INSTALLATION STRUCTURE OF AUXILIARY LOCKING DEVICE FOR HINGED DOOR

Abstract

The present invention relates to an installation structure of an auxiliary locking device for a hinged door, and by operating a rotation lever installed on a door frame separately from a generally used security main locking device, the rotating opening side of the hinged door is vertically attached to the door frame in close contact with the door frame at a number of points in the longitudinal direction, and in order to make it easier to fix and maintain such a tight state. More particularly, the present invention is directed to providing new installation structure of the auxiliary locking device of the hinged door capable of preventing the mutual interference of the driving plate and locking piston, even if the longitudinal installation range of the driving plate is overlapped with the operating range of the locking piston constituting the second locking tool.

Claims

1-9. (canceled)

10. A structure of auxiliary locking device of a hinged door, characterized in that as an opening and closing device for a hinged door 1, the driving plate 110: 110{circle around (1)}, 110{circle around (2)} upwardly and downwardly moved by a switching device 100 constituting the auxiliary locking device of a hinged door, is respectively disposed in the upper section and in the lower section of the area in which the first locking tool 1h, 1s, 1sa and the second locking tool 1ph, 1p, 1pv are installed, which are provided as the main locking device for security between the rotating opening side of the hinged door 1 and the door frame 1a side, and sliding pockets 110a at the upper and lower portions are installed separately in the longitudinal direction on the side of the door frame 1a in order to accommodate the driving plates, respectively, a connecting plate 210 is provided as a connecting means installed so as to reciprocate between the upper and lower sliding pockets 110a and interconnect the upper and lower drive plates 110{circle around (1)}, 110{circle around (2)} that are separately installed up and down, wherein the connecting plate 210 comprising an upper connecting plate 211 connected to the lower end of the upper driving plate 110{circle around (1)}, and a lower connecting plate 212 connected to the upper end of the lower driving plate 110{circle around (2)} and connected so that the upper connecting plate 211 is not separated in the longitudinal direction but can be separated only in the front-rear direction, a base plate 220 is provided, wherein the base plate 220 being installed between the upper and lower sliding pockets 110a separated and separated to each other to support the bottom surface of the connecting plate 210 and to guide the vertical movement of the connecting plate 210, and a cover plate 230 is provided on an upper surface of the base plate 220 to be spaced apart from each other by a height exceeding the thickness of the connecting plate 210 in order to form an operating space allowing the connecting plate 210 to move in the longitudinal direction, wherein a pocket installation groove 233 in which a cylinder pocket 1sa accommodating a locking cylinder is constituting the first locking tool is installed is provided on the upper surface of the cover plate 230, and wherein the cover plate 230 and the connecting plate 210 are provided with locking piston through holes 234, 212b, respectively, so that the lateral operating range of the locking piston 1p constituting the second locking tool can reach the base plate region.

11. The structure of auxiliary locking device of a hinged door of claim 10, wherein the auxiliary locking device for a hinged door including the switching device 100 is additionally provided in order to realize a close contact state to a door frame 1a of a hinged door 1 provided with two or more locking tools ‘1h, 1s, 1sa’, ‘1ph, 1p, 1pv’ as a main locking device for security, the auxiliary locking device of a hinged door comprises; a plurality of close contact guide plates 130 that are installed longitudinally and spaced apart from the rotating opening side of the hinged door 1; a plurality of pressure rolls 120 provided longitudinally spaced apart from the door frame 1a side so that in a state in which the rotating opening side of the hinged door 1 is closed on the door frame 1a side, in a contact state with the close contact guide plates 130, the rotating opening side of the hinged door 1 is pulled toward the door frame 1a side, thereby implementing a compressed locked state, and so that in a non-contact state with the close contact guide plates 130, a uncompressed locked state of the rotating opening side of the hinged door 1 against the door frame 1a side is implemented; a driving plate 110 installed in a sliding pocket 110a provided in a longitudinal direction on the door frame side so that the pressure rolls 120 can be installed to be slidably movable in a longitudinal direction from the side of the door frame 1a, and provided so that the pressure rolls 120 are spaced apart in the longitudinal direction on the front side; and a switching device 100 installed in the door frame 1a so that the second pressure roll 120b switches between a contact compressed state position with the close contact guide plate 130 and a non-contact uncompressed state position through a longitudinal movement displacement, so that can induce a corresponding longitudinal movement displacement of the driving plate 110 by providing a longitudinal movement displacement by engaging with at least one first pressure roll 120a among the pressure rolls 120 installed on the driving plate 110, and so that can generate the longitudinal movement displacement of the remaining second pressure roll 120b induced by the longitudinal movement displacement of the drive plate 110.

