] Exemplarily, the cage includes a first cage door located on the first exit side and a second cage door located on the second exit side; the laser scanning mechanism includes: a first laser scanning mechanism and a second laser scanning mechanism, and the actuator includes: a first actuator and a second actuator; wherein, the first laser scanning mechanism and the first actuator are arranged corresponding to the first cage door, the first laser scanning mechanism is used to collect a first obstacle distance value in the door body area of ​​the first cage door, and the first actuator is used to drive the first cage door to open or close; the second laser scanning mechanism and the second actuator are arranged corresponding to the second cage door, the second laser scanning mechanism is used to collect a second obstacle distance value in the door body area of ​​the second cage door, and the second actuator is used to drive the second cage door to open or close.

[0050] In an application example, Figure 2As shown, for a cage with two cage doors, the anti-pinch device for the cage door of the construction elevator of the utility model embodiment includes: a controller 300, a first laser scanning mechanism 101, a second laser scanning mechanism 102, a first actuator 201 and a second actuator 202. The first laser scanning mechanism 101 can be set at the top of the cage and facing the door body area of ​​the first cage door, and is used to detect the real-time obstacle distance value of the door body area of ​​the first cage door. The controller 300 can determine whether there is an obstacle in the door body area based on the obstacle distance value collected by the first laser scanning mechanism 101, by comparing it with the preset obstacle distance value; the controller 300 can control the first actuator 201 according to the analysis result of the obstacle. For example, if an obstacle is detected, it will not send a door closing signal to the first actuator 201 or stop the first actuator 201 from driving the closing of the first cage door, thereby realizing the anti-pinch control of the first cage door. Similarly, the second laser scanning mechanism 102 can be set at the top of the cage and facing the door body area of ​​the second cage door, for capturing the real-time obstacle distance value of the door body area of ​​the second cage door. The controller 300 can determine whether there is an obstacle based on the obstacle distance value received by the second laser scanning mechanism 102 by comparing it with the preset obstacle distance value; the controller 300 can control the second actuator 202 according to the analysis results of the obstacle. For example, if an obstacle is detected, it will not send a closing signal to the second actuator 202 or stop the second actuator 202 from driving the closing of the second cage door, thereby realizing anti-pinch control of the second cage door.

[0051] For example, Figure 3 As shown, the first laser scanning mechanism and the second laser scanning mechanism both include: a laser distance measuring element 103, a rotating mechanism 104 and a rotating position measuring device 105. The laser distance measuring element 103 is used to collect the obstacle distance value of the door body area of ​​the cage; the rotating mechanism 104 is connected to the laser distance measuring element 103, and is used to drive the laser distance measuring element 103 to adjust the measurement angle; the rotating position measuring device 105 is used to detect the rotation angle of the rotating mechanism; the controller 300 is connected to the laser distance measuring element 103 and the rotating position measuring device 105, and is used to receive the obstacle distance value and the rotation angle.

[0052] It should be noted that the laser ranging element 103 can be understood as a sensor for ranging based on the time of flight (TOF) of the laser beam. The laser beam is different from ordinary natural light and has monochromaticity, coherence, high brightness, and high phase fixity. It is realized based on these characteristics of the laser in combination with other corresponding components. Exemplarily, the laser ranging element 103 may include: a laser transmitter for emitting a laser beam and a laser receiver for receiving the reflected laser beam. The ranging method of the laser ranging element 103 has a high degree of accuracy and resolution, which can better meet the object detection under complex working conditions such as building materials in construction scenes.

[0053] Exemplarily, the controller 300 may also control the rotation of the rotating mechanism 104 via the rotation driving unit, thereby driving the laser ranging element 103 to adjust the measurement angle, thereby realizing the detection of the laser scanning surface at multiple angles.

[0054] Exemplarily, the laser scanning mechanism may further include a mounting bracket 106 for mounting the laser scanning mechanism on the cage. For example, it may be mounted on the top of the cage on the inside of the door or on the columns on both sides of the inside of the door. This embodiment of the present application is not limited to this.

[0055] Exemplarily, when the rotating mechanism 104 is working, the laser ranging element 103 measures the distance in real time. The distance and the data obtained by the rotation position measuring device 105 can be synchronously sent to the controller 300. If it is an initial empty door calibration, these two sets of data complete the empty door data storage; when it is a normal detection of the empty door state, it will be compared with the laser measurement data of the corresponding angle of the empty door previously saved. If the distance value deviates too much, it is determined that there is an obstruction at this position. At this time, the controller 300 will shield the closing signal sent to the actuator corresponding to the door body area or stop the closing action of the corresponding actuator.

[0056] Exemplarily, the first actuator and / or the second actuator include: an electric drive unit, a hydraulic drive unit or a pneumatic drive unit. It should be noted that the actuator for driving the cage door to open or close in the embodiment of the utility model can adopt an electric, hydraulic or pneumatic drive unit, as long as it can drive the cage door to move, and the embodiment of the utility model does not limit this.

[0057] Exemplarily, the controller is configured to determine whether there is an obstacle in the door area based on the obstacle distance value, and if there is an obstacle, shield the door closing signal sent to the actuator corresponding to the door area or stop the door closing action of the corresponding actuator.

[0058] It can be understood that the controller can compare and judge the obstacle distance values ​​detected at different angles based on the pre-configured empty door data, thereby realizing automatic detection of whether there are obstacles in the door body area, and performing anti-pinch control on the cage door based on the detection result. For example, when it is determined that there is an obstacle, the door closing signal sent to the actuator corresponding to the door body area is shielded or the door closing action of the corresponding actuator is stopped, thereby being able to meet the anti-pinch requirements of various objects and personnel entering and exiting based on the obstacle distance value, thereby improving the reliability of anti-pinch and meeting the operation safety requirements of construction elevators.

