JP2008208592A - Foldable boarding ramp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide foldable boarding ramps which are protected from collapsing not only when the boarding lamps such as trestles are stacked on each other in the same direction but also when they are stacked alternately. <P>SOLUTION: The foldable boarding ramp is set up by pivotally connecting a pair of leg bodies 4, 4 which are each formed of a pair of right and left supports 7, 7 arranged like an almost truncated chevron shape, and treads 8 arranged between the supports in a plurality of stages, via their upper edges in a foldable manner between a leg open position and a folded position. Herein each leg body 4 has cargo collapse preventing guides 2, 3 mounted on a side surface of an upper necessary location of each support 7 and on a side surface of a necessary location of a lower-stage tread 8a, the side surfaces being opposed to the side surfaces of the other boarding ramp 1 when the boarding ramps 1 are stacked on each other in the folding position. Each of the collapse preventing guides 2, 3 has an engaging projection 9 and an engaging recess 10 which are fitted to each other between the boarding ramps 1, 1 when they are stacked on each other in the same direction or alternatively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a folding lift used as a step or a stepladder, and in particular, an upper end portion of a pair of legs in which a step rail is attached to a plurality of upper and lower steps on a pair of left and right columns arranged in a substantially C shape. The present invention relates to a foldable lifting platform in which the legs are pivotally connected to each other in an open leg position and a folded position.

  Known documents such as patent gazettes cannot be specifically cited as conventional folding elevators, but in conventional folding elevators, do not collapse when multiple elevators are stacked in a folded position. There is known a lifting platform in which concave and convex portions for engagement are provided on the side surfaces of the legs of each leg so that the lifting platforms are engaged with each other when the lifting platform is stacked. However, the conventional lifting platform is applied only when the lifting platform is stacked in the same direction. It was not possible to prevent the collapse of the cargo.

  When transporting the lifting platform with a forklift at the storage location of the lifting platform, there is no problem if the lifting platforms are stacked alternately, but the center of gravity is biased when stacking the lifting platforms in the same direction. It was very difficult to transport with a forklift, and there was a problem that the stacking platform was repeated during transportation.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a foldable lifting platform that can prevent load collapse not only when the platform, such as a stepladder, is stacked in the same direction but also when the platform is stacked alternately. And

Means for solving the above problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 is directed to a pair of left and right support columns 7 and 7 arranged in a substantially C shape. A foldable lifting platform in which the upper ends of a pair of legs 4 and 4 attached with a plurality of upper and lower piers 8 are pivotably connected to each other in an open leg position and a folded position,
In each leg 4, the lifting platform 1 is placed in the same direction or on the side portion facing each other when the plurality of lifting platforms 1 are stacked in the folded position at the required portion of the upper end side of each support column 7 and the required portion of the lower step rail 8 a. The load collapse prevention guides 2 and 3 having the engaging convex portions 9 and the engaging concave portions 10 which are engaged with each other between the lifting platforms 1 and 1 at the time of stacking alternately are attached.

  In the foldable lifting platform according to claim 1, each of the load collapse prevention guides 2 and 3 has mounting guide main bodies 2a and 3a on the surface side of the mounting guide main bodies 2a and 3a. The engaging protrusion 9 and the engaging recess 10 and a rivet or bolt mounting recess 11 are provided.

  According to a third aspect of the present invention, in the foldable lifting platform according to the second aspect, the mounting guide main bodies 2a and 3a have a positioning hole 12 provided on the back side of the leg body 4 or the side of the step rail 8 on the back side. The positioning projection 13 is provided with a mating positioning projection 13.

  Claim 4 is the foldable lifting platform according to claim 2 or 3, wherein the support main body 2a of the load collapse prevention guide 2 attached to the column 7 side of the leg 4 is provided with this column side load collapse prevention. Positioning mark for positioning so that the engaging uneven portions 9 and 10 of the guide 2 are attached to the positions where the engaging uneven portions 9 and 10 of the load collapse prevention guide 3 attached to the leg 4 side of the leg 4 are engaged with the uneven portions. 14 is formed.

  A fifth aspect of the present invention is the folding-type lifting platform according to the second or third aspect, wherein the mounting guide main body 3a of the load collapse prevention guide 3 mounted on the side of the foot 4 of the leg 4 is provided with the load on the side of the foot. Positioning for positioning so that the engagement unevenness portions 9 and 10 of the collapse prevention guide 3 are attached to positions where the engagement unevenness portions 9 and 10 of the load collapse prevention guide 2 attached to the support column 7 side of the leg 4 are unevenly fitted. A mark 15 is formed.

