Door locking apparatus

Abstract

The present invention relates to a door locking apparatus in which an angular rod (20) constituting the locking apparatus has, at the end portion thereof, a curved arc-shaped plate (23) and a vertical restraining plate (25) orthogonal to the arc-shaped plate (23), and a recess (33) having a shape that matches the arc-shaped plate (23) and the restraining plate (25) is formed under a door, so that when the angular rod (20) reaches the recess (33) during the rotation of the door (10), the arc-shaped plate (23) and the restraining plate (25) are inserted into the recess (33) to fix the door (10). According to the present invention, when the locking apparatus for a door such as a fire door is used, the door (10) can freely rotate without an unlocking operation by a user while the door (10) is open, and once the angular rod (20) constituting the locking apparatus couples to the recess (33), the restraining plate (25) prevents the separation of the angular rod (20) from the recess (33) so that the locked state of the door (10) can be stably maintained.

Description

Door fixing device

[0001] The present invention relates to a door fixing device, wherein a curved arc-shaped plate (23) and a restraining plate (25) perpendicular to the arc-shaped plate (23) are formed at the end of a square rod (20) constituting the fixing device, and a recessed portion (33) having a shape matching the arc-shaped plate (23) and the restraining plate (25) is formed at the bottom of the door, so that when the square rod (20) reaches the recessed portion (33) during the rotation process of the door (10), the arc-shaped plate (23) and the restraining plate (25) are inserted into the recessed portion (33) and the door (10) is fixed, and the restraining plate (25) suppresses the phenomenon in which the curved surface of the arc-shaped plate (23) goes over the outer edge of the recessed portion (33).

[0002] It is common for doors, such as fire doors, to be equipped with a bolt-type fixing device that fixes the open / closed state of the door leaf, and related prior art can be cited as Patent No. 1231453, etc.

[0003] Conventional door fixing devices, including Patent No. 1231453, are equipped with a rod that protrudes outwardly from the bottom or top of the door, and an insertion part into which the rod is inserted is formed in the floor or ceiling of the building at the door installation point. When the rod is inserted into the insertion part, the door is fixed, and when the rod is pulled out from the insertion part, the door is released from fixation, allowing for free rotational opening and closing.

[0004] In other words, since it is absolutely necessary to manually raise or lower the rod to set the rotational or fixed state of the door, it is fundamentally impossible to operate in a manner where free rotation is possible without manipulating the rod when the door is open, but the rod automatically extends to lock the door without separate operation once the rotating door reaches the fixed position.

[0005] Accordingly, a method could be considered in which an arc-shaped curved surface is formed at the end of the rod and an elastic element is installed between the rod and the door body to ensure that a constant elastic force acts to protrude the rod outward; however, in this case, the curved surface of the rod slides over the outer edge of the insertion part in the direction in which the curve is formed, causing a problem in which the rod easily detaches from the insertion part.

[0006] Therefore, in the case of doors where a curved rod is applied as a locking device, there was a problem in that a door frame with a ledge formed to suppress unnecessary rotation of the door had to be applied.

[0007] In particular, as doors without lower frames are frequently used recently for both mobility convenience and interior aesthetics, there is an urgent need for a locking device that incorporates a curved body while suppressing unnecessary rotational movement of the door.

[0008] The present invention is conceived in consideration of the aforementioned problems and is a door fixing device characterized in that, in a door fixing device, a square bar (20) is installed so as to be vertically movable at the bottom of a door (10), a spring (17) is installed in the square bar (20) so that a downward elastic force is constantly applied to the square bar (20), an arc-shaped plate (23) with an arc-shaped curved surface is formed at the end of the square bar (20), a restraining plate (25) perpendicular to the arc-shaped plate (23) is formed, and a recessed portion (33) with a shape matching the arc-shaped plate (23) and the restraining plate (25) is formed on the bottom, and the arc-shaped plate (23) and the restraining plate (25) of the square bar (20) are inserted into the recessed portion (33) to fix the door (10).

