JPH0813966A - Simplified ladder - Google Patents

Abstract

PURPOSE:To simplify a fire escape ladder by providing foothold sitting sections alternately in the right and left directions vertically at prescribed intervals on one ladder main body, and removably coupling foothold bodies having foot bar sections. CONSTITUTION:A foothold body 6 having a U-shaped cross section and extended with a foot bar section 5 on one side is inserted into a foothold fitting section (a) constituted of a pair of foothold insertion sections 2, 3 and a foothold hook section 4 provided on a ladder main body 1, and the foot bar 5 is protruded from the side wall of the main body 1. The next foothold body 6 is inserted into the foothold fitting section (a) on the opposite side, and the foot bar sections 5 of multiple foothold bodies 6 are alternately protruded on the right and left in sequence on one ladder main body 1 to form a simplified ladder A. When the ladder A is not used, the foothold bodies 6 are removed, and the ladder A is stored as only the ladder main body 1. The ladder main body 1 can be disassembled into multiple hollow bodies or connected as required, and the foothold bodies 6 concurrently serve as set pins. The ladder A can be miniaturized, simply assembled, disassembled, stored, and transported, and it can be manufactured at a low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple ladder which is easy to assemble and disassemble, does not need to be stored in a storage place, and can be used as an emergency evacuation ladder for general households.

[0002]

2. Description of the Related Art Conventionally, a ladder used for climbing to a high place such as a roof has two or more parent pillars each having a predetermined length and made of wood or metal, and a predetermined number of horizontal bars (steps). The installation is done with a space between them, and this is used as a footrest. In the case of a wooden ladder, the cross bar is usually a square bar and is fixed to the main pillar by a tenon assembly. In addition, the one made of metal is a C-shaped channel material, or a long rectangular cylinder is used as a parent pillar, and a pair of two parent pillars are provided with treads made of square pipes at regular intervals. When using any of these, lean them up and down on the roof or the like to climb up and down. There is also a double telescopic type made of this metal. This telescopic type is one in which one ladder body is slidably connected to the other, so Depending on the height, extend one of the ladders to use. In addition, there is also a ladder that can be folded from the middle with this metal ladder, and it is used as a ladder when extended and used as a ladder.

However, since each of the conventional ladders has a structure in which a plurality of crossbars are fixed to a pair of two main pillars at intervals, the whole ladder is bulky with a long body having a constant width. Because it is a thing, when not in use, when storing,
It was very inconvenient to carry or handle by car. Also, when used as an emergency evacuation ladder for general households, the installation location was poor and the responsiveness was poor.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems of the prior art. The object of the present invention is to provide a ladder main body made of a hollow or the like with a footrest penetrating portion whose opening directions are left and right staggered. A footrest mounting part consisting of a footrest locking part is provided, and a footrest with a U-shaped cross section is detachably engaged with this footrest mounting part so that it can be disassembled compactly when not in use for convenient storage and transportation. The purpose is to provide simple ladders that are optimal for emergency evacuation ladders.

[0005]

Means for Solving the Problems A means for a simple ladder according to the present invention for achieving the above object is to provide a single hollow or solid ladder main body with a predetermined interval in the vertical direction and left and right. A footrest mounting portion composed of a pair of footrest penetrating portions and a footrest locking portion is provided in alternate directions, and a footrest body having a U-shaped cross section extending to one side is detachably engageable with the footrest mounting portion. It is characterized in that they are engaged. or,
The present invention relates to a case where the ladder main body is a hollow body, the footrest penetrating portion of the footrest mounting portion is a pair of corresponding holes, and the footrest locking portion is a single hole, and the ladder body is a hollow body and is disassembled into a plurality of pieces. It can be connected, and the case where the footrest is fitted into each connecting part and also serves as a retaining pin, the case where the footrest is formed of a flat plate material, and the hole of the footrest attachment part is rectangular, There is a case where it is fixed to the ladder main body by a stopper member for preventing falling out, and the ladder main body is formed of a strong material, that is, made of light metal, hard plastic, wood, etc. so,
A hollow metal, which is convenient for transportation, is preferable, and the footrest may be formed by bending a metal rod into a U-shape or by molding.

