JP3220731B2 - Double ceiling evacuation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double ceiling evacuation system, and more particularly, to a slab such as a floor or a veranda and an upper and lower slab attached to an opening provided in a ceiling below the floor. The present invention relates to an evacuation device for a double ceiling in which a ladder can be extended and lowered.

[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 and a veranda and a ceiling below the floor, a slab such as a floor and a veranda and the ceiling below the floor are used. An upper frame and a lower frame attached to the openings provided respectively; an upper lid and a lower lid pivotally connected to the upper frame and the lower frame, respectively; It is known to have, for example, a pantograph ladder that extends to or near the floor below when the lid and lower lid are opened. It is possible to reduce the outer shape of the upper frame that houses the ladder in order to reduce the size of the evacuation device for double ceilings configured in this way, but in order to make the extended ladder easy to go 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, the evacuation device constructed as described above has an interlocking structure in which the lower lid is generally opened with the opening of the upper lid in consideration of privacy. The structure cannot be opened. Therefore, there has been a problem that evacuation from a lower floor of a basement or the like to an upper floor or a rescue operation of a rescuer from a lower floor cannot be sufficiently performed.

[0004] As means for solving this problem, for example,
Attach the opening tab to one end of the rotating arm pivotally attached to the inner surface of the lower frame, engage the other end with the upper lid, and lower the opening tab to open the upper lid from the lower floor. At the same time, a structure in which the lower lid is opened and the ladder is lowered can be considered.

[0005]

However, in a conventional evacuation device having a lower lid opening mechanism, the ladder must be lowered with the opening of the lower lid.
There is a problem that the ladder is limited to the 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 having a folding ladder that is stored without being placed on the lower lid. Was. Further, since the upper lid and the lower lid are simultaneously opened from the downstairs side, a considerable amount of force is required, and there is a possibility that quick rescue operations may be hindered. Particularly, in the case of a structure in which the opening of the upper frame and the opening of the lower frame are different from each other, a rope such as a chain is arranged in a part of the lower opening mechanism at an angle, so that the structure becomes complicated and the inside of the opening is reduced. There was also a problem that it would hinder the elevating of the ladder.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a double ceiling evacuation device in which a lower lid and an upper lid are opened from a lower floor, a ladder can be extended, and the structure is simplified. It is intended for.

[0007]

In order to achieve the above object, an evacuation device for a double ceiling according to the present invention is mounted on a slab such as a floor or a veranda, and has an upper frame having an upper lid on an upper surface; A lower frame that is attached to an opening provided on the ceiling on the lower floor of the slab and has a lower lid on the lower surface and communicates with the upper frame, and is folded and stored in the upper frame, A ladder extending to or near the floor below,
A ladder storing tool for pulling housing the ladder, engaging to disengageably lock the free end portion of the lower lid attached to the lower member
And locking piece, attached to the upper lids are linked with the locking piece, and a lower lid opening mechanism having an upper lid opening operation transmitting portion for engaging with the upper cover only the opening operation of the upper lid, the ladder storage equipment along with being connected in a ladder accommodating release portion, of the lower lid
It is placed on the upper side and is hung downward when the lower lid opens.
And a ladder extending means for hanging the ladder downstairs.

[0008] In the present invention, it is preferable that the ladder storage device is formed by a slower having a slower function for controlling the elongating and lowering speed of the ladder.

Further, it is preferable that the lower lid opening mechanism is provided with an opening operation section protruding downstairs.

[0010]

According to the evacuation device of the present invention configured as described above, by opening the upper lid, the upper lid opening operation transmitting portion of the lower lid opening mechanism is engaged and operates. The locked state between the lower lid opening mechanism and the free end of the lower lid is released, the lower lid is opened, and the ladder can be extended and lowered by releasing the ladder storage releasing portion of the ladder storage tool. Further, by operating the lower lid opening mechanism from the downstairs side, the locked state of the lower lid opening mechanism and the free end of the lower lid is released, and the lower lid is opened, and the ladder of the ladder storage device is opened by the ladder extending means. By releasing the engagement of the storage release part,
The ladder can be extended and lowered. Therefore, it is possible to extend and descend the ladder from the downstairs to perform evacuation and rescue activities from the downstairs to the upstairs.

