JP2000310093A - Foldable accommodation ladder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foldable accommodation ladder, to be safely installed and capable of effectively using a space. SOLUTION: Stepping members 4-7 are provided between columns 2, 3 and hinge portions 2B, 3B are mounted on the columns 2, 3 to form a foldable accommodation ladder. Fixed hardwares 11, 12 are slidably provided on the columns 2, 3 so that the foldable accommodation ladder 1 can be installed stably even in a vertical state by holding an opening slab of a manhole with fixed hardwares 11, 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable ramp which is suitable for elevating a manhole or the like.

[0002]

2. Description of the Related Art For example, when ascending and descending from a manhole into a pit, conventionally, an aluminum ladder or a ready-made aluminum trap is used.

[0003]

However, when a ladder is used, the ladder is set up leaning on the diagonal, so that the effective opening of the manhole is narrowed, and when passing through the manhole, it becomes cramped and obstructs the ascending and descending. Problem arises. On the other hand, ready-made aluminum wraps are not stable because they are hooked to the end of the manhole slab. Further, there is another problem that ladders, ready-made ramps and the like are cumbersome to handle because they are of a fixed length.

[0004] It is therefore an object of the present invention to provide a collapsible tarp which can solve the above-mentioned problems in the prior art.

[0005]

According to the present invention, there is provided, in accordance with the present invention, a tarp comprising a plurality of footrests provided at appropriate intervals between a pair of support members, wherein the tarp is foldable. A hinge mechanism provided on the pair of support members, a lock mechanism provided on the hinge mechanism so as to maintain a desired state of the collapse when the collapse and extension of the ramp are performed, and a slide mechanism slidable on the support member. And a fixing hardware for fixing the ramp to the supporting frame so as to sandwich the supporting frame.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a folding ramp according to the present invention. The folding ramp 1 includes a footrest member 4 between a pair of columns 2 and 3.
To 7 are provided at appropriate intervals,
The bent portions 2A, 3A are formed at the tip end of the. Note that the number of footrest members is not limited to four, and an arbitrary number can be appropriately provided.

The pillars 2 and 3 are provided with hinge portions 2B and 3B, respectively, and the hinge portions 2B and 3B constitute a hinge mechanism 8 for making the foldable wrap 1 freely bendable into two.

In this embodiment, the support 2 is an upper support 21
And a lower support 22. The upper support 21 and the lower support 22 are connected to each other by a hinge 2 </ b> B so as to be bendable. Similarly, the support 3 also includes an upper support 31 and a lower support 32.
The upper support 31 and the lower support 32 are foldably connected by a hinge 3B.

Although not shown in the drawings, the hinge 2B
Is provided with a lock mechanism of a free type in which the extending direction is free and the folding direction is unlocked. The same applies to the hinge portion 3B. For this reason, the folding ramp 1
The folding ramp 1 can be held in a desired state at the time of folding and extension.

Fixing hardware 11 and 12 are provided on the columns 2 and 3, respectively, so that the collapsible ramp 1 can be firmly fixed to a support frame such as a manhole opening slab.

The fixing hardware 11 comprises a pair of upper and lower L-shaped fitting members 11A and 11B. L-shaped fitting member 11
In A, the sleeve 11Ab is formed integrally with the holding arm 11Aa, and the L-shaped fitting member 11B is similarly formed by integrally forming the sleeve 11Bb with the holding arm 11Ba. The fixing hardware 11 includes the respective sleeves 11Ab, 11Ab.
Bb is slidably fitted to the upper support 21 and the nuts 11Ac and 11Bc are screwed into the upper support 21 so that the holding arm 11Aa and the holding arm 11Ba face each other as shown in FIG. be able to.

The reference numerals 11Ad and 11Bd denote non-slip grooves provided on the holding arms 11A and 11B for securing a required holding force.

The fixing hardware 12 is also composed of a pair of L-shaped fitting members 12A and 12B, similarly to the above-mentioned fixing hardware 11, and is similarly slidably attached to the upper support 21. Omitted.

FIG. 2 is a perspective view of the folding turret 1 shown in FIG.
FIG. 3 is a diagram illustrating an example of a case where the fixing is performed by using No. 12, and FIG.

