Emergency hatch

Abstract

To provide an escape hatch capable of improving safety when a lid is opened / closed by using a lock of a simple structure.SOLUTION: An escape hatch 1 has: a frame 12 provided for a building opening 10A; and a lid 14 one part of which is supported relative to the frame 12, rotates, and opens / closes; a lock 20 which is provided for the lid 14, unlocks the frame 12 from above the lid 14, and unlocks the lid 14 from below. The lock 20 comprises: an unlocking member 20A; a locking member 20B advancing / retracting a locking hole 12C of the frame 12 as the unlocking member 20A rotates; and a locking part 20C engaging the locking hole 12C and locking on an end side of the locking member 20B. The locking member 20B is engaged with an unlocking tool 30 from above, evacuates the locking part 20C from the locking hole 12C by rotating the unlocking tool 30 to unlock and is unlocked only by manual operation from below.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an emergency exit hatch. [Background technology]

[0002] Patent Document 1 discloses a storage frame (1) that is fitted and fixed to an opening in a slab of a floor or a balcony, an upper cover (2) and a lower cover (3) that are pivotally attached to the floor and ceiling sides of the storage frame (1) so that they can swing up and down, an opening / closing interlocking mechanism (5) that links the upper cover (2) and the lower cover (3) to open and close them, a ladder that is folded and stored in the storage frame (1) and that extends to the floor below or a height close to the floor when the upper cover (2) and the lower cover (3) are opened, a locking mechanism (6) that is comprised of a locking member (7) that protrudes downward from the inner surface at the swing free end of the upper cover (2) and an engaging member (8) that can be engaged and disengaged with the locking member (7), and an opening arm (18) that protrudes below the lower cover, and the locking mechanism (6) is released by operating the opening arm (18). The document describes an escape hatch that is removable, characterized in that the locking member (7) is composed of an engaging hook member that protrudes downward from the inner surface of the swing free end side of the top cover (2), the engaging member (7) is supported so as to be movable up and down relative to the inner surface of the storage frame (1), and is composed of an engaging piece (8) that has a vertically long groove (10) formed in its side portion that can be engaged with and disengaged from the engaging hook member (7), the upper part of this engaging piece (8) is connected to a rotary lock release device (14) supported on the inner surface of the side wall of the storage frame (1) by a connecting cord (16), the rotary lock release device (14) is elastically biased toward the unlocking side of the engaging piece, and the tip of the opening arm (18) is abutted against this rotary lock release device (14) to hold the rotary lock release device (14) in a position that resists the elastic biasing force.

[0003] Patent Document 2 describes an evacuation device comprising a storage frame fixed to an opening in a slab such as a balcony, upper and lower covers pivotally attached to the storage frame so as to be able to open and close, and a ladder that is folded and stored within the storage frame and extends downward when the upper and lower covers are opened, the device comprising a locking mechanism having a locking hook hanging vertically from the open end of the upper cover, a locking protrusion protruding toward the inside of the storage frame, and a locking member formed in a plate shape with an elongated hole inside, within which the locking protrusion is non-detachable but movable along the elongated hole, the upper end of the elongated hole being able to engage with and disengage from the locking hook, and a stopper member is provided on the inner surface of the upper cover above the locking hook, which absorbs the excess stroke that occurs when the elongated hole disengages from the locking hook when the upper cover swings up and down when the locking hook and the locking member are engaged.

[0004] Patent Document 3 describes an escape hatch 1 that is arranged in a rectangular opening in a balcony or floor between the upper and lower floors of a building and has an upper cover 2 and a lower cover 3 that are connected by a link mechanism 20 and open and close in conjunction with each other, characterized in that the escape hatch is equipped with: a locking fitting 5 having a long through groove fixed to the back surface near one of the left and right side edges of the front part of the upper cover 2; a locking lever 6 that is pivotally mounted on a base 11 that is fixed to the front part of the inside surface of the hatch box 4 on the side to which the locking fitting 5 is fixed and has a locking piece 6b that is normally inserted into the long through groove of the locking fitting 5 of the upper cover 2 and that, when the upper cover 2 is pulled up to open it, locks the closed part of the long through groove of the locking fitting 5 to prevent it from opening more than a certain distance; and a lock release lever 7 that is pivotally mounted on the rear part of the inside surface of the hatch box 4 on the side to which the locking lever 6 is pivotally mounted and rotates the locking lever 6 to disengage the locking piece 6b from the groove of the locking fitting 5. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-142519 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-095354 [Patent Document 3] Japanese Patent Application Laid-Open No. 2007-050080 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the invention described in Patent Document 1 has a locking mechanism with a complex structure inside the hatch, and when unlocking the hatch from above, the lock cannot be released unless the top cover is slightly lifted and the engaging piece is manually disengaged from the engaging hook member, which poses a risk of a person's hand or fingers being pinched between the top cover and the storage frame during the unlocking operation.In addition, because the hatch can be easily opened by a third party, there is a risk that the third party may fall into the hatch.

