KR102280085B1 - Foldable working ladder - Google Patents

Abstract

According to the present invention, a foldable work ladder comprises: a plurality of supports; a plurality of stair plates provided for each floor on the plurality of supports; and work footholds coupled between the plurality of supports above the plurality of stair plates. The plurality of supports comprise: a plurality of leg units in pairs each having preset length; a handrail unit integrally extended from the plurality of leg units in a longitudinal direction to surround an upper side of the work foothold in all directions; and a hinge unit provided to the handrail unit to be rotatably coupled to enable the plurality of supports to be unfolded or folded. Therefore, the fence is integrally extended from the support having the foothold to improve safety.

Description

FOLDABLE WORKING LADDER

The present invention relates to a folding work ladder provided with a handrail.

Ladder can be divided into A-shaped folding ladder and Uma-shaped ladder. Folding ladders are mainly used for climbing up and down high or low places, and ox-type ladders are mainly used for moving between the two sides of the gap.

The legal use of ladders in many countries, including Korea, is to use a ladder to go up and down a high or low place, or to move between both sides of the ladder, but the reality is that it is often used for work by climbing on the stairs of the ladder. there is.

However, the ladder is mainly made of only a stair plate or even if a working platform is provided, there are often no handrails to protect the worker. The act of working using such a ladder is not only dangerous, but in principle, it is not permitted under the Industrial Safety Act in many countries including the Republic of Korea.

Accordingly, a ladder equipped with a handrail as well as a working scaffold is required. Patent Document 1 discloses an A-type ladder equipped with a working scaffold and handrail. The working scaffold disclosed in Patent Document 1 has both ends hinged to both supports, respectively, and the middle of the working scaffold is hinged to each other so as to be folded. Accordingly, when using a ladder, the working platform can be deployed together with both supports to serve as a scaffold, whereas when not using a ladder, it can be easily stored or moved because it is folded together with both supports.

In addition, the handrail disclosed in Patent Document 1 is fixed by inserting the upper ends of both supports into a pair of support members hinged. The handrail is formed in a semicircular shape and is fixed so that both ends are wrapped around each support member.

However, in the conventional ladder as described above, the handrail is coupled to be wrapped around the support member for hinged both ends of the support, so the stability of the handrail may not be sufficiently secured. Accordingly, when the fastening force of the support member for fixing the handrail is weakened, the handrail is separated from the support member and collapses, causing a fall of the operator, thereby causing a safety accident. In addition, since the handrail is formed in a semi-circular shape to work in a state in which the rear side is opened, a fall due to the operator's carelessness may result or work efficiency may be reduced due to psychological anxiety.

In addition, the conventional ladder, as the working platform is hinged to both ladders and hinged so that the middle is folded to each other, it may be vulnerable in terms of stability. In addition, there was a problem in that the structure of the work scaffold is complicated and the number of parts increases the number of assembling man-hours and the manufacturing cost increases.

In addition, the conventional ladder is not provided with a toe guard at the edge of the working scaffold, so when a working tool such as a hammer is placed on the working scaffold, the working tool falls due to the negligence of the worker, and other workers are injured or work efficiency is reduced. may be lowered.

Registered Utility Model Announcement No. 20-0444935 (Registration Date: 2009.06.10.)

It is an object of the present invention to provide a ladder for work having a handrail in which safety is ensured.

Furthermore, an object of the present invention is to provide a ladder for work in which the handrail is integrally formed or independently coupled to the support so that the structure is simple and the possibility of escape is excluded, thereby increasing safety and enabling easy deployment and folding of the handrail.

Furthermore, an object of the present invention is to provide a ladder for work in which the handrail is formed to surround the operator in all directions, so that the safety of the operator is further improved and thus the work efficiency can be improved.

Another object of the present invention is to provide a ladder for work with a work scaffold that can be stored simply and securely when not in use or when moving while ensuring stability when in use.

Furthermore, the present invention is to provide a ladder for work that can suppress the risk of collapse made of a single member of the working scaffold.

Furthermore, the present invention is to provide a ladder for work with increased safety by firmly fixing the working scaffold when receiving while stably supporting the working scaffold when deploying the working scaffold.

Another object of the present invention is to provide a ladder for work that is provided with a toe guard on the edge of the work scaffold, which can safely place a work tool such as a hammer on the work scaffold.

Furthermore, it is to provide a ladder for work that allows the toe pad to be easily folded.

Furthermore, it is intended to provide a ladder for work that can further increase safety by maintaining the toe pad in a deployed state.

In order to achieve the object of the present invention, a ladder for work in which the handrail extends integrally from the support having a footrest may be provided. Through this, the stability of the handrail is improved and the structure of the handrail is simplified, thereby reducing the manufacturing cost.

In addition, in order to achieve another object of the present invention, a ladder for work that can support one end of the scaffold as a step plate during deployment at the same time that the scaffold is formed of a single plate may be provided. Through this, it is possible to suppress the collapse of the footrest, thereby increasing safety, and at the same time making it easy to deploy or store.

In addition, in order to achieve another object of the present invention, a folding toe mat is provided on the edge of the footrest can be provided with a ladder for work so that the toe curtains overlap each other to be folded. Through this, work tools can be placed on the footrest during work, so work efficiency is improved, and work tools are prevented from falling due to operator's carelessness, thereby increasing safety.

In addition, in order to achieve the object of the present invention, a plurality of supports; a plurality of stair plates provided for each floor on the plurality of supports; and a working platform coupled between the plurality of supports on the upper side of the step plate, wherein the plurality of supports includes: a plurality of leg parts in pairs each having a predetermined length; a handrail extending integrally along the longitudinal direction from the plurality of leg parts to surround the upper side of the working scaffold in all directions; And it is provided on the handrail, the plurality of supports may be provided with a folding ladder for work including a hinge rotatably coupled to unfold or fold.

Here, the handrail portion, a longitudinal handrail extending in the longitudinal direction from the leg portion; and a transverse handrail extending in the width direction from the longitudinal handrail and connecting between the longitudinal handrails in all directions.

And, the longitudinal balustrade extends integrally from the leg portion, and the transverse balustrade is bent from the longitudinal balustrade toward the longitudinal balustrade facing each other and extends integrally with a first transverse balustrade and , and a second lateral balustrade connecting between sides of the first lateral balustrade facing each other, and the hinge part may be formed between the first lateral balustrade facing each other.

And, the outer surface of the bent portion extending from the first lateral handrail portion extending from the longitudinal handrail portion is bent or inclined in a direction to be narrowed upwardly, the width reduction portion is formed, and the inner surface of the bent portion is bent upwardly widening A reinforcement may be formed.

And, one end of the second lateral balustrade is rotatably coupled to the first lateral balustrade or the longitudinal balustrade facing it, and the other end of the second lateral balustrade has the second lateral balustrade facing it. 1 may be detachably coupled to the lateral handrail or the longitudinal handrail.

Here, one end of the working scaffold is hinged to one support among the plurality of supports, and the other end of the working scaffold is inserted into the step plate provided on the other support among the plurality of supports during deployment in the longitudinal and width directions. A footrest seating groove may be formed so as to be supported.

And, the side of the working scaffold is formed with a scaffold storage protrusion, and a part of the handrail may be formed with a scaffold receiving groove in which the scaffold storage protrusion of the working scaffold is accommodated when the working scaffold is folded.

