Push-pull door lock having Anti-panic function for fire door

Abstract

The present invention relates to a push-pull door lock having an anti-panic function for a fire door, the push-pull door lock comprising: a door; a handle part configured to move toward the door or move away from the door such that the door is locked or unlocked; a locking part installed in the handle part to lock or unlock the door; and a mortise installed inside the door to allow a part thereof to protrude outward from the door or retract into the door in response to the operation of the handle part, thereby locking or opening the door, wherein the mortise includes: a deadbolt which protrudes outward from the door when the locking part is rotated to the right and retracts into the door when the handle part is pushed, thereby locking or unlocking the door; and a latchbolt configured to move to protrude outward from the door when the handle part is left untouched while the door is open, the latchbolt being configured to retract into the door when the handle part is pushed.

Description

Push-pull door lock for fire doors with anti-panic function

[0001] The present invention relates to a push-pull door lock for a fire door, and more particularly, to a push-pull door lock for a fire door having an anti-panic function that automatically unlocks the door when the interior handle of the door lock is operated from inside the room even when the door lock device of the fire door mortise is locked.

[0002] Typically, conventional door locks for fire doors have a structure in which the door is unlocked by operating the deadbolt of the door by rotating the knob on the inner handle.

[0003] Conventional door locks with this structure have caused inconvenience to users because, in order to unlock the deadbolt, the knob on the inner handle of the door lock must be rotated to unlock the deadbolt, and then additional force must be applied in the direction in which the door opens while applying force in a direction perpendicular to the direction in which the door opens.

[0004] To solve this problem, a push-pull type door lock was developed in which the deadbolt is released when force is applied to the inner handle in the direction that the door opens.

[0005] Such conventional push-pull door locks have been proposed in Korean Patent No. 10-2141548 entitled “Push-pull door lock capable of push / pull bidirectional operation” and in Korean Patent No. 10-2356619 entitled “Push-pull door lock with anti-panic function.”

[0006] Fire doors can be equipped with fire door locks or push-pull door locks. Furthermore, in the event of a fire in a building, evacuees will either turn the handle of a fire door lock or push the handle of a push-pull door lock. Push-pull door locks are typically designed to be pushed when exiting from the interior to the exterior, and pulled when entering from the exterior.

[0007] However, when a conventional fire door lock is locked from the inside, opening the door requires unlocking it, grasping the handle, turning it, and then pushing it open. However, panicked evacuees, blinded by smoke from a fire, find it extremely difficult to unlock and open the door.

[0008] In other words, if you try to open the door from the inside while the deadbolt is locked, you have to first release the deadbolt and then turn or push the handle to open the fire door, which is a double-action, making the operation extremely cumbersome. In particular, in the event of an emergency evacuation such as a fire, there was a problem where the deadbolt could not release the locked door, causing a delay, which could lead to serious damage such as suffocation.

[0009] Accordingly, an anti-panic function was required to release the lock when the fire door is opened by pushing the handle from the inside.

[0010] This conventional push-pull door lock is a door lock that can open the door by pushing or pulling the handle body from the support part, and is provided with support parts installed on the interior and exterior sides of the door, and each support part is provided with a respective handle body installed so as to be pulled or pushed, so that the door can be opened by releasing the locked state of the door lock device.

[0011] Based on the above technical background, one embodiment of the present invention provides a push-pull door lock for a fire door that is easy to assemble and provides convenience to the user, and has an anti-panic function that allows the door to be unlocked when the handle on the inside is operated even in a locked state when the fire door is opened by turning or pushing the handle on the inside.

[0012] In order to achieve the above object, a push-pull door lock for a fire door according to one embodiment of the present invention includes a door, a handle that moves toward the door or away from the door to lock or unlock the door, a locking part installed on the handle to lock or unlock the door, and a mortise that is installed inside the door so that a portion thereof protrudes out of the door or is retracted into the door by operation of the handle part to lock or open the door, and the mortise includes a deadbolt that protrudes out of the door when the locking part is rotated to the right and is retracted into the door when the handle part is pushed to lock or unlock the door, and a latch bolt that moves to protrude out of the door when the handle part is left in a state where the door is open and is retracted into the door when the handle part is pushed.