[0011] Further, by forming the ladder storage device with a slowing device having a slowing-down function for controlling the slowing-down speed of the ladder, the slowing-down speed of the ladder can be achieved.
In particular, the ladder extension operation from the downstairs side can be made safe.

Further, by providing the lower lid opening mechanism with an opening operation part protruding downward, the lower lid can be easily opened from the lower floor, and the upper lid can be opened to perform evacuation and rescue activities. Can be.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view of the use state of the evacuation device of the present invention, FIG. 2 is an enlarged cross-sectional perspective view of the main part of FIG. 1, FIG. 3 is a side cross-sectional view of the storage state of the ladder, and FIGS. A schematic side sectional view and a schematic front sectional view in a used state are shown.

The evacuation device according to the present invention has an upper frame 3 and a lower frame 4 in an opening 1a formed in a slab 1 such as a floor and a veranda, and an opening 2a formed in a ceiling 2 on the lower floor of the slab 1 respectively. And an upper lid 5 and a lower lid 6 are pivotally attached to the upper frame 3 and the lower frame 4 so as to be openable and closable, respectively, and the pantograph ladder extends to the lower floor or the vicinity thereof in the upper frame 3. The ladder 7 is folded and housed, and the elevating device 8 which controls the elongating and lowering speed of the ladder 7 and constitutes a ladder storage device for raising and storing the ladder 7 is provided. Further, the evacuation device further includes a lower lid opening mechanism 20 provided in the upper and lower frames 3 and 4,
Ladder extending means 30 connected to the ladder storage release portion of the ladder. In this case, the opening 1 to which the upper frame 3 is attached
The opening 2a to which the lower frame 4 is attached to the ladder 7
The upper frame 3 and the lower frame 4 are formed between the upper frame 3 and the lower frame 4, and a stepped box-shaped connection housing 9 whose lower part expands is disposed between the upper frame 3 and the lower frame 4.

The ladder 7 is provided with a plurality of stepping horizontal rails 7b, 7b,... At appropriate intervals between a pair of telescopic members 7c, 7c in which a plurality of vertical rails 7a, 7a. It can be folded and stored in the upper frame 3 and can be extended to the floor below or near the floor. In addition, a hoisting wire 10 is connected between a horizontal rod 7d suspended between the lower vertical bars 7a and a winding drum (not shown) of the elevator 8.

As shown in FIG. 2, the upper frame 3 has an outwardly directed upper flange 3a at the upper end and four outwardly bent L-shaped lower flanges 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. An attachment 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.
The upper end of the vertical bar 7a at the top of the ladder 7 is a pivot bolt 7e.
Is rotatably supported by When the fixture 12 is fixed, the ladder 7 that has been folded in advance is attached to the fixture 12, so that the ladder 7 can be attached simultaneously with the fixing work of the fixture 12. In addition, the mounting fixture 12
The bracket 12a is provided with an inclined support piece 12b for abutting and supporting the uppermost vertical rail 7a of the ladder 7, and a guide member 13 for maintaining the inclined state of the extended ladder 7 is provided on the lower end side. It is pivotally mounted 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 mounted to be openable and closable by a link mechanism 14 mounted on the left and right side wall members 3c of the upper frame 3, and is held substantially vertically in an open state. A handle portion 5a is fixedly provided substantially at the center inner side surface of the upper lid 5, and one side of the inner surface on the free end side of the upper lid 5 is engaged with a lower lid opening mechanism 20 as described later. The upper lid engaging piece 25 is rotatably suspended.

The lower frame 4 is attached to the ceiling opening 2a while being suspended by suspension bolts 40 suspended from the lower surface of the slab 1. In this case, a suspension bolt 4 fixed by welding or the like to a bracket 42 fixed with an anchor bolt 41 implanted on the lower surface of the slab 1
The lower frame 4 is attached by fixing nuts 43 to brackets 4a projecting from four locations on both sides of the lower frame 4 opposite to each other. Further, a stay damper 15 is provided between the lower frame 4 and the lower cover 6, and the opening operation of the lower cover 6 is controlled by the stay damper 15. A pull-up chain 16 is connected between the lower lid 6 and the upper frame 3 for pulling up when the opened lower lid 6 is closed.

