Patent Application
20200040610
The present invention relates to a locking device of a hinged door, and more specifically, to a locking device of a hinged door which allows a rotation-opening side of the hinged door to be pressed against a door frame at a plurality of points in a longitudinal direction by operating a rotatable lever installed on a door frame separately from a generally used main locking device for security, and more easily maintains a fixed state in a compressed-contact state, and is used as an auxiliary locking device of the hinged door.
Doors for a building entrance with a hinged door structure and various hinged doors installed indoor (referred to as the hinged door in the specification, including a hinged door for entrance and a hinged window) use various locking devices. As a general prior art of the locking device of a hinged door and a hinged window, locking devices with various structures, such as “Locking Device of Hinged Door” in Korean Registration Patent (B1) No. 10-1237681 (Feb. 26, 2013), “Locking Device of Hinged Door” in Korean Utility Model Registration (Y1) No. 20-0271060 (Apr. 9, 2002), and “Locking Device of Hook Direction Changing Type-Hinged Door” in Korean Utility Model Registration (Y1) No. 20-0476646 (Mar. 18, 2015), and the like, are disclosed. As shown in
However, since the conventional locking devices are used for security, the locking device only has a structure of maintaining a locked state in which a hinged door is locked on a door frame and performs a locking function at one point of the hinged door in a longitudinal direction of the hinged door as shown in
Further, use of various electronic opening and closing devices as the locking device of a hinged door has been increasing recently. In the case of the electronic opening and closing device (an electronic door lock), when the locked state is released due to external strong electric shock or password exposure, an intrusion path to go inside may be provided, and thus a separate locking device is further required.
The present invention is directed to providing a locking device of a hinged door capable of being used as an auxiliary locking device that allows a gap between the hinged door and a door frame to be controlled in order to provide a better airtight condition after the hinged door is closed and locked by a general locking device.
The present invention is directed to providing a locking device of a hinged door capable of being locked or opened by rotating a lever only from an indoor space divided by a hinged door in order to solve a security problem of a locking device generally used for a hinged door.
One aspect of the present invention provides a locking device of a hinged door installed between a rotation opening side of the hinged door, which is installed in a door frame using a door hinge installed on one side of the door frame, and a door frame, the locking device including a plurality of close contact guide plates installed on the rotation opening side of the hinged door to be separated from each other in a longitudinal direction; a plurality of pressure rolls configured to achieve a compressed locked state by pulling the rotation opening side of the hinged door toward the door frame while in contact with the close contact guide plates in a state in which the rotation opening side of the hinged door is closed on the door frame, and installed on the door frame to be separated from each other in the longitudinal direction to achieve the uncompressed locked state between the rotation opening side of the hinged door and the door frame in a noncontact state with the close contact guide plates; a driving plate installed in the sliding pocket, provided in the door frame in the longitudinal direction so that the pressure rolls 120 are slidably installed on the door frame in the longitudinal direction, and having the plurality of pressure rolls provided in the longitudinal direction; and a switching device configured to induce a longitudinal movement displacement corresponding to that of the driving plate by being engaged with at least one first pressure roll of the pressure rolls installed on the driving plate to provide the longitudinal movement displacement, configured to generate a longitudinal movement displacement of the second pressure roll induced by the longitudinal movement displacement of the driving plate, and installed on the door frame to allow the second pressure roll to be switched between a contact compressed state position with the close contact guide plates and the contact compressed state position by the longitudinal movement displacement, wherein the switching device includes a housing fixedly installed on the door frame, a rotatable lever installed in the housing by a first hinge pin to rotate on a front surface of the housing in the longitudinal direction, a conversion link bar having one end portion connected at a predetermined position between the first hinge pin of the rotatable lever and a rotation end portion, a sliding block connected to the other end portion of the conversion link bar by a third hinge pin to slide linearly in the housing in the longitudinal direction according to a longitudinal rotation operation of the rotatable lever, a cover plate configured to cover a rear surface of the housing to limit a displacement of the sliding block by a longitudinal rotation operation of the rotatable lever to a longitudinal linear sliding displacement in the housing and having a hole formed in the longitudinal direction to guide the longitudinal linear sliding displacement and having a size such as to limit the height of the longitudinal linear sliding displacement, and a slider fork integrated with the sliding block, provided to protrude to an outside of a sliding guide groove formed in the cover plate, and sliding along the sliding guide groove in the longitudinal direction while being engaged with the first pressure roll.
