KR20190123629A - Overturn Preventing device for ladder - Google Patents

Abstract

The present invention relates to a ladder falling prevention device to prevent a ladder from falling down used when building a ship. The ladder falling prevention device includes a falling prevention means to prevent a foldable ladder from falling down. The falling prevention means includes: a U-shaped connector installed on centers of a first to a fourth frame; a first falling prevention connection means wherein both terminals thereof are connected to the U-shaped connector installed on the first frame and the third frame; a second falling prevention connection means wherein both terminals thereof are connected to the U-shaped connector installed on the second frame and the fourth frame; a falling prevention bar wherein a first and a second ring unit formed on an upper side of both ends thereof are coupled to centers of the first and the second falling prevention connection means; an automatic bar belt penetrating a third and a fourth ring unit formed on a lower side of both ends of the falling prevention bar; an automatic bar handle which is installed on one side of the automatic bar belt, and adjusts a length and tension; and an automatic bar ring unit formed on both ends of the automatic bar belt, and provided with a ring to fix the foldable ladder on a floor. A ladder is prevented from falling down, and work can be performed without limitations on place and space.

Description

Overturn Preventing device for ladder

The present invention relates to a ladder fall prevention device, and more particularly, to a ladder fall prevention device to prevent the fall of the ladder used in shipbuilding.

In general, when a ship is built, a worker often works on a ladder, such as installation of a decorative material or painting.

At this time, the worker loses the center of gravity due to an unsafe posture while working on the ladder, or a worker accidentally collides with the ladder, causing the ladder to fall and the worker falling down. Due to these safety issues, the actual worker is to climb up the ladder to work, and during the work, other assistants are required to work in a pair of two people holding and fixing the ladder to prevent the ladder from falling down. It is true.

However, when working in pairs of two people, there is a problem of increasing labor costs because there must always be a secondary worker, and there is a problem that it is not efficient because two people have to do what the actual worker can do without the secondary worker. In addition, even if there is a secondary worker, a situation in which the ladder is turned over due to the mistake of the secondary worker has occurred. To solve this problem, a device for preventing the ladder from falling has been developed.

The prior art about the apparatus for preventing the fall of a ladder is disclosed by following <patent document 1>.

The prior art disclosed in <Patent Document 1> installs a certain length of outrigger legs (conduction guards) on the side of a ladder so that a single pair of work can be performed during the ladder work, and the lever and lever of the rod shape are operated. The locking link connects the outrigger legs to constrain the rotation of the outrigger legs, thus supporting the ladder firmly and reliably. Thus, the effect of preventing the fall of the ladder is expected.

Republic of Korea Utility Model Registration No. 20-0479669 (Registered Feb. 17, 2016) (Ladder prevention device of ladder)

However, the fall prevention device of the ladder according to the prior art has the advantage of preventing the fall by supporting the ladder firmly and stably, but there was a disadvantage that the passing worker collides with the fall prevention device of the ladder to fall the ladder. .

In addition, there is a disadvantage that the ground is unstable or the step is generated or can not be used or limited in the narrow working space, such as ships.

The present invention has been proposed to solve all the problems occurring in the prior art as described above, and an object thereof is to provide a ladder fall prevention device that can prevent the fall of the ladder even in an environment in which a worker frequently passes.

Another object of the present invention is to provide a ladder fall prevention device that can be used by fixing the ladder in the working space is narrow or the passage is narrow, such as ships because the ground is unstable.

In order to achieve the object as described above, the ladder fall prevention device according to the present invention includes a folding ladder and the fall prevention means for preventing the folding ladder falls. The foldable ladder may include a first ladder provided with a plurality of step bars in a line between the first frame and the second frame arranged at a predetermined width, and a plurality of third frame and the fourth frame arranged at a predetermined width. A second ladder having a step bar arranged in a row, and formed to be rotatable, a folding portion and both ends connecting the first ladder and one end of the second ladder are fixed to the first frame and the third frame by a hinge; A hinge shaft is formed at a center thereof and includes a rotatable gap prevention unit, wherein the fall prevention unit includes a U-shaped connector installed at a middle of the first frame to the fourth frame, and both terminals of the first frame and the first terminal. First fall prevention connecting means connected to the U-shaped connector installed in the three frame, U-shaped both terminals are provided in the second frame and the fourth frame Second fall prevention connecting means connected to the connection, fall prevention bar is fastened to the middle of the first fall prevention connection means and the second fall prevention connection means, the first ring portion and the second ring portion formed on both ends, Automatic bar belt penetrating the third and fourth ring portion formed on both ends of the fall prevention bar, the automatic bar handle is installed on one side of the automatic bar belt, and adjusts the length and tension, and the automatic bar belt It is formed on both ends, and characterized in that it comprises an automatic bar ring portion is fastened to the ring for fixing the folding ladder on the floor.