12. The structure of auxiliary locking device of a hinged door of claim 10, wherein the connecting plate 210 installed to interconnect the upper driving plate 110{circle around (1)} and the lower driving plate 110{circle around (2)} installed separately in the vertical direction, in order to be connected so that the upper connecting plate 211 and the lower connecting plate 212 are not separated from each other in the longitudinal direction but can be separated only in the front and rear direction, is characterized in that the lower end of the upper connecting plate 211 includes a male fastener 211a, and the upper end of the lower connecting plate 212 includes a female fastener 212a that is fastened in a front-rear direction fitting method.

13. The structure of auxiliary locking device of a hinged door of claim 12, characterized in that the cover plate 230 is rigidly fixed to the door frame 1a by a fastening piece fs1 penetrating the cover plate 230 and the base plate 220, and so that the movement of the connecting plate 210 in the vertical direction is not disturbed by the fastening piece fs1 that is fastened through the cover plate 230 and the base plate 220, a fastening piece through-hole 211b having a long hole shape is provided at a predetermined central position of the upper connecting plate 211, and a locking piston through-hole 212b is provided at a predetermined central position of the lower connecting plate 212.

14. The structure of auxiliary locking device of a hinged door of claim 10, wherein the structure in which the cover plate 230 is spaced apart from the base plate 220, is implemented through a spacer 222 provided to support a portion of the upper surface of the base plate 220 and a portion of the bottom surface of the cover plate 230.

15. The structure of auxiliary locking device of a hinged door of claim 14, wherein the spacer 222 is integrally protruded from the upper surface of the base plate 220, and a mounting groove is additionally provided on the lower surface of the cover plate 230.

16. The structure of auxiliary locking device of a hinged door of claim 13, wherein a pocket installation groove 233 in which a cylinder pocket 1sa for accommodating the locking cylinder is constituting the first locking tool is fixedly installed is provided on the upper surface of the cover plate 230, and a locking piston through-hole 234 is also provided in the cover plate 230 at a position corresponding to the formation position of the locking piston through-hole 212b of the lower connecting plate 212 so that the lateral operating range of the locking piston 1p constituting the second locking tool can reach the base plate 220 region.

17. The structure of auxiliary locking device of a hinged door of claim 16, wherein the base plate 220 is provided with a locking piston through-hole 224 at a position corresponding to the provision position of the locking piston through-hole 212b of the lower connecting plate 212.

18. The structure of auxiliary locking device of a hinged door of claim 11, wherein the connecting plate 210 installed to interconnect the upper driving plate 110{circle around (1)} and the lower driving plate 110{circle around (2)} installed separately in the vertical direction, in order to be connected so that the upper connecting plate 211 and the lower connecting plate 212 are not separated from each other in the longitudinal direction but can be separated only in the front and rear direction, is characterized in that the lower end of the upper connecting plate 211 includes a male fastener 211a, and the upper end of the lower connecting plate 212 includes a female fastener 212a that is fastened in a front-rear direction fitting method.

19. The structure of auxiliary locking device of a hinged door of claim 18, characterized in that the cover plate 230 is rigidly fixed to the door frame 1a by a fastening piece fs1 penetrating the cover plate 230 and the base plate 220, and so that the movement of the connecting plate 210 in the vertical direction is not disturbed by the fastening piece fs1 that is fastened through the cover plate 230 and the base plate 220, a fastening piece through-hole 211b having a long hole shape is provided at a predetermined central position of the upper connecting plate 211, and a locking piston through-hole 212b is provided at a predetermined central position of the lower connecting plate 212.

20. The structure of auxiliary locking device of a hinged door of claim 19, wherein a pocket installation groove 233 in which a cylinder pocket 1sa for accommodating the locking cylinder is constituting the first locking tool is fixedly installed is provided on the upper surface of the cover plate 230, and a locking piston through-hole 234 is also provided in the cover plate 230 at a position corresponding to the formation position of the locking piston through-hole 212b of the lower connecting plate 212 so that the lateral operating range of the locking piston 1p constituting the second locking tool can reach the base plate 220 region.

21. The structure of auxiliary locking device of a hinged door of claim 20, wherein the base plate 220 is provided with a locking piston through-hole 224 at a position corresponding to the provision position of the locking piston through-hole 212b of the lower connecting plate 212.