The switching device further includes a rotatable lever releasing blocking unit for blocking release of the rotatable lever before external force greater than a predetermined strength is applied to the rotatable lever to rotate the rotatable lever so as to maintain the second pressure roll to be fixed at a contact compressed state position with the close contact guide plates or a noncontact and uncompressed state position.
To provide a first rotatable lever releasing blocking unit which is one of the rotatable lever releasing blocking units, a neutral state in which the third hinge pin, the first hinge pin, and a second hinge pin are sequentially disposed on an upward inclined straight line is made while the rotatable lever composing the switching device rotates upward about the first hinge pin so that the second hinge pin is positioned above the first hinge pin, a sliding guide groove upper limit line U.L. is set at a position limiting a free further upward movement of the sliding block and the slider fork before the neutral state, additional upward movements of the sliding block and the slider fork are elastically received by elastic compression deformation of an upper region of the cover plate induced by an upward displacement exceeding the sliding guide groove upper limit line U.L. while the rotatable lever rotates upward to reach the neutral state, and the sliding block connected to the link bar and the slider fork are moved slightly downward by elastically pressed elastic recovery deformation of the upper region of the cover plate in a section in which the rotatable lever additionally rotates upward to reach the vertically upright state beyond the neutral state, and thus a position of a sliding guide groove upper limit line U.L. of the sliding guide groove is set to limit an reverse direction operation of the rotatable lever, the sliding block, and the slider fork integrated with the sliding block until external force strong enough to re-perform elastic compression deformation of the upper region of the cover plate is applied to the rotatable lever according to slight upward movements of the sliding block and the slider fork for recovering the slight downward movement.
To provide a second rotatable lever releasing blocking unit, which is another one of the rotatable lever releasing blocking units, the rotatable lever composing the switching device rotates downward about the first hinge pin to reach a vertically downward state so that the second hinge pin is positioned below the first hinge pin and a state in which the first hinge pin, the second hinge pin, and the third hinge pin are disposed downward sequentially in a triangular structure is made, a sliding guide groove lower limit line L.L. is set at a position limiting additional free downward movements of the sliding block and the slider fork before the vertically downward state, additional downward movements of the sliding block and the slider fork are elastically received through elastic compression deformation induced by a downward displacement exceeding the sliding guide groove lower limit line L.L. while the rotatable lever moves downward to reach the vertically downward state, a lever downward moving unit and a lever recovery unit are provided between the housing and the rotatable lever to induce a further slight downward movement and recovery of the rotatable lever while the rotatable lever rotates downward to reach the vertically downward state beyond the sliding guide groove lower limit line L.L. which limits free downward movements of the sliding block and the slider fork, and therefore reverse operations of the rotatable lever, the sliding block, and the slider fork integrated with the sliding block are limited until elastic compression deformation of the cover plate-lower region by forcible further slight downward movement of the rotatable lever is re-performed by the rotatable lever rotated from the lever recovery unit through the lever downward moving unit in a reverse direction.
The lever downward moving unit includes a catching protrusion protruding from a side wall of the housing, a catching projection provided in an entrance portion of the catching groove formed in a side surface of the rotatable lever to be concave to correspond to the catching protrusion, and a long hole portion, which is a hinge hole of the rotatable lever to which the first hinge pin is fastened to receive downward movement of the rotatable lever performed when the catching projection comes out of a lower end portion of the catching protrusion, includes a vertical hole for the first hinge, wherein the lever recovery unit includes a catching protrusion expanded mounting portion in the catching groove provided to receive elastic recovery deformation of the cover plate-lower region.
According to the present invention, the locking device can provide a better airtight condition and does not cause noise due to rattling of a hinged door even in strong winds by providing an auxiliary locking device for controlling a gap between a hinged door and a door frame so that the hinged door is closely pressed against the door frame at a plurality of points in a longitudinal direction after the hinged door is closed and locked by a general locking device.
Particularly, a rotatable lever releasing blocking unit for blocking release of the rotatable lever before external force greater than a predetermined strength is applied to the rotatable lever to rotate the rotatable lever is additionally provided, and thus an effect of maintaining a second pressure roll of a switching device to be fixed at a contact compressed state position with the close contact guide plates or a noncontact and uncompressed state position can be provided.
