KR20100042188A

KR20100042188A - Ladder apparatus with a delivery function

Info

Publication number: KR20100042188A
Application number: KR1020080101358A
Authority: KR
Inventors: 김희섭
Original assignee: 김희섭
Priority date: 2008-10-15
Filing date: 2008-10-15
Publication date: 2010-04-23

Abstract

PURPOSE: A ladder with a transferring function is provided to prevent a safety accident by stably putting objects, such as fruits, in a housing box which can move along the ladder. CONSTITUTION: A ladder with a transferring function comprises a ladder frame(4), a hinge bracket, a pulley, a knob, and a lifting cable(16). The ladder frame are parallelly connected to multiple square bars in a width direction by steps(6). The hinge bracket is coupled to the bottom surface of the top end of the ladder frame. The pulley is hinged on inside the hinge bracket. The knob is coupled to the side surface of the pulley, and rotates the pulley. One end of the lifting cable is wound on the outer surface of the pulley, and the other end is coupled to a housing box(10). The lifting cable ascends and descends the housing box.

Description

LADDER APPARATUS WITH A DELIVERY FUNCTION}

The present invention relates to a ladder device provided with a transfer function, and in more detail can be moved to the upper end of the ladder in the state of storing the object on the ladder, the storage box for storing the object from the top of the ladder to the ground, The lifting plate supporting the storage box vertically is moved along the ladder in the longitudinal direction to store the extension in the storage box seated on the ground and to move the storage box to the top of the ladder to increase safety and increase the storage area. The present invention relates to a ladder device with a transfer function that maximizes and enables a safe one-person operation.

As is well known, in general, a ladder is a means used in a high place work, mainly, such as cutting trees, street lamp repair, exterior walls of buildings, paint work, fruit collection of fruit farms, etc. It is used at work.

Therefore, the fruit ore collected at the fruit farm by the height of the height (high-site), or the fruit collected through the work in the farm must be moved up and down by stepping on the step of the ladder directly while holding the tool or fruit basket.

As a result, the ladder is held up and down by the remaining hands, so that the user falls from the ladder very frequently, and in the case of fruit farms, the height of the fruit basket is carried out with one hand, so the risk of falling is further increased. There was a big problem.

In addition, in the case of construction work, if another worker is located under the ladder, the used extension is thrown to another worker waiting under the ladder, but the accident that strikes the extension occurs frequently, but the worker who is suing the finished tool If you go up and down the ladder holding the ladder with one hand to move up and down the risk of falling, there is a problem that you have to move to carry an extension when working alone.

The present invention has been made in view of the above-described prior art, and can move to an upper end of a ladder in a state of storing an object on a ladder, and move a storage box storing an object from the upper end of the ladder to the ground. The lifting plate supporting at the vertical top is moved in the longitudinal direction along the ladder to store the extension in the storage box seated on the ground and to move the storage box to the top of the ladder to increase safety and maximize the storage area. It is an object of the present invention to provide a ladder device with a transfer function, which enables a safe one-person operation.

In order to achieve the above object, according to a preferred embodiment of the present invention, a plurality of rectangular bars are connected to the ladder frame 4 in parallel by the footrest 6 in the width direction; A hinge bracket (26) coupled to an upper lower surface of the ladder frame (4); A pulley 18 which is hinged to the inside of the hinge bracket 26 and on which an elevating cable 16 is wound around its outer periphery; A handle (34) coupled to the side of the pulley (18) to rotate the pulley (18) forward and backward; One end is wound around the outer periphery of the pulley 18, and the other end is composed of a lifting cable 16 coupled with the storage box 10, so that the storage box 10 is elevated in the vertical direction. There is provided a ladder device with a transfer function.

Preferably, the pulley 18 has a positioning plate 20 is provided with a plurality of irregularities on the outer periphery of the predetermined portion at the center thereof, is hinged to the upper center predetermined portion of the ladder frame 4, Ladder device with a transfer function is provided, characterized in that it further includes a positioning tool 44 coupled to the recessed portion of the positioning plate 20 to limit the rotation of the pulley 18.