Here, a plurality of toe mats are foldably coupled to the edge of the upper surface of the working scaffold along the circumference, and the plurality of toe mats may be arranged so that the ends of each toe mat overlap each other when folded.

And, between the working scaffold and the toe cover or between the toe cover may be further provided with a standing holding part for maintaining a standing state when the toe cover is deployed.

Here, the upper end of the support is further provided with an auxiliary workbench that is detachably coupled to the supporter, the auxiliary workbench, the auxiliary workbench being detachably seated on the upper surface of the supporter; and a plurality of longitudinal auxiliary railings extending in the longitudinal direction from the edge of the auxiliary working scaffold, and an auxiliary railing composed of a transverse auxiliary railing that connects and surrounds the plurality of longitudinal auxiliary railings in all directions. can do.

In addition, in order to achieve the object of the present invention, a plurality of supports; a plurality of stair plates provided for each floor on the plurality of supports; and a working platform coupled between the plurality of supports on the upper side of the step plate, wherein the plurality of supports have a predetermined length, and a plurality of legs in pairs are rotatably coupled to each other at the top. wealth; A plurality of handrails that are hinged rotatably from each of the plurality of leg parts to surround the upper side of the working scaffold in all directions when deployed; And it is provided between the plurality of legs and the plurality of handrails, respectively, the plurality of handrails can be provided a ladder for folding work comprising a handrail holding portion to maintain the deployed state.

Here, one end of the working scaffold is hinged to one support among the plurality of supports, and the other end of the working scaffold is inserted into the step plate provided on the other support among the plurality of supports during deployment in the longitudinal and width directions. A footrest seating groove may be formed so as to be supported.

Working ladder according to the present invention, as the handrail is formed in a structure that wraps around the perimeter in all directions from the upper side of the working scaffold, the safety of the worker working on the working ladder can be secured. Through this, the worker has psychological stability, and thus the work efficiency can be improved as much.

In addition, the working ladder according to the present invention, as the working scaffold is made of a single member and firmly fixed at both ends, it is possible to effectively suppress the risk of collapsing of the working scaffold when using the working ladder to spread it. In addition, when the work ladder is folded and stored or moved, it is possible to prevent safety accidents caused by the detachment of the work platform during storage or movement by hanging and fixing the work scaffold.

In addition, the working ladder according to the present invention is provided with a toe guard on the edge of the working scaffold, and by configuring the toe guard to be easily deployed and folded, the working tool can be safely placed on the working scaffold, so that the working efficiency is improved, It is easy to deploy and fold the toepad, and it can maintain a solid standing state, which can further increase work safety and work efficiency.

1 is a perspective view showing a deployed state of a ladder for work according to the present invention;
2 is a sectional view of "IV-IV" of FIG. 1;
Figure 3 is a perspective view showing a folded state of the ladder for work according to Figure 1;
Figure 4 is a "V-V" front sectional view of Figure 3,
5A and 5B are perspective views showing the folded state and the deployed state of the toe rest in FIG. 1, respectively;
6 is a perspective view showing another embodiment of the standing holding part for the toe rest in FIG. 1;
7 is a perspective view showing another embodiment of the standing holding part for the toe rest in FIG. 1;
8 is a perspective view showing another embodiment of the handrail in FIG. 1;
9 is a perspective view showing a ladder for work provided with an auxiliary work table in FIG. 1;
Figure 10 is a perspective view showing a ladder for work provided with a rotatable handrail in Figure 1.

Hereinafter, the folding work ladder according to the present invention will be described in detail based on an embodiment shown in the accompanying drawings.

The folding work ladder (hereinafter, abbreviated as work ladder) according to this embodiment can be carried on the user's shoulder and moved to the desired work position, and usually one user can stand up and perform work for a relatively short time. It can be made of materials that can withstand For example, the ladder for work according to this embodiment may be made of an aluminum alloy material or the like.

However, the ladder for work according to this embodiment is not necessarily limited to only a lightweight material. Under the condition that a separate moving means is provided, it may be made of a heavy material rather than an aluminum material. However, the following description will be focused on a personal ladder that is free to move. In addition, below, the longitudinal direction is defined as the longitudinal direction of the support, the width direction is defined as the width direction of the support, and the left and right directions are defined as the left and right directions of the step plate.

Figure 1 is a perspective view showing a deployed state of the ladder for work according to the present invention, Figure 2 is a "IV-IV" front sectional view of Figure 1, Figure 3 is a perspective view showing a folded state of the ladder for work according to Figure 1 , FIG. 4 is a "V-V" front cross-sectional view of FIG.

1 to 4, the working ladder 1 according to this embodiment, the support 10 having a predetermined length, the user (operator) stepping up and down the step 20, the worker rises to work It includes a working scaffold 30 to execute.

The support 10 is usually formed in a circular or square cross-section. However, in some cases, the support 10 may be formed in various cross-sectional shapes.

The support 10 may be formed as a single frame in the longitudinal direction. However, in some cases, each of two or more frames may be provided to slide so as to extend the length of the ladder. Since this is a common technique in the so-called A-type ladder, a detailed description thereof is replaced with Patent Document 1.

The support 10 is made of a pair of two frames each so that the two pairs of the supports 11 and 12 are rotatably coupled to each other. For example, two frames are arranged left and right to form a pair of first supports 11 , and two frames are arranged left and right on the opposite side to form a pair of second supports 12 .

Each of the first support 11 and the second support 12 is arranged in a trapezoidal shape in which two frames are arranged in parallel or expanded downward to form a pair of supports 11 and 12 .

The lower halves of the first support 11 and the second support 12 are spaced apart from each other while forming a leg portion to be described later, and the upper halves are hinged so as to be rotatably rotatable with each other while forming a railing portion to be described later. Support caps are respectively inserted into the lower ends of the first support 11 and the second support 12 to prevent slipping.

Handrails 112 and 122 are formed at the upper ends of the first support 11 and the second support 12 to ensure the safety of the operator who climbs on the work scaffold 30 . The handrails 112 and 122 to be described later may be integrally extended from the leg parts 111 and 121 to be described later to form a part of the first support 11 and the second support 12 . This will be explained again later.

The step plate 20 is coupled by crossing between both frames constituting the first support 11 and between both frames constituting the second support 12 , respectively. A step plate coupled to the first support 11 is defined as a first step plate 21 , and a step board coupled to the second support 12 is defined as a second step board 22 .

The first step board 21 and the second step board 22 are each made of a plurality of step boards disposed on each floor. That is, the first step plate 21 is arranged at a predetermined interval along the longitudinal direction from the lower side to the upper side along the longitudinal direction of the first support member 11 , and the second step board 22 is the second support member 12 . ) is arranged at a predetermined interval along the longitudinal direction from the lower side to the upper side along the longitudinal direction.

The first step board 21 and the second step board 22 may be respectively disposed at the same interval and at the same height, and may be disposed at different intervals and at different heights, respectively, if necessary. Of course, only one of the first step board 21 and the second step board 22 may be formed.

The first step board 21 and the second step board 22 may be detachably coupled by bolting or concave-convex coupling to the first support 11 and the second support 12, respectively, and fixedly coupled by welding, etc. could be Since this is a common technique in a personal ladder, a detailed description thereof is replaced with Patent Document 1.

