CN207960460U

CN207960460U - Platform ladder

Info

Publication number: CN207960460U
Application number: CN201820324492.3U
Authority: CN
Inventors: 练展鹏
Original assignee: Powerise International Hardware Group Co Ltd
Current assignee: Yangjiang Tengda Safety Technology Co.,Ltd.
Priority date: 2018-03-09
Filing date: 2018-03-09
Publication date: 2018-10-12
Anticipated expiration: 2028-03-09
Also published as: WO2019170141A1

Abstract

The utility model is related to a kind of platform ladders, including the first cat ladder, the second cat ladder and the platform being connected between the first cat ladder and the second cat ladder, one end of second cat ladder is rotatablely connected with the first cat ladder, further include handrail, safety net and fence, the handrail is arranged on first cat ladder, the safety net is arranged between the top and platform of the handrail, and the fence, which encloses, sets the safety net.Platform ladder is equipped with handrail, safety net and fence, and user can grasp handrail when climbing platform ladder, to the power of one rising of body, make user that can easily climb platform ladder；Safety net is set at the top of platform ladder to around between platform, can prevent tool from falling；Fence is set outside safety net, fixed function is played to safety net, and can prevent user from falling.

Description

Platform ladder

Technical field

The utility model is related to ladder fields, more particularly to a kind of platform ladder.

Background technology

In use, tool used by a user may be fallen from ladder or user for current ladder It may fall from ladder, there are security risks.

Utility model content

Based on this, the ladder that a kind of preventing tool fell and increased user's safety in utilization is provided.

A kind of platform ladder, including the first cat ladder, the second cat ladder and the platform being connected between the first cat ladder and the second cat ladder, One end of second cat ladder is rotatablely connected with the first cat ladder, further includes handrail, safety net and fence, and the handrail is arranged in institute It states on the first cat ladder, the safety net is arranged between the top and platform of the handrail, and the fence, which encloses, sets the safety net.

The fence is arranged at the end of second cat ladder being rotatablely connected with the first cat ladder in one of the embodiments, Portion.

The vertical bar that the handrail includes mandril and connect with mandril in one of the embodiments, the vertical bar are set It sets on two side levers of the first cat ladder, with the top of the first cat ladder in sustained height, the mandril is same at the top of the vertical bar When connect the top of vertical bar and the first cat ladder, the mandril hangs safety net.

The dismountable railing of setting in one of the embodiments, between described two vertical bars at the top of vertical bar.

One end of the railing is hinged with a vertical bar by rotary limited in one of the embodiments, the column The other end of bar is detachably connected with another vertical bar by lock, and the rotary limited is cut with scissors so that railing can only be to far from platform ladder Top direction rotation.

In one of the embodiments, rotary limited hinge include the first limiting section, the second limiting section, limit rotary shaft, Mutually matched limiting groove and limit protrusion, first limiting section are located on vertical bar, and the second limiting section is located on railing, Limit rotary shaft is located on the first limiting section, and the second limiting section is equipped with the axis hole coordinated with limit rotary shaft, the limiting groove One end at the top of the separate platform ladder of the first limiting section, the limit protrusion are located at the separate platform ladder top of the second limiting section The one end in portion.

The lock includes mutually matched first sticking department and second being located on vertical bar in one of the embodiments, Sticking department, first sticking department are hatch frame and are open backwards to the top of platform ladder that second sticking department is equipped with groove, And notch is backwards to vertical bar.

The platform includes pedal, skirting board in one of the embodiments, and the pedal includes first side, second Side, third side and the 4th side, the first side are located between two side levers of the first cat ladder, and the third side is located at Between two side levers of the second cat ladder, the second side and the 4th side are respectively positioned between the first cat ladder and the second cat ladder, described Skirting board encloses the second side for setting pedal, third side and the 4th side, the second side, the 4th side close to the first side Two side levers of the end in face and the first cat ladder are rotatablely connected, one end of the close third side of the pedal by the second cat ladder foot Plate support is pedaled, the third side and at least partly second side, the 4th side fix the bottom end of safety net.

The platform further includes the support leg being fixed on platform lower surface, the support in one of the embodiments, Foot is between platform and the step tread plate of the second cat ladder.

Bloster hinge is set between the second side and/or the 4th side and the second cat ladder in one of the embodiments, Chain.

