KR101769363B1

KR101769363B1 - Ladder

Info

Publication number: KR101769363B1
Application number: KR1020160031030A
Authority: KR
Inventors: 김동하; 윤성진
Original assignee: 청주대학교 산학협력단
Priority date: 2016-03-15
Filing date: 2016-03-15
Publication date: 2017-08-18

Abstract

The ladder according to the present invention comprises a pair of upper plates arranged in a state in which the front surfaces are in close contact with each other and in which the other side is horizontally rotated with respect to the vertical rotation center in one direction and the interval between them is adjusted, A pair of support members arranged along the longitudinal direction and having an upper end rotatably coupled to a lower portion of the upper plates so as to be rotatable forward and backward and to be spaced from each other, both ends in the longitudinal direction being rotatably coupled to the lower portions of the upper plates, And a link member for limiting the separation distance so that the top plates do not deviate from the maximum rotation angle.

Description

Ladder {LADDER}

More particularly, the present invention relates to a ladder, and more particularly, to an apparatus and a method for controlling a ladder, and more particularly, This is about a ladder that can be secured.

Generally, a ladder is used at the time of a high altitude operation and has a step shape so that an operator can ascend to a certain height.

The conventional ladder is configured such that a pair of supports formed with a plurality of foot plates are hinged to each other so as to be folded or unfolded, and the lower end of the support is laid on a mounting surface after spreading to a certain width.

Thereafter, the worker steps up the foot of the support in succession and ascends to a certain height, and performs a complaint operation with both feet on the footboard.

Among such conventional ladders, an upper plate is formed on the upper part of the support so that the operator can perform the elevation work at a higher position.

However, the conventional ladder can not secure a support force in a direction perpendicular to the pivoting direction of the support table because the pair of supports extend in a straight line, and since the width of the upper plate that the operator can climb is fixed, There was concern that the worker would fall.

In addition, the conventional ladder has a large volume even when the support is folded, so that it is difficult to store the ladder, and it is also difficult to carry a ladder having a large weight.

Prior art related to the present invention is the Korean Registered Application No. 20-0464791 (Jan. 11, 2013), which discloses a fixed safety ladder.

The object of the present invention is to provide an apparatus and a method for controlling a width of a top plate and a supporting plate by controlling a width of a top plate and a mounting angle of a support plate in a wide range while reducing the width of the top plate, So that it is possible to secure the safety in the ladder operation and to ensure the ease of storage when not in use.

In addition, since the space between the upper plate and the support table is reduced, the movable table is moved to a desired position by the use of a moving roller, and the support is further supported between the support tables by using an auxiliary support that can be extended and retracted. Which can prevent the support member from being easily conducted by the support member.

The ladder according to the present invention comprises a pair of upper plates arranged in parallel with each other in a state in which their front surfaces are in close contact with each other and the other side of which is horizontally rotated with respect to a vertical rotation center in one direction, A pair of support members arranged along the vertical direction and having an upper portion rotatably coupled to the lower portions of the upper plates so as to be spaced from each other, both ends in the longitudinal direction being rotatably coupled to the lower portions of the upper plates, The upper surface of the upper plate may be in close contact with the upper surface of the upper plate through a folding operation of the upper plate.

Here, vertical pins for forming the vertical rotation center are vertically coupled to one side of the upper plates, and the link members are disposed in the other side of the upper plates opposite to the vertical pins.

In addition, a latching pin and a hook are provided on one side surface of the upper plates on which the link member is disposed, respectively, and the hook is hooked or hooked to the latching pin through a rotation in the vertical direction.

In addition, a first guide beam and a second guide beam, which are curved with a radius of rotation of the upper plates, are horizontally coupled to the lower portions of the upper plates, respectively, and the first guide beams and the second guide beams, And the length is expanded and contracted while being slid by the rotation of the upper plates.

In addition, it is preferable that the pair of support rods are formed with one or more split ends horizontally divided along the longitudinal direction, and the split ends are connected to be folded or unfolded by the horizontal fins forming the horizontal rotation center.

Preferably, the split end is further coupled with a lock member that locks or unlocks the folded or unfolded state to be maintained.

In addition, a moving roller rotatable forward and backward is further coupled to the outside of the horizontal pin, and a lower end of the moving roller is exposed downward when the lower ends of the pair of supports are folded upward.