Further, according to the present invention, a security problem of an electronic locking device generally used for a hinged door can be solved by an auxiliary locking device that allows locking or opening only by rotating a lever from an indoor space divided by a hinged door.
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.
According to the present invention, a locking device is, as shown in
In this case, the switching device 100 includes a housing 10 fixedly installed on the door frame 1a, a rotatable lever 30 installed in the housing 10 by a first hinge pin 32 to be rotated on a front surface of the housing in the longitudinal direction, a conversion link bar 40 having one end portion connected at a predetermined position between a first hinge pin 32 of the rotatable lever 30 and a rotating end portion by a second hinge pin 40a, a sliding block 20 connected to the other end portion of the conversion link bar 40 by a third hinge pin 40b and sliding linearly in the housing 10 in the longitudinal direction according to a longitudinal rotation operation of the rotatable lever 30, a cover plate 50 for covering a rear surface of the housing 10 to limit a displacement of the sliding block 20 caused by the longitudinal rotation operation of the rotatable lever 30 to a longitudinal linear sliding displacement in the housing 10 and including a sliding guide groove 52 for guiding the longitudinal linear sliding displacement and having a hole formed in the longitudinal direction in a size limiting the height of the sliding displacement, and a slider fork 25 integrated with the sliding block 20, protruding to the outside of the sliding guide groove 52 formed in the cover plate 50, and sliding along the sliding guide groove 52 in the longitudinal direction while being engaged with the first pressure roll 120a.
In this case, unlike the second pressure roll 120b, the first pressure roll 120a is an element engaged with the slider fork 25, not an element which is in contact with the close contact guide plates 130, and thus the name of the element may vary, but functions of the first pressure roll 120a and the second pressure roll 120b of the plurality of pressure rolls 120 may be changed when an installation position of the switching device 100 installed in the door frame 1a is changed, and thus a unified name is used in the present specification, and the pressure rolls 120 may be a cylindrical roller having a touched outer circumferential surface freely rotating about a central portion so that excessive frictional force or frictional noise is not generated in a process of being engaged with the slider fork 25 or in a process of moving while in contact with the close contact guide plate 130.
Further, a rotatable lever releasing blocking unit for blocking a releasing operation of the rotatable lever 30 to rotate the rotatable lever 30 before external force greater than a predetermined strength is applied to the rotatable lever 30 may be additionally provided in the switching device 100 in order for the second pressure roll 120b to maintain a fixed state at a contact compressed state position with the close contact guide plate 130 or a noncontact-uncompressed state position.
In this case, to provide the rotatable lever releasing blocking unit, which is one of the rotatable lever releasing blocking unit, while the rotatable lever 30 composing the switching device 100 rotates upward about the first hinge pin 32 so that the second hinge pin 40a is positioned above the first hinge pin 32, the third hinge pin 40b, the first hinge pin 32, and the second hinge pin 40a are sequentially disposed in a neutral state N.A. to be disposed in a straight line inclined upward, and a sliding guide groove upper limit line U.L. is set at a position limiting the additional free upward movements of the sliding block 20 and the slider fork 25 before the neutral state N.A. A further upward movement of the sliding block and the slider fork are elastically received by elastic compression deformation of an upper region 50b of the cover plate 50 induced by an upward displacement exceeding an upper line of the sliding guide groove while the rotatable lever 30 rotates upward to reach the neutral state N.A., and the sliding block 20 and the slider fork 25 connected to the link bar 40 are moved slightly downward using the third hinge pin 40b by elastic recovery deformation of the upper region 50b of the elastically pressed cover plate 50 in a section in which the rotatable lever is additionally rotated upward to a vertically upright state beyond the neutral state. A sliding guide groove upper limit line U.L. position of the sliding guide groove 52 may be set to limit a reverse operation (downward rotation and downward movement) of the rotatable lever 30, the sliding block 20, and the slider fork 25 integrated with the sliding block 20 until external force strong enough for elastic compression deformation of the upper region 50b of the cover plate 50 to be re-performed according to slight upward movement of the sliding block and the slider fork for recovering slight downward movement is applied to the rotatable lever 30.
