JPH06165834A - Upper/lower lid opening mechanism in double ceilings refuging device - Google Patents

Abstract

PURPOSE:To constitute the mechanism so that a lower lid and an upper lid can be opened from a downstair side, and refuge and a rescue operation from the downstair side to an upstair side can be executed. CONSTITUTION:An arm 21 is attached pivotally so as to be rotatable to the inside surface of the lower frame 4 attached to an opening part provided on the ceiling of the downstair side of a slab of a floor, a veranda, etc. On a free end part side of the arm 21, an engaging piece for engaging so as to be engaged/disengaged with/from a projecting pin 28 protruded to the free end part of the lower cover 6 is hung down, and in the base end part of the arm 21, and an opening operation catch 23 protruded to its lower part, when the lower cover 6 is closed is provided. An opening operation transfer member 24 attached pivotally so as be rotatable to the inside surface of the upper frame 3 is engaged so as be engageable/disengaged onto/from the detaining surface 25a of the upper cover engaged/piece hung down to the lower face of the upper cover 3. The free end part of the arm 21 and the free end part of the opening operation transfer member 24 are connected by a connecting rod 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper and lower lid opening mechanism in a double-ceiling evacuation device, and more specifically, a slab such as a floor or a veranda and an opening provided in a ceiling below the floor. The upper part of the double-ceiling evacuation device that is attached to and allows the ladder to extend and descend from above and below,
The present invention relates to a lower lid opening mechanism.

[0002]

2. Description of the Related Art Generally, as an evacuation device used for a double ceiling having a space between a slab such as a floor or a veranda and a ceiling below the floor, a slab such as a floor or a veranda and a ceiling below the floor are provided. An upper frame and a lower frame which are attached to the openings respectively provided, an upper lid and a lower lid which are pivotally attached to the upper frame and the lower frame, respectively. It is known to have, for example, a pantograph ladder that extends to or below the floor below when the lid and lower lid are opened. In order to make the double-ceiling evacuation device configured in this way smaller, it is possible to make the outer shape of the upper frame that houses the ladder smaller, but in order to make it easier for the extended ladder to climb up and down. Need to tilt the ladder. Therefore, it is necessary to make the opening of the lower frame larger than the opening of the upper frame.

By the way, in consideration of privacy, the evacuation device constructed as described above generally has an interlocking structure in which the lower lid is opened along with the opening of the upper lid. It is a structure that cannot be opened. Therefore, for example, there is a problem that evacuation from the downstairs side such as the basement to the upstairs and rescue activities from the downstairs side of the rescuer cannot be performed sufficiently.

As means for solving this problem, for example,
The pull tab for opening is attached to one end of the rotary arm pivotally attached to the inner surface of the lower frame, the other end is engaged with the upper lid, and the pull tab for opening is pulled down to open the upper lid from the downstairs side. At the same time, it is conceivable that the lower lid is opened and the ladder is lowered.

[0005]

However, in the conventional evacuation apparatus having the lower lid opening mechanism, the ladder must be lowered as the lower lid is opened.
There is a problem that the ladder is limited to one that is placed on the upper surface of the lower lid and descends by its own weight, and cannot be applied to a structure that has a folding ladder that is stored without being placed on the lower lid. It was Further, since the upper lid and the lower lid are simultaneously opened from the downstairs side, considerable force is required, which may hinder quick rescue operations. In particular, in a structure in which the upper frame and the lower frame have different openings, since a rope such as a chain is installed in a part of the lower opening mechanism with an inclination, the structure becomes complicated and There was also the problem of hindering the ladder from going up and down.

The present invention has been made in view of the above circumstances, and provides an upper lid opening mechanism and a lower lid opening mechanism in a double ceiling evacuation device that allows the lower lid and the upper lid to be opened from the downstairs side and has a simple structure. That is the purpose.

