WO2010064757A1

WO2010064757A1 - Apparatus for opening and shutting of electric rail car doorway

Info

Publication number: WO2010064757A1
Application number: PCT/KR2008/007567
Authority: WO
Inventors: Kwang-Sun Baik; Weon-Kyong Kim; Joon-Hyoung Lyu; Chang-Sung Jeon
Original assignee: Korea Railroad Research Institute
Priority date: 2008-12-02
Filing date: 2008-12-22
Publication date: 2010-06-10
Also published as: KR101007187B1; CN102239074A; CN102239074B; KR20100062561A

Abstract

An apparatus for opening and closing the door of an electric rail vehicle is provided. The apparatus includes moving units, fastening means, and solenoid units. The moving units are configured to laterally move in the direction in which left and right doors are opened or closed. The fastening means are fastened to the left and right doors. The solenoid units are fastened to respective first sides of the moving units, and are configured so as to vertically move the left and right door along the fastening means in response to a door operation signal.

Description

[DESCRIPTION]

[invention Title]

APPARATUS FOR OPENING AND SHUTTING OF ELECTRIC RAIL CAR DOORWAY

[Technical Field]

The present invention relates to an apparatus for opening and closing the door of an electric rail vehicle and, more particularly, to an apparatus for opening and closing the door of an electric rail vehicle, which enables left and right doors to be laterally opened and closed in the state in which the left and right doors are lifted so as to be spaced apart from the floor of the vehicle by a predetermined distance using solenoids, thus uninterruptedly opening and closing the door of the electric rail vehicle even when a foreign body exists between the left and right doors and a slide rail.

[Background Art]

Generally, an apparatus for detecting whether the door of an electric rail vehicle has been opened or closed is mechanically fastened to the door of the electric rail vehicle or to the electric rail vehicle itself. When the opening or closing operation of the door of the electric rail vehicle is performed, whether the door has been opened or closed is detected by a mechanically-coupled structure.

As examples of methods of driving the door of such an electric rail vehicle, there are a pneumatic driving method and an electric driving method. In the past, the pneumatic driving method was chiefly used. However, in recent years, the trend has been toward using the electric driving method. In the above-described electric driving method, when the door of an electric rail vehicle is operated, a door controller transmits a motor drive command to a motor, thus opening or closing the door by driving a spindle and an actuator using the rotary power of the motor. To this end, main components, such as a motor, a door controller, a spindle, a roller, a rail and limit switches, are required.

FIG. 1 is a view showing the construction of a conventional electric driving apparatus for the door of an electric rail vehicle.

Referring to FIG. 1, the conventional electric driving apparatus for the door of an electric rail vehicle includes doors 1, a motor 6, a ball screw shaft 4 which is connected to the rotational shaft of the motor 6 and is integrated with a left-handed screw 2 and a right-handed screw 3 which both have the same leads, ball nuts 8 which are configured so as to move along the ball screw shaft 4 and are connected with the respective doors 1, limit switches 5 which are attached to the respective side ends of the ball nuts 8 and are configured such that the doors 1 are locked when it is detected that the doors 1 have reached a completely-closed position, a slide rail 7 which is connected to the upper or lower portions of the doors 1 and is mounted to electrically move the doors, and a door controller 9 which is provided with a door opening and closing circuit so as to control the rotation of the motor 6 in response to a door operation signal and determine whether the doors must be opened or closed by detecting whether an obstacle has been caught between the left and right doors from the value of current that flows to the motor 6.

In addition, the conventional electric driving apparatus for the door of an electric rail vehicle further includes a position extracting means, an unlocking handle, and a micro switch. The position extracting means functions to detect the position at which the doors are completely open, unlocking positions, and deceleration positions at which decelerations are made when the door are being opened or closed. In the conventional electric-type driving apparatus for the door of an electric rail vehicle, which is constructed as described above, an engineer or a conductor, who is located in the operation room of the electric rail vehicle, operates the doors 1 at each station at which the vehicle stops, using a vehicle monitor or an automatic train operation apparatus. When a door operation signal is transmitted from the operation room of the electric rail vehicle or the automatic train operation apparatus to the door controller 9, the door controller 9 drives the motor 6.

Subsequently, when the ball screw shaft 4, which is directly connected to the shaft of the motor 6, rotates at the same rotational speed as that of the motor 6, the ball nuts 8 move, thereby causing the doors 1 to move. In this case, because the slide rail 7 is mounted to the upper or lower portions of the doors 1 of the electric rail vehicle, the doors 1 can be uninterruptedly operated.

