JP4077443B2 - Springboard - Google Patents

Description

  The present invention relates to a platform having a flat top plate at the top of a pair of front and rear ladder legs. For example, when a housewife takes a thing in a high place in a room, he rides with bare feet. It relates to the platform used.

  Although publicly known documents such as patent gazettes cannot be specifically cited as conventional steps, the steps that have been used in the past are provided with a flat top plate at the top of a pair of front and rear ladder legs. Thus, the pair of front and rear ladder legs are usually closed at the upper end of both legs and folded so that the lower ends of both legs close, and the open leg at the lower end of both legs. It has a foldable structure that can change its posture.

  According to the conventional platform, since the top surface of the top plate is horizontal, the person who uses the platform steadily gets on the outside of the top plate while in use, so that the foot from the center in the front-rear direction of the top plate However, the body's center of gravity is often located outside the outer periphery of the top plate, and if the center of gravity is located outside the top plate, people on the top plate There is a risk that the body posture will become very unstable, causing the body to become unbalanced and fall off the foot from the platform.

  In view of the problems as described above, the present invention aims to place a person's foot at the center in the front-rear direction of the top board when the person puts his foot on the top board, thereby increasing the center of gravity of the body. It is an object of the present invention to provide a platform that is positioned within the outer peripheral range of the top board so as to eliminate the stepping off of the foot from the platform and to ensure the safety of work.

Means for solving the above problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 is provided with a top plate 2 at the top of a pair of front and rear ladder-like legs 1, 1. In this step, the top board 2 is divided into two parts, front and rear, and a pair of front and rear halves 2a in which the opposite end parts are pivotally attached to the open leg position and the closed leg position via the pivot T so that the posture can be changed. consists 2b, and both half bodies 2a, 2b are attached to the respective upper end portions of the ladder-like leg 1,1, both half bodies 2a, the convex surface portion 3 to each other Axis side of the upper surface of the 2b Convex surface portions 3o, 3o, which are halves of one side, are formed, and concave surface portions 4, 4 are formed on the opposite side, and both halves 2a, 2b are formed by both convex surface portions 3o, 3o and both concave surface portions 4 , 4 . When the is in an open leg position, the top surface of the top plate 2 has an arch A on the sole of the foot of the person M at the center in the front-rear direction. And characterized in that the both ends are formed respectively concave such that the center portion so as to location is formed in a convex shape and the toe portion B and the heel portion C of the sole in the front and rear end portions are located To do.

  The second aspect of the present invention is the step platform according to the first aspect, wherein each ladder-shaped leg body 1 is composed of a pair of left and right support columns 6 and 6 and a step rail 7 horizontally mounted between the support columns 6 and 6. The upper surface of the step rail 7 is characterized in that it is formed in a gently convex shape having a middle portion higher than both front and rear end portions.

The effects of the invention by the above solution will be described with reference numerals in the embodiments described later. Since the platform is a platform on which the top plate 2 is barefooted, the top plate 2 is divided into two parts, front and rear, A pair of front and rear halves 2a and 2b are pivotally mounted so that opposite end portions can be changed into an open leg position and a closed leg position via a pivot axis T, and both halves 2a and 2b are in the form of both ladders. mounted on respective upper end portions of the legs 1,1, both half bodies 2a, the convex portion is one half of the convex surface portion 3 to each other Axis side of the upper surface of the 2b 3o, 3o is formed, the opposite side concave portions 4 are formed on both the convex portions 3o, by 3o and biconcave portions 4, when both half bodies 2a, 2b are in the open leg posture, the upper surface of the top plate 2, before and after central portion so as to position foot arch a human M in the direction central portion is formed in a convex shape and the previous Since both end portions as toe B and the heel portion C of the sole located at both ends are formed respectively concave, human M is when working up the top plate 2, top plate 2 It is difficult to ride on the end side, and the foot is inevitably placed in the center part in the front-rear direction of the top plate 2, so that the center of gravity G of the body naturally lies within the outer peripheral range of the top plate 2, can be stably maintained working posture in state, eliminating slips foot from stool, Rutotomoni can secure the work, the front-rear direction central right and left soles of the arch a of the top plate 2 of the human M by The entire foot sole of the person M is held on the top plate 2 by positioning the toe part B and the heel part C of the sole on the concave surface parts 4 and 4 of both ends, respectively. In this extremely stable state, the person M can perform highly stable work.
Further, according to the present invention, it is possible to easily and easily manufacture the folding platform top plate 2 in which both ladder-like legs 1 and 1 can be changed between the closed leg position and the open leg position, and the cost can be reduced. Can do.

  According to the second aspect of the present invention, when the person M puts his / her foot on the stepped rail 7 of the ladder-like leg 1, the foot arch A is positioned on the convex surface portion of the stepped foot 7 so that the step can be performed in a stable state. The ladder 7 can be lifted and lowered safely by being able to put a foot on the crosspiece 7 and can be lifted and lowered comfortably with the soft feel of the arch A on the sole.