The link member may include a first link whose one end in the longitudinal direction is coupled to the lower end of one of the upper plates to be rotatable in the horizontal direction and one end in the longitudinal direction that is horizontally rotatably coupled to the lower end of the other of the upper plates, And one end of the first link intersecting with one end of the first link is connected to the second link such that the first link is horizontally rotatable with respect to the vertical rotation center.

The first link and the second link are folded while being horizontally rotated in the direction of the vertical rotation center of the upper plates when the front surfaces of the upper plates are in close contact with each other, .

Preferably, one end of the second link is bent and extended in a direction opposite to the vertical rotation center, and is coupled to one end of the first link so as to be horizontally rotatable.

In addition, a vertical pin for forming the vertical rotation center is coupled to the vertical rotation center of the first link and the second link, and between the pair of supports at the lower end of the link member, It is preferable that an auxiliary support for supporting is further joined.

Preferably, the auxiliary support is formed with one or more split ends horizontally divided along the longitudinal direction, and the split ends are connected to be folded or unfolded by horizontal pins forming a horizontal rotation center.

It is further preferable that the split end is further coupled with a lock member that locks or unlocks the folded or unfolded state to be maintained.

The auxiliary support may include an upper beam having an upper end coupled to a lower end of the vertical pin and a pair of lower beams having upper ends rotatably coupled to lower ends of the upper beams and having a gap between them, desirable.

The present invention has the effect of securing safety in the ladder operation by controlling the width of the upper plate widely during use and by widely adjusting the installation angle of the support base.

In addition, when the non-use case is used, the width of the upper plate is reduced and at the same time, the installation angle and length of the support frame are reduced, thereby ensuring the ease of storage when not in use.

Further, by moving the upper plate and the support base to a desired position by using the moving roller in a state in which the volume of the upper plate and the support base is reduced, the ease of transportation can be secured.

In addition, by supporting the space between the supports by using an auxiliary support capable of extending and contracting the length, it is possible to prevent the support from being conducted by the shaking.

1 is a perspective view showing a ladder according to the present invention.
2 is a front view showing a state in which the supports of the ladder according to the present invention are unfolded.
3 is a rear view showing a state in which the supports of the ladder according to the present invention are unfolded.
4 is a side view showing a state in which the supports of the ladder according to the present invention are unfolded.
5 is a plan view showing a state in which the supports of the ladder according to the present invention are unfolded.
6 is a bottom view showing a state in which the supports of the ladder according to the present invention are unfolded.
7 is a perspective view showing a state in which a support of a ladder according to the present invention is folded.
8 is a side view showing a state in which a support of a ladder according to the present invention is folded.
FIG. 9 is an enlarged perspective view showing a state in which the upper plates of the ladder according to the present invention are separated from each other.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving it will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 1 is a perspective view showing a ladder according to the present invention, FIG. 2 is a front view for showing a state in which supports of a ladder according to the present invention are opened, and FIG. 3 is a view showing a state in which supports of a ladder according to the present invention are unfolded Is a back view for giving a period.

5 is a plan view showing a state in which the supports of the ladder according to the present invention are unfolded. FIG. 6 is a plan view of the ladder according to the present invention, Is a bottom view for showing the state of the supports of the apparatus.

FIG. 7 is a perspective view showing a state in which a support of a ladder according to the present invention is folded, FIG. 8 is a side view showing a state in which a support of a ladder according to the present invention is folded, Is a perspective enlarged perspective view for showing a state in which the top plates of the ladder are separated from each other.

1 to 9, a ladder according to the present invention includes a pair of upper plates 100, a pair of supports 200, and a link member 300.

First, the upper plates 100 are horizontally positioned at the uppermost end of the ladder, and the upper plates 100 are formed to have a certain width so that the operator can step on.

Here, the upper surface of the upper plates 100 may be provided with anti-slippery ridges so that the operator's feet do not slip easily.

The upper plates 100 may be made of a resin-based material for preventing slippage, or a non-slip material may be attached to the upper surfaces of the upper plates 100.

The upper plates 100 are divided into two bodies. When the upper surfaces of the upper plates 100 are in close contact with each other, they form one body.

On the contrary, when the front surfaces of the upper plates 100 are rotated in a direction away from each other, the upper surface of the upper plate 100 can be widened.

In more detail, the upper plates 100 may have a shape corresponding to each other, and the upper plates 100 are arranged in parallel with each other in a state in which the fronts are in close contact with each other.

Since the other side of the upper plates 100 is rotated in the opposite direction with respect to the vertical rotation center in one direction of the left and right directions, the interval between the upper plates 100 can be adjusted.

