Emergency release locking device

Abstract

To provide a locking device for emergency opening that allows a door to be opened outward in an emergency without the need of a door unlocking operation from the outside of a room and a patient to be safely carried out of the room.SOLUTION: In a locking device including a slide latch 1 mounted on the indoor side of an inward opening door D and a receiver 2 mounted on the indoor side of a door frame F, the slide latch 1 is provided with a latch member 7 sliding along a pedestal 6, and the receiver 2 is provided with a sliding guide surface 13 inclined in a direction approaching the end edge part of the door frame F from a position reached by the tip part of the latch member 7 in a locked state. When the regulation of the outward opening of the door D by the door stop is released which involves the pulling of the door D outward in an emergency in the locked state, the tip part of the latch member 7 is guided by the sliding guide surface 13, the latch member 7 slides in the retreating direction, the interference between the latch member 7 and the door D is avoided, and the door D can be opened outward.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a locking device for unlocking and locking an inward-opening door such as a toilet door, and having an emergency opening function.

Background Art

[0002] Generally, in a shared toilet of a commercial facility, public facility, medical facility, etc., a locking device provided on an inward-opening door of a private room is composed of a slide latch attached to the indoor side of the door and a receiver attached to the indoor side of the door frame. The latch member of the slide latch slides with respect to a pedestal fixed to the door and is engaged with and disengaged from the receiver to be locked and unlocked.

[0003] Further, on the outdoor surface of the door, a display for indicating the usage status of each private room based on the locked and unlocked state is attached, and this display has a keyhole for unlocking from the outdoor side in case of an emergency such as when a user falls inside the private room.

[0004] By the way, in a toilet having a plurality of private rooms provided in a shared space such as a hotel, due to aesthetic requirements, instead of attaching a display indicating the usage status to the outdoor surface of each private room door, an inward-opening door is suspended by a gravity hinge so as to be in an open state when not in use, and a specification that allows the usage status to be determined without a display may be adopted.

[0005] In such a specification, since a keyhole for unlocking in an emergency cannot be provided on the display, it is necessary to separately consider a configuration for emergency opening of the door. In Patent Document 1 below, a configuration for emergency opening of an inward-opening door without a display is proposed.

[0006] The emergency opening mechanism described in Patent Document 1 does not have a slide latch on the door D, which normally opens inward, but rather, as shown in Figure 16, a slide latch 51 is provided on the interior side of the door frame F. The slide latch 51 is such that a latch member 52 slides between a position where it protrudes from the edge of the door frame F and a position where it is retracted relative to a base fixed to the door frame F.

[0007] Furthermore, a door stopper 53 is provided at the lower part of the door near the leading edge on the interior side of door D. This door stopper 53 normally prevents door D from opening outwards, but in an emergency, it can be operated from the outside using the gap between the bottom edge of door D and the floor surface to swing inwards, allowing door D to open outwards. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2013-87451 [Overview of the project] [Problems that the invention aims to solve]

[0009] However, in the emergency opening mechanism described in Patent Document 1, when the door D is opened outwards, the latch member 52 remains protruding from the edge of the door frame F towards the entrance to the private room. Therefore, when rescuing a patient who has collapsed inside the room, there is a risk that the patient or rescuer may get caught on the latch member 52 and be injured.

[0010] Furthermore, when closing door D under normal circumstances, the latch member 52 must be slid with the hand opposite to the one closing door D, resulting in poor operability when locking. In addition, if the width of the door frame F is narrow, the latch member 52 must be shortened, making it incompatible with existing products.

[0011] Therefore, the objective of this invention is to provide an emergency-opening locking device that allows a door to be opened outward in an emergency without requiring an unlocking operation from the outside of the door, enabling the patient to be safely transported outside, without causing a decrease in operability when locking or an increase in costs. [Means for solving the problem]

[0012] To solve the above problems, this invention is used in a door in which outward opening is restricted under normal circumstances, and the restriction on outward opening is released in an emergency. A mounting bracket attached to the interior side of either the door or the door frame, The door and the door frame are attached to the other interior side via a base, and the locking / disengaging member slides or swings relative to the base and engages with and disengages from the receiving device, In an emergency opening locking device provided with a locking portion that restricts the door from being pulled inward while the engagement / disengagement member is engaged with the receiving device, In an emergency, when the door is pulled outward while the engagement / disengagement member is engaged with the receiver, the interaction between the contact points of the engagement / disengagement member and the receiver causes the engagement / disengagement member to slide or swing relative to the base in a direction that detaches it from the receiver.