The working scaffold 30 includes one scaffolding body 31 . The footrest body 31 is formed of an integral plate material without a seam in the middle. For example, the first lateral length of the scaffold body 31 according to the present embodiment is approximately equal to the interval between both frames constituting the respective supports 11 and 12, and is a direction orthogonal to the first lateral direction. The length in the second transverse direction is approximately equal to the spacing between the first support 11 and the second support 12 in the deployed state, that is, the deployed spacing, when the first support 11 and the second support 12 are deployed. is formed

Accordingly, the working scaffold 30 does not have a joint portion during deployment, and even if the operator steps on the working scaffold 30 , there is little risk of the working scaffold 30 being bent or collapsing, so safety can be secured.

One end of the working scaffold 30 may be formed with a scaffold hinge protrusion 31a extending in the transverse direction from both sides or a scaffold hinge groove (not shown) recessed in the transverse direction. In this case, on both inner surfaces of the first support 11 facing one end of the working scaffold 30, the scaffold hinge groove 11a to which the scaffold hinge protrusion 31a of the working scaffold 30 is hinged is formed or A footrest hinge protrusion (not shown) that is hingedly coupled to a footrest hinge groove (not shown) of the work footboard 30 may be formed. In this embodiment, the scaffold hinge protrusion 31a on the working scaffold 30 shows an example in which the scaffold hinge groove 11a is formed on the first support 11, respectively.

In this case, the inner diameter of the footrest hinge groove (11a) may be formed larger than the outer diameter of the footrest hinge protrusion (31a). For example, the footrest hinge groove (11a) is formed in a long elongated shape in the longitudinal direction of the first supporter (11), so that the footrest hinge protrusion (31a) is a predetermined length along the longitudinal direction of the first supporter (11). It can move up and down.

Accordingly, when the first support 11 and the second support 12 are folded, the scaffold storage protrusion 31b to be described later slides into the scaffold storage groove 11b to be described later while raising and lowering the working scaffold 30. As it is inserted, the work platform can be safely and securely stored.

The other end of the working scaffold 30 , that is, the other end of the scaffold main body 31 may be formed with a scaffold seating groove 31c recessed from the bottom surface. The scaffold seating groove 31c may be formed so that when the first support 11 and the second support 12 are deployed, the other end of the working scaffold 30 is inserted into the second step board 22 of the corresponding layer. there is.

For example, when the second step board 22 is formed in a rectangular cross-sectional shape, the footrest seating groove 31c may also be formed in a rectangular cross-sectional shape slightly larger than the cross-sectional area of the second step board 22 . However, since the working scaffold 30 must be inserted into the corresponding step plate 22 while rotating around the scaffold hinge protrusion 31a, the scaffold seating groove 31c is larger than the width of the step board 22 or outside. It may be formed to be curved.

Accordingly, when the scaffold seating groove 31c is extrapolated to the second step plate 22 in a state in which the first support 11 and the second support 12 are deployed, the scaffold seating groove 31c is the second step board ( 22) is supported in the longitudinal direction of the support and at the same time supported in the width direction. Then, the other end of the working scaffold 30 is seated on the second step plate 22 so that even if the operator climbs on the working scaffold 30, it is possible to stably support it.

At the same time, by the combination of the footrest hinge protrusion 31a provided at one end of the work footrest 30 and the footrest hinge groove 11a provided in the first support 11, the first support 11 is opened in one direction with respect to the opening direction. The second support 12 is spread to the other side by the combination of the second step plate 22 provided in the second support 12 and the footrest seating groove 31c provided at the other end of the working scaffold 30 . supported for direction. Then, the first support 11 and the second support 12 are spread apart by the second lateral length of the working scaffold 30 to maintain the deployed state.

In addition, at the other end of the working scaffold 30, that is, at the opposite end of the side where the scaffold hinge protrusion 31a is formed in the scaffold body 31, a scaffold storage protrusion 31b extending in the transverse direction from both sides is formed or the scaffold storage It may be a home (not shown). In this case, on both inner surfaces of the first support 11 facing the other end of the working scaffold 30, a scaffold receiving groove 11b for accommodating the scaffold receiving protrusion 31b of the working scaffold 30 is formed or working A footrest storage protrusion (not shown) accommodated in the footrest receiving groove (not shown) of the footrest 30 may be formed. In this embodiment, the scaffold storage protrusion 31b is formed on the working scaffold 30 , and the scaffold storage groove 11b is formed on the first support 11 , respectively.

In this case, the footrest receiving groove (11b) may be formed in a shape that can hang and support the footrest receiving protrusion (31b) in the width direction. For example, the footrest receiving groove (11b) may be formed in a 'L' shape to correspond to the length of the footrest hinge groove (11a). However, the scaffold receiving groove (11b) is sufficient if the shape of the scaffold receiving projection (31b) does not separate when the working scaffold 30 is accommodated.

Accordingly, when the first support 11 and the second support 12 are folded, the work platform 30 can be stably accommodated. That is, the operator lifts the working scaffold 30 in a state in which the scaffold hinge protrusion 31a of the working scaffold 30 is inserted into the scaffold hinge groove 11a of the first support 11 so that the scaffold storage protrusion 31b is Inserted to match the entrance of the footrest storage groove (11b), then the footrest hinge protrusion (31a) provided at one end of the work footboard 30 slides down along the footrest hinge groove (11a) to the bottom, and the work footrest ( The footrest storage protrusion 31b provided on the upper end of 30) is seated at the lower end of the footrest storage groove 11b while sliding down along the footrest storage groove 11b. Then, while the scaffold storage protrusion 31b is constrained in the width direction in the scaffold storage groove 11b, the working scaffold 30 is stably accommodated in the first support 11 .

Although not shown in the drawings, the footrest hinge groove may be formed in a circular shape. In this case, the inner diameter of the footrest hinge groove may be formed to be larger than the outer diameter of the footrest hinge protrusion, so that the above-described work footrest can be accommodated.

On the other hand, the upper edge of the working scaffold 30 may be provided with a plurality of toe pads 32 along the circumference. The toe guard 32 may be formed to protrude as much as a predetermined height on the upper surface of the working scaffold 30 .

5A and 5B are perspective views respectively showing the folded state and the deployed state of the toe rest in FIG. 1, and FIG. 6 is a perspective view showing another embodiment of the standing holding part for the toe rest in FIG. 1, FIG. 1 is a perspective view showing another embodiment of the standing holding part for the toe rest.

For example, the toe guard 32 may be formed to be fixed on the upper surface of the working scaffold 30 . However, in this case, when the operator stands on the working scaffold 30 in a state in which the working scaffold 30 is spread between the deployed first support 11 and the second support 12 , it is inconvenient or the toe is caught and safe Accidents may occur.

Accordingly, the toe guard 32 according to the present embodiment may be foldably coupled to the upper surface of the working scaffold 30 . For example, the toe cover 32 may be hinged to the footrest body 31 or coupled using a plurality of hinges 321 .

Accordingly, when not using a ladder, the toe guard 32 is folded on the upper surface of the working scaffold 30 and stored in the first support together with the scaffold body 31, and when using a ladder, together with the scaffold body 31 In the state mounted between the first support 11 and the second support 12, the toe guard 32 is erected in the footrest body 31 to prevent the work tools placed on the upper surface of the work footrest 30 from falling off. there is.