[0013] In addition, it includes a first connecting portion connected to the deadbolt and arranged inside the door; a first driving portion that comes into contact with the first connecting portion and rotates leftward or rightward to move the first connecting portion in the leftward or rightward direction and has a first driving projection; a second connecting portion connected to the latch bolt and arranged inside the door; a rotating portion connected to the second connecting portion and rotates leftward to move the second connecting portion in the leftward direction; a descending portion connected to the rotating portion and descending to rotate the rotating portion in the leftward direction, and a second driving portion that comes into contact with the descending portion and rotates leftward or rightward to lower the descending portion and has a second driving projection, wherein when the first driving projection is rotated to the right, the second driving projection is pushed to the right, thereby allowing the deadbolt to be drawn inward.

[0014] In addition, the second connecting part may include a moving bracket installed between the latch bolt and the rotating part; a slider that allows the moving bracket and the latch bolt to separate when the moving bracket is pulled inward by rotation of the rotating part; and an elastic spring that is installed inside the moving bracket and pushes the slider.

[0015] In addition, a first hinge-joint portion installed to be spaced apart from the door may be included, and a lifting bar may be provided that is hinge-joint to the first hinge-joint portion and rotates based on the first hinge-joint portion to move toward the door or move away from the door and inserted into the interior of the body.

[0016] In addition, it may include a lifting plate connected to the lifting bar of the handle part and raised or lowered by the lifting bar; a guide bracket coupled to the door side and having a rotation guide rail formed on the inside; a rotating bracket disposed between the door and the guide bracket, connected to the guide bracket, and connected to the lifting plate through a protruding jaw to rotate along the rotation guide rail; a linking bracket having one end inserted into the rotating bracket on the door side and connected to the rotating bracket, the other end connected to a mortise, and rotating together with the rotating bracket to operate the mortise; and a restoring spring having one end fixed to the guide bracket and the other end fixed to the rotating bracket, and returning the rotating bracket to its original position through elastic force when the rotating bracket is rotated.

[0017] According to one embodiment of the present invention, a push-pull door lock for a fire door can be installed by installing a body connected to a first hinge joint, a lifting plate, a guide bracket, a rotating bracket, a linkage bracket, and a restoring spring on a door, and then attaching a handle to the body, thereby providing convenience to the user due to its good assembly efficiency.

[0018] According to one embodiment of the present invention, a push-pull door lock for a fire door can simultaneously release not only the latch bolt but also the deadbolt through an interlocking bracket when the handle is operated, so that when the fire door is opened by pushing the handle from the inside, the lock state can be released together, so that in the event of a fire, evacuees can easily release the lock state, open the fire door, and escape, thereby preventing accidents such as suffocation.

[0019] A push-pull door lock for a fire door according to one embodiment of the present invention can be unlocked by pulling the handle without having to turn the lock in case of a fire.

[0020] A push-pull door lock for a fire door according to one embodiment of the present invention has a simpler mortise configuration than conventional ones, thereby reducing manufacturing costs and maximizing the efficiency of operation.

[0021] Figure 1 illustrates a push-pull door lock for a fire door according to one embodiment of the present invention installed on a door.

[0022] Figure 2 is an exploded perspective view of a push-pull door lock for a fire door according to one embodiment of the present invention.

[0023] Figure 3 illustrates the interior configurations of a push-pull door lock for a fire door according to one embodiment of the present invention.

[0024] Fig. 4 is a cross-sectional view showing a handle portion of a push-pull door lock for a fire door according to one embodiment of the present invention.

[0025] Fig. 5 is a cross-sectional view showing a handle portion of a push-pull door lock for a fire door according to one embodiment of the present invention.

[0026] Figure 6 illustrates the interior configurations of a push-pull door lock for a fire door according to one embodiment of the present invention.

[0027] Figure 7 illustrates a push-pull door lock for a fire door according to one embodiment of the present invention installed on a door.

[0028] Figure 8 illustrates the exterior configurations of a push-pull door lock for a fire door according to one embodiment of the present invention.

[0029] Fig. 9 illustrates a door lock mortise for a fire door according to one embodiment of the present invention.