[0013] Specifically, a sliding guide surface is formed on at least one of the parts where the engaging / disengaging member and the receiving member come into contact with each other. The sliding contact guide surface and the mating surface it contacts allow the door to be opened outward.

[0014] Alternatively, a rotatable roller is provided on at least one of the parts where the engaging / disengaging member and the receiving device come into contact with each other. The aforementioned roller rotates in contact with the opposing side, thereby enabling the door to be opened outward. [Effects of the Invention]

[0015] In the emergency opening corresponding lock device according to the present invention, in an emergency such as when a user falls in a compartment, when the door is pulled outward with the engaging and disengaging member engaged with the receiver, due to the interaction between the portions of the engaging and disengaging member and the receiver that abut against each other, the engaging and disengaging member is configured to slide or swing with respect to the pedestal in a direction away from the receiver.

[0016] Therefore, in an emergency, the regulation of outward opening by a door stop or the like is released, and by simply pulling the door outward, the engaging and disengaging member is guided by the contact surface with respect to the receiver and slides or swings in a direction away from the receiver, and the door can be opened outward without performing a unlocking operation using a key or the like from the outdoor side of the door.

[0017] Also, in a state where the door is opened outward, the engaging and disengaging member or the like does not protrude from the end of the door tip or the door frame of the door, so that a patient or a rescuer is not caught by the engaging and disengaging member or the like, and the patient can be safely carried out of the room, and the rescuer is not injured.

[0018] Also, the engaging and disengaging member can be attached to the door side, and when closing the door normally, the engaging and disengaging member can be slid or swung with the hand closing the door, so that the operability during locking is not reduced and there is no sense of discomfort.

Brief Description of the Drawings

[0019] [Figure 1] Plan view showing the mounting state of the first embodiment of the emergency opening corresponding lock device according to the present invention [Figure 2] View showing the same locked state (a) from the indoor side and (b) from the outdoor side [[ID=二十四]] [Figure 3] Perspective view showing the same receiver [Figure 4] Perspective view showing the tip of the same latch member [Figure 5] Plan view showing the state where the regulation of the door stop in the same emergency opening process is released [Figure 6] Perspective view showing the process in which the same (a) latch member retreats and (b) perspective view showing the state of the door opened outward from the indoor side [Figure 7] (a) Plan view showing the mounting state of the second embodiment as above, (b) Perspective view showing the tip of the latch member, (c) Perspective view showing the receiver [Figure 8] Plan view showing the mounting state of the third embodiment as above [Figure 9] (a) Plan view showing the mounting state of the fourth embodiment as above, (b) Plan view showing the mounting state of the fifth embodiment as above [Figure 10] (a) Plan view showing the mounting state of the sixth embodiment as above, (b) Plan view showing the mounting state of the seventh embodiment as above [Figure 11] (a) Plan view showing the mounting state of the eighth embodiment as above, (b) Plan view showing the mounting state of the ninth embodiment as above [Figure 12] (a) Plan view showing the mounting state of the tenth embodiment as above, (b) Plan view showing the mounting state of the eleventh embodiment as above [Figure 13] (a) Perspective view showing the locked state with the twelfth embodiment as above attached, as seen from the indoor side, (b) Left side view [Figure 14] (a) Perspective view showing the process of opening the door as above outward, as seen from the indoor side, (b) Front view [Figure 15] (a) Perspective view showing the open state of the door as above outward, as seen from the indoor side, (b) Front view [Figure 16] View showing the emergency opening means of the inward-opening door described in Patent Document 1, as seen from the indoor side

Embodiments for Carrying out the Invention

[0020] Hereinafter, embodiments of the emergency opening response lock device according to this invention will be described based on the accompanying drawings respectively.

[0021] <First Embodiment> As shown in FIGS. 1 to 6, the first embodiment of this invention includes a slide latch 1 attached to the indoor side near the door tip of a door D provided in a private room such as a shared toilet, and a receiver 2 attached to the indoor side of a door frame F facing the door tip side of the door D.

[0022] Edge members 15 and 16 are attached to the leading edge of door D and the edge of door frame F facing it, respectively. The edge member 15 of door D is curved in a convex shape so that the center of the door D in the thickness direction protrudes, and the edge member 16 of door frame F is curved in a concave shape so that the part closer to the outside protrudes. This prevents interference between the leading edge of door D and door frame F when opening and closing door D, and also blocks the view from the outside.

