KR101851748B1 - Locking device for screen door - Google Patents

Abstract

The present invention relates to a locking instrument for a screen door. According to the present invention, an instrument body is fixated on the top side of a fixed wall of the screen door. An elevation rod in a cylindrical shape performs elevating operation in front of the instrument body. A latch is fixated on the bottom end of the elevation rod to perform elevating operation together with the elevation rod. The latch is combined with a combination unit of operating doors on a left side and a right side of the screen door at the bottom dead point to be separated from the combination unit of the operating doors on the left side and the right side at the top dead point. An actuator is mounted on the instrument body to elevate the elevation rod. The actuator keeps the latch lowered to the bottom dead point during non-operation and elevates the latch to the top dead point during operation. An elevation guide is fixated on the instrument body to guide elevating operation of the elevation rod while penetrating the elevation rod. An elevation pin is fixated on the elevation rod to protrude towards the instrument body. A hole unit for the elevation pin is formed on the instrument body to guide elevating operation of the elevation pin while penetrating the elevation pin. The present invention is to provide the locking instrument for the screen door, which is able to prevent impurities from being generated due to abrasion and to prevent malfunctioning of the screen door.

Description

{Locking device for screen door}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking mechanism for a screen door that locks or unlocks a movable door in a closed state, which is employed in a screen door installed on a platform such as a subway.

Generally, the subway platform is structured such that the line side is opened so that passengers can board the train. As a result, passengers who are waiting for the train due to crowded passengers like commuting time or other reasons frequently fall down to the railway line, and the need for safety accidents has arisen.

Recently, a passenger who uses a train in the platform of the newly built subway station has installed a platform screen (screen door) which cuts off between the subway platform and the railway line in order to prevent various safety accidents that may occur in the waiting time Door (PSD) is installed. In addition, mandatory installation of screen doors is being gradually imposed on subway platforms where screen doors have not been installed.

The platform screen door is structured such that the entrance door and the movable door of the electric vehicle are operated to open and close only when the fixed screen (screen) and the movable door are installed on the landing side and the railway is stopped. Such a screen door not only secures passengers' safety, but also functions to keep the platform in a pleasant environment by increasing the effect of air conditioning while preventing intense winds and various dusts from entering the platform where passengers are waiting.

The movable door of a general screen door is composed of a pair of sliding doors which are slid on the left and right sides to open and close the doorway of the fixed wall as in the case of the doors of the electric vehicle. Only when the electric vehicle completely stops on the platform, Otherwise, the left and right movements are forced to remain in the closed state to prevent the passenger from approaching or falling to the track other than when waking or getting off. As described above, the screen door requires a locking mechanism for normally maintaining the closed state of the left and right movable doors, except when the train stops.

Registered Patent No. 10-1397459 (Published Apr. 23, 2014)

Disclosure of Invention Technical Problem [8] The present invention provides a locking mechanism for a screen door that can prevent the occurrence of impurities due to wear during locking or unlocking of a movable door of a screen door, thereby preventing a failure of the screen door in advance.

In order to accomplish the above object, according to the present invention, there is provided a locking mechanism for a screen door, which comprises left and right movable doors slidably moving left and right to be used in a screen door for opening and closing an entrance of a fixed wall, The lock mechanism for locking or unlocking the door includes a mechanism body, a lift rod, a latch, an actuator, an elevation guide, a lift pin, and a hole for the lift pin. The instrument body is fixed to the upper portion of the fixing wall. The lifting and lowering rod moves up and down in front of the instrument body and has a cylindrical shape. The latch is fixed to the lower end of the lifting rod and moves up and down together with the lifting rod. The latch is engaged with the engaging portions of the left and right movable doors at the bottom dead center and separated from the engaging portions of the left and right movable doors at the top dead center. The actuator is attached to the instrument body to move the lifting rod up and down. The lifting rod is lifted and lowered by the bottom dead center. The lifting and lowering guide is fixed to the tool body, and guides the lifting and lowering operation of the lifting and lowering rod while passing the lifting and lowering rod. The lift pin is fixed to the lifting rod and protrudes toward the tool body. The hole portion for the lift pin is formed in the tool body so as to guide the lifting and lowering operation of the lift pin in a state in which the lift pin is penetrated.

