JPH0821174A - Attachment for ladder - Google Patents

Abstract

PURPOSE:To complement short leg length on one side by mounting an attachment on a ladder, and to ensure the safety of the ladder when the ladder is leaned against the upper section of a step at the stepped section of stairs or the upper section of the surface of a slope and used. CONSTITUTION:An attachment for a ladder consists of the combination of an attachment main section 1 composed of a bearing shaft 7, which has a U-shaped lower stepping crosspiece hook section 5, into which the stepping crosspiece 22 of the ladder 20 is entered, at an upper end and in which a grounding base section 8 is mounted at a lower end and shaft length is adjusted freely by a jack shaft 11, and a clamping connecting member 2 having an inverted U-shaped upper stepping crosspiece hook section 6 at an upper end, having a turnbuckle body 4 in an intermediate section and being connected to the upper section of the attachment main section 1. The upper and lower stepping crosspiece hook sections 5, 6 are engaged with the stepping cross piece 22, installed onto the ladder 20, and clamped and fixed by the turnbuckle body 4 while the bearing shaft 7 is employed as a complement leg on the short leg length side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder attachment to be attached to a leg portion of a ladder when the ladder is leaned against the steps of stairs, on an inclined surface, or on an uneven surface. It is a thing.

[0002]

2. Description of the Related Art A ladder used for leaning against a building or the like and moving up and down has a structure in which two vertical frames are provided on the left and right, and stepping bars at arbitrary intervals are provided in a multi-tiered manner. It has a structure in which the two legs are placed on the ground or on the floor and leaned against them, and are widely used.

[0003]

The conventional ladder described above is
Assuming the usage conditions of leaning on flat ground etc., the leg length of the legs is equal to the left and right, so place the left and right legs respectively on the sloped ground or steps on stairs. When leaning on one leg, the leg length of one leg is insufficient and the leg cannot be leaned or leaned.Therefore, place an appropriate mount on the lacking part and place one leg on the mount, or use an appropriate bar. The material is tied to the vertical frame to supplement the lacking part and lean against it.

Therefore, when the conventional ladder is leaned against such an inclined ground and used, it is troublesome to take a supplementary measure for the leg length, and the stability of the ladder is often lacking in the supplementary leg length measure in the previous term. Furthermore, if careful consideration is not given to the measures for supplementing the leg length, there is a risk that the ladder may tip over or fall sideways during use. The present invention eliminates the above conventional difficulties,
(EN) Provided is a ladder attachment that can be used by leaning a ladder with stability in a sloping land.

[0005]

The attachment for a ladder according to the present invention which solves the above technical problem is "a ladder having a multi-stage ladder provided between a pair of left and right vertical frames and having a foot rail crossing the vertical frames,
A support shaft which is a detachable attachment for a ladder, has a U-shaped lower foot rail hook portion for inserting the foot rail at the upper end, has a ground base at the lower end, and has an adjustable axial length. The main body of the attachment, and the upper U-shaped hook bar hooked to the foot rail, the hook portion of the upper U-shaped hook at the upper end, the lower end is a tightening connecting member to connect to the attachment main unit, A turnbuckle portion for tightening is provided in the middle, and the upper foot hanging rail hook portion and the lower foot hanging rail hook portion are hooked on the different foot hanging rails, and the turnbuckle portion is used for tightening and fixing. The support shaft compensates for the short leg length of the lower end portion of the vertical frame, and leans the ladder against an inclined surface or the like. "

[0006]

In the ladder attachment of the present invention having the above-mentioned structure, when the ladder is leaned against different steps of the stairs by leaning the legs or leaning on the sloping ground, the ladder attachment is attached vertically to the side where the leg length is insufficient. Attach it to the lower end of the frame, adjust the axial length of the support shaft appropriately, and put the grounding base of the lower end on a step etc., the insufficient leg length part will be supplemented by the support shaft, and the ladder will lean against a stable posture. You can