22. The structure of auxiliary locking device of a hinged door of claim 11, wherein the structure in which the cover plate 230 is spaced apart from the base plate 220, is implemented through a spacer 222 provided to support a portion of the upper surface of the base plate 220 and a portion of the bottom surface of the cover plate 230.

23. The structure of auxiliary locking device of a hinged door of claim 22, wherein the spacer 222 is integrally protruded from the upper surface of the base plate 220, and a mounting groove is additionally provided on the lower surface of the cover plate 230.

24. The structure of auxiliary locking device of a hinged door of claim 13, wherein a pocket installation groove 233 in which a cylinder pocket 1sa for accommodating the locking cylinder 1s constituting the first locking tool is fixedly installed is provided on the upper surface of the cover plate 230, and a locking piston through-hole 234 is also provided in the cover plate 230 at a position corresponding to the formation position of the locking piston through-hole 212b of the lower connecting plate 212 so that the lateral operating range of the locking piston 1p constituting the second locking tool can reach the base plate 220 region.

25. The structure of auxiliary locking device of a hinged door of claim 16, wherein the base plate 220 is provided with a locking piston through-hole 224 at a position corresponding to the provision position of the locking piston through-hole 212b of the lower connecting plate 212.

Description

DESCRIPTION OF DRAWINGS

[0043] FIG. 1A is a front view showing a hinged door installed in a door frame using a door hinge installed on one side of the door frame, FIG. 1B is a cross-sectional view taken along line a-a′ of FIG. 1A in a state of being locked by a general door handle, and FIG. 1C is a cross-sectional view taken along line a-a′ of FIG. 1A in a state of being unlocked by a door handle.

[0044] FIG. 2A is a front view showing a state in which a locking device of a hinged door according to the present invention is installed between a door frame and a rotating opening side of the hinged door installed in the door frame using a door hinged installed on one side of the door frame, FIG. 2B is a cross-sectional view taken along line a-a′ of FIG. 2A in a locked state, and FIG. 2C is a cross-sectional view taken along line b-b′ of FIG. 2A in a uncompressed/locked state, and FIG. 2D is a cross-sectional view taken along line b-b′ of FIG. 2A in a compressed/locked state.

[0045] FIG. 3A is a view showing an operation state in which, when the locking device of a hinged door according to the present invention is installed on one side of the door frame, an operating plate with a pressure roll slides from a door frame side in a longitudinal direction by rotating a rotatable lever in a vertical direction so as to switch a uncompressed/locked state to a compressed/locked state, and FIG. 3B is a view showing an operation state in which a plurality of close contact guide plates, which are installed on a rotating opening side of the hinged door to be separated from each other in the longitudinal direction, are pulled toward the door frame side when the operation plate with the pressure roll shown in FIG. 3A slides from the door frame side in the longitudinal direction so as to switch from the uncompressed/locked state to the pressed/locked state.

[0046] FIGS. 4 to 8 are exploded perspective views showing processes of an operation state of the switching device, which is a switching device composing the locking device of a hinged door according to the present invention, installed on the door frame to switch a pressure roll between a contact-compressed state position with the close contact guide plate and a noncontact-uncompressed state position through a longitudinal movement displacement.

[0047] FIGS. 9A and 9B are views for explaining a problem that occurs when an auxiliary locking device for a hinged door according to the prior invention is installed on a hinged door having a multi-locking system.

[0048] FIG. 10A to 10C are cross-sectional views for explaining the improvement required when installing the auxiliary locking device for the hinged door according to the prior invention to the hinged door provided with the multi-locking system shown in FIG. 9A.

[0049] FIG. 11A to 11C are views showing a detailed configuration, an assembly state, and an operation state of a connecting plate, a base plate, and a cover plate constituting a preferred embodiment according to the present invention.

[0050] FIG. 12 is an operational state diagram including a state in which the cylinder pocket 1sa is installed in the pocket installation groove 233 of the cover plate 230.

[0051] FIG. 13 is an operation state diagram including a state in which the extended cover 240 is installed in the vertical direction of the cover plate 230.

[0052] FIG. 14 is a view showing the overall installation structure of a preferred embodiment according to the present invention, and FIG. 15A is a view showing a cross section taken along line A-A′ of FIG. 14 and FIG. 15B is a view showing a cross section taken along line B-B′ of FIG. 14.