According to the ladder fall prevention apparatus according to the present invention, it is possible to prevent the fall of the ladder even in the environment of frequent workers, it is possible to perform the work without the risk of ladder falling, there is an effect that can prevent the accident caused by ladder falling. .

In addition, since the ground is unstable, a step may occur or the ladder may be fixed and used in a narrow working space such as a ship, thereby preventing the ladder from falling and allowing work to be performed without restrictions in place and space.

1 is a perspective view of a ladder falling prevention device according to a preferred embodiment of the present invention.
2 to 3 is a perspective view of the fall prevention means of the ladder fall prevention device according to a preferred embodiment of the present invention.
4 is a configuration diagram of a foot bracket of a ladder fall prevention apparatus according to a preferred embodiment of the present invention.
5 to 6 is a state diagram using the ladder fall prevention apparatus according to a preferred embodiment of the present invention.

Hereinafter, a ladder fall prevention device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the configuration of a ladder falling prevention apparatus according to a preferred embodiment of the present invention.

As shown in Figure 1, ladder fall prevention device 10 (hereinafter referred to as fall prevention ladder) according to a preferred embodiment of the present invention is a ladder 100 and fall prevention means 200 to prevent the ladder 100 to fall. It includes.

The ladder 100 is a folding ladder, and includes a first ladder 110, a second ladder 120, a folding portion 130, and a gap preventing portion 140.

Since the four components 110 to 140 listed above are the minimum components implementing the technique proposed by the present invention, the four components 110 to 140 will be briefly described.

The first ladder 110 is made of either aluminum or iron, and the first frame 111 and the second frame 112 are disposed with a predetermined width, and a plurality of step bars 150 are arranged in between. Is installed.

The second ladder 120 is made of any one of aluminum or iron, and the third frame 121 and the fourth frame 122 are arranged with a predetermined width, and a plurality of step bars 150 are arranged in between. Is installed.

The folding unit 130 has a hinge fixed in the middle so as to be rotatable, and connects one end of the first ladder 110 and the second ladder 120. Because the folding unit 130 can be folded or unfolded due to the folding portion 130, it can be used as an A-type ladder as well as an H-type ladder, it is preferable that the width of the folding portion 130 can be used as a uma ladder. .

The gap preventing part 140 is fixedly installed at both ends of the first frame 111, the third frame 121, the second frame 112 and the fourth frame 122 by a hinge, It is possible to rotate by forming the hinge axis. The gap preventing unit 140 is folded upward so as not to interfere with the first and second conduction preventing connection units 220 and 221 to be described later, and presses the automatic bar belt 240 to be described later, the ladder 100 is opened. To prevent them.

At this time, the gap preventing unit 140 is shown in Figure 2, but only one may be installed.

Ladder 100 configured as described above can be configured to correspond to a variety of standards, such as width and thickness and work limit height.

2 to 3 is a perspective view of the fall prevention means 200 of the ladder fall prevention device according to an embodiment of the present invention.

As shown in Figures 2 to 3, the fall prevention means 200 of the ladder fall prevention device 10 according to a preferred embodiment of the present invention is a U-shaped connector 210, the first fall prevention connection means 220 , Second fall prevention connection means 221, fall prevention bar 230, automatic bar belt 240, automatic bar handle 241, automatic bar hook 242, hook 243, quick link 250 , Ring bracket 260, first bottom fixing means 270, and second bottom fixing means 271.

As shown in FIG. 2, the U-shaped connector 210 forms a hole at one side, and is installed in the middle of the first to fourth frames 111, 112, 121, and 122 in a coupling method of a conventional bolt and nut in the formed hole. . The U-shaped connector 210 may be detachable, and may be configured to correspond to various ladder standards.

The first fall prevention connection unit 220 is connected to the U-shaped connector 210 installed at both terminals of the first frame 111 and the third frame 121, respectively.

The second fall prevention connecting means 221 is connected to the U-shaped connector 210, both terminals are provided in the second frame 112 and the fourth frame 122, respectively.

Although the first and second fall preventing connecting means 220 and 221 are shown as a chain in the drawing, the present invention is not limited thereto, and an appropriate one of the known connecting means such as a general wire may be selected and used. In addition, the first and second fall prevention connecting means (220,221) can be manufactured according to the length when the width of the ladder to be installed is different, it is easily coupled and separated with the U-shaped connector 210 by forming both terminals in a ring shape It is desirable to be able to. In addition, the first and second conduction prevention connecting means 220 and 221 are slid downward when the ladder 100 is folded, and when the ladder 100 is unfolded, the first and second conduction connection means 220 and 221 do not interfere with the gap prevention unit 140.