However, in the conventional electric driving apparatus for the door of an electric rail vehicle, small wheels are mounted on the lower surfaces of the doors 1, so that the gap between the doors 1 and the floor of the vehicle is narrow. Accordingly, when a foreign body is caught between the slide rail 7 and the doors 1, the motor 6 must generate more force in order to operate the doors 1.

In the case where the strength of the foreign body is stronger than the torque that is generated by the motor 6, a greatly increased amount of current flows to the motor 6, and thus the motor 6 may be damaged. Accordingly, in order to protect the motor 6, the micro switch, which functions to limit current, is operated. In this case, a necessary torque cannot be generated even though a great amount of force is necessary to operate the door. As a result, the operation of the doors 1 is hindered while the doors 1 are being opened or closed.

In order to operate the doors again, the engineer, who is located in the operation room, causes a door operation signal to be transmitted several times. Accordingly, if the doors are not operated even though several repeated attempts are made to operate the doors, there are problems in that passengers may be inconvenienced by being made to get out of the vehicle in order to ensure their safety, and in that the passengers' safety may be threatened.

[Disclosure] [Technical Problem] Accordingly, an object of the present invention is to provide an apparatus for opening and closing the door of an electric rail vehicle, which enables left and right doors to be laterally opened and closed in the state in which the left and right doors are lifted so as to be spaced apart from the floor of the vehicle by a predetermined distance using solenoids, thus uninterruptedly opening and closing the door of the electric rail vehicle even when a foreign body exists between the left and right doors and a slide rail.

Another object of the present invention is to provide an apparatus for opening and closing the door of an electric rail vehicle, which can enhance passengers' safety and convenience by improving the operational reliability of the door of the electric rail vehicle.

[Technical Solution]

In order to accomplish the above objects, the present invention provides an apparatus for opening and closing the door of an electric rail vehicle, including: moving units configured to laterally move in the direction in which left and right doors are opened or closed; fastening means fastened to the left and right doors; and solenoid units fastened to respective first sides of the moving units, and configured so as to vertically move the left and right door along the fastening means in response to a door operation signal.

Furthermore, each of the solenoid units includes a solenoid which is configured to generate a magnetic field when supplied with current, and a moving block.

Furthermore, each of the fastening means includes a fastening plate which is mounted to a corresponding door, and a fastening shaft which is configured such that one end thereof is fastened to the fastening plate and such that the remaining end thereof is inserted into a corresponding solenoid unit .

Furthermore, a through-hole is formed such that a fastening shaft passes through the central portion of each of the solenoid units. The moving block is fastened to the fastening shaft inserted into the through-hole. A cylindrical iron core is fastened to the inner surface of the upper portion of the solenoid unit so as to be spaced apart from the moving block by a predetermined distance.

Furthermore, a first spring member is mounted on the fastening shaft between the lower end of the corresponding solenoid unit and the fastening plate. Furthermore, a second spring member is mounted on the fastening shaft between the upper end of the corresponding solenoid unit and a corresponding support.

Furthermore, the fastening shaft is made of nonmagnetic material.

[Advantageous Effects]

According to the present invention, in the apparatus for opening and closing the door of an electric rail vehicle, the left and right doors are laterally opened and closed in the state in which the left and right doors are lifted so as to be spaced apart from the floor of the vehicle by a predetermined distance using solenoids, so that the door can be uninterruptedly opened or closed even when a foreign body exists between the left and right doors and a slide rail.

Furthermore, according to the present invention, in the apparatus for opening and closing the door of an electric rail vehicle, the possibility of the operation of the doors being hindered during the opening or closing operation of the doors due to a foreign body that is inserted into the slide rail is remarkably reduced, so that the operational reliability of the door of the electric rail vehicle can be improved. Furthermore, the passengers' inconvenience resulting from the passengers being made to get out of the vehicle due to the failure of the proper operation of the doors is reduced, so that the passengers' safety can be further enhanced.

[Description of Drawings] FIG. 1 is a view showing the construction of a conventional electric driving apparatus for the door of an electric rail vehicle;

FIG. 2 is a view showing the construction of an apparatus for opening and closing the door of an electric rail vehicle, according to an embodiment of the present invention;

FIG. 3 is a sectional view showing, in detail, the construction of a solenoid unit according to an embodiment of the present invention; and FIG. 4 is a view schematically showing the entire construction of the apparatus for opening and closing the door of an electric rail vehicle, according to the embodiment of the present invention.

[Best Mode] The present invention may be modified in the various ways, and may have various embodiments. Thus, specific embodiments will be illustrated in drawings and be described in detail in the present specification. However, these specific embodiments are not intended to limit the present invention, and it should be understood that modifications, equivalents and substitutions are all included in the spirit and scope of the present invention. The same reference numerals are used throughout the different drawings to designate the same or similar components.