[0007] Furthermore, the invention described in Patent Document 2 requires that the top cover be lifted from the storage frame and the locking member be manually removed from the locking hook of the locking mechanism through the gap, creating a risk of a person's hand or fingers being pinched between the top cover and the storage frame when removing the locking member from the hook. Furthermore, because the hatch can be easily opened by a third party, there is a risk that the third party may fall into the hatch.

[0008] Furthermore, the invention described in Patent Document 3 is equipped with a locking mechanism comprised of a locking metal fitting and a lock lever with a complex structure on the inside of the top cover, and when opening the top cover, the user must reach into the gap between the top cover and the hatch body by lifting the end of the top cover, and then press down the lock release protrusion on the lock lever to release the lock, which poses a risk of a person's hand or fingers getting caught between the top cover and the hatch body when releasing the lock.In addition, because the hatch can be easily opened by a third party, there is a risk that the third party may fall into the hatch.

[0009] An object of the present invention is to provide an emergency hatch that can improve safety when opening and closing the lid using a latch lock with a simple structure. [Means for solving the problem]

[0010] The emergency exit hatch of the first embodiment is an emergency exit hatch that is installed in a building opening that is opened in a building, and includes a frame that is installed in the building opening, a lid that is supported on one side relative to the frame and rotates to open and close, and a lock lock that is installed on the lid and is unlocked from the above side of the lid relative to the frame and from the below side of the lid, and the lock lock is composed of an unlocking member, a locking member that advances and retreats into a locking hole in the frame by rotating the unlocking member, and a locking section at the tip side of the locking member that engages with the locking hole and locks, and the locking member is unlocked when an unlocking tool is engaged from the above side and rotated to retract the locking section from the locking hole, and can be unlocked from the below side only by manual operation.

[0011] The second aspect of the emergency exit hatch is the emergency exit hatch of the first aspect, in which the unlocking member engages with the lid when the unlocking device is rotated while still engaged, and when pulled upward, the lid is opened with the locking member retracted from the locking hole.

[0012] The emergency exit hatch of the third aspect is the emergency exit hatch of the first or second aspect, wherein the locking member of the unlocking member has a biasing member that applies a biasing force to the locking hole when in a locked state.

[0013] The emergency exit hatch of the fourth aspect is an emergency exit hatch of the first or second aspect, which has a compression damper that applies a spring force in the direction of opening the lid when the unlocking member is rotated in the unlocking direction and the lid is pulled up.

[0014] The emergency exit hatch of the fifth aspect is the emergency exit hatch of the third aspect, which has a compression damper that applies a spring force in the direction of opening the lid when the unlocking member is rotated in the unlocking direction and the lid is pulled up.

[0015] The emergency exit hatch of the sixth aspect is an emergency exit hatch of the first or second aspect, in which the locking member has an unlocking piece that protrudes downward from the locking member, and is unlocked by manually moving the locking member in the unlocking direction.

[0016] The seventh aspect of the emergency exit hatch is the emergency exit hatch of the third aspect, in which the locking member has an unlocking piece that protrudes downward from the locking member, and is unlocked by manually moving the locking member in the unlocking direction.

[0017] An emergency exit hatch according to an eighth aspect is the emergency exit hatch according to the first or second aspect, wherein the lid has a handle provided on the underside of the lid facing downward.

[0018] An emergency exit hatch according to a ninth aspect is the emergency exit hatch according to the third aspect, wherein the lid has a handle provided on the underside of the lid facing downward.