The toe mat 32 may be formed in various shapes. For example, the toe pads 32 are formed in four pieces along four sides of the footrest body 31 in the shape of a square plate, which is a hexahedron, and these four toe pads 32 are arranged so that both ends overlap each other when folded. can

Accordingly, when the toe curtains 32 are deployed, when the two toe curtains 32 folded inside are erected, the remaining two toe curtains 32 covered thereon are simultaneously erected. When the toe curtain 32 is folded, the reverse process may be performed. Through this, the deployment and folding of the toe curtain 32 can be easily performed.

In addition, the toe pad 32 according to the present embodiment may be maintained in a standing state by the standing holding unit 33 . The standing holding part 33 may be provided between the footrest body 31 and the toe curtain 32 , or may be provided between the toe curtain 32 .

For example, when the standing holding unit 33 is provided between the footrest body 31 and the toe curtain 32 , the standing holding unit 33 may be formed on all four sides of the footrest main body 31 . However, in some cases, the standing holding part 33 may be formed only on some of the four surfaces of the footrest body 31 . For example, the standing holding part 33 is formed only on two surfaces facing the first support 11 and the second support 12 , and the toe curtain 32 developed on the other two surfaces is the first support 11 ). It can be supported on the inner surface of both frames forming the and the inner surface of both frames forming the second support 12, respectively.

Here, the standing holding unit 33 may include a first standing holding unit 331 supporting the outside of the toe curtain 32 and a second standing holding unit 332 supporting the inside.

The first standing holding part 331 may protrude from the working scaffold to support and support the outer surface of the toe cover 32 , or may be bent and protruded from the toe cover 32 . For example, as shown in FIG. 5b , the first standing holding part 331 protrudes from the upper surface edge of the working scaffold 30 by a predetermined height or is bent outward from the lower end of the toe pad 32 as shown in FIG. 6 . may be formed as

Accordingly, the toe cover 32 is spread out and standing on the working scaffold 30 when deployed, and these toe pads 32 do not fall backward by the first standing holding part 331 supporting the outer surface and maintain a standing state. can keep

The second standing holding part 332 may be detachably provided on the upper surface of the working scaffold 30 . For example, as shown in FIG. 5B or FIG. 6 , the second standing holding part 332 may be formed of a pin member 332a that is detachably inserted into the pin groove 31d provided on the upper surface of the working scaffold 30 .

Accordingly, the pin member 332a is inserted and fixed into the pin groove 31d of the working footboard 30 in a state in which the toe curtain 32 is fully deployed. As the pin member 332a is disposed adjacent to the inner surface of the toe cover 32, it prevents the toe cover 32 from falling forward in the deployed state so that the standing state of the toe cover 32 is maintained.

In addition, as in FIG. 6, the standing holding part 33 may be formed of a clamp for maintaining a standing state by sandwiching the ends of both toe pads 32 orthogonal to each other. The standing holding part 33 according to the present embodiment may be coupled to only one corner among the four corners of the toe pads 32 .

As described above, only one edge of the toe pad 32 is fitted with the standing holding part 33 and fixed, and the other corners are not fixed with a separate standing holding part 33. Even if it is not fixed with a separate standing holding part 33, in the standing holding part 33 fitted in one corner. The toe mats 32 fixed by the chain support the other toe mats 32 adjacent to each other, so that all the toe mats 32 do not fall over. Accordingly, it is possible to easily maintain the standing state of the toepad 32 .

On the other hand, the ladder (1) for work according to this embodiment is provided with a handrail 50 for safely protecting the operator on the upper side of the work scaffold (30). The handrail 50 may be separately manufactured and detachably coupled to the upper side of the working scaffold 30 , or may be formed as a single unit on the working ladder ( 1 ). Hereinafter, a detachable structure is referred to as a detachable handrail, and a structure formed as a single unit is defined and described as an integrated handrail.

Referring back to FIGS. 1 and 2 , the integral handrail 50 may extend from a plurality of supports 11 and 12 . For example, the plurality of supports includes the first support 11 and the second support 12 as described above, and the first support 11 and the second support 12 are formed to correspond to each other.

In addition, the first support 11 is made of a pair of frames that are respectively disposed on both left and right sides with respect to the operator, and the second support 12 is, like the first support 11, both left and right with respect to the operator. It consists of two pairs of frames, each placed on the Each frame is also called an individual support, and the first step plate 21 described above is coupled layer by layer between both frames constituting the first support 11 , and between both frames constituting the second support 12 . The second step board 22 described above is coupled to each floor. In addition, the work scaffold 30 described above may be mounted to an approximately intermediate height of the first support 11 and an approximately intermediate height of the second support 12 . Accordingly, the handrail 50 may be formed using the upper half of the first support 11 and the upper half of the second support 12 .

Specifically, the first support 11 includes a first leg portion 111 , a first handrail portion 112 , and a first hinge portion 113 . When divided by use, the first leg portion 111 forms a ladder, and the first handrail portion 112 and the first hinge portion 113 form the handrail 50 .

The first leg portion 111 forms a lower half of the first supporter 11 and is formed in pairs by two frames having a predetermined length. That is, as described above, the first leg portions 111 may be disposed in parallel with each of the legs provided on both left and right frames, or may be formed in a trapezoidal shape extending downward.

In addition, the first leg portion 111 may be formed of a single frame in the longitudinal direction, or a plurality of frames may be slidably coupled to enable length extension. When a plurality of frames are slidably coupled, a conventional height adjusting device (unsigned) may be provided.

The first handrail portion 112 may extend integrally from each of the first leg portions 111 in the longitudinal direction. However, since the first leg part 111 is inclined in the direction toward the second leg part 121 to be described later toward the upper side when deployed to form an A-shaped ladder shape, the first handrail part 112 is the first leg part ( 111) may be formed by bending upward.

Accordingly, the first handrail part 112 has a distance between the first handrails (second direction spacing) and a second handrail part 122 to be described later (first direction spacing), respectively. can be secured approximately equal to the transverse length of Through this, the first handrail 112 can be wrapped around the upper side of the working scaffold 30 in all directions together with the second handrail 122 to be described later.

In addition, the first handrail 112 includes a longitudinal handrail extending in the longitudinal direction from the first leg portion 111 (a right-side handrail in the drawing) 112a, and a longitudinal handrail 112a. It may be made of a transverse handrail (a right transverse handrail with reference to the drawing) 112b that extends in the width direction and connects to each other in all directions between the longitudinal handrails 112a.

The longitudinal handrail 112a is bent by a predetermined angle with respect to the first leg 111 as described above, and the transverse handrail 112b is substantially orthogonal to the longitudinal handrail 112a. formed in the direction Accordingly, the first handrail portion 112 and the second handrail portion 122 to be described later forming the handrail 50 surround the operator from the upper side by the height of the longitudinal handrail portion 112a around the work scaffold 30. It creates an arbitrary space.

The height of the longitudinal handrail 112a may be formed to extend approximately to the waist position of the operator. Accordingly, the lateral handrail portion (112b) can be formed at the waist position of the worker can stably support the waist during operation.

