JP2018040204A - Folding-up type footstool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a footstool, extremely stable in climbing-up-and-down, and stabilizing an attitude even in footstool work, in a folding-up type footstool.SOLUTION: A folding-up type footstool 10 is the footstool 10 collapsibly formed by a hinge 45 by forming the hinge 45 along a corner part and a divided central fold line of its joint, by dividing horizontal plates 31 and 32 and top plates 41 and 42 in the center, by placing the top plates 41 and 42 on two side plates 21 and 22 and the two horizontal plates 31 and 32, and a locking piece is arranged in a position opposed to a support projection part for supporting the top plates 41 and 42 on the upper end of the horizontal plates 31 and 32 on the top plate reverse side, and two projection-shaped locking projection strips are formed in parallel to the longitudinal direction of the top plates 41 and 42 in a position adjacent in an orthogonal shape to the support projection part on the top plate reverse side, and a height of the support projection part of the horizontal plates 31 and 32 is set as a dimension for keeping an attitude in which the divided left-right top plates 41 and 42 sink in toward the central hinge 45.SELECTED DRAWING: Figure 1

Description

  In the present invention, the top plate is placed on the two side plates and the two horizontal plates, the horizontal plate and the top plate are divided at the center, and along the corners of the joint and the central fold. The present invention relates to a step stool that is foldable by a formed hinge.

When you are climbing on the top plate of the above-mentioned platform, and you have a light body without anything, there is almost no problem even if you stand on the platform.
However, when trying to climb with heavy luggage etc., first put one foot on the corner of the top plate corner of the table, then raise one foot and step on the center of the table top plate There are many things to do.
At this time, when the foot placed on the corner of the stepping platform is used as an axis and the foot is lifted toward the other, the shaft foot part often wobbles and the posture becomes extremely unstable. experience.
This is a structure in which this folding step can be folded via a hinge as described above, and the hinge part needs to be somewhat loosened. If the load increases, this looseness is thought to cause left and right shaking.
Therefore, the present invention seeks to eliminate the instability when climbing a step board based on this left and right shaking.
In addition, Patent Document 1 and Patent Document 2 exist in this folding step, but neither of them attempts to eliminate such instability of the posture.

JP2015-139553A Utility Model Registration No. 3159702

  The present invention has been made in view of the above circumstances, and with the following configuration, there is no wobbling of the step even when trying to climb a step with a heavy load or the like, and it is extremely stable even after being placed on the top plate. It is intended to provide a foldable stool that can maintain a stable posture.

  In the folding folding platform of the present invention, the top plate is placed on the two side plates and the two horizontal plates, and the horizontal plate and the top plate are divided at the center, and the corners of the joints are divided. A hinge is formed along the central crease, and in the step that is foldable by the hinge, a locking piece is placed on the back side of the top plate, at a position facing the support convex portion that supports the top plate at the upper end of the horizontal plate. Two locking ridges are formed in parallel with the longitudinal direction of the top plate at a position adjacent to the support convex portion on the back side of the top plate in a direction perpendicular to the top plate. The height is set to a dimension that maintains the posture in which the divided left and right top plates sink toward the central hinge.

  The foldable step stool described in claim 2 is characterized in that the locking ridges are arranged at substantially the center of each of the divided left and right top plates.

  The foldable stool described in claim 3 is characterized in that the locking piece and the locking ridge are formed slightly apart.

The folding folding platform of the present invention has a support projection that supports the top plate at the upper end of the horizontal plate and is perpendicular to this even when climbing with a heavy load etc. The locking ridges adjacent to the crossing state cross each other, counteract the generated load, and can stably climb without causing displacement or shaking.
On the other hand, when standing on both feet after climbing the step, the height of the support convex part of the horizontal plate maintains the posture where the divided left and right top plates sink toward the center hinge, The center part of the sole on the top plate sinks slightly, so that the human standing posture can be maintained straight without tilting back and forth.

  In the foldable step stool according to claim 2, the physical strength of the top plate when a load is applied by disposing the locking ridges at substantially the center of each of the divided left and right top plates. Can be increased.

  In the foldable step stool according to the third aspect, the step of folding and unfolding the step pedestal is facilitated by forming the locking piece and the locking ridge slightly apart.