On the other hand, the present invention is a ladder frame 4 is connected to the plurality of square rods in parallel in the width direction by the footrest (6); Slide guides (8) each of which is longitudinally coupled to a lower surface of the ladder frame (4), and slide grooves are formed on the side surfaces thereof; An elevating drive unit 22 having an upper end coupled to the slide guide 8 so as to be movable and elevating driving the storage box 10 coupled to the lower end thereof; It is coupled to the lower surface of the upper end of the ladder frame (4), characterized in that it comprises a lifting plate positioning unit 60 for moving the lifting drive unit 22 along the slide guide (8) Ladder arrangements are provided.

Preferably, the elevating drive unit 22 has a projection bracket 36 formed with a guide engaging projection 38 on the upper surface thereof is coupled to the slide guide 8, the both sides are bent to the hinge hole A lifting plate 24 provided with a hinge bracket 26 having a 28 formed thereon; A pulley 18 which is hinged to the inside of the hinge bracket 26 and on which an elevating cable 16 is wound around its outer periphery; A rotating plate 30 having a handle 34 coupled to the pulley 18 to rotate the pulley 18 in a forward and reverse direction; One end of the pulley 18 is wound, and the other end is provided with a ladder device with a transfer function, characterized in that it comprises a lifting cable 16 coupled to the storage box 10.

Preferably, the pulley 18 has a positioning plate 20 is interposed in the central predetermined portion, the positioning plate 20 is formed a plurality of irregularities on the outer periphery, the central predetermined portion of the elevating plate 24 The cutting hole 42 is formed in the hinge bracket 40 is provided on both sides of the cutting hole 42, the hinge is coupled to the hinge bracket 40 and the positioning projection coupled to the positioning plate 20 There is provided a ladder apparatus with a transfer function, characterized in that the positioning tool 44 is further formed with a lower end 46.

Preferably, the lifting cable 16 has a coupling ring 14 is coupled to the lower end, the coupling ring 14 is a snap ring coupled to and released from the rib 12 formed on the top of the storage box 10 Provided is a ladder device with a transfer function, characterized in that.

Preferably, the elevating plate positioning unit 60 and the hinge bracket 62 is coupled to the lower surface of the upper end of the ladder frame (4); A pulley 66 coupled to the inside of the hinge bracket 62 by a hinge shaft 64 and having a winding cable 50 wound around its outer circumference; A handle (70) coupled to the side of the pulley (66) to rotate the pulley (66) in forward and reverse directions; One end is wound around the outer periphery of the pulley 66, the other end is provided with a ladder device with a transfer function, characterized in that consisting of a winding cable 50 connected to the lifting and lowering drive unit (22).

Preferably, the guide coupling projection 38 is provided with a ladder device having a transfer function, characterized in that the bearing 52 is further coupled to the outer periphery.

Preferably, the pulley 66 has a positioning plate 68 having a plurality of irregularities on the outer periphery of the predetermined portion in the center thereof, is hinged to the upper center predetermined portion of the ladder frame 4, Ladder device provided with a transfer function, characterized in that the projection plate formed at the lower end of the positioning plate 68 is coupled and decoupled further includes a positioning tool 71 to limit the rotation of the pulley 66 Is provided.

Preferably, the elevating plate 24 is provided with a ladder device having a transfer function, characterized in that the front is further formed with a cable bracket 48 connected to the winding cable 50.

Ladder device equipped with a transfer function according to the present invention can prevent the safety accident because it does not need to hold the ladder frame with only one hand in the state of holding a heavy extension or object with one hand, and prevent the safety accident, orchards in orchards or farms In the case of working, a lot of fruit trees can be stably placed in the storage box and then moved to the ground and then climbed up and down on a ladder to prevent safety accidents, and more fruit trees can be collected to increase work efficiency. .

Hereinafter, a ladder device with a transfer function according to a first embodiment of the present invention will be described in detail with reference to the drawings.

1 is a side view showing the external appearance of the ladder device with a transfer function according to a first embodiment of the present invention.

