JPH09324591A - Ladder free from toppling on slant-stepped land - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure safety for a foothold against unevenness or difference in level at the ground surface and to make installation easy by a method wherein a front support leg of a three-legged ladder is made accommodative to turning toward the right and the left and also made available for being split into two to change the three-legged structure into a four-legged structure. SOLUTION: Front support legs 4 are united together with magnetic plates 12 and 13 and serve as a part of a three-legged ladder when used at a flat ground, and the front support legs 4 are made to form two legs of a four-legged ladder, with the magnetic plates 12 and 13 bring separated from each other, when used at a slope or an uneven ground. The front support legs 4 are softly attached to a leg plate 7 with a front support leg shaft 8, forming a joint for making movement toward the right and the left available. Joint sleeves 6 are provided separately at the right and the left and fixed to an upper bed 3 with leg shafts 5 inserted respectively therein, and thereby a joint for forward and rearward movement is formed. By virtue of these two joints, the front support legs 4 function as a support that moves in a range of 360 deg. toward the front and the rear, and the right and the left. A cross- shaped joint is constructed at each of the front support legs 4 with a toe joint shaft 9 and a stop plate shaft 11 inserted respectively into a toe frame 10 and a stop plate 15 of the front support leg 4, and thereby the front support legs 4 are made capable of holding the ground correctly even through the angle of opening varies widely for the front support legs.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] Work at heights higher than the height of a person is one of the tools that use a ladder. However, this ladder is more likely to fall and lose its life or become a victim of a disabled person. The people are still constantly occurring. The slope-less tipping ladder of the present invention is an invention of a tipping ladder in which the front support leg of a tripod ladder is divided into two legs as necessary to transform into four legs, and which can safely and quickly respond to any slope. .

[0002]

2. Description of the Related Art Conventional ladders have a fear of falling each time they are used, and for example, whether the scaffolding that is stable for performing work at a high place or pruning of a house is horizontal or a ladder. Dangerous unless is horizontal. If there is a slight step,
It was dangerous to rock back and forth and left and right.

A tripod ladder appears to solve the above-mentioned swing, but the tripod ladder certainly does not swing at a step, but the center of gravity of the tripod ladder always depends on one for two front legs. For legs, the risk of falling is very high.

In particular, the higher the ladder is, the larger the inclination angle becomes even if the step is small. If a ladder with a height of 3 m and a width of 50 cm is fixed at a step height of 5 cm on the right leg, the ladder will tilt 10 times to the left by 50 cm at the step height. To solve this problem, the lower the ladder width is, the wider it opens in a c-shape and the height is 3m. It will double the weight. In addition, auxiliary feet are provided to widen the foot width to prevent falls. There was also an improved type in which the hind legs of the main body were able to always be kept horizontal due to expansion and contraction, etc. However, it was troublesome to use every time it was moved due to inconvenience and trouble.

The conventional tripod ladder easily falls on three legs, and the four-leg ladder swings easily, and the accessories for preventing this are troublesome and difficult to use, and are light in any case. Easy to use. It is a conventional ladder that cannot be said to be safe.

[0006]

The present invention is intended to remedy many of the disadvantages of conventional ladders described above and will not tip over rough terrain under any adverse conditions, no matter how inclined the ladder may be. Easy to install. Light and strong. In addition, the purpose is to provide a safe slope-less tipping ladder.

[0007]

In the ladder of the present invention, the one that the rising step has is called the main body, and the legs of the main body are called the rear legs. The freely movable front leg is named the front support leg. These two front legs are
It is possible to separately move 360 degrees freely, and it is also possible for the rear legs of the main body to move instantly according to the movement of the front support leg. This bizarre acrobat ladder that can perform a strange acrobatic movement is able to unconditionally fix the front support leg to a scaffold on uneven terrain in the direction to fall. The slanted tipless ladder developed to make the scaffold automatically move strangely in accordance with the opening of the front support leg and the movement of the main body, and the scaffolding can also quickly and firmly fix the scaffold on uneven terrain. .

[0008]

The ladder of the present invention is used as a tripod ladder when used on a flat land, but changes to a quadruped ladder when used on a stepped land such as a sloping ground or an uneven ground. This four-legged ladder can move in exactly the same way as a person's limbs regardless of the height of the ground, and can find a stable place. In other words, when a person puts his right hand forward, his right shoulder goes forward, and in response to this movement, his left hind leg moves forward, and at the same time he moves his body left and right to move forward. In this way, just by moving one front support leg, the ladder itself moves the whole body to move in accordance with the human movement, and the front support leg supports the body with human hands. A tilt-less tipping ladder that was made so that the front support legs could be fixed freely.

Further, what is required of the ladder is that it is a lightweight and strong ladder, and the ladder of the present invention does not matter how high the ladder width of the main body of the climbing step is 50 cm. It is a ladder according to the present invention. In the conventional tripod ladder, the rear foot width of the main body is an important issue, and it is as wide as the foot width is 4 m and the foot width is lower, and it is about 3 times as large as the 1.50 m width. There is a risk of falling unless the foot width is widened as the height increases. In this way, the wider the foot width, the heavier the weight and double the
It is three times as heavy. The ladder of the present invention does not change the foot width even when it is raised, and it is 2
It is possible to stop with a weight that is one-third, large and one-third or less. A slanted tipless ladder that was invented for the purpose of lightweighting because it can be used for a long time unless it is light and it is difficult to replace trees such as pruning trees that move in narrow spaces one after another.

