阅读说明：本技术 一种附着式升降脚手架 (Attached lifting scaffold ) 是由 侯建国 顾昕 孙跃 于 2021-08-12 设计创作，主要内容包括：本申请涉及一种附着式升降脚手架,包括若干沿竖直方向依次设置的架体,架体上设置工作台,相邻两个工作台之间设置有楼梯；楼梯包括底座和若干台阶组件,底座的上、下两端连接上、下相邻两个工作台；底座沿斜向下呈倾斜设置,若干台阶组件沿长度方向依次设置在底座的上端面上；台阶组件包括踩踏板和支撑板,支撑板竖向设置,踩踏板水平设置,踩踏板的一端与底座的上端面转动连接、另一端与支撑板顶部转动连接,支撑板的底部插设在底座上；底座上设置有控制装置,控制装置能够带动支撑板底部与底座分离并使踩踏板和支撑板均运动至与底座的上端面平行；本申请能够使楼梯供人使用的同时方便滑动货物。(The application relates to an attached lifting scaffold, which comprises a plurality of frame bodies sequentially arranged along the vertical direction, wherein the frame bodies are provided with working tables, and a stair is arranged between every two adjacent working tables; the stair comprises a base and a plurality of step components, wherein the upper end and the lower end of the base are connected with two upper and lower adjacent workbenches; the base is obliquely arranged downwards, and the plurality of step components are sequentially arranged on the upper end surface of the base along the length direction; the step assembly comprises a pedal and a supporting plate, the supporting plate is vertically arranged, the pedal is horizontally arranged, one end of the pedal is rotatably connected with the upper end face of the base, the other end of the pedal is rotatably connected with the top of the supporting plate, and the bottom of the supporting plate is inserted on the base; the base is provided with a control device, and the control device can drive the bottom of the supporting plate to be separated from the base and enable the pedal and the supporting plate to move to be parallel to the upper end face of the base; this application can make convenient slip goods when stair confession people used.)

1. An attached lifting scaffold comprises a plurality of frame bodies (1) which are sequentially arranged along the vertical direction, wherein the frame bodies (1) are provided with work tables (2), and a stair (10) is arranged between every two adjacent work tables (2); the method is characterized in that: the stair (10) comprises a base (5) and a plurality of step assemblies, wherein the upper end and the lower end of the base (5) are connected with two upper and lower adjacent workbenches (2); the base (5) is obliquely arranged downwards, and the step assemblies are sequentially arranged on the upper end surface of the base (5) along the length direction; the step assembly comprises a pedal (3) and a support plate (4), the support plate (4) is vertically arranged, the pedal (3) is horizontally arranged, one end of the pedal (3) is rotatably connected with the upper end face of the base (5), the other end of the pedal is rotatably connected with the top of the support plate (4), and the bottom of the support plate (4) is inserted on the base (5); the pedal is characterized in that a control device is arranged on the base (5), and the control device can drive the bottom of the supporting plate (4) to be separated from the base (5) and enable the pedal (3) and the supporting plate (4) to move to be parallel to the upper end face of the base (5).

2. The attached lifting scaffold of claim 1, wherein: a plurality of inserting grooves (51) which correspond to the supporting plates (4) one by one are vertically formed in the upper end face of the base (5) along the length direction, the bottoms of the supporting plates (4) are inserted into the inserting grooves (51), and movable chambers (52) communicated with all the inserting grooves (51) are formed in the base (5); the control device comprises a butt joint plate (6) and a plurality of butt joint blocks (7) which correspond to the insertion grooves (51) one by one, the butt joint blocks (7) are arranged on the butt joint plate (6), the top end faces of the butt joint blocks (7) are flush with the upper end face of the base (5), the butt joint plate (6) is positioned in the movable cavity (52) in a sliding mode along the vertical direction, the butt joint blocks (7) are in insertion fit in the corresponding insertion grooves (51) in a splicing mode, and the tops of the butt joint blocks are abutted to the bottoms of the support plates (4); and a driving piece (101) for driving the abutting plate (6) to move is further arranged on the inner wall of the movable chamber (52).

