CN112912330B

CN112912330B - Anti-pinch safety device for elevator

Info

Publication number: CN112912330B
Application number: CN201980069682.2A
Authority: CN
Inventors: 尹一植
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-10-22
Filing date: 2019-09-25
Publication date: 2021-10-08
Anticipated expiration: 2039-09-25
Also published as: JP2021529711A; KR102060255B1; JP6969033B2; CN112912330A; WO2020085660A1

Abstract

The present invention relates to a safety device as follows: the structure is simple by using the magnet and the high frequency/ultrasonic wave switch, and the hands are prevented by warning the passenger by a warning lamp or a warning sound. A high frequency switch or an ultrasonic switch is used as a Switch (SW) which is arranged between the first magnets (50) and is connected with a controller (C) for controlling the operation of the elevator and the elevator door and is arranged on the supporting frame (40) in order to prevent the abnormal operation caused by the magnetic influence of the magnets.

Description

Anti-pinch safety device for elevator

Technical Field

The invention relates to an anti-pinch safety device of an elevator, in particular to the following safety device: the structure is simple by using the magnet and the high frequency/ultrasonic wave switch, and the hands are prevented by warning the passenger by a warning lamp or a warning sound.

Background

In order to smoothly open and close the elevator door D, there is a gap between the door D and the door frame 10, and in the case where a passenger waiting for the elevator places his or her hand on the door in order to get on the elevator, there is often an accident that the hand is caught in a gap between the door frame and the door without being aware of the opening of the door D and the hand is placed on the surface of the door, thereby being injured. In particular, children may experience many of these hand-pinching accidents due to lack of attention.

According to the statistical material published by 2016, 2, 19 and 10 days in the national security department of korea, 319 total accidents occurred during the last 10 years, and the number of casualties reached 365, and among them, the number of deaths reached 91. Among them, in the case of hand-pinching accidents, major accidents requiring treatment for 3 weeks or more occur every year, and the number of mild accidents hospitalized by korean consumers reaches 79 in 2013, 103 in 2014, and 92 in 2015. In order to prevent such accidents, the korean elevator law stipulates that the gap between the elevator door and the door frame is reduced from the previous 10mm to 5 mm.

In order to solve the problem, the applicant applies for an elevator anti-pinch safety device on the 3 rd and 28 th year 2017 and obtains the patent authorization of the patent 1732337.

Fig. 1 is a sectional view illustrating the above-described conventional invention.

The applicant's prior art invention shown in fig. 1 has a structure in which the switch is activated when the rotating frame is pushed inward by an external force, and the rotating frame returns to the original position by a spring when the external force disappears. However, in such a structure, it is difficult to make the revolving frame not to protrude outside the door frame 10, and there is a problem that the revolving frame protrudes outside the door frame as indicated by the broken line. As described above, if the rotating frame protrudes outward, the appearance is not good, and there is a concern that people or articles entering and exiting the elevator may get stuck.

Further, although the spring type switch is provided inside the rotating frame, in reality, it takes much time and effort to install such a spring in an embedded type.

In addition, the rotating frame and the spring type switch are in an open state, dust or foreign matters can easily enter the spring type switch, and the problem of abnormal operation of the switch is caused. As is well known, elevator doors are often opened and closed, and many passengers and goods come in and go out through the elevator doors. In such a case, a lot of foreign matter such as dust is generated, and therefore, it is a very big problem that such foreign matter enters the switch.

Disclosure of Invention

Technical problem

The present invention has been made in view of the above problems of the related art, and an object of the present invention is to prevent a rotating frame from protruding to the outside of a door frame, to simplify installation operations by providing a simple magnet instead of a spring type switch, to prevent foreign substances from entering the inside of a structure by adopting a closed type structure having a non-open type structure, and to prevent abnormal operation of the switch due to the magnetic force of the magnet.

