JP3529000B2 - Folding ladder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding ladder which can be used when climbing a roof from a building balcony or the like. [0002] On a flat roof of a building such as a detached house,
A drain port for guiding rainwater and the like to the rain gutter is provided. It is indispensable to periodically clean such a drain port so that dust and dust scattered in the air do not clog due to accumulation or the like. For this reason, it is well known that a ladder girder extending on a flat roof is fixed to an upper outer wall of a balcony or the like installed on the second floor or more of a building so that it is easy to go up and down the roof when cleaning the drain outlet. . [0003] However, since the ladder is always exposed to the outdoors, there is a problem that the appearance of the building is deteriorated. In addition, the ladder must be arranged at a certain distance from the outer wall to secure a space for inserting limbs between the outer wall and the step rail, and the area that can be used effectively, such as balcony, will be reduced accordingly. There's a problem. [0004] It is an object of the present invention to provide a folding ladder which is compactly folded and inconspicuous. A folding ladder according to the present invention has a fixed rail extending vertically and fixed to an outer wall, and a wall-side ladder girder is attached to the fixed rail so as to be movable up and down. A plurality of steps / rods are rotatably connected to the spar so that the tips take a horizontal position in which the tips extend to the outside or an inclined position in which the tips recede toward the outer wall. Is rotatably connected to an outer ladder girder arranged in parallel with the fixed rail, and an elevating rail is attached to the outer ladder girder so as to be vertically movable, thereby fixing the fixed rail and the wall-side ladder girder.
A first fastener, the fixed rail and the lifting
A second fastener for fixing the outer ladder to the outer ladder;
A third fixing tool for fixing the child girder and the lifting rail
Are provided, and the step and row rails take a horizontal position and
When the lift rail is lowered, the lift rail
Reinforcing bar connecting the lower end of the rail to the lower end of the fixed rail
Between the fixed rail and the lift rail.
It is provided . [0006] A folding ladder according to an embodiment of the present invention will be described below. As shown in FIGS. 1 to 4, the folding ladder 1 according to the present embodiment fixes a fixed rail 4 extending vertically to an outer wall 3 above a balcony 2 installed on a second floor or more of a house or the like. , The fixed rail 4
A ladder girder 5 on the wall side is mounted on the wall so that it can move up and down, and the tips 6a of the plurality of steps and the connecting rod 6 are positioned so as to approach the outer wall 3 or project to the outside. A base end 6b of the rail 6 is rotatably connected to the wall-side ladder girder 5 at a predetermined interval in the vertical direction.
Is rotatably connected to an outer ladder girder 7 arranged in parallel with the fixed rail 4, and a lifting rail 8 is attached to the outer ladder girder 7 so as to be vertically movable. [0007] As shown in FIG.
An aluminum grooved sash bar having flanges 4a on both sides and a web 4b connecting the flanges 4a on both sides. The aluminum sash bar has a posture in which the flanges 4a on both sides are directed to the outdoor side, and the web 4b is attached to the outer wall 3. The web 4b is fastened to the embedded lightweight lip channel steel 9 via bolts 12, washers 13 and nuts 14. A pair of opposing ridges 10 are provided at the tip edges of the flanges 4a on both sides.
And a pair of ridges 11 facing each other at a predetermined interval behind the pair of ridges 10. The wall-side ladder girder 5 has flanges 5a on both sides.
And a web 5b for connecting these flanges 5a on both sides, and a pair of ridges 10 inside the fixed rail 4 with the flanges 5a on both sides facing the outside and standing upright. It is inserted between the ridges 11 so as to be vertically movable. The outer ladder girder 7 has flanges 7a on both sides.
And a grooved sash bar made of aluminum having a web 7b connecting these flanges 7a on both sides thereof. The flanges 7a on both sides are directed toward the outer wall 3 and the wall is erected through a plurality of steps and a connecting rod 6 in an upright posture. It is supported by the side ladder girder 5. The lifting rail 8 is an aluminum grooved sash bar having flanges 8a on both sides and a web 8b connecting the flanges 8a on both sides.
