KR200494805Y1 - Function ladder - Google Patents

Abstract

A working step ladder is disclosed. Working step ladder according to an embodiment of the present invention, a plurality of stair frames; And it is horizontally arranged on the upper end of the stair frame, it includes a foldable work scaffold provided to be foldable from one side.

Description

work step ladder {Function ladder}

The present invention relates to a work scaffolding ladder, and more specifically, unlike the prior art, since the working scaffold area can be effectively folded, it is possible to reduce the space for storage as well as to carry it comfortably, in particular, the folding operation even by the operator alone It is about a work step ladder that can proceed safely.

A ladder is a generic term for a device that can be stepped on when going up and down a high or low place. There are many different types of ladders because they are made to fit the intended use. Let's take a brief look at this.

First of all, a typical ladder that is commonly encountered in the vicinity is a folding ladder. It is also called an A-shaped ladder because it can be folded in the shape of an English letter A.

Whereas a general ladder takes up a lot of volume when stored, such a folding ladder can be folded and stored, so storage convenience can be increased.

Next, there is a walking step work ladder and an orchard ladder.

Walking Step The work ladder is used to step up and down stairs to a high place in a factory or a large warehouse.

Working step ladders are in the form of steps that go up and down, so it is mainly to have a height of less than 1m. However, in shipping companies, etc., there is a lot of work at heights of 2~3m, so a walking step ladder with a large size to climb up to a height of about 3m is sometimes used.

The orchard ladder is commonly used in orchards, and it is made so that it is not inconvenient for picking or pruning fruits while standing high as well as being able to climb as high as a tree.

In particular, a frame for preventing a worker from falling is installed at the upper end of the orchard ladder.

On the other hand, in addition to this, there are a straight ladder, a rope ladder, a cow-type work ladder, and the like. Uma-type work ladders are sometimes simply called work ladders.

These work ladders are very useful for working at high places, that is, at heights, because the work scaffold is formed. Therefore, it is very useful when working while moving or moving a certain distance, for example, painting or painting, rather than working in one place without moving.

In addition, work ladders are widely used because of their simple structure and low manufacturing cost compared to walking step work ladders and fruit tree ladders.

However, the existing conventional working scaffolding ladder is a fixed type that the working scaffold is not folded, so it has no choice but to occupy a lot of space during storage, and also has a problem of inconvenient handling due to its large volume when transported.

In particular, when folding the existing conventional work step ladder, it is necessary to fold the footrest down in an inverted state and then fold the legs, so the folding work may be inconvenient and the work is not safe, and if the ladder is large, it is difficult to work alone Considering all of these, there is a need for technological development to solve this problem.

Korean Intellectual Property Office Application No. 20-2007-0003644

Therefore, the technical problem to be achieved by the present invention is that, unlike the prior art, the working scaffold area can be effectively folded, so that the space for storage can be reduced, and it can be conveniently transported. to provide a ladder.

According to one aspect of the present invention, a plurality of stair frames; And disposed horizontally at the upper end of the stair frame, a working scaffold ladder comprising a foldable working scaffold that is provided to be foldable from one side may be provided.

The foldable working scaffold includes: a pair of unit scaffolds arranged to be mutually foldable; a side hinge part coupled to an end of the unit scaffold but provided in a shape surrounding the connection support bar, and guiding a side to rotate freely when the pair of unit scaffolds are folded; and a center hinge part disposed between the pair of unit scaffolds and connected to the pair of unit scaffolds at the corresponding position, and guiding the center to freely rotate when the pair of unit scaffolds are folded. In addition, the center of the pair of unit footrests can be folded upward by the action of the side hinge part and the center hinge part.

The foldable work scaffold may further include a plurality of link members having both ends freely rotatably coupled to the unit scaffold and the stair frame, but arranged to be alternately arranged under the pair of unit scaffolds.

a movable locker movably coupled to the main stair frame and having a locking pin insertable into a communication hole communicating with the main stair frame and the sub stair frame; and a locker elastic support portion resiliently supporting the movable locker in a direction in which the locking pin portion is inserted into the communication hole, wherein the step frame includes a main step frame in which a foot supported on the ground is coupled to a lower end thereof; It may be a height-adjustable stair frame provided with a sub stair frame connected to be movable relative to the main stair frame so that the overall height can be adjusted by the operation of the sub stair frame.

It may further include a guide railing unit connected to the stair frame or the foldable work scaffold, and used as a handle when climbing to the foldable work scaffold through the stair frame.