[0059] The embodiment of the utility model further provides a construction elevator, comprising the anti-pinch device for the cage door of the construction elevator described in the embodiment of the utility model.

[0060] Exemplarily, the cage of the construction elevator includes a first cage door located at a first exit side and a second cage door located at a second exit side.

[0061] Exemplarily, the first cage door is a single-door structure, and the second cage door is a double-door structure.

[0062] Among them, the difference between the single-door structure and the double-door structure is that the single-door structure is a whole piece of metal door, which is fixed by sliding on the vertical tracks on both sides of the door panel. When the door is closed, the door panel slides downward to close the cage door; when the door needs to be opened, the door panel slides upward along the fixed tracks on both sides to open; the double-door structure is provided with two pieces of metal doors, which are respectively slidably fixed in the tracks on both sides of the door panel. When opening the door, one door slides upward and the other slides downward; when closing, the two doors slide in opposite directions until the two doors touch each other to close the door.

[0063] In an application example, Figure 4 As shown, the construction elevator 400 includes a plurality of standard sections 401 and a cage 402. The plurality of standard sections 401 are fixedly connected together and then installed on the ground. Wall attachment devices are provided at different heights so that the standard sections 401 are attached to the building to form a track. The standard sections 401 are also provided with racks. The cage 402 is provided with a transmission mechanism with an output gear. The cage 402 is fixed to the standard sections 401 by rollers. The construction elevator 400 also includes a lifting drive motor 403. The lifting drive motor 403 drives the transmission output gear on the cage 402 to move on the rack formed by the standard sections 401, thereby driving the cage 402 of the construction elevator 400 to move up and down along the standard sections 401.

[0064] The cage 402 includes a single door 404 at the left exit side and a double door 405 at the right exit side, and a first actuator ( Figure 4), driving the second actuator (not shown) of the double door 405 to open or close. Figure 4 (not shown in the figure), a first laser scanning mechanism 101 is set on the side of the top of the cage 402 facing the single-opening door 404, and a second laser scanning mechanism 102 is set on the side of the top of the cage 402 facing the double-opening door 405.

[0065] It is understandable that the cage 402 may also be provided with a controller for controlling the door body switch, and the controller may determine whether there is an obstacle based on the obstacle distance value collected by the first laser scanning mechanism 101 and the received obstacle distance value compared with the preset empty door data; the controller may control the first actuator according to the obstacle analysis result, for example, if an obstacle is detected, no door closing signal will be sent to the first actuator or the first actuator will be stopped from driving the single door 404 to close, thereby realizing the anti-pinch control of the single door 404. Similarly, the controller may also determine whether there is an obstacle based on the obstacle distance value collected by the second laser scanning mechanism 102 and the received obstacle distance value compared with the preset empty door data; the controller may control the second actuator according to the obstacle analysis result, for example, if an obstacle is detected, no door closing signal will be sent to the second actuator or the second actuator will be stopped from driving the double door 405 to close, thereby realizing the anti-pinch control of the double door 405.

[0066] It should be noted that the technical solutions described in the embodiments of the present utility model can be combined arbitrarily without conflict.

[0067] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A construction elevator cage door anti-pinch device, characterized in that: include: A laser scanning mechanism is provided on the cage of the construction elevator and is used to collect obstacle distance values ​​in the door area of ​​the cage; An actuator, connected to the cage door of the cage, and used to drive the cage door to open or close; A controller is connected to the laser scanning mechanism and the actuator, and is used to receive the obstacle distance value and send a control instruction to the actuator.

2. The anti-pinch device according to claim 1, characterized in that: The cage includes a first cage door located at the first exit side and a second cage door located at the second exit side; the laser scanning mechanism includes: a first laser scanning mechanism and a second laser scanning mechanism, and the actuator includes: a first actuator and a second actuator; Among them, the first laser scanning mechanism and the first actuator are arranged corresponding to the first cage door, the first laser scanning mechanism is used to collect the first obstacle distance value of the door body area of ​​the first cage door, and the first actuator is used to drive the first cage door to open or close; the second laser scanning mechanism and the second actuator are arranged corresponding to the second cage door, the second laser scanning mechanism is used to collect the second obstacle distance value of the door body area of ​​the second cage door, and the second actuator is used to drive the second cage door to open or close.

3. The anti-pinch device according to claim 2, characterized in that: The first laser scanning mechanism and the second laser scanning mechanism both include: A laser distance measuring element, used for collecting obstacle distance values ​​in the door area of ​​the cage; A rotating mechanism, connected to the laser distance measuring element, and used to drive the laser distance measuring element to adjust the measuring angle; A rotation position measuring device, used to detect the rotation angle of the rotating mechanism; The controller is connected to the laser distance measuring element and the rotation position measuring device, and is used for receiving the obstacle distance value and the rotation angle.

4. The anti-pinch device according to claim 2, characterized in that: The first actuator and / or the second actuator includes: an electric drive unit, a hydraulic drive unit or a pneumatic drive unit.

5. The anti-pinch device according to any one of claims 1 to 4, characterized in that: The controller is configured to determine whether there is an obstacle in the door body area based on the obstacle distance value, and if there is an obstacle, shield the door closing signal sent to the actuator corresponding to the door body area or stop the door closing action of the corresponding actuator.

6. A construction elevator, characterized in that: include: The anti-pinch device for the cage door of a construction elevator as described in any one of claims 1 to 5.

7. The construction elevator according to claim 6, characterized in that: The cage of the construction elevator includes a first cage door located at a first exit side and a second cage door located at a second exit side.

8. The construction elevator according to claim 7, characterized in that: The first cage door is a single-door structure, and the second cage door is a double-door structure.

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