CN215126376U

CN215126376U - Folding step stool

Info

Publication number: CN215126376U
Application number: CN202120203816.XU
Authority: CN
Inventors: 朱雪林; 刘卫强; 姚柏松
Original assignee: Jiangsu Zhou Jijie Lntelligent Technology Co ltd
Current assignee: Jiangsu Zhou Jijie Lntelligent Technology Co ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-12-14
Anticipated expiration: 2031-01-25

Abstract

The utility model provides a folding step stool belongs to step stool technical field, has solved the relatively poor problem of prior art's folding step stool stability. One-level bench include the one-level front panel, respectively with one-level front panel both sides articulated one-level left side board and one-level right side board, with one-level front panel top articulated one-level roof, the second grade bench includes the second grade rear panel, respectively with second grade rear panel both sides articulated second grade left side board and second grade right side board, with second grade rear panel top articulated second grade roof, the second grade roof is higher than the one-level roof, second grade left side board and one-level left side board are articulated each other, second grade right side board and one-level right side board are articulated each other, be equipped with between one-level bench and the second grade bench with one-level left side board and second grade left side board, the bearing structure that one-level right side board and second grade right side board strutted. The utility model discloses a set up bearing structure and can strut one-level bench and second grade bench, provide sufficient stability, fold through inwards folding, conveniently carry or transport.

Description

Folding step stool

Technical Field

The utility model belongs to the technical field of the step ladder, particularly, relate to a folding step ladder.

Background

Traditional two step ladder stools is through once injection moulding, so can't fold and receive and release, lead to packing bulky, the cost of transportation is high, and the transport shifts more troublesome.

The existing foldable two-step ladder stool is generally divided into two types, one type adopts a scheme of middle folding, the structural stability is poor, the other type adopts full hinge connection, the ladder stool is easy to shake and poor in stability, and the stool surface of the existing two-step ladder stool is narrow and not good in comfort level.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a strong folding step ladder of stability to the above-mentioned problem that exists among the prior art.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a folding step stool, includes one-level bench and second grade bench, the one-level bench include the one-level front panel, respectively with one-level front panel both sides articulated one-level left side board and one-level right side board, with one-level front panel top articulated one-level roof, the second grade bench include the second grade rear panel, respectively with second grade rear panel both sides articulated second grade left side board and second grade right side board, with second grade rear panel top articulated second grade roof, the second grade roof be higher than the one-level roof, second grade left side board and one-level left side board articulated each other, second grade right side board and one-level right side board articulated each other, one-level bench and second grade bench between be equipped with the bearing structure who struts one-level left side board and second grade left side board, one-level right side board and second grade right side board.

The first-stage top plate is hinged to the top of the first-stage front panel, and the second-stage top plate is hinged to the top of the second-stage rear panel, so that the foldable bicycle is convenient to turn over and fold; set to each other through setting one-level left side board and second grade left side board and be articulated for each other, set to one-level right side board and second grade right side board and be articulated for each other, be convenient for inwards fold up folding, inwards folding area occupied is little, conveniently carry or transport and shift, when using this bench, bearing structure can strut one-level bench and second grade bench, prevents both curb plates and rotates owing to articulated, provides sufficient stability, and this folding bench can set up wideer bench face, has better comfort level.

In foretell folding step ladder, bearing structure including set up the connecting rod between one-level roof and second grade rear panel, connecting rod one end articulated with one-level roof lateral part, the other end is articulated with second grade rear panel, one-level bench and second grade bench open the time connecting rod and be the extension form with one-level roof.

The movable end of the first-stage top plate is connected with the connecting rod, so that when the first-stage top plate is turned and folded, the connecting rod drives the second-stage rear panel to be close to the first-stage front panel, and indirectly drives the first-stage right side plate, the second-stage right side plate, the first-stage left side plate and the second-stage left side plate to be folded and contracted inwards, and the folding is quick and convenient; when the first-level stool and the second-level stool are opened, the connecting rod and the first-level top plate are in an extending shape, so that the rotation of the hinged part of the first-level left side plate and the second-level left side plate and the rotation of the hinged part of the first-level right side plate and the second-level right side plate can be limited, and the stability is strong.

