JPH0568718A - Opening and closing structure of lid in evacuation equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] Ensure the opening and closing of the upper and lower lids that are attached to the slab and pivotally attached to the storage frame that stores the ladder, and reduce the number of attachment members for the opening and closing parts and facilitate the installation work. .. [Structure] A bell crank 10 is pivotally attached to a storage frame 2. The upper link 11 is pivotally attached to the upper end of the bell crank 10 and the upper lid 3. The lower link 12 is pivotally attached to the lower end of the bell crank 10 and the lower lid 4. A pivotally connecting portion between the lower link 12 and the lower lid 4 is formed so as to be slidable along the longitudinal direction of the lower link 12. Thereby, even if the lower lid 4 rotates in the closing direction when opened, the closing movement of the upper lid 3 can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing structure for a lid in an evacuation device, and more specifically to a floor side and a ceiling of a storage frame attached to holes formed in a slab such as a floor or a veranda. The present invention relates to the improvement of the opening / closing structure of the lid of the evacuation device in which the upper and lower lids are pivotally attached to the surface side, respectively.

[0002]

2. Description of the Related Art Generally, a floor,
A storage frame attached to a hole formed in a slab such as a veranda, upper and lower lids pivotally attached to the floor surface side and the ceiling surface side of the storage frame, and folded in the storage frame. When it is stored and the upper and lower lids are opened,
It is known to have a ladder that extends to the floor below or to the vicinity thereof.

In the evacuation device constructed as described above, the lower lid is generally constructed so that it can be opened and closed in conjunction with the opening and closing of the upper lid, and a link mechanism is used as the opening and closing structure. This link mechanism includes an intermediate link pivotally attached to the storage frame, an upper link pivotally attached to an upper end of the intermediate link and an upper lid, and a lower link pivotally attached to a lower end of the intermediate link and a lower lid. And three links (see Japanese Utility Model Publication No. 1-59150 and Japanese Utility Model Publication No. 1-87768).

Further, in the conventional opening / closing structure of this type,
As a stopper mechanism that maintains the state when the upper lid is opened,
A lock body for the upper lid is provided separately (actual flat 1-59
No. 150)), or one in which a stopper member is projectingly provided on the storage frame to be engaged with the link (actual open flat 1-87768)
(See Japanese Patent Publication) and the like are known.

[0005]

However, in the conventional opening / closing structure of this type, since the lower link and the lower lid are pivotally attached only in a rotatable state, the lower lid is closed by wind pressure when closed. There is a risk that when the force is received, the force is transmitted to the upper lid via the link mechanism and the upper lid is closed.

Further, in the conventional opening / closing structure of this type, there is a problem that it takes a lot of time to attach the link because the pivotally connecting portion of each link is connected by the bolt and the nut. Moreover, since the rotation movement of the links is hindered by the fastening of the bolts and nuts, it is necessary to fasten them with a slight clearance, so when the horizontal load for closing the upper lid is applied, the links sway from side to side. However, there is a problem that the vibration is transmitted to the upper lid and rattling occurs in the upper lid. In this case, by using a stepped bolt, the nut can be tightened until it hits the stepped portion of the bolt, so the installation work can be easier compared to the former one, and a screw can be attached to the stepped portion. Since there is no part, there is an advantage that the sliding surface can be protected. However, since there is a gap between the links, the problem that the upper lid rattles when the horizontal load is applied to the upper lid as in the former case is unavoidable.

Therefore, as a means for solving the rattling of the upper lid, it is conceivable to use a rivet at the pivotally connecting portion between the links, but in the case of using a rivet, the rivet is used for the horizontal load applied to the upper lid. A compressive load is applied to the pivotal part, and the compressive load tries to bend the rivet fastening part.In the case of a plate-shaped link, the link deforms due to the surface pressure of the plate, and the deformation of the link opens and closes the upper and lower lids. There is a problem that it interferes with.