On the other hand, the footrest hinge groove (11a) and the footrest accommodating groove (11b) are respectively formed in the longitudinal handrail portion (112a).

Specifically, the footrest hinge groove 11a may be formed on the inner surface of the portion where the first leg portion 111 and the longitudinal handrail portion 112 are connected, respectively. As described above, the footrest hinge groove 11a may be formed in a long elongated groove shape in the longitudinal direction, or may be formed in a circular groove shape to have an inner diameter greater than the outer diameter of the footrest hinge protrusion 31a.

The footrest receiving grooves 11b may be respectively formed on both inner surfaces of the first leg portion 111 above the footrest hinge grooves 11a. As described above, the footrest receiving groove 11b may be formed in a "L"-shaped cross-sectional shape by opening the side facing the second support 12 .

The lateral handrail 112b may include a first lateral handrail (right first lateral handrail) 112b1 and a second lateral handrail (right second lateral handrail) 112b2. .

The first lateral handrail portion 112b1 may be integrally formed to extend from the longitudinal handrail portion 112a toward the first lateral handrail portion 122b1 of the second handrail 122 to be described later. The first lateral handrail portion 112b1 may be bent at a substantially right angle from the longitudinal handrail portion 112a, but may be formed to be slightly inclined in consideration of stress.

The portion in which the first lateral handrail portion 112b1 extends from the longitudinal handrail portion 112a, that is, the portion where the first transverse handrail portion 112b1 and the longitudinal handrail portion 112a are connected, is a first width reducing portion ( 114) may be further formed. For example, when the ladder 1 for work according to this embodiment is folded around a support hinge (unsigned) consisting of a first hinge part 113 and a second hinge part 123 to be described later, FIGS. 3 and FIG. As shown in 4, the outer surface of the portion where the first lateral handrail portion (112b1) and the longitudinal handrail portion (112a) are connected becomes a portion forming the maximum width. This is because the first transverse handrail portion (112b1) is formed by bending in a direction substantially perpendicular to the longitudinal handrail portion (112a).

Due to this, the part forming the maximum width may be caught while the operator carries the folded ladder on his shoulder and passes through a narrow space. However, if the width reducing portion 114, 124 is formed by bending or cutting the portion constituting the maximum width as in this embodiment, it is possible to reduce the maximum width that occurs when folding the ladder 1 for work.

In addition, the portion where the first lateral handrail portion (112b1) is connected to the longitudinal handrail portion (112a) is a portion where stress is concentrated. A first bending reinforcing portion 115 may be formed on the inner surface of the portion where the first lateral handrail portion 112b1 is connected to the longitudinal handrail portion 112a. The first bending reinforcing portion 115 may be formed to become wider from the longitudinal handrail portion 112a toward the first transverse handrail portion 112b1.

Accordingly, even if the portion at which the longitudinal handrail portion 112a and the first transverse handrail portion 112b1 are connected is substantially orthogonal, it is possible to suppress damage due to stress in this portion. In addition, the working ladder (1) according to this embodiment may be used as a bridge connecting the space between both sides of the first support 11 and the second support 12 after fully unfolding by approximately 180 °. Even in this case, the bending reinforcement parts 115 and 125 are firmly supported between the longitudinal handrails 112a or the first transverse handrails 112b1 to suppress the bending and collapsing of the working ladder 1 there is. In this case, as the first transverse handrail portion 112b1 according to the present embodiment is formed to be relatively long, the first support 11 and the second support 12 including the longitudinal handrail 112a can be stably supported. there is.

The second lateral handrail portion 112b2 connects between inner surfaces of the first lateral handrail portion 112b1 facing each other. Accordingly, the second lateral handrail portion 112b2 of the first support 11 forms a “C” shape in plan view together with the first lateral handrail portion 112b1 orthogonal thereto.

The second lateral handrail portion 112b2 may be integrally and firmly coupled by being bolted or welded at the upper end of the longitudinal handrail portion 112a. Accordingly, even if the worker leans on the transverse handrail part 112b during work, there is no fear that the transverse handrail part 112b will collapse or be removed, thereby ensuring the safety of the worker, thereby increasing the psychological stability of the worker. It can increase work efficiency.

However, as in FIG. 8 , one end of the second lateral balustrade part 112b2 faces the first lateral balustrade part 112b1 or the longitudinal balustrade part (the right longitudinal balustrade part based on the drawing) 112a ) is rotatably coupled using a hinge or a hinge, and the other end is provided in the first transverse handrail part (112b1) or the longitudinal handrail part (112a) on the other side facing it (the first transverse in the drawing). It may be fixed with bolts or pins in a state of being seated on the directional handrail) 11c. Through this, when the operator enters the inside of the handrail 50, the operator lifts the second transverse handrail part 112b2 and then lowers it after entering and fixing the handrail through the second side handrail part 112b2 on the right side. It can be easily entered into the inside of (50).

The second lateral handrail portion (112b2) may be formed only at the upper end of the longitudinal handrail portion (112a) as shown in FIGS. 1 to 4, and although not shown in the drawings, in addition to the middle of the longitudinal handrail portion (112a) can be formed. In this case, the second lateral handrail portion (112b2) may be utilized as a kind of step plate when a removable handrail to be described later is applied. This will be explained later with a removable railing.

The first hinge portion 113 is formed at the end of the first lateral handrail portion (112b1). The first hinge part 113 is coupled to a second hinge part 123 to be described later to form a hinge part that enables the first support 11 and the second support 12 to unfold or fold while relatively rotating. This hinge part is defined by the support hinge, and the support hinge is a widely known technique in the A-type ladder, so a detailed description thereof will be omitted.

However, the first hinge portion 113 and the second hinge portion 123 according to the present embodiment may be excluded from the unfolding maintenance function or the fixing function for each angle, unlike the hinge portion known in the conventional A-type ladder. This is because it maintains the unfolded state of both supports 11 and 12 by supporting the width direction using the work scaffold and the support (step board) described above, so the hinge part (support hinge) 113, 123 has a unfolding maintenance function. Or even if the fixing function by angle is excluded, there is no problem in use. Accordingly, the manufacturing cost of the hinge part can be reduced.

On the other hand, the second support 12 is formed symmetrically with the first support 11 around the first hinge portion 113 and the second hinge portion 123 constituting the support hinge. For example, the second support 12 includes a second leg portion 121 , a second handrail portion 122 , and a second hinge portion 123 .

When divided by use, the second leg part 121 forms a ladder together with the first leg part 111 , and the second handrail part 122 and the second hinge part 123 are the first handrail part 112 and the second handrail part 112 . 1 forms a handrail 50 together with the hinge part 113 .

These, the second leg portion 121 is the first leg portion, the second handrail portion 122 is the first handrail portion 112 , and the second hinge portion 123 is attached to the first hinge portion 113 , respectively. Therefore, a detailed description thereof is replaced with the description of the first support 11 described above.

However, the footrest hinge groove 11a and the footrest receiving groove 11b described above are respectively formed in the first leg portion 111 of the first supporter 11 , but the second leg portion 121 of the second supporter 12 . ) differs in that these grooves are not formed.