Described supporting hinges one end is rotatably connected on the second cat ladder in one of the embodiments, and the other end passes through phase The profiled holes and lock mutually coordinated are connected on second side and/or the 4th side, and the lock is located in profiled holes.

It is arranged between the side lever and the corresponding position of platform of second cat ladder in one of the embodiments, and prevents sticking up dress It sets.

Setting turns between the second side, the 4th side and two side levers of the first cat ladder in one of the embodiments, Dynamic device, the tumbler includes mutually matched fixing axle and connection sheet, and the fixing axle is fixed on the two of the first cat ladder On side lever, the connection sheet is fixed in second side and the 4th side, and the connection sheet is rotatablely connected with the fixing axle, institute State it is anti-to stick up device include mutually matched pedal lock and anti-wraping plate, the pedal lock is located on platform, and the anti-wraping plate is positioned at the On the side lever of two cat ladders, and platform ladder is in the open state, and the anti-wraping plate keeps out the pedal lock for stopping that platform is sent out Raw rotation when needing folding platform ladder, pulls platform towards the direction far from the first cat ladder, connection sheet is made to be rotated relative to fixing axle, Pedal lock is moved relative to anti-wraping plate until being detached from anti-wraping plate.

The bottom end setting of the side lever of first cat ladder and/or the second cat ladder has anti-skidding in one of the embodiments, Cheat the foot glue of line.

Castor is arranged in the top of the foot glue of second cat ladder in one of the embodiments,.

Above-mentioned platform ladder is equipped with handrail, safety net and fence, and user can grasp handrail when climbing platform ladder, give body The power of one rising of body, makes user that can easily climb platform ladder；Safety net is set at the top of platform ladder to around between platform, can be prevented Only tool is fallen；Fence is set outside safety net, fixed function is played to safety net, and can prevent user from falling.

Description of the drawings

Fig. 1 is the 3 D stereo schematic diagram of platform ladder；

Fig. 2 is the right view of platform ladder shown in Fig. 1；

Fig. 3 is the left view that platform ladder is in folded state shown in Fig. 1, and wherein safety net is removed；

Fig. 4 is the partial structural diagram that platform ladder removes safety net and the 4th side lever of part shown in Fig. 1；

Fig. 5 is the portions B structure enlargement diagram in Fig. 4；

Fig. 6 is another visual angle schematic diagrames of Fig. 4；

Fig. 7 is the portions C structure enlargement diagram in Fig. 6；

Fig. 8 is the left view of platform ladder shown in Fig. 1, and wherein safety net is removed；

Fig. 9 is the portions A structure enlargement diagram in Fig. 8；

Figure 10 is the enlarged diagram of Fig. 1 intermediate hurdles lever locks；

Figure 11 is the explosive view that rotary limited is cut with scissors in Fig. 1；

Figure 12 is another visual angle schematic diagram of Figure 11；

Figure 13 is another visual angle schematic diagram of Figure 11.

Specific implementation mode

The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model, It states.The better embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms It realizes, however it is not limited to embodiments described herein.On the contrary, the purpose of providing these embodiments is that making new to this practicality The disclosure of type understands more thorough and comprehensive.

It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ", " right side " and similar statement for illustrative purposes only, are not offered as being unique embodiment.

Unless otherwise defined, all of technologies and scientific terms used here by the article is led with the technology for belonging to the utility model The normally understood meaning of technical staff in domain is identical.Terminology used in the description of the utility model herein only be The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein packet Include any and all combinations of one or more relevant Listed Items.

As shown in Figure 1, a kind of platform ladder, including the first cat ladder 100, the second cat ladder 200 and be connected to the first cat ladder 100, Platform 300 between second cat ladder 200.

As shown in Figure 1, the first cat ladder 100 and the second cat ladder 200 is of same size, and the length of the first cat ladder 100 is more than Second cat ladder 200, the first cat ladder 100 and the second cat ladder 200 form the type of falling y structure.First cat ladder 100 and the second cat ladder 200 bottom flushes, and is rotatablely connected at the top of the second cat ladder 200 and the position away from top certain distance of the first cat ladder 100, So that two cat ladders can be opened and be folded.Under opening state, user can the operation on platform ladder, under folded state, platform ladder occupies Space is small, is easily placed.The platform 300 is located at the middle and upper part of platform ladder, and is less than at the rotation connection of two cat ladders, platform 300 one end are rotatablely connected with the first cat ladder 100, and the other end is arranged on the step tread plate of the second cat ladder 200.Platform ladder opening state Under, platform 300 is horizontal positioned, and user can stand the operation on platform, and when platform ladder folds, platform 300 is relative to the first cat ladder 100 rotate up to plumbness.Provide that the direction of the first cat ladder 100 is the front of platform ladder, the direction of the second cat ladder 200 is flat The back side of platform ladder, user pass through the upper and lower platform ladder in front the first cat ladder 100 of climbing of platform ladder.

