KR20090053455A - A ladder - Google Patents

A ladder Download PDF

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Publication number
KR20090053455A
KR20090053455A KR1020070120308A KR20070120308A KR20090053455A KR 20090053455 A KR20090053455 A KR 20090053455A KR 1020070120308 A KR1020070120308 A KR 1020070120308A KR 20070120308 A KR20070120308 A KR 20070120308A KR 20090053455 A KR20090053455 A KR 20090053455A
Authority
KR
South Korea
Prior art keywords
ladder
height adjustment
stopper
vertical frame
height
Prior art date
Application number
KR1020070120308A
Other languages
Korean (ko)
Inventor
장영수
Original Assignee
장영수
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 장영수 filed Critical 장영수
Priority to KR1020070120308A priority Critical patent/KR20090053455A/en
Publication of KR20090053455A publication Critical patent/KR20090053455A/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/02—Extending means
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/06—Securing devices or hooks for parts of extensible ladders
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/081—Rungs or other treads comprising anti-slip features
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/42—Ladder feet; Supports therefor
    • E06C7/426—Height adjustable supports for receiving both ladder feet
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/42—Ladder feet; Supports therefor
    • E06C7/44—Means for mounting ladders on uneven ground

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

More specifically, it relates to a height-adjustable ladder that enables stable horizontal installation regardless of ground conditions.

Features of the present invention,

In the ladder having a height adjustment member, the height adjustment member,

A height adjusting leg which is inserted in a sliding manner through the lower end of the vertical frame and has a locking portion on an inward or outward surface; A stopper pivotally coupled to the vertical frame, the stopper having a relative locking portion selectively engaged with the locking portion; The contact member for pushing the stopper to be in close contact with the engaging portion; consisting of.

Ladder, height adjustment, height adjustment

Description

Adjustable height ladders {A LADDER}

The present invention relates to a height adjustable ladder.

More specifically, it relates to a height-adjustable ladder that enables stable horizontal installation regardless of ground conditions.

In general, since the ladder is supported on the ground, stable installation is possible only when the ground conditions are parallel.

If the ground is uneven, the ladder can only be supported at an angle, which may cause a safety accident such as the ladder to overturn. .

1 is a representative view of the domestic utility model registration No. 20-347538. According to this, the conventional ladder is slide-inserted the height adjusting leg 20 in the lower portion of the ladder body (10, 10 '), and drilled in the ladder body (10, 10') and the height adjusting leg 20, respectively After matching a specific hole among the plurality of holes (11, 21), it is configured to be able to fix the position of the height adjustment leg 20 by penetrating the fixing pin (13).

However, this conventional ladder is inconvenient in height adjustment work, because the height adjustment, before the operation must be adjusted in advance, and if the balance is not balanced to go through several adjustment process.

In addition, a hook hook 13a is formed at one end of the fixing pin 20 to prevent the fixing pin 20 from being arbitrarily separated from the holes 11 and 21, and has an incision 13b to allow elastic shrinkage. This is so configured that it is easily removed from the holes (11, 21) when necessary, but if the fixing pin 20 is a metal will cause a problem that the elastic shrinkage action is almost impossible, the fixing pin 20 is In the case of plastic, elastic shrinkage is possible, but the strength is weak, so it will not be a desirable structure.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, the main object of the present invention is to provide a ladder that can be adjusted in height so that easier and finer control in adjusting the height of the ladder.

The main features of the present invention for achieving the above object are as follows.

<Feature 1>

In the ladder having a height adjustment member, the height adjustment member,

A height adjusting leg which is inserted in a sliding manner through the lower end of the vertical frame and has a locking portion on an inward or outward surface; A stopper pivotally coupled to the vertical frame, the stopper having a relative locking portion selectively engaged with the locking portion; It is a ladder having a height adjusting member, characterized in that consisting of; a close contact member for pushing the stopper in close contact with the engaging portion.

<Feature 2>

The engaging portion and the relative engaging portion is a ladder having a height adjusting member, characterized in that the teeth are opposite to each other.

<Feature 3>

The lower end of the stopper is a ladder having a height adjusting member, characterized in that the pressing portion for pressing the stopper to rotate.

<Feature 4>

The ladder having a height adjustment member, characterized in that it further comprises a non-slip member rotatably coupled to the lower end of the height adjustment member.

<Feature 5>

It is a ladder having a height adjustment member, characterized in that it further comprises that the horizontal system is installed on any one footrest is installed on the vertical frame.

<Feature 6>

Is installed on the vertical frame is a ladder having a height adjusting member, characterized in that it further comprises a safety member for selectively holding the engaging portion of the height adjustment leg.

<Feature 7>

The safety member,

A housing fixed to the vertical frame and having a key hole and a locking hole formed on one surface thereof; A ratchet bar installed in the housing so as to be able to move forward and backward, and having a ratchet caught on a locking portion of the height adjusting leg at a front end thereof; An elastic body for elastically pushing the ratchet bar toward the locking portion; The ladder is formed integrally with the ratchet bar, and has a height adjusting member, comprising a key bar selectively caught by the locking hole.