In addition, a second transverse handrail (left second transverse handrail portion 122b2 based on the drawing) constituting the transverse handrail portion (left side handrail portion based on the drawing) 122b of the second support 12 is formed in a "reverse U" shape on the plane together with the first transverse handrail (left first transverse handrail with reference to the drawing) 122b1 orthogonal thereto, which is the first when the handrail 50 is deployed. Together with the first lateral balustrade part 112b1 and the second lateral balustrade part 112b2 of the support 11, the balustrade 50 is closed in a "ㅁ" shape on a plan view.

In this case, as in FIG. 8 , one end of the second lateral balustrade 122b2 is opposite the first lateral balustrade part 122b1 or the longitudinal balustrade (left longitudinal balustrade with reference to the drawing) It is rotatably coupled to (122a) using a hinge or a hinge, and the other end is in the handrail seating groove (12c) provided in the first transverse handrail part (122b1) or the longitudinal handrail part (122a) on the other side facing it. It may be fixed with bolts or pins in the seated state. Through this, the operator can easily enter the inside of the handrail 50 even through the second lateral handrail part 122b2 on the left side.

In the drawings, unexplained reference numeral 124 denotes a second width reduction part, and 125 denotes a second bending reinforcement part.

The ladder for work according to this embodiment as described above has the following operational effects.

That is, when the operator deploys the ladder, the first support 11 and the second support 12 are spread apart. At this time, the first support 11 and the second support 12 are opened in both directions about the first hinge part 113 and the second hinge part 123 constituting the support hinge.

Next, the operator separates the work platform 30 from the first support 11 and mounts it on the corresponding step plate 22 coupled to the second support 12 . At this time, the working scaffold 30 is slightly lifted and the scaffold storage protrusion 31b provided on the other end side of the scaffold body 31 falls out of the receiving end of the scaffold storage groove 11b provided in the first support 11 . At the same time, the footrest hinge protrusion 31a provided on one side of the footrest body 31 and the footrest hinge groove 11a provided on the first support 11 are rotated as a center. Then, the step plate 22 coupled to the second support 12 is inserted into the scaffold seating groove 31c provided on the lower surface of the other end of the scaffold main body 31 . Accordingly, the first support 11 and the second support 12 are maintained in a deployed state, and the upper side of the working scaffold 30 is a handrail extending integrally from the first support 11 and the second support 12 . (50) is formed as described above.

Next, the operator lifts the toe pad 32 folded on the upper surface of the footrest body 31 and fixes it in a rectangular box shape. At this time, as the toe curtains 32 in the folded state are arranged so that both ends overlap each other, when the toe curtains 32 are deployed, when the two lower ones are lifted, the other toe curtains 32 are placed on the bottom It is pulled together by the toe curtain (32). Then, the operator supports the standing holding part 33 as described above or assembling it so that the erect toe pad 32 maintains the standing state. The standing operation of the toe pad 32 may be performed while the operator is standing on the working scaffold 30 .

Next, the operator steps on the step plates 21 and 22 and climbs on the upper surface of the work platform 30 to perform the desired work. At this time, the operator can move to the working scaffold 30 while holding the longitudinal handrails 112a and 122a constituting a part of the handrail 50, and the second transverse handrails (112b2) (122b2) and the working scaffold. It is possible to enter the interior of the handrail 50 through the space between (30).

Conversely, when the work is finished and the ladder is moved to another work position or stored and organized, the work ladder can be folded in reverse to the unfolding sequence described above.

As described above, the ladder 1 for work according to this embodiment is formed in a structure in which the handrail 50 wraps around the perimeter from the upper side of the working scaffold 30, the worker who climbs the working scaffold 30 is The entire front, rear, left and right are protected by the handrail 50 . Accordingly, the safety of the worker working on the work ladder can be secured, and through this, the worker has a psychological stability, so that the work efficiency can be improved as much.

In addition, the working ladder (1) according to this embodiment, the working scaffold 30 is made of a single member and as the both ends are firmly fixed, the risk of collapsing the working scaffold 30 when using the working ladder 1 spread out can be effectively suppressed. In addition, it is possible to prevent the working scaffold 30 from coming out of the support during storage or movement by hanging and fixing the working scaffold 30 when folded or moved for storage or movement of the working ladder (1). Through this, it is possible to prevent in advance a safety accident that occurs when the work platform is detached during storage or movement.

In addition, the working ladder 1 according to this embodiment is provided with a toe pad 32 on the edge of the working scaffold 30, and by configuring the toe pad 32 to be easily deployed and folded, the working scaffold 30 ) can be safely placed on a work tool such as a hammer, which not only improves work efficiency, but also facilitates deployment and folding of the toepad 32, and can maintain an upright state, further improving work safety and work efficiency. can be raised

On the other hand, if there is another embodiment for the ladder for work as follows.

That is, in the above-described embodiment, the working scaffold and the handrail are provided within the length range of the support, but in some cases, the working scaffold and the handrail are separately provided and may be detachably coupled to the upper end of the working ladder.

9 is a perspective view showing a ladder for work provided with an auxiliary work table in FIG. 1 .

Referring to Figure 9, the working ladder (1) according to this embodiment further includes an auxiliary workbench 510 that is detachably provided on the upper end of the support 10 forming a part of the ladder portion. Since the support 10, the step board 20, the working scaffold 30, etc. forming the ladder are the same as the examples disclosed in the working ladder of the above-described embodiments, it is replaced with a description of the above-described embodiment.

However, the upper end of the support 10, precisely the first lateral handrail portion 112b1 of the first support 11 and the upper surface of the first lateral handrail portion 122b1 of the second support 12, is a workbench to be described later. A workbench attachment/detachment groove (or workbench attachment/detachment protrusion) 510b may be formed so that the detachable protrusion 510a is inserted, respectively.

The work bench removal groove 510b may be formed within a range in which the longitudinal handrail 112a of the first support 11 or the longitudinal handrail 122a of the second support 12 is formed. Accordingly, the removable handrail 510 can be stably supported.

The auxiliary workbench 510 according to the present embodiment forms a kind of detachable handrail workbench, and may include an auxiliary workbench 511 and an auxiliary handrail 515 .

The auxiliary working scaffold 511 is formed in approximately the same shape as the working scaffold 30 constituting a part of the ladder. However, since the auxiliary working scaffold 511 is formed slightly smaller than the width of the working scaffold 30 at the upper end of the ladder, the auxiliary working scaffold 511 may also be formed smaller than the working scaffold 30 .

An auxiliary toe curtain 512 may be formed on the edge of the auxiliary working scaffold 511 . Auxiliary toe mat 512 may be formed in approximately the same manner as the toe curtain 32 of the above-described working foot plate 30 . For this, the description of the toe pad 32 of the working scaffold 30 is replaced.

The auxiliary handrail 515 may include a longitudinal auxiliary handrail portion 516 and a lateral auxiliary handrail portion 517 .

The longitudinal auxiliary handrails 516 extend in the longitudinal direction from the corners of the auxiliary working scaffolding 511, respectively. For example, the longitudinal auxiliary handrail 516 may consist of four frames.

The longitudinal auxiliary handrail 516 may be coupled by welding on the upper surface of the edge of the auxiliary working scaffold 511, or may be coupled by bolting or welding to the side of the edge of the auxiliary working scaffold 511.

The transverse auxiliary railing 517 connects the sides of the four longitudinal auxiliary railings 516 to each other. The transverse auxiliary handrail 517 may be formed of, for example, four frames to correspond to the number of the longitudinal auxiliary handrails 516 .

