JP3178929B2 - Foldable ladder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder installed in front of a storage shelf or a display shelf, and more particularly to a foldable ladder which is very useful when used for a tool shelf provided in a factory or the like.

[0002]

2. Description of the Related Art Conventionally, a ladder or the like is unnecessary as in an automatic warehouse. Alternatively, a stepladder, a ladder, or the like is generally stored in a place (for example, a warehouse) out of the way, and is taken out and used as needed.

[0003]

However, in the above-mentioned automatic warehouse of the prior art, a device for automation is required, and as a result, it becomes expensive and it is very difficult to adopt it. Also, when preparing and placing a stepladder or ladder, it is in the way of placing it on the side of the storage shelf, and when keeping it out of the way, bring it as needed. There was a problem that it had to be done. In view of such circumstances, the present invention makes it possible to install and move a moving rail by using the upper and lower sides of a storage shelf. In addition, by operating one of the upper and middle engaging and disengaging handles, the upper and lower beams of the column and the moving rail are engaged and disengaged, and fixed and fixed.
Can be moved freely. Furthermore, by operating the engaging and disengaging device, it is rotated at an appropriate angle, and further, by operating the ladder lever, a step-like ladder is formed via a link mechanism,
It is an object of the present invention to provide a foldable ladder that can be made compact.

[0004]

The present invention employs the following technical means in order to solve the above-mentioned problems. The invention according to claim 1 is provided with movable rails of a foldable ladder at the upper and lower front portions of shelves such as storage shelves, and provided with a substantially character-shaped column that moves by guiding the movable rails, A movable wheel is provided on the upper and lower beams of the column, and a column of the column is provided with a foldable ladder provided with a link mechanism. When the ladder ascends to the foldable ladder, it can be folded The upper disengagement handle can move and lock the entire ladder, and move and lock the entire foldable ladder to the required place when not climbing to the foldable ladder A left and right engaging handle provided at an intermediate portion of the column 6 and a 180
A support shaft that can rotate within a range of degrees is provided via a bracket at an appropriate position below the column of the support, and a foldable ladder is formed on the upper portion of the support shaft via the link mechanism in a stepwise manner in the left and right direction. The technical means of providing a ladder lever that can be used is adopted. The invention according to claim 2 employs the technical means of a foldable ladder according to claim 1, wherein a handrail is provided in connection with a part of the link mechanism.

[0005]

According to the present invention, as a result of adopting the above technical means, it is possible to move left and right to a required position along a storage shelf with a disengagement handle, and the disengagement device and a ladder lever are made compact to be out of the way. In this manner, the ladder can be rotated and a step-like ladder can be formed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment according to the present invention, in which the upper and lower beams 5 and 5 of the column 3 are stored in the storage shelf by operating the upper and left and right disengagement handles 9 and 10. It can be disengaged from the provided moving rail 2 so that it can be fixed or moved.
3 is a schematic perspective view showing a state in which a step-like ladder is formed and can be used by operating the ladder lever 3 and the ladder lever 14; FIG. FIG. 2 is a schematic plan view showing an operation state and an overall layout of the foldable ladder of the present invention with respect to the storage shelf 1. First, a foldable ladder will be described in detail with reference to FIGS. 1 and 2.
At the upper and lower front portions of the ladder, foldable ladder moving rails 2 are provided. A substantially man-shaped column 3 is provided that moves with the moving rail 2 as a guide. And
The upper and lower beams 4, 5 are provided with moving wheels. The column 6 of the column 3 is provided with a foldable ladder 8 having a link mechanism 7. Furthermore, when the whole foldable ladder 8 is moved (see arrow A) when climbing to the foldable ladder 8, the upper engaging / disengaging handle 9 is also moved to a necessary place without climbing to the foldable ladder 8. When the entire foldable ladder 8 is moved (see arrow A), the middle portion is provided on the left and right sides (this is provided so that the handle can be operated even if the foldable ladder 8 is tilted to the left or right side). ) Left and right handle 1
0 is provided. The upper and lower handle 9 and the left and right handle 10 move the moving wheels provided on the upper beam portion 4 or the lower beam portion 5 with respect to the moving rail 2 via a stopper or the like. It is configured to break and connect the relationship,
Since a conventional well-known technique may be adopted, the description is omitted.