FIG. The partially expanded bottom view showing the back surface of a top plate. The partially expanded side view which shows the engagement state of a support convex part and a latching convex strip. The partially expanded side view which shows the sinking state of a top plate. The partially expanded side view in the middle of folding.

  In the folding folding platform of the present invention, the top plate is placed on the two side plates and the two horizontal plates, and the horizontal plate and the top plate are divided at the center, and the corners of the joints are divided. A hinge is formed along the central fold, and the hinge is formed to be foldable by the hinge.

  The details are as shown in FIG. 1, and the two side plates are composed of a side plate 20 of a left side plate 21 and a right side plate 22 arranged in the standing leg direction. Lateral hinges 23a and 23b are formed between the left top plate 41 and the right top plate 42 of the top plate 40, which will be described later, at the corner of the upper end. In addition, vertical hinges 24a, 24b, 24c, and 24d are formed at corners that are connected to a horizontal plate 30 described later.

The two horizontal plates are constituted by a horizontal plate 30 of a left horizontal plate 31 and a right horizontal plate 32 arranged in the stance direction as described above.
The left horizontal plate 31 and the right horizontal plate 32 are divided into left and right with the central hinges 35a and 35b as axes. The left and right upper ends of the divided left lateral plate 31 have support convex portions 33a and 33b that contact and support the top plate, and the right lateral plate 32 has similar support convex portions 34a and 34a, 34b is disposed.

The top plate 40 placed on the side plate 20 and the horizontal plate 30 is divided into two at the center like the horizontal plate 30 and is composed of a left top plate 41 and a right top plate 42. In the middle thereof, a handle frame portion 43 for a handle is disposed on one side, and a fitting recess 44 that fits on the other side is disposed on the other side. A central hinge 45 is formed between the handle frame portion 43 and the fitting recess 44.
On the back surface of the top plate 40, left locking pieces 46a, 46b and right locking pieces 47a, 47b are arranged at positions facing the support convex portions 33a, 33b, 34a, 35b that support the top plate at the upper end of the horizontal plate. Set up.
That is, as shown in FIG. 2 and FIG. 3, when the folding step is once deployed and formed into a step with respect to the support convex portions 33a, 33b, 34a, and 35b, the step is formed again by the action of the hinge thereafter. This is to prevent the folding force from acting when it is folded and maintain the unfolded shape of the platform.

Now, in the folding step, in the present invention, as shown in FIG. 4 and FIG. Two convex left locking ridges 48 and right locking ridges 49 are formed in parallel to the longitudinal direction of the top plate at positions orthogonally adjacent to each other.
The support protrusions 33a, 33b, 34a, 34b are orthogonally adjacent to each other. The support protrusions 33a, 33b, 34a, 34b are arranged at the upper end of the horizontal plate 30, whereas the locking protrusions 48, 49 are For example, in the locking ridge 48 adjacent to the support convex portion 33a, the proximity position is such that it is lightly in contact with the standing wall portion outside the support convex portion 33a. And The support protrusions 33a, 33b, 34a, and 34b are disposed in the same direction as the horizontal plate 30, whereas the support protrusions are in contact with the orthogonal direction.
The convex shape refers to a relationship in contact with the supporting convex portion and opposed thereto, specifically, a convex piece having a thickness of 2 mm and a height of about 11 mm. This is a direction parallel to the longitudinal direction of the top plate, and is in a state extending in a streak shape.

  The arrangement position of the locking ridge is not limited to the inside or the outside of the supporting protrusion, but the left and right top plates 41 and 42 are divided into the left and right locking ridges 48 and 49. When arranged in the substantially central part, even when a heavy load is applied to a person on the top board and a heavy load is applied, the physical strength can be increased along the longitudinal direction of the top board.