[0030] Fig. 10 illustrates a door lock mortise for a fire door according to one embodiment of the present invention.

[0031] Fig. 11 illustrates a door lock mortise for a fire door according to one embodiment of the present invention installed on a door.

[0032] Fig. 12 illustrates a door lock mortise for a fire door according to one embodiment of the present invention.

[0033] Fig. 13 illustrates a door lock mortise for a fire door according to one embodiment of the present invention installed on a door.

[0034] Fig. 14 illustrates a door lock mortise for a fire door according to one embodiment of the present invention.

[0035] Fig. 15 illustrates a door lock mortise for a fire door according to one embodiment of the present invention installed on a door.

[0036] Fig. 16 illustrates a door lock mortise for a fire door according to one embodiment of the present invention.

[0037] Fig. 17 is a cross-sectional view showing a door lock mortise for a fire door according to one embodiment of the present invention.

[0038] Fig. 18 is a perspective view showing the inside of a door lock mortise for a fire door according to one embodiment of the present invention.

[0039] Fig. 19 is a perspective view showing the inside of a door lock mortise for a fire door according to one embodiment of the present invention.

[0040] Fig. 20 is a perspective view showing the inside of a door lock mortise for a fire door according to one embodiment of the present invention.

[0041] Fig. 21 is a perspective view showing the inside of a door lock mortise for a fire door according to one embodiment of the present invention.

[0042] Fig. 22 is a perspective view showing a first driving part of a door lock mortise for a fire door according to one embodiment of the present invention.

[0043] Fig. 23 is a perspective view showing a second driving part of a door lock mortise for a fire door according to one embodiment of the present invention.

[0044] Fig. 24 is a perspective view showing a second connecting part of a door lock mortise for a fire door according to one embodiment of the present invention.

[0045] Fig. 25 is a perspective view showing a second connecting part of a door lock mortise for a fire door according to one embodiment of the present invention.

[0046] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description have been omitted for clarity of description, and the same reference numerals designate identical or similar components throughout the specification.

[0047] In this specification, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0048] Referring to FIGS. 1 to 20, a push-pull door lock (10) for a fire door according to one embodiment of the present invention may include a body (1000), a first hinge joint (2000), a reference shaft (3000), a handle (4000), a lifting plate (SP), a guide bracket (GB), a rotation bracket (HB), a linkage bracket (5000), a restoring spring (6000), and a mortise (20).

[0049] The body (1000) may be mounted on one outer surface of the door (DO). Furthermore, an installation space may be formed inside the body (1000). A body cover (1100) covering the outer surface of the body (1000) may be connected to the body (1000). Furthermore, the body cover (1100) may be formed in a shape such as a circle or a polygon. A first hinge joint (2000) may be installed on the body (1000).

[0050] That is, the first hinge joint (2000) can be installed on the body (1000) at a distance from the door (DO). A reference axis (3000) can be connected to the first hinge joint (2000). A handle (4000) can be connected to the first hinge joint (200).

[0051] The handle portion (4000) may include a lever (4100) and a second hinge-joining portion (4300). The handle portion (4000) is hinge-joined to the first hinge-joining portion (2000) via a reference axis (3000) and may be rotated about the first hinge-joining portion (2000) to be pushed toward the door (DO) or pulled away from the door (DO).

[0052] The lever (4100) may be formed to be pushed or pulled by a user. Furthermore, each side of the lever (4100) may have a side groove (4100h) formed thereon. Here, the side groove (4100h) may provide a working space to facilitate the screw-fastening of the body (1000) to the door (DO).

[0053] The second hinge joint (4300) can be connected to the lever (4100) via a screw. In addition, the second hinge joint (4300) is hinge-connected to the first hinge joint (2000) via a reference axis (3000), so that the lever (4100) can be pushed toward the door (DO) or pulled away from the door (DO).

[0054] In addition, the second hinge joint (4300) may include a clearance prevention bar (4310) and a lifting bar (4320). The clearance prevention bar (4310) may be inserted into the body (1000) and connected to the lifting plate (SP). The lifting bar (4320) may be inserted into the body (1000) and connected to the lifting plate (SP) to raise or lower the lifting plate (SP).