In foretell folding step ladder, as another kind of scheme, bearing structure including set up the connecting rod between one-level roof and second grade rear panel, connecting rod one end articulated with one-level roof lateral part, the other end is articulated with second grade rear panel, one-level bench and second grade bench when opening connecting rod and one-level roof be the form of extending, the connecting rod on still be equipped with the bracing piece, bracing piece one end articulated with the connecting rod, the other end is articulated with second grade roof.

The support rod is hinged to the connecting rod, so that the folding is more convenient while the stability is improved, the support rod can be driven by overturning the secondary top plate, the connecting rod can be driven by the support rod, and the primary top plate can be driven by the connecting rod to overturn; when the first-level stool and the second-level stool are opened, the connecting rod and the first-level top plate are in an extending shape, so that the rotation of the hinged part of the first-level left side plate and the second-level left side plate and the rotation of the hinged part of the first-level right side plate and the second-level right side plate can be limited, and the stability is strong.

In the folding step stool, a yielding port which can be used for yielding at the hinged position of the first-level top plate and the connecting rod when the folding step stool is in a furled state is arranged between the supporting rod and the connecting rod.

The hinge joint of the first-level top plate and the connecting rod can be matched with the supporting rod without interference when the folding step stool is in a furled state through the arrangement of the position-giving opening.

In the above folding step stool, the support rod is provided with a yielding groove which can prevent the interference between the connecting rod and the support rod when the folding step stool is in a furled state. The connecting rod and the supporting rod can not interfere with each other by arranging the abdicating groove.

In the folding step stool, when the folding step stool is folded, the inner sides or the outer sides of the first-stage left side plate and the second-stage left side plate are mutually attached, and the inner sides or the outer sides of the first-stage right side plate and the second-stage right side plate are mutually attached.

The folding direction of the first-stage left side plate and the second-stage left side plate can be selected alternatively, the folding direction of the first-stage right side plate and the second-stage right side plate can be selected alternatively, four folding combination schemes can be generated, the inner sides of the first-stage left side plate and the second-stage left side plate can be mutually attached, and the inner sides of the first-stage right side plate and the second-stage right side plate can be mutually attached; the outer sides of the first-stage left side plate and the second-stage left side plate are mutually attached, and the inner sides of the first-stage right side plate and the second-stage right side plate are mutually attached; the inner sides of the first-stage left side plate and the second-stage left side plate are mutually attached, and the outer sides of the first-stage right side plate and the second-stage right side plate are mutually attached; the outer sides of the first-stage left side plate and the second-stage left side plate are mutually attached, and the outer sides of the first-stage right side plate and the second-stage right side plate are mutually attached; the first is the best solution, and the most space-saving.

In foretell folding step ladder, one-level roof and one-level left side board, one-level right side board between be equipped with one-level lock joint structure respectively, one-level lock joint structure including set up respectively in the stopper at one-level left side board top and one-level right side board top, set up respectively in the spacing groove of one-level roof expansion end and second grade roof expansion end.

When can make this folding step ladder open through setting up one-level lock joint structure, one-level front panel both sides can not take place to rotate, and can not exert an influence to the upset of one-level roof, have restricted one-level left side board, one-level right side board through stopper and spacing groove cooperation respectively with the rotation of the articulated department of one-level front panel, increase stability.

In the above folding step stool, the second-stage top plate, the second-stage left side plate and the second-stage right side plate are respectively provided with a second-stage fastening structure.

When this folding step ladder opened, can not take place to rotate in second grade rear panel both sides through setting up second grade lock joint structure, and can not exert an influence to the upset of second grade roof.

In the above folding step stool, the second-stage fastening structure includes the limiting holes respectively disposed at the top of the second-stage left side plate and the top of the second-stage right side plate, and the limiting pins respectively disposed at the movable end of the first-stage top plate and the movable end of the second-stage top plate.

The rotation of the hinged positions of the second-level left side plate and the second-level right side plate and the second-level rear panel is limited through the matching of the limiting pin and the limiting hole, and the stability is improved.

In foretell folding step ladder, the face inwards of one-level bench and second grade bench be the grid form, the second grade roof on be equipped with the portable fretwork portion of being convenient for, one-level roof and second grade roof on be equipped with and be used for skid-proof anti-skidding line.

Through all setting one-level bench and second grade bench face inwards to the grid form, when having saved the material, guaranteed compressive property, set up the portable transport of being convenient for of fretwork portion on the second grade roof or hold it and retrieve folding, be used for the antiskid through set up anti-skidding line on one-level roof and second grade roof.