3. The attached lifting scaffold of claim 2, wherein: the control device also comprises a leveling component, the leveling component comprises a plurality of push rods (81) which correspond to the support plates (4) one by one, and the push rods (81) are in plug-in fit on the upper end surface of the base (5) along the horizontal direction; after the bottom of the supporting plate (4) is ejected out of the inserting groove (51) by the abutting block (7), the push rod (81) can move towards the corresponding supporting plate (4) and abut against the bottom of the supporting plate (4), and the push rod (81) drives the bottom of the corresponding supporting plate (4) to move downwards along the upper end face of the base (5).

4. The attached lifting scaffold of claim 3, wherein: the pushing and leveling assembly further comprises a driving rod (82), the driving rod (82) is arranged on the abutting plate (6), and an inclined end is arranged on the driving rod (82); when the abutting plate (6) moves to the abutting block (7) to eject the supporting plate (4) out of the insertion groove (51), the abutting plate (6) continues to move upwards and drives the driving rod (82) to move, the inclined end of the driving rod (82) abuts against the push rod (81), and the push rod (81) moves towards the corresponding supporting plate (4) and abuts against the bottom of the supporting plate (4).

5. The attached lifting scaffold of claim 4, wherein: a plurality of pushing grooves (53) arranged along the length direction are formed in the upper end face of the base (5), openings of the pushing grooves (53) are horizontally arranged and are in inserted fit with the push rod (81), a plurality of driving grooves (54) arranged along the length direction are formed in the upper end face of the base (5), openings of the driving grooves (54) are vertically arranged and are simultaneously communicated with the pushing grooves (53) and the movable cavity (52), and the driving rods (82) are inserted into the driving grooves (54); the side wall of the driving rod (82) facing the push rod (81) is provided with a top block (821), the top block (821) is provided with an inclined end, the driving rod (82) and the top block (821) can jointly enter the push groove (53), the inclined end of the top block (821) abuts against the push rod (81) after the top block (821) enters the push groove (53) and drives the push rod (81) to abut against the support plate (4); the driving rod (82) moves upwards to enable the top block (821) to leave the push groove (53) upwards.

6. The attached lifting scaffold of claim 5, wherein: the control device also comprises a plurality of reset rods (9) which are in one-to-one correspondence with the pedals (3), and the reset rods (9) are vertically arranged on the abutting plate (6); a plurality of reset grooves (55) which are arranged along the length direction of the base (5) are formed in the upper end surface of the base (5), and the reset grooves (55) are communicated with the movable chamber (52); when actuating lever (82) drive push rod (81) butt backup pad (4) back, butt joint board (6) continue the rebound, butt joint board (6) drive release link (9) and pass and correspond reset groove (55), release link (9) and the bottom butt of step (3) and will step (3) jack-up.

7. The attached lifting scaffold of claim 6, wherein: the abutting block (7) comprises a connecting part (71) and a working part (72), the working part (72) is in inserting fit in the inserting groove (51), and the connecting part (71) is located at the bottom of the working part (72) and can abut against the inner wall of the movable chamber (52) at the opening of the inserting groove (51); the upper end face of the abutting plate (6) is provided with a plurality of connecting grooves (61) which correspond to the connecting parts (71) one by one, the connecting parts (71) are in inserted fit in the corresponding connecting grooves (61), and the side walls of the connecting parts (71) are in extrusion contact with the inner side walls of the connecting grooves (61); and a gap is formed between the bottom of the connecting part (71) and the bottom of the connecting groove (61).