[0055] The elevator plate (SP) is connected to the clearance prevention bar (4310) of the handle part (4000) and can be raised or lowered by the clearance prevention bar (4310). In addition, the elevator plate (SP) can have a groove formed on the door (DO) side for connecting to the rotation bracket (HB).

[0056] Referring to Fig. 4, insertion protrusions (4311) that gently protrude on the upper and lower sides may be formed at the ends of the play prevention bar (4310). The insertion protrusions (4311) can reduce the play when the end of the play prevention bar (4310) is inserted into the lifting plate (SP), thereby preventing the lever (4100) from shaking.

[0057] Referring to FIGS. 4 and 5, when the lifting bar (4320) is rotated by the lever (4100), the play prevention bar (4310) pushes the lifting plate (SP) upward or downward with the gentle surface of the insertion jaw (4311), so that the lever (4100) can be operated smoothly.

[0058] In addition, the lifting bar (4320) is also formed with gently curved protrusions formed on the upper and lower sides of the end portion, so that when the lifting bar (4320) is rotated by the lever (4100), the lifting bar (4320) pushes the lifting plate (SP) upward or downward with the gentle surface of the curved protrusion, so that the lever (4100) can be operated smoothly.

[0059] The guide bracket (GB) may be coupled to the body (1000) on the door (DO) side and a rotation guide rail (GBa) may be formed on the inner side. The rotation bracket (HB) may be arranged between the body (1000) and the guide bracket (GB) and connected to the guide bracket (GB).

[0060] In addition, the rotating bracket (HB) is connected to the lifting plate (SP) by forming a protrusion (HB1) on the side of the lifting plate (SP) and inserting the protrusion (HB1) into a groove of the lifting plate (SP), thereby being able to rotate along the rotating guide rail (GBa). In addition, the rotating bracket (HB) may have an insertion hole (HBa) formed in the center into which a linkage bracket (5000) is inserted.

[0061] In addition, the rotary bracket (HB) can convert the up-and-down motion of the elevator plate (SP) into a rotary motion. For example, when the lever (4100) is moved toward the user and the elevator plate (SP) is raised, the rotary bracket (HB) can be rotated to the right, and when the lever (4100) is moved toward the door (DO) and the elevator plate (SP) is lowered, the rotary bracket (HB) can be rotated to the left.

[0062] The interlocking bracket (5000) can be inserted into the body (1000) and the rotation bracket (HB) on one side of the door (DO) and connected to the rotation bracket (HB). In addition, the interlocking bracket (5000) can be connected to the mortise (20) on the other side and rotated together with the rotation bracket (HB) to operate the mortise (20).

[0063] The restoration spring (6000) may have one end fixed to the guide bracket (GB) and the other end fixed to the rotation bracket (HB). In addition, the restoration spring (6000) may return the rotation bracket (HB) to its original position through elastic force when the rotation bracket (HB) is rotated.

[0064] Referring to FIGS. 8 to 19, a mortise (20) according to one embodiment of the present invention may include a main body (100), a deadbolt (DB), a first connecting portion (200), a first driving portion (300), a first driving portion projection (300'), a second connecting portion (400), a rotating portion (500), a lowering portion (600), a second driving portion (700), a second driving portion projection (700'), a key block (KB), a return spring (RR), and a pressure spring (TR).

[0065] Referring to FIGS. 10 and 11, the main body (100) is installed on the door (DO), and an indoor handle (4000) and a locking part (JG) are installed on the indoor (IN) side, and an outdoor handle (4000') is installed on the outdoor (OUT) side, and an installation space can be formed inside. In addition, the main body (100) can be installed on the side of the door (DO).

[0066] Additionally, a release portion (KH) having a groove formed into which an auxiliary key is inserted may be provided on the handle portion (4000') on the outdoor (OUT) side. The release portion (KH) is connected to the lock key (JK) and can be rotated by the auxiliary key inserted into the groove (not shown) on the outdoor side to rotate the lock key (JK). Accordingly, the locked state of the mortise (20) can be released.

[0067] Referring to Fig. 13, the deadbolt (DB) may protrude from the inner upper side of the main body (100) toward the right side of the main body (100) or may be inserted into the interior of the main body (100). In addition, the deadbolt (DB) may be used to lock the door (DO). In addition, the deadbolt (DB) may protrude from the right side of the main body (100) or may be inserted into the interior of the main body (100) by the rotation of the key block (KB).