  FIG. 1 is a perspective view showing a step according to the present invention. FIG. 2 (a) is a front view of the step, (b) is a side view, and (c) is a side view in a folded state. 3A is a side view of the state in which the halves 2a and 2b constituting the top plate 2 are separated from each other, and FIG. 3B is a side view of both ladder-like legs by connecting the halves 2a and 2b. 1 is a side view of the two halves 2a and 2b in a state where the legs 1 and 1 are in an open leg posture; FIG. 2C is a diagram showing both halves 2a and 2b in a state where both the ladder legs 1 and 1 are in a closed leg position; FIG. FIG. 4 is an explanatory view showing the operation of the top board 2 of the platform, FIG. 5 is an enlarged side view of the platform 7, and FIG. 6 is an explanatory diagram showing a use state of the platform.

  This platform is provided with a top plate 2 at the top of a pair of front and rear ladder-like legs 1, 1, and the upper surface of the top plate 2, as can be seen from FIG. The center part is formed in a convex shape so that the back arch A is located, and both end parts are formed in a concave shape so that the toe part B and the heel part C of the sole are located in the front and rear end parts, respectively. Has been. In addition, the concave surface parts 4 and 4 of both front and rear end portions have the same shape, and the toe portion B and the heel portion C of the sole correspond to both the front and rear concave portions 4. The top plate 2 is composed of a pair of front and rear halves 2a and 2b, which are divided into two parts in the front and rear directions, and opposite end portions are pivotally attached to each other. 1 is fixedly attached to the upper end of each.

  The pair of front and rear ladder-like legs 1 and 1 have both halves 2a and 2b of the top plate 2 attached and fixed to the respective upper ends thereof pivoted to each other, and a pair of left and right link mechanisms 5 and 5 As shown in FIG. 2 (a), the lower leg sides of the legs 1, 1 are opened in an inverted V shape, and the lower ends of the legs 1, 1 are closed as shown in FIG. 2 (c). Thus, the posture can be freely changed to a closed leg posture in which both legs 1 and 1 are folded so as to be substantially parallel to each other.

  As shown in FIG. 2 (a), each ladder-like leg 1 has a plurality of steps 7 between a pair of left and right support columns 6 and 6 arranged in a substantially square shape so that the lower side is slightly widened. The upper surface of each crosspiece 7 is formed in a gently convex shape with a middle portion higher than both front and rear end portions.

  The pair of halves 2a and 2b constituting the top plate 2 are each made of an aluminum extrusion mold material as shown in FIG. 3 (a), and one half 2a is a half on one side of the convex surface portion 3. The top plate main body portion 8 having the convex surface portion 3o and the concave surface portion 4 formed thereon, the attachment portion 9 fitted to the upper end portion of the column 6 of the leg 1, and the pivot formation provided at the end portion of the convex surface portion 3o The other half-divided body 2b includes a top plate main body portion 8 formed with a convex surface portion 3o and a concave surface portion 4 that are also half on one side of the convex surface portion 3, and a column of the leg body 1. 6 includes an attachment portion 9 that is fitted to the upper end portion, and a small-diameter tubular portion 10b for forming a pivot provided at an end portion of the convex surface portion 3o.

  Thus, in order to pivotally connect the two halves 2a and 2b, the two halves 2a and 2b are shifted from each other in the left-right direction from the state shown in FIG. What is necessary is just to insert and insert the small diameter cylinder part 10b of the other half-divided body 2b in the large diameter cylinder part 10a, and thereby the large diameter cylinder part 10a of one half-divided body 2a and the large diameter cylinder part 10b of the other half-divided body 2a, Forms a pivot T which is concentrically connected to each other as shown in FIG. 3 (b). FIG. 3 (b) shows a state in which both halves 2a and 2b connected to each other are in an open leg position, and FIG. 3 (c) shows a state in which both halves 2a and 2b are folded into a closed leg position. Indicates the state.

  As described above, the opposite ends of the two halves 2a and 2b are pivotally attached to each other via the pivot T, whereby the top plate 2 as shown in FIGS. 3B and 3C is formed. In the open leg posture shown in (b), the top and bottom surfaces of the top plate 2 are concave and convex portions 4 and 4 at the front and rear ends, and the convex portion 3 is an intermediate portion between the front and rear concave portions 4 and 4. The top plate 2 formed in this way is fitted with rivets R by fitting both longitudinal ends of the attachment portions 9 of the halves 2a and 2b to the left and right struts 6 and 6 of the ladder-like leg 1, Attached to the leg 1. As described above, the top plate 2 is composed of a pair of front and rear halves 2a and 2b, which are divided into two parts in the front and rear directions and the opposite end portions are pivotally attached. The two halves 2a and 2b are both ladder-like legs. Since it can be attached to the upper end of each of 1 and 1, the top plate 2 of the folding stool that can be changed between the closed leg position and the open leg position can be easily manufactured, and the cost can be reduced. be able to.

  Further, as shown in FIGS. 3A to 3C, anti-slip ridges 11 extending in the left-right direction are spaced apart in the front-rear direction on the upper surfaces of the halves 2a, 2b forming the top plate 2. A plurality are formed.