  The effect of the invention by the above-described solution means will be described with reference numerals of embodiments to be described later. According to the invention according to claim 1, each leg 4 is provided with an upper end side required portion of the support column 7 and a lower step side step. Engagement between the elevators 1 and 1 is uneven when the elevators 1 are stacked in the same direction or alternately on the side parts facing each other when the elevators 1 are stacked in the folded position at the required part of the crosspiece 8a. Since the load collapse prevention guides 2 and 3 provided with the joint convex part 9 and the engaging concave part 10 are attached, not only when a plurality of lifting platforms 1 such as stepladders are stacked in the same direction but also when they are stacked alternately. It is possible to effectively prevent the collapse of the stacked elevators 1.

  According to the second aspect of the present invention, the load collapse prevention guides 2 and 3 have the mounting guide main bodies 2a and 3a, and the engaging convex portions 9 and the engaging concave portions on the surface side of the mounting guide main bodies 2a and 3a. 10 and a recess 11 for attaching a rivet or bolt, the guide main bodies 2a and 3a for attaching the load collapse prevention guides 2 and 3 are connected to the support 7 and the traverse 8 of the leg 4 with rivets 16 or bolts 17. Can be easily installed.

  According to the third aspect of the present invention, the positioning protrusions 13 that engage with the positioning holes 12 provided on the support column 7 side or the tread bar 8 side of the leg 4 are provided on the back side of the mounting guide main bodies 2a, 3a. Therefore, the load collapse prevention guides 2 and 3 are attached by engaging the positioning projections 13 of the load collapse prevention guides 2 and 3 with the positioning holes 12 provided on the support column 7 side of the leg 4 or the side rail 8 side. It can be done quickly and accurately.

  According to the fourth aspect of the present invention, when mounting the support column side load collapse prevention guide 2, the engaging uneven portions 9, 10 of the support column side load collapse prevention guide 2 are placed on the side rail side load when the lifting platform 1 is stacked alternately. The column-side load collapse prevention guide 2 can be easily attached to the position where the projections and depressions 9 and 10 of the collapse prevention guide 3 are engaged with the projections and depressions.

  According to the fifth aspect of the present invention, when mounting the step rail side load collapse prevention guide 3, the engaging uneven portions 9 and 10 of the step rail side load collapse prevention guide 3 are arranged on the column side when the lifting platform 1 is stacked alternately. The step rail side load collapse prevention guide 3 can be easily attached to the position where the projections and depressions 9 and 10 of the load collapse prevention guide 2 are engaged with the projections and depressions.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 (a) shows a folding elevator according to the present invention, a front view in a folded state, and (b) is a side view. 2 (a) is a front view of the column-side load collapse prevention guide, FIG. 2 (b) is a plan view, FIG. 2 (c) is a rear view, and FIG. 3 (a) is FIG. 2 (a). (B) is a cross-sectional view taken along the line BB of FIG. 4, (c) is a cross-sectional view taken along the line CC of the same figure, and (a) in FIG. (B) is a plan view, (c) is a rear view, (a) in FIG. 5 is a side view of the sidewalk prevention guide, and (b) is a D- D line sectional drawing, (c) is the EE sectional view taken on the same line, (d) is the FF sectional view taken on the same figure.

  As shown in these drawings, the lifting platform 1 is composed of a pair of front and rear legs 4, 4, and both legs 4, 4 are pivotally connected by hinges 5 at their upper ends, The link mechanisms 6 and 6 open the inverted V-shaped leg (not shown) with the lower ends of the legs 4 and 4 open, and the lower ends of the legs 4 and 4 are closed as shown in FIG. The posture can be freely changed to the folded posture folded in parallel.

  As shown in FIG. 1 (a), each leg 4 has a pair of left and right support columns 7 and 7 arranged in a substantially square shape so that the lower side is widened. In each leg 4, a plurality of lifting platforms 1 are folded at the upper end side required part of each column 7 and the required part of the lower step rail 8 a as shown in FIG. 1 (b). A column provided with engaging convex portions 9 and engaging concave portions 10 that are fitted in concave and convex portions between the lifting platforms 1 and 1 when stacked in the same direction or alternately on the side surfaces facing each other when stacked in a tatami posture. The side load collapse prevention guide 2 and the side rail load collapse prevention guide 3 are attached.