[0007]

In order to achieve the above object, the upper and lower lid opening mechanisms in the double-ceiling evacuation device of the present invention are provided on a slab such as a floor or a veranda and a ceiling below it. An upper frame and a lower frame that are attached to the opened opening, an upper lid and a lower lid that are pivotally attached to the upper frame and the lower frame so as to be openable and closable, and are folded and housed in the upper frame. In a double ceiling evacuation device comprising a ladder extending to the floor below or in the vicinity thereof and a ladder storage device for pulling up and storing this ladder, an arm rotatably attached to the inner surface of the lower frame. A locking piece for releasably locking the free end portion of the lower lid is hung, and a base end portion of the arm is provided with an opening operation portion that projects downward when the lower lid is closed, Rotatable on the inner surface of the upper frame The opening operation transmitting member to be worn,
The free end of the arm and the free end of the opening movement transmitting member are connected by a connecting rod so as to be releasably engaged with the locking surface of the upper lid locking piece that is hung on the lower surface of the upper lid. It is connected.

In the present invention, the connection between the connecting rod and the arm and the opening movement transmitting member may be fixed, but preferably at least one of the connecting rod and the arm or the opening movement transmitting member is adjustable in length. It is better to connect them.

Further, a stopper piece for horizontally locking the arm is provided on the lower frame side, and an elastic force is constantly urged between the lower frame side and the arm so as to press the arm toward the stopper piece side. It is preferable to provide elastic means. In this case, the elastic means can be formed of, for example, a compression spring or a tension spring.

[0010]

According to the upper and lower lid opening mechanism of the evacuation device of the present invention constructed as described above, the opening operation transmitting member which engages with the upper lid locking piece operates by opening the upper lid. As a result, the arm rotates via the connecting rod, the engagement state between the engagement piece and the free end portion of the lower lid is released, and the lower lid is opened. Further, by pulling downward the opening operation portion that is hung from the arm from the downstairs side, the locking state between the locking piece hung on the arm and the free end of the lower lid is released, and the lower lid is opened. Therefore, when opening the lower lid, the upper lid does not operate, so the lower lid can be opened easily and reliably without requiring strong force, and the ladder is extended from the lower floor to descend from the lower floor. Evacuation to the upper side and rescue activities can be performed.

Further, by connecting at least one of the connecting rod and the arm or the opening movement transmitting member so that the length can be adjusted, the arm and the opening movement transmitting member can be connected in correspondence with the distance between the slab and the ceiling. it can.

Further, a stopper piece for horizontally locking the arm is provided on the lower frame side, and an elastic means for urging an elastic force is arranged between the lower frame side and the arm so as to constantly press the arm toward the stopper piece side. By installing the arm, the upper lid and the lower lid can be surely opened by always holding the arm in a constant state, and the elastic force of the elastic means can be applied when closing the lower lid after housing the ladder. The locking piece and the free end portion of the lower lid can be engaged with each other, and the lower lid can be reliably closed.

[0013]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view of a state of use of the evacuation device having upper and lower lid opening mechanisms of the present invention, FIG. 2 is an enlarged cross-sectional perspective view of an essential part of FIG. 1, and FIG. Figure,
4 and 5 show a schematic side sectional view and a schematic front sectional view, respectively, in a use state.

The evacuation device of the present invention has an opening 1a formed in a slab 1 such as a floor or a veranda, and an opening 2a provided in a ceiling 2 on the downstairs side of the slab 1 and an upper frame 3 and a lower frame 4, respectively. And an upper lid 5 and a lower lid 6 are pivotally attached to the upper frame 3 and the lower frame 4, respectively, so as to be openable and closable, and a pantograph type ladder extending in the upper frame 3 to the floor below or to the vicinity thereof. 7 is folded and stored, and a slow-moving device 8 which constitutes a ladder storage tool for controlling the extension and descending speed of the ladder 7 and pulling up and storing the ladder is provided. Further, the evacuation device is further provided with a lower lid opening mechanism 20 provided in the upper and lower frames 3 and 4, and a ladder extending means 30 connected to the ladder storage releasing portion of the slow mover 8. In this case, the opening 2a in which the lower frame 4 is attached is formed larger than the opening 1a in which the upper frame 3 is attached, and between the upper frame 3 and the lower frame 4, a step in which the lower portion expands. A box-shaped connection housing 9 is provided.