[0068] Referring to Fig. 13, the first connecting portion (200) may be connected to the left side of the deadbolt (DB) and may be positioned inside the main body (100). Furthermore, the first connecting portion (200) may be moved left and right. Furthermore, a groove (not shown) may be formed at the bottom of the first connecting portion (200) so that it may be pushed by the first driving portion (300).

[0069] Referring to FIG. 13, FIG. 21, FIG. 22, and FIG. 23, the first driving unit (300) can be brought into contact with the first connecting unit (200) and rotated leftward or rightward to move the first connecting unit (200) leftward or rightward. In addition, the first driving unit (300) can be rotated leftward or rightward by the locking unit (JG).

[0070] When the handle (4000) is pushed, the elevator plate (SP) moves upward, thereby operating the rotary bracket (HB) connected to the elevator plate (SP). The rotary bracket (HB) can change the up-and-down movement into a rotary movement, and the linkage bracket (5000) can operate by rotating to the right.

[0071] The linkage bracket (5000) can be connected to the second driving unit (700), and when the linkage bracket (5000) rotates to the right, the second driving unit (700) can operate by rotating to the right.

[0072] When the second driving unit (700) rotates to the right, the lowering unit (600) in contact with the second driving unit (700) can press the rotating unit (500) while moving downward.

[0073] The rotating part (500) can be connected to the second connecting part (400), and when the rotating part (500) moves to the left, the second connecting part (400) can also move to the left.

[0074] The second connecting portion (400) can be fastened to a latch bolt (RB), and the latch bolt (RB) is connected to a slider (450) via a rotation shaft (440), so that it can move in the left direction together with the second connecting portion (400).

[0075] The latch bolt (RB) can be rotated around the rotation axis (440). Accordingly, the door (DO) can be opened before the latch bolt (RB) is fully inserted into the interior of the main body (100), so that the door (DO) can be opened.

[0076] The first driving unit protrusion (310) of the first driving unit (300) can contact the second driving unit protrusion (710), and when the first driving unit protrusion (310) rotates in the right direction, the second driving unit protrusion (710) can also rotate in the right direction.

[0077] As the first driving unit protrusion (310) and the second driving unit protrusion (710) rotate to the right, the first driving unit (300) of the key block (KB) can be engaged in the groove of the first connecting unit (200). As the first connecting unit (200) engaged in the groove moves to the right, the deadbolt (DB) can be drawn inward. That is, as the second driving unit protrusion (710) rotates to the right, it pushes the first driving unit protrusion (310) to the right, thereby rotating the key block (KB) to the right.

[0078] Referring to Fig. 16, the locking unit (JG) is linked to the locking key (JK), and the locking key (JK) can be inserted into the key block (KB). In addition, since the key block (KB) is connected to the first driving unit (300), the first driving unit (300) can be rotated leftward or rightward by the locking unit (JG).

[0079] The latch bolt (RB) may protrude from the inner lower side of the main body (100) toward the right side of the main body (100) or may be inserted into the interior of the main body (100). In addition, the latch bolt (RB) may have a hole formed in the left side that penetrates upward and downward and a fixing groove (RBp) formed at the left end. In addition, the latch bolt (RB) may have a rotation prevention protrusion (RBq) formed on the interior (IN) side.

[0080] The second connecting portion (400) is connected to the left side of the latch bolt (RB) and can be placed inside the main body (100). In addition, the second connecting portion (400) can be moved left and right.

[0081] When the locking part (JG) is rotated to the right, the key block (KB) is rotated to the left, and the deadbolt (DB) protrudes outward and can be locked. When the locking part (JG) is rotated to the left, the key block (KB) is rotated to the right, and the deadbolt (DB) is retracted inward, allowing the locked state to be released (released).

[0082] Referring to FIG. 17, the second connecting part (400) may include a moving bracket (410), a catch plate (420), a fixed plate (430), a rotation shaft (440), a slider (450), and an elastic spring (460).