Technical scheme

In order to achieve the above object, the present invention provides a hand-pinching prevention safety device, including: a fixed frame 20 having a cross-section of Contraband, which is provided between the door frame 10 of the elevator door and the hall door D of the elevator door, and is provided over the entire length of the step part of the door frame 10; a rotating frame 30 having a plate shape with a cross section in a shape of 'Contraband', and rotatably installed at one end of the fixed frame 20; a support frame 40 having an L-shaped cross-section extending from the sidewall 22 of the fixing frame 20; a stopper 42 formed by bending an end of the support frame 40 inward and protruding therefrom; a locking portion 32 for bending an end portion of the rotating frame 30 outward and abutting against the stopper portion 42; a plurality of first magnets 50 provided at the bottom wall 44 of the support frame 40 with a predetermined gap; a plurality of second magnets 52 provided on the inner surface of the revolving frame 30 and arranged at predetermined intervals so as to be in contact with the first magnets 50 with the same magnetic poles in a state where the revolving frame 30 is rotated inward; and a switch SW installed on the support frame 40 between the first magnets 50 and connected to a controller C for controlling the operation of the elevator and the door,

when the hand of the person is caught by the gap, the rotating frame 30 rotates to activate the switch SW to stop the operation of the elevator door D or control the opening and closing speed thereof, thereby preventing the hand of the person from entering the gap. When the external force acting on the rotating frame 30 disappears, the rotating frame 30 is rotated outward by the repulsive force of the same magnetic poles of the first magnet 50 and the second magnet 52, and in this case, the locking portion 32 of the rotating frame 30 is caught by the stopper portion 42 of the support frame, thereby preventing the rotating frame 30 from protruding outward of the doorframe 10. The intrusion of foreign matters into the inside is prevented by the airtight structure in which the support frame 40 is combined with the rotating frame 30;

a plurality of warning lamps 60 including light emitting diodes are provided on an outer side surface of the rotating frame 30, the warning lamps 60 are connected to a controller C, the warning lamps 60 are covered with a cover 70 made of a light-transmitting material, and when the rotating frame 30 is rotated inward, the controller C emits light to the warning lamps 60 to give a visual warning to passengers;

in order to prevent the abnormal operation caused by the influence of the magnetic force of the magnet, a high frequency switch or an ultrasonic switch is used as the switch SW.

ADVANTAGEOUS EFFECTS OF INVENTION

The safety device of the invention with the structure prevents the rotating frame from protruding to the outside of the door frame when no external force is acted at ordinary times so as not to obstruct passengers or goods from entering and exiting the elevator, and uses the magnet to replace a spring type switch, thereby compared with the prior safety device, not only simplifying the installation operation to a great extent, but also adopting a closed type structure to prevent foreign matters from entering the interior of the device instead of an open type structure, thereby prolonging the service life of the device and preventing the abnormal operation of the switch caused by the magnetic force of the magnet.

Drawings

Fig. 1 is a sectional view of an example of a conventional hand pinching prevention device.

Fig. 2 is a sectional view showing the structure of the present invention in a state where a passenger waits.

Fig. 3 is an enlarged sectional view of a key portion of fig. 2.

Fig. 4 is an isolated view of fig. 3.

Fig. 5 is a front view showing a state of arrangement of a conventional reed switch SW.

Fig. 6 is a front view showing a conventional reed switch SW provided on a support frame at an arbitrary position between a plurality of first magnets.

Fig. 7 is a sectional view showing the reed switch SW provided to the support frame.

Fig. 8 is a sectional view showing the structure of a conventional reed switch.

Fig. 9 is a sectional view showing the high frequency/ultrasonic wave switch SW of the present invention.

Fig. 10 is a front view showing that the high frequency/ultrasonic wave switch SW of the present invention is provided to the support frame in an arbitrary position between the plurality of first magnets.

Detailed Description

Fig. 2 is a sectional view showing a structure of the present invention, showing a state where a passenger waits, fig. 3 is an enlarged sectional view of an essential part, and fig. 4 is a separated view of fig. 3.

As shown in fig. 2 to 3, the safety device of the present invention is installed at a step portion of a doorframe 10 of an elevator door. That is, between the doorframe 10 and the hall door D of the elevator, the fixed frame 20 having a substantially Contraband-shaped cross section is provided over the entire length of the step portion of the doorframe 10. A fastening member such as a bolt or a nut is provided inside the fixing frame 20 so that the entire fixing frame 20 is fixed to the door frame 10.