In the ladder 7, a plurality of horizontal rails 7b, 7b for stepping are provided at appropriate intervals between a pair of telescopic bodies 7c, 7c in which a plurality of vertical rails 7a, 7a are pivotally mounted in a pantograph manner. It is constructed so that it can be hung and stored in the upper frame 3 by being folded and can be extended to the floor below or in the vicinity thereof. A hoisting wire 10 is connected between a horizontal rod 7d that is horizontally mounted between the vertical bars 7a on the lower side and a take-up drum (not shown) of the slow mover 8.

As shown in FIG. 2, the upper frame 3 has four side wall members each having an outwardly facing upper flange 3a at the upper end and an outwardly facing L-shaped lower flange 3b at the lower end. 3c is framed in a rectangular shape, and an upper frame member 3d having a substantially crank-shaped cross section is mounted above the upper flange 3a. Further, a fixture 12 is fixed to the inner surface of the side wall member 3c on the ladder attachment side with a fixing bolt 11a and a nut 11b, and the bracket 12a of the fixture 12 is fixed.
The upper end of the uppermost vertical bar 7a of the ladder 7 is attached to the pivot bolt 7e.
Is rotatably pivoted by. When fixing the mounting tool 12, the ladder 7 that has been folded in advance is mounted on the mounting tool 12, so that the mounting work of the mounting tool 12 and the mounting of the ladder 7 can be performed at the same time. The fixture 12
An inclined support piece 12b that abuts and supports the uppermost vertical rail 7a of the ladder 7 is cut and raised on the bracket 12a of the bracket 7, and a guide member 13 for maintaining the extended inclined state of the ladder 7 is provided on the lower end side. It is pivotally attached with a pivot pin 12c. An L-shaped anchor member 3e is fixed to the outer surface of the side wall member 3c of the upper frame 3 by spot welding or the like.

The upper lid 5 is openably and closably attached by the link mechanism 14 attached to the left and right side wall members 3c of the upper frame 3, and is held upright substantially vertically in the opened state. A handle portion 5a is fixedly provided on the inner surface of the upper lid 5 substantially at the center thereof, and a lower lid opening mechanism 20 is provided on one side of the inner surface on the free end side of the upper lid 5 as described later. A mating upper lid locking piece 25 is rotatably hung.

The lower frame 4 is attached to the ceiling opening 2a in a state of being suspended by a suspension bolt 40 suspended from the lower surface of the slab 1. In this case, the suspension bolt 4 fixed to the bracket 42 fixed by the anchor bolt 41 planted on the lower surface of the slab 1 by welding or the like.
The lower frame 4 is attached by fixing the 0s to the brackets 4a protruding at four positions on opposite sides of the lower frame 4 with nuts 43. A stay damper 15 is installed between the lower frame 4 and the lower lid 6, and the opening operation of the lower lid 6 is controlled by the stay damper 15. Further, a pulling chain 16 for pulling up when the opened lower lid 6 is closed is connected between the lower lid 6 and the upper frame 3.

As shown in FIGS. 2 and 5, the slow down device 8 is provided with a known braking mechanism coaxially with the winding drum of the winding wire 10 and mounted coaxially with the winding drum. The release lever 8 which is the ladder storage release portion is attached to the disengaged ratchet wheel 8a.
b has a ratchet mechanism that can engage in only one direction. In the decelerator 8 thus configured, the ladder is extended and lowered by its own weight by pushing down the opening lever 8b to release the engagement with the ratchet wheel 8a. At this time, the extension and descending speed is controlled by the brake mechanism. To be done. Also,
In order to accommodate the extended ladder 7, as shown in FIG. 4, the winding wire 10 is wound by rotating the winding drum by the winding handle 17 that is removably arranged on the inner surface of the upper frame 3. The ladder 7 can be stored by taking it.