8. The attached lifting scaffold of claim 7, wherein: two opposite side walls of the working part (72) are provided with limit blocks (721), two opposite side inner walls of the inserting groove (51) are provided with limit grooves (56) along the vertical direction, and the limit blocks (721) are positioned in the limit grooves (56) in a sliding manner; when the top end of the working part (72) is positioned at the opening at the upper end of the inserting groove (51), the limiting block (721) is abutted against the side wall at the top of the limiting groove (56), and when the bottom of the supporting plate (4) enters the inserting groove (51) and is abutted against the working part (72), the limiting block (721) is abutted against the side wall at the bottom of the limiting groove (56).

9. The attached lifting scaffold of claim 1, wherein: the two adjacent step assemblies are arranged at intervals, and when the pedal (3) rotates downwards until the supporting plate (4) and the pedal (3) are parallel to the upper end face of the base (5), the supporting plate (4) and the pedal (3) on the adjacent step assembly below form an interval.

10. The attached lifting scaffold of claim 9, wherein: base (5) are provided with between two adjacent step subassemblies and step on groove (57), the tank bottom of stepping on groove (57) is the level setting, works as the up end level back of backup pad (4) and base (5), backup pad (4) will step on the opening cover in groove (57).

Technical Field

The application relates to the field of scaffolds, in particular to an attached lifting scaffold.

Background

Present inserted lift scaffold includes a plurality of support bodies that set up along vertical direction, is provided with the workstation that the staff of being convenient for stood in the support body, and people carry out the operation on the workstation.

In order to facilitate people to move to the next frame body from the frame body, a stair is usually arranged between two work tables which are adjacent up and down, and a worker moves to the work table below from the work table through the stair.

When people need transport goods to the next working platform through stairs, the stair-type stairs affect the convenience of transporting goods, people are difficult to slide the goods down the stairs, active transport is needed, and an improved space exists.

Disclosure of Invention

Make things convenient for the goods to go down from stair in order to make the stair be convenient for the people to trample, this application provides an inserted lift scaffold.

The application provides an attached lifting scaffold adopts following technical scheme:

an attached lifting scaffold comprises a plurality of frame bodies which are sequentially arranged along the vertical direction, wherein the frame bodies are provided with working tables, and a stair is arranged between every two adjacent working tables; the stair comprises a base and a plurality of step components, wherein the upper end and the lower end of the base are connected with two upper and lower adjacent workbenches; the base is obliquely arranged downwards, and the step assemblies are sequentially arranged on the upper end surface of the base along the length direction; the step assembly comprises a pedal and a supporting plate, the supporting plate is vertically arranged, the pedal is horizontally arranged, one end of the pedal is rotatably connected with the upper end face of the base, the other end of the pedal is rotatably connected with the top of the supporting plate, and the bottom of the supporting plate is inserted on the base; the base is provided with a control device, and the control device can drive the bottom of the supporting plate to be separated from the base and enable the pedal and the supporting plate to move to be parallel to the upper end face of the base.

By adopting the technical scheme, when a person uses the stairs, the pedal is horizontally arranged for the person to tread, the supporting plate is vertically arranged, the inserting block is inserted into the base to play a supporting role, and the person can move to another workbench through the stairs; when the goods need to slide downwards through the stairs, the inserting block is driven to be separated from the base through the control device, the pedal and the supporting plate are driven to be in an active state at the moment, the control device drives the pedal and the supporting plate to rotate and be tiled on the upper end face of the base, and the goods can slide down from the pedal and the supporting plate at the moment.

Optionally, a plurality of insertion grooves corresponding to the support plates one to one are vertically formed in the upper end surface of the base along the length direction, the bottoms of the support plates are inserted into the insertion grooves, and a movable cavity communicated with all the insertion grooves is formed in the base; the control device comprises a butting plate and a plurality of butting blocks which are in one-to-one correspondence with the insertion grooves, the butting blocks are arranged on the butting plate, the top end surfaces of the butting blocks are flush with the upper end surface of the base, the butting plate is positioned in the movable cavity in a sliding mode along the vertical direction, the butting blocks are inserted and matched in the corresponding insertion grooves, and the tops of the butting blocks are butted with the bottoms of the supporting plates; and a driving piece for driving the abutting plate to move is further arranged on the inner wall of the movable cavity.