[0053] FIG. 16 is an exploded perspective view of a preferred embodiment according to the present invention, and FIG. 17 is an operating state diagram showing the process of assembly and disassembly between the upper connecting plate 211 and the lower connecting plate 212 constituting the connecting plate in the preferred embodiment according to the present invention.

BEST MODE OF THE INVENTION

[0054] Hereinafter, embodiments that are easily performed by those skilled in the art will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention may be achieved in several different forms and are not limited to the embodiments described herein.

MODES OF THE INVENTION

[0055] According to the present invention, as an opening and closing device for a hinged door installed on a door frame using a door hinge 1b installed on one side of a door frame 1a, there is provided an installation structure of an auxiliary locking device for a hinged door additionally provided in order to realize a close contact state to a door frame 1a of a hinged door 1 provided with two or more locking tools ‘1h, 1s, 1sa’, ‘1ph, 1p, 1pv’ as a main locking device for security, as shown in FIG. 9A to 10C, an example of an auxiliary locking device to which the present invention is applied, comprises;

[0056] a plurality of close contact guide plates 130 that are installed longitudinally and spaced apart from the rotating opening side of the hinged door 1;

[0057] a plurality of pressure rolls 120 provided longitudinally spaced apart from the door frame 1a side so that in a state in which the rotating opening side of the hinged door 1 is closed on the door frame 1a side, in a contact state with the close contact guide plates 130, the rotating opening side of the hinged door 1 is pulled toward the door frame 1a side, thereby implementing a compressed locked state, and so that in a non-contact state with the close contact guide plates 130, an uncompressed locked state of the rotating opening side of the hinged door 1 against the door frame 1a side is implemented;

[0058] a driving plate 110 installed in a sliding pocket 110a provided in a longitudinal direction on the door frame side so that the pressure rolls 120 can be installed to be slidably movable in a longitudinal direction from the side of the door frame 1a, and provided so that the pressure rolls 120 are spaced apart in the longitudinal direction on the front side; and

[0059] a switching device 100 installed in the door frame 1a so that the second pressure roll 120b switches between a contact compressed state position with the close contact guide plate 130 and a non-contact uncompressed state position through a longitudinal movement displacement, so that can induce a corresponding longitudinal movement displacement of the driving plate 110 by providing a longitudinal movement displacement by engaging with at least one first pressure roll 120a among the pressure rolls 120 installed on the driving plate 110, and so that can generate the longitudinal movement displacement of the remaining second pressure roll 120b induced by the longitudinal movement displacement of the drive plate 110;

[0060] wherein, an auxiliary locking device installation structure for a hinged door in which the auxiliary locking device is installed between the rotating opening side of the hinged door and the door frame side, as shown in FIG. 11A to 16, is characterized in that,

[0061] as an opening and closing device for a hinged door 1, the driving plate 110: 110{circle around (1)}, 110{circle around (2)} is respectively disposed in the upper section and in the lower section of the area in which the first locking tool 1h, 1s, 1sa and the second locking tool 1ph, 1p, 1pv are installed, which are provided as the main locking device for security between the rotating opening side of the hinged door 1 and the door frame 1a side, and sliding pockets 110a at the upper and lower portions are installed separately in the longitudinal direction on the side of the door frame 1a in order to accommodate the driving plates, respectively,

[0062] a connecting plate 210 is provided as a connecting means installed so as to reciprocate between the upper and lower sliding pockets 110a and interconnect the upper and lower drive plates 110{circle around (1)}, 110{circle around (2)} that are separately installed up and down, wherein the connecting plate 210 comprising an upper connecting plate 211 connected to the lower end of the upper driving plate 110{circle around (1)}, and a lower connecting plate 212 connected to the upper end of the lower driving plate 110{circle around (2)} and connected so that the upper connecting plate 211 is not separated in the longitudinal direction but can be separated only in the front-rear direction,

[0063] a base plate 220 is provided, wherein the base plate 220 being installed between the upper and lower sliding pockets 110a separated and separated to each other to support the bottom surface of the connecting plate 210 and to guide the vertical movement of the connecting plate 210, and

[0064] a cover plate 230 is provided on an upper surface of the base plate 220 to be spaced apart from each other by a height exceeding the thickness of the connecting plate 210 in order to form an operating space allowing the connecting plate 210 to move in the longitudinal direction,

[0065] wherein a pocket installation groove 233 in which a cylinder pocket 1sa accommodating a locking cylinder is constituting the first locking tool is installed is provided on the upper surface of the cover plate 230, and

[0066] wherein the cover plate 230 and the connecting plate 210 are provided with locking piston through holes 234, 212b, respectively, so that the lateral operating range of the locking piston 1p constituting the second locking tool can reach the base plate region.