3, a vertical pin 110 for forming a vertical rotation center may be vertically coupled to one side of the upper plates 100. As shown in FIG.

For this, a coupling portion (not shown) which can be vertically crossed can be formed at one side of the upper plate 100, and the vertical pin 110 can be coupled through the coupling portion.

At this time, the vertical pin 110 and the engaging portion may be positioned below the upper plate 100 so as not to be exposed to the upper portions of the upper plates 100.

That is, the width can be varied by folding or unfolding the other direction corresponding to one direction of the top plates 100 coupled with the vertical pins 110.

The first guide beam 120 and the second guide beam 130, which are curved by the radius of rotation of the upper plates 100, may be horizontally coupled to the lower portions of the upper plates 100.

9, the first guide beam 120 and the second guide beam 130 are slidably coupled to each other at one end of the first guide beam 120 and the second guide beam 130, And the length is expanded and contracted while being slid by the rotation of the upper plates 100.

For this, one end of the first guide beam 120 and the second guide beam 130 may have a tube shape having a guide groove formed therein, and the first guide beam 120 and the second guide beam 130 Any one of the beams 130 has a shape and size corresponding to the guide grooves.

A hook pin 140 and a hook 150 may be provided on one side of the upper plate 100 opposite to the vertical pin 110.

The engaging pin 140 may be horizontally protruded from one side of one of the upper plates 100 and a protrusion protruding with a larger diameter may be formed at a protruded end of the engaging pin 140 .

The hook 150 is engaged with the hooking pin 140 through rotation in the vertical direction so that the hook 150 is rotatably coupled to the other side of the upper plates 100.

One end of the hook 150 may be coupled with a separate pin forming a horizontal rotation center and a groove corresponding to the outer diameter of the engagement pin 140 may be formed at the other end of the hook 150. [ have.

For example, in the case where the hooks 150 are rotated in a state where the front surfaces of the upper plates 100 are in close contact with each other and are engaged with the outer diameter of the latching pins 140, one direction of the upper plates 100 is perpendicular to the vertical pins 110 It maintains the close contact state without being rotated by reference.

The supports 200 are rotatably coupled to the lower portion of the top plates 100 in the forward and backward directions, respectively, so that the spacing between the supports is adjusted.

Here, the support rods 200 may be provided as a pair of beams having a length in the vertical direction, and the support rods 200 are installed horizontally so that the worker can step on the feet.

The footrest 210 may be installed along the vertical direction of the supports 200 so that the worker can move up and down the position and the floor of the upper boards 100.

At this time, the footrest 210 can be inclined so that the upper surface of the footrests 200 can be horizontally positioned when the supports 200 are spread in the corresponding direction.

On the upper surface of the foot plate 210, anti-slippery ridges may be formed to prevent the operator's foot from slipping.

In addition, the support rods 200 may have one or more split ends horizontally divided along the longitudinal direction, and the split ends may be connected to be folded or unfolded by the horizontal pins 220 forming the horizontal rotation center .

That is, when the non-use case is not in use, the support rods 200 may be rotated forward and folded, and the lower ends of the support rods 200 may be folded up on the basis of the horizontal pins 220 to reduce the volume.

In addition, the horizontal pin 220 may further be coupled with a lock member 230 that locks or unlocks the support pins 200 to maintain the folded or unfolded state of the support pins 200.

The lock member 230 can be switched to the locked or unlocked state by a lock / unlock operation of the switch 221 exposed in the axial direction of the horizontal pin 220. [

The locking member 230 may be configured to be engaged with the outer surface of the horizontal pin 220 through movement of the switch in one direction. However, the structure of the locking member 230 may be any structure have.

7 and 8, a moving roller 240 rotatable forward and rearward can be further coupled to the outside of the horizontal pin 220. When the lower end of the supporting members 100 is folded upward, And can be exposed to the lower part.

That is, the lower ends of the support rods 200 are folded upward to reduce the volume with respect to the horizontal pins 220, and then the movement roller 240 can be seated on the floor surface.

In this state, the operator can move the ladder while pushing or pulling the ladder in the advancing direction with the ladder inclined at a certain angle. Since the moving roller 240 rotates to support the ladder, the operator can easily move the ladder to a desired position have.

In addition, the non-skid cap 250 may be coupled to the lower ends of the support rods 200, and the non-skid cap 250 may be made of rubber or the like to increase frictional force with the bottom surface.

When the support members 200 are used, the support members 200 are deployed in both directions on the basis of the support members 100, and the lower ends of the support members 200 can be stably placed on the bottom surface.

