CN112568594A - Lifting table capable of returning when encountering resistance - Google Patents

Abstract

The invention discloses a lifting table capable of returning when encountering a resistance, belonging to the technical field of lifting tables and comprising a lifting upright post, the table is arranged above the lifting stand column, the main control unit is used for controlling the lifting stand column to lift, the table is provided with an anti-pinch detection device, the anti-pinch detection device comprises an infrared transmitter and an infrared receiver, the main control unit controls the infrared transmitter to at least cover the whole table along an infrared laser surface emitted along the radial direction, the infrared receiver receives infrared reflection laser reflected by obstacles in a detection area, the main control unit judges whether the detection area has the obstacles or not according to whether the infrared receiver receives a reflection signal, the detection area of the infrared receiver is the horizontal projection range of the whole table on the infrared laser surface, the infrared laser surface emitted by the infrared transmitter covers the whole table, a plane light field is more comprehensively covered, no gap exists, and the condition of missed detection is avoided.

Description

Lifting table capable of returning when encountering resistance

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of lifting tables, in particular to a lifting table capable of returning when encountering resistance.

[ background of the invention ]

The lifting table is likely to touch a human body or an object in the operation process, so that the human body is injured, the object is crushed, the collision detection is realized by utilizing the motor current mutation or the collision sensor in the current market, but the current mutation and the collision sensor collide firstly and then act, if the sensitivity is too high, the error report is easily carried out in the normal operation process of the table, if the sensitivity is too low, the slight collision does not work, and the anti-collision effect is not good.

There are also infrared correlation safety gratings in the market to realize non-contact collision detection, for example, in the invention patent document with application publication No. CN110250739A, an electric lifting table control system and method for realizing retraction under a resistance is disclosed, the electric lifting table control system includes a controller, a table and a lifting column driving the table to move vertically, the lifting column is in signal connection with the controller, the electric lifting table further includes at least one set of safety gratings disposed under the table for detecting an obstacle, each set of safety gratings includes a transmitting end component and a receiving end component, a gap is disposed between the safety grating and the lower surface of the table, the safety grating is in signal connection with the controller, the safety grating is disposed to detect the obstacle, so that before the obstacle is touched, the safety grating can detect the obstacle, i.e. information can be fed back to the controller, the controller can control the lifting column to stop or retract, therefore, the infrared correlation safety grating can be retracted when meeting a resistance, the possibility that the table and the table meet an obstacle can be greatly reduced, the infrared correlation safety grating needs to be installed on the left side and the right side, the size is large, the installation is troublesome, gaps exist among the gratings, more detection dead zones exist, and the obstacle with small size cannot be detected.

[ summary of the invention ]

The invention aims to solve the technical problem of overcoming the defects in the prior art and design a lift table capable of retreating when encountering a resistance, which can detect obstacles more comprehensively and has higher accuracy.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a meet and hinder lift table that rolls back, includes the lift stand, establishes the table above the lift stand and controls the main control unit that the lift stand goes up and down, be equipped with on the table and prevent pressing from both sides detection device, prevent pressing from both sides detection device and include infrared emitter and infrared receiver, main control unit control infrared emitter covers whole table at least along the infrared laser face of radial transmission, infrared receiver receives the infrared reflection laser of the barrier reflection in the detection area, main control unit basis whether infrared receiver receives reflected signal and judges whether detection area has the barrier, infrared receiver's detection area is the horizontal projection scope of whole table on infrared laser face.

The beneficial effect of this scheme of adoption:

1. aiming at the problems that in the prior art, a gap exists between infrared correlation safety gratings, and a barrier with a small size cannot be detected, an infrared emitter adopted in the invention emits an infrared laser surface to form a planar light field, when the lifting upright column drives the table plate to descend, the barrier falls into a detection area and reflects infrared laser, the reflected infrared laser is detected by an infrared receiver and generates a resistance detection signal to be sent to a main control unit, and the main control unit controls the lifting upright column to stop descending or back to ascend according to the received resistance detection signal so as to achieve the purpose of preventing clamping.