Further, to provide a second rotatable lever releasing blocking unit, which is another one of the rotatable lever releasing blocking units, while the rotatable lever 30 composing the switching device 100 rotates downward about the first hinge pin 32 to a vertically downward state so that the second hinge pin 40a is positioned below the first hinge pin 32, the first hinge pin 32, the second hinge pin 40a, and the third hinge pin 40b are disposed downward sequentially in a triangular structure, and a sliding guide groove lower limit line L.L. is set at a position limiting additional free upward moving of the sliding block 20 and the slider fork 25 before the vertically downward state. A further downward movement of the sliding block 20 and the slider fork 25 are elastically received by elastic compression deformation of the lower region 50a of the cover plate 50 induced by an upward displacement exceeding the sliding guide groove lower limit line L.L. while the rotatable lever 30 rotates downward to reach the vertically downward state, and a lever downward moving unit and a lever recovery unit may be provided between the housing and the rotatable lever to induce forcible further slight downward movement and recovery of the rotatable lever 30 in a downward rotation section until the rotatable lever 30 reaches the vertically downward state beyond the sliding guide groove lower limit line L.L. state in which free downward movement of the sliding block 20 and the slider fork 25 is limited, and therefore, a reverse operation (upwardly rotating and upwardly moving) of the rotatable lever 30, the sliding block 20, and the slider fork 25 integrated with the sliding block 20 is limited until elastic compression deformation of the cover plate-lower region 50a is re-performed by the forcible further slight downward movement of the rotatable lever 30 by the rotatable lever 30 rotated from the lever recovery unit through the lever downward moving unit in a reverse direction.
In this case, the lever downward moving unit includes a catching protrusion 10s protruding from a side wall of the housing 10, a catching projection 30sa formed on a side surface of the rotatable lever 30 to be concave to correspond to the catching protrusion 10s, and a long hole portion 30e which is a hinge hole of the rotatable lever 30 to which the first hinge pin 32 is fastened to allow the rotatable lever 30 to move downward when the catching projection 30sa comes out of a lower end portion of the catching protrusion 10s and includes a vertical gap for the first hinge pin 32, and the lever recovery unit includes a catching protrusion expanded mounting portion 30se formed in the catching groove 30s to receive elastic recovery deformation of the cover plate-lower region 50a.
Hereinafter, detailed configurations and operation processes of the embodiments of the present invention will be described in more detail with reference to the accompanying drawings.
As shown in
As shown in a perspective view for the door frame of
Therefore, as shown in
Hereinafter, in the switching device composing the locking device of the hinged door according to the embodiments of the present invention, an operation state of the switching device 100 for switching between the contact compressed state position with the close contact guide plates 130 and the noncontact uncompressed state position by the longitudinal movement displacement of the second pressure roll 120b will be described in more detail with reference to cross-sectional views of processes of the operation states shown in
Further, according to one exemplary embodiment of the present invention, a unit for maintaining the second pressure roll 120b to be fixed to the contact compressed state position (for example, a uppermost rotated state) with the close contact guide plates 130 or a noncontact uncompressed state position (for example, a lowermost rotated state) is required. For example, a rotatable lever releasing blocking unit for blocking release of the rotatable lever 30 before external force greater than a predetermined strength is applied to the rotatable lever 30 to rotate the rotatable lever 30 in a reverse direction while in the lowermost rotated state (−90° from a horizontal surface) and the uppermost rotated state (+90° from a horizontal surface, see
In this case, according to one exemplary embodiment of the present invention, the first rotation lever releasing blocking unit, which is one of the rotatable lever releasing blocking units, is provided to maintain the uppermost rotated state (a position (b) of
That is, in a state in which the sliding block 20 and the slider fork 25 are in an upwardly fixed state (a contact compressed state, a compressed/locked state), to release the state in which the sliding block 20 and the slider fork 25 are in an upwardly fixed state by a reverse operation of the rotatable lever 30, the reverse strong external force F is applied to the rotatable lever 30 as shown in
Further, a sliding guide groove upper limit line U.L. of the sliding guide groove 52 is set at a predetermined position of the upper region 50b of the cover plate 50 made of the elastic material, and the appropriate strength of the external force required for locking or unlocking to be applied to the rotatable lever 30 is set, and thus the first rotatable lever releasing blocking unit is provided.