The transverse auxiliary railing 517 is preferably connected between each of the longitudinal auxiliary railings 516 on the upper side of the longitudinal auxiliary railing 516 so that the height of the handrail can be secured to the maximum.

Meanwhile, on the lower surface of the auxiliary workbench 510, a workbench attachment/detachment protrusion 510a may be formed to protrude downward. The work bench detachment protrusion 510a may be formed to correspond to the work bench detachment groove 510b provided at the upper end of the support 10 constituting the ladder, respectively.

For example, the workbench detachment protrusion 510a may be formed extending from the lower end of the longitudinal auxiliary handrail 516 toward the workbench detachment groove 510b. In this case, the workbench attachment and detachment protrusion 510a may be formed for each of the longitudinal auxiliary handrails 516 . Accordingly, the removable handrail 510 can be more stably supported on the support 10 forming the ladder.

In addition, the work bench attachment and detachment protrusion 510a may be formed to protrude downward from the lower surface edge of the auxiliary work platform 511 toward the work bench detachment groove 510b. Even in this case, the removable handrail 510 can be more stably supported on the ladder (1) for work.

Although not shown in the drawings, the auxiliary work scaffold 511 and the auxiliary handrail 515 constituting the auxiliary work table 510 may be formed to be folded. In this case, the operator can easily attach and detach the auxiliary work table 510 to the upper end of the support 10 forming the ladder.

As described above, the auxiliary workbench 510 according to the present embodiment can be used on the upper end of the supporter 10 as necessary to perform a necessary operation at a higher position than the above-described work footrest 30 .

For example, as the auxiliary workbench 510 is placed on the upper end of the supporter 10 in a state in which the working ladder 1 is deployed, the upper end of the supporter 10 forms a substantial workfoot. At this time, by inserting the work bench attachment/detachment protrusion 510a provided at the lower end of the auxiliary work table 510 into the work bench detachment groove 510b provided at the upper end of the support 10 constituting the ladder to increase the degree of coupling of the auxiliary work table 510 can Through this, even when the operator climbs on the auxiliary work platform 511 of the auxiliary work table 510, it is possible to perform the work stably.

In this case, the intermediate transverse handrail portion (122b2) serving as a step plate on the handrail of the working ladder (1) may be further installed in the middle of the longitudinal handrail portion (122a). The operator can step on the intermediate transverse handrail (122b2) and climb to the auxiliary working platform (511). However, it is preferable that the intermediate transverse handrail portion (122b2) be installed only on the second support 12 side in consideration of the storage of the working scaffold (30).

On the other hand, if there is another embodiment for the ladder for work as follows.

That is, in the above-described embodiments, the handrail extends integrally to the support or auxiliary workbench, or is bolted or welded to be fixed, but in some cases, the handrail may be hinged so as to be rotatable in the middle of the supporter.

10 is a perspective view showing a ladder for work provided with a rotary handrail in FIG. 1 .

Referring to Figure 10, the work ladder 1 according to this embodiment, the first support 11 and the second support 12, the first support 11 and the second support 12 constituting a plurality of supports (12) A plurality of step plates 20 arranged at a predetermined interval along the longitudinal direction, respectively, the first support 11 and the second support 12 are deployed and mounted or folded and accommodated in the working platform 30. , may include a hinge-type handrail 520 provided on the first support 11 and the second support 12, respectively.

Since the basic configuration and operation of the plurality of supports 11 and 12, the plurality of step boards 20, and the working scaffold 30 are approximately the same as in the above-described embodiment, for this, instead of a description of the above-described embodiments do.

However, in this embodiment, the first support 11 and the second support 12 are formed in a straight line, respectively, and mutually by a support hinge 13 at the upper end of the first support 11 and the second support 12 . It can be combined in the form of a rotatable A-shaped ladder. And a first handrail 521 constituting a part of the hinge-type handrail 520 is rotatably coupled to the first support 11 by a first handrail hinge 531, and the second support 12 has a hinge-type handrail The second handrail 522 constituting the remainder of the 520 may be rotatably coupled by the second handrail hinge 532 .

The first handrail 521 is formed in a “c” shape and is hinged to the first support 11 , and the second handrail 522 has a shape symmetrical to the first handrail 521 , that is, a “reverse C” shape. It is formed in a shape and may be hinged to the second support 12 .

Specifically, the first handrail 521 and the second handrail 522 are hinged on the upper ends of the first support 11 and the second support 12 , that is, the portions forming the longitudinal handrails 112a and 122a, respectively. can be combined. Accordingly, when the first handrail 521 and the second handrail 522 are deployed, a hinge-type handrail 520 forming a “ㅁ” shape is formed to surround the upper side of the working scaffold 30 in all directions.

Here, the first handrail 521 and the second handrail 522 may be arranged to rotate in a direction overlapping the first support 11 and the second support 12, respectively, when folded, and the first support 11 and It may be arranged to rotate in a direction extending from the second support 12 . 9 shows an example in which the first handrail 521 and the second handrail 522 are rotated in directions extending from the first support 11 and the second support 12, respectively.

In addition, the first handrail 521 and the second handrail 522 may be provided with a handrail holding part 523 to maintain the deployed state, that is, the horizontally unfolded state, when deployed. The handrail holding unit 523 may be formed on at least one of the first handrail 521 and the corresponding first support 11, the second handrail 522 and the corresponding second support 12, respectively. . 9 shows an example in which projections constituting an example of the handrail holding part 523 are respectively formed on the first handrail 521 and the second handrail 522 .

Ladder for work (1) according to the present embodiment, when the operator works by standing on the working scaffold, the first handrail 521 and the second handrail 522 are spread out to cover the upper side of the working scaffold 30 in all directions. is formed, and when moving or storing, the first handrail 521 and the second handrail 522 can be folded and accommodated together with the first supporter 11 and the second supporter 12 .

As described above, the working ladder 1 according to this embodiment has a first handrail 521 and a second handrail 522 forming a handrail, as in the above-described embodiments, a first support 11 and a second support ( 12), respectively, to increase the bonding strength of the handrail, and at the same time to form a “ㅁ” shape that surrounds the operator in all directions when the first handrail and the second handrail are deployed, thereby further enhancing safety.

In addition, the work ladder (1) according to this embodiment can greatly reduce the width of the ladder when folded. That is, in the ladder 1 for work according to this embodiment, the first support 11 and the second support 12 are formed in a straight line, and the first handrail 521 and the second handrail 522 forming the handrail are second The first support 11 and the second support 12 are respectively hinged.

Accordingly, it is possible to greatly reduce the width of the handrail including the supports 11 and 12 when folded. Then, when the operator carries the ladder on the shoulder and passes through the door frame or other narrow space, the ladder can be prevented from being caught on the door frame or the surface of the narrow space in advance, thereby further reducing the risk of safety accidents.