[0009] Through the present invention, when using a fixing device for an entrance door such as a fire door, the door (10) can be freely rotated without the user's operation to unlock the door, and once the square rod (20) constituting the fixing device is coupled to the recessed portion (33), the restraining plate (25) prevents the square rod (20) from detaching from the recessed portion (33), thereby allowing the fixed state of the door (10) to be stably maintained.

[0010] In particular, even on a flat floor without a door frame, stable fixation and smooth movement of the door (10) are possible, ensuring convenience of movement and allowing for free arrangement of the indoor space.

[0011] FIG. 1 is a plan view of various types of doors to which the present invention can be applied.

[0012] FIG. 2 is a representative cross-sectional view of the lower part of a door to which the present invention is applied.

[0013] FIG. 3 is a bottom perspective view of an excerpt of the angle bar of the present invention.

[0014] FIG. 4 is an excerpted perspective view of the square rod and the recessed part of the present invention.

[0015] FIG. 5 is an explanatory diagram of the state in which the present invention is applied to a flat floor without a door frame.

[0016] FIG. 6 is an explanatory diagram of the state in which the present invention is applied to a floor with a step difference.

[0017] FIG. 7 is a perspective view of an embodiment of the present invention to which a T-shaped square bar is applied.

[0018] FIG. 8 is a perspective view of an embodiment of the present invention to which a U-shaped square bar is applied.

[0019] <Explanation of Symbols>

[0020] 10 : Door

[0021] 15 : Towing means

[0022] 17 : Spring

[0023] 20 : Each bar

[0024] 23 : Arch-shaped plate

[0025] 25 : Forced judgment

[0026] 33 : Recess

[0027] The detailed configuration of the present invention will be explained with reference to the attached drawings as follows.

[0028] First, FIG. 1 illustrates a plan view of various doors to which the present invention can be applied. As shown in the figure, the present invention can be applied to various types of doors, such as double doors or folding doors, as well as general hinged doors in which various hinges are installed at one end of the door leaf (10).

[0029] FIG. 2 is a cross-sectional view along line A-A' of FIG. 1, that is, a representative cross-sectional view of the lower part of the door (10) to which the present invention is applied. As shown, the present invention can be described as a door fixing device that fixes the door (10) to the floor or ceiling through a means in the form of a bolt. FIG. 2 shows the lower part of the door (10) to which the present invention is mainly applied and the floor at the installation point of the door (10), but a fixing device of the same structure can also be installed on the upper part of the door (10), which is omitted in FIG. 2.

[0030] As shown in FIG. 2, a rectangular bar (20) with a flat cross-section is installed at the bottom of the door (10) so as to be vertically movable, and a spring (17) is installed at the top of the bar (20) so that a downward elastic force is constantly applied to the bar (20).

[0031] That is, the square rod (20) of the present invention is a locking or fixing device that is installed to be protruding and retractable by being embedded in the door leaf (10) of an entrance door, such as a fire door, and, as in other fixing devices, a traction means (15) capable of artificially raising the square rod (20) is embedded in the door leaf (10), and a spring (17) is installed to constantly protrude the square rod (20) downward to the outside of the door leaf (10), so that when the upward traction of the square rod (20) is released and the free state, the square rod (20) constantly protrudes to the outside of the door leaf (10).

[0032] However, the operation of retracting the square rod (20) into the inner side of the door (10) to release the fixed state of the door (10) can be performed by the user's operation. As shown in FIG. 2, a pulling means (15) connected to the upper part of the square rod (20) is configured to pull the square rod (20) into the inner side of the door (10) on the upper side of the drawing, so that the square rod (20) is moved into the inner side of the door (10) according to the user's operation.

[0033] In the embodiment illustrated in FIG. 2, a link connected to the side end of a diamond-shaped rotating body is applied as a traction means (15), and as the user rotates the rotating body, the link-type traction means (15) pulls the rod (20), causing the rod (20) to overcome the elastic force of the spring (17) and move into the door (10). However, in addition to this rotating body, various types of traction means (15), such as a lifting lever, may also be applied.

