JPH0524899U - Auxiliary leg of the ladder - Google Patents

Abstract

(57) [Summary] [Purpose] When leaning a ladder, even if there is an inclination or a step at the feet such as stairs or a slope, the ladder can be leaned straight and stable when viewed from the front. [Structure] A leg 4 is inserted into a tubular body 3 along a side post 2 of a ladder 1 so that the leg 4 can be extended downward, and the leg 4 is fixed to the tubular body 3 while being extended by an appropriate length. A stopper 5 is provided. On the side surface of the cylindrical body 3, rods 7 which are inserted into the hollow step bars 6 at the bottom of the ladder 1 are provided substantially horizontally at the same intervals as the step bars 6. The cylindrical body 3 is attached to the side pillars 2 of the ladder 1 at appropriate intervals by inserting the rod bodies 7 into the step bars 6 by an appropriate length.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an auxiliary leg for a ladder that is used when the foot of the ladder is unstable on a slope, stairs, etc. when leaning the ladder and performing various operations.

[0002]

[Prior Art]

 When performing various tasks using the ladder, such as leaning a ladder against the outer wall of a house and drawing an advertisement with paint, or attaching an advertising signboard, where the foot of the ladder has slopes or steps such as slopes or stairs Sometimes became. In such a case, if you lean the ladder as it is, the ladder will tilt laterally and become unstable, so if you put a stone of an appropriate size under the side pillar where the foot of the ladder becomes lower, I adjusted to stand straight.

[0003]

[Problems to be solved by the device]

 However, if a padding such as a stone is placed under one of the side pillars of the ladder as described above, the padding will be misaligned and the ladder will wobble while working on the ladder. There was a risk of falling. Therefore, another worker had to firmly support the ladder below, which hindered the improvement of work efficiency.

In addition, even when trying to lean the ladder at the most convenient position for work, there is a rising part of the stairs or a depression just at the foot of one of the side pillars of the ladder, and the ladder can be safely leaned at that position. There were times when I couldn't. In such a case, it was necessary to shift the ladder a little to the side and lean against it, and the worker had to work in an unstable position with the hand reaching horizontally on the ladder.

Therefore, the present invention has been made based on the above-mentioned circumstances, and even if there is a slope, a step, a depression, or the like such as a slope or stairs at the bottom of the foot, the ladder is set at the most convenient position. The purpose is to provide an auxiliary leg for the ladder that can be leaned to a standing position and does not require another operator to firmly support the ladder underneath, which can contribute to improving work efficiency.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the auxiliary leg of the ladder according to the present invention is such that the leg body is inserted so that it can be extended downward in a cylindrical body extending along the outside of the side pillar of the ladder, and the leg body has an appropriate length. A stopper is provided to fix it in the extended state, and a plurality of rods to be inserted into the hollow ladders of the ladder are projected almost horizontally on the side surface of the cylindrical body, and the intervals of the rods are set to the same intervals as the aforementioned ladders. It is characterized by

[0007]

[Action]

 The auxiliary leg of the ladder according to the present invention is constructed such that a plurality of rods projecting from the side surface of the cylinder are inserted into the hollow pedestal at the bottom of the ladder from the outside of the side pillar, so that the outside of the side pillar is attached to the bottom of the ladder. Install it along the line. By inserting the rod protruding from the side surface of the cylinder into the crosspiece by an appropriate length, the distance between the side pillar and the cylinder and leg outside the side pillar is adjusted. The length of the leg extending downward from the side pillar is adjusted by appropriately extending the leg inserted into the cylinder downward and fixing it with a stopper.

[0008]

【Example】

 Hereinafter, the auxiliary leg of the ladder according to the present invention will be described in detail. The auxiliary leg of the present invention is inserted into the cylindrical body 3 along the outside of the side pillar 2 of the ladder 1 so that the leg body 4 can be extended downward, and is fixed in a state where the leg body 4 is extended by an appropriate length. A stopper 5 is provided, and a plurality of rods 7 to be inserted into the hollow step bars 6 of the ladder 1 are provided on the side surface of the cylindrical body 3 so as to project substantially horizontally at the same intervals as the step bars 6 described above.

The tubular body 3 is a rectangular steel tube having a rectangular cross section, and the length (depth) of the long side is substantially equal to the depth of the side pillar 2, and the length of the tubular body 3 is somewhat longer than the distance between the step bars 6. I am doing it. The leg body 4 is a rectangular steel tube that is slightly smaller than the cylinder body 3 and can be just fitted and inserted into the cylinder body 3. The leg body 4 has a length about twice that of the cylinder body 3 and swings to the lower end protruding below the cylinder body 3. A movable grounding part 8 is provided.

As a stopper 5 for immovably fixing the leg body 4 in a state where the leg body 4 is properly extended to the cylinder body 3, the leg body inside the cylinder body 3 is screwed from the outside of the cylinder body 3 as a stopper 5. Three thumbscrews abutting on the cylinder 4 are provided at substantially equal intervals in the longitudinal direction of the cylindrical body 3. A plurality of (two in this embodiment) rods 7 protruding from the side surface of the cylindrical body 3 are formed by welding a small diameter round steel pipe which can be inserted into the hollow step bar 6 of the ladder 1 to the side surface of the cylindrical body 3. The length is somewhat longer than the distance between the side pillars 2 and 2, and the distance between the rods 7 and 7 is almost equal to the distance between the step bars 6 and 6.