Through adopting above-mentioned technical scheme, the step subassembly is many, and it is very troublesome to pull out the backup pad one by one, and when butt slab drove the vertical upward movement of butt piece, the butt piece can be with the direct ejecting inserting groove of backup pad.

Optionally, the control device further comprises a leveling assembly, the leveling assembly comprises a plurality of push rods in one-to-one correspondence with the support plates, and the push rods are inserted and matched on the upper end surface of the base along the horizontal direction; when the bottom of the supporting plate is ejected out of the inserting groove by the abutting block, the push rod can move towards the corresponding supporting plate and abut against the bottom of the supporting plate, and the push rod drives the bottom of the corresponding supporting plate to move downwards along the upper end face of the base.

Through adopting above-mentioned technical scheme, the push rod drives the backup pad and moves down along the up end of base after the backup pad is by jack-up, prevents backup pad bottom card on the up end of base or butt joint piece.

Optionally, the pushing assembly further comprises a driving rod, the driving rod is arranged on the abutting plate, and an inclined end is arranged on the driving rod; when the abutting plate moves to the abutting block to eject the supporting plate out of the insertion groove, the abutting plate continues to move upwards and drives the driving rod to move, the inclined end of the driving rod abuts against the push rod, and the push rod moves towards the corresponding supporting plate and abuts against the bottom of the supporting plate.

Through adopting above-mentioned technical scheme, the butt plate further controls the push rod motion through the actuating lever for the action process is succinct more.

Optionally, a plurality of push grooves arranged in the length direction are formed in the upper end surface of the base, openings of the push grooves are horizontally arranged and are in plug-in fit with the push rods, a plurality of driving grooves arranged in the length direction are formed in the upper end surface of the base, openings of the driving grooves are vertically arranged and are simultaneously communicated with the push grooves and the movable chamber, and the driving rods are inserted into the driving grooves; the side wall of the driving rod facing the push rod is provided with a top block, the top block is provided with an inclined end, the driving rod and the top block can jointly enter the push groove, and the inclined end of the top block abuts against the push rod and drives the push rod to abut against the support plate after the top block enters the push groove; the driving rod moves upwards to enable the top block to leave the push groove upwards.

Through adopting above-mentioned technical scheme, make the vertical upward movement of actuating lever drive push rod horizontal migration and promote the backup pad through the setting up of kicking block, play good linkage effect.

Optionally, the control device further comprises a plurality of reset rods in one-to-one correspondence with the pedals, and the reset rods are vertically arranged on the abutting plate; the upper end surface of the base is provided with a plurality of reset grooves which are arranged along the length direction of the base, and the reset grooves are communicated with the movable cavity; when the actuating lever drives behind the push rod butt backup pad, the butt board continues the rebound, the butt board drives the release link and passes and correspond the groove that resets, the bottom butt of release link and pedal and will pedal jack-up.

Through adopting above-mentioned technical scheme, continue the rebound butt joint board after pedal and backup pad are paved, the butt joint board moves the release link, and the release link is with pedal's bottom jack-up for the bottom of backup pad is relative with corresponding the inserting groove, makes butt joint board rebound again, and release link and butt piece all move down, make the backup pad bottom can enter into the inserting groove again, make step subassembly automatic re-setting, removed operating personnel manual work from.

Optionally, the abutting block comprises a connecting part and a working part, the working part is inserted and matched in the insertion groove, and the connecting part is located at the bottom of the working part and can abut against the inner wall of the movable chamber at the opening of the insertion groove; the upper end surface of the abutting plate is provided with a plurality of connecting grooves which are in one-to-one correspondence with the connecting parts, the connecting parts are in inserted fit in the corresponding connecting grooves, and the side walls of the connecting parts are in extrusion contact with the inner side walls of the connecting grooves; and a gap is formed between the bottom of the connecting part and the bottom of the connecting groove.