The locking mechanism according to the present invention can stably move the lifting rod without lifting in a locking or unlocking operation of the movable door by the latch, thereby preventing the occurrence of impurities due to wear and thereby preventing the screen door from being broken.

1 is a view showing an example of a screen door to which a locking mechanism for a screen door according to an embodiment of the present invention is applied.
2 is a perspective view of the locking mechanism for the screen door shown in Fig.
FIG. 3 is an exploded perspective view of FIG. 2. FIG.
Figure 4 is a bottom view of Figure 2;
Fig. 5 is a rear view of Fig. 2; Fig.
Figure 6 is a front view of Figure 2;
Fig. 7 is a view for explaining an operation example of the lock mechanism for a screen door in Fig. 6;

The present invention will now be described in detail with reference to the accompanying drawings. Here, the same reference numerals are used for the same components, and a detailed description of known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

1 is a view showing an example of a screen door to which a locking mechanism for a screen door according to an embodiment of the present invention is applied.

1, the screen door 10 is provided with a fixed wall 11 and a movable door 12 on a platform such as a subway, and only when the electric motor vehicle is stopped, the door of the electric motor vehicle and the movable door 12 are interlocked Closing operation. The screen door 10 operates in conjunction with the electric vehicle signaling system. The fixed wall (11) is disposed on the landing area so as to be isolated from the line, and has a doorway at a position corresponding to the door of the electric vehicle in a state where the electric vehicle is stopped. The movable doors 12 are provided in pairs in the same manner as the doors of the electric vehicle, and are arranged on the left and right sides. The left and right movable doors 12 slide left and right to close the openings of the fixed wall 11.

Such a screen door 10 employs a locking mechanism 100 according to an embodiment of the present invention. Here, the locking mechanism 100 can be mounted on the upper portion of the fixing wall 11. [ The locking mechanism 100 locks or releases the left and right movable doors 12 in a closed state. That is, the lock mechanism 100 releases the left and right movable doors 12 from the locked state so that the left and right movable doors 12 can be opened only when the electric vehicle completely stops at the landing, The left and right movable doors 12 are locked so as to maintain the closed state of the door 12.

2 is a perspective view of the locking mechanism for the screen door shown in Fig. FIG. 3 is an exploded perspective view of FIG. 2. FIG. Figure 4 is a bottom view of Figure 2; Fig. 5 is a rear view of Fig. 2; Fig. Figure 6 is a front view of Figure 2; Fig. 7 is a view for explaining an operation example of the lock mechanism for a screen door in Fig. 6;

2 to 7, a screen door locking mechanism 100 according to an embodiment of the present invention includes a mechanism body 110, a lifting rod 120, a latch 130, an actuator 140, An elevation guide 150, a lift pin 160, and a lift portion 170 for a lift pin.

The instrument body 110 is fixed to the upper portion of the fixing wall 11. The front portion of the instrument body 110 may be a flat vertical surface 110a. For example, the instrument body 110 may have a predetermined thickness and a vertically erected plate shape. The instrument body 110 may be made of a metal material such as stainless steel.

The lifting rod 120 moves up and down in front of the mechanism body 110. The lifting rod 120 has a cylindrical shape. The lifting and lowering rod 120 is vertically disposed and vertically connected to the actuator 140 to move up and down. The lifting rod 120 may have a constant outer diameter. The lifting rod 120 may be made of a metal material such as stainless steel.

The latch 130 is fixed to the lower end of the lifting rod 120 and moves up and down together with the lifting rod 120. Like the lifting rod 120, the latch 130 may be made of a metal material such as stainless steel. The latch 130 is engaged with the engaging portions of the left and right movable doors 12 at bottom dead center and separated from the engaging portions of the left and right movable doors 12 at the top dead center. Here, the top dead center and the bottom dead center of the latch 130 correspond to the uppermost position and the lowermost position of the latch 130 according to the stroke length of the lifting rod 120.