The fall prevention bar 230 is formed in a bar shape having a predetermined width, and serves to distribute the load of the ladder 100 uniformly when the auto bar belt 240 to be described later is pressed. Then, the fall prevention bar 230 forms the first ring portion 231 and the second ring portion 232 on both sides of the upper end, and the third ring portion 233 and the fourth ring portion 234 on the lower side of both ends. ) And connects the first and second fall prevention connecting means 220 and 221 and the automatic bar belt 240 to the ladder 100. That is, the first ring portion 231 and the second ring portion 232 formed on both ends of the fall prevention bar 230 are intermediate between the first fall prevention connecting means 220 and the second fall preventing connecting means 221. The parts are fastened to each other, and the automatic bar belt 240 penetrates to the third ring portion 233 and the fourth ring portion 234 formed at both ends of the fall prevention bar 230.

At this time, the first ring portion 231 and the second ring portion 232 is coupled to both ends of the fall prevention bar 230 by the conventional coupling method of the ring and the groove, a known ring means such as a carabiner or a quick link It is connected to the first non-conductive connecting means 220 and the second non-conductive connecting means 221 using. In addition, the third ring portion 233 and the fourth ring portion 234 are coupled to both ends of the fall prevention bar 230 by the conventional coupling method of the buckle and the groove, the automatic bar belt 240 is coupled through. .

The automatic bar belt 240 is coupled to penetrate through the third ring portion 233 and the fourth ring portion 234 formed at both ends of the fall prevention bar 230 and is made of a durable and elastic material such as polyester. Is formed.

As shown in FIG. 3, the automatic bar handle 241 is installed at one side of the automatic bar belt 240 and serves to adjust the length and tension of the automatic bar belt 240 by pressing. That is, the automatic bar handle 241 presses the automatic bar belt 240 by applying a force up and down as in the conventional automatic bar usage, and pulls the inner handle to release the automatic bar belt 240.

Auto bar ring portion 242 is formed at both ends of the auto bar belt 240, respectively, the ring 243 is provided so as to fix the ladder 100 to the grooved ground or grating (grating), respectively . Here, each ring 243 is shown as a quick link in the figure, it is possible to apply a variety of known ring means such as a binner. Accordingly, each of the hooks 243 provided in the auto bar ring portion 242 secures the ladder 100 to the floor to prevent falling.

Quick link 250 is a means for connecting the automatic bar ring portion 242 to the ring bracket 260 which will be described later, is fastened to each of the automatic bar ring portion 242 and each ring bracket 260.

Here, the ring bracket 260 is a bracket having a circular shape, through-holes of different sizes are formed, and the respective quick links 250 and the first and second bottom fixing means 270 and 271 to be described below are fastened and coupled. When the first and second bottom fixing means 270 and 271 are installed or adjusted, the ring bracket 260 serves to reduce the interference between the first and second bottom fixing means 270 and 271 and the automatic bar belt 240. .

The first bottom fixing means 270 is coupled to any one of the ring bracket 260, and serves to fix the ladder 100 to the bottom of the metal material.

The second bottom fixing means 271 is coupled to any one of the ring brackets 260, and serves to fix the ladder 100 to the bottom of the metal material.

The first and second bottom fixing means 270 and 271 are provided with any one of a conventional mag switch or an ON / OFF magnet, and are known in the art to control a magnetic force by varying a switch S formed thereon. Detailed description thereof will be omitted. Accordingly, the first and second bottom fixing means 270 and 271 secure the ladder 100 to the floor to prevent falling.

4 is a configuration diagram of a foot bracket of a ladder fall prevention apparatus according to a preferred embodiment of the present invention.

As shown in Figure 4, the foot bracket 300 is coupled to the two brackets in a conventional coupling method of bolts, nuts, is detachably installed at each end of the first to fourth frames (111, 112, 121, 122). Thus, the foot bracket 300 can prevent the entry of the ladder 100 during the grating upper operation. In addition, the foot bracket 300 may be configured to correspond to the specifications of the various ladders.

The tilting bracket 310 is coupled to the bottom of the foot bracket 300 by a conventional protrusion and a groove or a screwing method, and grounds the four ends of the ladder 100 regardless of whether the bottom surface is curved or inclined or stepped. Rotation or inclination can be adjusted within a range to allow full contact from In addition, although not shown in the drawings, the tilting bracket 310 is configured to be able to adjust the height, it is preferable that a tilting lever or a height lever is provided to enable the tilt or height adjustment. Rotation or inclination adjustment and height adjustment can be implemented using any of the well-known techniques applied to the table or wheels, so a detailed description is omitted.

5 to 6 is a state diagram using the ladder fall prevention apparatus according to a preferred embodiment of the present invention.

As shown in Figure 5, the worker will use the fall prevention ladder 10 in the grooved workplace such as grating.

The worker moves the fall prevention ladder 10 to the corresponding position and then unfolds it.

The operator fastens each of the hooks 243 provided in the automatic bar hook portion 242 between the grating grooves, and applies the pressure to the automatic bar belt 240 using the automatic bar handle 241 to apply the ladder 100. Use fixed.