By adopting the technical scheme, because connecting portion and spread groove inner wall frictional force are great, butt joint board and connecting portion together rebound, the work portion is pegged graft in the inserting groove, and connecting portion are located movable cavity, and when the work portion top was located the opening part at inserting groove top, connecting portion and activity cavity butt, work portion stopped rebound, played limiting displacement, and butt joint board relative connection portion continued rebound this moment, was convenient for carry on follow-up action.

Optionally, two opposite side walls of the working part are provided with limiting blocks, two opposite inner walls of the insertion groove are provided with limiting grooves along the vertical direction, and the limiting blocks are slidably positioned in the limiting grooves; when the top of work portion is located the opening part of inserting groove upper end, the lateral wall butt of stopper and spacing groove top works as the backup pad bottom enters into the inserting groove in with the work portion butt, the lateral wall butt of stopper and spacing tank bottom.

Through adopting above-mentioned technical scheme, because the setting of connecting portion and spread groove, when the backup pad is inserted and is established in the inserting groove, the backup pad butt is inserted and is connect the piece and easily make the piece of pegging graft move down, and the step subassembly is shakiness, and the setting up of stopper and spacing groove makes the step subassembly reset back stopper and the lateral wall butt of spacing tank bottom, prevents that the backup pad from moving down.

Optionally, the step assemblies are arranged at intervals, and when the pedal rotates downwards until the support plate and the pedal are parallel to the upper end face of the base, an interval is formed between the support plate and the pedal on the adjacent step assembly below.

Through adopting above-mentioned technical scheme, the interval setting between the step subassembly has played the effect that prevents backup pad and pedal and overlap.

Optionally, the base is provided with between two adjacent step subassemblies and tramples the groove, tramples the tank bottom in groove and be the level setting, works as the backup pad is horizontal back with the up end of base, the backup pad will trample the opening cover in groove.

Through adopting above-mentioned technical scheme, because there is the interval between two adjacent step subassemblies, the people steps on the interval easily and falls down, tramples the setting up of groove and makes the people more steady at the process of walking the stair.

In summary, the present application includes at least one of the following beneficial technical effects:

when a person uses the stairs, the pedal is horizontally arranged for the person to step, the supporting plate is vertically arranged, the insertion block is inserted into the base to play a supporting role, and the person can move to another workbench through the stairs; when goods need to slide down through stairs, the control device drives the insertion block to be separated from the base, the pedal and the support plate are driven to be movably arranged at the moment, the control device drives the pedal and the support plate to rotate and be tiled on the upper end face of the base, and the goods can slide down from the pedal and the support plate at the moment; meanwhile, the control device can also drive the step assembly to reset, so that the operator saves more labor.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic structural view of a staircase according to an embodiment of the present application;

FIG. 3 is a schematic view, partially in section, of a staircase according to an embodiment of the present application;

FIG. 4 is an enlarged schematic view at A in FIG. 3;

FIG. 5 is a schematic cross-sectional view of a push rod and compression spring in an embodiment of the present application.

Description of reference numerals: 1. a frame body; 11. a fence; 12. a support frame; 2. a work table; 21. a stair opening; 3. treading a pedal; 4. a support plate; 5. a base; 51. inserting grooves; 52. a movable chamber; 53. pushing the groove; 54. a drive slot; 55. a reset groove; 56. a limiting groove; 57. treading the groove; 58. a spring slot; 6. a butt joint plate; 61. connecting grooves; 7. a butting block; 71. a connecting portion; 72. a working part; 721. a limiting block; 81. a push rod; 811. a compression spring; 82. a drive rod; 821. a top block; 822. a spring plate; 9. a reset lever; 10. a staircase; 101. a drive member.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses inserted lift scaffold, refer to fig. 1, including two support bodies 1 that set gradually along vertical, in the equal fixedly connected with support frame 12 in four bights between two support bodies 1. The upper level of the frame body 1 is provided with a workbench 2 for people to walk, and the outer edge of the workbench 2 is provided with a protective fence 11. Stair mouth 21 has still been seted up on workstation 2, and stair mouth 21 on two workstations 2 staggers along the horizontal direction, is provided with the stair 10 that is convenient for the people to move towards another workstation 2 from workstation 2 between two workstations 2.