Next, the foldable ladder 8 and the related structure of the foldable ladder 8 and the column 6 will be described.
A bracket 11 is fixed at an appropriate position below the column 6 of the support 3, and a support shaft 12 is provided on the bracket 11 so that the bracket 11 can rotate within a range of 180 degrees (see arrow B).
2 is provided with an engagement / disengagement device 13 so that it can be locked at a required angle. As shown in FIG. 2, this can be rotated in a range of 180 degrees from a state parallel to the moving rail 2 to a state perpendicular to the rail 2 (see arrow B). A ladder lever 14 is provided above the support shaft 12 so that the ladder 8 can be formed into a ladder 8 that can be folded in a stepwise manner in the left-right direction (see arrow C) via a link mechanism 7. Although the details are not shown, for example, three ladders are formed on a cylindrical shaft protruding from the support shaft 12 so that the ladder is folded and a stepped ladder is formed.
A locking hole is formed at the center, left, and right of the step (left and right stepped ladder state and folded state), and for a ladder urged by a spring or the like to engage with the locking hole. When the lever 14 is pulled down to release the engagement and release it, the lever 14 is engaged by the urging force of the spring and is fixed at that position. And
A shaft 15 that slides like a piston cylinder extends and retracts on the extension of the ladder lever 14,
The link mechanism 7 of the foldable ladder 8 is connected to the tip of the shaft 15. In addition, 16 is a handrail and 17 is a mounting table.

[0008]

According to the present invention, as a result of employing the above configuration,
The following effects can be obtained. (1) The ladder can be smoothly and easily moved to a necessary place on the storage shelf. (2) A stepped ladder state can be easily achieved by operating a ladder lever, and can be formed in an optimal direction to the left and right. (3) When not in use, the ladder can be folded out of the way, parallel to the storage shelf.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a foldable ladder according to an embodiment of the present invention.

FIG. 2 is a schematic plan view showing an overall layout according to an embodiment of the present invention.

[Explanation of symbols]

1 ‥‥ Storage shelf 2 ‥‥ Transport rail 3 ‥‥ Post 4 ‥‥ Upper beam 5 ‥‥ Lower beam 6 ‥‥ Column 7 体 Link mechanism 8 ‥‥ Foldable ladder 9 ‥‥ Upper and lower Handle 10 Right and left handle 11 ‥‥ Bracket 12 ‥‥ Support shaft 13 ‥‥ Device 14 ‥‥ Ladder lever 15 ‥‥ Shaft 16 ‥‥ Handrail 17 ‥‥ Platform

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E06C 1/38 E06C 1/397 E06C 7/04 E06C 9/08

Claims (2)

(57) [Claims] A ladder-moving rail (2) is provided at the upper and lower front portions of a shelf (1) such as a storage shelf, and a substantially work-shaped column (3) is provided that moves using the moving rail (2) as a guide. A movable wheel is provided on the upper and lower beams 4 and 5 of the column 3, and a collapsible ladder 8 provided with a link mechanism 7 is provided on the column 6 of the column 3, and the collapsible ladder 8 is provided. An upper engagement / disengagement handle 9 that can move and lock the entire foldable ladder 8 when climbing to the ladder 8, and the entire ladder 8 that can be folded when not climbing to the ladder 8 A left and right engaging handle 10 provided at an intermediate portion of the column 6 which can move or lock the required position, and a support shaft 12 which can rotate in a range of 180 degrees on the front surface of the shelf 1. A bracket 11 is provided at an appropriate position below the column 6 of the column 3 And a ladder lever (14) capable of forming a ladder (8) that can be folded in a stepwise manner in the left-right direction via the link mechanism (7) above the support shaft (12). Free ladder. 2. A handrail 16 connected to a part of the link mechanism 7
2. The foldable ladder according to claim 1, further comprising: