JP3182691U - Folding aluminum ladder - Google Patents

Abstract

The present invention provides a foldable aluminum ladder that is strong and robust, can be folded in the height direction, and provides a high climbing space when used.
SOLUTION: A crosspiece 100A and a plurality of ladder units 101, 102, 103 provided with struts 200 on both sides are vertically connected, and the struts 200 are formed by providing side panels on both sides of a main panel. Hinge 300 is installed between the side panel and the main panel, and at the upper and lower ends of the side panel and the main panel, respectively, and the side panel can be parallel or perpendicular to the main panel. The main panel is pivotally mounted, and at the pivotal ends of the ladder units, an end coupler made of a material superior in strength to these panels is installed at the end of the side panel and the main panel. A hinge 300 is integrally formed.
[Selection] Figure 1

Description

  The present invention relates to a collapsible aluminum ladder that can be folded and assembled as needed on site.

Aluminum ladders are mainly used for climbing high places, and ordinary aluminum ladders have a plurality of horizontal pedestals that are horizontally fixed and fixed between two U-shaped support posts. Configured.
The collapsible aluminum ladder can be pivoted on the top of the two ladders, the lower end can be expanded, and the folding angle of the two ladders is limited by a folding-type opening stop. A stepladder structure of the shape is formed, and the user can climb a high place by stepping on a ladder.

However, the conventional folding aluminum ladder has to be folded at the folding-type opening stopper to close the two ladders at the time of folding, and the height after folding remains high.
In a situation where the height does not change, it cannot be stored and stored, and it is inconvenient to move it with a ladder that is too long, especially on the stairs in the house. In addition, when transporting by automobile, there is a problem that a small space cannot secure a sufficient space for storage, and a conventional aluminum ladder is very inconvenient in both storage and transport.

The problem to be solved by the present invention is a foldable aluminum that is strong and robust, can be folded in the height direction, has a high climbing space when used, and can withstand repeated folding and unfolding To provide a ladder.
Another object of the present invention is to prevent the wobbling of the assembled aluminum ladder when the side panel is bent perpendicular to the main panel so that the main panel and the side panel are firmly positioned. .
Still another object of the present invention is to use a pair of aluminum ladders pivoted at the upper ends in an A-shape and use a movable opening stopper provided on the side panel of one aluminum ladder on the opposite side. It is to secure safety in use by hanging on the side panel.

  The folding aluminum ladder according to the present invention is configured by connecting a plurality of ladder units up and down, and each of the ladder units includes a step rail and pillars installed on both sides of the step rail. The support column is formed by providing side panels on both sides of the main panel, hinges are installed between the side panel and the main panel, and at the upper and lower ends of the side panel and the main panel of each ladder unit, The side panel can be parallel or perpendicular to the main panel, and the side panel and the main panel of the ladder unit adjacent to each other are assembled by being hinged by hinges. At the pivot end, an end connector is installed at the end of the side panel and the main panel, and the end connector and the hinge are integrally formed, and Kitan unit coupler is made of a material excellent in strength than the side panels and the main panel.

The end connector is made of aluminum / magnesium alloy material, and its end cross section is an arc-shaped surface, and is connected to the end of the main panel and the side panel by close fitting, riveting or snap fitting May be.
A plurality of ribs for improving the strength of the panel may be provided inside the hollow main panel and the side panel so as to be connected to the front and rear surfaces or the left and right surfaces.
Convex portions or tenons are provided on both sides of the main panel, tenon grooves are formed on the side surfaces of the side panel, and the tenon grooves are formed when the side panel is rotated by a hinge to be perpendicular to the main panel. The main panel and the side panel are positioned by fitting the convex portion or tenon of the main panel to the wobbling.
When the upper ends of the support columns arranged on both sides are pivotally mounted, a slot is formed in the main panel of one of the ladder units located at the uppermost end. In some cases, one end of the retractable top plate is pivotally attached.
At this time, it is preferable to provide a movable opening stopper that is detachably hooked to the opposite side panel on the side panel of one of the ladder units located at the uppermost end.

  The foldable aluminum ladder of the present invention can be folded in the height direction, is convenient for storage and transportation, has high robustness and durability, and is not easily damaged even after repeated folding and unfolding over a long period of time.