As shown in FIG. 2 and FIG. 5, the slower 8 has a known brake mechanism coaxially with the winding drum of the winding wire 10 and is mounted coaxially with the winding drum. Release lever 8 which is a ladder storage release part on the set ratchet wheel 8a
b has a ratchet mechanism capable of engaging in only one direction. When the release lever 8b is pressed down to release the engagement with the ratchet wheel 8a, the ladder is extended and lowered by its own weight in the thus configured lifting device 8, and at this time, the elongating and descending speed is controlled by the brake mechanism. Is done. Also,
In order to store the elongated ladder 7, as shown in FIG. 4, the winding wire 10 is wound by rotating the winding drum by a winding handle 17 which is detachably disposed on the inner surface of the upper frame 3. The ladder 7 can be stored.

Next, the lower lid opening mechanism 20 will be described with reference to FIGS. Lower lid opening mechanism 2
Reference numeral 0 denotes left and right pieces 21a, 21 pivotally attached to arm mounting seats 29, 29, which are fixed to opposed positions on the left and right inner surfaces of the lower frame 4 so as to be rotatable in a vertical direction with a rotation shaft 29a, respectively.
b and a base 21c, and a protruding pin 28 which is suspended from left and right pieces 21a and 21b of the arm 21 and protrudes inward from both sides of the free end of the lower lid 6. An inclined guide surface 2 is provided on a pair of lower ends which are detachably locked.
2a, a hook 23 for opening operation (opening operation unit) attached to the center of the base 21c of the arm 21 and hanging therefrom, and an upper lid hanging down on the lower surface of the upper lid 5 Stop piece 25 and locking surface 25 of this upper lid locking piece 25
an upper lid opening operation transmitting section 50 having a transmitting arm 24 removably engaged with the upper and lower arms 21a, 21a of the arm 21;
A main part is constituted by one of the members 21b (the right piece 21b is shown in the figure) and a connecting rod 26 connecting the upper lid opening operation transmitting part 50.

In this case, an upper stopper piece 29b abutting on the upper ends of the left and right pieces 21a and 21b of the arm 21 is bent on the arm mounting seat 29, and the left and right pieces 21a and 2b are bent.
The lower stopper piece 29c which engages with the lower end of the arm 1b is bent, and the arm mounting seat 29 and the right piece 21b of the arm 21 are bent.
The right side 21b of the arm 21 is always in contact with the upper stopper piece 29b by a tension spring 27 stretched between the front end of the arm 21 and the upper end of the arm 21 so that the horizontal state is maintained. Therefore, when closing the lower lid 6, the projecting pin 28 can contact the inclined guide surface 22 a provided at the lower end of the locking piece 22 without shifting, so that the storage of the lower lid 6 can be ensured.

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

As shown in FIGS. 6 to 8, the upper lid locking piece 25 which engages with the lower lid opening mechanism 20 has a rotating shaft 25c mounted on a Z-shaped bracket 25b fixed to the lower surface of the upper lid 5.
And the transmission arm 24 is rotatably mounted on a hook-shaped locking surface 25a provided at the lower end.
Are engaged with each other. The upper lid locking piece 25 and the transmission arm 24 constitute an upper lid opening operation transmitting section 50.

In this case, the transmission arm 24 is pivotally mounted on a mounting seat 24a fixed to the inner surface of the upper frame 3 so as to be rotatable in a vertical direction with a rotation shaft 24b. By engaging the upper lid locking piece 25 and the transmission arm 24 in this manner, the transmission arm 24 is engaged and rotated only when the upper lid 5 is opened, and the arm 21 is connected via the connecting rod 26. The lower lid 6 is opened by rotation.

An inclined surface 25d is provided at the lower end of the upper lid locking piece 25, and the upper lid locking piece 25 is securely engaged with the transmission arm 24 by crossing the transmission arm 24 by the inclined surface 25d. It is possible to do. The upper lid locking piece 25 is a lower horizontal piece 25 of the bracket 25b.
e, rotation from the vertical position to the outside of the upper lid 5 is prevented. Further, a weight 25f is fixed to a 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 the transmission arm 24 is securely fixed. Engage with the lower surface.
Further, when the upper lid 5 is opened by the weight 25f, the upper lid locking piece 25 can be reliably rotated in the direction of the arrow shown in FIG. An inclined contact surface 25g is provided at the tip of the weight 25f 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 is in a vertical state. Has become.