On the other hand, when the foot boards 100 are spread with a constant width, the support frames 200 are rotated at the same installation angle and then placed on the floor surface, so that more stable mounting is possible.

The link member 300 is disposed in the other direction of the upper plates 100 opposite to the above-described vertical pins 110, and both longitudinal ends thereof are rotatably coupled to the lower portions of the upper plates 100.

In addition, the link member 300 limits the separation distance so that the front surfaces of the top plates 100 are brought into close contact with each other through the folding operation of the sections, or the top plates 100 are spaced apart from the maximum rotation angle.

The link member 300 for this purpose may be provided through a combination of the first link 310 and the second link 320 arranged horizontally as shown in FIGS.

6 and 9, the first link 310 is rotatably coupled to the lower end of one of the upper plates 100 in the longitudinal direction.

6 and 9, one end of the second link 320 is rotatably coupled to the lower end of the other one of the upper plates 100, and the other end of the second link 320 is connected to one end of the first link 310 And is rotatably coupled.

One end of the first link 310 and the one end of the second link 320 are in close contact with each other in an intersecting manner and the one end of the first link 310 and the end of the second link 320, And a vertical pin 330 for forming the center of rotation is penetratedly coupled.

One end of the second link 320 may be bent in a direction opposite to the vertical rotation center, and may be coupled to one end of the first link 310 so as to be horizontally rotatable.

The first link 310 and the second link 320 are horizontally rotated in the direction of the vertical pin 110 of the upper plates 100 when the front surfaces of the upper plates 100 are horizontally rotated Folded.

On the other hand, when the front surfaces of the upper plates 100 are horizontally rotated in a direction away from each other, they are horizontally rotated in a direction opposite to the vertical pins 110 of the upper plates 100.

The support pins 400 may be further coupled to the lower ends of the vertical pins 330 to additionally support the supports 200 between the lower portions of the link members 300.

A plurality of auxiliary supports 400 may be connected to each other by horizontal pins 430 forming a horizontal rotation center so that the lower ends of the auxiliary supports 400 may be folded upward or unfolded downward.

Here, the auxiliary support 400 may be formed by coupling the upper beam 410 and the lower beam 420, as shown in FIGS.

The upper beam 410 is coupled to the lower end of the vertical pin 330 so that the upper beam 410 can be moved in the same direction as the position of the vertical pin 300.

That is, when the first link 310 and the second link 320 are folded, the first link 310 and the second link 320 are moved in the center direction of the upper plates 100. When the first link 310 and the second link 320 are unfolded, (Not shown).

The lower beams 420 are rotatably coupled to the lower ends of the upper beams 410, respectively, as shown in FIGS. 2 and 3, so that the intervals between the lower beams 420 can be adjusted.

Here, the lower beams 420 may be linearly aligned with the lower ends of the upper beams 410, and may be folded or unfolded in the same direction as the supports 200.

The upper ends of the lower beams 420 may be connected to the lower ends of the upper beams 410 by horizontal pins 430 forming a horizontal rotation center.

That is, the lower beams 410 may be inclined downward to be supported on the mounting surface in use, and may be folded in a corresponding direction when not in use, thereby reducing the volume.

In addition, the horizontal pin 430 may further be coupled with a lock member 440 that locks or unlocks the support pins 200 so that the support pins 200 are maintained in a folded or unfolded state.

The locking member 440 can be switched to the locked or unlocked state by a lock / unlock operation of the switch 441 exposed in the axial direction of the horizontal pin 430. [

The locking member 440 may be configured to be engaged with the outer surface of the horizontal pin 430 through the movement of the switch 441 in one direction. .

A non-slip cap 450 may be coupled to the lower ends of the lower beams 420. The non-slip cap 450 may be made of rubber or the like to increase frictional force with the bottom surface.

As a result, according to the present invention, while the width of the upper plate 100 is widened while being used, the installation angle of the support table 200 is widely adjusted to secure safety during ladder operation, And at the same time, the mounting angle and length of the support table 200 are reduced so that the ease of storage can be secured when not in use.

By using the auxiliary support 400 capable of ensuring the ease of transportation and being able to extend and contract by moving the upper plate 100 and the support 200 in a reduced size with a moving roller to a desired position, It is possible to prevent the support table 200 from being easily conducted.

Although the specific embodiments of the ladder of the present invention have been described so far, it is apparent that various modifications can be made without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be construed as being limited to the embodiments described, but should be determined by the scope of claims of the patent as well as the claims of the patent registration described later.