Since the shaft length of the supporting shaft can be freely adjusted, the supporting shaft can be freely set depending on the inclination / step condition of the ground, floor surface, etc. on which the ladder is leaned, and the hook portion of the upper leg of the inverted U-shaped hook described above. And the U-shaped lower leg rail hooks are tightly fixed between the leg rails, so the mounting position of the ladder attachment to the ladder is physically extremely stable, and the support shaft is used as a leg on the short leg side. Function properly and safely.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A detailed description will be given below with reference to FIG. 1 showing an embodiment of the present invention. That is, the ladder attachment of the present invention is an attachment that is detachably attached and set to a lower end portion of a ladder 20 of a normal shape in which a pair of parallel vertical frames 21 are provided with multi-stepped foot bars 22 orthogonal to the vertical frames 21. It is a combination of the tightening connection members 2 of the attachment main portion 1 which will be described in detail below.

More specifically, the attachment main portion 1 has a U-shaped lower footrest rail hook portion 5 for receiving the footrest rail 22 from the upper end and an earth base 8 at the lower end. It has an elongated columnar body consisting of 7. That is, the support shaft 7 has a slide tube portion including an outer tube 9 and an inner tube 10, which are fitted to each other and can be slid in the axial direction, in the upper half,
The tube length of the slide tube portion can be freely adjusted by a locking pin having a set screw 12, and the inner tube 10 forms a jack body extending the jack shaft 11 downward, and the outer tube 9 and the inner tube 10 are connected to each other. Support shaft 7 by jack shaft 11
Forming the shaft part of.

At the upper end of the outer tube 9, a lower foot rail 5 with U-shaped hooks 19 arranged in parallel is fixedly mounted, and at the lower end of the jack shaft 11, a hinge pin 14 is connected by a hinge. Is provided with a plate-shaped grounding base 8, the axial length L is adjusted and set by a fitting set of the outer pipe 9 and the inner pipe 10, and the rotary shaft of the jack shaft 11 is used to finely adjust the axial length L. The axial length L between the bottom surface of the U-shaped hook 19 of the lower foot rail hook portion 5 that receives 22 and the lower surface of the ground base portion 8
However, it can be set extremely accurately.

On the other hand, the tightening connection member 2 is composed of two bar members 1
5 are connected in the longitudinal direction and set with a set screw 12, and a tightening bar 3 having an upper U hook hook 6 of an inverted U-shaped hook at the upper end and a turnbuckle body 4 having hooks 16A and 16B at both ends. The hook bar 16A at the upper end is hooked and connected to the hook pin 17 at the lower end of the tightening bar 3 to form the tightening connecting member 2, and the setting position of the bar member 15 is selected by the set screw 12 to select the tightening bar. By adjusting and setting the length of 3, the total length of the tightening and connecting member 2 can be adjusted.

The ladder attachment comprising the attachment main portion 1 and the tightening connection member 2 described above has, for example, the ladder 20 in the step 25 of the stairs 24, and the vertical frame 2 in the step 25.
When the leg portion 23 at the lower end of 1 is laid up and used for lifting, the attachment main member whose axial length is adjusted to the footrest bar 22A at the lowermost stage of the vertical frame 22 on the side where the leg length of the leg portion 23 is insufficient. Part 1 is attached, and the foot rail 2 is attached to the lower foot rail hook portion 5.
2A is put in, and the grounding base 8 is moved to the lower step 25
Then, the shaft length L is finely adjusted by the jack shaft 11 to set the ladder 20 in a normal standing posture, and the support shaft 7 is made to function as a supplementary leg of the vertical frame 21 of the leg length insufficient portion.

Then, the upper footrest bar hook portion 6 of the tightening connection member 2 of which the length has been adjusted in advance is hooked onto the upper footrest bar 22 and fixed to the attachment main part 1 in the mounted posture. The lower hook 16B of the turnbuckle body 4 connected to the tightening bar 3 is hooked on the edge of the lower foot rail hook part 5 of the attachment main part 1 to stop the ladder 2
Set to 0, and tighten by adjusting the rotation of the turnbuckle body 4, and by the tightening tension, the lower leg hook 5
The fixing posture of the attachment main part 1 is fixed and the attachment posture of the attachment main part 1 is fixed.