Further, in the conventional opening / closing structure of this kind, it is necessary to separately provide a stopper mechanism for preventing the closing movement of the upper lid at the time of opening, so that the structure becomes complicated and the assembling work becomes complicated. In addition to the above problem, there is a possibility that the space inside the storage frame may be narrowed and the storage of other components such as a ladder may be hindered.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an opening / closing structure for a lid of an evacuation device that can surely maintain an open state and that has a reduced number of constituent members for easy mounting. It is what

[0010]

In order to achieve the above object, the lid opening / closing structure in the evacuation device of the present invention is a floor,
A storage frame attached to a hole formed in a slab such as a veranda, upper and lower lids pivotally attached to the floor surface side and the ceiling surface side of the storage frame, and folded in the storage frame. When it is stored and the upper and lower lids are opened,
In an evacuation device including a downstairs floor or a ladder extending to the vicinity thereof, a bell crank pivotally attached to the storage frame, and an upper link pivotally attached to an upper end of the bell crank and the upper lid, A lower link pivotally attached to the lower end of the bell crank and the lower lid, and a pivotally attached portion of the lower link and the lower lid is formed slidably along the longitudinal direction of the lower link. It will be.

In the present invention, the bell crank may be pivotally attached to the upper and lower links as long as it can rotate in the vertical direction, but preferably, the pivot portion of the bell crank and the upper and lower links is A tubular pivot is formed on one of the bell crank or the upper and lower links that are in contact with each other, and the tubular pivot is fitted into a through hole provided on the other of the pivotally attached portions and It is better to bend the protruding part of the shaft outward and pivotally connect it.

A method of forming a stopper piece at the end of the upper link that is pivotally connected to the bell crank to engage with the bell crank so as to prevent the closing movement of the upper lid when the upper lid is opened. Is preferred.

The bell crank and the upper and lower links may be plate-shaped, but it is preferable to form bent pieces for reinforcement at least on both side edges of the bell crank and the upper link. ..

[0014]

According to the lid opening / closing structure of the present invention constructed as described above, the bell crank pivotally attached to the storage frame and the upper link pivotally attached to the upper end of the bell crank and the upper lid. A lower link that is pivotally attached to the lower end of the bell crank and the lower lid, and the pivotally connecting portion of the lower link and the lower lid is slidable along the longitudinal direction of the lower link. , Even if the lower lid receives wind pressure when opening,
It can be absorbed at the pivotal connection between the bell crank and the lower link to prevent the closing movement of the upper lid.

Further, at the pivotal joint between the bell crank and the upper and lower links, a tubular pivot is formed at one of the bell crank or the upper and lower links, and the tubular pivot is provided at the other pivotal joint. By inserting it into the through hole and bending the protruding part from the through hole outward, it is possible to reduce the number of constituent members of the pivotally connected part, reduce the mounting work, and increase the upward movement. The horizontal load acting on the lid can prevent rattling between the bell crank and the link.

Further, by forming a stopper piece at the end of the upper link which is pivotally connected to the bell crank, the stopper piece engaging with the bell crank so as to prevent the closing movement of the upper lid when the upper lid is opened. It is possible to reliably prevent the closing movement of the upper lid when opening, and since it is not necessary to separately provide a stopper mechanism, the structure is simplified and the space in the storage frame can be effectively used.

[0017]

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

FIG. 1 is a perspective view of a state of use of the evacuation device having the lid opening / closing structure of the present invention, FIG. 2 is an enlarged side view of a main part of the lid opening / closing structure, and FIG. 3 is a sectional view of the lid closing state. It is shown.

The evacuation device comprises a storage frame 2 attached to a hole 1a formed in a slab 1 such as a floor or a veranda, and an upper portion and a storage frame 2 pivotally attached to the floor surface side and the ceiling surface side of the storage frame 2, respectively. The lower lids 3 and 4 and the upper and lower lids 3 and 4 are connected to each other, the lower lid 4 is opened and closed in conjunction with the opening and closing of the upper lid 3, and the upper lid 3 is fixed and maintained in a substantially upright state when opened. The link mechanism 5 constituting the opening / closing structure of the present invention, and a plurality of horizontal bars 6b, 6b ... Between the pair of telescopic members 6c, 6c pivotally attached to the vertical bars 6a, 6a. When the upper and lower lids 3 and 4 are opened and the upper and lower lids 3 and 4 are opened while being folded and stored in the storage frame 2, the ladder 6 that extends to the floor below or to the vicinity thereof and the upper and lower lids After 3 and 4 are opened, the descent of the ladder 6 starts, and the extension descent speed of the ladder 6 Controlled, and is composed of a loose disembarkation 7 for pulling accommodating the ladder 6.