[0023] As shown in Figure 2, door D is suspended by a gravity hinge h and is an inward-opening door that remains open when not in use. A door stopper 3 is installed on the upper interior side of door D, and under normal circumstances, the door stopper 3 restricts door D from opening outward.

[0024] The door stopper 3 protrudes between the top edge of door D and the cap 4, and by inserting a hand between the top edge of door D and the cap 4 from the outside and pushing it down, the lock is released and the restriction on opening door D outwards is removed.

[0025] An indicator 5 is mounted on the exterior side of door D, which shows the usage status of each individual room based on the locked / unlocked state of the locking device. The indicator 5 is equipped with a handle 5a for opening door D outwards from the outside in case of emergency.

[0026] Here, as shown in Figure 1, the slide latch 1 consists of a base 6 fixed to the door D and a rectangular rod-shaped latch member 7 that slides relative to the base 6. The latch member 7 is an engagement / disengagement member that engages with or disengages from the receiving member 2, and has an end cap 9 fitted to the tip of a rod body 8 equipped with a rack that meshes with a pinion (not shown) of the base 6. A spacer 10 is interposed between the base 6 and the door D. The spacer 10 may be omitted.

[0027] When the tip of the rod 8 of the latch member 7 is engaged with the receiver 2, the tip of the rod 8 is locked by the wall surface of the insertion member 12, locking the door D so that it does not rotate inward. In other words, the wall surface of the insertion member 12 acts as a locking part S that restricts the door D from being pulled inward.

[0028] As shown in Figure 3, the receiver 2 is configured such that an internal insertion member 12 is fitted into the main body 11. A sliding contact guide surface 13 is formed on the rib in the height direction center of the internal insertion member 12, which is inclined in a direction approaching the edge of the door frame F from the position where the tip of the latch member 7 reaches when locked.

[0029] As shown in Figure 4, the end cap 9 of the latch member 7 has a sliding guide surface 14 that is inclined to correspond to the sliding guide surface 13 of the receiving device 2. Existing latch members can also be used as components of this emergency release locking device simply by replacing a part of the tip with an end cap 9 having the sliding guide surface 14.

[0030] In the locking device described above, as shown in Figure 2, when the door D is closed and the latch member 7 is advanced to the position where it engages with the receiver 2, the door D is locked and cannot be opened or closed. Under normal circumstances, when the latch member 7 is retracted to the position where it disengages from the receiver 2, the door D is unlocked and can be opened inward.

[0031] Furthermore, in the event of an emergency, such as when a user collapses inside the locked room, as shown in Figure 5, the door stopper 3 is swung inward to release the restriction on the door D from opening outward, and the user places their hand on the handle 5a of the indicator 5 and pulls the door D outward.

[0032] As a result, as shown in Figures 1 and 6(a), the sliding guide surface 13 of the receiver 2 and the sliding guide surface 14 of the latch member 7 slide against each other, and the tip of the latch member 7 is guided by the sliding guide surface 13 of the receiver 2, causing the latch member 7 to slide in the direction away from the receiver 2 (direction B shown in the figure), and as shown in Figure 6(b), interference between the latch member 7 and the door D is avoided, allowing the door D to be opened outward.

[0033] In other words, when the door D is pulled outward while the latch member 7 is engaged with the receiver 2, the sliding contact guide surfaces 13 and 14 interact with each other, causing the latch member 7 to slide relative to the base 6 in a direction that disengages it from the receiver 2 as the door D is opened outward.

[0034] Thus, with the slide latch lock described above, in an emergency, simply releasing the restriction by the door stopper 3 and pulling the door D outward will cause the latch member 7 to retract in a direction that detaches it from the receiver 2, thus unlocking the door. Therefore, the door D can be opened outward without having to perform an unlocking operation from the outside of the door D using a key or the like.

[0035] Furthermore, in this state, the latch member 7 and other components do not protrude from the edge of door D or the edge of door frame F, so the patient and rescuer will not get caught on the latch member 7, the patient can be safely carried out of the room, and the rescuer will not be injured.

[0036] Furthermore, when closing door D under normal circumstances, the latch member 7 can be slid with the hand that closes door D, so there is no decrease in operability when locking, and no sense of discomfort is felt.