At this time, the ladder 100 does not enter the grating groove due to the foot bracket 300.

In addition, although not shown in the drawings, even in a stepped terrain, the operator uses the height adjustment or tilting function of the tilting bracket 310 to completely contact the ladder 100 to the floor, the hook 243 fixed to the floor ladder 100 may be used.

Afterwards, when the work is finished and the worker moves to another position, the worker releases the pressure applied to the automatic bar belt 240 by using the handle installed inside the automatic bar handle 241, and releases the hook 243 between the grating grooves. Release to move to the next work location conveniently and quickly.

As shown in Figure 6, the worker will use the fall prevention ladder 10 in the workplace made of metal material.

The worker moves the fall prevention ladder 10 to the corresponding position and then unfolds it.

The worker attaches the first and second bottom fixing means 270 and 271 connected to the automatic bar belt 240 to the floor, and the switch S formed on the first and second bottom fixing means 270 and 271 clockwise or clockwise. Turn in the opposite direction.

As the switch S is variable, the first and second bottom fixing means 270 and 271 generate a magnetic force and are fixed to the floor.

Afterwards, the worker applies the pressure to the automatic bar belt 240 using the automatic bar handle 241 to fix the ladder 100.

At this time, although not shown in the drawings, even if the terrain is stepped by the operator using the height adjustment or tilting function of the tilting bracket 310 to completely contact the ladder 100 to the floor, the first and second floor fixing means (270, 271) It can be fixed to the floor using a ladder (100).

When the work is finished and moved to another position, the worker releases the pressure applied to the automatic bar belt 240 by using the handle installed inside the automatic bar handle 241, and the first and second floor fixing means 270 and 271 attached to the floor. The switch (S) formed at the top of the variable to eliminate the magnetic force.

After releasing the first and second floor fixing means 270 and 271 from the floor, the worker can move to the next work place conveniently and quickly.

Therefore, the ladder fall prevention apparatus according to the present invention can perform the work without the risk of falling of the ladder, can prevent the accident due to the ladder fall, can work without restrictions according to the place and space.

As mentioned above, although the invention made by the present inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

10: ladder fall prevention device 100: ladder
110: first ladder 111: first frame
112: second frame 120: second ladder
121: third frame 122: fourth frame
130: folds 140: gap prevention
150: a plurality of step bars 200: fall prevention means
210: U-shaped connector 220,221: first and second fall prevention connecting means
230: fall prevention bar 231,232: first and second ring portion
233,234: third and fourth ring portions 240: automatic bar belt
241: automatic bar handle 242: automatic bar hook portion
243: loop 250: quick link
260: ring bracket 270, 271: first and second bottom fixing means
300: foot bracket 310: tilting bracket

Claims (3)

Folding ladders; And
Fall prevention means for preventing the folding ladder from falling over; And
The folding ladder,
A first ladder provided with a plurality of step bars in a line between the first frame and the second frame arranged at a predetermined width;
A second ladder provided with a plurality of step bars in a line between the third frame and the fourth frame arranged at a predetermined width;
A folding portion formed to be rotatable and connecting one end of the first ladder and the second ladder; And
Both ends are fixed to at least one of the one side of the first frame and the third frame or one side of the second frame and the fourth frame, the hinge axis is formed in the center includes a rotatable gap prevention portion,
The fall prevention means,
U-shaped couplings respectively installed in the middle of the first frame to the fourth frame;
First anti-conduction connecting means connected to the U-shaped connector provided at both the first frame and the third frame;
Second anti-conduction connecting means connected to both terminals of the U-shaped connector installed at the second frame and the fourth frame;
A fall prevention bar having a first ring portion and a second ring portion formed at an upper side of both ends thereof respectively fastened in the middle of the first fall prevention connection means and the second fall prevention connection means;
An automatic bar belt penetrating through third and fourth ring portions formed at both ends of the fall prevention bar;
An automatic bar handle installed at one side of the automatic bar belt and adjusting a length and a tension; And
Each of the automatic bar belt is formed at both ends, ladder falling prevention device comprising an automatic bar ring portion is fastened to the ring to secure the folding ladder to the floor. In claim 1,
Quick links fastened to the auto bar ring portions formed at both ends of the auto bar belt;
Ring brackets fastened to the quick links, respectively;
First bottom fixing means coupled to any one of the ring brackets and fixing the folding ladder to a floor; And
Coupled with any one of the ring bracket, ladder falling prevention device further comprises a second bottom fixing means for fixing the folding ladder to the floor. The method of claim 2, wherein the folding ladder,
A foot bracket installed at each end of the first frame to the fourth frame and preventing entrance; And
Ladder fall prevention device installed on the foot bracket, characterized in that it comprises a tilting bracket having a tilting function.

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