2. Infrared receiver's detection area is whole table horizontal projection on the infrared laser face, and the barrier just can be detected when only falling into the detection area, promptly, lies in the table below and has the barrier that presss from both sides the risk of hindering just can be considered to invade the object, and the object beyond the table can not detected, reduces the wrong report rate, can satisfy the sensitivity and the accuracy that the barrier detected simultaneously, prevents that the clamp effect is better.

3. The anti-pinch detection device is simple in structure, convenient to install, small in size, installation space-saving, cost-saving, and relatively flexible in installation positions of the infrared transmitter and the infrared receiver, the infrared transmitter and the infrared receiver can be installed through the same fixing device, the infrared receiver is located right below or right above the infrared transmitter, the infrared transmitter and the infrared receiver can also not be installed on the same fixing device, and the anti-pinch detection device is higher in practicability as long as the anti-pinch detection purpose can be achieved.

4. According to the anti-pinch detection device, the infrared laser surface emitted by the infrared emitter has a certain distance with the table top, so that the anti-pinch detection device can detect the obstacle before the table top touches the obstacle, and sends a resistance detection signal to the main control unit, so that the main control unit sends a command in advance to control the lifting upright post to stop or return, the possibility that the table top touches the obstacle is reduced, and the safety and the reliability of the lifting table in the operation process are further improved.

Preferably, the anti-pinch detection device further comprises a mounting frame for mounting the infrared emitter and the infrared receiver.

Preferably, the mounting frame is located in the middle of the table plate.

Preferably, at least one infrared emitter is arranged on the mounting frame, the at least one infrared emitter is uniformly distributed along the circumference, and the sum of the emission angles of the at least one infrared emitter is approximately equal to 360 degrees.

Preferably, the table is a square table, and the mounting frame is located at a corner of the table.

Preferably, at least one infrared emitter is arranged on the mounting frame, and the sum of emission angles of the at least one infrared emitter is approximately equal to 90 degrees.

Preferably, infrared receiver includes the camera, the camera is wide angle lens or fisheye lens, the detection area of camera is the horizontal projection scope of whole table on infrared laser face.

Preferably, the anti-pinch detection device is provided with a collision sensor.

Preferably, the lifting stand column meets an obstacle in the descending process, and the main control unit performs anti-pinch control on the lifting stand column according to a resistance detection signal sent by the infrared receiver.

Preferably, the infrared emitter comprises an infrared in-line laser.

These features and advantages of the invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The invention is further described with reference to the accompanying drawings in which:

fig. 1 is a schematic view of a three-dimensional structure of a lifting table capable of retracting when encountering a resistance.

Fig. 2 is a schematic view illustrating the anti-pinch detection device installed on the bottom surface of the desk board according to the embodiment of the present invention.

Fig. 3 is a schematic view of the anti-pinch detection device installed on the bottom surface of the desk board according to the second embodiment of the present invention.

Reference numerals: lifting the upright column 001; a table board 002; an anti-pinch detection device 003; an infrared emitter 1; an infrared receiver 2; a mounting frame 3; an obstacle 004; a planar light field a; a detection area b; infrared laser c; the emission angle alpha.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a higher level than the second feature.

The first embodiment is as follows:

as shown in fig. 1-2, a meet and hinder lift table that backs down, including lift stand 001, establish the table 002 and the main control unit that control lift stand 001 goes up and down above lift stand 001, be equipped with on the table 002 and prevent pressing from both sides detection device 003, prevent pressing from both sides detection device 003 including infrared emitter 1 and infrared receiver 2, main control unit control infrared emitter 1 covers whole table 002 along the infrared laser face of radial transmission at least, infrared receiver 2 receives the infrared reflection laser of the barrier 004 reflection in the detection area b, whether main control unit receives reflection signal according to infrared receiver 2 and judges that detection area b has the barrier, infrared receiver 2's detection area b is the horizontal projection of whole table 002 on infrared laser face.

