JP3091894B2 - Ladder support structure for evacuation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder support structure for an evacuation device, and more particularly to a storage frame attached to a hole formed in a slab such as a floor or a veranda, and a storage frame inside the storage frame. The present invention relates to a support structure for a ladder in an evacuation device having a pantograph ladder that is folded and stored.

[0002]

2. Description of the Related Art In general, evacuation devices of this type include floors,
A storage frame attached to a hole formed in a slab such as a veranda, upper and lower lids pivotally attached to the floor side and the ceiling side of the storage frame, respectively, and are folded in the storage frame. When it is stored and the upper and lower lids are opened,
It is known to have a pantograph ladder that extends to or near the floor below the floor.

[0003] In the evacuation device configured as described above, the ladder has a structure in which a pair of right and left telescopic bodies having a number of vertical rails pivotally connected in a pantograph manner are connected by a horizontal rail for stepping. The top of the ladder is rotatably supported by a fixture fixed within the storage frame. When the ladder thus configured descends in the extended state, it is preferable that the rotation be restricted and the lower end be extended in an inclined state away from the wall surface in terms of safe evacuation. Therefore, conventionally, in order to support the elongated ladder in an inclined manner, the supporting member protruding from the uppermost vertical rail is brought into contact with the inner wall surface of the storage frame, and the ladder is separated from the wall surface (shown in the actual case). 5
No. 7-120699).

[0004]

However, in the conventional ladder support structure of this type, the support members are separately prepared and fixed to the vertical rails by welding or the like. The attaching operation is complicated, and there is a possibility that rust may be generated at the welded portion by welding or the like. Also,
When the support member is protruded from the vertical rail, when the ladder is folded and stored, the support member may come into contact with another vertical rail or a mounting tool, and the mounting position of the support member is limited. was there. Furthermore, since the end of the support member is in contact with the wall surface, the force applied to the vertical rail is locally supported, a large load is applied to the vertical rail, and the ladder is in an inclined state during evacuation. There was a problem that maintenance became difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a ladder support structure for an evacuation device in which the number of constituent members and the number of assembling steps are reduced, and the support of the ladder is stabilized. Is what you do.

[0006]

In order to achieve the above object, a ladder support structure for an evacuation device according to the present invention includes a storage frame attached to a hole formed in a slab such as a floor or a veranda, and a storage frame attached to the storage frame. Upper and lower lids pivotally attached to the floor side and the ceiling side of the frame, respectively, and when the upper and lower lids are folded and stored in the storage frame and the upper and lower lids are opened, the lower floor or the floor thereof An evacuation device comprising a pantograph-type ladder extending to the vicinity, wherein a mounting part fixed to an inner surface of the storage frame is provided with a mounting portion for rotatably pivotally supporting the uppermost vertical rail of the ladder. At the same time, an inclined support piece for projecting and supporting the uppermost vertical rail of the ladder when the ladder is extended is provided on the attachment portion.

In the present invention, it is preferable that a reinforcing portion is formed on the attachment to prevent deformation due to a load when the ladder is used. In this case, it is conceivable that the reinforcing portion is provided separately from the fixture, but it is preferable to form the reinforcing portion by plastic working.

In the present invention, if the inclined support piece supports the uppermost vertical rail of the ladder when the ladder extends, the mounting part and the separate member are fixed by bolts or the like. However, it is preferable to be integrated with a mounting portion cut and raised along a cut provided in the mounting portion. Further, it is preferable that the area of the inclined support piece that comes into contact with the vertical rail of the ladder is larger, and it is more preferable to provide bending portions for reinforcement at both ends of the inclined support piece so as to impart strength to the inclined support piece.

[0009]

According to the ladder support structure of the evacuation device of the present invention configured as described above, the uppermost vertical rail of the ladder is rotatably pivoted to the fixture fixed to the inner surface of the storage frame. Along with forming the mounting portion, the mounting portion is provided with a sloping support piece projecting and supporting the vertical rail at the top of the ladder when the ladder extends, so that a member for ladder tilt support is separately provided. The ladder can be supported in an inclined manner without providing the ladder.
In addition, the number of components can be reduced, and the number of assembling steps can be reduced. Further, by contacting and supporting the vertical rail on the inclined support piece, the contact area can be increased, and the load on the vertical rail can be reduced by dispersing the force applied to the vertical rail.

[0010] Further, by forming a reinforcing portion on the attachment to prevent deformation due to a load when the ladder is used, the durability of the evacuation device can be improved. If the reinforcing portion is formed by plastic working, it is not necessary to separately attach a reinforcing member, so that the number of parts can be reduced and the cost can be reduced.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. First Embodiment FIG. 1 is a perspective view of an evacuation device having a ladder support structure of the present invention in use, FIG. 2 is an enlarged perspective view of the ladder support structure in the first embodiment, and FIG. FIG. 4 is a cross-sectional view of the evacuation device in use, and FIG. 4 is a cross-sectional view of the ladder in the first embodiment in a stored state.

