KR20230135296A - Locking mechanism for sliding door of train - Google Patents

Abstract

A mechanical locking device for a train door related to the present invention includes a door frame formed parallel to the moving direction of the door; a screw disposed parallel to the door frame and rotatable by a drive motor; a transport body connected to the door, restrained by the screw, and configured to be transported in a straight line according to the rotation of the screw; a first guide preventing rotation of the transport body in a first direction at an upper portion of the screw; a second guide at a lower portion of the screw to prevent rotation of the transfer member in a second direction opposite to the rotation in the first direction; a locking unit formed on one side of the transport body and having a first locking protrusion hooked on the first guide as the screw rotates and a second locking protrusion hooked on the second guide; And after the door is moved to the closed position by rotation of the screw, at least one of the first locking protrusion or the second locking protrusion is restrained by additional rotation of the screw and opened by an external force applied to the door. It includes a locking part that prevents.

Description

Mechanical locking device for train doors {LOCKING MECHANISM FOR SLIDING DOOR OF TRAIN}

The present invention relates to a locking device that can automatically lock slide doors such as trains or safety screens so that they cannot be arbitrarily opened in a closed state.

Automatic doors used to enter and exit trains such as electric trains, subways, and screen doors are configured so that the driving part that operates the door can be operated by a control signal. Since many doors of multiple carriages are controlled from one place, such as the driver's cab, various emergency situations can occur, and technical safety measures are prepared accordingly. As such an example, the doors cannot be opened or closed while the train is moving, and if the doors are opened in an emergency while the train is in motion, the train automatically comes to an emergency stop. In the case of a passenger-type electric train, it is possible to start the car even with some doors open due to a breakdown, but in controlling the door, it is necessary to block the door and take sufficient safety measures.

One method used to drive the door of a passenger car is to slide the door using a transfer screw to convert the rotation of the motor into linear motion. The screw type is resistant to heat and fire, has excellent opening and closing accuracy, can be manufactured in narrow widths, and can reduce costs, so its installation is increasing in recent years. During the closing operation, if the motor stops rotating after the door has been moved to the closed position, the door remains closed. However, in this state, if an external force acts on the door in the opening direction, the rotation of the motor may be reversed and the door may be opened. If the train is running, such door opening may lead to danger or safety accidents, so arbitrary opening of the door must be blocked. For this purpose, the door is equipped with means to prevent it from opening arbitrarily in the closed state. However, in the existing door opening and closing system that uses screws, the mechanical elements for this are complicated and have low stability, so there is a possibility of damage and the burden of maintenance is high.

* Related prior art

Korean Patent No. 10-2153225 (registered on September 1, 2020)

Korean Patent Publication No. 10-2013-0024522 (published on March 8, 2013)

Korean Patent No. 10-2228976 (registered on March 11, 2021)

The purpose of the present invention is to propose a mechanical automatic locking device for a train door that can prevent the door from being opened by external force in a closed state and has mechanical stability and durability.

A mechanical locking device for a train door related to the present invention includes a door frame formed parallel to the moving direction of the door; a screw disposed parallel to the door frame and rotatable by a drive motor; a transport body connected to the door, restrained by the screw, and configured to be transported in a straight line according to the rotation of the screw; a first guide preventing rotation of the transport body in a first direction at an upper portion of the screw; a second guide at a lower portion of the screw to prevent rotation of the transfer member in a second direction opposite to the rotation in the first direction; a locking unit formed on one side of the transport body and having a first locking protrusion hooked on the first guide as the screw rotates and a second locking protrusion hooked on the second guide; And after the door is moved to the closed position by rotation of the screw, at least one of the first locking protrusion or the second locking protrusion is restrained by additional rotation of the screw and opened by an external force applied to the door. It includes a locking part that prevents.

As an example related to the present invention, the first guide and the second guide may be formed integrally with the door frame.

As an example related to the present invention, the first guide and the second guide may be formed parallel to the screw.

As an example related to the present invention, the first guide and the second guide may be formed in the shape of an arm when viewed in cross section so that the first and second stopping protrusions can be guided by contacting each other in only one direction. .

As an example related to the present invention, the first locking protrusion and the second locking protrusion may further include bearings or rollers so as to be in rolling contact with the first guide and the second guide.

As an example related to the present invention, the locking part may be formed in the form of a hollow sleeve having a first slot into which the first locking protrusion is caught and a second slot into which the second locking protrusion is caught.

As an example related to the present invention, the locking part may be coupled to the door frame by being fastened with a screw.

As an example related to the present invention, the open entrances of the first slot and the second slot may be formed at positions corresponding to end points of the first guide and the second guide, respectively.

As an example related to the present invention, the first slot and the second slot are formed in a direction perpendicular to the moving direction of the screw after the first and second locking protrusions are guided in a curved shape from the open inlet. It can be formed in an arc or 'L' shape so that it can be moved and hung in parallel.