The outer ladder girder 7 is inserted between the web 8b and a pair of opposing ridges 15 formed at the tips of the flanges 8a on both sides, while taking the attitude of the web ladder a toward the outer wall 3 side. [0010] In the step / rail rod 6, a base end 6 b is connected to the wall side ladder girder 5 via a wall side hinge member 17,
a is a hollow sash bar made of aluminum and connected to the outer ladder girder 7 via the outer hinge member 18. When the outer ladder girder 7 is separated from the wall-side ladder girder 5, as shown in FIGS. When the outer ladder girder 7 is brought closer to the wall-side ladder girder 5 in a horizontal posture between the ladder girder 5 and the outer ladder girder 7, the wall-side ladder girder 5 and the outer ladder girder 5 are brought close to each other as shown by the imaginary line in FIG. When the outer ladder girder 7 is inclined with respect to the outer ladder girder 7 and the outer ladder girder 7 is brought closer to the wall-side ladder girder 5 to overlap them, as shown in FIGS. 5 and 8, the wall-side ladder girder 5 and the outer ladder It is stored inside the girder 7. The wall-side hinge member 17 is shown in FIGS.
As shown in the figure, a fixing bracket 19 for fixing to the wall side ladder girder 5
And a turning bracket 21 made of a lightweight lip channel steel that fits inside the base end 6b of the step and link rod 6 via a hinge pin 20. More specifically, the fixing bracket 19 has a pin insertion hole 22 formed on the upper part of the flange 19a on both sides, and a front end edge of the flange 19a on both sides formed of a plate material for horizontally supporting the step and link rod 6. The web 19b is fastened to the inner surface of the web 5b of the wall-side ladder girder 5 with bolts 24 and nuts 25 shown in FIG. On the other hand, pin insertion holes 26 and 27 are formed near the base end 6b of the revolving metal fitting 21 and the step / link rail 6, respectively. And
The base end 6b of the stepping and connecting rod 6, the fixing bracket 19, and the turning bracket 2
1 are connected to each other by inserting the pins 20 into the respective pin insertion holes 22, 26, 27. The outer hinge member 18 is shown in FIGS.
As shown in FIG. 7, a turning metal fitting 21 that fits inside the tip 6a of the step and link rod 6 via a hinge pin 20 is attached to a fixing metal 19 fixed to the web 7b of the outer ladder girder 7 with a bolt 24 and a nut 25. The wall-side hinge member 1
Since the same member as that of FIG. 7 is used upside down, detailed description is omitted. Hereinafter, a procedure for using the folding ladder 1 according to the embodiment of the present invention will be described. FIG. 1 shows a state in which the folding ladder 1 is folded, in which a fixed rail 4 and a wall-side ladder girder 5 have a first fixing member a made of a pin or a bolt.
The fixed rail 4 and the elevating rail 8 are fixed by a second fixing member b such that a hook or the like attached to one of them is hooked to the other, and the outer ladder girder 7 and the elevating rail 8 are pinned. Or, it is fixed by a third fixing tool c such as a bolt. In order to use the folding ladder 1, first, the first fastener a is released and the second fastener b is released.
And lift the wall side ladder girder 5, the outer ladder girder 7 and the elevating rail 8 to a height position such that their upper ends project upward from the flat roof 28 as shown in FIG.
At this height position, the wall-side ladder girder 5 is
Is fixed to the fixed rail 4 again. And the outer ladder girder 7
Is pulled in the direction away from the outer wall 3 to bring it into the state shown by the solid line in FIG. In this state, the upper end of the step / rail rod 6, the wall-side ladder girder 5 and the outer ladder girder 7 located at the uppermost position has a height that can be used as a handrail when a person climbs or descends on the flat roof 28. Located in. As well shown in FIG. 8, the step / link rail 6 is horizontally supported by the stoppers 23 of the wall side hinge member 17 and the outer hinge member 18, so that a person rides on the elevating rail 8. Even if a load is applied in the same manner, the step / rail rod 6 does not fall down to the tip 6a side. Further, the third fixing member c is released, and the lifting rail 8 is lowered by its own weight along the outer ladder girder 7, and the lower end of the lifting rail 8 is connected to the floor 2a of the balcony 2 as shown in FIG.