On the other hand, the connecting rod 26 is
b of the lower L-shaped lower connecting plate 26b pivotally supported on the free end side of the lower connecting plate 26b so as to be rotatable in the vertical direction with the rotating shaft 26a.
6c and a connecting bolt screw-connected to a horizontal piece 26f of an L-shaped upper connecting plate 26e pivotally supported on the free end side of the transmission arm 24 in the vertical direction with a rotating shaft 26d. I have. That is, both ends of the connecting rod 26 are the horizontal pieces 26 of the upper connecting plate 26e and the lower connecting plate 26b.
f, 26c, and is screwed to nuts 26g, 26h disposed on the upper and lower surfaces of the horizontal pieces 26f, 26c, respectively, to connect the slab 1 and the ceiling 2 with each other. It can be adjusted according to the size between them (the height between the double ceilings).

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

The ladder extending means 30 is composed of a ladder extending chain having one end connected to an opening lever 8b which engages with a ratchet 8a of the elevator 8. The ladder extension chain 30 is placed on the lower lid 6 when the ladder is stored, and is hung downward when the lower lid 6 is opened. Therefore, the ladder 7 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 has a stepped box-shaped auxiliary frame 9b which is connected to the upper frame 3 with connecting bolts 9a, and the auxiliary frame 9b and the lower frame 4. Four blind panels 9c attached between each side, and blind panels 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 protruding from the inner surface of the lower frame 4.
b, and is fixed to a fixing bolt 9h passing through a slit 9e provided on the upper end side thereof and a mounting hole 9g formed in a hanging flange 9f of the auxiliary frame 9b.
It is attached by screwing i. in this case,
A fixing nut 9i is fixed to the mounting hole 9g by welding or the like, and a fixing panel 9c is attached by fastening a fixing bolt 9h from inside the connection housing 9. The mounting hole 9g may be burred to provide a screw portion instead of the fixing nut 9i. Therefore, the blind panel 9c can be attached corresponding to the interval 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 buffer member 18 made of stainless steel is attached to the bent edge 6a of the lower lid 6 to prevent damage due to abrasion when the ladder 7 moves up and down.

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

When the upper lid 5 is opened from a non-use state when the upper lid 5 is opened from the floor above, the locking surface 25a of the upper lid locking piece 25 is moved by the transmission arm 24 with the opening operation of the upper lid 5 (in the direction of arrow A). Is pulled up (in the direction of arrow B), and the connecting rod 26 rises with the rotation of the transmission arm 24 (arrow C).
Direction), the arm 21 is rotated in the direction of arrow D. Arm 2
When the locking piece 22 rises with the rotation of 1 and the locked state with the protruding pin 28 is released, as shown by an arrow E, the lower lid 6
Is released by its own weight. Next, if the release lever 8b of the elevating device 8 is pushed down to release the engagement with the ratchet wheel 8a, the ladder 7 is released.
Is extended and lowered, and can be evacuated downstairs.

When operating from the downstairs side When the pulling handle 23 is pulled downward from the unused state, the arm 21 rotates clockwise (the direction of arrow F) 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,
Similarly to the above operation, the lower lid 6 is opened by its own weight as shown by the arrow G. When the lower lid 6 is opened, the ladder extension chain 30 hangs downstairs, so that the ladder extension chain 30 is pulled to release the engagement between the release lever 8b of the relaxer 8 and the ratchet wheel 8a. Is extended and lowered. By climbing up the ladder 7 and pushing the upper lid 5 open, it is possible to exit from the lower floor to the upper floor, and to perform evacuation and rescue activities from the lower floor to the upper floor.

The connecting rod 26 rises (in the direction of arrow G) as the arm 21 rotates clockwise (in the direction of arrow H), and the transmission arm 24 rotates in the direction of arrow I. , The upper lid 5 remains closed.