[0037] <Second Embodiment> In the first embodiment shown in Figures 1 to 6, a rectangular latch member 7 is shown to enter the inside of the receiver 2 to lock it. However, in the second embodiment, as shown in Figures 7(a), (b), and (c), a similar emergency release structure can be used in a case where the latch member 7 covers the receiver 2 in a way that embraces it to lock it.

[0038] In this second embodiment, as shown in Figure 7(b), the latch member 7 has a shape in which a U-shaped latch cover 7b is attached to opposing interlocking walls 7a, and as shown in Figure 7(c), the receiver 2 has a pair of insertion grooves 2a into which the locking portion S, the sliding contact guide surface 13, and the interlocking walls 7a are inserted, and the receiver 2 is locked by being held by the latch member 7 as shown in Figure 7(a).

[0039] Furthermore, a substantially arc-shaped sliding guide surface 14 is formed on the edge of the latch cover 7b, which is the tip of the latch member 7. When the door D is opened outward with the latch member 7 engaged with the receiver 2, the interaction between the contact points of the sliding guide surfaces 13 and 14 causes the latch member 7 to slide relative to the base 6 in a direction that separates it from the receiver 2 (direction B in the figure) as the door D is opened outward.

[0040] <Third Embodiment> In the first embodiment shown in Figures 1 to 6, a sliding guide surface 14 is formed on the end cap 9 of the latch member 7. However, as shown in Figure 8, in the third embodiment, a rotatable roller 17 corresponding to the sliding guide surface 13 of the receiving device 2 may be provided on the end cap 9 of the latch member 7, so that the roller 17 rotates along the sliding guide surface 13 of the receiving device 2, allowing the door D to be opened outward.

[0041] <Fourth and fifth embodiments> In the first embodiment shown in Figures 1 to 6, the receiving device 2 and the latch member 7 each have sliding guide surfaces 13 and 14 that are inclined in substantially the same direction. However, as shown in Figure 9(a) as the fourth embodiment, the receiving device 2 may be provided with a sliding guide surface 13 that forms a substantially constant angle, and the sliding guide surface 14 on the latch member 7 side may be a small curved surface with a small contact radius. Furthermore, as shown in Figure 9(b) as the fifth embodiment, the latch member 7 may be provided with a sliding guide surface 14 that is inclined to form a substantially constant angle, and the sliding guide surface 13 on the receiving device 2 side may be a small curved surface with a small contact radius. In this case, when the door D is pulled outward, the latch member 7 moves to slide relative to the base 6 in the direction away from the receiving device 2 (direction B shown in the figure), as indicated by the dashed line in the figure.

[0042] <Sixth and seventh embodiments> Furthermore, in the second embodiment shown in Figure 7, the receiver 2 is provided with a sliding guide surface 13 at a substantially constant angle, and the sliding guide surface 14 on the latch cover 7b side is a curved surface with a large contact radius. However, as shown in Figure 10(a) as the sixth embodiment, the receiver 2 may be provided with a sliding guide surface 13 at a substantially constant angle, and the sliding guide surface 14 on the latch cover 7b side may be a small curved surface with a small contact radius. Also, as shown in Figure 10(b) as the seventh embodiment, the latch cover 7b may be provided with a sliding guide surface 14 at a substantially constant angle, and the sliding guide surface 13 on the receiver 2 side may be a small curved surface with a small contact radius. In this case as well, when the door D is pulled outward, the latch member 7 moves to slide relative to the base 6 in the direction away from the receiver 2 (direction B shown in the figure), as indicated by the dashed line in the figure.

[0043] <Eighth and ninth embodiments> Furthermore, in the first to seventh embodiments shown in Figures 1 to 10, the latch member 7 is attached to the door D side and the receiver 2 is attached to the door frame F side. However, in the eighth and ninth embodiments, as shown in Figures 11(a) and (b), the latch member 7 may be attached to the door frame F side and the receiver 2 may be attached to the door D side. In the eighth embodiment, as shown in Figure 11(a), the receiver 2 is provided with a sliding guide surface 13 that forms a substantially constant angle, and the sliding guide surface 14 on the latch member 7 side is a small curved surface with a small contact radius. In the ninth embodiment, as shown in Figure 11(b), the latch member 7 is provided with a sliding guide surface 14 that forms a substantially constant angle, and the sliding guide surface 13 on the receiver 2 side is a small curved surface with a small contact radius. In these cases as well, when the door D is pulled outward, the latch member 7 moves to slide relative to the base 6 in the direction away from the receiver 2 (direction B shown in the figure), as indicated by the dashed line in the figure.