Aiming at the problems that a gap exists between infrared correlation safety gratings and a small-size barrier 004 cannot be detected in the prior art, an infrared emitter 1 used in the invention emits an infrared laser surface to form a planar light field a, when the lifting upright column 001 drives the table board 002 to descend and the barrier 004 exists, the barrier 004 falls into a detection area b and reflects infrared laser c, the reflected infrared laser c is detected by an infrared receiver 2 and generates a resistance detection signal to be sent to a main control unit, and the main control unit controls the lifting upright column 001 to stop descending or back ascending according to the received resistance detection signal so as to achieve the anti-pinch purpose. The detection area b of infrared receiver 2 is the horizontal projection of whole table 002 on infrared laser face, and barrier 004 only can be detected when falling into detection area b, promptly, is located that there is the barrier 004 of pressing from both sides the risk of hindering in table 002 below and just can be considered to invade the object, and the object beyond table 002 can not be detected, reduces the wrong report rate, can satisfy sensitivity and the accuracy that barrier 004 detected simultaneously, and it is better to prevent pressing from both sides the effect. The anti-pinch detection device 003 has the advantages of simple structure, convenience in installation, small volume, installation space saving and cost saving, the infrared transmitter 1 and the infrared receiver 2 are flexibly installed, the infrared transmitter 1 and the infrared receiver 2 can be installed through the same fixing device, the infrared receiver 2 is positioned under or over the infrared transmitter 1, the infrared transmitter 1 and the infrared receiver 2 can not be installed on the same fixing device, and the anti-pinch detection device is higher in practicability as long as the anti-pinch detection purpose can be realized. According to the invention, the infrared laser surface emitted by the infrared emitter 1 has a certain distance with the table board 002, so that the anti-pinch detection device 003 can detect the obstacle 004 before the table board 002 touches the obstacle 004, and sends a blockage detection signal to the main control unit, so that the main control unit sends a command in advance to control the lifting upright column 001 to stop or return, the possibility that the table board 002 touches the obstacle 004 is reduced, and the safety and reliability of the lifting table in the operation process are further improved.

In order to judge whether the detected object is an obstacle 004 or not, if the lifting upright 001 encounters an external obstacle 004 in the descending process, the main control unit performs anti-pinch control on the lifting upright 001 according to a resistance detection signal sent by the infrared receiver 2, although the lifting upright 001 is fixed below a desktop and used as a desk leg, the part irradiated by an infrared laser surface can reflect infrared laser c, but the position of the lifting upright is fixed, and the infrared receiver can identify that the lifting upright is a desk leg during later-stage image processing, so that the anti-pinch control of the lifting upright 001 by the main control unit can not be caused.

In order to realize the planar infrared laser c emission, the infrared emitter 1 in this embodiment selects an infrared linear laser, the infrared receiver 2 preferably selects a camera, the camera is a wide-angle lens or a fisheye lens, the camera is coated with a film to filter visible light, and the detection area b of the camera is the horizontal projection of the whole table 002 on the infrared laser surface.

The camera has the photosensitivity to infrared laser c, and the infrared laser face forms photosensitive zone (being detection area b) in its visual angle scope, and in this embodiment, the image processing in camera later stage only processes the horizontal projection scope of whole table 002 on the infrared laser face, and image processing is prior art, and no longer gives details here.

Of course, in other embodiments, the infrared transmitter 1 is not limited to the infrared in-line laser, and may be other lasers, and the infrared receiver 2 is not limited to the camera, as long as the above functions are achieved, and all of them fall within the scope of the present invention.

In order to simplify the structure, improve and prevent pressing from both sides detection device 003's integrated level, prevent pressing from both sides detection device 003 still including installation infra-red transmitter 1 and infrared receiver 2's mounting bracket 3, the installation of infra-red transmitter 1 and infrared receiver 2 has been realized simultaneously through a mounting bracket 3, save the installation material, it is little to occupy space after the installation, infrared receiver 2 is located infra-red transmitter 1 directly over or under, be more convenient for adjust infrared receiver 2's angle, make its detection area b's definite more accurate, in order to reach best detection state.