<Feature 8>

The contact member,

Ladder having a height adjusting member, characterized in that consisting of a spring interposed between the vertical frame and the bottom of the stopper.

Ladder according to the present invention is easy and easy to adjust the height, fine adjustment of the height is possible, and the height adjustment member is robust has the effect of significantly reducing the risk of safety accidents.

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

2 is an overall perspective view of the ladder according to the present invention having a height adjustment function, Figure 3 is an exploded perspective view of the main part of the ladder according to the present invention, Figure 4a is a sectional view of the main part of the ladder according to the present invention, the height adjustment leg Figure 4b is a state diagram and a stopper, Fig. 4b is a cross-sectional view of the main portion of the ladder according to the present invention, the height adjustment leg and the stopper is a state diagram spaced apart, Figure 5 shows the installation state of the ladder according to the invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete, and those skilled in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims.

According to the drawings, the present invention is a height adjustment member from a ladder consisting of a pair of vertical frame 100 of the hollow type and the footrest 200 is installed at a predetermined interval between the pair of vertical frame 100, 600 is more installed.

The height adjusting member 600 is composed of a height adjusting leg 300, the stopper 400, the close contact member 430 and the like.

The height adjustment leg 300 is inserted in a sliding manner through the lower end of the vertical frame (100).

The height adjustment leg 300 is provided with a engaging portion 310 in the form of a plurality of teeth on a part or all of the inner surface.

The lower end of the height adjustment leg 300 is preferably a non-slip member 320 is installed.

The non-slip member 320 is a pin coupled to the lower end of the height adjustment leg 300, as shown in Figure 3 is rotatable state, a plurality of sliding on the bottom to prevent slipping from the ground (地面) The prevention protrusion 321 is formed.

The stopper 400 serves to fix the height adjustment leg 300.

2 to 4b, the pin (P) is rotatably coupled to the vertical frame (100), and has a multi-stage serrated shape to selectively engage with the catching portion (310). Has 410.

Here, the stopper 400 receives a force to be in close contact with the engaging portion 310 of the height adjustment leg 300 by the contact member 430.

In addition, the lower end of the stopper 400, the pressing portion 420 for pressing the stopper to rotate. The pressing portion 420 has a shape that protrudes outward so that it is easy to press the foot of the worker.

On the other hand, the close contact member 430 is composed of a spring interposed between the vertical frame 100 and the lower end of the stopper 400.

In addition to the above configuration, the present invention further includes a safety member 500 installed in the vertical frame 100 to selectively hold the engaging portion 310 of the height adjustment leg 300.

The safety member 500 is a safety device in preparation for not firmly fixing the height adjustment leg 300 due to the failure of the stopper 400, the configuration is as follows.

A housing 510 fixed to the vertical frame 100 and having a key hole 511 and a locking hole 512 formed on one surface thereof; A ratchet bar 520 installed in the housing so as to be able to move forward and backward, and having a ratchet 521 at the front end thereof, which is caught by the engaging portion 310 of the height adjusting leg 300; An elastic body 530 elastically pushing the ratchet bar 520 toward the locking part 310; It is formed integrally with the ratchet bar 520, and consists of a key bar 522 that is selectively caught by the locking hole 512.

In addition, in the present invention, it is preferable that a level gauge 210 is installed on a particular foothold among the plurality of footholds 200 so as to visually check the horizontal installation of the ladder.

Looking at the installation process of the ladder of the present invention having the above configuration as follows.

If the ground of the ladder is installed in the present invention is smooth, the use of the height adjustment leg 300 is not necessary. Therefore, the height adjustment leg 300 may be used in a state in which the vertical frame 100 is embedded.

On the other hand, when the ground on which the ladder is installed is inclined or stepped, it is necessary to adjust the height of the height adjusting leg 300 for horizontal installation of the ladder.

5, for example, when the left side of the ladder has a low ground and the right side of the ladder has a high deviation, the height adjusting leg located on the left side of the ladder should be pulled out by the height deviation.

Looking at the process, from the state of Figure 4a, when the pressing portion 420 of the stopper 400 is pressed the contact member 430 is compressed, the stopper 400 is the upper portion of the stopper 400 from the starting point (P) 4b Rotate clockwise as in.

Then, since the stopper 400 is spaced apart from the height adjusting leg 300, the height adjusting leg 300 can be freely moved up and down, and at this time, the exposure length of the height adjusting leg may be appropriately adjusted.

If the exposure length of the height adjustment leg 300 is properly adjusted, the foot was released from the pressing part 420. Then, as the stopper 400 rotates counterclockwise in the drawing by the contact member 430 to be in close contact with the height adjusting leg 300, the locking portion 310 and the stopper 400 of the height adjusting leg 300 are closed. As the relative locking portion 410 is assembled with each other, the height adjustment leg 300 is fixed.