According to the present invention, unlike the prior art, since the area of the working scaffold can be effectively folded, it is possible to reduce the space for storage and to carry it comfortably, and in particular, even the operator alone can safely proceed with the folding operation.

1 is a perspective view of a working step ladder according to an embodiment of the present invention.
FIG. 2 is a plan view of FIG. 1 ;
FIG. 3 is a front view of FIG. 1 ;
4 is a view of a state in which the working scaffold is raised in FIG. 3 .
FIG. 5 is a view of a state in which the working scaffold is folded in FIG. 3 .
6 is an enlarged perspective view of the main part of the height-adjustable stair frame area.
FIG. 7 is an enlarged view of area A of FIG. 6 .
8 and 9 are views showing the operation of the sub-stair frame of the height-adjustable stair frame.
10 is a side structural view of the area of the anti-shake device for removing play.
11(a) is a cross-sectional view taken along line BB of FIG. 10, and (b) is a view in which the movable pressing member is pressed.

In order to fully understand the present invention, the operational advantages of the present invention, and the object achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in each figure indicate like elements.

1 is a perspective view of a working scaffolding ladder according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a front view of FIG. 1, and FIG. 4 is a view of a working scaffold in FIG. 3 , FIG. 5 is a view of a folding state of the working scaffold in FIG. 3, FIG. 6 is an enlarged perspective view of the main part of the height-adjustable stair frame area, FIG. 7 is an enlarged view of area A of FIG. 6, FIGS. 8 and 9 is a view showing the operation of the sub-stair frame of the height-adjustable stair frame, FIG. 10 is a side structural diagram of the anti-shake device area for removing play, and FIG. 11 (a) is a cross-sectional view taken along line BB of FIG. , (b) is a view of a state in which the movable pressing member is pressed.

Referring to these drawings, the working scaffold ladder 100 according to this embodiment can be folded in the working scaffold 140 area unlike the prior art, thereby reducing the space for storage as well as being able to conveniently transport it, especially the worker It allows you to safely carry out folding work even by yourself.

Working step ladder 100 according to this embodiment that can provide this effect is horizontally arranged at the upper end of a plurality of stair frames 110 and a plurality of stair frames 110, and is provided to be foldable from one side It may include a foldable work scaffolding unit 140 and a guide handrail unit 160 used as a handle when climbing on the foldable work scaffolding unit 140 .

In this embodiment, the stair frame 110 is applied as a height-adjustable stair frame 110 in which the height of the foldable work scaffold 140 can be adjusted as shown in FIGS. 3 and 4 .

As such, when the height-adjustable stair frame 110 is applied, all of the work in a relatively low or high position is possible, so there is an advantage that several tasks can be performed with only one work step ladder 100 .

Of course, although the height-adjustable stair frame 110 is applied in this embodiment, a structure in which the height is not adjusted may be applied, and it should be said that all of these matters fall within the scope of the present invention.

Looking at the height-adjustable stair frame 110 , the height-adjustable stair frame 110 includes the main stair frame 120 and the sub stair frame 130 connected to be movable relative to the main stair frame 120 . include

The foot 111 is coupled to the lower end of the main staircase frame 120 . The foot 111 is a rubber cap and is supported on the ground to prevent the main staircase frame 120 from arbitrarily sliding. The foot 111 is provided to be replaceable as a detachable type.

The sub stair frame 130 is connected to be movable relative to the main stair frame 120 as described above.

In FIGS. 3 and 8, when the sub-stair frame 130 is pulled out with respect to the main staircase frame 120 as in FIGS. 4 and 9, the overall length, that is, the height, of the height-adjustable staircase frame 110 can be increased. This may make it possible to work in high places, that is, at heights.

As such, the sub stair frame 130 is connected to be movable relative to the main stair frame 120 . In order to restrict the arbitrary movement of the sub stair frame 130 , the movable rocker 155 and the rocker elastic support 157 are raised and lowered. It is applied to the adjustable stair frame 110 .

The movable locker 155 is provided with a locking pin part 156 that can be inserted into the communication hole 121 communicating with the main stair frame 120 and the sub stair frame 130 and is movably coupled to the main stair frame 120 . do.

In addition, the rocker elastic support part 157 elastically supports the movable rocker 155 in the direction in which the locking pin part 156 is inserted into the communication hole 121 .

Accordingly, when the movable locker 155 is pulled out, the sub-step frame 130 can be moved because the locking pin 156 of the movable locker 155 is removed from the communication hole 121 . When the movement of the sub-stair frame 130 is completed, the locking pin 156 of the movable locker 155 may be operated to be inserted into the communication hole 121 .