1: work ladder 10: support
11: first support 11a: footrest hinge groove
11b: footrest storage groove 111: first leg portion
112: first handrail 112a: longitudinal handrail
112b: transverse handrail 112b1: first transverse handrail
112b2: second lateral handrail 113: first hinge portion
114: first width reduction part 115: first bending reinforcement part
12: second support 121: second leg portion
122: second handrail 122a: longitudinal handrail
122b: transverse handrail 122b1: first transverse handrail
122b2: second lateral handrail 123: second hinge portion
124: second width reduction part 125: second bending reinforcement part
20: step board 21: first step board
22: second step board 30: work platform
31: footrest body 31a: footrest hinge projection
31b: footrest storage projection 31c: footrest seating groove
31d: pin groove 32: toe cap
321: hinge 33: standing holding part
331: first standing holding part 332: second standing holding part
332a: pin member 50: handrail
510: auxiliary workbench 510a: workbench detachable projection
510b: work bench removal groove 511: auxiliary work platform
512: auxiliary toe curtain 515: auxiliary handrail
516: longitudinal auxiliary handrail 517: transverse auxiliary handrail
520: hinge-type handrail 521: first handrail
522: second handrail 523: handrail maintenance part
531: first handrail hinge 532: second handrail hinge

Claims (11)

a plurality of supports;
a plurality of stair plates provided for each floor on the plurality of supports; and
Including a working platform coupled between the plurality of supports on the upper side of the step plate,
The plurality of supports,
a plurality of leg units in pairs of two each having a predetermined length;
a handrail extending integrally along the longitudinal direction from the plurality of leg parts to surround the upper side of the working scaffold in all directions; and
It is provided on the handrail and includes a hinge part that is rotatably coupled so that the plurality of supports are deployed or folded,
the handrail,
a longitudinal balustrade unit extending from the leg unit along the longitudinal direction;
a first transverse handrail bent from an end of the longitudinal handrail portion toward the longitudinal handrail facing each other and extended as a single unit along the width direction; and
It is made of a second transverse handrail that connects the sides of the first transverse handrail facing each other and surrounds all sides together with the first transverse handrail,
The hinge part,
Ladder for folding work provided to connect each end of the first transverse handrail facing each other from both sides. According to claim 1,
The outer surface of the bent portion extending from the first transverse handrail portion extending from the longitudinal handrail is a folding ladder for work that is bent or inclined in a narrowing direction in an upward direction. According to claim 1,
Folding work ladder further provided with a bending reinforcement for connecting between the longitudinal handrail and the first transverse handrail on the inner surface of the bent portion of the longitudinal handrail and the first transverse handrail. According to claim 1,
The outer surface of the bent portion extending from the first transverse handrail portion extending from the longitudinal handrail portion is bent or inclined in the upwardly narrowing direction, the width reduction portion is formed,
The inner surface of the bent portion is a folding work ladder that is formed with a bending reinforcement that connects between the longitudinal handrail and the first transverse handrail. 5. The method according to any one of claims 1 to 4,
One end of the work scaffold is hinged to one support among the plurality of supports,
The other end of the work scaffold is inserted into the step plate provided on the other support of the plurality of supports during deployment, and a folding work ladder in which a footrest seating groove is formed to be supported in the longitudinal and width directions. a plurality of supports;
a plurality of stair plates provided for each floor on the plurality of supports; and
Including a working platform coupled between the plurality of supports on the upper side of the step plate,
The plurality of supports,
a plurality of leg units in pairs of two each having a predetermined length;
a handrail extending integrally along the longitudinal direction from the plurality of leg parts to surround the upper side of the working scaffold in all directions; and
It is provided on the handrail and includes a hinge part that is rotatably coupled so that the plurality of supports are deployed or folded,
One end of the working scaffold is hinge-coupled to one support among the plurality of supports, and the other end of the working scaffold is inserted into the step plate provided on the other support among the plurality of supports when deployed to be supported in the longitudinal and width directions. A footrest seating groove is formed,
A scaffold storage projection is formed on the side of the working scaffold, and a part of the handrail has a scaffold storage groove for accommodating the scaffold storage projection of the working scaffold when the working scaffold is folded. a plurality of supports;
a plurality of step plates provided for each floor on the plurality of supports; and
Including a working platform coupled between the plurality of supports on the upper side of the step plate,
The plurality of supports,
a plurality of leg units in pairs of two each having a predetermined length;
a handrail extending integrally along the longitudinal direction from the plurality of leg parts to surround the upper side of the working scaffold in all directions; and
It is provided on the handrail and includes a hinge part that is rotatably coupled so that the plurality of supports are deployed or folded,
One end of the working scaffold is hinge-coupled to one support among the plurality of supports, and the other end of the working scaffold is inserted into the step plate provided on the other support among the plurality of supports when deployed to be supported in the longitudinal and width directions. A footrest seating groove is formed,
A plurality of toe pads are foldably coupled along the circumference to the upper edge of the working scaffold,
When the plurality of toe mats are folded, the foldable work ladder is arranged so that the ends of each toe cover overlap each other. 8. The method of claim 7,
A foldable work ladder further provided with a standing holding part that maintains a standing state when the toes are deployed between the working scaffold and the toes or between the toes. According to any one of claims 1 to 4, 6 to 8,
The upper end of the support is further provided with an auxiliary workbench that is detachably coupled to the support,
The auxiliary workbench,
Auxiliary work footrest that is detachably seated on the upper surface of the support; and
A plurality of longitudinal side auxiliary handrails extending in the longitudinal direction from the edge of the auxiliary working scaffold, and an auxiliary handrail composed of a transverse auxiliary handrail that connects and wraps between the plurality of longitudinal side auxiliary handrails in all directions. Folding work ladder. a plurality of supports;
a plurality of stair plates provided for each floor on the plurality of supports; and
Including a working platform coupled between the plurality of supports on the upper side of the step plate,
The plurality of supports,
a plurality of leg portions having a predetermined length and being rotatably coupled to each other at the upper end;
A plurality of handrails that are hinged rotatably from each of the plurality of leg parts to surround the upper side of the working scaffold in all directions when deployed; and
and a handrail holding part provided between the plurality of leg parts and the plurality of handrails, respectively, to maintain a state in which the plurality of handrails are deployed,
One end of the working scaffold is hinge-coupled to one support among the plurality of supports, and the other end of the working scaffold is inserted into the step plate provided on the other support among the plurality of supports when deployed to be supported in the longitudinal and width directions. A footrest seating groove is formed,
A scaffold storage projection is formed on the side of the working scaffold, and a part of the handrail has a scaffold storage groove for accommodating the scaffold storage projection of the working scaffold when the working scaffold is folded. a plurality of supports;
a plurality of stair plates provided for each floor on the plurality of supports; and
Including a working platform coupled between the plurality of supports on the upper side of the step plate,
The plurality of supports,
a plurality of leg portions having a predetermined length and being rotatably coupled to each other at the upper end;
A plurality of handrails that are hinged rotatably from each of the plurality of leg parts to surround the upper side of the working scaffold in all directions when deployed; and
and a handrail holding part provided between the plurality of leg parts and the plurality of handrails, respectively, to maintain a state in which the plurality of handrails are deployed,
One end of the working scaffold is hinge-coupled to one support among the plurality of supports, and the other end of the working scaffold is inserted into the step plate provided on the other support among the plurality of supports when deployed to be supported in the longitudinal and width directions. A footrest seating groove is formed,
A plurality of toe guards are foldably coupled along the circumference to the upper edge of the working scaffold, and the plurality of toe guards are foldable work ladders arranged so that the ends of each toe pad overlap each other when folded.

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