Compared with the prior art, the utility model is convenient for turning and folding by hinging the first-level top plate at the top of the first-level front plate and hinging the second-level top plate at the top of the second-level back plate; the first-stage left side plate and the second-stage left side plate are hinged with each other, and the first-stage right side plate and the second-stage right side plate are hinged with each other, so that the ladder stool is convenient to fold inwards and fold, the occupied area of inwards folding is small, and the ladder stool is convenient to convey or transport and transfer; the hinge joint of the first-stage left side plate and the first-stage right side plate is limited to rotate by arranging the first-stage fastening structure, and the hinge joint of the second-stage left side plate and the second-stage right side plate is limited to rotate by arranging the second-stage limiting structure, so that the stability is improved; the inward surfaces of the first-stage stool and the second-stage stool are arranged in a grid shape, so that materials are saved, and the compression resistance is guaranteed; be used for the antiskid through set up anti-skidding line on one-level roof and second grade roof, and this folding step ladder can set up wideer bench face, has better comfort level.

Drawings

Fig. 1 is a schematic perspective view of embodiment 1 of the present invention;

fig. 2 is a plan view of embodiment 1 of the present invention;

fig. 3 is a schematic view of a reverse structure of a first-level top plate according to embodiment 1 of the present invention;

fig. 4 is a schematic perspective view of a first-level left side plate and a first-level right side plate in embodiment 1 of the present invention;

fig. 5 is a schematic diagram of a reverse structure of a second-level top plate in embodiment 1 of the present invention;

fig. 6 is a schematic perspective view of a two-pole right side plate and a two-stage left side plate according to embodiment 1 of the present invention;

fig. 7 is a schematic perspective view of embodiment 2 of the present invention;

fig. 8 is a schematic structural view of embodiment 2 of the present invention in a folded state;

fig. 9 is a schematic structural view of the connecting rod and the supporting rod in a folded and furled state according to embodiment 2 of the present invention;

in the figure, 1, a first-stage stool; 11. a primary front panel; 12. a first-stage left side plate; 13. a first-stage right side plate; 14. A first-level top plate; 141. a limiting groove; 15. a limiting block; 2. a secondary stool; 21. a secondary rear panel; 22. a second-level left side plate; 23. a second-stage right side plate; 24. a secondary roof plate; 241. a hollow-out section; 242. a spacing pin; 25. A limiting hole; 3. a connecting rod; 4. anti-skid lines; 5. a support bar; 51. a let position port; 52. a yielding groove.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example 1

As shown in figures 1-6, the folding step stool comprises a first-level stool 1 and a second-level stool 2, wherein the first-level stool 1 comprises a first-level front panel 11, a first-level left side plate 12 and a first-level right side plate 13 which are respectively hinged with two sides of the first-level front panel 11, a first-level top plate 14 which is hinged with the top of the first-level front panel 11, the second-stage stool 2 comprises a second-stage back panel 21, a second-stage left side plate 22 and a second-stage right side plate 23 which are respectively hinged with two sides of the second-stage back panel 21, a second-stage top plate 24 which is hinged with the top of the second-stage back panel 21, the second-level top plate 24 is higher than the first-level top plate 14, the second-level left side plate 22 is hinged with the first-level left side plate 12, second grade right side board 23 and one-level right side board 13 articulated each other, one-level bench 1 and second grade bench 2 between be equipped with the bearing structure who struts one-level left side board 12 and second grade left side board 22, one-level right side board 13 and second grade right side board 23.

The top of the first-stage front panel 11 is hinged with the first-stage top plate 14, and the top of the second-stage rear panel 21 is hinged with the second-stage top plate 24, so that the foldable bicycle is convenient to turn over; set to each other to be articulated through setting one-level left side board 12 and second grade left side board 22, one-level right side board 13 sets to each other to be articulated with second grade right side board 23, be convenient for inwards fold up folding, inwards folding area occupied is little, convenient transport or transport shift, when using this bench, bearing structure can strut one-level bench 1 and second grade bench 2, prevent both curb plates because articulated and rotate, provide sufficient stability, and this bench can set up wideer bench face, has better comfort level.

When the folding step stool is folded, the inner sides or the outer sides of the first-stage left side plate 12 and the second-stage left side plate 22 are mutually attached, and the inner sides or the outer sides of the first-stage right side plate 13 and the second-stage right side plate 23 are mutually attached.