The above-mentioned embodiment has the above-described action, and the attachment main portion 1 is mechanically stably mounted and fixed to the ladder 20 by the tension of the tightening and connecting member 2, and the support shaft 7 is The leg 2 of the vertical frame 21 on one side of the ladder 20
Stairs 2 because it functions stably as a supplementary leg for the short leg length of 3
There is no risk of the ladder 20 laterally slipping or falling when the leg portion 23 is raised and lowered in the step 25 of 4 different steps and can be safely used. Then, the support shaft 7 and the tightening connection member 2
Since a length adjustment set can be made, it can be used widely for stairs with different step heights, sloped ground with different slope conditions, etc., and can also be used for ladders with different intervals for the foot rails 22. Further, since the attachment main part 1 which can be freely connected and disconnected and the tightening connection member 2 are combined, it is convenient to carry and store, and can be used for either the left or right vertical frame 21 of the ladder 20.

The attachment for a ladder according to the present invention is
The present invention is not limited to the above-mentioned embodiment, and for example, the jack shaft 11 and the ground base 8 are freely jointed to secure the directional freedom of the ground base 8, and although not shown, the attachment main part 1 is attached to the vertical frame 21 by a band. There are changes such as tightening and fixing and further improving the safety of the ladder 20 in the front-back direction. The present invention is not only used on the stairs of the above-described embodiment, but also widely used on a mountainous area where the unevenness changes drastically, an uneven ground, an inclined surface, etc., as shown in FIG.

[0016]

As described above, the attachment for a ladder of the present invention secures stability of the ladder and improves safety when the ladder is leaned against stairs, inclined surfaces, uneven surfaces, etc. In addition, it eliminates the troublesome measures for supplementing the leg length of the inclined surface, etc., and has the versatility to match the different inclined surfaces and stair step differences etc. individually, and improves the convenience of ladder users. There are various effects.

[Brief description of drawings]

FIG. 1 shows a ladder attachment according to an embodiment of the present invention, (A) is a perspective view of its constituent members, and (B) is a perspective view of its usage state.

FIG. 2 is a front view showing another example of use of the attachment for a ladder of the present invention.

[Explanation of symbols]

 1 Attachment main part 2 Tightening connection member 3 Tightening bar 4 Turnbuckle body 5 Lower foot hanging beam hook part 6 Upper foot hanging beam hook part 7 Support shaft 8 Grounding base 9 Outer pipe 10 Inner pipe 11 Jack shaft 12 Set screw 13 Jack Handle 14 Hinge pin 15 Bar material 16A ・ 16B Hook hook 17 Hook pin 19 U-shaped hook 20 Ladder 21 Vertical frame 22 Leg hook 23 Leg 24 Stair 25 step

Claims (1)

[Claims] 1. A U-shape into which a foot attachment rail is inserted, which is detachably attached to a ladder in which a foot attachment rail orthogonal to the vertical frame is provided between a pair of left and right vertical frames in a multi-tiered manner. -Shaped lower footing rail hook part at the upper end, grounding base at the lower end, and an attachment main part consisting of a support shaft whose axial length is adjustable, and an inverted U-shaped upper part hooked on the footholding rail It comprises a tightening connecting member having a foot hook cross hook part at the upper end and connecting the lower end to the attachment main part, and a turnbuckle part for tightening is provided in the middle of the tightening connect member, and the upper foot hook hook is provided. Part and the lower footrest rail hook portion are hooked on the footrest rails in different steps, and tightly fixed by the turnbuckle portion, and by the support shaft,
An attachment for a ladder, characterized by supplementing the lack of leg length at the lower end of the vertical frame and leaning the ladder against an inclined surface or the like.