Next, the lower lid opening mechanism 20 will be described with reference to FIGS. 6 to 10. Lower lid opening mechanism 2
Reference numeral 0 designates left and right pieces 21a, 21 pivotally rotatably vertically mounted on arm mounting seats 29, 29 fixed to opposing left and right inner side surfaces of the lower frame 4 with a rotation shaft 29a.
a U-shaped arm 21 having b and a base piece 21c, and a protruding pin 28 hanging from the left and right pieces 21a and 21b of the arm 21 and protruding inward from both sides of the free end portion of the lower lid 6. A pair of locking pieces 22 that are detachably locked, a pulling handle 23 for opening that is attached to the center of the base piece 21c of the arm 21 and hangs, and an upper lid locking piece that hangs on the lower surface of the upper lid 5. Opening motion transmitting portion 24 releasably engaged with the locking surface 25a of 25 and left and right pieces 21a, 21b of the arm 21.
One of the two (in the drawing, the case of the right piece 21b) and a connecting rod 26 that connects the opening movement transmitting member 24 constitute a main part.

In this case, the arm mounting seat 29 is bent with upper stopper pieces 29b which come into contact with the upper ends of the left and right pieces 21a and 21b of the arm 21, and the left and right pieces 21a and 21b.
A lower stopper piece 29c that engages with the lower end of 1b is bent, and the arm attachment seat 29 and the right piece 21b of the arm 21 are bent.
The right spring 21b of the arm 21 is constantly in contact with the upper stopper spring 29b by a tension spring 27 stretched between the front end of the arm 21 and the front end thereof to maintain a horizontal state. Therefore, when the lower lid 6 is closed, the protruding pin 28 can hit the inclined guide surface 22a provided at the lower end of the locking piece 22 without being displaced, and the lower lid 6 can be reliably stored.
In this case, a compression spring may be provided between the arm mounting seat 29 and the right end 21b of the arm 21 instead of the tension spring 27.

The opening pull tab 23 is pivotally attached to the arm base piece 21c with a pin 23a, and the lower lid 6 is attached.
When the arm 21 is rotated, a hook member (not shown) is directly hooked to an engagement hole 23b provided at the lower end of the pulling handle 23 for opening which projects below the lower lid 6 in a closed state. Alternatively, the arm 21 can be rotated by pulling the opening chain 23c connected to the engagement hole 23b downward to release the locking state between the locking piece 22 and the protruding pin 28. The pulling handle 23 for opening is provided with the pin 23.
The L-shaped cover 23d attached by a prevents the pin 23a from moving accidentally in the axial direction (see FIG. 11). When the opening chain 23c is attached to the opening pull tab 23, the opening chain 23c may be inadvertently pulled when not in use and may enter from the lower floor to the upper floor. The chain 23c must be stored in a storage box or the like (not shown) provided on the ceiling side so as not to be tampered with.

Opening movement transmitting member 2 of the lower lid opening mechanism 20
As shown in FIGS. 6 to 8, the upper lid locking piece 25 that engages with 4 is pivotally attached to a Z-shaped bracket 25b fixed to the lower surface of the upper lid 5 so as to be rotatable in the vertical direction with a rotation shaft 25c. And a hook-like locking surface 2 provided at the lower end
The lower surface of the opening movement transmission member 24 can be engaged with the upper portion 5a.

In this case, the opening movement transmitting member 24 is attached to the mounting seat 24a fixed to the inner surface of the upper frame 3 by the rotating shaft 24b.
It is pivotally attached so that it can rotate in the vertical direction. By engaging the upper lid locking piece 25 and the opening operation transmitting member 24 in this manner, the opening operation transmitting member 24 engages and rotates only during the opening operation of the upper lid 5, and the connecting rod 26 is interposed. The arm 21 is rotated to open the lower lid 6.