Prevent pressing from both sides detection device 003 itself also can touch the object, in order to prevent that it from becoming to detect the blind area, prevent pressing from both sides and be equipped with collision sensor on the detection device 003.

In the in-service use in-process, the plane light field a part that the infrared laser face that infrared emitter 1 launched formed can be blocked by lift stand 001, forms and detects the blind area, can be on the desk different positions install two and above prevent pressing from both sides detection device 003 in order to avoid detecting the blind area.

In this embodiment, the mounting bracket 3 is located in the middle of the table 002, in order to realize the detection of the obstacle 004 in the whole detection area b, the infrared emitter 1 needs to form a planar light field a in the whole circumferential range, in order to realize the purpose, at least one infrared emitter 1 is arranged on the mounting bracket 3, the at least one infrared emitter 1 is uniformly distributed along the circumference, and the sum of the emission angles of the at least one infrared emitter is greater than or equal to 360 degrees, so as to form circumferential omnibearing detection.

Example two:

as shown in fig. 3, the difference between the first embodiment and the second embodiment is that when the table 002 is the square table 002, the mounting frame 3 is located at a corner of the table 002, at this time, at least one infrared emitter 1 is arranged on the mounting frame 3, the sum of the emission angles of the at least one infrared emitter is greater than or equal to 90 degrees, and the detection of the whole table 002 can be realized by using fewer infrared emitters 1, so as to further reduce the cost.

While the foregoing is directed to embodiments of the present invention, the scope of the invention should not be limited thereby, and it will be apparent to those skilled in the art that the invention includes, but is not limited to, those illustrated in the drawings and described in the foregoing detailed description. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.

Claims (10)

1. The utility model provides a meet and hinder lift table that rolls back, includes the lift stand, establishes the table above the lift stand and controls the main control unit that the lift stand goes up and down, a serial communication port, be equipped with on the table and prevent pressing from both sides detection device, prevent pressing from both sides detection device and include infrared emitter and infrared receiver, the main control unit control infrared emitter covers whole table along the infrared laser face of radial transmission at least, infrared receiver receives the infrared reflection laser of the barrier reflection in the detection area, the main control unit basis whether infrared receiver receives reflection signal and judges whether detection area has the barrier, infrared receiver's detection area is the horizontal projection scope of whole table on infrared laser face.

2. A chance stop retraction lifting table as claimed in claim 1 wherein the anti-pinch detection means further comprises a mounting bracket to which the infrared emitter and infrared receiver are mounted.

3. A chance stop retraction lifting table according to claim 2 wherein the mounting bracket is located in the middle of the table.

4. A chance stop retraction lifting table as claimed in claim 3, wherein the mounting frame is provided with at least one infrared emitter, the at least one infrared emitter is uniformly distributed along the circumference, and the sum of the emission angles of the at least one infrared emitter is greater than or equal to 360 degrees.

5. A chance stop retracting lifting table according to claim 2 wherein the table is a square table and the mounting bracket is located at a corner of the table.

6. A chance stop retraction lifting table as claimed in claim 5, wherein the mounting frame is provided with at least one infrared emitter, and the sum of the emission angles of the at least one infrared emitter is greater than or equal to 90 degrees.

7. A resistance-encountering retraction lifting table according to claim 2, wherein the infrared receiver comprises a camera, the camera is a wide-angle lens or a fisheye lens, and a detection area of the camera is a horizontal projection range of the whole table plate on the infrared laser plane.

8. A retraction lifting table according to claim 1, wherein the anti-pinch detection device is provided with a collision sensor.

9. A retraction lifting table according to claim 1, wherein the lifting column meets an obstacle during the descending process, and the main control unit performs anti-pinch control on the lifting column according to the detection signal of the infrared receiver.

10. A chance stop-back elevator table as in claim 1, wherein the infrared emitter comprises an infrared in-line laser.

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