[0083] The movable bracket (410) is formed with a fixed jaw (411) that is inserted into the fixed groove (RBp) and is connected to the rotating part (500) so that it can move in the left direction. In addition, a connecting hole can be formed in the movable bracket (410) so as to be connected to the rotating part (500).

[0084] A catch plate (420) is installed inside the moving bracket (410) and is positioned to the left of the latch bolt (RB), and a hole may be formed in the center. In addition, a slider (450) may be inserted into the hole formed in the catch plate (420), and a catch protrusion (451) provided in the slider (450) may be caught on the catch plate (420).

[0085] The fixed plate (430) can be placed inside the movable bracket (410) and fixed to the main body (100). In addition, an elastic spring (460) can be fixed to the fixed plate (430), and the fixed plate (430) can support the elastic spring (460). In addition, the fixed plate (430) can be placed so as not to impede the left-right movement of the movable bracket (410).

[0086] The rotation axis (440) can be inserted into a hole formed in the latch bolt (RB). In addition, the latch bolt (RB) can be rotated around the rotation axis (440) when the fixing jaw (411) is removed from the fixing groove (RBp).

[0087] The slider (450) can be connected to the rotation shaft (440) by having its right side inserted into a hole formed in the catch plate (420) from the left side of the catch plate (420). In addition, the slider (450) can have a catch step (451) formed on the left side to catch the catch plate (420).

[0088] The elastic spring (460) has one end fixed to the fixed plate (430) and the other end fixed to the left side of the slider (450), and can push the slider (450) to the right through elastic force.

[0089] Fig. 18 shows that when the rotating part (500) is rotated to the left by the lowering part (600), the moving bracket (410) moves to the left, and thus the fixed jaw (411) is detached from the fixed groove (RBp).

[0090] Fig. 19 shows that when the rotating part (500) is rotated to the left by the lowering part (600), the moving bracket (410) is moved to the left, and the fixed jaw (411) is separated from the fixed groove (RBp), and the latch bolt (RB) is rotated around the rotation axis (440).

[0091] When the handle part (4000) is pushed, the second driving part (700) rotates to the right, and while lowering the lowering part (600), the key block (KB) is turned to the right, allowing the deadbolt (DB) to be pulled inside.

[0092] Referring to FIGS. 18, 19, 23 and 24, with respect to the latch bolt (RB) and the second connecting portion (400) in more detail, when the fixing jaw (411) is inserted into the fixing groove (RBp), the engaging jaw (451) of the slider (450) can be separated from the engaging plate (420).

[0093] Referring to Fig. 18, when the moving bracket (410) is moved to the left by the rotating part (500), the fixed jaw (411) formed on the moving bracket (410) is detached from the fixed groove (RBp). At this time, the catch jaw (451) of the slider (450) is caught on the catch plate (420).

[0094] Referring to Fig. 19, the latch bolt (RB) can be rotated around the rotation axis (500) and can be stopped by the rotation prevention bump (RBq) coming into contact with the moving bracket (410). In other words, the rotation prevention bump (RBq) can limit the rotation angle of the latch bolt (RB). In addition, since the latch bolt (RB) is connected to the slider (450) through the rotation axis (440), it can be moved in the left direction together with the second connecting portion (400).

[0095] In summary, when the handle part (4000) or the handle part (4000') is not in operation, it may be fixed to the second connecting part (400) and protrude toward the right side of the main body (100). In addition, when the handle part (4000) or the handle part (4000') is in operation, the fixing jaw (411) formed on the moving bracket (410) is detached from the fixing groove (RBp), so that the latch bolt (RB) can be rotated around the rotation axis (440). Accordingly, the door (DO) can be opened before the latch bolt (RB) is completely inserted into the main body (100), so that the door (DO) can be opened smoothly.

[0096] The rotating part (500) is connected to the second connecting part (400) and can be rotated in the left direction to move the second connecting part (400) toward the other side of the main body (100).

[0097] The lowering member (600) is connected to the rotating member (500) and can be lowered to rotate the rotating member (500) in the left direction. In other words, the rotating member (500) can have its left end rotated downward by the lowering member (600) and its right end rotated to the left. Accordingly, the second connecting member (400) can be moved in the left direction.