For example, the engaging portion may be formed of locking protrusions 12a formed at upper ends of the left and right movable doors 12 adjacent to each other. In this case, the latch 130 has a pair of lock holes 130a. When the latch 130 is lowered to the bottom dead center in the state where the left and right movable doors 12 are closed, the lock holes 130a insert the locking protrusions 12a to lock the left and right movable doors 12 I will. In this state, when the latch 130 rises to the top dead center, the lock holes 130a separate from the locking protrusions 12a, thereby releasing the locked state of the left and right movable doors 12. [

The locking holes 130a are sized to allow the locking protrusions 12a to be inserted smoothly. The lock holes 130a are formed in the lock protrusions 12a so that even if the lock 130 rotates up to an angle about the vertical axis of the lift rod 120 by the lift pins 160 and the lift pins 170 for the lift pins, Each of which is sized to be inserted smoothly.

The lifting state of the latch 130 may be sensed by the position sensing unit 136. The position sensing unit 136 may include a hall sensor 136a and a permanent magnet 136b. The hall sensor 136a senses the magnetic field using a Hall effect in which a voltage is generated in a direction perpendicular to a current and a magnetic field when a magnetic field is applied to a conductor through which the current flows. The permanent magnet 136b is for generating a magnetic field.

The hall sensor 136a is fixed to the instrument body 110. The permanent magnet 136b is disposed below the hall sensor 136a and connected to the lifting rod 120. [ The permanent magnet 136b may be fixed to a lifting bracket 180 to be described later and connected to the lifting rod 120. [ The permanent magnets 136b are operated to move up and down together with the lifting and lowering rod 120. Therefore, the permanent magnet 136b approaches the hall sensor 136a when lifted, and moves away from the hall sensor 136a when it is lifted. The hall sensor 136a senses the up / down state of the lifting rod 120 by generating a voltage change according to the lifting position of the permanent magnet 136b. As a result, the lifting state of the latch 130 connected to the lifting rod 120 can be detected.

The controller 130 controls the operation of the actuator 140 by using the information sensed by the position sensing unit 136. The control unit 140 controls the operation of the actuator 140 based on the information detected by the position sensing unit 136, Can be controlled.

The actuator 140 is mounted on the instrument body 110 to lift the lifting rod 120. The actuator 140 keeps the acetabular clasp 130 in a lowered state at the bottom dead center, and raises the clasp 130 to the top dead center during driving. The actuator 140 can be controlled by the control unit of the screen door 10.

6, the left and right movable doors 12 of the screen door 10 are closed and the actuators 140 are respectively controlled to be in a non-driven state, as shown in Fig. 6 So that the latch 130 is positioned at the bottom dead center. At this time, the lock holes 130a of the latch 130 lock the left and right movable doors 12 with the locking protrusions 12a of the left and right movable doors 12 inserted.

7, when the control unit of the screen door 10 receives the movable door open signal from the electric railcar signaling system, the actuator 140 is driven so that the latch 130 To lift the lock holes 130a of the latches away from the locking protrusions 12a of the left and right movable doors 12 and then open the left and right movable doors 12. [

When the passenger is on board the train and the controller of the screen door 10 receives the door closing signal from the electric rail signal system, the doors 12 and 14 are closed completely and then the actuator The latch 130 is lowered to the bottom dead point so that the locking holes 130a of the latch 130 insert the locking protrusions 12a of the left and right movable doors 12 respectively. Therefore, the left and right movable doors 12 can be locked in a closed state.

For example, the actuator 140 may be a solenoid type actuator. In this case, the solenoid actuator includes a main body 141, a plunger 142, and an elastic member 143. The main body 141 has a structure in which a coil is disposed inside the housing so as to surround the plunger 142. The plunger 142 is pulled out through one opening of the main body 141 and has magnetism. The elastic member 143 applies an elastic force to the plunger 142 in a direction in which the plunger 142 is pulled out from the main body 141. The elastic member 143 may be a compression coil spring and may be disposed between the main body 141 and the plunger 142 so as to surround the plunger 142.

Such a solenoid-operated actuator acts as follows. When a drive current is supplied to the coil, the plunger 142 is pulled into the coil and is drawn into the housing of the main body 141. At this time, the elastic member 143 is elastically deformed. In this state, when the supply of driving current to the coil is interrupted, the plunger 142 operates to be pulled out of the housing of the main body 141 by the resilient restoring force of the elastic member 143.