A plate-shaped turning frame 30 having a substantially reverse-l-shaped cross section is rotatably provided at one end of the fixed frame 20, particularly, at one end of the side wall 22 of the fixed frame. Further, in the side wall 22 of the fixed frame 20, a support frame 40 having an "L" shaped cross section is integrally extended, and in order to contact a plurality of magnets described later, a bottom surface of the support frame 40 is preferably inclined with respect to the door frame 10.

In order to prevent the rotation frame 30 from protruding outward, the stopper 42 is bent inward and protrudes at the end of the support frame 40, and the locking portion 32 abutting against the stopper 42 is bent outward and protrudes at the end of the rotation frame 30.

A plurality of first magnets 50 are provided at a predetermined gap on the inclined bottom wall 44 of the support frame 40. The spacing between these first magnets 50 can be adjusted as desired. Second magnets 52 are provided on the inner surface of the revolving frame 30 at positions corresponding to the first magnets 50, and the first magnets 50 and the second magnets 52 are arranged so that the same magnetic poles thereof are in contact with each other in a state where the revolving frame 30 is rotated inward.

Among the plurality of first magnets 50, one or more switches SW are disposed on the support frame 40 and connected to the controller C, and when the rotating frame 30 is rotated inward, the switches SW are activated, and the controller C stops the operation of the hoistway door D or controls the opening/closing speed thereof, thereby controlling the operation of the elevator and the door. The switch may be a spring-activated switch that is activated by pressure, or a magnetic reed switch that is energized by a magnetic circuit formed by the proximity of a magnet. In the case of the reed switch, a magnet is provided at a corresponding portion of the rotating frame 30 (see fig. 6).

In the present invention having the above-described configuration, if a hand of a person is caught by the gap between the door frame and the door, the switch SW is activated to stop the operation of the hall door D or control the opening and closing speed thereof in the process of rotating the rotating frame 30 to the inside, thereby preventing the hand of the person from entering the gap, and if the external force acting on the rotating frame 30 disappears, the rotating frame 30 is rotated to the outside by the repulsive force of the same magnetic poles of the first magnet 50 and the second magnet 52, and in this case, the locking portion 32 of the rotating frame 30 is caught by the stopper portion 42 of the support frame, thereby preventing the rotating frame 30 from protruding to the outside of the door frame 10.

As shown in fig. 4, a hole 26 for inserting the fastener 3 is formed in the bottom of the fixing frame 20, and the hole 26 is preferably formed in a long hole shape formed in a direction perpendicular to the elevator door D. In this case, when the fastener 3 is inserted into the long hole 26 and tightened to the doorframe 10, the distance between the doorframe and the elevator door can be adjusted by moving the fixing frame 20 (seen from the top in the drawing) through the long hole 26. Of course, it is preferable that the opening portion of the fixing frame 20 is covered with the closing lid portion 5.

Also, the present invention may use an additional switch SW.

Fig. 5 is a front view showing a configuration state of the switch SW described above. As shown in the drawing, one switch SW is disposed on each of the left and right sides of the elevator, and the switch is connected to the controller C, and the controller C may be connected to a speaker SP provided in the elevator or in the vicinity of the elevator, as necessary. The figure shows that the switch SW is provided only in the left side portion, but the same switch SW is also provided on the right side.

The switch SW may be provided to the support frame 40 at any position between the plurality of first magnets 50. Fig. 6 is a front view showing such a relationship, and fig. 7 shows the switch SW provided to the support frame 40.

As shown in fig. 7, if the rotating frame 30 is rotated inward, the switch SW is activated, so that the operation of the hall doors D can be controlled by the controller C.

As shown in fig. 3 to 4, a plurality of warning lamps 60 including Light Emitting Diodes (LEDs) may be disposed on the outer surface of the rotating frame 30. The warning lamp 60 is connected to the controller C and is protected by being covered with a cover 70 made of a translucent material. When the rotating frame 30 is rotated inward, the warning lamp 60 is illuminated by the controller C to give a visual warning to the passenger, thereby effectively preventing the human hand from being caught by the gap.

The controller C is connected to a speaker SP provided in the elevator, and when the revolving frame 30 is rotated inward, the controller C can cause the speaker SP to emit a warning sound by the activation of the reed switch or the activation of the switch SW based on the proximity of the plurality of magnets. The warning sounds may be emitted simultaneously with or separately from the visual warning based on the warning lamp.