[0044] <Tenth and eleventh embodiments> Furthermore, the tenth embodiment shown in Figure 12(a) is modified by replacing the sliding guide surface 13 of the receiver 2 in the fourth embodiment shown in Figure 9(a) with a roller 17. In addition, the eleventh embodiment shown in Figure 12(b) is modified by replacing the sliding guide surface 14 of the latch member 7 in the fifth embodiment shown in Figure 9(b) with a roller 17. Thus, the sliding guide surfaces 13, 14 and the roller 17 can be any combination.

[0045] <Twelfth Embodiment> Furthermore, while the first to eleventh embodiments shown in Figures 1 to 12 illustrate a slide latch lock in which the latch member 7 has a linearly sliding engagement / disengagement member, this invention can also be applied to a latch lock in which, as shown in Figures 13 to 15 as the twelfth embodiment, a lever 20 integrally formed with a rotating base 21 swings relative to a base 6 and acts as the engagement / disengagement member for the receiving device 2.

[0046] In this embodiment, as shown in Figure 13(a), a lever 20 is pivotably supported on the interior side of the door D via a base 6. A receiving device 2 is also fixed to the interior side of the door frame F. As in the embodiments described above, the door D normally opens inward but is restricted from opening outward, and in an emergency, the restriction on opening outward is released.

[0047] Regarding the locking and unlocking operation, under normal circumstances, closing the door D and swinging the lever 20 counterclockwise, as shown in Figure 13(b), locks the door D inward by engaging the tip of the lever 20 with the locking part S of the receiver 2. This restricts the door D from being pulled inward, thus locking it. On the other hand, to unlock it, swinging the lever 20 clockwise releases the engagement between the lever 20 and the receiver 2, allowing the door D to be opened inward.

[0048] Furthermore, a sliding guide surface 13 is formed on the support 2. This sliding guide surface 13 is formed to be inclined in a direction that approaches the interior surface of the door frame F to which the support 2 is attached, as it approaches the door D side (the right side when viewing the door D from the interior front in Figures 13 to 15) and as it moves upward.

[0049] By forming the sliding guide surface 13 in this manner, in an emergency, when the door D is pulled outward with the restriction by a door stopper (not shown) released and the door D is no longer able to open outward, as shown in Figures 14(a) and (b), the sliding guide surface 14 formed on the tip of the lever 20 and the sliding guide surface 13 formed on the receiver 2 come into contact and slide against each other. The sliding guide surface 14 on the tip of the lever 20 is guided by the sliding guide surface 13 on the receiver 2, causing the lever 20 to swing in the direction away from the receiver 2 (direction C1 shown). As shown in Figure 15(a), interference between the lever 20 and the door D is avoided, and the door D can be opened outward.

[0050] In other words, when the door D is pulled outward while the lever 20 is engaged with the receiver 2, the sliding interaction between the sliding contact guide surfaces 13 and 14 causes the door D to open outward, and as a result, the lever 20 swings relative to the base 6 in a direction that disengages from the receiver 2.

[0051] Furthermore, when the lever 20 swings clockwise to a predetermined angle, it may swing further retracted by magnetic attraction, spring biasing force, etc., until its tip automatically faces upward, as shown by the dashed line in Figure 15(b).

[0052] Furthermore, when the door D is open until the lever 20 detaches from the receiver 2, the lever 20 may swing in the direction of C2 shown in Figure 15(b) so that its tip faces downward, as indicated by the dashed line.

[0053] Thus, even with the latch lock described above, in an emergency, simply releasing the restrictions imposed by the door stopper and pulling the door D outward will cause the lever 20 to swing away from the receiver 2, unlocking the door. Therefore, the door D can be opened outward without having to perform an unlocking operation from the outside of the door D using a key or the like.

[0054] Furthermore, with door D open outwards, the tip of the lever 20, which is the engagement / disengagement component, does not protrude from the edge of door D or the edge of door frame F, so the patient can be safely carried out of the room without the rescuer being injured.

[0055] Furthermore, when closing door D under normal circumstances, the lever 20 can be swung with the hand that closes door D, so the operability when locking is not reduced, and there is no feeling of discomfort.

