JPH0860965A - Folding ladder - Google Patents

Abstract

PURPOSE: To restrain deflection of a folding ladder by axially attaching cross rails to axially attaching portions in vertically intermittent positions between a pair of hanging bars which freely fold up, and by mounting approximately U-shaped locking bars between each axially attaching portion and the adjoining axially attaching portion. CONSTITUTION: In an emergency, a hook 25 is held against a verandah handrail or the like and hanging bars 11, 14 are extended downward to form a ladder. At a recess in a wall face, locking bars 20a, 20b, 20c..., which are mounted between an axially attaching portion to which a cross rail 19 is attached and another axially attaching portion to which the adjoining cross rail 19 is not attached, prevent the ladder from deflecting into the depth of the recess. The bars 20a, 20b, 20c... are folded in sequence as the ladder folds. A locking claw 26 pressed by a spring 26a blocks openings in the hook 25 to prevent the hook 25 from disconnecting. Therefore, the refugee can be prevented from taking an abnormal posture with his legs elongated in the depth of the recess in the wall face, and the hook can be prevented from disconnecting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates mainly to improvement of an emergency refractory ladder installed in a general house, and in particular, has improved safety and handleability so as to be suitable for use in a place where the side wall surface of a building has irregularities. It was made.

[0002]

2. Description of the Related Art Various emergency refractory ladders have been developed so far. Among them, as shown in FIG. 4, a plurality of longitudinally arranged horizontal rails 1a to 1k having spacers 5.5 attached to the back side,
The lateral bars 1a to 1b are respectively rotatably pivoted on both ends thereof by the pins 4, and the columns 2a and 2b are also pivotally pivoted on the intermediate portions by the pins 3.
It is known that the k is connected in series and the suspension chain 6.6 and the hook 7.7 are attached to the upper end of the k.

[0003]

However, in the above-mentioned conventional structure, when the side wall surface of the building has a recess as a result of lack of stability in the back surface direction,
When the evacuee is in an emergency descent, as shown in FIG. 5, only his / her feet are in an abnormal position toward the concave portion of the side wall surface of the building B, so that most of the weight is supported only by the hands. Therefore, it is not suitable for people with weak hands and arms, especially for women, and evacuation is often accompanied by great danger.

[0004]

Therefore, the present invention solves the above-mentioned various problems in the prior art and increases safety in the evacuation ladder, particularly in the front-rear depth direction (wall surface direction). Specifically, a plurality of connecting bars having a constant length are axially rotatably attached to each other by axially attaching portions so that they are sequentially connected in the vertical direction. The set of the hanging bars is made into a pair of two left and right via a fixed interval from each other, and horizontal bars are horizontally provided between the pair of hanging bars with respect to the shaft-attaching portions of the longitudinal intermittent portions. A foldable type in which a U-shaped fixed bar is attached between a shaft-attachment portion to which a horizontal rail is attached and an axle-attachment portion adjacent to the shaft-attachment portion. Regarding the ladder.

Further, according to the present invention, each connecting bar in a series of suspension bars, which are pivotally attached to each other by the shaft attaching portion and are successively connected in the longitudinal direction, are attached to the shaft attaching portion at the intermittent portion. The present invention also relates to a foldable ladder that is composed of two sheets each in the front-rear depth direction with a slight gap interposed between the end portions of the horizontal rails attached horizontally.

Further, the present invention also relates to a foldable ladder in which a hook for hanging is attached to the upper ends of a pair of left and right hanging bars which are foldable.

Further, according to the present invention, a hanging hook is attached to the upper ends of a pair of left and right hanging bars which are foldable, and the hanging hook has one of the hooks. It also relates to a foldable ladder that is attached to the opening edge and has a lock pawl attached thereto that is always urged by a spring to close the opening of the hook.

[0008]

[Operation] When a ladder is extended along the wall surface of a building during an emergency descent, and even when it approaches a recessed portion of the wall surface, the shaft mounting portion to which the cross rail is attached and the shaft mounting adjacent thereto are attached. The U-shaped fixed bar attached between the legs and the ladder prevents the ladder from bending in the depth direction, so that only the evacuees' legs are extended in the depth direction and become an abnormal position, barely supporting the weight with the hands. It is possible to eliminate the danger.

Further, the U-shaped fixing bar is not bulky because it is folded so as to be sequentially folded in a state in which the ladder is tilted from the vertical direction to the horizontal direction when the ladder is folded. The feeding work is smooth and the operation is reliable.