In this case, the housing frame 2 has an upper flange 2a facing outward and an outer L-shaped lower flange 2b bent at the lower end to form four side wall members 2c in a rectangular shape. The frame is structured so that an upper frame member 2d having a substantially crank-shaped cross section is mounted above the upper flange 2a.

A pair of left and right link mechanisms 5 are provided, and each link mechanism 5 has a side wall member 2 facing the storage frame 2.
A bell crank 10 pivotally attached to the inner surface of c so as to be rotatable in a vertical direction with a pivot shaft 9, and a bell crank 10 is rotatable with respect to an upper end side of an upper side first arm portion 10a and an upper lid 3, respectively. The upper link 11 pivotally attached to the lower crank 12 and the lower link 12 pivotally attached to the second arm 10b on the lower side of the bell crank 10 and the lower lid 4 respectively. It is formed so as to be slidable along the longitudinal direction of the lower link 12 at the pivotal connection portion between the lower lid 4 and the lower lid 4.

In this case, as shown in FIG. 4, the bell crank 10 is formed in a U-shaped cross section having bent pieces 10c, 10c on both side edges to maintain its strength, and
As shown in FIG. 5, a tubular pivot 13 is provided at the pivotal connection between the upper link 11 and the lower link 12. Further, a concave stopper step 14 is provided on the edge of the bell crank 10 on the side of the pivotal connection with the upper link 11 and the bent piece 10c.

As shown in FIG. 4, the upper link 11 is formed in a U-shaped cross section having bent pieces 11a, 11a on both side edges to maintain its strength.
The cylindrical pivot shaft 13 of the bell crank 10
A through hole 11b for inserting is inserted, and stopper pieces 15 that can engage with the stopper step portion 14 of the bell crank 10 are formed at both side edge portions on the tip side of the through hole 11b. A through hole 11c is formed in an end portion of the upper link 11 on the side of the upper cover 3 where the upper cover 3 is pivotally attached. The through hole 11c is provided in the upper bracket 16 fixed to the back surface of the upper cover 3. The burring portion 16a is fitted and washer 17,
The upper pivot bolt 18 and the nut 19 penetrating through the burring portion 16a via the joint form a pivotally attached portion (FIG. 6).
reference).

As shown in FIG. 4, the lower link 12 has a bell crank 10 at the end portion on the side of the pivotal connection with the bell crank 10.
A through hole 12a into which the cylindrical pivot shaft 13 is inserted is formed, and a long hole 12b along the longitudinal direction of the lower link 12 is formed at an end of the lower link 4 on the side where the lower link 4 is pivoted. In this case, long hole 1
A burring portion 20a provided on a lower bracket 20 fixed to the back surface side of the lower lid 4 is fitted and inserted into 2b,
A lower pivot bolt 22 and a nut 23 that penetrate through the burring portion 20a via washers 21 and 21 form a pivotally attached portion (see FIG. 7).