A preferred embodiment of the present invention is described in detail with reference to the accompanying drawings below. FIG. 2 is a view showing the construction of an apparatus for opening and closing the door of an electric rail vehicle, according to an embodiment of the present invention, FIG. 3 is a sectional view showing, in detail, the construction of a solenoid unit according to an embodiment of the present invention, and FIG. 4 is a view schematically showing the entire construction of the apparatus for opening and closing the door of an electric rail vehicle, according to the embodiment of the present invention. Referring to FIGS. 2 to 4, the apparatus for opening and closing the door of an electric rail vehicle according to the present embodiment includes moving units 15 which are mounted to a screw shaft 4a connected to the rotational shaft of a motor 6a so as to be laterally moved in the direction in which the doors 1 are opened or closed, fastening means 10 which are fastened to the doors 1, and solenoid units 11 which are fastened to respective first sides of the moving units 15 and are configured to vertically move the doors 1 along the fastening means 10 in response to a door operation signal.

Each fastening means 10 includes a fastening plate 12, which is mounted on a corresponding door, and a non-magnetic fastening shaft 13, which is configured such that one end thereof is fastened to the fastening plate 12 and such that the other end thereof is inserted into a corresponding solenoid unit 11.

The fastening shafts 13 are designed to have a height greater than the screw shaft 4a by a predetermined length. This is to smoothly raise and lower the doors 1 along the fastening shaft 13.

Furthermore, as shown in FIG. 3, each of the solenoid units 11 is provided with a through-hole 16, which is formed such that a corresponding fastening shaft 13 is inserted so as to pass through the central portion thereof. A cylindrical moving block 13' is fastened to the corresponding fastening shaft 13 in the through-hole 16.

In this case, the moving block 13' is made of magnetic material. A cylindrical iron core 17a is fastened to the inner surface of the upper portion of the corresponding solenoid unit 11 so as to be spaced apart from the moving block 13' by a predetermined distance .

Meanwhile, a first spring member 14 is mounted on the corresponding fastening shaft 13 between the lower end of the corresponding solenoid unit 11 and a corresponding fastening plate 12.

Accordingly, when current is supplied to the solenoid units 11, the moving blocks 13' are attached to the respective cylindrical iron cores 17a due to the magnetic force that is generated by the solenoids 17, and thus the fastening shafts 13 can be raised upwards .

When the fastening shafts 13 are raised upwards by the operation of the solenoids 17 as described above, the doors 1 attached to the fastening plates 12 are vertically lifted. Accordingly, the doors 1 of the electric rail vehicle become spaced part from the floor of the vehicle. In this case, the screw shaft 4a is rotated in response to the rotation of the motor 6a, and thus the moving units 15 mounted to the screw shaft 4a are horizontally moved along the screw shaft 4a.

In this case, guide bars 18 are additionally formed on respective second sides of the moving units 15 supported to the screw shaft 4a, and are supported by pockets (not shown) that are located above the doors 1, thus preventing the doors 1 from being inclined by enabling the moving units 15 to be rotated around the screw shaft 4a. When the doors 1 are moved to their predetermined positions, that is, to completely- opened positions or completely-closed positions, and thus limit switches (not shown) are operated, the rotation of the motor βa is stopped and the supply of electricity to the solenoids 17 is interrupted, and thus the solenoid units 11 are lowered along the respective fastening shafts 13 due to the loss of magnetic force.

When the fastening shafts 13 are lowered as described above, the doors 1 are lowered to their original positions, that is, to the floor of the electric rail vehicle. In this case, the impact that may be generated when the doors 1 are lowered can be absorbed by second spring members 14' supported by supports 19.

Meanwhile, as shown in FlG. 4, in the apparatus for opening and closing the door of an electric rail vehicle according to the embodiment of the present invention, two fastening means 10 are mounted on the upper end of the left door, and two separate fastening means 10 are mounted on the right door. Furthermore, in the present embodiment, the moving units 15 and the solenoid units 11 are provided so as to correspond to the number of fastening means 10. Alternatively, based on various installation methods, two fastening means 10 may be connected to a single moving unit 15 using connection shafts.

When the opening or closing operation of the door is performed, the left and left doors are lifted so as to be spaced apart from the floor of the vehicle by a predetermined distance due to magnetic fields that are generated by the solenoids 17. In this state, the left and right doors are moved. In this case, if the balance of the doors 1 is lost, problems may occur in that parts of the lower ends of the door collide with the slide rail while the doors are being moved, and in that the doors are jerked.

Accordingly, when two fastening means 10 are mounted to each of the left and right doors 1, the balance of the left and right doors is maintained. As a result, when the opening or closing operation of the doors is performed, the lower ends of the door are prevented from colliding with the slide rail, and thus the door can be smoothly moved.