[0067] Hereinafter, a detailed configuration and operation process of a preferred embodiment of the present invention will be described in more detail through the accompanying drawings.

[0068] FIG. 11A to 11C are detailed configurations of the connecting plate 210, the base plate 220, and the cover plate 230 constituting a preferred embodiment according to the present invention, as well as an assembly state and an operating state (up and down movement state, UP & DOWN). First, as shown in FIG. 11A, the connecting plate 210 is installed to interconnect the upper driving plate 110{circle around (1)} and the lower driving plate 110{circle around (2)} which are separately installed up and down, and comprises an upper connecting plate 211 having a connecting pin 211c inserted into a connecting hole 112, a connecting pin 212c inserted and connected to the connecting hole 112 formed at the upper end of the lower driving plate 110{circle around (2)}, and the lower connecting plate 212 which is connected to the upper connecting plate 211 so as not to be separated in the longitudinal direction but only in the front-rear direction (refer to FIG. 17) from the upper connecting plate 211.

[0069] The connection state of the upper connecting plate 211 and the lower connecting plate 212 can be achieved by a fastening structure of the front and rear fitting method between a male fastener 211a of the lower end of the upper connecting plate 211 and a female fastener 212a of the lower connecting plate 212.

[0070] On the other hand, a fastening piece through-hole 211b is provided at a predetermined central position of the upper connecting plate 211, and a detailed structure and operation thereof will be described later. In addition, a locking piston through-hole 212b is provided at a predetermined central position of the lower connecting plate 212.

[0071] And, between the upper and lower sliding pockets 110a separated by spaced apart in the vertical direction in a corresponding region facing the locking cylinder is constituting the first locking tool and the locking piston 1p constituting the second locking tool, as shown in FIG. 11B, a base plate 220 is installed to support the bottom surface of the connecting plate 210 so as to guide the vertical movement of the connecting plate 210.

[0072] In addition, in order to form an operating space that enables the longitudinal movement of the connecting plate 210, as illustrated in the accompanying drawings FIG. 11c, the cover plate 230 is installed by being spaced apart from the upper surface of the base plate 220 by a height h1 or more (See FIG. 15B) that exceeds the thickness t1 of the connecting plate 210. In this way, the structure in which the cover plate 230 is spaced apart from the base plate 220 shown in FIG. 14, FIG. 15B showing a cross section taken along line B-B′ of FIG. 14, and FIG. 16, could be implemented through a spacer 222 provided to support a portion of the upper surface of the base plate 220 and a portion of the bottom surface of the cover plate 230. Here, as illustrated in FIG. 15B, the spacer 222 may be integrally protruded from the upper surface of the base plate 220, or alternatively, may be integrally protruded from the lower surface of the cover plate 230. In addition, a mounting groove 232 may be additionally provided on the corresponding surface (e.g. the lower surface of the cover plate 230 in FIGS. 11C and 15B) of the protrusion of the spacer 222.

[0073] In addition, a pocket installation groove 233 in which a cylinder pocket 1sa for accommodating the locking cylinder is constituting the first locking tool is fixedly installed is provided on the upper surface of the cover plate 230, and a locking piston through-hole 234 is also provided in the cover plate 230 at a position corresponding to the formation position of the locking piston through-hole 212b of the lower connecting plate 212 so that the lateral operating range of the locking piston 1p constituting the second locking tool can reach the base plate 220 region.

[0074] Further, the base plate 220 may also be provided with a locking piston through-hole 224 at a position corresponding to the provision position of the locking piston through-hole 212b of the lower connecting plate 212, whereby it is possible to achieve a more stable security structure by allowing the locking piston 1p constituting the second locking tool to be closer to the door frame 1a.

[0075] According to a preferred embodiment of the present invention, as shown in FIG. 12 and in the side view and enlarged cross-sectional view of the main part, the cylinder pocket 1sa (also marked with the drawing number ‘250’) is installed in the pocket installation groove 233 of the cover plate 230 after finding an appropriate location. For such function of adjusting the installation position of the cylinder pocket, a micro protrusion groove structure for determining the installation position is provided at the center of the pocket installation groove 233 of the cover plate 230, and a micro protrusion groove 252 structure for determining the installation position having a shape corresponding to the micro protrusion groove structure of the pocket installation groove 233 is provided at the bottom of the cylinder pocket 250. For the fixed installation of the cylinder pocket 250, fastening holes through which the fastening pieces fs2 are fastened are formed in the upper and lower portions of the pocket installation grooves 233. In addition, a through long hole 254 having a long hole shape is provided in the upper and lower portions of the cover plate 230 so that the fastening piece fs2 can be penetrated in a state where the through position is changed.

