JP2949462B2 - Folding ladder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an emergency fire ladder mainly installed in a general house, and more particularly to an improvement in safety and handling so as to be suitable for use in a place having irregularities on a side wall of a building. It was made.

[0002]

2. Description of the Related Art Various types of emergency ladders have been developed. Among them, as shown in FIG. 4, the horizontal rails 1 a to 1 k where a plurality of spacers 5.5 are attached to the back side where a plurality of the spacers are arranged in the vertical direction,
Each of the horizontal rails 1a to 1b is supported by columns 2a and 2b, each of which is rotatably mounted on a pin 4 at each end thereof and whose intermediate portion is also rotatably mounted on a pin 3 by a pin 3.
k are connected in series, and a hanging chain 6.6 and a hook 7.7 are attached to the upper end thereof.

[0003]

However, in the above-mentioned conventional structure, if there is a recess in the side wall surface of the building as a result of lack of stability in the back direction,
When the evacuee is in an emergency descent, as shown in FIG. 5, only the feet are in an abnormal position in the direction of the recess on the side wall surface of the building B, so that most of the weight is supported only by the hands. For this reason, it was not suitable for people with weak hands and arms, especially women, and evacuation often involved great danger.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention solves the above-mentioned various problems in the prior art, and increases safety in an evacuation ladder, particularly in the front-rear depth direction (wall direction), thereby improving safety. More specifically, a plurality of connecting bars of a certain length are connected to each other in a freely rotatable manner by a shaft attaching portion, and are sequentially connected in the longitudinal direction. The one hanging bar is a pair of left and right at a certain interval from each other, and a horizontal cross bar is provided between the pair of hanging bars with respect to the axially attached portion of the vertically intermittent portion. The above-described series of suspensions is performed by attaching a substantially U-shaped fixing bar between a shaft attachment portion to which the horizontal bar is attached and an adjacent shaft attachment portion so as to be freely foldable in the height direction when attached. U-shaped fixation when the bar is stretched linearly Over relates collapsible ladder characterized by comprising configured to be positioned toward the vertical direction.

Further, according to the present invention, each connecting bar of a series of hanging bars which are rotatably mounted on each other by a shaft mounting portion and sequentially connected in the longitudinal direction is connected to the shaft mounting portion at the intermittent portion. The present invention also relates to a foldable ladder that is configured with two pieces each in the front-rear depth direction with a slight gap interposed therebetween so as to sandwich an end of a horizontally mounted horizontal rail.

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

Further, according to the present invention, a hanging hook is attached to the upper end of a pair of left and right hanging bars which are foldable, and one of the hanging hooks is attached to the hanging hook. The present invention also relates to a foldable ladder to which a locking claw, which is axially attached to an opening edge and constantly biased by a spring in a direction to close an opening of a hook, is attached.

[0008]

When a ladder is stretched and attached to the wall of a building during an emergency descent, even when the ladder is approaching a portion corresponding to a concave portion of the wall, a shaft mounting portion provided with a horizontal rail and a shaft mounting adjacent thereto are provided. As a result, the substantially U-shaped fixing bar attached between the ladder and the ladder is positioned in the vertical direction, thereby preventing the ladder from bending in the depth direction. It is possible to eliminate the danger of barely supporting the weight by the hand portion.

Further, the above-mentioned U-shaped fixing bar is folded so as to be sequentially folded in a state of being tilted from the vertical direction to the horizontal direction with the folding of the ladder, so that it is not bulky. The feeding operation is smooth and operation is ensured.

[0010] Further, two left and right 1 which are configured to be freely foldable
The hanging hook attached to the upper end of the pair of hanging bars has a locking claw, which is attached to one opening edge thereof and is always urged by a spring in a direction to close the opening of the hook. When the hook is attached to the handrail of the veranda in an emergency, the hook is not easily detached from the handrail because the lock claw closes the opening of the hook when the hook is hooked. In this case, safety can be sufficiently guaranteed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific contents of the present invention will be described below with reference to FIGS.
To explain with reference to the third embodiment, reference numerals 11 and 14 denote a series of hanging bars, 19 denotes a horizontal rail, and 25 denotes 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 is attached to a shaft attachment portion 17a. 17b. 17c. 17d
And 18a. 18b. 18c. 18d. , A series of hanging bars rotatably attached to each other and sequentially connected in the vertical direction.

Further, the series of hanging bars 11 and 1
4 are arranged as a pair of left and right at a fixed interval 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. .. Between the shaft attachment portions at the respective vertical intermittent portions. 19b. 19c. Are rotatably mounted so that they can be folded in the height direction. 19b. 19c. Are attached. 17c. 17e. ..., 19a.
19c. 19e and the shaft attachment portions 17b. 17
d. 17f ..., 18b. 18d. 18f and a substantially U-shaped fixing bar 20a. 20b. 20c are attached.

In this case, the above-mentioned series of hanging bars 11 and 14 are connected to the connecting bars 12a. 12b. 12c,
.., 15a. 15b. , 15c.. 17c. 17e ..., 18a. 18
c. 18e... Horizontally attached to each other. 19b. The connecting bars 16 of the same size as each connecting bar with a slight gap therebetween to sandwich the end of 19c.
a. 16b. When the two ladders are arranged in the front-rear depth direction so as to follow 16c, 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 below as shown in FIG. 2, and furthermore, the interval between the openings can be freely adjusted. A plurality of bolt holes are formed at appropriate intervals in the overlapped portion, and a bolt 25 is formed using any one of the bolt holes.
c to form a hook main body 25a and an auxiliary hook 25b, and the lower end of one of the hook main bodies 25a is connected to the chain 24, and the other auxiliary hook 25
At the lower end of b, a lock claw 26 is provided rotatably by the pin 21 so that the tip always urges in the direction of closing the opening of the hook through the spring 26a.