As can be seen from FIGS. 2 and 3, the folding ramp 1 is lowered vertically from the opening 101 of the manhole, and the folding ramp 1 is fixed to the opening slab 100 by sandwiching the opening slab 100 from above and below with the fixing hardware 11. are doing. In this case, the L-shaped bracket member 11
The distance between A and the L-shaped fitting member 11B is the opening slab 1
It can be easily adjusted according to the thickness T of 00.

As shown in FIG. 4, the L-shaped bracket member 1
The portion of the upper support 21 corresponding to the nut 11Ac for fixing 1A is a flat surface 21A. Therefore,
When the nut 11Ac is screwed in, the tip (not shown) of the nut 11Ac abuts the flat surface 21A, whereby the L-shaped bracket member 11A can be firmly fixed to the upper support 21. Other L-shaped fitting members 11B, 12A, 1
The mounting method of 2B is exactly the same.

The sleeve 1 of the L-shaped fitting member 11A
A slit SA is formed in 1Ab, and the end 5A of the footrest member 5 is thinned so as to be able to communicate with the slit SA by immersion. Therefore, FIG.
As can be understood from FIG. 11, the L-shaped fitting member 11A is rotated while being fitted to the upper column 21, and the slit SA is formed at the end 5A.
, The L-shaped fitting member 11A can be freely slid on the upper support 21. Therefore, the L-shaped fitting member 11A can be moved to and fixed at an arbitrary position on the upper column 21.

The other end 5B of the footrest member 5 is also thinned like the end 5A, and the L-shaped fitting 12A can be slid by aligning the slit SB of the L-shaped fitting 12A with the end 5B. (See FIG. 3). L
The same applies to the V-shaped fitting members 11B and 12B.

In FIG. 2, only the fixing hardware 11 is visible, but as can be seen from FIG. 3, the fixing hardware 12 similarly sandwiches the opening slab 100, whereby the collapsible tarp 1 is attached to the opening slab 100. Firmly fixed,
Moreover, the folding ramp 1 can be kept vertical. Therefore, even if the folding type ramp 1 is installed in a narrow manhole, it does not hinder the ascent and descent of the folding type ramp, and the wobbling of the folding type ramp 1 is reliably suppressed, and the safety at the time of ascent and descent is improved. In addition, it is needless to say that the folding ramp 1 can be used in the same manner for lifting and lowering a place other than the manhole.

Further, since the foldable wrap 1 can be folded as shown in FIG. 5, handling and stocking become easy. In addition, in FIG.
1, 1 and 12 are not shown.

If the folding folding wrap 1 described above is made of aluminum, it is easy to carry. Also,
Since the folding ramp 1 can be lifted from the lower part of the pit and fixed to the opening slab 100 of the manhole, problems such as waterproofing work do not occur. 2 as fixed length
By preparing up to three types, it is possible to deal with pits of a considerable depth.

[0023]

According to the present invention, as described above, the folding can be performed, so that the handling and stocking of the ramp can be facilitated. In addition, since the ramp can be firmly fixed to the supporting frame by using the fixing hardware, it can be inclined to the supporting frame. There is no need to maintain the safety by leaning, and the installation space is not taken up, so that it is hardly obstructed even in a small place, and the space can be effectively used. In addition, the wobble of the ramp disappears,
The safety at the time of elevating can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a folding ramp according to the present invention.

FIG. 2 is a diagram showing an example of a case where the folding ramp shown in FIG. 1 is fixed to an opening slab of a manhole using a fixing hardware.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is an enlarged perspective view of a main part for explaining a state of attachment of the L-shaped fitting member shown in FIG. 1 to an upper support.

FIG. 5 is a schematic diagram showing a folded state of the folding ramp shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Folding ramp 2, 3 Prop 2B, 3B Hinge part 4, 5, 6, 7 Footrest member 8 Hinge mechanism 11, 12 Fixing hardware 11A, 11B, 12A, 12B L-shaped fitting member 100 Opening slab

Claims (1)

[Claims] 1. A ramp including a plurality of footrests provided at appropriate intervals between a pair of support members, a hinge mechanism provided on the pair of support members to enable the collapse of the overlap, and the ramp. A lock mechanism provided on the hinge mechanism so that the ramp can maintain a desired state when the tape is folded and extended, and a slidable clamp provided on the support member to clamp the ramp to the support frame. And a fixing hardware for fixing the folding stirrup.