[0019] The emergency exit hatch of the tenth aspect is an emergency exit hatch of the first or second aspect, in which the unlocking device has a handle, an operating rod extending downward from the lower center of the handle, and an engaging portion at the lower end of the operating rod that engages with the unlocking member.

[0020] The emergency exit hatch of the eleventh aspect is an emergency exit hatch of the first or second aspect, wherein the lid is provided with a pressing piece that acts on a detector installed on the frame, and is capable of detecting a closed state in which the pressing piece acts on the detector, and an open state in which the pressing piece does not act on the detector. [Effects of the Invention]

[0021] The emergency exit hatch of the first aspect allows the lid to be unlocked and opened / closed with simple operations compared to those with complex locking mechanisms, and since hands do not need to be inserted between the lid and the frame, hands or fingers are prevented from getting pinched, and third parties can be prevented from opening the lid.

[0022] According to the emergency exit hatch of the second aspect, the lid can be easily unlocked and opened from the top side of the lid, compared to an emergency exit hatch that has a locking mechanism on the underside of the lid.

[0023] The emergency exit hatch according to the third aspect can maintain the locked state more reliably than one in which the locking mechanism can be opened by a third party.

[0024] According to the emergency exit hatches of the fourth and fifth aspects, the lid can be opened with less force than if the lid were to fall freely in the closing direction under its own weight when opened, and the lid can be prevented from closing inadvertently.

[0025] According to the emergency exit hatches of the sixth and seventh aspects, the locking member can be easily unlocked with one hand from the underside of the lid, compared to those having a complex locking mechanism.

[0026] The emergency exit hatches of the eighth and ninth aspects make it easier to open the lid by grasping the handle and pushing it open, compared to hatches that require you to push the underside of the lid with your palm facing up. Furthermore, when closing the lid from inside the frame opening, the lid, which is biased in the opening direction, can be easily closed by pulling the handle from the underside, improving safety.

[0027] According to the emergency hatch of the tenth aspect, the lid can be unlocked and opened from the top side using only an easily portable tool, compared to those that require inserting a hand through the gap between the lid and the frame to unlock.

[0028] According to the emergency exit hatch of the eleventh aspect, the open / closed state of the cover can be grasped by an electrical signal, as opposed to a hatch in which the open / closed state of the cover is determined visually. [Brief explanation of the drawings]

[0029] [Figure 1] FIG. 1 is a plan view showing an emergency exit hatch according to an embodiment of the present invention. [Figure 2] FIG. 2 is a partially cross-sectional side view taken along the line AA in FIG. [Figure 3] FIG. 2 is a partially cross-sectional side view taken along the line BB in FIG. [Figure 4] 2 is a partially cross-sectional side view taken along the line CC in FIG. 1, showing the open and closed states of the opening and closing cover. [Figure 5] FIG. 2 is a partial cross-sectional side view showing the latch lock of the present invention locked to the frame. [Figure 6] 1 is a partially cross-sectional side view showing the state in which the latch lock of the present invention is unlocked by an unlocking device. [Figure 7] 1 is a partially cross-sectional side view showing the open state of the opening / closing cover of the present invention. [Figure 8] FIG. 10 is a partial cross-sectional side view showing a modified example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0030] An example of an emergency exit hatch according to the present embodiment will be described with reference to the drawings. In the plan view, the front side of the paper is referred to as the upper side, and the opposite side is referred to as the lower side.

[0031] [Embodiment] <Overall structure of the emergency exit hatch> As shown in Figure 1, the emergency exit hatch 1 has a frame 12 installed in a building opening 10A of a building 10, a lid 14 supported on one side by the frame 12 and pivoting to open and close, and a lock 20 installed on the lid 14 and unlocked from above the lid 14 relative to the frame 12, as well as from below the lid. In this embodiment, the upper surface 14A of the lid 14 is approximately at the same level as the upper surface of the frame 12. In addition, a latch lock 20 is used as the lock 20 in this embodiment as an example.

