JP3449952B2 - Folding scaffolding - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffolding base used for high-place work such as interior work, and more particularly to a foldable scaffolding base which is made compact by folding and is convenient for transportation and storage.

[0002]

2. Description of the Related Art Generally, a scaffolding table used for work at a high place has a plane size and a sufficient height necessary for work.
Since it takes up a lot of space when not in use, a scaffolding stand has been proposed that is foldable and convenient for transportation and storage.

As a conventional foldable scaffolding, external support legs are attached to both sides of the central support leg through a connecting rod that can horizontally swing so that they can be moved toward and away from each other. There is known a structure in which a foldable top frame is pivoted along the outer surface of the support leg.

In order to use the scaffolding in a folded state, first, the top frames on both sides are raised horizontally to be fixed, respectively, and then one of the outer supporting legs is pulled out and the upper end of this outer supporting leg and one side are fixed. The lower frame end of the top frame is joined, then the other outer support leg is pulled out, and the upper end of this outer support leg and the lower face end of the other top frame are joined to assemble.

The folding may be performed in the reverse order of the above assembly.

[0006]

By the way, in the conventional folding type scaffolding platform as described above, not only the assembling and folding work steps are complicated and troublesome, but also two or more workers are required for assembling and folding. You will need it.

Further, when the external supporting legs are folded, the connecting rod horizontally rotates and overlaps with the central supporting legs, etc., so that there is a risk that an operator jams his / her fingers or the like.

Therefore, an object of the present invention is to make it possible to assemble and fold by moving the support legs on both sides along the rails of the top frame, and the steps of the assemble and fold work are simple and labor-free. Assembling and folding can be done by one worker and labor saving,
An object of the present invention is to provide a folding scaffolding base that can improve the safety of assembly and folding work.

[0009]

In order to solve the above-mentioned problems, the invention of claim 1 provides a top frame body having rails on both sides along the length direction, and a top frame body along the rails. It is movable in the length direction and consists of a pair of support legs that support the top frame body at the rail part.The top frame body is divided into three parts along the length direction into a central frame body and outer frame bodies at both ends. , The outer frame is pivotally attached to the central frame so that it can be folded downward from a horizontally extended state, and a pair of support legs are provided on both sides of the upper end along the rails of the top frame. A roller that rolls around is attached, and when both support legs move toward the center, the rollers are housed in the rails of the center frame to support the center frame, and the outer frame can be folded with respect to the center frame. It adopts the structure that has.

According to a second aspect of the present invention, in the first aspect of the present invention, the number of rollers mounted on both sides of the upper end of the support leg is set to a different number, one roller on one side and two rollers on the other side. ,
It adopts a configuration in which the support legs move smoothly along the rails.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a stopper capable of fixing the outer frame body to the central frame body in a horizontally expanded state is provided on the lower portion of the top frame body. The configuration is adopted.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, an opening / closing opening is provided in the central frame body, and an expandable / contractible ladder disposed between a pair of support legs is provided in a moving direction of the support legs. The upper end of the central frame is pivotally fixed at a position close to the opening of the central frame so as to be swingable.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 5, the folding scaffolding 1 has a planar size required for work, and a top frame 3 having rails 2 and 2 on both sides along the length direction. , The pair of support legs 4 and 4 that can move in the length direction of the top frame body 3 along the rails 2 and 2 and support the top frame body 3 at the rails 2 and 2, and the extended top frame body. 3 and a plurality of connecting members 5 for connecting the supporting legs 4 and 4 located at both ends thereof, and a ladder 6 that ascends and descends with respect to the top frame.

The top frame body 3 is divided into three along the length direction into a narrow central frame body 7 which is a rectangular frame and outer frame bodies 8 having wide ends, which are divided into three parts. The bodies 8 and 8 are pivotally attached to both ends of the central frame body 7 with butterfly incense 9 so as to be able to fold downward from a horizontally expanded state, and the central frame body 7 and both outer frame bodies 8 are formed. A mesh plate 10 and an iron plate are stretched on the upper surface of 8, respectively, and a worker can be placed on the upper surface.

The rails 2 and 2 on both sides of the top frame 3 are
As shown in FIG. 6, both ends are closed and formed into a cross-sectional shape in which an opening is provided in the lower surface of the square bar along the length direction. The both side rails 2 and 2 are rails 2 a located on both sides of the central frame body 7.
And rails 2b located on both sides of the outer frame bodies 8 at both ends
The rails 2a and 2b are continuous with each other when the central frame 7 and the outer frames 8 at both ends are horizontally extended.