Referring to this, the ladder device 2 with a transfer function according to the first embodiment of the present invention moves to the upper end of the ladder in a state in which the object is stored in the ladder, and the object is stored in the ground from the top of the ladder. The box can be moved, and the necessary extension for the work can be stored in the storage box seated on the ground, and the storage box can be moved to the top of the ladder to increase safety, maximize the storage area, and enable safe one-person work. It is a ladder device.

At this time, the ladder device 2 with a transfer function according to the first embodiment of the present invention is a fixed type of the hinge bracket 26, which hangs the storage box 10 at the bottom thereof, is fixed. Ladder device 2 ′ with a transfer function according to the embodiment is a movable type in which a lifting plate 24 (FIG. 2) suspending the storage box 10 moves along the longitudinal direction of the ladder frame 4. to be.

More specifically, the ladder device 2 with the transfer function according to the first embodiment of the present invention is provided with a ladder frame 4 in which a plurality of square bars are connected in parallel by the footrest 6 in the width direction. Through such a ladder frame 4 and the footrest 6, a known ladder can be configured.

In addition, the ladder device 2 with the transfer function according to the first embodiment of the present invention is provided with a hinge bracket 26 coupled to the upper and lower surfaces of the ladder frame 4, the hinge bracket 26 of the A pulley 18 is hinged therein and provided with a pulley 18 on which an elevating cable 16 is wound around its outer circumference, and is coupled to a side of the pulley 18 to rotate the pulley 18 in a forward and reverse direction. Is provided.

On the other hand, the ladder device 2 with a transfer function according to the first embodiment of the present invention is one end of the winding around the outer periphery of the pulley 18, the other end of the elevating cable coupled with the storage box 10 It consists of (16), so as to raise and lower the storage box 10 in the vertical direction.

At this time, the pulley 18 has a positioning plate 20 having a plurality of irregularities on the outer periphery of the predetermined portion of the center is interposed, the hinge is coupled to the upper portion of the center of the ladder frame 4, A positioning tool 44 is further included to engage / disengage the recessed portion of the positioning plate 20 to limit rotation of the pulley 18.

Ladder device 2 with a transfer function according to the first embodiment of the present invention made of the above-described configuration, first, in a state in which the positioning tool 44 to the positioning plate 20 released, The ladder frame 4 is installed to be inclined at an angle to the wall surface to be lifted and installed.

At this time, the pulley 18 coupled to the hinge bracket 26 has been released from the positioning tool 44, so that the lifting cable 16 wound around its outer periphery is released and the storage box 10 Only the ladder frame 4 in a state positioned on the ground is installed to be inclined at an angle to the wall.

In this state, the operator stores the extension for the height operation in the storage box 10 and moves the storage box 10 vertically downward on the upper end of the ladder frame (4).

Then, the worker steps on the footrest 6 coupled to the inside of the ladder frame 4 to move up to the upper end of the ladder frame (4). In this state, the worker presses the end of the positioning tool 44 with one hand to release the positioning of the positioning tool 44 and the positioning plate 20 and the other hand grips the handle 34. Rotate in the state.

Then, as the pulley 18 rotates, the elevating cable 16 is wound around its outer circumference, and the storage box 10 is raised vertically. At this time, the positioning tool 44 is made of a structure in which a coupling protrusion (not shown) formed at one end of the positioning tool 44 is coupled to the positioning plate 20, so that when the worker releases the handle 34, the positioning tool ( 44 is coupled to the recessed portion of the positioning plate 20 to prevent the pulley 18 from rotating in reverse.

Therefore, when the worker releases the handle 34 in a state in which the storage box 10 is moved to an appropriate height, the positioning tool 44 is coupled to the recessed portion of the positioning plate 20 to store the storage box ( 10) does not descend arbitrarily. In that state, the worker can take out the extension accommodated in the storage box 10.

If the worker is overworked, the storage box 10 is wound around the pulley 18 in an empty box and moved to the upper end of the ladder frame 4, and collected in the storage box 10. You will be able to fill one fruit tree.