That is, it should be understood that the above-described embodiments are illustrative and non-restrictive in all aspects and that the scope of the present invention is indicated by the appended claims rather than the detailed description, Ranges and equivalents thereof are to be construed as being included within the scope of the present invention.

100: top plate 110: vertical pin
120: first guide beam 130: second guide beam
140: latch pin 150: hook
200: support frame 210: scaffold
220: Horizontal pin 230: Locking member
231: switch 240: moving roller
250: non-slip cap 300: link member
310: first link 320: second link
321: Bend 330: Vertical pin
400: auxiliary support 410: upper beam
420: lower beam 430: horizontal pin
440: Locking member 441: Switch
450: non-slip cap

Claims

A pair of upper plates disposed in parallel to each other in a state in which the front surfaces thereof are in close contact with each other and the other side of the upper plate is horizontally rotated with respect to the vertical rotation center in one direction,
A pair of supporting members arranged on the upper and lower longitudinal sides and having an upper portion rotatably coupled to a lower portion of the upper plates to adjust a gap therebetween; And
A link member rotatably coupled to both ends of the upper plates in the longitudinal direction so that the front surfaces of the upper plates are brought into close contact with each other through a folding operation of a section of the upper plates or the distance between the upper plates is restricted so as not to exceed the maximum rotation angle Characterized in that it comprises a ladder.

The method according to claim 1,
In one direction of the upper plates,
A vertical pin for forming the vertical rotation center is vertically coupled,
The link member
Wherein the ladder is disposed in the other direction of the upper plates opposite to the vertical pins.

The method of claim 2,
On one side of the top plates on which the link members are disposed,
A hook pin and a hook are respectively installed,
The hook
And the latching pin is engaged or latched by rotation in the vertical direction.

The method according to claim 1,
In the lower portion of the upper plates,
Wherein a first guide beam and a second guide beam, which are curved by a turning radius of the upper plates, are coupled horizontally,
Wherein the first guide beam and the second guide beam are arranged so that,
And the length of the ladder is expanded and contracted while the upper plates are slid by the rotation of the upper plates.

The method according to claim 1,
Wherein the pair of supports comprises:
One or more divided ends horizontally divided along the longitudinal direction are formed,
The split end
Wherein the ladder is vertically folded or unfolded by horizontal pins forming a horizontal rotation center.

The method of claim 5,
At the split end,
Further comprising a locking member for locking or unlocking to maintain the folded or unfolded condition.

The method of claim 5,
On the outside of the horizontal pin,
A transfer roller rotatable forward and backward is further coupled,
The lower end of the moving roller
And the bottom of the pair of supports is exposed downward when folded upward.

The method according to claim 1,
The link member
A first link whose one end in the longitudinal direction is horizontally rotatably coupled to the lower end of one of the upper plates,
And a second link having one end in the longitudinal direction coupled to the lower end of the other one of the upper plates so as to be rotatable in the horizontal direction and one end intersecting with one end of the first link to be horizontally rotatable with reference to the vertical rotation center Features a ladder.

The method of claim 8,
Wherein the first link and the second link are connected to each other,
Wherein the front surfaces of the upper plates are folded while being horizontally rotated in the direction of the vertical rotation center of the upper plates when the front surfaces of the upper plates are in close contact with each other, and the front surfaces of the upper plates are spread in a direction opposite to the vertical rotation center when they are mutually separated.

The method of claim 8,
Wherein one end of the second link
Wherein the ladder extends in a direction opposite to the vertical rotation center, and is coupled to one end of the first link so as to be horizontally rotatable.

The method of claim 8,
At a vertical rotation center of the first link and the second link,
A vertical pin for forming the vertical rotation center is coupled,
At the lower end of the vertical pin,
Further comprising an auxiliary support for further supporting between the pair of supports at a lower portion of the link member.

The method of claim 11,
Wherein the auxiliary support comprises:
One or more divided ends horizontally divided along the longitudinal direction are formed,
The split end
Wherein the ladder is folded or unfolded by a horizontal pin forming a horizontal rotation center.

The method of claim 12,
At the split end,
Further comprising a locking member for locking or unlocking to maintain the folded or unfolded condition.

The method of claim 12,
Wherein the auxiliary support comprises:
An upper beam coupled to a lower end of the vertical pin,
And a pair of lower beams, each of which is rotatably coupled to the lower end of the upper beam and whose upper and lower ends are spaced from each other, is provided.