JP2899864B2 - Ladder attachment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is directed to a ladder which is mounted on a building or a columnar structure and which is raised and lowered to stabilize the standing posture and prevent the building from being damaged by the leaning. The present invention relates to an attachment for a ladder used for facilitating height work performed on a ladder on which the ladder stands.

[0002]

2. Description of the Related Art A ladder leaning on a building or a three-dimensional structure,
It has a structure in which footrests at arbitrary intervals are laid horizontally in a multi-stage shape between two vertical frames on the left and right. Is performed,
Widely used in general.

[0003]

The above-mentioned conventional ladder is
When the building is used leaning against a corner or column, the protruding part of the corner enters the space between the vertical frames and hits the footrest bar. It stops. Therefore, the leaning posture becomes unstable, and it is difficult to ascend and descend or work at high places, which is dangerous. In addition, when performing bay window construction or side wall construction, etc. in a posture that leans against the building side wall, the spacing suitable for the construction cannot be set between the ladder and the building, so the construction must be done in an unreasonable posture. This is often not possible, making construction difficult and inefficient, as well as dangerous.

When a conventional ladder is leaned against a building, if a rain gutter is present at the edge of the building, the rain gutter slightly protrudes from the roof edge. As a result, the rain gutter is deformed or damaged, and the stability of the upper end portion of the ladder which is pressed against the rain gutter is poor, and there is a problem that a side slip easily occurs.

Further, when the upper end of the ladder is leaned against the sloped edge from the side of the sloped roof, the left and right vertical frames do not uniformly contact the sloped edge, so that the leaning posture becomes unstable, and It is difficult to remove and sometimes there is a danger of skidding and falling. The present invention provides an attachment for a ladder that solves the above-mentioned conventional problems.

[0006]

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,"
A ladder attachment that can be detachably attached, a ladder attachment portion, a pair of leaning members that protrude forward from the ladder attachment portion at a required mutual interval, and that have a contact portion for leaning against a building or the like at the tip. With a bracket,
Between the pair of leaning brackets, a building receiving space for receiving a building corner or the like is provided .
The ladder mounting part is a pair of left and right
Lower two-stage inverted U-shaped hook and elastic U-shaped hook that hooks on the footrest
The first invention of `` a structure equipped with a hook on a mounting frame, ''

The ladder attachment is also provided with a ladder mounting portion, a triangular leaning bracket having an upper side and a hypotenuse protruding forward from the ladder mounting portion, and the leaning bracket includes the upper side portion. And detachably attached to any of the oblique sides, protruding forward from the leaning bracket, and a separate pair of bracket arms having a leaning abutting portion at the tip is provided, and the The protrusion length up to the leaning contact part can be set freely , and the ladder is attached
The part is a pair of left and right
The inverted U-shaped hook and the elastic U-shaped hook
Structure provided on mounting frame ".

[0008] That is, the ladder attachment of the first invention is intended to allow the ladder to stably rest on an outside corner of a building or a columnar object, and to receive a building between a pair of leaning brackets protruding forward. In the space, a protruding part such as a protruding corner is put, and the contact part at the tip of the bracket is made to abut on the intersection wall surface etc. at the protruding corner to maintain two-point contact. In order to stabilize, a mode of a rotatable contact portion that makes line / surface contact with the wall surface is adopted.

In the ladder attachment of the second invention, the protruding length of the bracket arm is freely set by selecting the upper side and the oblique side of the upright bracket protruding from the ladder. Is characterized by a structure in which a required space can be freely set between the leaned wall surface and the ladder by abutting against the wall surface.

[0010]

The ladder attachment according to the first aspect of the present invention, when leaning against a corner or a columnar structure of a building where walls intersect and project a corner, inserts the projecting corner or the like into the receiving space. , A pair of protruding leaning abutting parts are brought into contact with the
Since the point abutment can be maintained, the leaning position of the ladder is stabilized. And the attachment for the ladder of the second invention,
The projecting length of the leaning abutting portion protruding forward can be set freely, so that a space suitable for required high-place work can be set between the building or the like on which the ladder is leaned and the ladder.