The evacuation device includes a storage frame 2 attached to a hole 1a formed in a slab 1 such as a floor or a veranda, and upper and lower pivots attached to the floor side and the ceiling side of the storage frame 2, respectively. The lower lids 3, 4 and the upper and lower lids 3, 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 substantially upright when opened. , And a plurality of stepping horizontal rails 6b, 6b,... Are suspended at appropriate intervals between a pair of telescopic members 6c, 6c in which a plurality of vertical rails 6a, 6a. When the upper and lower lids are folded and stored in the storage frame 2 and the upper and lower lids are opened, the ladder 6 extending to or near the lower floor and the upper and lower lids 3, 4 are opened. ,
The main part is constituted by a descent mechanism 7 for starting the descent of the ladder 6, controlling the extension / descent speed of the ladder 6, and pulling up and storing the ladder 6.

In this case, the storage frame 2 has four side wall members 2c having an outwardly directed upper flange 2a at the upper end and bent outwardly shaped L-shaped lower flanges 2b at the lower end. The upper frame member 2d has a frame-like shape and has a substantially crank-shaped cross section mounted above the upper flange 2a. Note that a mounting hole 2e for a fixing bolt 10 described later is formed in the side wall member 2c on the ladder mounting side.

A mounting member 9 is fixed to the inner surface of the side wall member 2c of the storage frame 2 configured as described above.
The upper end of the vertical rail 6a at the top of the ladder 6 is rotatably supported by the bracket 91.

In this case, as shown in FIG. 6, the attachment 9 has a fixing portion 9a fixed to the inner surface of the side wall member 2c of the storage frame 2, and a right angle bent from one end of the fixing portion 9a. The ladder 6 includes a pair of angled brackets 91, 91 each having a mounting portion 9b, and a horizontal plate 92 for mounting the lowering mechanism 7, which is connected between the brackets 91, 91.
In this case, a vertically long hole 9c through which the fixing bolt 10 penetrates is formed in the upper portion of the fixing portion 9a of the bracket 91, and a cutout groove 9d through which the fixing bolt 10 penetrates is formed in the lower end. On the other hand, the mounting portion 9b has an oval mounting hole 9e for pivotally supporting the end of the uppermost vertical bar 6a of the ladder 6.
The lower part of the mounting hole 9e is cut and raised with an inclined support piece 9f for abutting and supporting the uppermost vertical bar 6a, and the lower part of the ladder 6 is extended in an inclined state. 9g for mounting the guide member 12 for pivoting is provided. In this case, at both ends of the inclined support piece 9f,
The bending portions 9h, 9h for reinforcement are bent downward to maintain the strength of the inclined support pieces 9f. Also,
A wing piece 9i is bent inward at the tip of the attachment portion 9b, and the guide member 12 can come into contact with the wing piece 9i.

In order to pivotally support the vertical rail of the ladder 6 to the mounting fixture 9 constructed as described above, as shown in FIGS. 7 and 8, an oval step 13c is provided on the screw shaft 13b side of the head 13a. The pivot bolt 13 is inserted through the mounting hole 9e from the opposing inner surface of the bracket 91 via the first washer 14 having the oval through-hole 14a, and is inserted into the through-hole 6d provided in the vertical bar 6a. Through the bearing 23 to be inserted into the nut 1 for pivotal support via the second washer 15 at the projecting portion thereof.
By fastening the ladder 6, the ladder 6 can be pivotally supported on the bracket 91 in a state where the pivot bolt 13 is fixed. In this case, the mounting hole 9e of the bracket 91 and the step 13c of the pivot bolt 13 do not necessarily have to be oval, but may be, for example, a polygonal shape such as a square or a hexagon or a shape eccentric to the screw shaft 13b. Any shape may be used as long as the rotation of the support bolt 13 is prevented.

As shown in FIG. 6, a cover member 17 for covering the contact support between the vertical bar 6a and the inclined support piece 9f is attached to the projecting side of the pivot bolt 13 in a state where it is loosely fitted. Accordingly, it is possible to prevent the hand from being erroneously pinched between the vertical bar 6a and the inclined support piece 9f by the cover member 17.