Referring to fig. 2, the staircase 10 includes a base 5 and a plurality of step assemblies, the base 5 is disposed obliquely downward, two ends of the base 5 are fixedly connected to edges of the staircase openings 21 of the two work benches 2, and the step assemblies are sequentially disposed on the upper end surface of the base 5 at intervals along the length direction of the base 5. The base 5 is connected upper and lower two workstations 2 and is played stabilizing effect, strengthens the holistic structural strength of support body 1, and the people walks stair 10 through trampling the step subassembly.

Referring to fig. 2 and 3, the step assembly includes a pedal 3 and a support plate 4, one end of the pedal 3 is rotatably connected to the upper end surface of the base 5, the end of the pedal 3 away from the base 5 is rotatably connected to the top of the support plate 4, and the bottom of the support plate 4 is inserted into the upper end surface of the base 5. At this moment, the pedal 3 is horizontally arranged for a person to tread, the support plate 4 is vertically arranged for the pedal 3 to provide support, and the pedal 3 is in a stable state with the support plate 4 after being stressed vertically downwards, so that the person can walk on the stair 10 by stepping on the pedal 3. After the supporting plate 4 is pulled out of the base 5, the pedal 3 and the supporting plate 4 are in a movable state, the pedal 3 rotates downwards, the bottom of the supporting plate 4 rotates upwards to enable the pedal 3 and the supporting plate 4 to be paved and parallel to the upper end face of the base 5, the top end face of the pedal 3 is flush with the top end face of the supporting plate 4, and goods can slide down or roll down on the upper end faces of the pedal 3 and the supporting plate 4.

Referring to fig. 3 and 4, when the support plate 4 and the pedal 3 are laid on the upper end surface of the base 5 and are parallel to the upper end surface of the base 5, a gap is formed between the support plate 4 and the pedal 3 on the adjacent step assembly located below, and the support plate 4 is not laid on the pedal 3 of the next step assembly after being laid flat. The up end of base 5 is provided with between two adjacent step subassemblies and steps on groove 57, and the tank bottom of stepping on groove 57 is the level setting to the up end when stepping on groove 57 tank bottom and the adjacent pedal 3 level that is located the below flush, the setting of stepping on groove 57 makes the people be difficult for stepping on empty and falling down when walking stair 10. When the support plate 4 is laid flat on the base 5 and is horizontal to the upper end surface of the base 5, the opening of the stepping groove 57 is covered by the support plate 4, so that the stepping groove 57 does not affect the transportation when the goods are transported.

Referring to fig. 3 and 4, a control device is arranged on the base 5, and the control device includes a driving member 101, a moving member, a leveling component, a butting block 7 arranged on the moving member, and a reset rod 9. The driving piece 101 drives the moving piece to continuously move upwards, the moving piece sequentially drives the abutting block 7 to separate the supporting plate 4 from the base 5, then the supporting plate 4 of the leveling component and the pedal 3 are driven to be paved on the base 5, and finally the reset rod 9 is driven to control the supporting plate 4 and the pedal 3 to reset to a state where people can tread.