[0006]

When the simple ladder according to the present invention is used to go up and down on a roof, etc., the footrest mounting portion consisting of a pair of footrest penetrating portions and footrest locking portions has a U-shaped cross section and the tread portion extends to one side. Engage the provided footrests, and then engage the next footrests with the footrest attachment part provided on the opposite side to the above, and attach a plurality of footrests one after the other in a staggered fashion to one ladder body. After forming a ladder having staggered treads, the ladder is leaned against an elevating site and the legs are raised and lowered. After use, remove each leg rest engaged with the ladder body as it is to make only the ladder body,
This is a rod-shaped ladder body that is convenient for storage and transportation.

Also, in the case where the ladder main body is a hollow body, the footrest penetrating portion of the footrest mounting portion is a pair of corresponding holes, and the footrest locking portion is a single hole, the cross section is U-shaped and the tread portion is provided on one side. Insert the extended footrest into the holes of each footrest attachment part, project the tread part from one side, and attach the footrest as desired.
Further, the next footrest is inserted into the hole of the footrest mounting portion provided in the opposite direction to the above, the tread portion is projected from the side opposite to the above to attach the footrest, and another footrest is attached. After mounting the stairs in a staggered manner in the same manner as above, form a ladder with left and right staggered ridges on one ladder body, then lean this ladder up and down on the raising and lowering site and step up and down with the legs. . Further, after use, the foot rests attached to the ladder body are sequentially extracted to make it convenient to use as a single rod-shaped ladder body as a whole.

Furthermore, in the case where the ladder main body is a hollow body and can be disassembled into a plurality of pieces and can be connected in series, and the foot hanging body is inserted into each connecting portion and also serves as a retaining pin, one side has a U-shaped cross section. A footrest with an extended tread section,
Insert the footrest part into the hole of the footrest attachment part provided in the connection part of the ladder main body and project the tread part from one side to attach the footrest body in a predetermined manner. In order to form a long ladder, insert the next footrest into the hole of the footrest attachment part provided on the side opposite to the above, and project the tread part from the side opposite to the above. After mounting the foot rests, and then mounting the other foot rests in a staggered manner in the same manner as above, form a ladder with left and right staggers on one ladder body, and then place this ladder on the lifting site. Lean, and put a foot on the tread to raise and lower. After use, the foot rest attached to the ladder body is removed.

According to the present invention, even when the footrest is formed in a flat plate shape and has a U-shaped cross section, and the footrest mounting portion is rectangular, it is assembled in exactly the same manner as described above and one ladder main body has left and right staggered steps. After forming a simple ladder with a protruding protrusion,
The ladder is leaned against a predetermined position, and a foot is put on the stepping member to move up and down. Further, in the present invention, the attached footrest may be fixed to the ladder main body by a stopper member for preventing the footrest from slipping off. Since it does not fall out, safety is greatly improved.

[0010]

EXAMPLE An example of a simple ladder according to the present invention will now be described with reference to the drawings. A simple ladder A according to this example shows a hollow ladder main body and a rod-shaped footrest body. The ladder main body 1 of the book and a pair of footrest penetrating portions 2, 3 with a predetermined gap in the up-down direction and in a left-right staggered direction.
And a footrest mounting portion a including the footrest locking portion 4,
The ladder main body 1 is a long, hollow hollow body made of a light metal, and is composed of a footrest body 6 having a U-shaped cross-section which extends in one side and is detachably engaged with the footrest attachment portion a. As shown in FIG. 2, legs 7 are detachably attached to both ends in a T-shape in the front so as to allow stable seating at the installation location. The ladder body 1 may use a long columnar body as shown in FIG. Further, although not shown in the drawings, there are also cases where a solid long square or columnar material is used. This solid material is excellent in strength but heavy in weight.
Further, the hollow material is excellent in weight and convenient for transportation.

Next, the footrest mounting portion a to which the footrest body 6 can be detachably mounted is a footrest comprising a pair of corresponding holes provided in one side wall 8 and the other side wall 9 in the ladder body 1 of the prismatic body. It is composed of penetrating portions 2 and 3 and a footrest locking portion 4 consisting of a single hole formed in the footrest penetrating portion 2 of one side wall 8 in a slightly downward direction. A predetermined number of steps are formed in a left-right staggered direction at predetermined intervals.