As an example related to the present invention, the first slot and the second slot may each be formed at axially symmetrical opposing positions around the screw.

The present invention also proposes a train door system having the above mechanical locking device.

According to the mechanical locking device for train doors related to the present invention, the first guide and the second guide arranged above and below in parallel to the screw, and the first and second stopping protrusions hooked on them are configured to be caught in the locking part, When the screw is moved to the closed position, the first locking protrusion and the second locking protrusion are automatically caught in the locking part to implement a locking state. Since the locking force is applied from both the top and bottom of the screw, mechanical stability is excellent. It has the advantage of reducing the possibility of damage due to breakdown, wear, or impact and reducing the burden of maintenance and repairs.

Figure 1 is a perspective view schematically showing a mechanical locking device 100 for a train door related to the present invention.
Figure 2 is a view of the mechanical locking device 100 for the train door of Figure 1 from another side.
Figure 3 shows the mechanical locking device 100 for a train door when the door is open.
Figure 4 is a cross-sectional view showing the assembled state of the locking unit 150, the first guide 141, and the second guide 142 of the mechanical locking device 100 for a train door related to the present invention.
Figure 5 is a partial cross-sectional perspective view showing the locking portion 160 related to the present invention.
FIG. 6 is a diagram showing the shape of the first slot 161 included in the locking unit 160 of FIG. 5.
Figures 7 and 8 are operating state diagrams showing that the first locking protrusion 151 is caught in the first slot 161 when the door moves to the closed position in relation to the present invention.

Hereinafter, the mechanical locking device for train doors related to the present invention will be described in detail with reference to the attached drawings.

1 to 3, driving elements for opening and closing the door are installed on the top of the train door (not shown). The door frame 110 is formed parallel to the moving direction of the door and accommodates a screw 120 and a drive motor 121 therein. The screw 120 is arranged parallel to the door frame 110 and is rotatable by the drive motor 121. A transport body 130 is assembled to the screw 120 and is constrained to the screw 120 so that it can be transported in a straight line as the screw 120 rotates. Although not shown, a connection portion 131 to which a fork supporting the door is coupled is formed on the transport body 130.

A first guide 141 and a second guide 142 are formed on the upper and lower sides of the screw 120, respectively, in parallel with the screw 120. The first guide 141 serves to prevent rotation of the transport body 130 in the first direction, and the second guide 142 serves to prevent rotation in the second direction opposite to the first direction. The first guide 141 and the second guide 142 will be described in detail with reference to FIG. 4 and below.

On one side of the transport body 130, a first locking protrusion 151 that is caught by the first guide 141 as the screw 120 rotates and a second locking protrusion 153 that is caught by the second guide 142. A locking unit 150 is provided. These first locking protrusions 151 and second locking protrusions 153 are caught by the first guide 141 and the second guide 142, preventing the transfer body 130 from rotating and transporting it linearly. , In the closed position of the door, it is caught by the locking part 160 to prevent the door from opening arbitrarily.

Figure 4 is a cross-sectional view showing the assembled state of the locking unit 150, the first guide 141, and the second guide 142 of the mechanical locking device 100 for a train door related to the present invention. The first guide 141 and the second guide 142 may be manufactured separately and attached to the door frame 110, or may be formed integrally, and are formed parallel to the screw 120. Figure 4 exemplarily shows that the first guide 141 and the second guide 142 are formed integrally with the door frame 110. At this time, when the first guide 141 and the second guide 142 are viewed in cross section as shown in FIG. 4, the first locking protrusion 151 and the second locking protrusion 153 can be guided by contacting each other in only one direction. Each is formed in a one-arm shape. That is, as shown in FIG. 4, if the screw 120 rotates counterclockwise, the first stopping protrusion 151 is in contact with the first guide 141, so the transfer body 130 does not rotate, and on the contrary, the screw If (120) rotates clockwise, the first locking protrusion 151 may be able to rotate clockwise, but the second locking protrusion 153 is blocked by the second guide 142, blocking rotation, and thus the transfer body ( 130) moves in a straight line. The first locking protrusion 151 and the second locking protrusion 153 may be provided with bearings 154 and 155 or rollers so as to be in rolling contact with the first guide 141 and the second guide 142.

Near the end of the screw 120, the door moves to the closed position by rotation of the screw 120, and then the first and second locking protrusions 151 and 153 are restrained by additional rotation of the screw 120. A locking unit 160 is provided to prevent opening by external force applied to the door. As shown in Figure 5, the locking part 160 is in the form of a hollow sleeve having a first slot 161 into which the first locking protrusion 151 is caught and a second slot 162 into which the second locking protrusion 153 is caught. It is written as . The locking unit 160 may be fastened to the door frame 110 using screws.