The folding direction of the first-stage left side plate 12 and the second-stage left side plate 22 can be selected alternatively, the folding direction of the first-stage right side plate 13 and the second-stage right side plate 23 can be selected alternatively, four folding combination schemes can be generated, the inner sides of the first-stage left side plate 12 and the second-stage left side plate 22 can be mutually attached, and the inner sides of the first-stage right side plate 13 and the second-stage right side plate 23 can be mutually attached; the outer sides of the first-stage left side plate 12 and the second-stage left side plate 22 can be mutually attached, and the inner sides of the first-stage right side plate 13 and the second-stage right side plate 23 can be mutually attached; the inner sides of the first-stage left side plate 12 and the second-stage left side plate 22 can be mutually attached, and the outer sides of the first-stage right side plate 13 and the second-stage right side plate 23 can be mutually attached; the outer sides of the first-stage left side plate 12 and the second-stage left side plate 22 can be mutually attached, and the outer sides of the first-stage right side plate 13 and the second-stage right side plate 23 can be mutually attached; the first is the best solution, and the most space-saving.

The bearing structure including set up connecting rod 3 between one-level roof 14 and second grade

rear panel

21, 3 one end of connecting rod articulated with one-level roof 14 lateral part, the other end is articulated with second grade rear panel 21, one-level bench 1 and second grade bench 2 when opening connecting rod 3 and one-level roof 14 are the extension form.

The movable end of the first-stage top plate 14 is connected with the connecting rod 3, so that when the first-stage top plate 14 is turned and folded, the connecting rod 3 drives the second-stage rear panel 21 to be close to the first-stage front panel 11, and indirectly drives the first-stage right side plate 13, the second-stage right side plate 23, the first-stage left side plate 12 and the second-stage left side plate 22 to be folded and contracted inwards, and the folding is quick and convenient; when the first-stage stool 1 and the second-stage stool 2 are opened, the connecting rod 3 and the first-stage top plate 14 are in an extending shape, so that the rotation of the hinged part of the first-stage left side plate 12 and the second-stage left side plate 22 and the rotation of the hinged part of the first-stage right side plate 13 and the second-stage right side plate 23 can be limited, and the stability is high.

The sum of the widths of the first-stage left side plate 12 and the first-stage right side plate 13 is smaller than the width of the first-stage front panel 11, and the width of the second-stage left side plate 22 and the second-stage right side plate 23 is smaller than the width of the second-stage rear panel 21.

By setting the sum of the widths of the first-level left side plate 12 and the first-level right side plate 13 to be smaller than the width of the first-level front panel 11, and the width of the second-level rear panel 21 to be smaller than the width of the second-level left side plate 22 and the width of the second-level right side plate 23, the width of the first-level stool 1 and the second-level stool 2 after being folded can be minimized, and the interference of the supporting structure is avoided.

And a first-stage buckling structure is respectively arranged between the first-stage top plate 14 and the first-stage left side plate 12 and between the first-stage right side plate 13. When the folding step stool is opened by arranging the one-level fastening structure, the two sides of the one-level front panel 11 cannot rotate, and the turning of the one-level top plate 14 cannot be influenced.

The first-stage fastening structure comprises a limiting block 15 arranged at the top of the first-stage left side plate 12 and the top of the first-stage right side plate 13 respectively, and a limiting groove 141 arranged at the movable end of the first-stage top plate 14 and the movable end of the second-stage top plate 24 respectively.

The rotation of the hinged positions of the first-level left side plate 12 and the first-level right side plate 13 and the first-level front panel 11 is limited through the matching of the limiting block 15 and the limiting groove 141, and the stability is improved.

And a secondary fastening structure is respectively arranged between the secondary top plate 24 and the secondary left side plate 22 and between the secondary right side plate 23. When this folding step ladder opened, can make this folding step ladder open through setting up second grade fastening structure, the rotation can not take place for second grade rear panel 21 both sides, and can not exert an influence to the upset of second grade roof 24.

The second-stage fastening structure comprises a limiting hole 25 respectively arranged at the top of the second-stage left side plate 22 and the top of the second-stage right side plate 23, and a limiting pin 242 respectively arranged at the movable end of the first-stage top plate 14 and the movable end of the second-stage top plate 24.

The rotation of the hinged positions of the second-stage left side plate 22 and the second-stage right side plate 23 and the second-stage rear panel 21 is limited through the matching of the limiting pin 242 and the limiting hole 25, and the stability is improved.