[0032] 1 to 3, frame 12 has frame opening 12A formed therein large enough for a person to pass through, and lid 14 is installed inside frame opening 12A with one end rotatably supported by support shaft 14C. A compression damper 16 is provided between frame 12 and lid 14 so that it can rotate and expand. A handle 12B is provided on the inner surface of frame 12, on the free open end side of lid 14, for a person to grasp when ascending or descending, and a lower member 14D on the underside 14B side of lid 14 is provided with a handle 14E that assists a person when unlocking lid 14 from below and that is grasped when opening lid 14.

[0033] 〔frame〕 2 and 3, the frame 12 has a frame opening 12A with a stepped cross section that is wider at the top and slightly narrower at the bottom, and the opposite side of this stepped frame opening 12A is fixed to a building opening 10A by an angle iron 10B. Between the frame 12 and the building opening 10A, the top of the angle iron 10B is sealed by a fire-resistant sealant 10C. In addition, two of the above-mentioned handles 12B are provided on the stepped lower side of the frame opening 12A.

[0034] 〔lid〕 2 and 3, the lid 14 is formed by an upper surface 14A, a lower surface 14B, and a lower member 14D, and a handle 14E is provided downward on the lower member 14D near the free open end of the lid 14. The lid 14 is closed when the edge of the lower member 14D rests in contact with the upper surface of the stepped portion of the frame opening 12A. The lid 14 also has a latch lock 20, which will be described later, near the free open end.

[0035] [Compression damper] As shown in Fig. 3, one end of the compression damper 16 is rotatably fixed to the lid 14, and the other end is rotatably fixed to the stepped lower side of the frame opening 12A. In Fig. 3, the lid 14 is in the closed state, so the compression damper 16 is in a compressed state.

[0036] 4, the compression damper 16 includes a cylindrical body 16A and a piston 16B that is slidable inside the cylindrical body 16A, and compressed gas is sealed inside the piston 16B to cause the piston 16B to be in an extended state. As a result, the compression damper 16 urges or presses the lid 14 in the opening direction, thereby reducing the force required by a person to pull up the lid 14 to open it, and also supports the weight of the lid 14 when pushing it down to close it, thereby avoiding a sudden closing operation and preventing a person's hand or fingers from getting caught between the lid 14 and the frame 12.

[0037] [Detector and pressure piece] As shown in Figures 3 and 4, a detector 32 is provided in the frame opening 12A on the lower side of the frame 12. The detector 32 has a tiltable and rotatable detection member 32A at its upper part, and is connected to a control panel (not shown) installed in the building 10 via wiring (not shown). Meanwhile, a pressing piece 14H is provided on the lower member of the lid 14, which presses and tilts the detection member 32A when the lid 14 is in the closed state. When the lid 14 is in the closed state shown in Figures 3 and 4, the pressing piece 14H rotates the detection member 32A in the tilting direction, turning the detector 32 ON and transmitting a closed signal to the control panel indicating that the lid 14 is in the closed state. In this embodiment, a limit switch is used as the detector 32.

[0038] 7, when the lid 14 is in the open state, the detection member 32A of the detector 32 is separated from the pressing piece 14H of the lid 14. In this state, the detection member 32A stands upright, the detector 32 is in the OFF state, and no close signal is sent to the control panel, thereby notifying that the lid 14 is in the open state in the direction of the arrow Y.

[0039] <Main components> Next, the main parts of the present invention will be described with reference to FIGS.

[0040] [Latch lock] 5 and 6, latch lock 20 is comprised of an unlocking member 20A, a locking member 20B that moves into and out of locking hole 12C of frame 12 as unlocking member 20A rotates, and a locking part 20C that engages with locking hole 12C at the tip of locking member 20B to lock. Locking member 20B is unlocked when unlocking tool 30 is engaged from above and rotated to retract locking part 20C from locking hole 12C, and can also be unlocked from below by manual operation only. To unlock by hand from below, unlocking piece 20D, which extends downward from the end of locking member 20B opposite locking part 20C, is moved to the opposite side of locking part 20C.

[0041] The unlocking member 20A of the latch lock 20 is circular in plan view, and has an engaged recess 20F formed on its top surface, which engages with an engaging portion 30C of the unlocking tool 30, which will be described later. The unlocking member 20A is operatively connected to the locking member 20B, and when the unlocking member 20A rotates, the locking member 20B moves forward and backward relative to the locking hole 12C opened in the frame opening 12A of the frame 12.