As shown in Figure 5, the first slot 161 and the second slot 162 are formed at positions corresponding to the end points of the first guide 141 and the second guide 142, respectively. In terms of shape, the first slot 161 and the second slot 162 have an open entrance, as shown in FIG. 6, and the first and second stopping protrusions 151 and 153 are formed from the open entrance. It is formed in an arc or 'L' shape so that it is guided in a curved shape and then moved parallel to the direction perpendicular to the direction of movement of the screw 120 and hung. In terms of position, the first slot 161 and the second slot 162 are formed at axially symmetrical opposite positions with the screw 120 as the center, so that the first locking protrusion 151 and the second locking protrusion 153 are formed. Shock or load during the hanging process is distributed, providing mechanical stability.

7 and 8 show that the first locking protrusion 151 is caught in the first slot 161 when the door moves to the closed position. That is, as shown in FIG. 7, the first stopping protrusion 151, which is moved linearly in contact with the first guide 141, is directly at the open entrance of the first slot 161 at the position where the first guide 141 ends. Enter. Since the first slot 161 is curved, it is rotated by the rotation of the screw 120 and is moved to a deep part of the first slot 161 and hung. Likewise, the second locking protrusion 153 on the opposite side is similarly moved and caught with respect to the second slot 162.

In this way, the first locking protrusion 151 and the second locking protrusion 153 are connected to the transport body 130 by the first guide 141 and the second guide 142 disposed above and below in parallel to the screw 120. It can guide the door to move quietly in a straight line without rotating, and when the door moves to the closed position, the first locking protrusion (151) and the second locking protrusion (153) automatically lock the locking portion (160). A lock state can be implemented by being caught in the first slot 161 and the second slot 162, respectively. The first locking protrusion 151 and the second locking protrusion 153, which are an upper and lower pair, and the first slot 161 and the second slot 162 exert a locking force on both the top and bottom of the screw 120. By doing so, mechanical stability is excellent, and the possibility of damage due to breakdown, wear, or impact is reduced, and the burden of maintenance and repairs can be reduced.

The mechanical locking device for train doors described above is not limited to the configuration and method of the described embodiments. The above embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

110: door frame 120: screw
121: Drive motor 130: Transport body
141: 1st guide 142: 2nd guide
150: Locking unit 151: First locking protrusion
153: second locking protrusion 154, 155: bearing
160: Locking unit 161: First slot
162: 2nd slot

Claims (11)

A door frame formed parallel to the moving direction of the door;
a screw disposed parallel to the door frame and rotatable by a drive motor;
a transport body connected to the door, restrained by the screw, and configured to be transported in a straight line according to the rotation of the screw;
a first guide preventing rotation of the transport body in a first direction at an upper portion of the screw;
a second guide at a lower portion of the screw to prevent rotation of the transfer member in a second direction opposite to the rotation in the first direction;
a locking unit formed on one side of the transport body and having a first locking protrusion hooked on the first guide as the screw rotates and a second locking protrusion hooked on the second guide; and
After the door is moved to the closed position by rotation of the screw, at least one of the first locking protrusion or the second locking protrusion is restrained by additional rotation of the screw to prevent opening by an external force applied to the door. A mechanical locking device for a train door, including a locking portion that prevents.
According to paragraph 1,
A mechanical locking device for a train door, wherein the first guide and the second guide are formed integrally with the door frame.
According to paragraph 1,
The first guide and the second guide are formed parallel to the screw, a mechanical locking device for a train door.
According to paragraph 3,
The first guide and the second guide are formed in a cane-shaped shape when viewed in cross section so that the first and second locking protrusions can be guided by contacting each other in only one direction. A mechanical locking device for a train door.
According to paragraph 4,
The first locking protrusion and the second locking protrusion further include a bearing or roller so as to be in rolling contact with the first guide and the second guide.
According to paragraph 1,
The locking part,
A mechanical locking device for a train door formed in the form of a hollow sleeve having a first slot into which the first locking protrusion is caught and a second slot into which the second locking protrusion is caught.
According to clause 6,
A mechanical locking device for a train door, wherein the locking part is fastened to the door frame with a screw.
According to clause 6,
A mechanical locking device for a train door, wherein the open entrances of the first slot and the second slot are respectively formed at positions corresponding to end points of the first guide and the second guide.
According to clause 8,
The first slot and the second slot are formed by an arc or an arc so that the first and second locking protrusions are curved from the open inlet and then moved parallel to the direction perpendicular to the direction of movement of the screw. A mechanical lock for train doors, formed in an 'L' shape.
According to clause 6,
The first slot and the second slot are each formed at axially symmetrical opposing positions about the screw.
A door system for a train having the mechanical locking device of any one of claims 1 to 10.