The central frame 7 and the outer frames 8 at both ends are
The outer frame bodies 8 and 8 are horizontally extended, respectively, and the central frame body 7
There is provided a stopper 11 that can be fixed to and removed from the device.

The stoppers 11 are pipes 12 and 1 fixed to the central frame body 7 and the outer frame bodies 8 and 8 in a coaxially arranged manner.
3 and a connecting rod 1 that is inserted into and removed from both pipes 12 and 13
When the upper frame 3 and the outer frame 8 are connected to each other, the central frame 7 and the outer frames 8 at both ends are reinforced.

An opening 15 is formed in the center of the central frame 7 so that a person can pass through it. The opening 15 is opened and closed by a lid member 17 attached so that it can be flipped up by a hinge 16. It is possible, opening 1 at the bottom of the central frame 7
An upper end of a ladder 6 that can be expanded and contracted is pivotally fixed to a position on the opening and closing side of 5.

The ladder 6 includes a pair of supporting legs 4 facing each other.
It is located between 4 and can swing in the moving direction of the support legs 4 and 4.

The supporting legs 4 and 4 connect the vertical columns 18 on both sides with horizontal rails 19 and 20, and the casters 2 are attached to the lower ends of the vertical columns 18.
1 is attached, and one roller 22 rolling inside one rail 2 is attached to the upper end of the one vertical column 18,
On the upper end of the other vertical column 18, two rollers 22, 22 rolling in the other rail 2 are attached, respectively.

To attach the roller 22 to the one vertical column 18, an arm 23 is provided so as to project outward from the upper end of the one vertical column 18, and one roller 22 is pivotally fixed to the upper surface of this arm 23. The rollers 22 and 22 are attached to the upper end of the other vertical column 18 by mounting the arm 24 projecting outward on the upper end of the other vertical column 18 and projecting outward in the moving direction of the support leg 4. The L-shaped arm 25 is provided, and the rollers 22 and 22 are pivotally fixed to the upper end surfaces of the arm 24 and the L-shaped arm 25, respectively. The L-shaped arm 25 is shorter than the rail 2a of the central frame body 7. There is.

The two support legs 4 and 4 are arranged so that the L-shaped arms 25 are arranged in opposite positions in a face-to-face state, and when the support legs 4 and 4 are brought closest to each other at the center of the top frame 3. The two rollers 2 on the L-shaped arm 25 side are attached to the reel 2a of the central frame body 7.
2, 22 and one roller 22 of the mating support leg 4 are accommodated.

When the support legs 4 and 4 are moved along the rails 2 and 2 on both sides, as described above, in one support leg 4, one side is one roller 22 and the other side is two rollers 22. , 22, the two rollers 22, 22 serve as guides for movement, so that the rollers on both sides are not twisted, and the support legs 4, 4 can be smoothly moved, and at the same time, both support legs 4 By arranging the left and right L-shaped arms 25 in the left-right direction, it is possible to reduce the distance between the support legs 4 and 4 when they approach each other, so that they can be accommodated within the length of the rail 2a of the central frame body 7. is there.

As shown in FIG. 7, the vertical columns 18 of the support legs 4 and 4 are fitted with an upper large-diameter pipe 26 and a lower small-diameter pipe 27, and their upper ends are fixed to the upper part of the large-diameter pipe 26. The guide shaft 28 is incorporated into the large-diameter pipe 26 and the small-diameter pipe 27, and a spring 30 is contracted between the stopper 29 fixed inside the small-diameter pipe 27 and the upper part of the large-diameter pipe 26 to form the large-diameter pipe 26. A lock bolt 31 for urging upward elasticity is provided to fix the small-diameter pipe 27 to the lower part of the large-diameter pipe 26, and the structure is formed so as to extend and contract at all times, and the height of the top frame 3 can be freely set. At the same time, the lift of the top frame 3 can be lightly operated by using the pushing force of the spring 30.

A connecting member 5 for connecting the expanded top frame 3 and the support legs 4 and 4 located at both ends thereof has an upper end pivotally fixed to a lower part of the central frame 7 and a lower end thereof. The first connecting member 5a that is detachable and is detachably connected to the lower horizontal rail 20, and the upper end of the lower portion of the central frame body 7 is pivotally fixed, and is connected to the vertical column 18 of the support leg 4 via the gravity pin 32. The third connecting member 5b of No. 2 and the upper end of the outer frame 8 are pivotally fixed to the lower part of the outer frame 8 on the pivot side and are detachably connected to the upper horizontal rail 19 of the supporting leg 4.
The connecting member 5c is used.

These connecting members 5 are housed between the supporting legs 4 and 4 which have been moved closer to each other, by uncoupling the lower ends.

Although not shown, a handrail frame for safety is detachably attached around the top frame 3 as is well known.

