JP2949610B2 - Ladder attachment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment for a ladder which is mounted on a ladder leaning against a building to stabilize the leaning posture and to prevent damage to the building due to the leaning.

[0002]

2. Description of the Related Art A ladder leaning on a building has a shape in which footrests at arbitrary intervals are provided in a multi-stage shape between two left and right vertical frames, and an upper end portion thereof is applied to a building roof edge or a wall surface. It has a structure in which it leans up and down, and is widely and generally used.

[0003]

The above conventional ladder is
When leaning against a building, if there is a rain gutter on the edge of the building, the gutter protrudes slightly from the roof edge, so the ladder leans against the gutter and holds the gutter, deforming and damaging the gutter. At the same time, the stability of the upper end portion of the ladder that is pressed against the rain gutter is poor, and there is a problem that a side slip easily occurs.

Further, if the upper end of the ladder is leaned against the sloped edge from the side of the sloped roof, the vertical frames on the left and right of the ladder do not contact the sloped edge uniformly. There is a danger that sometimes it will slide and fall down. The present invention provides a ladder attachment that solves the above-mentioned drawbacks of the prior art.

[0005]

Means for Solving the Problems The ladder attachment of the present invention which solves the above technical problem is described as "a ladder provided with a multi-stage footrest bar between right and left vertical frames and orthogonal to the vertical frames,"
Attachment for a ladder to be removably attached, a front end of a support arm protruding forward from the attachment frame is provided with a horizontally long support portion parallel to the footing bar, and a pair of left and right inverted members is provided on the back of the attachment frame. An upper hook hook section and a lower hook hook section are formed of a U-shaped hook and can be hooked to the pair of adjacent hook hooks, and further suspended in the middle of the upper hook hook hook section. The lower leg of the elastic spring is provided with an elastic support hook portion in which a U-shaped hook is suspended, and the upper leg hooked on the
The hanging hook section and the elastic supporting hook section allow the
Structure that is tightly clamped .

The upper and lower leg hooks are hooked on the upper and lower two leg bars at the upper end of the ladder, and the horizontal support portion is projected forward, so that the elastic hook is formed. The portion is stretched and the lower U-shaped hook is hooked on the lower footing bar, and an elastic tension is applied between the lower footing bar and the upper footing bar hook portion by an elastic spring to provide a ladder. On the building, the ladder should be placed against the wall of the building on which the ladder should be rested. It is designed to prevent and use.

[0007]

[Function] The ladder equipped with the ladder attachment of the above structure hooks the upper and lower footrest pier hooks on the upper and lower two footrest piers, and applies the horizontally protruding support part protruding forward to the building wall surface. Attachment frame which is in contact with and hooked on the upper and lower two foot rails is subjected to the tightening tension by the above-mentioned elastic support hook portion, so that the hooking posture with respect to the ladder is stabilized, and the rain gutter on the roof edge is not pressed. , You can lean against a stable posture. And even when leaning against the side sloped edge of the sloped roof, contact with the sloped edge can be avoided and a stable standing posture can be achieved.

Further, in the attachment for a ladder of the present invention, since the above-mentioned elastic support hook portion is present, the vertical interval between the footrest bars of the ladder and the interval between the upper and lower footrest beam hook portions on the attachment side do not match. However, if the footrest bar under the hook is in the inverted U-shaped hook of the lower footrest hook, the attachment does not come off the ladder and the ladder is elastically tightened by the elastic hook. , So that a single attachment can be used for various ladders in the shape of a footrest. And since it can be attached to and detached from the ladder only by hooking on the hook part,
If it is separated and stored and transported freely when not needed, the attachment in the protruding position will not interfere .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to FIGS. FIG. 1 is a perspective view of a ladder attachment 1 according to an embodiment of the present invention, and FIG. 2 is a six-view drawing of the ladder attachment 1.
A footing bar 4 having a required interval between two rigid left and right vertical frames 3 of a normal ladder 2 leaning on a roof or a building,
At the upper end of the ladder 2 provided in a multi-stage shape perpendicular to the vertical frame 3, the ladder 2 is detachably attached only when necessary, and has a horizontally long bearing portion protruding forward as shown in FIG. 7
Is abutted against the wall surface 14 of the building 15 and the roof edge 1
The ladder 2 is prevented from coming into contact with the rain gutter 17 slightly projecting from 6, and can be moved up and down with the leaning posture.

More specifically, the attachment 1 for the ladder is parallel to the left-right direction of the ladder 2 in the mounting posture at the tip of a support arm 6 of a required length protruding forward from the upper middle of an attachment frame 5 which is vertically connected to form a rectangular frame. The horizontally long bearing 7 is provided, and the horizontally long bearing 7 serves as an upper contact portion of the ladder 2 so as to maintain a leaning posture on the building 15.