Meanwhile, the rotatable lever releasing blocking unit is required even in a section in which the rotatable lever 30 rotates about the first hinge pin 32 downward to reach a vertically downward state, as shown in
To solve the problem, in the exemplary embodiment of the present invention, a lowermost rotated state of the second rotatable lever releasing blocking unit, which is another one of the rotatable lever releasing blocking units, is provided to maintain a lowermost rotated state (a low position state—a position (a) of
In this case, as described above, the lever downward moving unit includes a catching protrusion 10s protruding from a side wall of the housing 10, a catching projection 30sa provided on an entrance portion of the catching groove 30s formed on a side surface of the rotatable lever 30 to be concave to correspond to the catching protrusion 10s, and a long hole portion 30e, which is a hinge hole of the rotatable lever 30 to which the first hinge pin 32 is fastened to receive downward movement of the rotatable lever 30 performed when the catching projection 30sa comes out of a lower end portion of the catching protrusion 10s, including a vertical gap Δr for the first hinge pin 32, and the lever recovery unit includes a catching protrusion expanded mounting portion 30se provided in the catching groove 30s to receive elastic recovery deformation of the cover plate-lower region 50a.
In this case, the vertical gap Δr of the long hole portion 30e may be greater than a height Δs of the catching projection 30sa (see
Hereinafter, specific operation processes of the lever downward moving unit and the lever recovery unit will be described in more detail with reference to
As shown in
While in a section in which the rotatable lever 30 rotates downward to reach the vertical lower state beyond the sliding guide groove lower limit line L.L. limiting free downward movement of the sliding block 20 and the slider fork 25 (see
Accordingly, the first hinge pin 32 additionally and forcibly moves downward by a height (As) of the protrusion of the catching projection 30sa determining a catching state with the lower end portion of the catching protrusion 10s protruding from a side wall of the housing 10, and in this case, the first hinge pin 32 moves while the upper gap 30e1 of the long hole portion 30e of the hinge hole is decreased (0.4→0.208 mm), the lower gap 30e2 is increased (0→0.192 mm), and the additional slight downward movement of the first hinge pin 32 induces the sliding block 20 and the slider fork 25 connected through the conversion link bar 40 connected through the second hinge pin 40a and the third hinge pin 40b connected with the other end of the conversion link bar 40 to be moved slightly further downward by additional elastic compression deformation of the lower region 50a of the cover plate 50 (‘0.657 mm’ deformation of
When the rotation of the rotatable lever 30 is finished in the additional elastic compression state, the state becomes a unstable state due to elastic force (elastic force causing elastic recovery deformation) of the lower region 50a of the cover plate 50, and the lever recovery unit is provided to remove an unstable factor and maintain a stable fixed state. When the rotatable lever 30 moves slightly further downward from the above-described slight downward movement to be disposed in a downward fixed state of −90°, the catching protrusion 10s is mounted on the catching protrusion expanded mounting portion 30se through the an entrance portion for the catching groove 30s of the rotatable lever 30 to allow the catching projection 30sa with a height of Δs and a lower end portion of the catching protrusion 10s to be caught by elastic recovery deformation (0.657→0.5 mm) of the lower region 50a of the cover plate, and during the recovery, the first hinge pin 32 may move in the long hole portion 30e of the hinge hole upward (upward movement of the lever, that is, recovery movement of the lever) while the upper gap 30e1 of the long hole portion 30e of the hinge hole is re-increased (0.208→0.4 mm) and the lower gap 30e2 is re-decreased (0.192→0 mm).
Therefore, as shown in
Both end portions of the conversion link bar 40 provided as an element of the switching device 100 are coupled to the rotatable lever 30 and the sliding block 20 through the second hinge pin 40a and the third hinge pin 40b, and in such a case, predetermined sizes and shapes of end accommodation grooves 30a and 20a (see
Further, a sliding guide pad 15 (see
When a rotation direction of the rotatable lever and an installation position of the rotatable lever releasing blocking unit have been described while the embodiments of the present invention have been described above in detail, directional terms “upward” and “downward” have been used, 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.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2016-0102999 | Aug 2016 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2017/008838 | 8/14/2017 | WO | 00 |