The foldable scaffolding of the present invention is constructed as described above, and when not in use, as shown in FIG.
Both supporting legs 4 and 4 are located close to each other at the lower part of the central frame body 7, and both outer frame bodies 8 and 8 hang down on both sides of the central frame body 7, and a ladder 6 and a coupling are provided between the supporting legs 4 and 4. It is in a narrow folded state in which the member 5 is housed.

In this figure, the vertical columns 18 of both supporting legs 4 and 4 are also contracted.

In order to use the scaffolding base 1 from the above-mentioned folded state, first, the outer frame body 8 on one side is fixed to the central frame body 7 by the stopper 11, and the other outer frame body is fixed. Similarly, 8 is fixed in a horizontal state by a stopper 11 to extend the top frame body 3, and then both supporting legs 4 and 4 are moved along the continuous rails 2 and 2 on both sides to form both outer frame bodies. The top frame body 3 is horizontally supported at both ends by being positioned at opposite end portions of 4 and 4.

Since both support legs 4 and 4 have casters 21 at their lower ends and are moved by the rollers 22 along the rails 2 and 2 on both sides, they can be moved with a light force.

After that, as shown in FIGS. 1 to 3, the top frame 3 and the support legs 4 and 4 are connected by using the connecting members 5, and the ladder 6 is extended so that its lower end is grounded to the floor. Then, the assembly is completed, and the ladder 6 can be used to climb up to the top frame 3.

In order to return the folding scaffolding base 1 from the assembled state to the folded state, the connection between the supporting legs 4 and 4 of each connecting member 5 is released and the ladder 6 is contracted, contrary to the above-mentioned assembly. After that, both support legs 4 and 4 may be moved below the central frame body 7, the stopper 11 may be removed, and both outer frame bodies 8 and 8 may be folded.

[0035]

As described above, according to the present invention, the top frame body having rails on both sides along the length direction is divided into a central frame body and outer frame bodies at both ends, and the top frame body is supported. A roller that rolls along the rails of the top frame is attached to the pair of support legs, and when the support legs move closer to the center, the rollers are housed in the rails of the center frame to support the center frame, Since the outer frame can be folded with respect to the frame, both supporting legs along the rail can be easily moved with a light force, and the process of assembling and folding the scaffolding base is easy and hassle-free. It becomes possible to save labor.

Further, since the assembling and folding can be performed by the movement of both supporting legs along the rail, it is possible to improve the safety of work without pinching hands.

[Brief description of drawings]

FIG. 1 is a front view showing an assembled state of a folding scaffolding base.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the above.

FIG. 4 is a front view showing a folded state of the folding scaffolding base.

FIG. 5 is an exploded perspective view showing structures of a top frame body and supporting legs of the folding scaffolding base.

FIG. 6 is an enlarged vertical cross-sectional view showing the structure of the rails of the top frame and the rollers of the support legs.

FIG. 7 is a vertical cross-sectional view showing a telescopic structure of a vertical column in a support leg.

[Explanation of symbols]

1 folding scaffolding 2 rails 3 Top frame 4 support legs 5 connecting members 6 ladders 7 Central frame 8 External frame 9 Telescopic mechanism 11 stopper 15 openings 17 Lid member 18 vertical columns 19 side rail 20 horizontal cross 21 casters 22 Laura 23 arms 24 arms 25 L type arm

Claims (4)

(57) [Claims] 1. A top frame body having rails on both sides along the length direction, and a pair of supports that are movable along the rails in the length direction of the top frame body and support the top frame body at the rail portions. The top frame body is divided into three parts along the length direction into a central frame body and outer frame bodies at both ends, and the outer frame body is folded downward from a horizontal stretched state to the central frame body. The pair of support legs are formed so as to be pivotable so that rollers that roll along the rails of the top frame are attached to both sides of the upper end of the pair of support legs. Fits in the rail of the central frame and supports the central frame,
A foldable scaffold that allows folding of the outer frame with respect to the central frame. 2. The number of rollers mounted on both sides of the upper end portion of the support leg is set to be different from one roller on one side and two rollers on the other side to facilitate movement of the support leg along the rail. The folding scaffolding base according to claim 1. 3. The foldable scaffolding base according to claim 1, wherein a stopper which can fix the outer frame body to the central frame body in a horizontally stretched state is provided on the lower portion of the top frame body. 4. An openable and closable opening is provided in the central frame body, and an expandable and retractable ladder disposed between a pair of support legs is swingable in the moving direction of the support legs so that its upper end is a central frame. The folding scaffolding base according to any one of claims 1 to 3, which is pivotally fixed at a position close to an opening of a body.