A plurality of main and sub stairs 125 and 135 are formed in the main stair frame 120 and the sub stair frame 130 in the horizontal direction, respectively. The worker may step on the main stairs 125 or the main and sub stairs 125 and 135 and climb to the work scaffold 140 .

In the present embodiment, the three-stage main and sub-steps 125 and 135 are applied, but the number may be less or more than the three-stage. Accordingly, the scope of the present invention is not limited to the shape of the drawings.

The foldable work scaffold 140 is a structure disposed horizontally on the upper part of the height-adjustable stair frame 110 . The operator may climb on the foldable work scaffold 140 and perform work while moving on the foldable work scaffold 140 .

At this time, the foldable work scaffold 140 applied to the present embodiment is provided in a foldable manner to be foldable from one side. In particular, since it has a structure that folds upward, it is advantageous for volume reduction.

When the foldable work scaffold 140 is provided as shown in FIG. 5 , the foldable work scaffold 140 can be folded and stored or moved, thereby reducing storage space and making handling easier.

The foldable work scaffold 140 may include a unit scaffold 141 , a side hinge part 142 , a center hinge part 143 , and a link member 146 .

The unit footrest 141 is a part substantially stepped on by the operator. Since it should be able to unfold or fold, the unit footrest 141 is applied as a pair. The pair of unit scaffolds 141 have the same size and structure. Accordingly, the convenience of manufacturing may be increased.

The side hinge part 142 is a structure coupled to each end of the pair of unit footrests 141 . This side hinge part 142 is provided in a shape surrounding the rod-type connection support bar 165, and serves to induce the side to rotate freely when the pair of unit footrests 141 are folded as shown in FIG. do.

In fact, when the pair of unit footrests 141 are folded, the side must be rotated freely in addition to the setter, and the side hinge unit 142 is responsible for this.

The center hinge part 143 is disposed between the pair of unit scaffolds 141 and is connected to the pair of unit scaffolds 141 at the corresponding positions, and when the pair of unit scaffolds 141 is folded, the center (center) It serves to induce free rotation.

Similar to the action of the side hinge unit 142 , when the pair of unit footrests 141 are folded, the setter must rotate freely in addition to the side, and the side hinge unit 142 is responsible for this.

Due to the action of the side hinge part 142 and the center hinge part 143 , the center of the pair of unit footrests 141 can be folded upwards as shown in FIG. 5 . Therefore, it is easy and safe to carry out the folding operation even by the operator alone.

Both ends of the link member 146 are freely rotatably coupled to the unit scaffold 141 and the stair frame. A plurality of link members 146 are applied, and are alternately arranged in the lower portion of the pair of unit footrests 141 .

On the other hand, as previously described, in the conventional ladder, the risk of falling could increase because only the worker had to step on the working scaffold (not shown) while maintaining the balance of the body. In particular, the risk of a safety accident may increase for an elderly worker with significantly lower physical ability, and the guide handrail unit 160 is applied to solve this problem.

The guide handrail unit 160 is connected to the height-adjustable stair frame 110 or the foldable work scaffold 140, and when ascending to the foldable work scaffold 140 through the height-adjustable stair frame 110, as a handle is utilized

When the guide handrail unit 160 is applied in this way, it can be used as a handle when climbing on the foldable work scaffolding unit 140 through the adjustable stair frame 110, and also after climbing on the foldable work scaffolding unit 140. It can also be used as a fall prevention, so the functionality can be very good.

In the case of this embodiment, the guide handrail unit 160 is applied as a rod-shaped member. However, in reality, a structure such as a railing may be applied, and it should be said that all of these matters fall within the scope of the present invention.

On the other hand, the above-mentioned main stair frame 120 and sub stair frame 130 are extruded products, and in that they must move relative to each other, there is no choice but to cause an assembly tolerance between the main stair frame 120 and the sub stair frame 130, When the sub stair frame 130 is pulled out with respect to the main stair frame 120 to increase the height of the foldable work scaffold 140 , it shakes due to the assembly tolerance between the main stair frame 120 and the sub stair frame 130 . this is bound to happen As such, when shaking occurs in the height-adjustable stair frame 110 , it inevitably gives a sense of fear to the worker climbing at a height.

The anti-shake device 150 for removing play is provided in the end region of the main stair frame 120 and one side is selectively pressed into contact with the sub stair frame 130 , and the main stair frame 120 and the sub stair frame 130 . It serves to prevent the sub-stair frame 130 from shaking due to the assembly tolerance between them.

The shaking preventing device 150 for removing the gap may include a shaking preventing unit 151 , a unit fastening part 152 , and a movable pressing member 153 .