Two folds left and right 1 further foldable
The hook for hanging attached to the upper end of the pair of hanging bars has a lock claw that is axially attached to one opening edge and is always urged by a spring to close the opening of the hook. If the hook is attached to the handrail of the veranda in an emergency, the lock claw closes the opening of the hook so that the hook does not easily come off the handrail and the evacuation is performed. In this case, the safety can be sufficiently guaranteed.

[0011]

The specific contents of the present invention will be described below with reference to FIGS.
In the description of the third embodiment, 11 and 14 each represent a single hanging bar, 19 a horizontal rail, and 25 a hanging hook. The suspension bars 11 and 14 include a plurality of fixed length connecting bars 12a. 12b. 12c. 12d. ..., and 1
5a. 15b. 15c. 15d. ..., each end of which is attached to the shaft attachment portion 17a. 17b. 17c. 17d ...
And 18a. 18b. 18c. 18d. Thus, a series of hanging bars that are pivotally attached to each other and sequentially connected in the vertical direction is configured.

Further, the suspension bars 11 and 1 are connected in series.
4 are provided as a pair of two left and right pairs with a certain distance from each other, and between the pair of suspension bars 11.14, the shaft attachment portions 17a and 18a. 17c and 18c. 17e
And 18e. The horizontal crosspieces 19a. 19b. 19c. ... are rotatably attached to each other so that they can be folded in the height direction, and the horizontal rails 19a. 19b. 19c. The shaft mounting portion 17a. 17c. 17e. ..., 19a.
19c. 19e and the shaft attachment portions 17b. 17
d. 17f ..., 18b. 18d. 18f and a substantially U-shaped fixed bar 20a. 20b. 20c ... are attached respectively.

In this case, the above-mentioned series of suspension bars 11 and 14 are connected to each other by the connecting bars 12a. 12b. 12c, ...
.., 15a. 15b. 15c ... and the shaft attachment portions 17a. 17c. 17e ..., 18a. 18
c. 18e ... 18e. 19b. The connecting bar 16 has the same size as each connecting bar with a slight gap between the ends of 19c.
a. 16b. 16c are arranged so that two sheets are provided in the front-rear depth direction so that the stability of the ladder is further improved.

The hanging hook 25 is formed by combining two substantially L-shaped members to form an opening at the bottom as shown in FIG. 2, and further, the spacing between the openings can be freely adjusted. A plurality of bolt holes are formed at appropriate intervals in the overlapping portion, and any one of the bolt holes is used to bolt 25.
The hook main body 25a and the auxiliary hook 25b are configured by tightening and assembling by c, and the lower end of one hook main body 25a is coupled to the chain 24 and the other auxiliary hook 25a.
At the lower end of b, a lock claw 26 is rotatably provided by a pin 21 so that the tip of the spring 26a always biases the opening of the hook via a spring 26a.

In the figure, reference numeral 23 is the uppermost horizontal rail 19.
a so as to be horizontal along the length direction of a. It shows a substantially U-shaped fixed bar attached between 18a.

With the above-mentioned structure, after an emergency, the upper hook 25 is held on the handrail of the veranda or other suitable fixing portion, and then the lower hanging bar 11.14 is linearly extended to extend the ladder. In the case where it is configured and attached to the wall surface of the building, even when it approaches a portion corresponding to the recessed portion of the wall surface, the shaft attachment portion 17a. 17c. 17e ...
., 18a. 18c. 18e ... and the shaft attachment portions 17b. 17d. 17f ..., 18b. 18
d. 18f ... and a substantially U-shaped fixed bar 20a. 20b. In order to prevent the ladder 20c from bending in the front-rear depth direction, only the foot portion of the evacuee is extended in the depth direction to be in an abnormal position, and the risk of barely supporting the weight by the hand portion can be eliminated.

The U-shaped fixed bar 20a. Two
0b. 20c ... are folded so as to be sequentially folded in a state of being tilted from the vertical direction to the horizontal direction as the ladder is folded.

Two folds left and right 1 which are further foldable
The hanging hook 25 attached to the upper end of the pair of hanging bars 11.14 is urged in the direction in which the opening of the hook is constantly closed by the spring 26a, which is axially attached to one opening edge of the hanging hook 25. When the hook 25 is attached to the handrail of the veranda in an emergency, the lock claw 26 always closes the opening of the hook to prevent the hook 25 from coming off.

