JPH0533680Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a folding step stool that consists of two steps, an upper step board and a lower step board, and is convenient for storage and transportation by folding back and forth when not in use. .

(Prior art) There are various types of folding steps made of materials such as wood and stainless steel.
There is an idea described in Publication No. 36956.

(Problem to be solved by the invention) However, in order to fold the folding step stool of the above invention for storage or transportation, the front and rear legs and the top and bottom steps must be rotated separately and pulled toward the vertical board side. This procedure had the inconvenience of having to move various parts of the step stool in order to completely fold it.

Conversely, when assembling the step stool, it was necessary to operate each member in the same order, which was time-consuming and more inconvenient than folding it.

Additionally, since folding step stools are intended for people to stand on, there was also a safety requirement for them to be strong and to prevent the legs of the step stool from opening too much under the weight of the user.

(Means for Solving the Problems) The present invention is proposed to solve the above-mentioned problems, and it reliably prevents the legs from opening too much, and only moves the lower tread or either the left or right front leg. This provides a so-called one-touch folding step stool that can be completely folded.

The specific means includes: an upper tread, left and right rear legs fixed downward from the rear side of the upper tread, and pivotally supported downward from the front side of the upper tread in the front-rear direction. the left and right front legs, each having a concave portion near the intermediate portion of the left and right rear legs, and a rear connecting piece that is loosely fitted to be rotatable while horizontally spanning the concave portions; and the left and right rear legs. A front connecting piece is formed with one recess near the middle part of each of the front legs, and a front connecting piece is loosely fitted rotatably while horizontally spanning the recesses, and a rear connecting piece is fixed to the rear connecting piece. straddles the upper side of the front connecting piece so as to be able to move toward and away from the upper side as the front connecting piece rotates, and the lower side that contacts the upper side of the front connecting piece has a notch that matches the shape of the upper side of the front connecting piece. It has two left and right supporting pieces, a middle connecting piece that connects the two supporting pieces horizontally near the middle, and two through holes at both ends, one of the through holes being connected to the middle connecting piece. The folding step stool is characterized in that the other loosely fitted through hole is comprised of a middle support piece fixed to the front connecting piece, and a lower tread plate fixed to the two support pieces.

In this case, it is preferable that the front connecting piece, the middle connecting piece, and the rear connecting piece are each made of a round bar, and the notches in the two left and right supporting pieces have a substantially semicircular shape.

(Operation of the invention) Therefore, in the folding step stool according to the present invention, when the lower tread plate 11 is rotated upward as shown in FIGS. The supported pieces 8a, 8b rotate upward together with the rear connecting piece 6, and as the intermediate connecting piece 10 connected to these two supporting pieces 8a, 8b is inevitably pulled upward, the intermediate connecting piece 10 The middle support pieces 12, one of which is loosely fitted and the other fixed to the front connecting piece 7, are similarly pulled up, and when the front connecting piece 7 moves rearward, the left and right front legs 4a, 4b also move rearward and are completely The step stool 30 is foldable.

That is, in the folding step stool 30 of the present invention, the lower step board 11, the left and right support pieces 8a, 8b, the middle connecting piece 10, the middle supporting piece 12, the front connecting piece 7, the left and right front legs 4,
A and 4b are all linked in order, and can be easily folded with one touch.

When assembling the folded step stool 30, if the lower step board 11 or either of the left and right front legs 4a, 4b is pulled in the reverse order, they all operate in the reverse order, and there is no need to operate the other members. In this case, cutouts 9a and 9b on the lower surfaces of the two left and right support pieces 8a and 8b are configured to fit into the upper side of the front connecting piece 7.

(Embodiments) Hereinafter, embodiments of the folding step stool of the present invention will be described with reference to the accompanying drawings.

Incidentally, the dimensions of the folding step stool in the embodiments are merely examples, and the present invention is not limited thereto.

FIG. 1 is a perspective view showing an assembled state of an embodiment of a folding step stool 30 according to the present invention, and FIG.
The figure is a perspective view of the folded state, and FIG. 2 is a perspective view of the intermediate state.