Further, the height of the support protrusions 33 a, 33 b, 34 a, and 35 b of the horizontal plate 30 is set so that the divided left top plate 41 and right top plate 42 maintain the posture of sinking toward the central hinge 45. To do.
That is, as shown in FIG. 4, when the top plate 40 is divided into left and right via the central hinge 45, the angle between the left and right top plates 41 and 42 is determined by the support protrusions 33 a and 33 b of the horizontal plate 30. It is determined by the height of 34a, 35b.
When the central hinge 45 is taken as the central axis, the left top plate 41 and the right top plate 42, which take a form extending left and right from there, cross each other and face each other at a certain angle, and the angle is centered on the central hinge. It is determined by the height supported by the left and right support protrusions.
Conventionally, the height of the support convex portion is formed to be a slight mountain shape with the central hinge 45 as a vertex.
Here, in the present invention, the height of the support convex portion of the horizontal plate is set to a dimension that maintains the posture in which the divided left and right top plates sink toward the central hinge.
That is, the height of the support convex portions 33a, 33b, 34a, and 35b of the horizontal plate 30 is set low, specifically, for example, about 9 mm. And the top plate 40 is formed so that the angle configuration by three points formed by the left and right lateral hinges 23a, 23b and the central hinge 45 is slightly valley-shaped.

The operation and effect of the step of the present invention will be described below.
First, in the folding step board of the present invention, when the step board 10 as shown in FIG. 1 is lifted upward with the handle frame portion 43 of the top board 40, the left side with the central hinge 45 of the top board 40 as the center axis is left. The top plate 41 and the right top plate 42 rotate in a direction in which the top hinge 41 and the right top plate 42 are folded in two with the horizontal hinges 23a and 23b as axes. Accordingly, the left horizontal plate 31 and the right horizontal plate 32 of the horizontal plate 30 rotate in the direction of being folded inward about the vertical hinges 24a, 24b and 24c, 24d, which are parallel to each other, with the central vertical hinges 35a and 35b as the central axis. . Thus, the unfolded step 10 is folded into two plates.
When unfolding, the handle frame 43 is lowered, the left side plate 21 of the side plate 20, the right side plate 22, the left side plate 31 of the side plate 30, and the lower end of the right side plate 32 are attached to the floor surface or the like. When the left side plate 21 and the right side plate 22 of the left side plate 22 are opened to the left and right, the left side plate 31, the right side plate 32, and the top plate of the side plate 30 are operated with the respective hinges as axes. The left top plate 41 and the right top plate 42 of 40 are rotated to form the platform 10 as shown in FIGS.
The above operation is the same as that of a conventional folding step.

Next, in such a foldable step, when a person tries to climb a step with a heavy load or the like, the horizontal hinge 23a that is once a boundary between the side plate 20 and the top plate 40 is often used. Alternatively, the shoe sole is applied to the position 23b, and then the other leg is lifted using the sole as an axis foot to place the entire body on the platform.
However, at this time, as shown in FIG. 4, the load pressure (arrow) to be climbed is the four points of the upper ends of the vertical hinges 24a and 24b at the boundary between the side plate 20 and the horizontal plate 30 and the horizontal hinges 23a and 23b. The upper corner portion of the trapezoidal portion formed therebetween is pressed in the direction of the arrow. Then, the pressing force from the upper corner of the trapezoidal part slightly distorts the trapezoid due to the flexibility with which the side plate 20 is formed of synthetic resin and the pivotability by the lateral hinges 23a, 23b, etc. It acts to shift in the pressing direction.
Even if this deviation is slight, it will cause the pivoting foot of one foot to shake, causing instability to a person with heavy luggage, etc., and possibly causing a serious accident such as a fall. Arise.

However, in the folding step of the present invention, as shown in FIG. 2, on the back side of the top plate, the support convex portions 33 a, 33 b, 34 a, and 35 b that support the top plate 40 at the upper end of the horizontal plate 30 are orthogonally adjacent to each other. Two convex left locking ridges 48 and right locking ridges 49 are formed at positions parallel to the longitudinal direction of the top plate.
As a result, even if the upper corner portion is climbed with a foot, the support convex portions 33a and 33b that support the top plate at the upper end of the left horizontal plate 31 and the left locking ridge 48 adjacent to the state perpendicular to the support convex portions 33a and 33b are provided. Cross and counter the resulting load. In other words, as described above, when climbing with the upper corner part placed on the foot, even if a force is applied in a direction in which the left top plate 41 is displaced, the left locking ridge 48 provided on the back side of the top plate is left. The left locking ridge 48 formed at the upper end of each of the two crosses in an orthogonal state to block this movement.