The shaking prevention unit 151 is a structure disposed at the end of the main staircase frame 120 . In the present embodiment, the shaking preventing unit 151 has an approximately L-shape structure, which is only an example.

In other words, since the shaking preventing unit 151 is disposed at the end of the main stair frame 120 and then fixed to the main stair frame 120 through the unit fastening part 152, whether it is a L-shape or a U-shaped structure, or a straight line structure is irrelevant. Accordingly, the scope of the present invention is not limited to the shape of the drawings.

The unit fastening part 152 serves to fasten the shaking prevention unit 151 to the main staircase frame 120 .

The unit fastening part 152 includes a fastening bolt 152a, a first fastening hole 152b formed in the shaking preventing unit 151 and fastened while the fastening bolt 152a passes, and the main staircase frame 120. The formed doedoe may include a second fastening hole 152c through which the fastening bolt 152a passing through the first fastening hole 152b is fastened so that the shaking preventing unit 151 is fixed to the main stair frame 120 .

A plurality of fastening bolts 152a, first fastening holes 152b and second fastening holes 152c may be applied to draw out a firm fixing force of the shaking prevention unit 151 .

The movable pressing member 153 is movably coupled to the shaking prevention unit 151 as shown in detail in FIGS. 10 and 11 , and one end of the sub-stair frame is substantially pressed into contact with one side wall of the sub-stair frame 130 . (130) It serves to prevent the shaking.

This movable pressing member 153 has a male threaded thread (153b) formed on the outer wall so as to be screwed to the female threaded thread (120a) formed in the main stair frame (120), and is movably disposed on the wall of the main stair frame (120). The pressing shaft (153a) and the pressing shaft (153a) having a larger area than the pressing shaft (153a) is formed at one end, and the contact pressing portion (153c) that is pressed against one side wall of the sub-step frame 130, and, A shaft head 153d formed at the other end of the pressure shaft 153a and having a through-hole 153e on one side thereof, and a handle ring coupled to the through-hole 153e so that the shaft head 153d is rotated without a tool ( 153f).

Accordingly, as shown in (a) of FIG. 11 , the contact pressing part 153c of the movable pressing member 153 is spaced apart from one side wall of the sub-step frame 130 using the handle ring 153f to the shaft head 153d). When rotating, the pressing shaft 153a and the contact pressing part 153c advance by the action of the female thread 120a and the male thread 153b, and as a result, the contact pressing part 153c as shown in FIG. It can be pressed against the wall of one side of the sub-stair frame 130 . As such, since the contact pressing part 153c provides a pressing force to one side wall of the sub stair frame 130 , the sub stair frame 130 due to the gap between the main stair frame 120 and the sub stair frame 130 . ) can be prevented from oscillating.

On the other hand, the multi-connector 170 for end protection is further applied to the step ladder 100 according to the present embodiment.

The multi-connector 170 for end protection combines the height-adjustable stair frame 110 with the upper end to protect the upper end of the height-adjustable stair frame 110, that is, the upper end of the sub-stair frame 130, while the folding work scaffold (140) and serves to support the guide handrail unit (160).

In other words, the upper end of the sub-stair frame 130 made of extrusion may be sharp, and the sharp end may be protected due to the multi-connector 170 for end protection.

In addition, the multi-connector for end protection 170 forms a place where the guide handrail unit 160 is mounted, and supports the folding work scaffold 140 .

The multi-connector 170 for end protection includes a connector body 171 as an external skeleton. The connector body 171 may be made of a synthetic resin injection material. One side of the connector body 171 forms an inclined inclined surface 172 .

On one side of the connector body 171 , a frame coupling part 173 that is partially fitted and coupled to the upper end of the height-adjustable stair frame 110 , that is, the upper end of the sharp sub-stair frame 130 is formed.

In addition, a unit coupling part 174 to which the guide handrail unit 160 is coupled is provided on the inclined surface 172 of the connector body 171 . Since the guide handrail unit 160 is fitted to the unit coupling part 174, there is an advantage that the guide handrail unit 160 can be inserted only when necessary. Accordingly, when not using the guide handrail unit 160, or when storing, it is sufficient to remove it.

A bar support 175 is formed on one side of the connector body 171 . The bar support part 175 is formed on one side of the connector body 171 while connecting a pair of end protection multi-connector 170 while the connection support bar 165 on which the foldable work scaffold 140 is supported is inserted and supported while being inserted. make a place to be The side hinge part 142 of the working scaffold 140 is connected to the connection support bar 165 coupled to the bar support 175, so that the side hinge part 142 rotates about the connection support bar 165 as an axis. can do.