As shown in Figures 1 to 3, the folding step stool 3
0 is provided with an upper tread 1 of a predetermined size at its top. In this embodiment, the upper tread plate 1 has a length of 180 mm.
It is made of a single plate with a width of 380 mm and a thickness of 18 mm.
It is not limited to a single plate, and may be made of plywood or steel as long as it is strong enough to withstand an adult carrying luggage and standing on it.

Two left and right rear legs 2a and 2b are fixed downwardly from the rear side of the upper treadle 1. In this embodiment, reinforcing members 3a and 3b of a predetermined size are hung from the left and right sides of the upper tread plate 1, and pins (not shown) of a predetermined strength are installed inside and caulked, so that the upper tread plate 1 and the rear leg 2a, 2b is fixed. The upper tread 1 and the rear legs 2a, 2b are not limited to examples in which reinforcing members 3a, 3b are installed vertically and pins are installed inside, or they are fixed with a caulking structure. It is also possible to fix it directly with wood screws etc. without providing it.

In this embodiment, the two left and right rear legs 2a and 2b are provided so as to open slightly rearward in order to improve the stability of the folding step stool 30 itself. In addition, two hind legs 2 on the left and right
In this embodiment, the lengths of a and 2b are 780 mm.

From the front side of the upper tread 1 on the opposite side to which the rear legs 2a, 2b are fixed, two front legs 4a, 4b on the left and right are similarly pivoted downward so as to be rotatable in the front and back direction. . In this embodiment, one bolt 5 is inserted on each left and right side through the reinforcing members 3a and 3b mentioned above.
The front legs 4a and 4b are configured to be freely rotatable in the front and rear directions at points a and 5b.

Like the rear legs 2a and 2b, the front legs 4a and 4b are provided so as to open slightly forward when assembled, in order to improve the stability of the folding step stool 30 itself.

In the folding step stool 30, the rear legs 2
Concave portions 22a, 22b are formed at one location each near the intermediate portions of a and 2b, and the concave portions 22a, 22
A rear connecting piece 6 is provided which is loosely fitted into the rear legs 2a and 2b and horizontally spans the rear legs 2a and 2b. Furthermore, the front legs 4a,
4b is similarly provided with recesses 44a, 44b and a front connecting piece 7. In this embodiment, the front connecting piece 7 and the rear connecting piece 6 are each formed of a round bar with a predetermined diameter (25 mm), and the recesses 22a, 22b, 44a, 44b
The planar shape of the front connecting piece 7 and the rear connecting piece 6 are also circular.
It is configured to be easily rotatable within the recess.

After this, the connecting piece 6 has two left and right supporting pieces 8a, 8.
b is fixed and has a predetermined length so that it can straddle the upper surface of the front connecting piece 7 so as to be able to move toward and away from it. It is sufficient that either one of the support pieces 8a and 8b is fixed to the rear connection piece 6, and in this embodiment, the wood screw 1
It is screwed on at 5. Also, these two supporting pieces 8
On top of a and 8b, a lower step board 11 of a predetermined size, which is a single plate similar to the upper step board 1 in this embodiment, is fixed with adhesive in this embodiment. In this embodiment, the step stool 11 is 180 mm long, 280 mm wide, and 18 mm thick, but the horizontal dimensions are shorter than the inner dimensions of the left and right rear legs 2a, 2b, and when folded, the two support pieces 8a, 8b It is also necessary that the upper tread plate 1 be stored without hitting the lower surface of the upper tread plate 1. As with the upper tread board 1, it is not limited to a single board as long as it has a predetermined strength. Step stool 11 and support pieces 8a, 8
What is used to secure the parts 1 and 2 is not limited to adhesive, but may also be made of wood screws 15 or the like.

On the lower surfaces of the support pieces 8a and 8b,
A notch 9 that matches the shape of the upper surface of the front connecting piece 7 is provided at a location where the front connecting piece 7 contacts the upper side of the front connecting piece 7.
a, 9b. In this embodiment, the front connecting piece 7
Since the shape is a round bar, the shape of the notches 9a and 9b is also approximately semicircular to match the diameter of this round bar. Therefore, when the folding step stool 30 is assembled, as shown in FIG. , 8b will not wobble or come off from the front connecting piece 7.

The two supporting pieces 8a and 8b are provided with an intermediate connecting piece 10 that is parallel to the rear connecting piece 6 and the front connecting piece 7 and horizontally connects the supporting pieces 8a and 8b near their intermediate portions. In this embodiment, this middle connecting piece 10
It is also made of a round bar.