When storing the extended ladder 7, first, the winding drum is rotated by the hoisting handle 17 from the upper floor, and the hoisting wire 10 is wound, and the ladder 7 is stored. Pull up. Thereafter, when the pull-up chain 16 is turned to close the lower lid 6, the projecting pin 28 hits the inclined guide surface 22 a of the locking piece 22 and pushes the locking piece 22 against the elastic force of the tension spring 27. Thereafter, the protruding pin 28 is locked by the locking piece 22. Then, when the upper lid 5 is closed, the storing operation of the ladder 7 is completed.

In the above embodiment, the case where the ladder 7 is of a pantograph type has been described. However, the ladder does not necessarily need to be of a pantograph type, but may be of a 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 always need to be provided.

[0038]

As described above, according to the evacuation device of the present invention, the following effects can be obtained since the evacuation device is configured as described above.

According to the first aspect of the present invention, the lower lid can be opened from the lower floor and the ladder can be extended and lowered, so that evacuation and rescue from the lower floor to the upper floor can be performed. Activities can be enabled. In addition, since the lower lid opening mechanism can be arranged in a narrow space inside the storage frame, the evacuation device does not become unnecessarily large, and the existing upper and lower lid interlocking type can be easily used. Can be remodeled.

2) According to the double ceiling evacuation device, the ladder storage device is formed by a slowing device having a slowing down function for controlling the speed of extension and descent of the ladder. The descending speed can be slow, and the ladder extension operation from the downstairs side can be made particularly safe.

According to the third aspect of the present invention, since the lower lid opening mechanism is provided with the opening operation portion protruding downstairs, the lower lid can be easily opened from the downstairs side. The upper lid can be opened, and evacuation and rescue operations can be performed quickly.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use state of an evacuation device 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 a ladder according to the present invention.

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

FIG. 5 is a front sectional view of a main part of FIG. 4;

FIG. 6 is an exploded perspective view showing a lower lid opening mechanism according to the present invention.

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

FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a sectional view showing an engagement state between the lower lid and the lower lid opening mechanism according to the present invention.

FIG. 10 is a sectional view taken along the line XX of FIG. 9;

FIG. 11 is a cross-sectional perspective view showing a mounting state of an opening operation pull tab 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 the lower lid opening mechanism.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 slab 1a opening 2 ceiling 2a opening 3 upper frame 4 lower frame 5 upper lid 6 lower lid 7 ladder 8 relaxer (ladder storage device) 8b release lever (ladder storage release part) 20 lower lid opening mechanism 21 arm 22 Locking piece 23 Opening pull tab 24 Transmission arm 25 Upper lid locking piece 25a Locking surface 26 Connecting rod 28 Protruding pin 30 Ladder extending chain (ladder extending means) 50 Upper lid opening operation transmitting section

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shinetsu Oba 1-1-1, Uchisaiwai-cho, Chiyoda-ku, Tokyo, Japan Inside Naka Technical Research Institute (56) References JP-A-52-99700 (JP, A) 52-33400 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A62B 5/00 E06C 9/14

Claims (3)

(57) [Claims] 1. An upper frame which is attached to a slab such as a floor or a veranda and has an upper lid on an upper surface, and which is attached to an opening provided on a ceiling below the slab and has a lower lid on a lower surface. A lower frame that is communicated with the upper frame, and is folded and stored in the upper frame, and extends to a floor below or near the floor, and a ladder storage device that pulls up and stores the ladder, a locking piece which disengageably locking the free end portion of the lower lid mounted on the lower frame, the engaging attached to the upper lids
In conjunction with the stop piece , a lower lid opening mechanism having an upper lid opening operation transmitting portion that engages only with the upper lid opening operation with the upper lid, and is connected to the ladder storage release section of the ladder storage tool ,
It is placed on the lower lid and lowers when the lower lid opens.
And a ladder extending means for hanging the ladder downstairs. 2. The evacuation system for a double ceiling according to claim 1, wherein the ladder storage device is formed by a slowing device having a slowing function for controlling the elongating and lowering speed of the ladder. 3. The double ceiling evacuation device according to claim 1, wherein the lower lid opening mechanism is provided with an opening operation section protruding downward.