[0034] As shown in FIG. 3, an arc-shaped plate (23) with an arc-shaped curved surface is formed at the lower end of the angle bar (20), so that the shape of the angle bar (20) gradually decreases downward, and the planar width of the arc-shaped plate (23) is formed to be less than the planar width of the angle bar (20), and a restraining plate (25) perpendicular to the arc-shaped plate (23) is formed vertically, so that the planar cross-section of the angle bar (20) at the point where the arc-shaped plate (23) and restraining plate (25) are formed has an L-shape.

[0035] In addition, as shown in FIGS. 2 and 4, a recessed portion (33) having a flat cross-section that matches the flat cross-section of the arc-shaped plate (23) and the restraining plate (25) is formed by being recessed downwardly on the lower bottom of the door (10). When the square rod (20) reaches the upper part of the recessed portion (33) during the rotation process of the door (10), the arc-shaped plate (23) and the restraining plate (25) of the square rod (20) are inserted into the recessed portion (33) by the elastic force of the spring (17), thereby fixing the door (10).

[0036] FIG. 5 illustrates the rotational movement and locking state of the door (10) through the square rod (20) and the recess (33) of the present invention, illustrating a structure in which a flat floor is formed around the door by omitting the floor door frame. As shown in the left and right ends of the figure, before the door (10) reaches the recess (33), the door (10) can move freely regardless of the direction of movement during rotation on the plane and subsequent horizontal movement on the figure. When the door (10) reaches the upper part of the recess (33), the square rod (20) protrudes downward, and the door (10) is finally fixed to the floor.

[0037] As can be seen through FIG. 5, the door (10) to which the present invention is applied can be stably fixed to the point where the recess (33) of the floor is formed, even if the floor door frame is omitted and a completely flat floor surface is formed in the periphery.

[0038] In particular, as shown in the central part of FIG. 5, once the square rod (20) is inserted into the recess (33), the curved surface of the arc plate (23) runs over the outer edge of the recess (33), and the square rod (20) is prevented from coming out of the recess (33) through the connection of the restraining plate (25) and the recess (33), thereby preventing unnecessary movement of the door (10) and ensuring stable fixation.

[0039] In addition, in addition to the door frame omission structure as shown in FIGS. 2 and 5, smooth operation and fixation are also possible in special structures where a step is created in the floor as shown in FIG. 6.

[0040] The square bar (20) of the present invention can be modified in various ways as shown in FIGS. 7 and FIGS. 8 while maintaining the basic configuration of a curved arc plate (23) and an arc plate (23) orthogonal restraint plate (25). FIGS. 7 is an embodiment in which the arc plate (23) and the restraint plate (25) are joined to form a T-shaped cross-section, and FIGS. 8 is an embodiment in which the arc plate (23) is joined to each end of the restraint plate (25) so that the overall shape of the square bar (20) forms a U-shape.

[0041] In this way, through various shape changes of the square bar (20), various additional functions such as strength reinforcement and balance can be provided while maintaining the smooth movement and stable fixing function of the square bar (20) of the present invention.

[0042] The door fixing device according to an embodiment of the present invention can be used to enable stable fixing of the door leaf and smooth movement even on a flat floor without a door frame, to ensure convenience of movement, and to enable free arrangement of the indoor space.

Claims

1. In a door fixing device, A square bar (20) is installed at the bottom of the door (10) so as to be able to move up and down, and a spring (17) is installed on the square bar (20) so that a downward elastic force is constantly applied to the square bar (20); An arc-shaped plate (23) and a restraining plate (25) are formed at the end portion of each bar (20), wherein an arc-shaped curved surface is formed on the arc-shaped plate (23) and the restraining plate (25) is perpendicular to the arc-shaped plate (23); A door fixing device characterized by having a recessed portion (33) formed on the bottom that matches the shape of the arc plate (23) and the restraining plate (25), and the arc plate (23) and the restraining plate (25) of the square bar (20) being inserted into the recessed portion (33) to fix the door leaf (10).

Images