The inward surfaces of the first-stage stool 1 and the second-stage stool 2 are both in a grid shape. The inward surfaces of the first-stage stool 1 and the second-stage stool 2 are all arranged to be grid-shaped, so that the compression resistance is guaranteed while materials are saved. The second-stage top plate 24 is provided with a hollow portion 241 convenient to carry, and the first-stage top plate 14 and the second-stage top plate 24 are provided with anti-skid lines 4 for skid resistance. The hollow portion 241 is arranged on the second-stage top plate 24, so that the second-stage top plate can be conveniently carried by hand or held for recovery and folding, and the anti-skid lines 4 are arranged on the first-stage top plate 14 and the second-stage top plate 24 and used for skid prevention.

Example 2

As shown in fig. 7-8, the present embodiment has the same basic structure principle as embodiment 1, except that a support rod 5 is further disposed on the connecting rod 3, and one end of the support rod 5 is hinged to the connecting rod 3, and the other end is hinged to the secondary top plate 24. Through articulated bracing piece 5 on connecting rod 3, when increaseing stability, it is more convenient to fold, and upset second grade roof 24 can drive bracing piece 5, and bracing piece 5 can drive connecting rod 3, and connecting rod 3 can drive the 14 upsets of one-level roof again.

A yielding opening 51 for yielding the hinged part of the first-level top plate 14 and the connecting rod 3 when the folding step stool is in a furled state is arranged between the supporting rod 5 and the connecting rod 3. The position-giving opening 51 can make the hinged position of the first-stage top plate 14 and the connecting rod 3 inosculate with the supporting rod 5 when the folding step stool is in the folding state, and the interference is avoided.

The support bar 5 is provided with a abdicating groove 52 which can prevent the interference between the connecting rod 3 and the support bar 5 when the folding step stool is in a folded state. The link 3 and the support rod 5 do not interfere with each other by providing the receding groove 52.

The utility model discloses the theory of operation: when the folding state needs to be changed into the unfolding state, the first-stage left side plate 12, the first-stage right side plate 13, the second-stage left side plate 22 and the second-stage right side plate 23 are stretched outwards, when the first-stage top plate 14 is stretched to a certain degree, the limiting groove 141 at the bottom of the first-stage top plate 14 is turned over to be aligned to the limiting block 15 at the top of the first-stage left side plate 12 and the limiting block 15 at the top of the first-stage right side plate 13 to achieve limiting, the limiting pin 242 at the bottom of the second-stage top plate 24 is turned over to be aligned to the limiting hole 25 at the top of the second-stage left side plate 22 and the second-stage right side plate 23 to achieve limiting, at the moment, the connecting rod 3 is horizontal, and the first-stage stool 1 and the second-stage stool 2 are unfolded; when the unfolding state is required to be changed into the folding state, the first-stage top plate 14 and the second-stage top plate 24 are directly turned upwards, the first-stage top plate 14 can drive the connecting rod 3 hinged with the first-stage top plate to rotate upwards, the connecting rod 3 rotates to drive the second-stage rear panel 21 to approach the first-stage front panel 11, and meanwhile, the first-stage left side plate 12, the first-stage right side plate 13, the second-stage left side plate 22 and the second-stage right side plate 23 are folded inwards and folded until the first-stage top plate and the second-stage top plate can not approach the first-stage front panel any more, and the folding is finished at the moment.

