KR200184652Y1 - A ladder having a adjustable leg - Google Patents

Abstract

The present invention relates to a ladder that can be adjusted in height, more specifically, the height of the ladder to adjust the height of the ladder to maintain the flat when the ladder is placed is not flat to increase the ease of use and stability It is about.

The height adjustable ladder of the present invention is a ladder for working in high altitude, when the height adjustment member is installed on the lower end of one or two of the vertical axis installed on both sides of the ladder, when used on uneven ground By maintaining the center of the work is to promote the safety of work.

The present invention as described above, which is installed inside the lower end of the vertically extending ladder, a plurality of coupling members are formed vertically on the surface and the bottom portion is a moving part is connected to the bar in contact with the bottom surface, the coupling of the moving part It is characterized in that it is composed of a braking portion including a fixed portion formed in the member is formed with a coupling projection to limit the shangdong, and flat iron for close contact, separation of the coupling projection and the coupling member of the fixing portion.

According to another feature of the present invention, the lower end surface of the ladder to form a plurality of through holes, it is inserted into the ladder includes a shankdong member having a through hole having the same diameter as the through hole on the surface.

According to another feature of the present invention, a thread is formed on the inner surface of the lower end of the ladder and the bar is coupled to the end and the vertical rod formed on the surface of the lower end is inserted into the lower end.

Description

A ladder having a adjustable leg

The present invention relates to a ladder that can be adjusted in height, more specifically, the height of the ladder to adjust the height of the ladder to maintain the flat when the ladder is placed is not flat to increase the ease of use and stability It is about.

Ladders are often used for work at heights higher. There are many types of ladders, from the ones that are easy to use for individuals to the expensive ladders for work on higher floors. Among the various ladders, the ladders, which are mostly used individually, fix the rods used as a plurality of scaffolds between the vertical shafts located on both sides, and have a structure in which the lengths of the vertical shafts are the same.

These ladders cause the following inconveniences during use. That is, the conventional ladder 10, as shown in Figure 1, because the length of the vertical axis 12 is the same, when used on a flat floor or the ground 16, there is no problem, as shown in Figure 2 If the ground 16 is not uniform, there was a problem that it is difficult to balance the ladder 10. In order to solve such a problem, the ladder member 18 is conventionally used as a wooden coating or a stone. However, the ladder member 10 may not cope properly with the ground condition, and the trap member 18 itself is not uniform. ) Was unstable.

The present invention is devised to solve the above problems, the object of the present invention is to raise the convenience and stability in use by adjusting the height of the ladder to keep flat when the ground on which the ladder is not flat. To provide an adjustable ladder.

Height-adjustable ladder of the present invention for achieving the above object, in the ladder for working in high altitude, is provided with a height adjustment member that can be fine-adjusted at the lower end of one or two vertical shafts installed on both sides of the ladder Therefore, when using on uneven ground, maintain the center of the ladder to promote the safety of work.

1 is a front view of a ladder used in the prior art,

Figure 2 is a ladder using state of Figure 1,

Figure 3 is a side cross-sectional view of one embodiment of a ladder according to the present invention,

4 is a partial side cross-sectional view seen from A of FIG.

Figure 5 is a side cross-sectional view of another embodiment of the present invention,

6 is a partial side cross-sectional view seen from B of FIG. 5, FIG.

7 is a side cross-sectional view of another embodiment of the present invention.

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

10: ladder 12: vertical axis

14: vertical axis 16: ground

18: holding member 20: moving part

21: support bar 22: coupling member

22a: horizontal plane 24: fixed part

26: engaging projection 26a: contact surface

27: pressing surface 28: spring

30: spring 32: vertical axis

34: support bar 36: moving rod

38: fixing hole 40: fixing pin

42: pin member 44: thread,

46: Jijibar

Hereinafter, with reference to the accompanying drawings illustrating a ladder capable of adjusting the height of the present invention in detail.

The present invention relates to the improvement of the ladder, to maintain the safety of work by fine-tuning the end of the ladder when used in the unplanned ground or floor. The ladder of the present invention is characterized in that to install a height adjustment member that can be fine-adjusted on the lower end of one or two of the vertical axis installed on both sides of the ladder.

Hereinafter, with reference to the drawings showing an embodiment of the present invention will be described in detail.

3 and 4 is an embodiment of a ladder according to the present invention. As shown in FIG. 3, the ladder 10 is installed inside the lower end of the vertical axis 12 or 14 of the ladder 10. The moving part 20 in which the plurality of coupling members 22 are formed is located inward of the vertical axis (collectively referred to as 14 for convenience of explanation). The moving part 20 is for substantially adjusting the height of the ladder 10 and is configured to be movable up and down. In addition, a support bar 21 is further attached to the lower end of the moving part 20 to maintain stability upon contact with the ground 16. It is apparent that the support bar 21 can be configured to be separated from each other and coupled with the portion integral with the coupling member 22.