Further, a stopper 9 is attached to each rod 7. The retainer 9 includes a ring 10 having an outer diameter larger than the inner diameter of the step rail 6 and loosely fitted to the rod body 7, and a thumbscrew 11 screwed onto the ring 10 from the outer peripheral side to abut the rod body 7. The rod 7 is fixed at an appropriate position.

The auxiliary leg of the present invention is constructed as described above, and an example of its use will be described below. Figure 1 shows the case where the ladder 1 is leaned against a slope, and the auxiliary legs are attached to the lower part of the side pillar 2 which is the downhill side of the ladder 1, and the leg 4 is extended downward by an appropriate length. , It is a method of leaning a ladder straight on the outer wall of a house.

Specifically, first, the rod body 7 is inserted from the outside into the hollow step bar 6 at the lower part of the side pillar 2 on the downhill side by an appropriate length. Here, one retainer 9 is loosely fitted in advance on the base end side (the cylinder body 3 side) of each rod 7. Further, one retaining device 9 is fitted to the tip of the rod 7 protruding from the side pillar 2 on the upper side of the slope. Then, each retainer 9 is moved to a position where it comes into contact with the outer surface of the side column 2, and the thumbscrew 11 is tightened. Although the retainer 9 is shown in the side column 2 in the drawing, it may be brought into contact with the outside of the side column 2. Then, each rod 7 is fixedly fixed to the ladder 1. Therefore, the cylindrical body 3 which is integral with the rod body 7 is also fixed immovably along the side pillar 2 on the downhill side of the ladder 1.

Next, each stopper 5 is loosened, the leg 4 is extended downward by an appropriate length, and the ground contact portion 8 of the leg body 4 and the ground contact portion 8 of the slope upper side pillar 2 remain on the ground. Adjust the ladder 1 so that it stands vertically when viewed from the front. In that state, each stopper 5 is tightened back to fix the leg 4 to the cylinder 3.

When the auxiliary legs are attached and adjusted as described above, the ladder 1 is leaned upright at a position most convenient for work such as a wall surface of a house when viewed from the front, and an advertisement is drawn on the wall surface. Perform necessary work such as installing advertising billboards.

In addition, when the ladder 1 is leaned against the feet of one of the side pillars 2 and is just positioned on the rising surface of the stairs or in a local depression, it becomes unstable as shown in FIG. When attaching the to the ladder 1, the cylinder 3 and the leg 4 are attached to the lower side pillar 2 of the stairs at an appropriate distance, and below the leg 4, a rising surface of the stairs and a local depression are formed. Try not to be located. That is, the rod 7 is inserted into the step rail 6 by an appropriate length, and is fixed by the retainer 9 as it is. Then, adjust the leg 4 by extending it to an appropriate length, and lean the ladder 1 upright to perform the necessary work.

It should be noted that the auxiliary leg of the present invention can be practically used because the auxiliary leg becomes almost immovable with respect to the ladder 1 only by inserting the rod body 7 into the step bar 6 without using the retainer 9. Further, it is desirable to fix the rod body 7 to the ladder 1 by the retaining device 9 in order to enhance the safety.

[0018]

[Effect of the device]

 As described above, the auxiliary leg of the ladder according to the present invention allows the plurality of rods projecting from the side surface of the tubular body to be inserted into the hollow step rails at the bottom of the ladder from the outside of the side pillars, thereby ensuring that the ladder is completely secured. Easy to install.

In addition, even if the foot of the ladder is a slope or stairs, the auxiliary leg of the present invention adjusts the length of the leg extending downward from the side pillar and contacting the ground according to the inclination or step of the ladder, and You can lean straight up. Moreover, since the auxiliary leg of the present invention is firmly attached to the ladder, there is no fear that the ladder will wobble laterally even if no one is supporting the lower part of the leaning ladder.

Further, in the auxiliary leg of the present invention, the rod body protruding from the side surface of the tubular body is inserted into the cross rail by an appropriate length to laterally separate it from the side pillar by an appropriate distance, and Since the legs can be attached, the legs can be grounded and the ladder can be supported so as to stand vertically, avoiding the rising parts of the stairs and local depressions that tend to be unstable.

Therefore, by using the auxiliary leg of the present invention, even if the foot is not horizontal or flat, such as a slope or stairs, the ladder is leaned straight to the most convenient position from the front and the necessary work is performed. Can be performed efficiently and safely.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an auxiliary leg of a ladder according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view of a retainer.

FIG. 4 is a use state diagram of the auxiliary leg of the present invention.

FIG. 5 is a front view of a main part showing another example of use of the auxiliary leg of the present invention.

[Explanation of symbols]

 1 Ladder 2 Side Pillar 3 Cylindrical Body 4 Leg Body 5 Stopper 6 (Hollow) Step Rail 7 Bar Body

Claims (1)

[Scope of utility model registration request] 1. A leg (4) is fitted into a tubular body (3) extending along the outside of a side pillar (2) of a ladder (1) so that the leg (4) can be extended downward, and the leg (4) is suitable. A plurality of rods (7) to be inserted into the hollow step bars (6) of the ladder (1) on the side surface of the tubular body (3) by providing a stopper (5) that is fixed in a state of being extended by a certain length.
An auxiliary leg for a ladder, characterized in that the rods (7) project substantially horizontally, and the intervals of the rods (7) are the same as the intervals of the step bars (6).