  The structure of the load collapse prevention guides 2 and 3 will be described in detail. First, FIGS. 2 and 3 show the load collapse prevention guide 2 attached to the support column 7 side of the leg 4. The column-side load collapse prevention guide 2 has a mounting guide body 2a made of, for example, a synthetic resin. The surface of the mounting guide body 2a has an engaging convex portion 9 and an engaging portion closer to the central portion in the longitudinal direction. A mating recess 10 is provided, and rivets or bolt mounting recesses 11 are provided on both ends thereof, and an engagement hole 12 (on the support 7 side of the leg 4 on the back side of the mounting guide body 2a). Positioning projections 13 are provided so as to engage with each other (see FIG. 2B).

  The engaging convex portion 9 of the column-side load collapse prevention guide 2 is formed in a truncated cone shape, and the engaging concave portion 10 is formed in a shape in which the engaging convex portion 9 can be fitted, and the engaging convex portion 9. It is formed slightly deeper than the height. Further, as shown in FIGS. 2 (a) and 2 (b), the support-side load collapse prevention guide 2 has an engaging convex portion 9 of the support-side load collapse prevention guide 2 on the surface of the mounting guide main body 2a. For positioning the engaging recess 10 so that the engaging recess 10 can be fitted to the engaging recess 10 or the engaging projection 9 of the load collapsing prevention guide 3 attached to the side rail 8 side of the leg 4 so that the engaging recess 10 can be engaged with the recess. A substantially V-shaped positioning mark 14 composed of two oblique lines 14a, 14a is formed. The inclination angle of each oblique line 14a is the same as the inclination angle α ° of the support column 7 of the leg 4 (see FIG. 1 (a)), for example, 6 °.

  4 and 5 show the load collapse prevention guide 3 attached to the side of the foot 4 of the leg 4. The traverse-side load collapse prevention guide 3 has the same configuration as the above-mentioned column-side load collapse prevention guide 2 and includes an attachment guide body 3a made of, for example, a synthetic resin. On the surface side, an engaging convex portion 9 and an engaging concave portion 10 are provided closer to the center portion in the longitudinal direction, rivets or bolt mounting concave portions 11 are provided on both end sides thereof, and the mounting guide main body 3a On the back side, a positioning projection 13 is provided so as to engage with an engaging hole 12 (see FIG. 4B) provided on the side of the foot 4a of the leg 4.

  The engagement convex portion 9 of the step rail side load collapse prevention guide 3 is also formed in a truncated cone shape, and the engagement concave portion 10 is formed in a shape in which the engagement convex portion 9 can be fitted, and the engagement convex portion. It is formed slightly deeper than the height of 9. Further, as shown in FIGS. 4 (a) and 4 (b), the treadle side load collapse prevention guide 3 has an engagement protrusion on the surface of the mounting guide body 3a. Positioning is performed so that the portion 9 or the engagement recess 10 can be attached to a position where the engagement recess 10 or the engagement protrusion 9 of the load collapse prevention guide 2 attached to the support column 7 side of the leg 4 can be engaged with the projection. A substantially C-shaped positioning mark 15 composed of two oblique lines 15a, 15a is formed. The inclination angle of each oblique line 15a is the same as the inclination angle α ° of the support column 7 of the leg 4 (see FIG. 1A), for example, 6 °.

  FIG. 6 shows a state where the guide rail-side load collapse prevention guide 3 is attached to the front side wall portion of the step rail 8, and FIG. 6A shows the mounting guide body 3 a attached to the front side wall portion 8 a of the step rail 8 by the blind rivet 16. In this case, a blind rivet 16 is passed through and fixed to the front side wall 8a of the step rail 8 from the mounting recess 11 of the mounting guide body 3a, and (b) is used to step on the mounting guide body 3a with a bolt 17. In the case of attaching to the front side wall portion 8a of the crosspiece 8, the bolt 17 is passed through the front side wall portion 8a of the stepping crosspiece 8 from the mounting recess 11, and the nut 18 is fastened and fixed.