In the figure, reference numeral 23 denotes the uppermost horizontal rail 19.
a so as to be horizontal along the length direction of the shaft mounting portions 17a. Represents a substantially U-shaped fixing bar attached between 18a.

With the above structure, the upper hook 25 is held in a handrail of the veranda or other appropriate fixing point in an emergency, and then the lower series of hanging bars 11.14 are linearly extended to extend the ladder. When this is attached to the wall surface of the building, and it reaches the portion corresponding to the concave 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 approximately U-shaped fixing bar 20a. 20b. 20c... Are positioned in the vertical direction, respectively, to prevent the ladder from bending in the front-rear depth direction, so that only the feet of the evacuees are stretched in the depth direction to be in an abnormal position, and barely gain weight by the hands. The danger of supporting can be eliminated.

The U-shaped fixing bar 20a. 2
0b. 20c are folded so as to be sequentially folded in a state of being inclined from the vertical direction to the horizontal direction with the folding of the ladder.

Further, the two left and right units 1 are configured to be freely foldable.
The hanging hook 25 attached to the upper end of the pair of hanging bars 11.14 is urged in the direction of always closing the hook opening by a spring 26a, which is axially attached to one opening edge of the hanging hook 25. When the hook 25 is hung on a handrail of a veranda or the like in an emergency, the lock claw 26 always closes the opening of the hook to prevent the hook from being released.

[0019]

As described above, according to the present invention, a plurality of connecting bars each having a predetermined length are pivotally connected to each other at respective ends by pivoting portions so as to be sequentially connected in the longitudinal direction. , The hanging bar of the two pairs of left and right at a certain interval from each other,
A horizontal bar is attached between the pair of hanging bars with respect to the shaft mounting portion at the intermittent portion in the vertical direction so as to be freely foldable in the height direction. By attaching a substantially U-shaped fixing bar between the shaft mounting portion and the shaft mounting portion, when the above-described series of hanging bars is linearly extended, the U-shaped fixing bar is positioned in the vertical direction. In the case of extending the ladder at the time of emergency descent and attaching it to the wall of the building,
Even in a place where there is a recess on the side wall surface of the wall surface or where the wall surface disappears halfway, a substantially U-shape attached between the shaft mounting portion to which the horizontal rail is mounted and the shaft mounting portion adjacent thereto The fixed bar in the vertical direction prevents the ladder from bending in the front-rear direction, so that only the feet of the evacuees are stretched in the depth direction, resulting in an abnormal position, and the risk of barely supporting the weight by the hands. Evacuation can be performed stably and safely and quickly and reliably.

Further, each of the connecting bars in a series of hanging bars which are rotatably mounted on each other by the shaft mounting portion and sequentially connected in the longitudinal direction, is connected to the shaft mounting portion at the intermittent portion. In the case where each of the two ladders is formed in the front-rear depth direction with a slight gap interposed therebetween so as to sandwich the end of the horizontally mounted horizontal rail, the stability of the ladder in the front-rear depth direction is further improved.

Further, the two left and right 1 units are configured to be freely foldable.
A hook for hanging is attached to the upper end of the pair of hanging bars, and the opening of the hook is always closed by a spring which is axially attached to one opening edge of the hanging hook. If the hook is hooked on the handrail of the veranda in an emergency, the hook always closes the opening of the hook. It is possible to ensure the safety at the time of evacuation without inadvertent detachment, and to ensure the reliability.

[Brief description of the drawings]

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

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

FIG. 3 is a schematic explanatory view showing a use state of a 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 use state of the ladder shown in FIG. 4;

DESCRIPTION OF SYMBOLS 11 Hanging bar 12 Connecting bar 13 Connecting bar 14 Hanging bar 15 Connecting bar 16 Connecting bar 17 Shaft attachment part 18 Shaft attachment part 19 Side rail 20 U-shaped fixing bar 21 Pin 24 Chain 25 Hook 26 Lock claw 26a Spring

Claims (4)

(57) [Claims] A plurality of connecting bars each having a fixed length, each end of which is rotatably mounted on a shaft mounting portion so as to be rotatable relative to each other, and which are sequentially connected in the longitudinal direction, are connected to each other. A pair of left and right sides at a fixed interval, and a horizontal cross bar is attached to the hanging portion of the vertically intermittent portion between the pair of hanging bars so as to be freely foldable in the height direction, and A substantially U-shaped portion is provided between the shaft mounting portion to which the horizontal rail is attached and the shaft mounting portion adjacent thereto.
By attaching the U-shaped fixing bar, the U-shaped fixing bar is configured to be positioned in the vertical direction when the above-described series of hanging bars is linearly extended. Folding ladder. 2. A series of hanging bars, which are rotatably mounted on each other by a shaft mounting portion and sequentially connected in the longitudinal direction, are connected horizontally with respect to the shaft mounting portion at the intermittent portion. 2. The foldable ladder according to claim 1, wherein the ladder is composed of two pieces each in the front-rear depth direction with a slight gap interposed therebetween so as to sandwich an end of the attached horizontal rail. 3. The foldable ladder according to claim 1, wherein a hook for hanging is attached to an upper end of a pair of hanging bars that are freely foldable. 4. A hanging hook is attached to the upper end of a pair of left and right hanging bars that are freely foldable, and the hanging hook has one opening edge. 2. The foldable ladder according to claim 1, further comprising a lock claw, which is attached to the shaft and urged by a spring in such a direction as to always close the opening of the hook.