The plunger 142 is disposed in front of the instrument body 110 so as to move up and down from the lower side of the body 141 and the body 141 is fixed to the instrument body 110 in this state. The upper end of the lifting rod 120 is fixed to the lower end of the plunger 142 so that the lifting rod 120 can move up and down together with the lifting operation of the plunger 142. The lifting rod 120 may be coaxially arranged and fixed to the plunger 142.

The elevation guide 150 is fixed to the instrument body 110. The lifting and lowering guide 150 guides the lifting and lowering operation of the lifting rod 120 in a state in which the lifting and lowering rod 120 is pierced. For example, the elevation guide 150 may include a bush 151 and a bush support block 152. The bush 151 has a hollow cylindrical shape. The bush 151 can guide the lifting and lowering operation of the lifting rod 120 while passing the lifting rod 120 through the hollow. The bush 151 prevents wear and noise from being generated due to friction when the lifting rod 120 is lifted or lowered.

The bush 151 may be a DU bush or the like. DU Buses, also referred to as DU dry bearings, are double-layered, non-lubricated bearings that use Teflon and lead mixtures with excellent lubricity and abrasion resistance as solid lubricants. The DU bushing has a structure in which a porous bronze sintered layer and a solid lubricant layer are sequentially laminated on a base steel plate.

The bush support block 152 is formed so as to surround the bush 151 and supports the bush 151. The bush support block 152 is fixed to the instrument body 110 while supporting the bush 151. The bush support block 152 may be made of aluminum or the like.

The lifting rod 120 may further include a stopper 126. The stopper 126 may be fixed to the lifting rod 120 at a position above the lifting guide 150. The stopper 126 abuts against the upper end of the elevation guide 150 in a state in which the latch 130 is lowered to the bottom dead center, so that the descent height of the elevation rod 120 can be limited. The stopper 126 has a ring shape and can be fitted to the lifting rod 120. The stopper 126 is made of a material such as silicon, rubber, etc., so that the stopper 126 can absorb the noise and reduce the noise.

The lift pin 160 is fixed to the lifting rod 120 and protrudes toward the mechanism body 110. The lift pins 160 move up and down together with the lift rods 120 when the lift rods 120 move up and down. The lift pins 160 may have a certain outer diameter and may be arranged horizontally long. The second end of the lifting pin 160 can be fitted into the hole 170 for the lifting pin of the mechanism body 110 while the first end of the lifting pin 160 is fixed to the lifting rod 120. The first end of the lifting pin 160 can be fixedly engaged with the lifting rod 120. [ The first end of the lifting pin 160 may pass through the lifting rod 120 and may be fitted to the lifting bracket 180 to be described later. The lift pin 160 may be made of a material such as stainless steel. The surface of the lifting pin 160 may be heat treated to have wear resistance or coated with a material such as Teflon.

The hole portion 170 for the lift pin is formed in the tool body 110 so as to guide the lift-up operation of the lift pin 160 in a state where the lift pin 160 passes through. The lift pins 170 for the lift pins guide the lifting operation of the lift pins 160 by sandwiching the second ends of the lift pins 160. The hole portion 170 for the lift pins minimizes the contact area with the lift pins 160 during the lifting and lowering of the lifting rod 120, thereby preventing the generation of impurities due to wear. As a result, failure of the screen door 10 due to impurities can be prevented.

The hole portion 170 for the lifting pin may have a vertically elongated shape with a predetermined width. The hole portion 170 for the lift pin can be formed to be loose fit with the lift pin 160. The loose fitting is a fitting to such an extent that the lifting pin 160 can move within the lifting pin 170 for the lifting pin.

The elevating pin hole portion 170 restricts the rotation of the latch 130 only to the limited angle around the vertical axis of the lifting rod 120 by the interaction with the lifting pin 160, can do.

In detail, since the lifting rod 120 is formed in a columnar shape and is lifted and guided by the lifting guide 150, the lifting rod 120 is freely rotatable about the vertical axis. As a result, the latch 130 fixed to the lifting rod 120 is also freely rotatable about the vertical axis of the lifting rod 120. When the locking holes 130a of the latch 130 are moved to the left and right movable doors 12 can not be inserted, the left and right movable doors 12 can not be locked. The elevating pin 160 and the hole portion 170 for the elevating pin restrict the rotation angle of the latch 130 so that the locking holes 130a can smoothly insert the locking protrusions 12a.