  The ladder 7 of each ladder-like leg 1 is also made of an aluminum extrusion mold material. As shown in FIG. 5, the ladder 7 is composed of a ladder body 15 and a mounting portion 16, and the top surface of the ladder body 15 serving as a tread is The front-rear direction intermediate part is formed in a gentle convex shape higher than the front-rear both end parts, and the anti-slip ridge 12 extending in the left-right direction as in the halves 2a, 2b of the top plate 2 is provided in the front-rear direction. A plurality of strips are formed at intervals. The attachment portion 16 is attached by fitting both ends in the longitudinal direction of the traverse to the left and right struts 6 and 6 of the ladder-like leg 1 and rivet-joining them.

  As schematically shown in FIG. 1, plastic end covers 13 are fitted to the left and right ends of the halves 2 a and 2 b forming the top plate 2, and each ladder-like leg 1 is also attached. Plastic end covers 14 are fitted to the left and right ends of each crosspiece 7.

  When using the platform constructed as described above, for example, as shown in FIG. 6, when a housewife in the home opens and closes the sliding door 17 of the storage compartment in a high-insertion place, the person (housewife) ) When M is bare feet and puts his foot on the step 7 of the ladder-like leg 1 from the front side and climbs the top plate 2, the top surface of the top plate 2 is placed in the center in the front-rear direction. Since the center part of the sole of the sole of M is formed in a convex shape so that A is located, it is difficult for the person M to ride on the end side of the top board 2, and inevitably the convex part in the central part of the top board As shown in FIG. 6, the center of gravity G of the body is naturally positioned within the outer peripheral range of the top plate 2, thereby maintaining the work posture in a stable state. It is possible to eliminate the stepping off of the foot from the platform and to ensure the safety of the work.

  In particular, the top surface of the top plate 2 is formed in a convex shape so that the arch A of the sole of the foot of the person M is located in the central portion in the front-rear direction, and the toe portion B and the heel portion of the sole are formed at both front and rear ends thereof. Since both end portions are formed in a concave shape so that the portion C is located, when the person M goes up to the top plate 2 and works, as shown in FIG. The arch A is positioned on the convex surface portion 3 in the middle portion in the front-rear direction of the top plate 2, and the toe portion B and the heel portion C of the sole are respectively positioned on the concave surface portions 4 and 4 on both ends. Since the entire sole is held on the top plate 2 in an extremely stable state, the person M can perform a highly stable operation.

  In addition, accidents when using the platform are often caused by the balance of the body on the top plate 2, and in order to secure a little height in the process, the toes are often standing up. Since the upper surface of 2 is formed in the uneven surface shape as described above, the person M is hard to perform the toe standing action, and takes a work posture in a naturally stable state, so that the center of gravity G of the body is It is positioned within the outer peripheral range of the plate 2, and there is no stepping off of the foot from the platform, so that the safety of work is ensured.

  In addition, since the upper surface of each step rail 7 (the upper surface of the step rail main body portion 15) is formed in a convex shape, when the person M puts his / her foot on the step rail 7 of the ladder-like leg body 1, the sole of the sole of the foot is stopped. By positioning A on the convex surface of the stepping rail 7, it is possible to step on the stepping rail 7 in a stable state so that the ladder-like leg 1 can be lifted and lowered safely, and the foot arch A is soft and comfortable. You can go up and down.

It is a perspective view which shows the step platform which concerns on this invention. (a) is a front view of the platform, (b) is a side view, and (c) is a side view in a folded state. (a) is a side view of the two halves that make up the top plate separated from each other, (b) is a view of the two halves in a state where both halves are connected and both legs are in the open leg position. Side view (c) is a side view of both halves with both legs in a closed leg position. It is explanatory drawing which shows the effect | action of the top plate of a step. It is an enlarged side view of a foot cross. It is explanatory drawing which shows the use condition of a step.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ladder-shaped leg 2 Top plate 2a, 2b Half split body 3 Convex part 4 Concave part 6 Support pillar 7 Foot cross M Person A Person's foot arch B Person's sole toe C Person's sole W Perimeter range of the top plate

Claims (2)

In a platform with a top plate at the top of a pair of front and rear ladder legs, the top plate is divided into two parts, front and back, and the opposite end parts can be changed between the open leg position and the closed leg position via the pivot to consist a pair of front and rear halves which are pivotally connected, and both halves are attached to each upper end portions of the ladder leg, both halves upper surface of the convex surface portion to each other Axis close of A convex surface portion that is a half on one side is formed, and a concave surface portion is formed on the opposite side . When both halves are in an open leg position by both convex surface portions and both concave surface portions , the upper surface of the top plate is The center part is formed in a convex shape so that the arch of the person's sole is located in the center part in the front-rear direction, and the both end parts are concave so that the toe part and the heel part of the sole are located in the front and rear end parts, respectively. A step that is formed in a shape .   Each ladder-shaped leg consists of a pair of left and right struts and a traverse crossed between both struts, and the upper surface of each traverse is formed in a gently convex shape with a middle portion higher than both front and rear ends. The pedestal according to claim 1, wherein:

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