[0042] The latch lock 20 is covered by a cover plate 18 on the side of the underside 14B of the lid 14. The cover plate 18 has a vertical plate 18A fixed to the underside 14B of the lid 14, a horizontal plate 18B formed continuously with the vertical plate 18A, and an opening 18C through which the unlocking piece 20D of the locking member 20B protrudes downward. The end of the locking member 20B opposite the locking portion 20C is biased in a direction protruding from a locking member passage hole 14G opened in the end surface of the lid 14 by a biasing member 20E provided between the cover plate 18 and the vertical plate 18A. In this embodiment, a coil spring is used as the biasing member 20E.

[0043] [Unlocking tool] The unlocking device 30 for unlocking the latch lock 20 will be described with reference to FIGS.

[0044] The unlocking tool 30 has a handle 30A, an operating rod 30B extending downward from the lower center of the handle 30A, and an engaging portion 30C at the lower end of the operating rod 30B that engages with the unlocking member 20A. The engaging portion 30C of the unlocking tool 30 engages or fits into the engaged recess 20F of the unlocking member 20A via a lock mounting hole 14F that opens in a portion of the lid 14 that corresponds to the unlocking member 20A. The engaging portion 30C is formed slightly smaller than the engaged recess 20F, and its shape in a plan view is approximately similar to that of the engaged recess 20F.

[0045] <Function of main parts> Next, the operation of the main parts will be described with reference to FIGS.

[0046] The initial state is shown in Figure 5. As shown in Figure 5, the lid 14 is locked to the frame 12. In this state, the engaging portion 30C of the unlocking tool 30 is inserted through the lock mounting hole 14F of the lid 14 and engaged with the engaged recess 20F of the unlocking member 20A. The engaging portion 30C fits inside the engaged recess 20F.

[0047] As shown in Figure 6, when the unlocking tool 30 is rotated horizontally, the locking member 20B, which is operatively connected to the unlocking member 20A as it rotates, retreats from the locking hole 12C of the frame 12, thereby unlocking the door. That is, the locking member 20B is pulled in the direction of arrow X shown in Figure 4, thereby entering the unlocked state. At this time, the engaging portion 30C of the unlocking tool 30 also rotates, and the upper surface of the engaging portion 30C rotates horizontally and comes into contact with the engaging surface 14J formed on the lower surface 14B of the lid 14.

[0048] If a person maintains this state and pulls up the handle 30A of the unlocking tool 30, the lid 14 will rotate upward around the support shaft 14C as the rotation axis, as shown in Figure 4, and enter an open state, releasing the unlocking tool 30 used to pull up the lid 14 from the locking member 20B.

[0049] At this time, the compression damper 16 is in an extended state and continues to urge or press the lid 14 in the opening direction, but as shown in Figure 7, a stopper member 12D protruding inward from the frame opening 12A of the frame 12 and a stopped member 14K protruding from the side of the lid 12 come into contact with each other, restricting the opening of the lid 14 and thereby avoiding a collision between the upper surface 14A of the lid 14 and the upper end of the frame opening 12A.

[0050] When the lid 14 is in the open state, the detection member 30A of the detector 30 and the pressing piece 14H of the lid 14 are separated, so the detector 30 is in the OFF state and no close signal is sent to the control panel, allowing the control panel to know that the lid 14 of the emergency exit hatch 1 is in the open state. On the other hand, if the lid 14 begins to close in the direction of arrow Z against the biasing force of the compression damper 16 and enters the closed state (see Figure 4), the pressing piece 14H of the lid 14 presses the detection member 30A of the detector 30, tilting it in the direction of arrow W, causing the detector 30 to enter the ON state, and a close signal is sent to the control panel, allowing the control panel to know that the lid 14 of the emergency exit hatch 1 is in the closed state.

[0051] When closing lid 14 from inside frame opening 12A, lid 14, which is biased in the opening direction by compression damper 16, can be easily closed by a worker or other person by pulling handle 14E from the side of underside 14B of lid 14. This operation involves a person reaching out from inside frame opening 12A to close lid 14, so by providing handle 14E on the side of underside 14B of lid 14, the closing action of a person who is unsteady inside frame opening 12A can be stabilized, preventing dangerous situations such as a person falling, thereby improving safety.