Furthermore, it has two through holes 12a and 12b at both ends, one through hole 12a is loosely fitted into the middle connecting piece 10, and the other through hole 12b is provided with the middle supporting piece 12 fixed to the front connecting piece 7. The middle connecting piece 10 and the front connecting piece 7 are configured to interlock with each other according to their movements. In this embodiment, the front connecting piece 7 and the middle supporting piece 12 are screwed together using wood screws 15.

If necessary, horizontal pieces 13a and 13b may be provided to horizontally connect the left and right front legs 4a and 4b or the rear legs 2a and 2b to further increase the strength.

In the folding step stool 30 of the present invention, by moving the lower step board 11 upward as described above, the left and right supporting pieces 8a, 8b, the middle connecting piece 10, the middle supporting piece 12, the front connecting piece 7, the left and right front legs 4a, 4b all work in sequence and can be easily folded with one touch. When assembling, by pulling either of the front legs 4a, 4b in sequence, they work in reverse order as described above, and can be easily assembled with one touch.

FIG. 4 shows the state in which the folding step stool 30 according to this embodiment is stored in the foot box 25 of the storage unit 20 in the entrance, but it can be used not only in this example but also in various places such as a closet or a bookshelf unit. It is possible.

(Effect of the invention) As explained above, the folding step stool according to claim 1 provides a so-called one-touch type folding step stool that can be completely folded and assembled by simply moving the lower step board or either the left or right front legs. It can be said that it is extremely convenient to store and carry.

Furthermore, the notches provided on the left and right support pieces reliably prevent the front and rear legs from opening too much, making this folding step stool excellent in safety.

In the folding step stool of claim 2, since the front connecting piece, the middle connecting piece, and the rear connecting piece are each made of round rods, the rotation of the front connecting piece, the rear connecting piece, and the middle support piece is smooth. can be made to act. Furthermore, in the folding step stool of claim 3,
Since the notches in the two left and right support pieces are approximately semicircular to match the round bar of the middle connection piece, the left and right support pieces and the front connection piece fit together without any gaps, improving the stability of the folding step stool. It is something.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an assembled state of an embodiment of the folding step stool according to the present invention, FIG. 3 is a perspective view of the folded state, FIG. 2 is a perspective view showing an intermediate state thereof, and FIG. It is a perspective view showing a state in which the folding step stool is stored in the foot box of the storage unit in the entrance. Explanation of symbols: 30... Folding step stool, 1... Upper step board, 2a, 2b... Rear leg, 4a, 4b... Front leg, 6... Rear connecting piece, 7... Front connecting piece, 8a, 8
b...Support piece, 9a, 9b...Notch, 10...
... Middle connecting piece, 11... Lower tread plate, 12... Middle support piece.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An upper tread, left and right rear legs fixed downward from the rear side of the upper tread, and rotating in the front-rear direction downward from the front side of the upper tread. One recess is formed near the middle of each of the left and right front legs that are pivotally supported for free movement, and the left and right rear legs, and a rear connection that is loosely fitted to allow rotation while horizontally spanning the recesses. a front connecting piece having one recess formed near the intermediate portion of each of the left and right front legs, and a front connecting piece that is rotatably fitted loosely while horizontally spanning the recesses; and a front connecting piece that is fixed to the rear connecting piece. As the rear connecting piece rotates, the lever straddles the upper side of the front connecting piece in a manner that allows it to move toward and away from the upper side of the front connecting piece, and the lower side that contacts the upper side of the front connecting piece matches the shape of the upper side of the front connecting piece. two left and right support pieces each having a notch; a middle connecting piece that connects the two support pieces horizontally near the middle; two through holes at both ends; one of the through holes is A folding step stool, characterized in that the other through-hole is loosely fitted into the middle connecting piece and consists of a middle supporting piece fixed to the front connecting piece, and a lower tread plate fixed on the two supporting pieces. (2) The folding step stool according to claim 1, wherein the front connecting piece, the middle connecting piece, and the rear connecting piece are each formed of a round bar. (3) The folding step stool according to claim 1, wherein the notches in the two left and right support pieces have a substantially semicircular shape.