If the extension is removed from the storage box 10 or the fruit tree is completely filled in the storage box 10, the worker holds the handle 34 with one hand and the positioning is performed with the other hand. Lift the sphere 44 up.

Then, the weight of the storage box 10 is transmitted to the pulley 18 so that the pulley 18 is reversely rotated so that the storage box 10 lowers to the ground. At this time, the operator rotates the handle 34 in the reverse rotation direction to adjust the falling speed of the storage box 10 so that the storage box 10 is lowered to the ground.

When the storage box 10 is seated on the ground, the worker can stably step on the footrest 6 of the ladder frame 4 while holding the ladder frame 4 with both hands.

Therefore, the ladder device 2 with the transfer function according to the first embodiment of the present invention is held in the state in which a heavy extension or an object is gripped with one hand, and the ladder frame 4 is not held up and down with only one left hand. Therefore, it is possible to prevent safety accidents, and in the case of orchard work in farms or farmhouses, many fruit trees can be stably put in the storage box 10 and moved to the ground after moving up and down the ladder to prevent safety accidents. The fruit can be collected, thus increasing the work efficiency.

Hereinafter, a ladder apparatus with a transfer function according to a second embodiment of the present invention will be described in detail with reference to the drawings.

Figure 2 is a side view showing the outer appearance of the ladder device with a transfer function according to a second embodiment of the present invention, Figure 3 is a lift drive structure of the ladder device with a transfer function according to a second embodiment of the present invention Figure 4 is an exploded perspective view of the main part, Figure 4 is a side cross-sectional view showing the structure of the lifting drive unit of the ladder device with a transfer function according to a second embodiment of the present invention, Figure 5 is a transfer function according to a second embodiment of the present invention It is a main side sectional view which shows the structure of the elevating plate positioning part of the ladder apparatus provided.

Referring to this, the ladder apparatus 2 'equipped with the transfer function according to the second embodiment of the present invention has the same purpose as the first embodiment, but in practice, the worker only needs to make sure that the operator Since it is not working, it relates to a ladder device that can freely change the position when the storage box 10 is raised.

In other words, in the state where the upper end of the ladder is placed in a position higher than the working position during the ladder work, there is a case that the worker is working up to the middle of the ladder.

Therefore, the ladder apparatus 2 'equipped with a transfer function according to the second embodiment of the present invention relates to a ladder apparatus that can freely change a position when the storage box 10 is fully raised.

To this end, the ladder apparatus 2 'equipped with a transfer function according to the second embodiment of the present invention includes: a ladder frame 4 in which a plurality of square bars are connected in parallel by the footrest 6 in the width direction; A slide guide 8 is provided on the lower surface of the ladder frame 4 in the longitudinal direction, and slide grooves are formed on the side surfaces thereof, respectively.

In addition, the ladder device (2 ') with a transfer function according to a second embodiment of the present invention is coupled to the slide guide 8 so that its upper end is movable, the storage box 10 coupled to the lower end A lift driver 22 for lifting and lowering; It is coupled to the lower surface of the upper end of the ladder frame 4, the lifting plate positioning unit 60 for moving the lifting drive unit 22 along the slide guide 8 is configured.

At this time, the elevating drive unit 22 has a projection bracket 36 formed with a guide engaging projection 38 on the upper surface thereof is coupled to the slide guide 8, the both sides are bent to the hinge hole ( A lifting plate 24 provided with a hinge bracket 26 having a 28 formed thereon; A pulley 18 which is hinged to the inside of the hinge bracket 26 and on which an elevating cable 16 is wound around its outer periphery; A rotating plate 30 having a handle 34 coupled to the pulley 18 to rotate the pulley 18 in a forward and reverse direction; One end of the pulley 18 is wound, and the other end includes a lifting cable 16 coupled with the storage box 10.