[0010]

INDUSTRIAL APPLICABILITY As described above, the ladder of the present invention has no fear of tipping over, such as horizontal adjustment and auxiliary feet, regardless of the height of the ground or uneven ground. The front support leg and the rear foot of the main body always respond to uneven ground without worrying about the height of the scaffold,
By establishing a safe scaffold on the optimum ground by its own movement, the movement of the main body can immediately respond to the safe body shape according to the movement of the tripod and quadrupedal ladder. According to the present invention, the slope-less tipping ladder according to the present invention is provided so as to prevent the anxiety of the ladder from being settled on any sloped land.

[0011]

Embodiments of the present invention will be described below. The embodiment shown in FIG. 1 is a side view of a slope-less tipping ladder, and the present invention is, as the name implies, a slope-less tipping ladder whether it is a slope or a high step. Let us give the following example to the experiment. First, the front support leg 4. Set the left foot of the to 50 cm higher and then the rear foot of the body 1. Even if his right foot was placed 30 cm higher, a 60 kg big man could climb and work well without falling. Also, the front support leg 4. Also the rear legs of the body 1. Only left 30cm
I tried a work experiment by setting a scaffold at a high place. At this time, the ladder was so inclined that I couldn't climb it because it was tilted about 20 degrees to the right, but I was able to work on this ladder. As described above, the ladder of the present invention can promptly respond to any sloping surface unevenness or step, and can build a safe figure to ensure no fall. It is a tilt-less tipping ladder of the present invention.

A test was conducted by pruning a garden tree with many steps on a slope. In the garden with a pond and waterfall, there were many stones and the steps were so severe that it was very difficult for a conventional ladder. The ladder of the present invention could be easily set up on a stone slope having uneven steps. No matter how many times you move, you can quickly and easily stand up at a desired place without having to consider the footing conditions and steps, so it is a ladder-less tipping ladder that increases work efficiency and allows you to work with peace of mind.

In the inclined non-inverted ladder shown in the figure, the front support leg 4 is a one-legged tripod ladder in which 12.13 are bonded by a magnetic plate. However, for use on slopes, the magnetic plate of 12.13 shown in the figure is released to make two legs and the rear legs of the main body 1. Available with a four-legged ladder. The front support leg 4 is a front support leg shaft 8 which is softly attached to the leg plate 7 to form a left-right joint. The nuclear joint cylinders 6 are separated into right and left, and the leg shafts of 5 are inserted to make fixed joints in the heavens 3 for forward and backward movement. These two joints made it possible for the front support leg to function as a strut that moves 360 degrees back and forth and left and right. In addition, 9 and 11 are inserted into the foot frame 10 and stop plate 15 of the front support leg to provide a universal joint that allows the front and rear legs to freely move back and forth with a cruciform joint, no matter how the opening angle of the front support leg changes. Can always be grasped accurately. Since this stop plate always supports the front support leg parallel to the ground accurately, there is no concern that the front support leg will slip and fall all the way down. It is a tilt-less tipping ladder that has a wide range of motion and can be freely used as a pillar in the direction where the center of gravity of the ladder is applied. 1 when moving or storing
2.13. Magnetic plates of the main body magnetic plate 14. Attached to the front support leg 4. And body 1. It is to store this as a unit.

[0014]

As described above, according to the present invention, no matter how high or low the ground is, or uneven ground, there is no adjustment of the height or adjustments for the fall of the auxiliary foot. Therefore, without worrying about the height of the scaffold, the front support leg and the rear foot of the main body always respond to uneven ground, and do not set a safe scaffold on the most enemy land by its own movement, and it is safe according to the movement of the four-legged ladder The movement of the main body can respond to various body types. According to this operation, the inclined non-overturning ladder according to the present invention is constructed so as to prevent the anxiety of the ladder from being settled on any sloping land.

[Brief description of drawings]

FIG. 1 is a side view of a four-legged ladder in which a front supporting leg of the present invention is separated.

FIG. 2 shows a magnetic plate 12.13. Side view of the tripod ladder bonded to.

FIG. 3: 12.13. Magnetic plate integrated into 1
4 is a front view of the main body magnetic plate of FIG.

[Explanation of symbols]

 1. Main body hind legs 2. Climbing stage 3. Tenba 4. Front support leg 5. Axis 6. Nuclear joint tube 7. Leg plate 8. Front fulcrum shaft 9. Toe joint axis 10. Toe frame 11. Stopper shaft 12. Magnetic plate 13. Magnetic plate 14. Main body magnetic plate 15. Stop board

Claims (2)

[Claims] According to the present invention, there is provided an inclined stepless ladder in which a front support leg of a tripod ladder is adapted to a left-right rotational movement, and is separated into two and can be transformed into a four-leg ladder. 2. A nuclear joint tube having two front support legs is separated into left and right, and freely operates together with the front support leg shaft to form a fall-prevention prop in any sloped land in which the center of gravity is applied. It is capable of exerting a supporting force.