It is a perspective view of the aluminum ladder which shows the example of the present invention. It is a principal part perspective view of the support | pillar which concerns on the Example of this invention. It is a top view in the unfolded state of the support | pillar which concerns on the Example of this invention. It is a top view which shows the operation | movement which makes the main panel and side panel of a support | pillar which concern on the Example of this invention perpendicular | vertical. It is sectional drawing of the pivot part of the ladder units which concern on the Example of this invention. It is sectional drawing in the use condition of the stowable top plate which concerns on the Example of this invention. It is a side view in the use condition of the movable opening stopper which concerns on the Example of this invention. It is a top view in the unfolded state of the main panel and side panel of the support | pillar which concerns on the other Example of this invention. It is a top view which shows the operation | movement which makes the main panel and side panel of the support | pillar which concerns on the other Example of this invention perpendicular | vertical. FIG. 6 is a cross-sectional view of a panel and an end connector according to still another embodiment of the present invention. It is sectional drawing of the connection part of the main panel which concerns on the further another Example of this invention, and a side panel.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 7 show a first embodiment of the present invention.
As shown in FIGS. 1 and 2, the folding aluminum ladder 100 is configured by arranging a plurality of ladder units 101, 102, and 103 side by side in the vertical direction and pivoting each other.
Each of the ladder units 101, 102, and 103 is provided with support columns 200 on both sides of the crosspiece 100A.

Each support column 200 includes a main panel 201 and two side panels 202 and 203. The side panels 202 and 203 are pivotally attached to the main panel 201 and a hinge 300, and are parallel to the main panel 201 on both sides of the main panel 201. Or it can be vertical.
A hinge 300 is also provided on the upper and lower ends of the side panels 202 and 203 and the main panel 201, and the aluminum ladder 100 can be formed by assembling and associating with the adjacent ladder unit via the hinge 300.
In addition, when the end of the crosspiece 100A is fixed to one of the side panels 202 and 203, and the side panels 202 and 203 and the main panel 201 are deployed in parallel, the crosspiece 100A also becomes parallel, via the hinge 300 The connected upper and lower support columns 200 can be folded.

As shown in FIGS. 3 and 4, tenons 20A and 20B extending in an oblique inner surface direction are provided on both sides of the main panel 201 of the support column 200, respectively, and tenons 20A and 20B are provided on the side surfaces of the side panels 202 and 203, respectively. Insertion grooves 21 </ b> A and 21 </ b> B each having a sectoral cross section that 20 </ b> B engages so as to be rotatable are provided.
When the side panels 202 and 203 are bent at 90 degrees toward the inner surface on both sides of the main panel 201, the tenons 20A and 20B of the main panel 201 are inserted into the insertion grooves 21A and 21B of the side panels 202 and 203, respectively. The side panels 202 and 203 and the main panel 201 are firmly positioned by coming into contact with the end portions, and the assembled aluminum ladder can be prevented from wobbling.

The main panel 201 and the side panels 202 and 203 are extrusion-molded with aluminum, and as shown in FIG. 5, end couplers 500 are installed at the upper and lower ends of the main panel 201 and the side panels 202 and 203. The hinge 300 that connects the end connector 500 and the ladder unit adjacent to each other in the vertical direction is integrally formed. In addition, the end coupler 500 is made of an aluminum / magnesium alloy material having a relatively high hardness, and has durability against a plurality of repeated rotation operations, thereby improving safety in use.
The edge cross section of the end coupler 500 has arcuate surfaces 501 and 502, and after being assembled in the panel, the sharp edge formed by processing the panel is covered so that the user will not be injured during use. can do.

As shown in FIG. 6, when the upper ends of the support columns 200 on both sides are pivotally connected to each other so that the lower ends can be freely opened and closed, the main panel 201 of the support column 200 installed at the uppermost end is provided. The storage type top plate 600 can be provided.
A slot 201A is formed in the main panel 201 of the uppermost support column 200, and one end of the retractable top plate 600 is pivotally attached to the main panel 201 in the slot 201A.
The retractable top plate 600 is disposed in the slot 201 </ b> A when not in use, and when the aluminum ladder 100 is deployed in an A shape, the retractable top plate 600 is lifted up and rotated around the pivot 601. It is arranged flat on the upper ends of the two struts so that the user can climb up.