In addition, the pulley 18 provided in the ladder device 2 'equipped with a transfer function according to the second embodiment of the present invention, the positioning plate 20 is interposed in the central predetermined portion, the positioning plate 20 The outer periphery is formed with a plurality of irregularities, the cutting hole 42 is formed in the central predetermined portion of the lifting plate 24, the hinge bracket 40 is provided on both sides of the cutting hole 42, A positioning tool 44 hinged to the hinge bracket 40 and coupled to the positioning plate 20 is formed at a lower end thereof.

Accordingly, in the ladder device 2 ′ equipped with the transfer function according to the second embodiment of the present invention, the worker moves the lifting driver 22 along the slide guide 8 to a predetermined position and fixes the worker. The extension is stored in the storage box 10 for the height operation.

Preferably, the operator may move the lifting and lowering part 22 to the lowermost end of the slide guide 8 and allow the storage box 10 to be seated on the ground.

In this state, the worker steps on the footrest 6 coupled to the inside of the ladder frame 4 and moves up to the upper end of the ladder frame 4. Then, the operator operates the lifting plate positioning unit 60 with one hand to move the lifting driving unit 22 to the worker's position.

In addition, when the handle 34 is rotated in a gripped state, the pulley 66 rotates to wind the lifting cable 16 around its outer circumference, and the storage box 10 is vertically upwardly raised. . At this time, the positioning tool 44 is made of a structure in which the engaging projection 46 formed at one end thereof is always coupled to the positioning plate 20, so that when the operator releases the handle 34, the positioning tool 44 Coupling projection 46 of the () is coupled to the recessed portion of the positioning plate 20 to prevent the pulley 18 to reverse rotation.

Therefore, when the worker 34 releases the handle in the state in which the storage box 10 is moved to a suitable height, the engaging projection 46 of the positioning tool 44 is provided in the recessed portion of the positioning plate 20. The storage box 10 is combined so that it does not descend arbitrarily. In that state, the worker can take out the extension accommodated in the storage box 10.

In addition, the elevating cable 16 has a coupling ring 14 is coupled to the lower end, the coupling ring 14 is a snap ring coupled to and released from the rib 12 formed on the upper end of the storage box 10. . Accordingly, the rib 12 and the elevating cable 16 of the storage box 10 may be easily coupled and separated by simply operating the coupling ring 14.

Position when the storage box 10 rises because the operator does not necessarily work only on the upper end of the ladder during the height operation using the ladder device 2 'with the transfer function according to the second embodiment of the present invention. It has a structure that can change freely.

To this end, the lifting plate positioning unit 60 provided in the ladder device 2 'with the transfer function according to the second embodiment of the present invention is a hinge bracket coupled to the upper surface of the ladder frame (4) 62; A pulley 66 coupled to the inside of the hinge bracket 62 by a hinge shaft 64 and having a winding cable 50 wound around its outer circumference; A handle (70) coupled to the side of the pulley (66) to rotate the pulley (66) in forward and reverse directions; One end of the pulley 66 is wound around the outer circumference thereof, and the other end thereof is composed of a winding cable 50 connected to the lift driver 22.

On the other hand, the pulley 66 provided in the elevating plate positioning unit 60 has a positioning plate 68, which is provided with a plurality of irregularities on the outer periphery thereof at a central predetermined portion thereof, and the ladder frame 4 Hinges are coupled to the central portion of the upper end of the upper end, and a positioning tool 71 further restricts rotation of the pulley 66 by engaging and disengaging the protrusions formed at the lower end of the main portion of the positioning plate 68. have.

In addition, the elevating plate 24 is further formed in front of the cable bracket 48 is connected to the winding cable 50, the guide coupling projection 38 is further bearing 52 on the outer periphery Coupled with, the lifting driving unit 22 is configured to minimize the friction force when the lifting and lowering along the slide guide (8).

Reference numeral 52 denotes a guide ring.

With reference to the accompanying drawings, the function and action of the ladder device with a transfer function according to the second embodiment of the present invention of the above configuration will be described in detail.

First, an operator releases the positioning tool 71 from the positioning plate 68 provided in the lifting plate positioning unit 60 to move the lifting driving unit 22 to the lowest end of the slide guide 8. In the moved state, the ladder frame 4 is installed to be inclined at an angle to the wall surface to be lifted and installed.