[0052] <Modification> A modified example of the present invention will be described with reference to Fig. 8. Note that the same components as those in this embodiment are given the same reference numerals, and only the different components are given new reference numerals.

[0053] As shown in Figure 8, in this modified example of the present invention, decorative members are provided on the building 10 in which the emergency exit hatch 1 is installed, and on the upper surfaces of the frame 12 and lid 14 of the emergency exit hatch 1. This takes into consideration that decorative members such as tiled, stone-faced, or cushioned flooring may be applied to the floor depending on the building's design. In this case, a notch 40A is provided in the decorative member 40 where the latch lock 20 is installed, so as not to interfere with the operation of the unlocking device 30.

[0054] As described above, the present invention provides an emergency exit hatch 1 to be installed in a building opening 10A that is opened in a building 10, comprising a frame 12 provided in the building opening 10A, a lid 14 that is supported at one end relative to the frame 12 and rotates to open and close, and a latch lock 20 provided on the lid 14 and that is unlocked from the top side of the lid 14 relative to the frame 12 and from the bottom side of the lid 14, the latch lock 20 including an unlocking member 20A, a locking member 20B that moves forward and backward into a locking hole 12C in the frame 12 as the unlocking member 20A rotates, and a locking section 20C at the tip side of the locking member 20B that engages with the locking hole 12C to lock it, the locking member 20B is unlocked when an unlocking tool 30 is engaged from above and rotated to retract the locking section 20C from the locking hole 12C, and can also be unlocked from below by manual operation only.

[0055] This allows the lid 14 to be unlocked and opened / closed with a simple operation compared to those having a complicated locking mechanism, and since there is no need to insert a hand between the lid 14 and the frame 12, it is possible to prevent hands or fingers from getting caught and to prevent a third party from opening the lid 14.

[0056] Furthermore, when the unlocking member 20A is rotated while the unlocking tool 30 is engaged, it engages with the lid 14, and when it is pulled upward, the lid is opened with the locking member 20B retracted from the locking hole 12C.

[0057] This makes it easier to unlock and open the lid 14 from the side of the upper surface 14A of the lid 14 compared to a case in which a locking mechanism is provided on the underside of the lid 14.

[0058] Furthermore, the locking member 20B of the unlocking member 20A has a biasing member 20E that applies a biasing force to the locking hole 12C in the locked state.

[0059] This allows the locked state to be maintained more reliably than with a locking mechanism that can be opened by a third party.

[0060] The unlocking member 20A also has a compression damper 16 that applies a biasing force in the direction of opening the lid 14 when the unlocking member 20A is rotated in the unlocking direction to pull up the lid 14.

[0061] This allows the lid 14 to be opened with a smaller force than when the lid 14 falls freely in the closing direction due to its own weight when opened, and prevents the lid 14 from closing accidentally.

[0062] The locking member 20B also has an unlocking piece 20D that protrudes downward from the locking member 20B, and is unlocked by manually moving the locking member 20B in the unlocking direction.

[0063] This allows the locking member 20B to be unlocked easily with one hand from the side of the lower surface 14B of the lid 14, compared to a locking mechanism having a complex construction.

[0064] The lid 14 also has a handle 14E provided on the lower surface 14B of the lid 14 facing downward.

[0065] This makes it easier to open lid 14 by grasping handle 14E and pushing open lid 14, compared to pushing open underside 14B of lid 14 with your palm facing up. Also, when closing the lid from inside the frame opening, the lid, which is biased in the opening direction, can be easily closed by pulling handle 14E from the side of underside 14B, improving safety.

[0066] The unlocking tool 30 also has a handle 30A, an operating rod 30B extending downward from the lower center of the handle 30A, and an engaging portion 30C at the lower end of the operating rod 30B that engages with the unlocking member 20A.

[0067] This allows the lid 14 to be unlocked and opened from the top side using only an easily portable tool, compared to unlocking by inserting a hand through the gap between the lid 14 and the frame 12.