Referring to fig. 3 and 4, the movable chamber 52 is opened inside the base 5, the moving member is the butt plate 6 parallel to the base 5, the butt plate 6 slides along the vertical direction and is positioned in the movable chamber 52, the driving member 101 is an electric push rod 81 or a cylinder, the driving member 101 is vertically and fixedly installed on the bottom wall of the movable chamber 52, the output end of the driving member 101 is fixedly connected with the bottom of the butt plate 6, and the driving member 101 drives the butt plate 6 to vertically move. The butt joint block 7 is provided with a plurality of and follows length direction fixed connection on the up end of butt joint board 6, set up a plurality of inserting groove 51 with butt joint block 7 one-to-one along length direction on the up end of base 5, a plurality of inserting groove 51 simultaneously with a plurality of backup pad 4 one-to-one, inserting groove 51 and activity cavity 52 intercommunication, butt joint block 7 is pegged graft and is cooperated in corresponding inserting groove 51, the bottom of backup pad 4 enter into correspond inserting groove 51 in and with butt joint block 7's top butt. The butt joint board 6 moves upwards to make the butt joint block 7 ejecting the support plate 4 from the inserting groove 51, the top of the butt joint block 7 is an inclined end which is obliquely arranged, and the inclined end at the top is flush with the upper end face of the base 5 when the top of the butt joint block 7 is positioned at the opening of the upper end of the inserting groove 51, so that the bottom of the support plate 4 slides downwards along the upper end face of the base 5.

Referring to fig. 3 and 4, in order to prevent the abutment block 7 from moving above the base 5 during the continuous upward movement of the abutment plate 6 to affect the flattening of the pedal 3 and the support plate 4, the abutment block 7 includes a connecting portion 71 and a working portion 72. The working part 72 is inserted into the insertion groove 51, the connecting part 71 is fixedly connected to the bottom of the working part 72 and is located in the movable chamber 52, and the connecting part 71 can abut against the inner wall of the movable chamber 52 at the opening of the insertion groove 51 and cannot enter the insertion groove 51. The upper end face of the abutting plate 6 is provided with a plurality of connecting grooves 61 corresponding to the connecting portions 71 one by one along the length direction, the connecting portions 71 are matched in the connecting grooves 61 in an inserting mode, and the outer side walls of the connecting portions 71 are in extrusion contact with the inner side walls corresponding to the connecting grooves 61. In an initial state, a gap is formed between the bottom of the connecting portion 71 and the bottom of the connecting groove 61, because the friction force between the connecting portion 71 and the inner wall of the connecting groove 61 is large, the abutting plate 6 and the connecting portion 71 move synchronously, after the working portion 72 moves upwards to abut the top of the connecting portion 71 and the top wall of the movable chamber 52, the inclined end face at the top of the working portion 72 is just flush with the upper end face of the base 5, at the moment, the working portion 72 stops moving upwards, and the abutting plate 6 overcomes the friction force to continue moving upwards.

Referring to fig. 3 and 4, when the abutting plate 6 continues to move upward, the distance between the bottom of the connecting portion 71 and the bottom of the connecting groove 61 is reduced, and the connecting portion is hard to restore. In order to enable the connecting portion 71 and the butt plate 6 to be reset before the butt plate 6 moves upward next time, the two side walls of the working portion 72 facing each other are fixedly connected with limiting blocks 721, the two side inner walls of the inserting groove 51 facing each other are vertically provided with limiting grooves 56, and the limiting blocks 721 are slidably arranged in the limiting grooves 56. After the abutting plate 6 and the working portion 72 synchronously move downwards for a certain distance, the limiting block 721 and the side wall of the limiting groove 56 at the bottom abut against each other, at this time, the abutting plate 6 moves downwards relative to the working portion 72, and the interval between the bottom of the connecting portion 71 and the bottom of the connecting groove 61 is restored. When the stopper 721 abuts against the side wall of the top of the stopper groove 56, the inclined end surface of the working portion 72 is flush with the upper end surface of the base 5.