When the ladder attachment according to the first and second aspects of the present invention is mounted, a suitable space can be set between the building and the upper end portion of the ladder, so that the ladder can be leaned against a rain gutter or a tile without contacting the ladder. At the same time, when leaning from the side of the sloping roof, the upper end of the ladder can be leaned against the wall of the building so that it can be stably leaned. Further, the first
・ The attachment for the ladder of the second invention is
A pair of left and right inverted U-shaped hooks and two legs
Equipped with a mounting U-shaped hook on the mounting frame
It has a ladder mounting part, so it is easy to attach and detach to the ladder
It's very easy to touch, and its U-shaped hook
Can be set tightly on a footrest, so it can be mounted on a ladder
Is stable and the ladder attached to the ground
And set the ladder upright.
Extremely safe on-site work that raises and leans against buildings
There is a specific action that makes it easier to do.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments. First, FIG. 1 showing the ladder attachment 1 of the first invention
-With reference to Fig. 2, the ladder attachment 1 of the present invention.
A ladder mounting portion 2 to be detachably mounted on a normal ladder 20 leaning on a roof or a building, and a ladder mounting portion 2 attached to and fixed to the ladder 20, and a pair of arm-shaped leaning brackets 3A and 3B protruding from the upper end of the ladder mounting portion 2. (Hereinafter simply referred to as brackets 3A and 3B) and the brackets 3A and 3B.
A main portion is constituted by a short rod-shaped leaning contact portion 4 (hereinafter simply referred to as a contact portion 4) which is hingedly connected to the tip of 3B and is rotatable.

More specifically, the ladder mounting portion 2 of this embodiment
On the back of the mounting frame 5, a pair of left and right inverted U-shaped hooks 6 to be hooked on the footrest bar 22 of the ladder 20 are provided in upper and lower two stages,
The inverted U-shaped hook 6 is hooked on the upper end portion of the ladder 20, and the elastic U-shaped hook 7 provided on the mounting frame 5 is hooked on the foot rail 22, and the ladder mounting portion 2 is attached to and detached from the ladder 20. Can be freely attached and fixed. The brackets 3A and 3B are bolted and set on a mounting bar 8 provided laterally at the upper end of the mounting frame 5 so as to be detachably attached.
And a pair of brackets 3A and 3B
Between them, there is a building receiving space 10 for receiving a projecting portion such as a building from the front.

A short rod-shaped contact portion 4 is hingedly connected to the middle of the body at the tip of the brackets 3A and 3B, and is rotatably mounted. In the posture of the ladder 20 leaning against the building wall 12 shown in FIG. 3B, the ladder 20 becomes a leaning point to be joined to the wall 12, and freely rotates in the horizontal direction according to the shape of the wall 12, so that “ ". At both ends of the contact portion 4, rubber pressure-contact cushions 9 that elastically contact the wall surface 12 are provided.

The positions of the brackets 3A and 3B attached to the mounting bar 8 are appropriately changed by selecting the bolt holes 11, and the protruding length L from the mounted ladder 20 to the front end of the contact portion 4 and the bracket 3A -Set the width of the building receiving space 10 formed by the span S of 3B to an appropriate amount and lean against the wall surface 12. Then, as illustrated in FIG. 2, a pair of abutting portions 4 are applied to the outer corner 14, the inner corner 15, the wall surface 12 of the concave portion 17 or the wall surface 12 of the cylindrical structure 16 of the building / structure. The ladder 20 is leaned up and down, and the ladder 20 is used as a work table for working at height.

The above-described embodiment of FIG. 1 has the above operation. That is, even when leaning against the curved or crossed wall surface 12 as in the above-mentioned protruding corner 14 or columnar structure 16, the building receiving space 10 between the two abutting portions 4 opened to the required span is required. The pair of abutting portions 4 can be joined and abutted to the non-planar wall surface by inserting the corner of the protruding corner 14 and the protruding portion of the columnar structure 16. Therefore, the upper end of the ladder 20 is stably held by two-point contact, and the contact portion 4 of this embodiment is rotatable. Since the contact is made by surface contact, the posture of the two-point contact holding is further stabilized.

Next, the ladder attachment 1 according to the second embodiment of the present invention will be described with reference to FIG. That is, FIG.
In the one having the ladder mounting portion 2 similar to the embodiment, the belt is bent into a V-shape to form an upper side portion 25 and an oblique side portion 26, and the mounting frame 5 forms a pair of triangular standing brackets 3A. 3B is provided in front of the ladder mounting portion 2 and the brackets 3A and 3B have upper side portions 2B.
5 and the bracket 3A
A bracket arm 27 of a separate bar material is provided which protrudes forward from 3B and has an abutting portion 4 at its tip for joining and abutting the wall surface 12 of the building or the like.

More specifically, the bracket arm 27 has a structure in which the protruding length L from the brackets 3A and 3B can be variably set by selecting the bolt holes 11 provided on the upper side 25 and the oblique side 26. As shown in FIG. 4, the protruding length L from the mounted ladder 20 to the contact portion 4 is
5 to the minimum projection length L2 from the maximum projection length L1 when connected to
Also, when connected to the hypotenuse portion 26, the structure can be adjusted and set in a very multi-step manner from L3 to L4.

The bracket arm 27 of this embodiment
Is a superimposed connection of the main bracket arm 27A having the contact portion 4 and the auxiliary bracket arm 27B attached to the bracket arms 3A and 3B, and changes the connection point between the main bracket arm 27A and the auxiliary bracket arm 27B. Thereby, the bracket arm 27 has a structure in which the total length can be set stepwise in length, and the bracket arm 27 is mounted by selecting the attachment position to the upper side 25 and the oblique side 26 and setting the length of the bracket arm 27 itself to be variable. Ladder 2
The projecting length L from 0 can be set very variously.