[0098] The second driving unit (700) can be brought into contact with the lowering unit (600) and rotated leftward or rightward to lower the lowering unit (600). In addition, the second driving unit (700) can be rotated leftward by the handle unit (4000), and the second driving unit (700) can be rotated rightward by the handle unit (4000').

[0099] In the basic state, the upper ends of the lowering unit (600) can be in contact with the upper ends of the second driving unit (700). Then, when the second driving unit (700) is rotated to the left or right, the lowering unit (600) can be lowered by the second driving unit (700).

[0100] The key block (KB) can be positioned at an axis position of the first driving unit (300) and the second driving unit (700). In addition, the key block (KB) can be connected to the first driving unit (300) and a lock key (JK) can be inserted. In addition, the key block (KB) can be connected to a linking bracket (5000). Additionally, the linking bracket (5000) can link the handle unit (4000) and the lock unit (JG). Accordingly, the first driving unit (300) can be rotated to the left by the linking bracket (5000) when the handle unit (4000) is operated.

[0101] The return spring (RR) may be arranged inside the main body (100) and connected to the second connecting portion (400). In addition, when the second connecting portion (400) is moved to the left, the return spring (RR) may move the second connecting portion (400) to the right through elastic force, thereby causing the latch bolt (RB) to protrude to the right of the main body (100). In addition, the lowering portion (600) may be raised by the return spring (RR). In other words, when the second connecting portion (400) is moved to the left, the return spring (RR) may be compressed.

[0102] The pressure spring (TR) is arranged on the upper side of the first driving unit (300) and can press the first driving unit (300) downward through elastic force. Accordingly, the first driving unit (300) can be maintained in a state of moving to the left or right direction. More specifically, since the first driving unit (300) is maintained in a state of moving to the left or right direction by the pressure spring (TR), the deadbolt (DB) can be prevented from moving to the left or right direction. In addition, the pressure spring (TR) can assist the first driving unit (300) to operate quickly through elastic force.

[0103] As a result, the push-pull door lock (10) for a fire door according to one embodiment of the present invention can be installed by installing the body (1000) to which the first hinge joint (2000), the lifting plate (SP), the guide bracket (GB), the rotating bracket (HB), the interlocking bracket (5000), and the restoring spring (6000) are connected to the door (DO) and then connecting the handle part (4000) to the body (1000), so that the installation work can be completed and the user can be provided with convenience due to good assembly.

[0104] According to one embodiment of the present invention, the mortise (20) can simultaneously release not only the latch bolt (RB) but also the deadbolt (DB) through the interlocking bracket (5000) when the handle (4000) is operated, so that when the fire door is opened by pushing the handle (4000) from the inside, the lock state can be released together, so that in the event of a fire, evacuees can easily release the lock state, open the fire door, and evacuate, thereby preventing accidents such as suffocation.

[0105] A push-pull door lock (10) for a fire door according to one embodiment of the present invention has a simpler configuration of a mortise (20) than in the past, so that the manufacturing cost can be reduced and the efficiency of the operation process can be maximized.

[0106] Referring to FIGS. 20, 24, and 25, the elastic spring (460) is in a state of pushing the slider (450), so that the latch bolt (RB) and the movable bracket (410) can be in contact. At this time, when the movable bracket (410) is pulled, a gap is created between the latch bolt (RB) and the movable bracket (410) through the slider (450), and the latch bolt (RB) is detached from the movable bracket (410) and moves downward (sideways), thereby opening the door (DO). That is, as the distance between the movable bracket (410) and the latch bolt (RB) increases through the slider (450), the coupling force is lost, so that when the latch bolt (RB) hits the door (DO), it rotates and opens the door (DO). At this time, after the door (DO) has passed, that is, after the door has opened, the elastic spring (460) is again in a state of pushing the slider (450), so that the latch bolt (RB) and the moving bracket (410) can be in contact and connected.

[0107] The deadbolt (DB) may protrude from the upper side of the body (100) toward the right side of the body or may be inserted into the body. In addition, the deadbolt (DB) may be used to lock the door (DO). The deadbolt (DB) may protrude toward the right side of the body or be inserted into the body by the rotation of the key block (KB). The first connecting portion (200) may be connected to the deadbolt (DB) and may be positioned inside the body, and may be moved left and right.