At this time, the pulley 66 coupled to the hinge bracket 62 has the positioning tool 71 decoupled, so that the winding cable 50 wound around the outer circumference of the pulley 66 is released and the storage box 10 is closed. It is located at the bottom of the slide guide (8).

In this state, the worker stores the extension for the height operation in the storage box 10 and the worker steps on the footrest 6 coupled to the inside of the ladder frame 4 to work on the ladder frame 4. Go to location. In this state, the worker presses the positioning tool 71 of the lifting plate positioning unit 60 to release the coupling of the positioning tool 71 and the positioning plate 68, and with the other hand the handle ( 70) is rotated while holding.

Then, as the pulley 66 rotates, the winding cable 50 is wound around the outer periphery of the pulley 66, and the lifting and driving part 22 connected to the winding cable 50 moves the slide guide 8. Will rise. At this time, the positioning tool 71 is composed of a structure in which a coupling protrusion (not shown) formed at one end of the positioning tool 71 is coupled to the positioning plate 68, so that when the worker releases the handle 70, the positioning tool ( 71 is coupled to the recessed portion of the positioning plate 68 to prevent the pulley 66 from rotating in reverse.

Therefore, when the worker releases the handle 34 in the state in which the lifting driving part 22 is moved to an appropriate height, the positioning tool 71 is coupled to the recess of the positioning plate 68 and the lifting driving part. 22 does not descend along the slide guide 8 arbitrarily.

In this state, the worker presses the end of the positioning tool 44 provided in the lifting driving part 22 with one hand to couple the engaging projection 46 of the positioning tool 44 to the positioning plate 20. Release and rotate with the other hand holding the handle (34).

Therefore, the ladder device 2 'with the transfer function according to the second embodiment of the present invention holds the ladder frame 4 with only one left hand while the heavy extension or object is gripped with one hand, so that the ladder does not move up or down. Since it is not necessary to prevent safety accidents, or when working in an orchard or farmhouse, many fruit trees can be stably put in the storage box 10 and moved to the ground after moving up and down the ladder to prevent safety accidents. Many fruit trees can be harvested, increasing work efficiency.

In addition, the ladder device (2 ') with a transfer function according to the second embodiment of the present invention can change the fixed position of the elevating drive unit 22, the operator works at the top or middle of the ladder frame (4) Even when the storage box 10 can be raised to a nearby position, it is possible to conveniently take out the goods stored in the storage box 10, or put the harvested fruit in the storage box (10).

On the other hand, the ladder device with a transfer function according to an embodiment of the present invention is not limited to the above embodiments, but various modifications can be made without departing from the technical gist of the present invention.

1 is a side view showing the external appearance of the ladder device with a transfer function according to a first embodiment of the present invention,

Figure 2 is a side view showing the external appearance of the ladder device with a transfer function according to a second embodiment of the present invention,

Figure 3 is an exploded perspective view showing the main structure of the lifting drive unit structure of the ladder device with a transfer function according to a second embodiment of the present invention,

Figure 4 is a side cross-sectional view showing the main structure of the elevating drive unit structure of the ladder device with a transfer function according to a second embodiment of the present invention,

5 is a side cross-sectional view showing a main part of a lifting plate positioning unit structure of a ladder device with a transfer function according to a second embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

4: ladder frame, 6: footrest,

8: slide guide, 10: storage box,

14: coupling ring, 16: lifting cable,

18: pulley, 20: positioning plate,

22: lifting drive part, 24: lifting plate,

26: hinge bracket, 28: hinge ball,

30: rotating plate, 32: center shaft,

34: handle, 36: protrusion bracket,

38: guide coupling protrusion, 40: hinge bracket,

42: cutting hole, 44: positioning hole,

46: engaging projection, 50: winding cable,

60: lifting plate positioning part, 62: hinge bracket,

64: hinge axis, 66: pulley,

68: positioning plate, 70: handle,

71: Positioning tool.