When reaching the vicinity, the lifting rail 8 is fixed to the outer ladder girder 7 again using the third fixing tool c. On the other hand, in order to fold the folding ladder 1 from the state shown in FIG. 4, first, the third fixing member c is released, and as shown in FIG. After lifting to the position, the lifting rail 8 is fixed to the outer ladder girder 7 again using the third fixing tool c. Then, the outer ladder girder 7 is slightly pushed up and moved in a direction approaching the outer wall 3 to return to the state of FIG . Further, the first fastener a is released, and as shown in FIG. 1, the wall-side ladder girder 5, the outer ladder girder 7 and the elevating rail 8 are lowered by their own weights. When the height positions of the ladder girder 7 and the elevating rail 8 are aligned with the outer ladder girder 7, the wall-side ladder girder 5 is fixed to the fixed rail 4 again using the first fixing tool a , and the second fixing is performed. Using tool b
The lifting rail 8 is fixed to the fixed rail 4 by using. The first to third fixing members a to c may be clamps or latch mechanisms, and are not particularly limited as long as they can be easily attached and detached. In addition, fixed rail 4
May be directly fixed to the outer wall of an existing building using concrete bolts or the like. Furthermore, in order to reliably suppress the swing of the lower end of the lift rail 8, as shown in FIGS. 4 and 9, a reinforcing bar 29 is provided between the lower end of the fixed rail 4 and the lower end of the lift rail 8. You may insert it. As the reinforcing bars 29, pin insertion holes 29a corresponding to the pin insertion holes 30 formed in the fixed rail 4 and the elevating rail 8 are formed at both ends, and can be freely inserted into and removed from these pin insertion holes 29a, 30. One that is connected to the fixed rail 4 and the lift rail 8 via a hinge pin 31 with a head inserted therethrough may be used. The hinge pin 31 with the head
It is preferable that the split pin 32 be attached to the distal end side, since it does not drop out of the pin insertion holes 29a and 30 carelessly. As described above, the folding ladder of the present invention extends from the vicinity of the floor such as the balcony to the rooftop when used, and can be folded small when not in use. The folding ladder does not stand out and does not impair the appearance of the building. Also, when folded, the outer ladder girder approaches the wall side ladder girder and the whole becomes thin,
There is an advantage that Balconi can be used widely. In addition, when used, the outer ladder girder is separated from the fixed rail toward the outdoor side, so that a sufficient space for inserting limbs between the outer wall and the outer ladder girder can be secured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a state in which a folding ladder according to an embodiment of the present invention is folded and attached to an outer wall of a building. FIG. 2 is a side view showing a handling procedure of the folding ladder according to the embodiment of the present invention. FIG. 3 is a side view showing a handling procedure of the folding ladder according to the embodiment of the present invention. FIG. 4 is a side view showing a use state of the folding ladder according to the embodiment of the present invention. FIG. 5 is a sectional view taken along line AA of FIG. 1; FIG. 6 is an exploded perspective view of a main part of the folding ladder according to the embodiment of the present invention. FIG. 7 is a vertical sectional view of a portion B in FIG. 3; FIG. 8 is a sectional view taken along line CC of FIG. 5; FIG. 9 is a sectional view taken along the line DD in FIG. 4; [Description of Signs] 1 Folding ladder 2 Balconi 3 Outer wall 4 Fixed rail 5 Wall side ladder girder 6 Stepping and connecting rail 7 Elevating rail 8 Outer ladder girder a First fixing tool b Second fixing tool c Third fixing Fixture 29 reinforcement bar

Claims (1)

(57) [Claims 1] A fixed rail extending in a vertical direction is fixed to an outer wall, and a wall-side ladder girder is attached to the fixed rail so as to be movable up and down. A plurality of steps and a connecting rod are rotatably connected so as to take a horizontal position extending to the outdoor side or an inclined position in which the end is retracted to the outer wall side. rotatably connected to the outer ladder digits arranged in parallel to the fixed rail, mounted for vertically moving the lifting rail outer ladder spar, the wall ladder and the fixed rail
A first fixing tool for fixing a beam, and the fixing rail;
A second fixing tool capable of fixing the lifting rail, and
The second to make the outer ladder girder and the elevating rail fixable
3 fixtures are provided respectively, and the step and rail are in horizontal position
In the state where the lifting rail is lowered
Connect the lower end of the lifting rail to the lower end of the fixed rail
Between the fixed rail and the elevating rail
A folding ladder characterized by being provided detachably .