  FIG. 7 shows a state in which the column-side load collapse prevention guide 2 is attached to the front side wall portion of the column 7, and (a) shows a case where the mounting guide body 2 a is attached to the front side wall portion 7 a of the column 7 by the blind rivet 16. A blind rivet 16 is passed through and fixed to the front side wall portion 7a of the column 7 from the mounting recess 11 of the mounting guide body 2a, and (b) is a bolt 17 that attaches the mounting guide body 2a to the front side wall of the column 7. In the case of attaching to the portion 7a, the bolt 17 is penetrated from the attachment concave portion 11 to the front side wall portion 7a of the support column 7, and the nut 18 is fastened and fixed.

  In addition, the column 7 of the leg 4 is made of a metal mold having a U-shaped cross section, and the front side wall portion 7a to which the column-side load collapse prevention guide 2 is attached is formed in an uneven shape. The back side of the guide body 2a for mounting of the collapsing prevention guide 2 is formed in an uneven shape corresponding to the uneven shape of the front side wall portion 7a.

  Further, when attaching the column-side load collapse prevention guide 2 to the column 7 and also when attaching the column-side load collapse prevention guide 3 to the step rail 8, the front side wall portion 7a of the column 7 and the front side wall portion 8a of the step rail 8 are Engagement holes 12 are provided at predetermined positions, and the positioning protrusions 13 of the load collapse prevention guides 2 and 3 are engaged with the engagement holes 12 (see FIG. 2 (b) and FIG. 4 (b)). The load collapse prevention guides 2 and 3 can be mounted quickly and accurately.

  As shown in FIGS. 1A and 1B, the column-side load collapse prevention guide 2 is attached to the upper end side of the front side walls of the left and right columns 7 and 7 in each leg 4, and As shown in FIG. 1 (a), the left and right load collapse prevention guides 2 and 2 on the both struts 7 and 7 side have the engaging convex portion 9 and the engaging concave portion 10 in opposite positions on the left and right. In addition, the load collapse prevention guide 2 of the left and right support columns 7 on the one leg 4 of the both legs 4, 4 is attached to the front and rear of the left and right support columns 7 on the other leg 4. The engagement convex portion 9 and the engagement concave portion 10 are attached to the load collapse prevention guide 2 so as to be opposite to each other on the left and right sides (see FIG. 1B).

  Further, as shown in FIG. 1 (a), the step rail side load collapse prevention guide 3 is provided on the front side wall portion of the lower side step rail 8 (the lowermost step rail 8a in this embodiment) in each leg 4. The left and right ends are attached to the required positions, and the load collapse prevention guide 3 of the one leg 4 and the load collapse prevention guide 3 of the other leg 4 correspond to the front and rear directions. The engaging projections 9 and the engaging recesses 10 are attached so as to be opposite to each other at the positions. This is because when the elevating platform 1 is stacked in the same direction, the engaging protrusions 9 and the engaging recesses 10 of the respective foot cross side load collapse prevention guides 3 of the one leg 4 facing each other are the other leg. This is because the concave and convex engagement with the engaging concave portion 10 and the engaging convex portion 9 of each of the stepped rail side load collapse prevention guides 4 is performed. Further, the position at which this stepped rail-side load collapse prevention guide 3 is attached to the lower stepped foot 8 is such that when the lifting platform 1 is stacked alternately, one leg is placed between the lifting platforms 1 and 1 that are stacked and opposed to each other. The engagement convex portion 9 or the engagement concave portion 10 of the column-side load collapse prevention guide 2 of the body 4 is engaged with the engagement concave portion 10 or the engagement convex portion 9 of the traverse-side load collapse prevention guide 3 of the opposite leg 4. It is a position where concave and convex can be fitted to. In this embodiment, the step rail side load collapse prevention guide 3 is attached to the lowermost step rail 8a of the leg 4, but may be attached to the second step rail 8 from the bottom.

  FIG. 8 is a plan view of a stacked state when a plurality of lifting platforms 1 are stacked in the same direction, and FIG. 9 is a front view of the same state. The engaging convex portions 9 and the engaging concave portions 10 of the respective strut-side load collapse prevention guides 2 of the one leg body 4 are engaged with the engaging concave portions 10 of the respective strut-side load collapse preventing guides 2 of the other opposing leg body 4 and The engaging projections 9 and the engaging recesses 10 of each of the traverse-side load collapse prevention guides 3 of the one leg 4 facing each other are fitted to the engaging projection 9 in an uneven manner. The engaging recesses 10 and the engaging protrusions 9 of each of the four opposing crossing-side load collapse prevention guides 3 are engaged with each other so that the collapse of the load is prevented.