On the back surface of the attachment frame 5, an upper leg hook portion 9 and a lower leg hook portion 10 each comprising a pair of right and left inverted U-shaped hooks 8 are provided with a required interval L. Further, a coil spring 11 having a predetermined spring constant and having a U-shaped hook 12 at its lower end is suspended between the upper footing hook 9 and the U-shaped hook 12 and the coil spring 11. Is provided. The upper hook pier hook 9 is hooked on the upper pier 4A of the ladder 2 and the lower hook pier hook 10 is hooked on the lower foot pier 4B adjacent to the foot pier 4A. Stop and attach attachment 1
And the U-shaped hook 12 of the elastic hook portion 13 is connected to a coil spring.
11 is stretched and hooked on the lower footrest 4B.
Te, impart elastic tension of the coil spring 11 to the feet Kake桟4A,
A by a pair of left and right upper foot Kake桟U-shaped hook 12 of the hook portion 9 and elastically supported hook 13 to挾着foot Kake桟4A · 4B
The attachment posture of the touchment 1 to the ladder 2 is tightly set.

The attachment 1 of the embodiment described above has the above-mentioned function, and the horizontally long bearing portion 7 functions as the upper bearing portion of the ladder 2. Therefore, if the length of the bearing arm 6 is set to an appropriate amount, the roof 1 There is no danger that the rain gutter 17 protruding from the edge 16 will be pressed and deformed or damaged, and the leaning posture of the ladder 2 ascending and descending to the roof will be physically stable. Then, although not shown, even when the ladder 2 is leaned on the side edge of the sloping roof, by using the attachment 1,
By avoiding contact of the ladder 2 with the side edge of the inclined roof, a stable leaning posture can be achieved.

Further, since the attachment 1 has the elastic support hook portion 13 for tightly setting the attachment 1, the distance L between the upper and lower foot rails 9 and 10 and the foot rail 4A.
Even if the intervals between the four hooks 4B do not match, if the lower foothold bar 4B is in the inverted U-shaped hook 8 of the lower foothold bar hook portion 10, the elastic hook portion 13 does not come off from the ladder 2 without elasticity. Since the attachment 1 can be mounted and set on the ladder 2 without looseness by the tightening force, a single attachment 1 can be shared by the ladders 2 having different intervals between the footrest bars 4A and 4B. When the attachment 1 having the tightening set force is mounted on the ladder 2 laid on the ground, and raised and leaned, there is no possibility that the attachment 1 comes off, slips or shifts from the ladder 2, and the handling of the mounted state is safe. And then
The mounting posture to the ladder 2 is stabilized.

The ladder attachment 1 of the present invention.
The present invention is not limited to the above-described embodiment. The shape of the horizontally long bearing portion 7 and the attachment frame 5 can be changed, and although not shown, the length of the bearing arm 6 can be freely adjusted by any means. There are changes such as attaching a non-slip material to the front surface of the horizontally long bearing portion 7.

[0015]

As described above, the ladder attachment of the present invention has no risk of deforming or damaging the rain gutter of the building on which the ladder is leaning, and the ladder performance and the ladder can be stably stood. While improving safety,
The simplicity of the structure makes it practical for one-touch attachment / detachment, low cost and easy to spread, and has a practical effect of improving the convenience of general ladder users.

[Brief description of the drawings]

FIG. 1 shows an attachment for a ladder according to one embodiment of the present invention, in which (A) is a perspective view and (B) is a side view in a used state.

FIGS. 2A and 2B show six views of the ladder attachment of the embodiment shown in FIG. 1, wherein FIG. 2A is a front view, FIG. 2B is a right side view (the left side view is symmetrical with the right side view), and FIG. Is the rear view,
(D) is a plan view, (E) is a bottom view

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Attachment for ladders 2 Ladder 3 Vertical frame 4A ・ 4B Footrest 5 Attachment frame 6 Bearing arm 7 Horizontal bearing 8 Reverse U-shaped hook 9 Upper footrest hook 10 Lower footrest 11 Coil spring 12 U-shaped Hook 13 brace hook part 14 wall surface 15 building 16 roof rim 17 rain gutter

Claims (1)

(57) [Claims] 1. A ladder attachment which is detachably mounted on a ladder provided with a plurality of step rails perpendicular to the vertical frame between left and right vertical frames, and a support projecting forward from the attachment frame. At the front end of the arm, a horizontal support portion is provided parallel to the footrest bar, and a pair of left and right inverted U-shaped hooks are provided on the back of the attachment frame, and can be hooked to a pair of adjacent footrest bars. The upper and lower leg hook hooks are provided.
At the lower end of an elastic spring suspended in the middle of the upper leg hook hook portion, an elastic hook portion hanging a U-shaped hook is provided, and the upper leg hook hook portion hooked on the leg beam and Brace
With the hook part, it is clamped and clamped to the footrest bar
Attachment for ladders, characterized by the structure of the ladder.