Further, as shown in FIG. 1, the footrest body 6 includes a fitting insertion portion 6a for bending the rod material into a substantially U-shape on the front and inserting it into the footrest penetration portions 2 and 3 of the ladder body 1, and a footrest member. Stop 4
The footrest body 6 is composed of a protrusion-shaped engaging portion 6b to be inserted into and a tread portion 5 extending from the fitting and inserting portion 6a, and the footrest body 6 is detachably attached to the footrest attachment portion a. As shown in FIG. 7 and FIG. 8, even if the ladder body 1 is tilted to the example by stopping it on the footrest body 6 inserted into the ladder body 1 with a stop member 10 such as a strong rubber band, the footrest body 6 is easy. There is a case where it does not fall out, but although it is not shown in the drawing, a pin for preventing dropout is inserted, or the footrest body 6 is formed with a screw rod and the screw part of this There is also a case where the nut of is screwed.

As described above, when the simple ladder A according to this embodiment is assembled and used, the pair of footrest penetrating portions 2, 3 are used.
And a footrest body 6 having a U-shaped cross section and having a tread portion 5 extended on one side, is inserted into a footrest mounting portion a composed of the footrest locking portion 4, and the tread portion 5 of the footrest portion 5 of the ladder main body 1 is attached. The foot rests 6 are projected from the side wall, and the next foot rests 6 are fitted into the foot rest attachment parts a provided on the opposite side to the above, and the plurality of foot rests 6 are sequentially staggered to alternately mount the tread portions 5 left and right. After forming a simple ladder A composed of one projecting ladder main body 1, the simple ladder A is leaned against an elevating and lowering site, and the foot 5 is put on and lifted up. After use, the foot rests 6 fitted into the ladder body 1 are taken out as they are to make only the ladder body 1, and the whole body is made into one rod-shaped ladder body 1 and stored.
It is convenient for transportation.

Next, another embodiment of the simple ladder according to the present invention will be described with reference to FIGS. 4 and 5. In this embodiment, the ladder body 1'is a hollow body and can be disassembled into a plurality of pieces and connected in series. The ladder body 1'is composed of a plurality of expandable and contractible ladder bodies 1a, 1b, 1c. The overlapping connecting portions 11 of the main bodies 1a, 1b, 1c and the respective ladder main bodies 1a, 1b, 1c are respectively
In the ladder main body 1 ', the footrest penetrating portions 2'and 3'consisting of a pair of corresponding holes provided in one side wall 8'and the other side wall 9', and below the footrest penetrating portion 2'of the one side wall 8 '. A footrest mounting portion a'consisting of a footrest locking portion 4'consisting of one hole formed is provided. The footrest mounting portions a'are formed on the ladder main body 1'by a predetermined number of steps in a left-right staggered direction at predetermined intervals in the vertical direction. The footrest body 6'which is fitted and inserted into the footrest mounting portion a'is bent in a substantially U-shape on the front and inserted into the footrest penetration portions 2'and 3'of the ladder body 1 ', and the footrest locking. The footrest body 6 is composed of a protrusion-like locking portion 6b which is fitted and inserted into the portion 4'and a tread portion 5'extending from the fitting and inserting portion 6a.
It is detachably attached to and is inserted into the footrest mounting portion a'of the connecting portion 11 so that it acts as a stopper of the connecting portion 11 and holds the ladder body 1'in a long state.

Another embodiment of the present invention will be described with reference to FIG. 6. In this embodiment, the footrest 6 is made of a flat plate material, and the hole for the footrest attachment portion a is rectangular. The ladder main body 1 made of a prismatic body is provided with a footrest mounting portion a to which the footrest body 6 can be detachably mounted, and the footrest mounting portion a corresponds to one side wall 8 of the prismatic body of the ladder body 1. Footrest penetrating portions 2 and 3 formed of a pair of horizontally long rectangular corresponding holes provided on the other side wall 9 and a footrest locking portion 4 composed of one hole formed below the footrest penetrating portion 2 of one side wall 8.
The footrest mounting portions a are formed on the ladder body 1 at predetermined intervals in the vertical direction and in a left-right staggered direction by a predetermined number of steps.