As shown in fig. 5, if a situation occurs in which a hand is pinched by a gap, a visual warning may be given to the passenger by the warning lamp 60, for example, the warning lamp may emit red light. The light emitting color of the warning lamp is controlled by the controller, so that the warning lamp can show various functions such as white indicating the opening and closing of a door, green indicating the arrival of an elevator and the like.

On the other hand, as shown in fig. 6, when a reed switch is used, which is energized by forming a magnetic path by the approach of a magnet, there is a possibility that a problem arises. As shown in detail in fig. 8, if the magnet 50 is provided near the door frame 10 formed of metal, the magnetic force of the magnet may affect the metal nearby, thereby possibly causing the reed switch to operate abnormally.

Fig. 9 shows a cross-sectional view of an embodiment utilizing a switch SW that utilizes high frequency or ultrasonic waves in order to prevent the above-described problems. As shown in the drawings, if a high frequency switch or an ultrasonic wave switch is used as the switch SW connected to the controller, since reflection of the high frequency or the ultrasonic wave is used, an operation interval of the switch SW capable of operating the controller can be set as needed by moving the rotating frame 30, and thus, a problem of abnormal operation due to magnetic force does not occur, and smooth operation of the anti-pinch device of the present invention can be ensured.

Fig. 10 is a front view showing an embodiment of the present invention using the high frequency/ultrasonic wave switch SW corresponding to fig. 6, showing a state in which the high frequency/ultrasonic wave switch SW of the present invention is disposed on the support frame at an arbitrary position between the plurality of first magnets.

Claims

1. A pinch resistant safety device comprising:

a fixed frame (20) with Contraband-shaped section, which is arranged between the door frame (10) of the elevator door and the landing door (D) of the elevator, and is arranged on the whole length of the step part of the door frame (10);

a plate-shaped rotating frame (30) having a cross-section of Contraband and rotatably installed at one end of the fixed frame (20);

a support frame (40) having an L-shaped cross section and formed by extending from the side wall (22) of the fixing frame (20);

a stopper (42) formed by bending an end of the support frame (40) inward and protruding;

a locking part (32) for bending the end of the rotating frame (30) outward and abutting against the stopper part (42);

a plurality of first magnets (50) provided at the bottom wall (44) of the support frame (40) with a predetermined gap;

a plurality of second magnets (52) which are provided on the inner surface of the rotating frame (30) and are arranged at predetermined intervals so as to be in contact with the first magnets (50) with the same magnetic poles in a state where the rotating frame (30) is rotated inward; and

a Switch (SW) disposed between the first magnets (50) and the support frame (40) and connected with a controller (C) for controlling the operation of the elevator and the door,

the anti-pinch safety device is characterized in that,

if the hand of the person is caught by the gap between the door frame (10) of the elevator door and the hall door (D) of the elevator, the rotating frame (30) rotates to activate the Switch (SW) to stop the operation of the elevator door (D) or control the opening and closing speed thereof, thereby preventing the hand of the person from entering the gap between the door frame (10) of the elevator door and the hall door (D) of the elevator,

when the external force acting on the rotating frame (30) disappears, the rotating frame (30) rotates to the outside by the repulsive force of the same magnetic pole of the first magnet (50) and the second magnet (52), in this case, the locking part (32) of the rotating frame (30) is locked at the stopper part (42) of the supporting frame, thereby preventing the rotating frame (30) from protruding to the outside of the door frame (10),

the invasion of foreign matters into the interior is prevented through a closed structure formed by combining the supporting frame (40) and the rotating frame (30);

a plurality of warning lamps (60) including light emitting diodes are provided on an outer side surface of the rotating frame (30), the warning lamps (60) are connected to a controller (C), the warning lamps (60) are covered with a cover (70) made of a light-transmitting material, and when the rotating frame (30) rotates inward, the warning lamps (60) are illuminated by the controller (C), thereby giving a visual warning to passengers;

in order to prevent the abnormal operation caused by the magnetic force of the magnet, a high frequency switch or an ultrasonic switch is used as the Switch (SW).