Bell crank 10 formed as described above
The upper and lower links 11, 12 are pivotally connected to each other by connecting the cylindrical pivot 13 of the bell crank 10 to the through hole 11 of the upper link 11, as shown in FIG.
After being inserted into b, the tubular pivot 1 protruding from the through hole 11b
It is formed by crimping the end of 3 to the outside by crimping 13a. Therefore, it is not necessary to use a pivotal member such as a bolt or a nut, the bell crank 10 and the upper link 11 can be easily rotatably connected, and rattling between the bell crank 10 and the upper link 11 can be prevented. Can be prevented. At the pivotally connecting portion between the bell crank 10 and the lower link 12, since the lower link 12 is not pressed by the bell crank 10 due to the height of the burring portion 20a, smooth rotation and sliding are obtained. Further, as the bolts and nuts, commercially available general ones can be used without using specially shaped bolts such as stepped bolts having a burring function. Further, since the surface pressure receiving area can be increased by increasing the hole diameter of the tubular pivot 13, the bell crank 10 and the upper link 11 are deformed by the horizontal load applied to the upper lid 3 in the closing direction. There is no.

In the above embodiment, the bell crank 10 is provided with the cylindrical pivot 13, and the upper and lower links 11 and 12 are provided with the through holes 11b and 12a.
It may be provided in reverse. That is, the bell crank 10 may be provided with a through hole, the upper and lower links 11, 12 may be provided with tubular pivots, and they may be connected by caulking as described above.

In order to assemble the link mechanism 5 constructed as described above to the evacuation system, first, the bell crank 10 and the upper and lower links 11 and 12 are connected to the tubular pivot 1 as described above.
3 is inserted into the through holes 11b and 12a to form the through holes 11b and 1
The protrusion from 2a is caulked to the outside to integrally form the bell crank 10 and the upper and lower links 11 and 12. Next, the upper link 11 may be pivotally attached to the upper bracket 16 of the upper lid 3, and the lower link 12 may be pivotally attached to the lower bracket of the lower lid 4 so as to be slidable and rotatable.

In the lid opening / closing structure of the present invention configured as described above, when the upper lid 3 or the lower lid 4 is closed, the bell crank 10 becomes the first and second arm portions 10a,
The upper link 11 and the lower link 12 are housed in the storage frame 2 in a state in which 10b is located above the pivot shaft 9 (see FIG. 8A). From this state, when the upper lid 3 is opened and moved around the upper support shaft 3a as a fulcrum, the bell crank 10 rotates counterclockwise as shown in FIG. 8B, and the first arm portion 10a moves upward. The second arm portion 10b is moved downward to the side. Then, when the upper lid 3 rotates at a right angle, the stopper piece 15 of the upper link 11 abuts and engages with the stopper step portion 14 of the bell crank 10 to prevent the upper lid 3 from being opened and move upward. Movement of the lid 3 in the closing direction is prevented (see FIG. 8C and FIG. 2).

Further, in the opened state, the lower link 12 and the lower bracket 20 can slide even if the lower lid 4 is fanned by wind pressure or the like to receive a horizontal load and rotate about the lower support shaft 4a as a fulcrum. Since the bell crank 10 and the lower link 12 are pivotally connected to each other, the rotation of the lower lid 4 can be absorbed by the pivotal connection portion of the bell crank 10 and the lower link 12, and the rotation of the lower lid 4 is transmitted to the upper lid 3 via the link mechanism 5. Never be done. Therefore, it is possible to prevent the risk that the upper lid 3 is inadvertently closed.

The uppermost vertical bars 6a, 6a of the ladder 6 are
Is attached to the inside of the storage frame 2 while being pivotally attached to the brackets 24, 24 in advance, as shown in FIG. At this time, a slow-moving machine 7 is fixedly installed between the brackets 24, 24 and is attached to the storage frame 2 at the same time as the ladder 6. Further, the lower end of the wire 25 that can be wound around a drum (not shown) built in the slow-moving machine 7 has a crank-like shape that is horizontally stretched between the vertical bars 6a, 6a on the lower end side of the ladder 6. The ladder 6 is connected to the horizontal rod 26 and can wind up the ladder 6.

[0031]

As described above, according to the lid opening / closing structure of the present invention, since it is configured as described above,
The following effects can be obtained.