[0016]

As described above, the simple ladder according to the present invention is
A single ladder body that is hollow or solid is provided with a footrest mounting portion that is composed of a pair of footrest penetrating portions and a footrest locking portion at predetermined intervals in the up-down direction and in a left-right staggered direction.
Since the footrest mounting portion is configured such that a footrest body having a U-shaped cross section and one of which extends on one side is detachably engaged with the footrest mounting portion, when assembling, the footrest body is directly fitted to the footrest mounting portion. Since it is assembled only by inserting it, it does not require any special technique or tool for assembling, it can be formed very easily, and disassembly is also very simple. Also, since the ladder main body consists of a single unit, and the footrests attached to it can be removed freely, the entire ladder can be made smaller and it is not bulky, so when not in use, when storing it, transporting it in a vehicle etc. It is extremely convenient and easy to handle, and has a unique effect that it can be safely and reliably moved up and down.

Further, according to the present invention, when the ladder main body is a hollow body, the footrest penetrating portion of the footrest mounting portion is a pair of corresponding holes, and the footrest locking portion is one hole, it is extremely easy to make a hole. It can be easily manufactured and can be offered at low cost.
There is an effect in implementation that assembly and disassembly are easy.

Further, the ladder main body is a hollow body and can be disassembled into a plurality of pieces and can be connected in series, and the footrests are fitted into the respective connecting portions to serve also as the retaining pins.
Since the long ladder body can be shortened and the whole can be made more compact, there is an effect in that it is convenient for storage and transportation.

Further, according to the present invention, when the footrest is formed of a flat plate material and the hole of the footrest attachment portion is rectangular, the tread portion and the fitting / inserting portion to the ladder body have a plate shape and have a width. There is an effect on the operation that can be surely hung up and raised and lowered safely.

In the present invention, when the attached footrest is fixed to the main body of the ladder by a retaining member such as a rubber band having a strong strength, the main body of the ladder is conveyed or moved. Even if the foot is tilted, the footrest does not easily fall off, so that the safety is greatly improved, which is an effect in practice.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an assembled state showing an embodiment of a simple ladder according to the present invention.

FIG. 2 is a front view of the simplified ladder of the embodiment with a part broken and a part omitted.

FIG. 3 is a perspective view of essential parts showing a ladder main body formed of a cylindrical body in the embodiment.

FIG. 4 is a perspective view of a main part showing another embodiment.

FIG. 5 is an enlarged cross-sectional view showing the configuration of the main parts of the embodiment.

FIG. 6 is a perspective view of a main part showing still another embodiment.

FIG. 7 is a cross-sectional view of a main part showing an example in which a stopper member for preventing slipping out is provided on the attached footrest in the embodiment.

FIG. 8 is a perspective view showing a main configuration of the same embodiment.

[Explanation of symbols]

 1 Ladder main body 2, 3 Foot rest penetration part 4, Foot rest locking part a Foot rest mounting part 5 Stepping part 6 Foot rest body 1a, 1b, 1c Ladder body 2 ', 3' Foot rest penetration part 4'Leg rest part a ' Footrest mounting part 5'Tread part 6'Footrest body 10 Stop member

Claims (5)

[Claims] 1. A single hollow or solid ladder main body, with a predetermined interval in the up-down direction, and left-right staggered orientations,
A footrest mounting portion including a pair of footrest penetrating portions and a footrest locking portion is provided, and a footrest body having a U-shaped cross section and a tread portion extending on one side is detachably engaged with the footrest mounting portion. Ladder characterized by. 2. The simple ladder according to claim 1, wherein the ladder main body is a hollow body, the footrest penetrating portion of the footrest mounting portion is a pair of corresponding holes, and the footrest locking portion is one hole. 3. The ladder main body is a hollow body that can be disassembled into a plurality of pieces and can be connected in series, and the footrest body is fitted and inserted into each connection portion so as to also function as a retaining pin. Simple ladder described. 4. The simple ladder according to claim 1, wherein the footrest is made of a flat plate material and the hole of the footrest attachment portion is rectangular. 5. The simple ladder according to claim 1, wherein the attached footrest is fixed to the ladder main body by a stopper member for preventing it from coming off.