The utility model is convenient for turning and folding by hinging the first-stage top plate 14 at the top of the first-stage front panel 11 and the second-stage top plate 24 at the top of the second-stage rear panel 21; the first-stage left side plate 12 and the second-stage left side plate 22 are hinged to each other, the first-stage right side plate 13 and the second-stage right side plate 23 are hinged to each other, inward folding and folding are facilitated, the occupied area of inward folding is small, conveying or carrying and transferring are facilitated, when the ladder stool is used, the first-stage stool 1 and the second-stage stool 2 can be propped open by the supporting structure, the side plates of the first-stage stool and the second-stage stool are prevented from rotating due to hinging, and sufficient stability is provided; the hinge joint of the first-stage left side plate 12 and the first-stage right side plate 13 is limited to rotate by arranging the first-stage buckling structure, and the hinge joint of the second-stage left side plate 22 and the second-stage right side plate 23 is limited to rotate by arranging the second-stage limiting structure, so that the stability is improved; the inward surfaces of the first-stage stool 1 and the second-stage stool 2 are both arranged in a grid shape, so that the compression resistance is ensured while materials are saved; be used for the antiskid through set up anti-skidding line 4 on one-level roof 14 and second grade roof 24, and this folding step ladder can set up wideer bench face, has better comfort level.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a folding step stool, includes one-level bench (1) and second grade bench (2), its characterized in that: one-level bench (1) include one-level front panel (11), respectively with one-level front panel (11) both sides articulated one-level left side board (12) and one-level right side board (13), with one-level front panel (11) top articulated one-level roof (14), second level bench (2) include second grade rear panel (21), respectively with second grade rear panel (21) both sides articulated second grade left side board (22) and second grade right side board (23), with second grade rear panel (21) top articulated second grade roof (24), second grade roof (24) be higher than one-level roof (14), second grade left side board (22) and one-level left side board (12) articulated each other, second grade right side board (23) and one-level right side board (13) articulated each other, one-level bench (1) and second level bench (2) between be equipped with one-level left side board (12) and second grade left side board (22), The supporting structure is propped open by the first-stage right side plate (13) and the second-stage right side plate (23).

2. A folding step ladder as claimed in claim 1, wherein: the supporting structure comprises a connecting rod (3) arranged between a first-level top plate (14) and a second-level back panel (21), one end of the connecting rod (3) is hinged to the side of the first-level top plate (14), the other end of the connecting rod is hinged to the second-level back panel (21), and the connecting rod (3) and the first-level top plate (14) are stretched when the first-level stool (1) and the second-level stool (2) are opened.

3. A folding step ladder as claimed in claim 1, wherein: bearing structure including setting up connecting rod (3) between one-level roof (14) and second grade rear panel (21), connecting rod (3) one end articulated with one-level roof (14) lateral part, the other end is articulated with second grade rear panel (21), one-level bench (1) and second grade bench (2) when opening connecting rod (3) and one-level roof (14) be the form of extending, connecting rod (3) on still be equipped with bracing piece (5), bracing piece (5) one end articulated with connecting rod (3), the other end is articulated with second grade roof (24).

4. A folding step ladder as claimed in claim 3, wherein: a yielding opening (51) which can be used for yielding the hinged part of the first-level top plate (14) and the connecting rod (3) when the folding step stool is in a furled state is arranged between the supporting rod (5) and the connecting rod (3).

5. A folding step ladder according to claim 3 or 4, characterised in that: the support rod (5) is provided with a abdicating groove (52) which can prevent the interference between the connecting rod (3) and the support rod (5) when the folding step stool is in a furled state.

6. A folding step ladder according to claim 1 or 2 or 3 or 4, characterised in that: when the folding step stool is folded, the inner sides or the outer sides of the first-stage left side plate (12) and the second-stage left side plate (22) are mutually attached, and the inner sides or the outer sides of the first-stage right side plate (13) and the second-stage right side plate (23) are mutually attached.

7. A folding step ladder according to claim 1 or 2 or 3 or 4, characterised in that: one-level roof (14) and one-level left side board (12), one-level right side board (13) between be equipped with one-level fastening structure respectively, one-level fastening structure including set up in stopper (15) at one-level left side board (12) top and one-level right side board (13) top respectively, set up in spacing groove (141) of one-level roof (14) expansion end and second grade roof (24) expansion end respectively.

8. A folding step ladder according to claim 1 or 2 or 3 or 4, characterised in that: and two-stage buckling structures are respectively arranged between the two-stage top plate (24) and the two-stage left side plate (22) and between the two-stage right side plate (23).

9. The folding step ladder of claim 8, wherein: the second-stage buckling structure comprises limiting holes (25) which are respectively arranged at the top of the second-stage left side plate (22) and the top of the second-stage right side plate (23), and limiting pins (242) which are respectively arranged at the movable end of the first-stage top plate (14) and the movable end of the second-stage top plate (24).

10. A folding step ladder according to claim 1 or 2 or 3 or 4, characterised in that: the portable anti-skidding stool is characterized in that the inward surfaces of the first-stage stool (1) and the second-stage stool (2) are grid-shaped, a hollow portion (241) convenient to carry is arranged on the second-stage top plate (24), and anti-skidding lines (4) used for skidding are arranged on the first-stage top plate (14) and the second-stage top plate (24) respectively.