According to this embodiment, which acts in the structure as described above, the guide handrail unit 160 is applied, while various functional structures such as the foldable work scaffold 140 are applied, so there is no risk of an accident such as a fall. It is possible to induce the work to proceed safely by stepping on (140).

And, unlike the prior art, since the area of the foldable work scaffold 140 can be folded, it is possible to reduce the space for storage as well as to carry it comfortably. .

As such, the present invention is not limited to the described embodiments, and it is apparent to those of ordinary skill in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, it should be said that such modifications or variations are included in the claims of the present invention.

100: work step ladder 110: height adjustable stair frame
111: foot 120: main stair frame
120a: female thread 121: communication hole
125: main stair 130: sub stair frame
135: sub-stair 140: work scaffold
141: unit foot 142: side hinge part
143: center hinge part 146: link member
150: shake prevention device 151: shake prevention unit
152: unit fastening part 153: movable pressing member
153a: pressure shaft 153b: male thread
153c: contact pressing part 153d: shaft head
153e: through hole 153f: handle ring
155: movable rocker 156: locking pin part
157: rocker elastic support 160: guide handrail unit
165: connection support bar 170: multi-connector for end protection
171: connector body 172: inclined surface
173: frame coupling part 174: unit coupling part
175: bar support

Claims (5)

A main stair frame in which a foot supported on the ground is detachably coupled to the lower end and a sub stair frame connected to be movable relative to the main stair frame are provided, but the overall height can be adjusted by the operation of the sub stair frame adjustable height stair frame;
a foldable work scaffold disposed horizontally at the upper end of the stair frame and provided to be foldable from one side;
a movable locker movably coupled to the main stair frame and having a locking pin insertable into a communication hole communicating with the main stair frame and the sub stair frame;
a rocker elastic support part elastically supporting the movable rocker in a direction in which the locking pin part is inserted into the communication hole;
a guide handrail unit connected to the stair frame or the foldable work scaffold and used as a handle when climbing to the foldable work scaffold through the stair frame;
It is provided in the end region of the main stair frame and one side is selectively pressed into contact with the sub stair frame, and is shaken for removing play to prevent the sub stair frame from shaking due to the assembly tolerance between the main stair frame and the sub stair frame prevention device; and
Combined with the upper end of the height-adjustable stair frame to protect the upper end of the height-adjustable stair frame, it includes a multi-connector for end protection that supports the foldable work scaffold and the guide handrail unit,
The foldable work scaffolding portion,
unit footrests arranged in pairs to be mutually foldable;
a side hinge part coupled to the end of the unit scaffold but provided in a shape surrounding the rod-type connection support bar, and guiding the side to rotate freely when the pair of unit scaffolds are folded;
a center hinge part disposed between the pair of unit scaffolds and connected to the pair of unit scaffolds at a corresponding position, and guiding the center to freely rotate when the pair of unit scaffolds are folded; and
A plurality of link members, both ends of which are freely rotatably coupled to the unit scaffold and the stair frame, are alternately disposed in the lower portion of the pair of unit scaffolds,
The center of the pair of unit footrests is folded upward by the action of the side hinge part and the center hinge part,
The anti-shake device for removing the gap,
an anti-shake unit disposed at an end of the main stair frame;
A fastening bolt, a first fastening hole formed in the shaking preventing unit and fastened while the fastening bolt passes through, and a fastening bolt formed in the main stair frame and passing through the first fastening hole are fastened, so that the shaking preventing unit is the main a unit fastening unit having a second fastening hole to be fixed to the stair frame and fastening the shaking preventing unit to the main stair frame; and
A pressure shaft having a male screw thread formed on the outer wall to be screwed to a female screw thread formed in the main step frame and movably disposed on the wall of the main step frame, and having a larger area than the pressure shaft, one end of the pressure shaft A contact pressing portion formed in and pressed against a wall surface of one side of the sub-step frame, a shaft head formed at the other end of the pressing shaft and having a through hole formed on one side, and the shaft head rotated without a tool It has a handle ring coupled to the through hole, but is movably coupled to the shaking prevention unit, and includes a movable pressing member having one end pressed against the wall of one side of the sub-staircase frame,
The multi-connector for end protection includes a connector body, and one side of the connector body forms a sloped surface, and one side of the connector body forms a frame coupling part for coupling while being partially fitted to the upper end of the height-adjustable stair frame. and a unit coupling part to which the guide handrail unit is coupled is provided on the inclined surface of the connector body, and a bar support part is formed on one side of the connector body. delete delete delete delete

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