[0019]

As described above, according to the present invention, a plurality of connecting bars each having a constant length are axially rotatably attached to each other at respective end portions by axial attachment portions and sequentially connected in a vertical direction. The suspension bars of are two pairs of left and right with a fixed interval between them,
Horizontal cross rails are attached to the shaft attachment portions at the longitudinally intermittent portions between the pair of suspension bars to make them foldable in the height direction, and the shaft attachment portions to which the horizontal rails are attached are adjacent to this. Since a substantially U-shaped fixed bar is attached between the shaft mounting part and the shaft mounting part, when the ladder is extended to fit the wall surface of the building during an emergency descent, there is a recess on the side wall surface of the wall. In addition, even in a place where the wall surface disappears from the middle, a substantially U-shaped fixed bar attached between the shaft mounting part to which the horizontal rail is attached and the shaft mounting part adjacent to this is the front and rear of the ladder. Prevents flexing in the depth direction, so that only the evacuee's feet are extended in the depth direction and become an abnormal position, and it is possible to eliminate the risk of barely supporting the weight by the hand part, stable, safe and quick. Sure evacuation Rukoto is possible.

Further, regarding each connecting bar in a series of suspension bars that are rotatably and axially rotatably coupled to each other by a shaft-attaching portion and are successively connected in the longitudinal direction, this is respectively attached to the shaft-attaching portion at the intermittent portion. In the case where two sheets are arranged in the front-rear depth direction with a slight gap interposed between the horizontally mounted end portions of the horizontal rail, the stability of the ladder in the front-rear depth direction is further improved.

Two folds left and right 1 further foldable
A hanging hook is attached to the upper ends of the pair of hanging bars, and the opening of the hook is constantly closed by a spring, which is axially attached to one opening edge of the hanging hook. In the case of attaching a lock claw that is biased in the direction, when this hook is hung on the handrail of the veranda in an emergency, the lock claw always closes the opening of the hook, so the hook is kept from the handrail. It is possible to ensure sufficient safety during evacuation and ensure reliability without accidentally leaving.

[Brief description of drawings]

FIG. 1 is a front view of a ladder according to an embodiment of the present invention in a partially stretched state.

FIG. 2 is a side view of a ladder showing another embodiment of the present invention in a partially stretched state.

FIG. 3 is a schematic explanatory view showing a usage state of the ladder according to the present invention.

FIG. 4 is an overall perspective view showing a conventionally known folding ladder.

FIG. 5 is a schematic explanatory view showing a usage state of the ladder shown in FIG.

[Explanation of symbols]

 11 Suspension Bar 12 Coupling Bar 13 Coupling Bar 14 Suspension Bar 15 Coupling Bar 16 Coupling Bar 17 Shaft Attachment 18 Shaft Attachment 19 Side Rail 20 U-shaped Fixing Bar 21 Pin 24 Chain 25 Hook 26 Lock Claw 26a Spring

Claims (4)

[Claims] 1. A suspension bar comprising a plurality of connecting bars of a fixed length, each end of which is rotatably pivoted to each other by a shaft-attaching portion so as to be successively connected in the longitudinal direction, to form a hanging bar. 2 pairs of right and left are arranged at regular intervals, and horizontal bars are attached between the pair of suspension bars to the shaft attachment portions at the longitudinally intermittent portions so as to be foldable in the height direction, and There is approximately U between the shaft mounting part to which the horizontal rail is attached and the shaft mounting part adjacent thereto.
A foldable ladder characterized in that it is equipped with a letter-shaped fixed bar. 2. A connecting bar in a series of suspension bars, which are pivotally attached to each other by a shaft attachment portion and sequentially connected in a longitudinal direction, are horizontally arranged with respect to the shaft attachment portion at an intermittent portion. 2. The foldable ladder according to claim 1, wherein the foldable ladder is composed of two sheets each in the front-rear depth direction with a slight gap therebetween so as to sandwich the end portion of the attached cross rail. 3. The folding ladder according to claim 1, wherein a hanging hook is attached to the upper ends of a pair of left and right hanging bars that are foldable. 4. A hanging hook is attached to the upper end of a pair of left and right hanging bars that are foldable, and the hanging hook has one opening edge. 2. The foldable ladder according to claim 1, wherein a lock claw, which is axially attached and always biased by a spring in a direction of closing the opening of the hook, is attached.