Lifting table capable of retreating when meeting resistance

Abstract

The invention belongs to the technical field of lifting tables, and discloses a lifting table capable of retreating when meeting resistance, which comprises a lifting upright post, a table board arranged above the lifting upright post and a main control unit for controlling the lifting upright post to lift, an anti-pinch detection device is arranged on the table board and comprises an infrared transmitter and an infrared receiver, the main control unit controls the infrared laser surface emitted by the infrared emitter along the radial direction to at least cover the whole table board, the infrared receiver receives infrared reflection laser reflected by an obstacle in a detection area, and the main control unit judges whether the obstacle exists in the detection area according to whetherthe infrared receiver receives a reflection signal or not. The detection area of the infrared receiver is the horizontal projection range of the whole table board on the infrared laser surface, the infrared laser surface emitted by the infrared emitter covers the whole table board, the planar light field coverage is more comprehensive, no gap exists, and the situation of missing detection is avoided.

Description

【Technical field】 [0001] The invention relates to the technical field of lift tables, in particular to a fallback lift table in case of resistance. 【Background technique】 [0002] During the operation of the lift table, it may touch the human body or objects, causing injury to the human body and crushing the object. At present, the motor current mutation or the collision sensor is used to realize the collision detection in the market, but the current mutation and the collision sensor both collide first and then act , if the sensitivity is too high, it is easy to make false alarms during the normal operation of the table, if the sensitivity is too low, slight collisions will not work, and the anti-collision effect is not good. [0003] At present, there are also infrared safety gratings on the market to realize non-contact collision detection. For example, in the invention patent document with the application publication number CN110250739A, an electric lift table control sys...

AI Technical Summary

Problems solved by technology

[0002] During the operation of the lift table, it may touch the human body or objects, causing injury to the human body and crushing the object. At present, the motor current mutation or the collision sensor is used to realize the collision detection in the market, but the current mutation and the collision sensor both collide first and then act , if the sensitivity is too high, it is easy to make false alarms during the normal operation of the table, if the sensitivity is too low, slight collision does not work, and the anti-collision effect is not good

[0003] At present, there are also infrared safety gratings on the market to realize non-contact collision detection. For example, in the invention patent document with the application publication number of CN110250739A, an electric lift table control system and method for realizing resistance retreat when encountering obstacles are disclosed. The control system includes a controller, a table, and a lifting column that drives the table to move vertically, and the lifting column is connected with the controller signal, and it also includes at least one set of safety gratings arranged under the table for detecting obstacles, Each set of safety gratings includes a transmitter assembly and a receiver assembly, and there is a gap between the safety grating and the lower surface of the table, and the safety grating is connected to the controller signal, and the safety grating is set to detect obstacles, so that when the collision Before reaching an obstacle, the safety light barrier can detect the obstacle, that is, the information can be fed back to the controller, and the controller can control the lifting column to stop or retreat, which can realize the retreat when encountering an obstacle, which can greatly reduce the collision between the table and the table. The possibility of detecting obstacles, but the infrared safety grating in this invention needs to be installed on the left and right sides, which is bulky and troublesome to install, and there are gaps between the gratings, there are many detection blind spots, and small obstacles cannot be detected

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