[0056] Furthermore, the tip of the lever 20 may have a roller instead of a sliding guide surface 14, which is rotatably supported on a rotation axis oriented in the longitudinal direction of the lever 20. With this configuration, when the door D is pulled outward, the lever 20 can easily swing on the sliding guide surface 13 of the receiver 2.

[0057] Alternatively, instead of the sliding guide surface 13 of the support 2, multiple rollers may be arranged in a continuous manner on the support 2. In this case as well, the lever 20 can easily swing on the support 2 when the door D is pulled outward.

[0058] In this embodiment, the lever 20 is integrally formed with the rotating base 21 and only swings relative to the base 6, but the lever 20 is not limited to this. For example, in another modification, the lever 20 may be configured to extend and retract in its longitudinal direction relative to the rotating base 21, and the receiving device 2 may have a sliding guide surface 13 that forms a substantially constant angle in plan view with respect to the interior surface of the door frame F to which the receiving device 2 is attached.

[0059] In this configuration, when the door D is pulled outward in an emergency, the lever 20 slides linearly horizontally relative to the base 6 and detaches from the receiver 2. At this time, the rotating base 21 does not swing relative to the base 6 while the door D is opening, but the lever 20 is retracted into the rotating base 21, so it does not interfere with the door frame F and the door D can be opened outward. In this configuration, the lever 20 may also be configured to automatically swing to an upward or downward position when it detaches from the receiver 2 and the door D is opened.

[0060] <Other> Furthermore, in each of the above embodiments, for example, as shown in Figure 2(b), an indicator 5 and a handle 5a are provided on the exterior side of the door D. However, in the case of shared toilets in hotels, etc., where aesthetic considerations are important, the indicator 5 and handle 5a may be omitted, and a handle may be provided in an inconspicuous manner on the exterior surface of the door D or the door edge, so that the exterior surface of the door D and the exterior surface of the door frame F present a continuous aesthetic appearance. In this case, in an emergency, to open the door D outward, one can insert a hand into the gap between the upper end of the door D and the coping 4, or between the lower end of the door D and the floor, and pull outward.

[0061] Furthermore, in the above embodiments, examples were given in which the receiving device 2 and the latch member 7 are provided with sliding guide surfaces 13 and 14, or rollers 17, respectively. However, the means for generating an interaction between the parts of the latch member 7 and the receiving device 2 that come into contact with each other to induce the sliding of the latch member 7 only needs to be provided on at least one of the receiving device 2 and the latch member 7, and the other contacting part may be the edge of a sharp corner or the like.

[0062] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. Accordingly, the scope of the invention is indicated by the claims and all modifications within the meaning and scope equivalent to the claims are intended. [Explanation of Symbols]

[0063] 1. Slide latch 2 Receiver 2a Insertion groove Per 3 households 4 Kasagi 5 Display 5a Handle 6 bases 7. Latch member (engaging / disengaging member) 7a interlocking wall 7b Latch cover 8 rods 9 End caps 10 Spacers 11 Main unit 12 Insertion member 13,14 Sliding guide surface 15,16 Edge members 17 Rollers 20 Lever (engaging / disengaging member) 21 Rotating Base Door D F Door frame h Gravity Hinge S Locking part

Claims

1. It is used for doors that are normally restricted from opening outwards, but are released from the restriction in emergencies. A receiving device attached to the interior side of either the door or the door frame; a locking member attached to the other of the door and the door frame via a base, sliding or swinging relative to the base, and engaging and disengaging with the receiving device; In an emergency opening compatible locking device provided with a locking portion that restricts the door from being pulled inward when the locking member is engaged with the receiving device, In an emergency, when the door is pulled outward with the engaging / disengaging member engaged with the receiving device, the interaction between the abutting portions of the engaging / disengaging member and the receiving device causes the engaging / disengaging member to slide or swing relative to the base in a direction to detach from the receiving device.

2. a sliding guide surface is formed on at least one of the portions where the engaging / disengaging member and the receiving tool come into contact with each other; 2. The emergency opening lock device according to claim 1, wherein the door can be opened outward as the sliding contact guide surface slides against the mating surface that contacts it.

3. a rotatable roller is provided at least at one of the portions where the engaging / disengaging member and the receiving tool abut against each other, 2. The emergency locking device according to claim 1, wherein the door can be opened outward by the roller rotating in contact with its mating side.

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