  10 is a plan view of a stacked state when a plurality of lifts 1 are stacked such that the directions of the lifts 1 are staggered, FIG. 11 is a front view of the same state, and FIG. 12 is an arrow G in FIG. FIG. 13 is an enlarged view of a portion indicated by an arrow H in FIG. As described above with reference to FIGS. 11 to 13, between the lifting platforms 1 and 1 that are alternately stacked in this way, as shown in FIG. 11 to FIG. 13, the strut-side load collapse prevention guide 2 of the opposing leg 4 is engaged. The joint recesses 10 or the engagement projections 9 are respectively engaged with the engagement projections 9 or the engagement recesses 10 of each of the traverse-side load collapse prevention guides 3 of the other leg 4 facing each other, thereby being staggered. The collapse of the load in the state where it is stacked on the top is prevented.

  In addition, when attaching the column-side load collapse prevention guide 2 and the treadle-side load collapse prevention guide 3 to the column 7 side and the stepped-column 8 side of each leg 4, respectively, as shown in FIG. The diagonal line 14a of the positioning mark 14 provided in the column-side load collapse prevention guide 2 of one of the lifting platforms 1 in the state of being alternately stacked is the lower end edge 8ao of the lower step rail 8a of the other lifting platform 1. And the slanted line 15a of the positioning mark 15 provided on the step rail side load collapse prevention guide 3 of the other lifting platform 1 matches the inner edge 7ao of the column 7 of the one lifting platform 1. In addition, by attaching the load collapse prevention guides 2 and 3, when the lifting platform 1 is alternately stacked, the engagement concave portions 10 of the respective column side load collapse prevention guides 2 of the one leg 4 that overlap each other and face each other. Or engaging convex 9, it is possible to the engagement projection 9 or engagement recess 10 of each 踏桟 side stabilizing cargo guide 3 of the other leg 4 facing each securely uneven fit.

  In this case, since the inclination of the support column 7 is reversed at the left and right positions, depending on whether the support column side load collapse prevention guide 2 is attached to the left or right support column 7, the two oblique lines 14a and 14a of the support column side positioning mark 14 and the crossing bar The two oblique lines 15a and 15a of the side positioning mark 15 may be used separately. In addition, as in this embodiment, it is preferable to provide the positioning marks 14 and 15 on the column-side load collapse prevention guide 2 and the rail-side load collapse prevention guide 3, respectively. Even if only any one of 15 is provided, it is effective. That is, when only the column-side positioning mark 14 is provided, when the column-side load collapse prevention guide 2 is attached, the oblique line 14a of the column-side positioning mark 14 of one elevator 1 is set to the lower step of the other elevator 1 If it is made to coincide with the lower end edge 8ao of 8a, it becomes easy to mount the column-side load collapse prevention guide 2, and when only the step rail-side positioning mark 15 is provided, By attaching the oblique line 15a of the step rail side positioning mark 15 of one lifting platform 1 to the inner end edge 7ao of the column 7 of the other lifting platform 1, it is easy to mount the foot collapse prevention guide 3 It becomes.

  FIGS. 14 and 15 show another embodiment of the rail-side load collapse prevention guide 3 and the column-side load collapse prevention guide 2, and FIG. 14 shows the engaging protrusion 9 and the engaging recess 10 as legs. 4 is a sidewalk anti-load collapse prevention guide 3 formed in an elliptical cross section inclined by the same angle as the inclination angle α ° (for example, 6 °) of the column 4, (a) is a front view, and (b) is a plan view. (C) is a rear view and (d) is a side view. FIG. 15 shows the column-side load collapse prevention guide 2 in which the oval cross-section engagement convex portion 9 and the engagement concave portion 10 of the step rail-side load collapse prevention guide 3 shown in FIG. (B) is a plan view, (c) is a rear view, and (d) is a side view. The engaging projections 9 and the engaging recesses 10 of the column-side load collapse prevention guide 2 The side load collapse prevention guide 3 is formed in a long oval shape that can be engaged with the projections 9 and the engagement recesses 10 of the side load collapse prevention guide 3. According to such load collapse prevention guides 2 and 3, since the engaging convex portion 9 and the engaging concave portion 10 are each in an oval shape, the engaging convex portion 9 and the engaging concave portion 10 that are concavo-convexly fitted to each other are formed. Even if there is a slight misalignment, there is an advantage that it is easy to match.