When the ladder attachment 1 of the embodiment shown in FIG. 3 is mounted on the ladder 20 and leaned against the wall surface 12 of the building, for example, the most suitable space for the construction of the bay window 13 of the wall surface 12 becomes
Since the ladder 20 can be provided between the ladder 20 and the wall surface 12, high-level work using the ladder 20 as a work table becomes extremely easy, and the safety and efficiency of the work are improved.

The ladder attachment 1 of the embodiment shown in FIGS. 1 and 3 does not need to lean on the roof edge because the wall surface 12 of the building is used as a leaning point, thereby preventing damage to rain gutters and roof edges. Even when the ladder is leaning against the side of the sloping roof, it is possible to prevent the building from being damaged and improve safety by setting the ladder in a stable leaning posture.

Note that the ladder attachment 1 of the present invention.
Is not limited to the above-described embodiment.
As shown in FIG. 5, the ladder 20 is formed by a combination of a pair of clamping members 30 which are clamped from the side of a pair of left and right vertical frames 21.
A movable piece 31 with a tightening bolt 32 is attached to one of the holding members 30.
In some cases, the pair of clamping members 30 allow the vertical frame 21 to be fixedly set at an arbitrary position, and the abutting portion 4 has a non-rotatable rod tip shape or the like. There is a change such as making it into another arbitrary shape.

[0023]

As described above, the attachment for a ladder according to the present invention stabilizes a leaning posture on a non-planar wall surface such as a corner of a building or a cylindrical columnar structure, and a ladder and a ladder leaning on the wall. Since an appropriate space can be set between the ladder and the ladder, the safety of the ladder is improved, and the workability, work safety and work efficiency of work at a high place using the ladder are improved. Further, since leaning on the roof edge of the building is unnecessary, damage to the building gutter and the roof edge is prevented. There are the above effects.

[Brief description of the drawings]

1A and 1B show a ladder attachment according to one embodiment of the first invention, wherein FIG. 1A is a perspective view thereof, and FIG.

FIG. 2 shows a use state of the ladder attachment of the embodiment of FIG. 1, and (A), (B), (C) and (D) are plan views thereof.

3A and 3B show a ladder attachment according to one embodiment of the second invention, wherein FIG. 3A is a perspective view thereof, and FIG.

FIG. 4 is a side view showing how to use the ladder attachment of the embodiment shown in FIG. 3;

5A and 5B show another embodiment of a ladder mounting portion of the ladder attachment of the present invention, wherein FIG. 5A is a perspective view thereof, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Attachment for ladders 2 Ladder mounting part 3A, 3B Leaning bracket 4 Leaning abutment part 5 Mounting frame 6 Reverse U-shaped hook 7 Elastic U-shaped hook 8 Mounting bar 9 Press-contact cushion 10 Building receiving space 11 Bolt hole 12 Wall 13 Bay window 14 Out corner 15 In corner 16 Column structure 17 Concave surface 20 Ladder 21 Vertical frame 22 Footrest 25 Upper side 26 Oblique 27 Bracket arm 27A Main bracket arm 27B Secondary bracket arm 30 Clamping member 31 Movable piece

Claims (3)

(57) [Claims] 1. A ladder attachment that is detachably mounted on a ladder having a multi-stage footrest crossing between a left and right vertical frame and a vertical crossing with the vertical frame, comprising: a ladder mounting portion; Protruding forward from the section with the required mutual spacing, and
A pair of leaning brackets having a leaning contact portion at the tip thereof to a building or the like is provided, and between the pair of leaning brackets, a building receiving space for receiving a corner of a building or the like is provided . , The footrest
A pair of left and right inverted U-shaped hook
Attach the U-shaped hook to the mounting frame
Attachment for a ladder characterized by a structure provided with . 2. The attachment for a ladder according to claim 1, wherein a short rod-shaped leaning contact portion rotatable in a horizontal direction is provided on the leaning bracket when the ladder is mounted on the ladder. 3. A ladder attachment which is detachably attached to a ladder having a multi-stage ladder provided between a right and left vertical frame and a footrest crossing orthogonal to the vertical frame. A triangular leaning bracket having an upper side part and a hypotenuse part protruding forward from the part, and furthermore, the leaning bracket is removably attached to one of the upper side part and the hypotenuse part, and And a pair of separate bracket arms having a leaning abutment portion at the tip is provided, and the length of the projection from the mounted ladder to the leaning abutment portion can be set freely .
Further, the ladder mounting portion is hooked on the footrest bar
A pair of left and right upper and lower two-stage inverted U-shaped hook and the footrest
A ladder attachment having a structure in which a mounting frame is provided with an elastic U-shaped hook to be hooked .