In order to fix the mounting member 9 configured as described above to the side wall member 2c of the storage frame 2, the fixing plate 9 is fixed to the outer surface of the side wall member 2c in a state where the reinforcing plate 8 is in contact with the outer side surface. As shown in FIG. 5, the reinforcing plate 8 is fixed to the outer surface of the side wall member 2c of the storage frame 2 by fixing means such as spot welding or the like. Anchor piece 8b cut and raised at right angles toward the slab side, three through holes 8c for mounting fixing bolts 10 drilled in fixed substrate 8a, and engage with the lower surface of upper flange 2a of storage frame 2. A reinforcement bent piece 8d which is bent at right angles outward from the upper end of the fixed substrate 8a, and a fixing bolt 10 fixed by welding or the like penetrating the through hole 8c. The fixing bolt 10 can pass through the inside of the mounting hole 2 e formed in the side wall member 2 c of the storage frame 2 and protrude inward of the storage frame 2. Then, the fixing nut 11 is fastened to the fixing bolt 10 protruding into the storage frame 2 so that the bracket 91 of the fixture 9 is
Is fixed. In this case, the upper two through holes 8c of the three through holes 8c are selectively used according to the mounting side of the bracket 91.

When the fixture 9 constructed as described above is fixed, the ladder 6 folded in advance is attached to the fixture 9 so that the attachment of the ladder 6 can be performed simultaneously with the fixing work of the fixture 9. It can be carried out. In the evacuation device installed in this manner, the ladder 6 is in the folded state, as shown in FIG. Is extended and lowered,
As shown in FIG. 3, the uppermost vertical bar 6a of the ladder 6 is abutted and supported by the inclined support piece 9f, and the ladder 6 is maintained in an inclined state away from the wall and is evacuated. The ladder 6 itself engages with a stopper piece 6d protruding outward of the lower end of the upper vertical bar 6a of the adjacent vertical bars 6a, 6a, and the lower surface of the upper end of the lower vertical bar 6a. The ladder 6
The extension of the ladder 6 is regulated and the extension state of the ladder 6 is maintained (see FIGS. 2 and 3).

An L-shaped anchor member 18 is fixed to the outer surface of the other three side wall members 2c of the storage frame 2 by spot welding or the like (see FIG. 1). A handle 19 is fixedly provided on the inner surface of the upper cover 3, and a plastic lower cover buffer is provided on the lower edge of the lower cover 4 to prevent damage due to abrasion when the ladder 6 is moved up and down. A member 20 is attached. The lowering mechanism 7 and the lower vertical rail 6b
A winding wire 22 is interposed between the horizontal rod 21 and the horizontal rod 21 interposed therebetween.
Is connected.

Second Embodiment FIG. 9 is a perspective view showing a main part of a second embodiment of the mounting tool, and FIG. 10 is an exploded perspective view showing a mounting state of the mounting tool and the ladder in the second embodiment. . In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 9, a flange portion 9j, which is a reinforcing portion, is formed on the fixing portion 9a of the bracket 91 of the fixture 9 by raising an intermediate portion of the upper edge portion toward the near side by plastic deformation. In addition, a rib portion 9k as a reinforcing portion is formed horizontally in the mounting portion 9b by similarly bending a portion from a lower end portion of the mounting portion to a portion below the inclined support piece 9f inwardly by plastic deformation. Have been. In addition, the mounting portion 9b is provided with a mounting screw hole 9m for mounting a ladder overturn prevention stopper 26, which will be described later, near the lower side of the mounting hole 9e. In FIG. 9, only one bracket 91 of the fixture 9 is shown, but the other bracket 91 formed symmetrically with this also has the flange portion 9j, the rib portion 9k, and the mounting screw hole. 9m are formed in exactly the same arrangement. The state of attachment and arrangement of the fixture 9 having the bracket 91 to the storage frame 2 is the same as in FIGS.

The mounting relationship between the mounting device 9 and the ladder 6 thus configured is substantially the same as that of the first embodiment. In this case, as shown in FIG. 10, the first washer 14 (FIG. ), A special round washer 24 having U-shaped cutouts 24a formed at four locations on its outer peripheral portion is used. Further, a third washer 25 is interposed between the vertical bar 6a and the mounting portion 9b. By providing the third washer 25, it is possible to prevent the mounting portion 9b from being depressed by the surface pressure from the bearing 23 when the pivot bolt 13 is tightened by the nut 16.

In this case, the mounting screw hole 9m is provided with a hexagon socket head cap screw 2 as a stopper for preventing the ladder from falling down.
6 is inserted from the outside of the bracket 91 and fastened and fixed with a tool such as a wrench. The hexagon socket head bolt 26 abuts on the uppermost vertical bar 6 a of the ladder 6 and prevents only rotation to the opposite side (arrow A side). The U-shaped notch 24a of the special round washer 24 is formed to avoid contact with the hexagon socket head bolt 26 (see FIG. 11). Since this special round washer 24 has four U-shaped notches 24a at symmetrical positions, it can be used without worrying about right and left front and back.