Claims

A ladder frame 4 in which a plurality of square bars are connected in parallel by the stool 6 in the width direction;

A hinge bracket (26) coupled to an upper lower surface of the ladder frame (4);

A pulley 18 which is hinged to the inside of the hinge bracket 26 and on which an elevating cable 16 is wound around its outer periphery;

A handle (34) coupled to the side of the pulley (18) to rotate the pulley (18) forward and backward;

One end is wound around the outer periphery of the pulley 18, and the other end is composed of a lifting cable 16 coupled with the storage box 10, so that the storage box 10 is elevated in the vertical direction. Ladder device with a transfer function characterized in that.

2. The pulley (18) according to claim 1, wherein the pulley (18) is provided with a positioning plate (20) provided with a plurality of irregularities on its outer periphery at its central predetermined portion, and hinged at the upper central predetermined portion of the ladder frame (4). And a positioning tool 44 coupled to the recessed portion of the positioning plate 20 to limit rotation of the pulley 18.

Slide guides (8) each of which is longitudinally coupled to a lower surface of the ladder frame (4), and slide grooves are formed on the side surfaces thereof;

An elevating drive unit 22 having an upper end coupled to the slide guide 8 so as to be movable and elevating driving the storage box 10 coupled to the lower end thereof;

It is coupled to the lower surface of the upper end of the ladder frame (4), characterized in that it comprises a lifting plate positioning unit 60 for moving the lifting drive unit 22 along the slide guide (8) Ladder device.

4. The lift driving unit 22 according to claim 3,

A hinge bracket (26) having a hinge bracket (28) having a hinge hole (28) formed on the upper surface thereof is coupled to the slide guide (8), and having a guide coupling protrusion (38) formed on an upper surface thereof. And provided with a lifting plate 24;

A rotating plate 30 having a handle 34 coupled to the pulley 18 to rotate the pulley 18 in a forward and reverse direction;

One end of the pulley (18) is wound, the other end of the ladder device having a transfer function, characterized in that it comprises a lifting cable (16) coupled to the storage box (10).

According to claim 3 to 4, wherein the pulley 18, the positioning plate 20 is interposed in the central predetermined portion, the positioning plate 20 is formed with a plurality of irregularities on the outer periphery, the lifting plate An incision hole 42 is formed at a central predetermined portion of the 24, and hinge brackets 40 are provided at both sides of the incision hole 42, and are hinged to the hinge bracket 40 and the positioning plate 20 is provided. Ladder device with a transfer function, characterized in that it further comprises a positioning tool 44 is formed at the bottom of the positioning protrusions 46 coupled to.

According to claim 3, The elevating cable 16 is coupled to the coupling ring 14 at the lower end, the coupling ring 14 is coupled to and coupled to the rib 12 formed on the upper end of the storage box 10 Ladder device with a transfer function, characterized in that the snap ring is released.

4. The elevating plate positioning unit (60) according to claim 3,

A hinge bracket (62) coupled to an upper lower surface of the ladder frame (4);

A pulley 66 coupled to the inside of the hinge bracket 62 by a hinge shaft 64 and having a winding cable 50 wound around its outer circumference;

A handle (70) coupled to the side of the pulley (66) to rotate the pulley (66) in forward and reverse directions;

One end is wound around the outer periphery of the pulley (66), the other end of the ladder device with a transfer function, characterized in that consisting of a winding cable (50) connected to the elevating drive (22).

5. The ladder apparatus according to claim 4, wherein the guide coupling protrusion (38) further comprises a bearing (52) coupled to an outer circumference thereof.

8. The pulley (66) is provided with a positioning plate (68) having a plurality of irregularities at its outer circumference at a central predetermined portion thereof, and a hinge at an upper central predetermined portion of the ladder frame (4). Is coupled, the projection formed on the bottom portion of the positioning plate 68 has a transfer function characterized in that it further includes a positioning tool 71 for engaging and disengaging to limit the rotation of the pulley (66) Ladder device.

8. The ladder apparatus according to claim 4, wherein the elevating plate is further provided with a cable bracket 48 connected to the winding cable 50 in front of the lifting plate 24.