1) According to the lid opening / closing structure described in claim 1, a bell crank pivotally attached to the storage frame, an upper link pivotally attached to an upper end of the bell crank and an upper lid, and a bell crank. Of the lower link and the lower lid, the lower link is pivotally attached to the lower lid, and the pivotal portion of the lower link and the lower lid is formed so as to be slidable along the longitudinal direction of the lower link. Even when the lid rotates by receiving wind pressure, it is absorbed by the pivotally connecting portion between the bell crank and the lower link, the closing movement of the upper lid can be prevented, and the safety can be improved.

2) According to the lid opening / closing structure described in claim 2, a tubular pivot is formed on one of the bell crank or the upper and lower links, and the tubular pivot is provided on the other of the pivotally attached portions. Since the pivotally-attached portion is formed by fitting it into the through-hole and bending the protruding portion from the through-hole outward, it is possible to reduce the number of components of the pivotally-attached portion and to reduce the mounting work. It is possible to reduce the amount of vibration, and it is possible to prevent rattling between the bell crank and the link due to the horizontal load acting on the upper lid.

3) According to the lid opening / closing structure of the third aspect, at the end of the upper link that is pivotally connected to the bell crank, the bell is closed to prevent the upper lid from closing when the upper lid is opened. Since the stopper piece that engages with the crank is formed, it is possible to reliably prevent the closing movement of the upper lid when opening, and since there is no need to provide a separate stopper mechanism, the structure is simple and the inside of the storage frame The space can be effectively used.

[Brief description of drawings]

FIG. 1 is a perspective view of a state of use of an evacuation device having a lid opening / closing structure of the present invention.

FIG. 2 is an enlarged side view showing a main part of a lid opening / closing structure.

FIG. 3 is a cross-sectional view showing a closed state of the lid.

FIG. 4 is an exploded perspective view showing a bell crank, an upper link and a lower link according to the present invention.

FIG. 5 is a sectional view of a pivotally connecting portion between a bell crank and an upper link according to the present invention.

FIG. 6 is a cross-sectional view showing a pivotally connecting portion between an upper link and an upper lid in the present invention.

FIG. 7 is a cross-sectional view showing a pivotally connecting portion between a lower link and a lower lid according to the present invention.

FIG. 8 is an explanatory view showing the opened / closed state of the upper lid and the lower lid in the present invention.

[Explanation of symbols]

 2 Storage Frame 3 Lower Lid 4 Lower Lid 5 Link Mechanism 6 Ladder 9 Pivot Shaft 10 Bell Crank 11 Upper Link 11b Through Hole 12 Lower Link 12a Through Hole 12b Oblong Hole 13 Cylindrical Pivot 13a Bending Part 14 Stopper Step 15 Stopper piece

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshifumi Okado 1-1-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Naka Technical Research Institute Co., Ltd. (72) Inventor Hiroko Kobayashi 1-1-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Incorporated company Naka Technical Research Institute

Claims (3)

[Claims] 1. A storage frame attached to a hole formed in a slab such as a floor or a veranda, upper and lower lids pivotally attached to a floor surface side and a ceiling surface side of the storage frame, and the storage. An evacuation device comprising a ladder that is folded and stored in a frame and that extends to a floor below or to the vicinity thereof when the upper and lower lids are opened, and a bell crank pivotally attached to the storage frame. And an upper link pivotally attached to the upper end of the bell crank and the upper lid, and a lower link pivotally attached to the lower end of the bell crank and the lower lid. An opening / closing structure for a lid in an evacuation device, characterized in that a pivotally connected portion with the lid is formed so as to be slidable along the longitudinal direction of the lower link. 2. A tubular pivot is formed at one of the bell crank or the upper and lower links that abut each other at the pivotal attachment portion between the bell crank and the upper and lower links, and the tubular pivot is pivotally attached to the tubular pivot. The opening / closing structure of the lid of the evacuation device according to claim 1, wherein the opening / closing structure of the lid is fitted in a through hole provided on the other side of the portion, and the protruding portion from the through hole is bent outward. .. 3. A stopper piece that engages with the bell crank to prevent the closing movement of the upper lid when the upper lid is opened is formed at the end of the upper link that is pivotally connected to the bell crank. The opening / closing structure of the lid in the evacuation device according to claim 1, wherein.