When the upper ends of the pair of aluminum ladders 100 are pivotally attached in this way, as shown in FIG. 7, the movable opening stopper is attached to the side panel 202 of the support column 200 positioned at the uppermost end of the one aluminum ladder 100. 700 can be installed.
One end of the movable opening stopper 700 is pivotally attached to the side panel 202. A concave portion is formed in the other end portion of the movable opening stopper 700, and a convex portion 701 is provided in the side panel 202 of the column 200 positioned at the uppermost end of the other aluminum ladder 100.
The movable opening stopper 700 is suspended along the side panel 202 when not in use, and when the aluminum ladder 100 is used in an A-shape, the movable opening stopper 700 is placed on the opposite side. It can be hooked on the convex portion 701 of the side panel 202 and safety in use can be improved.

As shown in FIGS. 8A and 8B, circular projections 801A projecting toward the inner surface are formed on both sides of the main panel 801, and arc-shaped recesses 801B are formed at the inner corners of the side surfaces. The tenon grooves 802A and 803A are formed in the inner side portions of the side panels 802 and 803, and arc-shaped recesses 802B and 803B for accommodating the hinge 8 can be formed at the corners.
Accordingly, when the side panels 802 and 803 are arranged flat, the side surfaces thereof are substantially in contact with the side surfaces of the main panel 801, and when rotated 90 degrees, the circular protrusions 801A are inserted into the tenon grooves 802A and 803A. Can be fixed.

As shown in FIGS. 9A and 9B, the end connector 900 can be coupled to the ends of the main panel 400A and the side panel 400B by a close fitting, riveting or snap fitting method.
In addition, a plurality of ribs 401 connected to the front and rear surfaces or the left and right surfaces can be installed inside the hollow main panel 400A and the side panel 400B to increase the strength thereof.

  The above is a description of the best embodiment of the present invention. The specific structure of the present invention is not limited to this, and all changes or modifications that can be easily conceived by those skilled in the art are included in the scope of the right of the present invention. include.

DESCRIPTION OF SYMBOLS 100 Folding aluminum ladder 101,102,103 Ladder unit 100A Step rail 200 Strut 201,801 Main panel 202,203,802,803 Side panel 300, 8 Hinge 20A, 20B Tenon 21A, 21B Insertion groove 400A Main panel 400B Side panel 401 Rib 500, 900 End coupler 501, 502 Arc-shaped surface 600 Retractable top plate 601 Axis 700 Movable opening stopper 701 Convex part 801A Circular protrusion 801B, 802B, 803B Arc-shaped concave part 802A, 803A Tenon groove

Claims (6)

  A collapsible aluminum ladder comprising a plurality of ladder units connected up and down, each ladder unit comprising a step rail and posts installed on both sides of the step rail, Are provided with side panels on both sides of the main panel, and hinges are installed between the side panel and the main panel, and at the upper and lower ends of the side panel and the main panel of each ladder unit, respectively. The side panel can be parallel or perpendicular to the main panel, and the side panel and main panel of the ladder unit adjacent to each other in the vertical direction are pivotally attached to each other by a hinge. At the landing end, an end coupler is installed at the end of the side panel and the main panel, the end coupler and the hinge are integrally formed, and the front Characterized by comprising a material end coupler is excellent in strength than the side panels and the main panel, folding aluminum ladders.   The end coupler is made of an aluminum / magnesium alloy material, and its end cross section is an arc-shaped surface, and is joined to the end of the main panel and the side panel by close fitting, riveting or snap fitting. The folding aluminum ladder according to claim 1, wherein   The plurality of ribs for improving the strength of the panel are provided in the hollow main panel and the side panel so as to be continuous with the front and rear surfaces or the left and right surfaces. Folding aluminum ladder.   Convex portions or tenons are provided on both sides of the main panel, tenon grooves are formed on the side surfaces of the side panel, and the tenon grooves are formed when the side panel is rotated by a hinge to be perpendicular to the main panel. The folding aluminum ladder according to any one of claims 1 to 3, wherein a convex portion or a tenon of the main panel is inserted into the main panel and the main panel and the side panel are positioned to prevent wobbling.   It consists of a pair of folding aluminum ladders, and the upper ends of the pillars arranged on both sides are pivoted together, and a slot is formed in the main panel of one of the ladder units located at the uppermost end, and stored in the slot The folding aluminum ladder according to claim 4, wherein one end of the type top plate is pivotally attached.   The movable opening stopper that is detachably hooked to the opposite side panel is provided on the side panel of one of the ladder units located at the uppermost end. Foldable aluminum ladder.

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