[0108] The letch bolt (RB) is normally protruded outward by an elastic spring (460), and when the letch bolt (RB) and the moving bracket (410) are separated, the letch bolt (RB) rotates.

[0109] The locking part () is connected only to the deadbolt (DB), and is operated only when the handle part (4000) is pushed, and is not operated when the handle part (4000) is pulled. In other words, the deadbolt (DB) is operated separately from the locking part (JG) and the handle part (4000). When the locking part (JG) is rotated to the right, the deadbolt (DB) protrudes, locking the door (DO). When the handle part (4000) is pushed, the deadbolt (DB) is pulled inward, and the latch bolt (RB) is rotated and pulled inward.

[0110] When the handle (4000) is released while the door (DO) is open, only the latch bolt (RB) returns to its original state. That is, the latch bolt (RB) returns to its protruding state. At this time, the deadbolt (DB) remains retracted. At this time, when the door (DO) is closed, the deadbolt (DB) remains in its retracted state, and as the door (DO) closes, it strikes and rotates the latch bolt (RB), causing the latch bolt (RB) to protrude and close the door (DO).

[0111] Although the present invention has been described through preferred embodiments as described above, it will be readily understood by those skilled in the art that the present invention is not limited thereto and that various modifications and variations are possible without departing from the concept and scope of the patent claims set forth below.

Claims

1. Door; A handle portion that moves toward or away from the door to lock or unlock the door; A locking part installed on the above handle to lock or unlock the door; and It includes a mortise installed inside the door so that a part of it protrudes outside the door or is drawn into the inside of the door by the operation of the handle part, thereby locking or opening the door. The above motives are, When the locking part is rotated to the right, it protrudes outward from the door, and when the handle part is pushed, it is retracted into the door to lock or unlock the door, and a deadbolt and A push-pull door lock for a fire door including a latch bolt that moves to protrude outward from the door when the handle is left in the open state of the door and is drawn into the interior of the door when the handle is pushed.

2. In paragraph 1, A first connecting member connected to the deadbolt and positioned inside the door; A first driving unit having a first driving projection that comes into contact with the first connecting unit and rotates leftward or rightward to move the first connecting unit in the leftward or rightward direction; A second connecting member connected to the above-mentioned latch bolt and positioned inside the door; A rotating part connected to the second connecting part and rotating in a left direction to move the second connecting part in the left direction; A lowering part connected to the above rotating part and lowered to rotate the above rotating part in the left direction, and A second driving unit is provided that comes into contact with the lowering unit and rotates to the left or right to lower the lowering unit, and has a second driving projection. A push-pull door lock for a fire door, wherein when the first driving projection is rotated to the right, the second driving projection is pushed to the right, thereby causing the deadbolt to be drawn inward.

3. In paragraph 2, The above second connecting part A moving bracket installed between the above latch bolt and the above rotating part; A slider that causes the moving bracket and the latch bolt to separate when the moving bracket is pulled inward by the rotation of the rotating part; and A push-pull door lock for a fire door, comprising an elastic spring installed inside the above-mentioned moving bracket to push the above-mentioned slider.

4. In paragraph 1, Including a first hinge joint installed to be spaced apart from the above door, A push-pull door lock for a fire door, wherein the handle portion is hinge-joined to the first hinge-joining portion and a lifting bar is provided that rotates relative to the first hinge-joining portion to move toward the door or away from the door and is inserted into the interior of the body.

5. In paragraph 3, A lifting plate connected to the lifting bar of the handle part and raised or lowered by the lifting bar; a guide bracket connected to the door side and having a rotation guide rail formed on the inside; A rotating bracket positioned between the door and the guide bracket, connected to the guide bracket, and connected to the elevator plate through a protruding projection to rotate along the rotating guide rail; A linkage bracket having one side inserted into and connected to the rotation bracket on the door side and the other side connected to a mortise and rotating together with the rotation bracket to operate the mortise; and A push-pull door lock for a fire door, wherein one end is fixed to the guide bracket, the other end is fixed to the rotation bracket, and a restoring spring is included that returns the rotation bracket to its original position through elastic force when the rotation bracket is rotated.

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