An inclined surface 25d is provided at the lower end of the upper lid locking piece 25, and the inclined surface 25d rides over the opening movement transmitting member 24 to ensure the upper lid locking piece 25.
Can be engaged with the opening movement transmission member 24. The upper lid locking piece 25 abuts on the lower horizontal piece 25e of the bracket 25b to prevent rotation from the vertical position toward the outer side of the upper lid 5. Further, a weight 25f is fixed to the lower side of the upper lid locking piece 25, and when the upper lid 5 is closed by the weight 25f, the upper lid locking piece 25 hangs down by its own weight and surely the opening movement transmitting member. Two
Engage with the lower surface of No. 4. Further, when the upper lid 5 is opened by the weight 25f, the upper lid locking piece 25 can surely rotate in the arrow direction shown in FIG. 7, that is, inward of the upper lid 5 by its own weight. In addition, weight 25f
An inclined contact surface 25g is provided at the tip end of the upper cover 5 so that the inclined contact surface 25g can contact the lower surface of the upper cover 5 when the upper cover 5 is opened and brought into a vertical state.

On the other hand, the connecting rod 26 is the arm right piece 21.
A horizontal piece 2 of an inverted L-shaped lower connecting plate 26b which is rotatably supported in a vertical direction by a rotary shaft 26a on the free end side of b.
6c and the rotary shaft 26 on the free end side of the opening movement transmission member 24.
It is formed of a connecting bolt that is screwed to a horizontal piece 26f of an L-shaped upper connecting plate 26e that is rotatably supported in the vertical direction with d. That is, both ends of the connecting rod 26 penetrate through the through holes (not shown) provided in the horizontal pieces 26f and 26c of the upper connecting plate 26e and the lower connecting plate 26b, and are formed on the upper and lower surfaces of the horizontal pieces 26f and 26c. The nuts 26g and 26h are screwed to each other and can be adjusted according to the dimension between the slab 1 and the ceiling 2 (height dimension between double ceilings).

Although the upper and lower ends of the connecting rod 26 are screwed to the nuts 26g and 26h respectively in the above embodiment, both ends of the connecting rod 26 are not necessarily the nuts 26g and 26h.
It is not necessary to screw-connect to 6h, and at least one end may be screw-connected to the nuts 26g and 26h.

The ladder extending means 30 is composed of a ladder extending chain, one end of which is connected to an opening lever 8b which engages with the ratchet wheel 8a of the decelerator 8. The ladder extending chain 30 is placed on the lower lid 6 when the ladder is stored, and hangs downward when the lower lid 6 is opened. Therefore, the ladder 30 can be extended and lowered by pulling the ladder extension chain 30 from the downstairs side to release the engagement between the release lever 8b and the ratchet wheel 8a.

As shown in FIGS. 3 and 12, the connection housing 9 includes a stepped box-shaped auxiliary frame 9b connected to the upper frame 3 by a connecting bolt 9a, and the auxiliary frame 9b and the lower frame 4. 4 blind panels 9c attached between each side and a blind panel 9
and an angle member 9d for fixing the adjacent corners of c. The blind panel 9c of the connection housing 9 configured as described above
Is a Z-shaped panel receiver 4 projecting from the inner surface of the lower frame 4.
The fixing nut 9 is fixed to the fixing bolt 9h which is placed on the upper side of the fixing bolt 9b and which penetrates the slit 9e provided on the upper end side thereof and the mounting hole 9g formed in the hanging flange 9f of the auxiliary frame 9b.
It is attached by screwing i. in this case,
The blind panel 9c can be attached by fixing the fixing nut 9i to the mounting hole 9g by welding or the like and fastening the fixing bolt 9h from the inside of the connection housing 9. It should be noted that the mounting hole 9g may be burred instead of the fixing nut 9i to provide a screw portion. Therefore,
The blind panel 9c can be attached corresponding to the distance between the slab 1 and the ceiling 2, and the opening can be blocked from the space between the slab 1 and the ceiling 2.