(a) is the front view in the folded state of the folding type lifting platform which concerns on this invention, (b) is the side view. (a) is a front view of the column-side load collapse prevention guide, (b) is a plan view, and (c) is a rear view. 2A is a cross-sectional view taken along line AA in FIG. 2A, FIG. 2B is a cross-sectional view taken along line BB in FIG. 2, and FIG. 2C is a cross-sectional view taken along line CC in FIG. (a) is a front view of a railroad-side load collapse prevention guide, (b) is a plan view thereof, and (c) is a rear view. (a) is a side view of a guide for preventing collapse of a load on the side of a foot cross, (b) is a cross-sectional view taken along the line DD of FIG., (c) is a cross-sectional view taken along the line EE of FIG. It is the FF sectional view taken on the line of the figure. (a) is a cross-sectional view of a state where the rail-side load collapse prevention guide is attached to the rail with rivets, and (b) is a cross-sectional view of the state where the rail is attached with bolts and nuts. (a) is a cross-sectional view of a state in which the support-side load collapse prevention guide is attached to the support with rivets, and (b) is a cross-sectional view of the state in which the support is installed with bolts and nuts. It is a top view of the stacking state at the time of stacking an elevator stand in the same direction. It is a front view of the same state It is a top view of the stacking state at the time of stacking an elevator stand alternately. It is a front view of the same state. It is an enlarged view of the part shown by the arrow G of FIG. FIG. 11 is an enlarged view of a portion indicated by an arrow H in FIG. 10. An oval cross-section load-crash prevention guide with an engaging convex part and an engaging concave part that are inclined by the same angle as the inclination angle of the leg column, (a) is a front view, and (b) is a plan view. (C) is a rear view and (d) is a side view. 14 shows a column-side load collapse prevention guide in which an oval cross-section engagement convex portion and an engagement concave portion of the crosspiece side load collapse prevention guide shown in FIG. Is a plan view, (c) is a rear view, and (d) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lifting stand 2 Support | pillar side load collapse prevention guide 2a Guide body for installation of support column side load collapse prevention guide 3 Guide rail side load collapse prevention guide 3a Guide body for installation of side rail collapse prevention guide 4 Leg body 7 Support column 8 Step Crosspiece 9 Engaging projection 10 Engaging recess 11 Rivet or bolt mounting recess 14 Positioning mark 15 Positioning mark

Claims (5)

A pair of left and right support columns arranged in a substantially C shape are pivotally connected so that the upper ends of a pair of legs attached to a plurality of upper and lower steps can be folded into an open leg position and a folded position. A folding elevator,
Each leg is lifted up and down when stacked in the same direction or alternately on the side parts facing each other when stacking multiple lifting platforms in the folded position at the required part of the upper end of each column and the required part of the lower step A foldable lifting platform comprising an engagement convex part and an engagement concave part guide each having an engaging concave part and an engaging concave part that are fitted to each other between the bases.   Each load collapse prevention guide has a mounting guide main body, and an engaging convex portion and an engaging concave portion and a rivet or bolt mounting concave portion are provided on the surface side of the mounting guide main body. The foldable lifting platform according to 1.   The foldable lifting platform according to claim 2, wherein a positioning projection that engages with a positioning hole provided on a support column side or a pedestal side of a leg is provided on the back side of the mounting guide body.   On the guide body for mounting the load collapse prevention guide attached to the support column side of the leg body, the engagement unevenness portion of this support column side load collapse prevention guide has the engagement unevenness of the load collapse prevention guide mounted on the side of the leg. The foldable lifting platform according to claim 2 or 3, wherein a positioning mark is formed to be positioned so as to be attached to a position where the concave portion and the concave portion are fitted.   On the guide body for mounting the load collapse prevention guide attached to the foot crossing side of the leg body, the engagement unevenness part of this foot collage side load collapse prevention guide is engaged with the load collapse prevention guide attached to the leg column side. The foldable lifting platform according to claim 2 or 3, wherein a positioning mark is formed to be positioned so as to be attached at a position where the concavo-convex portion and the concavo-convex portion are fitted.

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