On the other hand, the locking mechanism 100 may further include a lifting bracket 180. The center portion of the lifting bracket 180 is fixed to the lifting rod 120 and the left and right portions of the lifting and lowering bracket 180 are curved toward the vertical surface 110a of the instrument body 110 and are respectively set from the vertical surface 110a of the instrument body 110 Gap G is formed. The lifting and lowering bracket 180 can be fastened to the lifting rod 120 by a member such as a bolt.

The lifting and lowering bracket 180 rotates together with the lifting rod 120 when the lifting rod 120 rotates about the vertical axis so that the left or right side portion abuts against the vertical surface 110a of the tool body 110 , It is possible to restrict the clasp 130 to rotate only up to a limited angle about the vertical axis of the lifting rod 120. [ Therefore, the lifting and lowering bracket 180 can assist the lifting pin 160 and the lifting pin 170 during lifting and lowering of the lifting rod 120, thereby preventing the lifting pin 160 from being damaged.

The left and right portions of the lifting bracket 180 can be lifted and lowered from the vertical surface 110a of the instrument body 110, Compared with a case in which the lifting and lowering operation is performed while being in contact with the first and second guide grooves 110a and 110a. The lifting bracket 180 may be made of stainless steel or the like. The lifting bracket 180 can mount and support the permanent magnet 136b of the position sensing portion 136. [

The locking mechanism 100 may further include a spacer 116. The spacer 116 is disposed between the mechanism body 110 and the actuator 140 so as to separate the left and right portions of the lifting bracket 180 from the vertical surface 110a of the instrument body 110 from the set gap G, . The spacers 116 are formed in a plate shape having a predetermined thickness and can be fastened to the instrument body 110 with bolts or the like. The spacer 116 may be made of stainless steel or the like.

The size of the gap G in which the left and right portions of the lifting bracket 180 are spaced apart from the vertical surface 110a of the instrument body 110 can be set according to the thickness of the spacer 116. [ Although not shown, it is also possible that the spacer 116 is omitted, but the convex portion is formed integrally with the mechanism body 110 by the thickness of the spacer 116.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation and that those skilled in the art will recognize that various modifications and equivalent arrangements may be made therein. It will be possible. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10. Screen door 11. Fixing wall
12 .. movable door 100 .. lock mechanism
110 .. instrument body 116 .. spacer
120 .. lifting rod 126 .. stopper
130 .. latch 136 .. position sensing part
140 .. actuator 150 .. lift guide
160 .. Lift pin 170 .. Hold pin for lift pin
180 .. lifting bracket

Claims (3)

delete A locking mechanism for locking or unlocking the left and right movable doors in a closed state, which is employed in a screen door for sliding the left and right movable doors to open and close the entrance of the fixed wall,
A fixture body fixed to the upper portion of the fixing wall and having a flat vertical surface at a front portion thereof;
A lifting rod having a cylindrical shape and moving up and down in front of the instrument body;
A latch which is fixed to a lower end of the lifting rod and moves up and down together with the lifting rod, is engaged with left and right movable door engaging portions at bottom dead center and separated from the left and right movable door engaging portions at top dead center;
An actuator mounted on the instrument body to move the lifting rod up and down to hold the latch in a lowered state at the bottom dead center and raise the latch to the top dead point when driven;
A lifting guide fixed to the tool body and guiding the lifting operation of the lifting rod in a state where the lifting rod is passed through;
A lifting pin fixed to the lifting rod and protruding toward the mechanism body;
A lift portion for a lift pin formed on the tool body to guide the lift-up operation of the lift pin in a state where the lift pin passes through; And
A lifting bracket having a central portion fixed to the lifting rod, and left and right portions bent toward a vertical surface of the instrument body and spaced apart from a vertical surface of the instrument body, respectively, to a predetermined gap;
And a locking mechanism for locking the screen door. 3. The method of claim 2,
And a spacer disposed between the mechanism body and the actuator so as to separate the left and right portions of the lifting bracket from the vertical surface of the mechanism body, respectively, to a predetermined gap.

Images