This action is also caused at the same time between the support convex portions 34a, 34b of the right lateral plate 32 and the right engaging projection 49, and the left lateral plate 31 and the right lateral plate 32 are continuous. In response to the displacement produced in the left lateral plate 31, the support convex portions 34a, 34b and the right engaging convex ridge 49 of the right lateral plate 32 also act to contain them, and both act in concert with each other.
Therefore, even if it climbs with a foot on the upper corner, the possibility of causing the top plate 40 to shift or shake is eliminated, and it is possible to climb extremely stably without accidents such as falling.

  When climbing from the direction orthogonal to the hinges, the lateral hinges 23a and 23b do not rotate in the direction in which the load acts, so the problem due to the above-mentioned deviation does not occur.

Now, as described above, even if it is possible to climb stably on the top board, when carrying a heavy load, the following concerns arise.
That is, in the conventional folding step, the folding left top plate 41 and the right top plate 42 are folded back by the central hinge 45 with the left and right horizontal hinges 23a and 23b as the basic axes. A mountain-shaped triangle is formed at the apex.
And if you put your feet here, if you have luggage etc. and lean forward, you will be inclined further forward by the inclined wall, conversely if you lean backward, you will be further back It will tilt. In other words, depending on the mountain-shaped triangle with the center at the top, if the tilt occurs forward or backward, the foot cannot be strung, and there is a risk that the posture may be lost forward or backward. .

On the other hand, in the platform of the present invention, as shown in FIG. 4, the left top plate 41 and the right top plate 42 divided into the heights of the support convex portions 33 a, 33 b, 34 a, and 35 b of the horizontal plate 30 are The dimensions are such that the posture of sinking toward the central hinge 45 is maintained, and for the top plate 40, the angle configuration by the three points formed by the left and right lateral hinges 23a, 23b and the central hinge 45 is slightly valley-shaped. It is formed.
As a result, when the foot is placed on the top board 40, if it leans forward, the front part of the foot with the toes forms a slope that becomes an ascending slope with respect to the depressed central part. By stepping on the uphill, you can correct the forward leaning posture. When leaning backward, the rear part of the foot on the rear side forms a downhill, and if force is applied to the buttocks of the back, the downhill leads in the opposite direction, and the posture of the backward inclination is It can be corrected. In terms of vector as well, the mountain shape tilts the posture outward, whereas the valley shape allows the posture to be inside.
Therefore, even when a heavy load or the like is held on the platform, a stable and straight posture can be maintained without tilting back and forth.

  If the left locking pieces 46a, 46b and the right locking pieces 47a, 47b and the left locking projections 48 and the right locking projections 49 are formed slightly apart from each other, the folding and unfolding operations of the platform are facilitated.

10 Step 20 Side plate 21 Left side plate 22 Right side plate 23a, 23b Horizontal hinges 24a, 24b, 24c, 24d Vertical hinge 30 Horizontal plate 31 Left horizontal plate 32 Right horizontal plate 33a, 33b Support convex portions 34a, 34b Support convex portions 35a, 35b Center vertical hinge 40 Top plate 41 Left top plate 42 Right top plate 45 Center hinges 46a, 46b Left locking pieces 47a, 47b Right locking pieces 48 Left locking ridges 49 Right locking ridges

Claims (3)

The top plate is placed on the two side plates and the two horizontal plates, and the horizontal plate and the top plate are divided at the center, along the corners of the joints and the divided central folds. In the platform formed with a hinge and foldable by the hinge,
On the back side of the top plate, a locking piece is disposed at a position facing the support convex portion that supports the top plate at the upper end of the horizontal plate, and at the position adjacent to the support convex portion on the back side of the top plate, Form the locking ridges of the book parallel to the longitudinal direction of the top plate,
A folding step, wherein the height of the support convex portion of the horizontal plate is set to a size that maintains the posture in which the divided left and right top plates sink toward the hinge at the center.   A folding step, wherein the locking ridges according to claim 1 are arranged at substantially the center of each of the divided left and right top plates.   The folding step according to claim 1 or 2, wherein the locking piece and the locking protrusion are formed slightly apart from each other.

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