The fixing part 24, which is engaged with the coupling members 22 of the moving part 20 and restrains movement, is also provided at an inner side opposite position of the vertical axis 14. The fixing part 24 has a coupling protrusion 26 protruding toward the front, and the spring 24 is further connected to the inner side of the coupling protrusion 26. The spring 24 is installed so as to act smoothly when the engaging projection 26 moves between the coupling member (22). Although the fixing part 24 is fixed to be impossible to move vertically, it is fixed to be movable horizontally for the movement between the coupling members 22, which will be described later.

As shown in the end of the coupling member 22, a horizontal surface 22a extending horizontally is formed at the lower side, and has a rounded shape toward the upper side. The engaging projection 26 to be matched with this has a rounded shape toward the bottom of the horizontal plane. Therefore, when the coupling member 22 and the coupling protrusion 26 are coupled to each other, the horizontal surface 22a and the contact surface 26a face each other. Therefore, the moving part 20 from which the coupling member 22 protrudes is blocked from moving downward. In order to support the pressing force of the moving part 20, it is essential that the fixing part 24 has sufficient strength and is made of steel.

The engaging projection 26 of the fixing part 24 is further inserted with a spring 28 at the rear. The spring 28 advances the engaging projection 26 forward (in the direction of the engaging member 22) to keep it engaged. Therefore, in the coupled state, the moving unit 20 is fixed to the movement downward.

The fixing part 24 itself moves horizontally toward the side. This is used to move the moving part 20 by separating the engaging projection 26 and the engaging member 22 of the fixing part 24 from each other.

4 is a partial cross-sectional view showing a moving state of the fixing part 24.

As shown, it is installed spaced apart from the support bar 21, a spring 30 is further installed on the side. Usually, the fixing part 24 is kept completely pushed outward by the spring 30. At this time, the outer end of the fixing portion 24 maintains the same surface as the surface of the vertical axis 14 of the ladder. In addition, the engaging projection 26 of the fixing part 24 is coupled to the coupling member 22 as shown in Figure 2 to prevent the movement of the moving part 20.

In this fixed state, in order to release the coupling with the moving part 20, pressing the pressing surface 27 of the fixing part 24 to the side fixing part 24 is to move over the elastic force of the spring (30). Accordingly, as the coupling protrusion 26 is separated from the coupling member 22, the fixing part 20 may be movable. In this state, the user may adjust the height of the moving part 20 to fit the ground 16 or the floor.

5 and 6 is another embodiment of the present invention, the moving rod 36 is slightly spaced inside the vertical axis 32 of the ladder is configured to be movable. In addition, the support bar 34 is coupled to the lower end of the moving rod (36). The support bar 34 may be coupled to and separated from the moving rod 36.

The surface of the moving rod 36 is formed with a plurality of holes at regular intervals. These holes are fixed holes 38 used to adjust the height of the moving rod 36 and are formed through the moving rod 36. In addition, a hole having the same diameter as that of the fixing hole 38 is formed on the surface of the vertical shaft 32.

The user uses the fixing pin 40 to adjust the height of the ladder. That is, after moving the moving rod 36 to protrude as necessary height along the inside of the vertical axis 32, the hole formed in the surface of the vertical axis 32 and the fixing hole 38 of the moving rod 36 to communicate with each other. After matching, the fixed pin 40 is separately inserted and fixed. After the pin member 42 is coupled to the end of the fixing pin 40 to complete the fixing.

FIG. 7 is another embodiment of the present invention, which forms a thread therein and constitutes a moving rod having a thread 44 to fit therein and the height of which can be adjusted by rotating the support bar 46. to be. This has the advantage of strong endurance because the height is easy to adjust and the structure is simple. The moving rod () should be a circular rod to smoothly move up and down, and a circular structure having a thread formed on the surface of the vertical shaft 32 should also be inserted.

In the above structures, the moving part, the moving rod, and the fixing part preferably have a height-adjusting structure, and preferably have an end structure such as a rectangle or a circle.

As described above, according to the present invention, when the ground on which the ladder is placed is not flat, there is an advantage of increasing convenience and stability in use by adjusting the height of the ladder to keep it flat.

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that the present invention may be modified or changed within the spirit and scope of the present invention. something to do.

Claims (4)

In the ladder for working in high altitude, Height-adjustable member is provided at the lower end of one or two of the vertical axis is installed on both sides of the ladder to adjust the height of the ladder, characterized in that to maintain the center of the ladder when used on uneven ground. The method of claim 1, The height adjustment member, a plurality of coupling members are formed vertically on the surface and the bottom portion is a moving portion to which the bar is in contact with the bottom surface is connected, and a fixed portion formed with a coupling protrusion for limiting the shangdong by being coupled to the coupling member of the moving portion And, the height adjustable ladder characterized in that it consists of a braking portion including a spring for contacting, separating the engaging projection and the coupling member of the fixed portion. The method of claim 1, The height adjustment member, the height adjustment is characterized in that it comprises a plurality of through holes formed on the bottom surface of the ladder, the hole is formed into the inside of the ladder having a through hole having the same diameter as the through hole on the surface ladder. The method of claim 1, The height adjustment member, the thread is formed on the inner surface of the lower end of the ladder is inserted into the lower end of the bar is coupled to the end and the rod is coupled to the end of the vertical rod formed of the screw thread on the surface is adjustable height adjustable ladder.