According to the ladder support structure of the second embodiment configured as described above, the flange portion 9j is formed on the fixing portion 9a and the rib portion 9k is formed on the mounting portion 9b. The section modulus of the mounting portion 9b is significantly increased. Thereby, the deformation of the fixing portion 9a in the turning direction due to the load of the ladder 6, ie, in this case,
A corner with the fixing nut 11 as a fulcrum and the mounting portion 9b
It is possible to prevent the fixing portion 9a from being deformed by a force that attempts to pull the fixing portion 9a toward the ladder 6 with the upper end of the portion as a point of force. In addition, the mounting portion 9b is prevented from being deformed by a load acting via the inclined support piece 9f when the ladder is used. By reinforcing the attachment 9 of the ladder 6 in this way,
The durability of the evacuation device can be significantly improved.

Also, a stopper (hexagon socket head cap screw 26) for preventing the ladder from tipping over is attached to the fixture 9 so that the ladder can be mounted as shown in FIG.
As shown in FIG. 1, it is possible to prevent the ladder 6 placed on the floor or the like from falling down to the arrow A side in a state in which the ladder 6 is folded with the attachment 9 down. Thereby, the handling and handling of the ladder 6 when attaching the evacuation device is remarkably improved.

[0027]

As described above, according to the ladder support structure of the evacuation device of the present invention, the following effects can be obtained because it is configured as described above.

1) Since an inclined support piece is provided on the ladder fixture for supporting and supporting the uppermost vertical rail of the ladder when the ladder extends, the number of components can be reduced, and the number of assembly steps can be reduced. The ladder can be safely stored and extended since there is no risk of contact with other constituent members unlike the conventional support member.

2) By providing the inclined support pieces, the contact support surface of the ladder with the vertical rail can be enlarged, and the force applied to the ladder is dispersed and supported, so that the strength can be improved and the safety can be improved. Performance can be improved.

3) The durability of the evacuation device can be improved by forming a reinforcing portion on the attachment of the ladder to prevent deformation due to a load when the ladder is used.

4) Since the reinforcing portion of the fixture is formed by plastic working, there is no need to separately attach a reinforcing member, so that the number of parts can be reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an evacuation device having a ladder support structure of the present invention.

FIG. 2 is an enlarged perspective view of a ladder support structure according to the first embodiment of the present invention.

FIG. 3 is a sectional view showing a use state of the evacuation device according to the first embodiment of the present invention.

FIG. 4 is a sectional view showing a stored state of the ladder in the first embodiment of the present invention.

FIG. 5 is an exploded perspective view showing a fixing state of the attachment to the storage frame in the first embodiment of the present invention.

FIG. 6 is a perspective view showing an arrangement state of the fixture in the first embodiment of the present invention.

FIG. 7 is an exploded perspective view showing an attachment state of the attachment and the ladder in the first embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a mounting state of the mounting tool and the ladder according to the first embodiment of the present invention.

FIG. 9 is a perspective view showing a fixture according to a second embodiment of the present invention.

FIG. 10 is an exploded perspective view showing a mounting state of a mounting tool and a ladder according to a second embodiment of the present invention.

FIG. 11 is a side view showing a use state of a stopper for preventing a ladder from tipping over.

[Explanation of symbols]

 2 Storage Frame 6 Ladder 6a Vertical Bar 9 Mounting Tool 91 Bracket 9a Fixed Portion 9b Mounting Portion 9e Mounting Hole 9f Inclined Supporting Piece 9j Flange Portion (Reinforcement Portion) 9k Rib Portion (Reinforcement Portion) 9m Screw Hole for Stopper Mounting 10 Fixing Bolt 11 Fixing Nut 13 Pivot Bolt 16 Pivot Nut 26 Hex Socket Head Cap Screw (Stopper)

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A62B 5/00 E06C 7/48 E06C 9/14

Claims (3)

(57) [Claims] 1. A storage frame attached to a hole formed in a slab such as a floor or a veranda, an upper and lower lid pivotally connected to a floor side and a ceiling side of the storage frame, respectively, An evacuation device that is folded and stored in a frame and has a pantograph-type ladder that extends to or near the floor below when the upper and lower lids are opened. A mounting portion for rotatably supporting the uppermost vertical rail of the ladder is formed on the fixture to be fixed, and the uppermost vertical rail of the ladder is extended to the mounting portion when the ladder extends. A ladder support structure for an evacuation device, wherein a sloping support piece for abutting and supporting is protruded. 2. The ladder support structure for an evacuation device according to claim 1, wherein a reinforcing portion is formed on the attachment to prevent deformation due to a load when the ladder is used. 3. A ladder support structure for an evacuation device according to claim 2, wherein said reinforcing portion is formed by plastic working.