[0076] And, according to one embodiment of the present invention shown in FIGS. 12 and 13, the extension cover 240 is installed in the vertical direction of the cover plate 230 to provide a good finish in appearance.

[0077] FIG. 12 shows a state in which the cylinder pocket 250 is installed in the pocket installation groove 233 of the cover plate 230 and is fixed by the fastening piece fs2, but FIGS. 13 and 15A (cross-sectional view along A-A′ line of FIG. 14) show a structure in which the cover plate 230 is rigidly fixed to the door frame 1a by a fastening piece fs1 penetrating the cover plate 230 and the base plate 220. In this way, so that the movement of the connecting plate 210 in the vertical direction is not disturbed by the fastening piece fs1 that is fastened through the cover plate 230 and the base plate 220, a fastening piece through-hole 211b having a long hole shape (up and down movement range length of a long hole) is provided at a predetermined central position of the upper connecting plate 211.

[0078] FIG. 14 shows the overall installation structure of a preferred embodiment according to the present invention, and the locking piston through-hole 234 of the cover plate 230, which is provided so that the lateral operating range of the locking piston 1p constituting the second locking tool described above can reach the base plate 220 region. The through-fastening operation state of the locking piston 1p is confirmed through FIG. 15A showing a cross section taken along line A-A′ of FIG. 14 and FIG. 16 showing an exploded state of a preferred embodiment according to the present invention.

[0079] According to a preferred embodiment of the present invention, as described above, the upper connecting plate 211 connected to the lower end of the upper driving plate 110{circle around (1)} and the lower connecting plate 212 connected to the upper end of the lower driving plate 110{circle around (2)} have a structure that is connected so that it is not separated from each other in the vertical direction but can be separated only in the front and rear directions. In the case of using an integrated connecting plate between the lower end of the upper drive plate 110{circle around (1)} and the upper end of the lower drive plate 110{circle around (2)} with a certain distance, this separation structure in the front-rear direction was adopted so that it can be separated only in the front and rear directions in consideration of the difficulty of performing interconnection work of integrated plate at the door installation construction site.

[0080] For example, as shown in the FIG. 17 (upper assembly; lower disassembly), looking at the disassembly process of the lower connecting plate 212 connected to the upper end of the lower driving plate 110{circle around (2)}, by moving the upper connecting plate 211 and the lower connecting plate 212 constituting the connecting plate 210 in either direction (upward movement in the drawing), by separating the fitting state of the mail fastener 211a of the lower end of the upper connecting plate 211 and the female fastener 212a of the lower connecting plate 212 constituting the interconnection in the front and rear directions (Raising the front of the female fastener 212a of the lower connecting plate 212), the rearward movement of the connection pin 212c at the lower end of the lower connecting plate 212 is induced in the other direction. Thereby, the connection pin 212c at the lower end of the lower connecting plate 212 is removed from the connection hole 112 formed at the upper end of the lower driving plate 110{circle around (2)} so that the disassembly operation of the lower connecting plate 212 is completed. At this time, the rearward movement of the connection pin 212c at the lower end of the lower connecting plate 212 is more easily performed through a free space provided by the locking piston through-hole 224 of the base plate 220. This makes it possible to carry out the sequential disassembly of the remaining parts, and the assembly can be carried out simply by an operation in the opposite direction to the disassembly described previously.

[0081] In the above, while describing in detail a preferred embodiment of the present invention, directional terms “upward” and “downward” have been used in describing the operating directions of the upper driving plate 110{circle around (1)} and the lower driving plate 110{circle around (2)}, but it is assumed that the device according to the present invention is installed in the door frame in the direction shown in the drawings. When the locking device according to the present invention is installed in a different direction, upward and downward directions may be reversed, or the direction may be leftward and rightward directions. Therefore, it should be understood that the directional terms are not to be construed as limiting the scope of the present invention, and various modifications and improvements by those skilled in the art using the basic concept of the present invention defined in the following claims are also within the scope of the present invention.