Referring to fig. 3 and 4, the push-flat assembly is provided with a plurality of groups and corresponds to the support plates 4 one by one, and includes a push rod 81 and a driving rod 82. The up end level of base 5 is equipped with a plurality of push grooves 53 that arrange along length direction, push grooves 53 and push rod 81 one-to-one, push grooves 53 opening orientation lie in the adjacent backup pad 4 bottom in below after backup pad 4 is jacked up by butt piece 7, push rod 81 grafting cooperation then in push grooves 53. The plurality of driving rods 82 are vertically and fixedly connected to the upper end of the abutting plate 6 along the length direction, a plurality of driving grooves 54 corresponding to the driving rods 82 one by one are formed in the upper end face of the base 5, the driving grooves 54 are communicated with the movable cavity 52, and the driving rods 82 are matched in the driving grooves 54 in an inserting mode. The driving groove 54 is communicated with the pushing groove 53, one end of the push rod 81 enters the driving groove 54, the upper end and the lower end of the end part of the push rod 81 entering the driving groove 54 are respectively provided with an inclined end, the top of the driving rod 82 faces the side wall of the push rod 81 and is integrally formed with a top block 821, the driving rod 82 is in plug-in fit with the driving groove 54 through the top block 821, and the upper end and the lower end of the top block 821 are also provided with inclined ends.

Referring to fig. 3 and 4, when the top of the working portion 72 is flush with the upper end surface of the base 5, the top block 821 moves upward until the inclined end of the upper end abuts against the inclined end of the lower end of the push rod 81, the top block 821 continues to move upward, at this time, the top block 821 drives the push rod 81 to move toward the outside of the base 5 through the inclined end of the top block 821, if the support plate 4 is not laid, the push rod 81 abuts against the support plate 4 which is not laid after being jacked up, and the push rod 81 drives the bottom of the support plate 4 to move downward, so that the support plate 4 and the pedal 3 are laid. When the abutting plate 6 is reset, the top block 821 abuts against the inclined end of the upper end of the push rod 81 through the inclined end of the lower end, and the top block 821 pushes the push rod 81 open and moves to the lower side of the push rod 81.

Referring to fig. 4 and 5, in order to retract the plunger 81 into the base 5, a spring slot 58 is formed in a side wall of a bottom of the push slot 53 along a moving direction of the plunger 81, a spring plate 822 slidably disposed in the spring slot 58 is fixedly connected to the side wall of the bottom of the plunger 81, an extrusion spring 811 is disposed between the spring plate 822 and a side wall of the spring slot 58 adjacent to an outer side of the base 5, and the extrusion spring 811 generates an elastic force so that one end of the plunger 81 is located in the base 5 and the other end is located in the driving slot 54. The top block 821 overcomes the elastic force of the pressing spring 811 and moves upward, so that the push rod 81 moves toward the support plate 4, when the top block 821 moves above the push rod 81, a gap for the push rod 81 to reset is formed between the push rod 81 and the driving rod 82, and the pressing spring 811 resets to make the push rod 81 return to the push groove 53 again

Referring to fig. 3 and 4, the reset rods 9 are provided with a plurality of reset grooves 55 which are vertically and fixedly connected to the upper end of the abutting plate 6, the upper end surface of the base 5 is provided with a plurality of reset grooves 55 which are in one-to-one correspondence with the pedals 3, the reset grooves 55 are communicated with the movable cavity 52 and are arranged at intervals along the length direction of the base 5, and the reset rods 9 are inserted into the corresponding reset grooves 55. When the top block 821 moves to the position above the corresponding push rod 81, and the support plate 4 and the pedal 3 are laid on the base 5, the abutting plate 6 drives the reset rod 9 to move upwards continuously, the top of the reset rod 9 penetrates through the reset groove 55 and abuts against the position, close to the upper side of the base 5, of the bottom of the corresponding pedal 3, the reset rod 9 jacks up the pedal 3 and rotates upwards in an inclined mode, when the bottom of the support plate 4 moves to the opening at the upper end of the corresponding insertion groove 51 again, the abutting plate 6 stops and moves downwards again, the working part 72 moves downwards, the bottom of the support plate 4 enters the insertion groove 51 again and abuts against the top of the working part 72, so that the step assembly resets, and the abutting plate 6 moves downwards continuously to the initial position and stops.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.