[0068] In addition, the lid 14 is provided with a pressing piece 14H that acts on a detector 32 installed on the frame 12, and is capable of detecting a closed state in which the pressing piece 14H acts on the detector 32, and an open state in which the pressing piece 14H does not act on the detector 32.

[0069] This allows the open / closed state of the lid 14 to be grasped by an electrical signal, as opposed to visually checking the open / closed state of the lid 14.

[0070] The above describes the embodiments of the present invention, but these embodiments are merely examples, and various modifications can be made without departing from the spirit of the present invention. It goes without saying that the scope of the present invention is not limited to these embodiments.

[0071] For example, although the detector 32 is described as using a limit switch, it is not limited to this and may also be a striker detector using a photocell, or any device that can detect the open / closed state of the lid 14 may be used.

[0072] Furthermore, although the description has been given of a coil spring as the biasing member 20E, this is not limited to this, and any other material that can bias the locking member 20B toward the locking hole 12C, such as a leaf spring, elastic resin material, or compression damper, may be used. [Explanation of symbols]

[0073] 1 Emergency hatch 10 Building 10A Building Opening 10B angle material 10C Sealing material 12 slots 12A Frame Opening 12B Handle 12C Locking hole 12D Stopper member 14 Lid 14A Top 14B Bottom 14C Support shaft 14D Lower member 14E Handle 14F Lock mounting hole 14G Locking member passage hole 14H pressing piece 14J Engagement surface 14K Stopped part 16 Compression damper 16A cylinder 16B piston 18 Cover plate 18A standing board 18B Horizontal board 18C aperture 20 Latch lock (an example of a lock) 20A Unlocking member 20B Locking member 20C Locking section 20D Unlocking piece 20E Urging member 20F Engaged recess 30 Lockpicking Tool 30A handle 30B Actuating rod 30C Engagement part 32 Detector 32A Detecting member 40 Decorative materials 40A Notch

Claims

1. An escape hatch installed in a building opening, The building opening has a frame, a lid that is supported on one side by the frame and pivots to open and close, and a lock that is attached to the lid and unlocked from above the lid and from below the lid, The lock includes an unlocking member, a locking member that moves into and out of the locking hole of the frame by rotating the unlocking member, and a locking section that engages with the locking hole at the tip side of the locking member to lock it, The locking member is unlocked by engaging an unlocking tool from the upper side and rotating the unlocking tool to retract the locking part from the locking hole, and can also be unlocked by simply operating the hand from the lower side. Emergency hatch.

2. 2. The emergency exit hatch according to claim 1, wherein the unlocking member engages with the lid when the unlocking tool is rotated while engaged, and the lid is opened with the locking member retracted from the locking hole by pulling the unlocking member upward.

3. 3. The emergency exit hatch according to claim 1, wherein the locking member of the unlocking member has a biasing member that applies a biasing force to the locking hole in a locked state.

4. 3. The emergency hatch according to claim 1, further comprising a compression damper that applies a biasing force in the direction of opening the lid when the unlocking member is rotated in the unlocking direction to lift up the lid.

5. 4. The emergency exit hatch according to claim 3, further comprising a compression damper that applies a biasing force in the direction of opening the lid when the unlocking member is rotated in the unlocking direction to lift up the lid.

6. 3. The emergency exit hatch according to claim 1, wherein the locking member has an unlocking piece that protrudes downward from the locking member, and is unlocked by manually moving the locking member in an unlocking direction.

7. 4. The emergency exit hatch according to claim 3, wherein the locking member has an unlocking piece that projects downward from the locking member, and is unlocked by manually moving the locking member in an unlocking direction.

8. 3. The emergency hatch according to claim 1, wherein the lid has a handle provided on the underside of the lid facing downward.

9. 4. The emergency hatch according to claim 3, wherein the lid has a handle provided on the underside of the lid facing downward.

10. 3. The emergency exit hatch according to claim 1, wherein the unlocking device has a handle, an operating rod extending downward from the lower center of the handle, and an engaging portion at the lower end of the operating rod that engages with the unlocking member.

11. An emergency exit hatch as described in claim 1 or 2, wherein the lid is provided with a pressing piece that acts on a detector installed on the frame, and is capable of detecting a closed state in which the pressing piece acts on the detector, and an open state in which the pressing piece does not act on the detector.

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