A lower lid cushioning member 18 made of stainless steel is attached to the bent edge 6a of the lower lid 6 to prevent damage due to rubbing when the ladder 7 is moved up and down.

Next, the use operation and the storage operation of the evacuation device of the present invention will be described with reference to FIG.

When operating from the upper side of the floor When the upper lid 5 is opened from the unused state, the engaging surface 25a of the upper lid engaging piece 25 is transmitted along with the opening operation of the upper lid 5 (direction of arrow A). The member 24 is pulled up (in the direction of arrow B), and the connecting rod 26 is rotated as the opening motion transmitting member 24 rotates.
Rises (arrow C direction), and the arm 21 rotates in the arrow D direction. When the locking piece 22 rises with the rotation of the arm 21 and the locked state with the protruding pin 28 is released, the lower lid 6 is opened by its own weight, as shown by arrow E. Next, if the release lever 8b of the slow mover 8 is pushed down to release the engagement with the ratchet wheel 8a, the ladder 7 is extended and lowered, and it is possible to evacuate downstairs.

When operating from the downstairs side When pulling the opening operation pulling tab 23 downward from the unused state, the arm 21 rotates in the clockwise direction (arrow F direction) in the figure. When the locking piece 22 rises with the clockwise rotation of the arm 21 and the locking state with the protruding pin 28 is released,
Similar to the above operation, as shown by arrow G, the lower lid 6 is opened by its own weight. Since the ladder extension chain 30 hangs downstairs as the lower lid 6 is opened, the ladder extension chain 30 is pulled to release the engagement between the release lever 8b of the decelerator 8 and the ratchet wheel 8a. Is extended and lowered. It is possible to go upstairs from the lower floor side to the upper floor by pushing the upper lid 5 open by climbing the ladder 7, and it is possible to perform evacuation and rescue activities from the lower floor side to the upper floor side.

The connecting rod 26 moves up (arrow G direction) as the arm 21 rotates clockwise (arrow H direction), and the opening movement transmitting member 24 rotates in the arrow I direction. The upper lid 5 remains closed because it is not engaged with the piece 25.

When storing the extended ladder 7, first, the winding drum 10 is rotated by the winding handle 17 from the upper side of the floor to wind up the winding wire 10 and the ladder 7 is stored. Pull up. After that, when the pulling chain 16 is pulled and the lower lid 6 is closed, the projecting pin 28 hits the inclined guide surface 22a of the locking piece 22 and pushes the locking piece 22 away against the elastic force of the tension spring 27. After that, the protruding pin 28 is locked to the locking piece 22. When the upper lid 5 is closed, the storage operation of the ladder 7 is completed.

Although the ladder 7 is of the pantograph type in the above embodiment, the ladder does not necessarily have to be of the pantograph type but may be of the telescopic type. Further, in the above-described embodiment, the structure in which the connection housing 9 is provided between the upper frame 3 and the lower frame 4 has been described, but the connection housing 9 does not necessarily have to be provided.

[0038]

As described above, according to the upper and lower lid opening mechanisms of the evacuation device of the present invention, which are configured as described above, the following effects can be obtained.

1) According to the evacuation device according to the first aspect, a locking piece for locking the free end of the lower lid in a disengageable manner is attached to the arm pivotally mounted on the inner surface of the lower frame. An opening operation portion that hangs down and projects downward when the lower lid is closed is provided at the base end portion of the arm, and an opening movement transmission member rotatably attached to the inner surface of the upper frame is provided above the arm. It engages releasably on the locking surface of the upper lid locking piece that hangs on the lower surface of the lid, and connects the free end of the arm and the free end of the opening movement transmitting member with a connecting rod. Therefore, the upper and lower lids can be opened from the downstairs side, and evacuation and rescue activities from the downstairs side to the upstairs side can be enabled. Further, the upper and lower lids can be opened easily and surely without requiring a strong force, and the structure is simple, so that there is no hindrance to elevating or lowering during evacuation or rescue.