On the other hand, if a problem occurs in the fixing force of the height adjustment leg 300 by the stopper 400, there is a risk that a safety accident may occur, as shown in Figure 4a, the height adjustment leg 300 of the key bar 522 of the safety member 500 When the ratchet bar 520 is advanced by operating in the direction, the ratchet 521 provided at the tip of the ratchet bar 520 is bound to the engaging portion 310 so as to firmly hold the height adjusting leg 300. Even if a problem occurs in the stopper 400, the safety member 500 can hold the height adjustment leg 300, thereby preventing a safety accident in advance.

1 is an example of a conventional ladder having a height adjustment function

2 is an overall perspective view of a ladder according to the present invention having a height adjustment function

Figure 3 is an exploded perspective view of the main part of the ladder according to the present invention

Figure 4a is a cross-sectional view of the main portion of the ladder according to the present invention, the height adjustment leg and the stopper is a state diagram

Figure 4b is a cross-sectional view of the main portion of the ladder according to the present invention, the height adjustment leg and the stopper spaced apart state diagram

Figure 5 is an installation state of the ladder according to the invention

<Explanation of symbols for the main parts of the drawings>

100. Vertical frame 200: scaffold

210: level 300: height adjustment leg

400: stopper 430: contact member

500: safety member

Claims (8)

In the ladder having a height adjustment member, The height adjustment member, A height adjusting leg which is inserted in a sliding manner through the lower end of the vertical frame and has a locking portion on an inward or outward surface; A stopper pivotally coupled to the vertical frame, the stopper having a relative locking portion selectively engaged with the locking portion; A ladder having a height adjusting member, characterized in that consisting of; a close contact member for pushing the stopper in close contact with the engaging portion. The method of claim 1, Ladder having a height adjustment member, characterized in that the engaging portion and the engaging portion is in the shape of a tooth opposite to each other. The method of claim 1, The lower end of the stopper, the ladder having a height adjustment member, characterized in that the pressing portion for rotating the stopper is provided. The method of claim 1, Ladder having a height adjusting member further comprises a non-slip member rotatably coupled to the lower end of the height adjusting member. The method of claim 1, Ladder having a height adjustment member, characterized in that it further comprises that the horizontal system is installed on any one footrest is installed on the vertical frame. The method of claim 1, The ladder having a height adjustment member is installed on the vertical frame further comprises a safety member for selectively holding the engaging portion of the height adjustment leg. The method of claim 6, wherein the safety member, A housing fixed to the vertical frame and having a key hole and a locking hole formed on one surface thereof; A ratchet bar installed in the housing so as to be able to move forward and backward, and having a ratchet caught on a locking portion of the height adjusting leg at a front end thereof; An elastic body for elastically pushing the ratchet bar toward the locking portion; A ladder having a height adjustment member formed integrally with the ratchet bar, consisting of a key bar selectively caught in the locking hole. The method of claim 1, wherein the contact member, Ladder having a height adjustment member, characterized in that consisting of a spring interposed between the vertical frame and the bottom of the stopper.
KR1020070120308A 2007-11-23 2007-11-23 A ladder KR20090053455A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070120308A KR20090053455A (en) 2007-11-23 2007-11-23 A ladder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070120308A KR20090053455A (en) 2007-11-23 2007-11-23 A ladder

Publications (1)

Publication Number Publication Date
KR20090053455A true KR20090053455A (en) 2009-05-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070120308A KR20090053455A (en) 2007-11-23 2007-11-23 A ladder

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011055863A1 (en) * 2009-11-03 2011-05-12 (주)디엔피테크 Leveling device of ladder
KR101437266B1 (en) * 2013-01-28 2014-09-02 김행남 Horizontal level adjustable ladder
CN105221064A (en) * 2015-10-23 2016-01-06 苏州飞华铝制工业有限公司 A kind of locking device of combination ladder
CN105221063A (en) * 2015-10-23 2016-01-06 苏州飞华铝制工业有限公司 A kind of locking device of combination ladder
KR20210085361A (en) * 2019-12-30 2021-07-08 안예원 A ladder apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011055863A1 (en) * 2009-11-03 2011-05-12 (주)디엔피테크 Leveling device of ladder
KR101437266B1 (en) * 2013-01-28 2014-09-02 김행남 Horizontal level adjustable ladder
CN105221064A (en) * 2015-10-23 2016-01-06 苏州飞华铝制工业有限公司 A kind of locking device of combination ladder
CN105221063A (en) * 2015-10-23 2016-01-06 苏州飞华铝制工业有限公司 A kind of locking device of combination ladder
CN105221064B (en) * 2015-10-23 2017-01-04 苏州飞华铝制工业有限公司 Locking device of combined ladder
CN105221063B (en) * 2015-10-23 2017-01-11 苏州飞华铝制工业有限公司 Novel locking device of combined ladder
KR20210085361A (en) * 2019-12-30 2021-07-08 안예원 A ladder apparatus

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E902 Notification of reason for refusal
E601 Decision to refuse application