The operation of the apparatus for opening and closing the door of an electric rail vehicle according to the embodiment of the present invention is described in detail with reference to the accompanying drawings below.

An engineer or a conductor who is located in the operation room of the electric rail operates the vehicle doors 1 at each station, at which the vehicle stops, using a vehicle monitor or an automatic train operation apparatus. When a door operation signal is input to a door controller (not shown) , the door controller primarily supplies current to the solenoids 17.

When current is supplied to the solenoids 17, the moving blocks 13' are attached to the respective cylindrical iron core 17a due to the magnetic force that is generated by the solenoids 17, and thus the fastening shafts 13 are moved upwards.

Subsequently, the fastening shafts 13 overcome the restoring forces of the first spring members 14, which are mounted to the respective lower portions of the fastening shafts, and move upwards until the first spring members 14 are compressed, and thus the doors 1 are lifted so as to be spaced apart from the floor of the vehicle by a predetermined distance.

Subsequently, the door controller secondarily operates the motor βa . When the screw shaft 4a that is directly connected to the shaft of the motor 6a is rotated according to the robational speed of the motor 6a, the moving units 15 move. In this case, the solenoid units 11 are fastened to the respective first sides of the moving units 15, and the screw shaft 4a is inserted in the second sides of the moving units 15.

When the doors 1 are moved to their predetermined positions and, thus the limit switches are operated, the rotation of the motor 6a is stopped and the supply of electricity to the solenoids 17 is interrupted, and thus the magnetic force of the solenoids 17 is lost.

Accordingly, the fastening shafts 13 are lowered downward, and thus the doors 1 are also lowered to the floor of the vehicle. In this case, the impact that may be generated when the doors 1 are lowered by gravity can be absorbed by the second spring member 14' .

Here, the first and second spring members 14 and 14' function to prevent the doors 1 from rapidly ascending or descending when the ascending or descending operation of the doors 1 is performed. In this manner, when the doors 1 are opened or closed, the doors are laterally opened or closed in the state in which the doors 1 are lifted so as to be spaced apart from the floor of the vehicle even when a foreign body is caught between the doors 1 and the slide rail. Accordingly, the doors 1 can be sufficiently opened or closed by the rotational force of the motor 6a.

Furthermore, although the above description has been made that the lateral opening or closing operation of the doors 1 is performed by the motor 6a and the screw shaft 4a, the present invention is not limited thereto. Alternatively, a hydraulic or pneumatic cylinder may be used. Accordingly, in the apparatus for opening and closing the door of an electric rail vehicle according to the present invention, the possibility of the operation of the doors 1 being hindered during the opening or closing operation of the doors 1 due to a foreign body that is caught between the entrance and exit doors and the slide rail is remarkably reduced, and thus passengers' safety and convenience can be enhanced.

Although the present invention has been disclosed in conjunction with the embodiment, those skilled in the art will appreciate that the present invention may be modified and changed in various ways within a range that does not depart from the spirit and scope of the present invention as disclosed in the accompanying claims. [industrial Applicability]

Claims

[CLAIMS]

[Claim l]

An apparatus for opening and closing a door of an electric rail vehicle, comprising: moving units configured to laterally move in a direction in which left and right doors are opened or closed; fastening means fastened to the left and right doors; and solenoid units fastened to respective first sides of the moving units, and configured so as to vertically move the left and right door along the fastening means in response to a door operation signal .

[Claim 2]

The apparatus according to claim 1, wherein each of the solenoid units comprises: a solenoid configured to generate a magnetic field when supplied with current; and a moving block.

[Claim 3]

The apparatus according to claim 2, wherein each of the fastening means comprises: a fastening plate mounted to a corresponding door ; and a fastening shaft configured such that one end thereof is fastened to the fastening plate and such that a remaining end thereof is inserted into a corresponding solenoid unit.

[Claim 4]

The apparatus according to claim 2 or 3, wherein: a through-hole is formed such that a fastening shaft passes through a central portion of each of the solenoid units; the moving block is fastened to the fastening shaft inserted into the through-hole; and a cylindrical iron core is fastened to an inner surface of an upper portion of the solenoid unit so as to be spaced apart from the moving block by a predetermined distance.

[Claim 5]

The apparatus according to claim 3, wherein a first spring member is mounted on the fastening shaft between a lower end of the corresponding solenoid unit and the fastening plate.

[Claim β] The apparatus according to claim 5, wherein a second spring member is mounted on the fastening shaft between an upper end of the corresponding solenoid unit and a corresponding support.

[Claim 7]

The apparatus according to any one of claims 1 to 6, wherein the fastening shaft is made of nonmagnetic material.