2) According to the evacuation device of the second aspect, since at least one of the connecting rod and the arm or the opening movement transmitting member is connected so that the length thereof can be adjusted, the arm is connected to the slab and the ceiling in correspondence with the distance. It is possible to connect with the opening motion transmission member, and it is possible to facilitate the installation work on site.

3) According to the evacuation device of claim 3, a stopper piece for horizontally locking the arm is provided on the lower frame side, and the arm is constantly pressed to the stopper piece side between the lower frame side and the arm. Since elastic means for urging elastic force is arranged as much as possible,
By holding the arm always in a constant state, the upper lid and the lower lid can be reliably opened, and the lower lid can be reliably closed when the ladder is stored.

[Brief description of drawings]

FIG. 1 is a perspective view showing a use state of an evacuation device having upper and lower lid opening mechanisms of the present invention.

FIG. 2 is an enlarged sectional perspective view of a main part of FIG.

FIG. 3 is a sectional view showing a stored state of the ladder in the present invention.

FIG. 4 is a schematic side sectional view showing a use state of the evacuation device.

5 is a front sectional view of a main part of FIG.

FIG. 6 is an exploded perspective view showing the relationship between the upper lid and the lower lid and the opening mechanism portion in the present invention.

FIG. 7 is a sectional view showing an engaged state of the upper lid and the opening mechanism portion in the present invention.

8 is a cross-sectional view taken along the line VIII-VIII of FIG.

FIG. 9 is a sectional view showing an engaged state of the lower lid and the opening mechanism portion in the present invention.

10 is a cross-sectional view taken along line XX of FIG.

FIG. 11 is a cross-sectional perspective view showing the attached state of the pulling handle for opening operation according to the present invention.

FIG. 12 is an exploded perspective view showing an upper frame, a lower frame and a connection housing according to the present invention.

FIG. 13 is an explanatory diagram showing an operation mode of an upper lid and a lower lid.

[Explanation of symbols]

 1 Slab 1a Opening 2 Ceiling 2a Opening 3 Upper Frame 4 Lower Frame 5 Upper Lid 6 Lower Lid 7 Ladder 8 Lowering Mechanism (Ladder Storage) 20 Lower Lid Opening Mechanism 21 Arm 22 Locking Piece 23 Opening Pull 24 Transmission arm (opening movement transmission part) 25 Upper lid locking piece 25a Locking surface 26 Connecting rod 28 Projecting pin

Front Page Continuation (72) Inventor Nobuyoshi Oba 1-1-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Naka Technical Research Institute Co., Ltd.

Claims (3)

[Claims] 1. A slab such as a floor or a veranda and an upper frame and a lower frame attached to openings provided in a ceiling below the floor, and an upper part pivotably attached to the upper frame and the lower frame so as to be openable and closable, respectively. A double-ceiling evacuation including a lid and a lower lid, a ladder that is folded and stored in the upper frame and that extends to or near the floor below and a ladder storage device that pulls up and stores the ladder. In the device, an arm rotatably attached to the inner surface of the lower frame,
A locking piece that releasably locks the free end portion of the lower lid is hung, and an opening operation portion that projects downward when the lower lid is closed is provided at the base end portion of the arm. An opening motion transmitting member rotatably pivotally attached to an inner surface of the upper frame, and releasably engaged with an engaging surface of an upper lid engaging piece that is hung on a lower surface of the upper lid. The upper and lower lid opening mechanism in the double ceiling evacuation device, characterized in that the free end of the above and the free end of the opening movement transmitting member are connected by a connecting rod. 2. The upper / lower lid opening mechanism in the double ceiling evacuation device according to claim 1, wherein at least one of the connecting rod and the arm or the opening movement transmitting member is connected so that the length thereof can be adjusted. . 3. A stopper piece for horizontally locking the arm is provided on the lower frame side, and an elastic member is provided between the lower frame side and the arm to constantly apply an elastic force to press the arm toward the stopper piece side. The upper and lower lid opening mechanism in the double-ceiling evacuation device according to claim 1, further comprising means.