First cat ladder 100 includes the first side lever 121, the second side lever 122 and the first step tread plate 123.First side lever 121 Parallel with the second side lever 122, the first step tread plate 123 is horizontally placed between the first side lever 121 and the second side lever 122, and quantity can Think it is multiple, and the first step tread plate 123 be less than platform 300；Second cat ladder 200 includes third side lever 221, the 4th side lever 222 and second step tread plate 223, the third side lever 221 is parallel with the 4th side lever 222, and second step tread plate 223 is horizontally disposed Between third side lever 221 and the 4th side lever 222, quantity can be multiple, and the second step tread plate 223 support of extreme higher position is flat The back side of platform 300.Under normal circumstances, user can climb platform ladder from front, and the utilization rate of second step tread plate 223 at the back side is less than First step tread plate 123, so to avoid the wasting of resources, saving processing cost, the quantity of the second step tread plate 223 is less than the first pedal The quantity of plate 123, the i.e. distance being spaced between the first step tread plate 123 are less than the distance being spaced between the second step tread plate 223.

As described in Figure 1, in one embodiment, first cat ladder 100 is equipped with handrail 110, and handrail 110 includes mandril 111 and the vertical bar 112 that is connect with mandril 111.The vertical bar 112 is located on the first side lever 121 and the second side lever 122, and It is horizontal that vertical bar 112, which has certain curvature, top curved, is existed with the top of the first side lever 121 and the second side lever 122 Sustained height with the first side lever 121 and the second side lever 122 close to vertical after the bottom bend of vertical bar 112, and is fixed on side On bar.The mandril 111 is U-shaped, is open towards the front of platform ladder, is fixed on the top of the first side lever 121 and the second side lever 122 Portion, and with the top of vertical bar 112 in sustained height, two ends of the opening of mandril 111 water with two vertical bars 112 respectively Flat top portion connects.

As shown in Figure 1, be arranged prevents the safety net 400 that tool is fallen, the peace in one embodiment, on the platform ladder The fence 210 of safety net 400 is fixed in the external setting of the whole network.The top of the safety net 400 is fixed on mandril 111, safety Net 400 can cover all or part of position of mandril 111.The bottom of safety net 400 is fixed on platform 300, safety net 400 Its excess-three side other than positive side for setting platform 300 can be enclosed.The top of the third side lever 221 and the second side lever 122 rotation connections, the top of the 4th side lever 222 are rotatablely connected with the first side lever 121, and the U-shaped of setting level encloses at two tie points Lifting-hook 116 is arranged, as shown in figure 4, mandril 111 is hooked at the both ends of lifting-hook 116 respectively in column 210 between fence 210 and mandril 111 With fence 210, prevent fence 210 from rotating.As shown in Figure 1, the fence 210 is located at outside safety net 400, with lifting-hook 116 1 Fixed safety net 400 is played, also increases the safety of staff on platform simultaneously.

As shown in Figure 1 to Figure 3, in one embodiment, the platform 300 includes pedal 310, skirting board 320 and support leg 330.The pedal 310 is with certain thickness level board, including first side 311, second side 312, third side 313, the 4th side 314.Anti-skidding hole line is set on the upper surface of the pedal 310, can prevent user from slipping and preventing tool It rolls.The first side 311 is located between two side levers of the first cat ladder 100, is located at the front of platform ladder；The third side 313 are located between two side levers of the second cat ladder 200, are located at the back side of platform ladder；The second side 312 and the 4th side 314 It is respectively positioned between the first cat ladder 100 and the second cat ladder 200, is located at the two sides of platform ladder.The skirting board 320, which encloses, sets pedal 310 second side 312, third side 313 and the 4th side 314, prevents tool from tumbling platform 300.At first side 311 not Skirting board 320 is set, and the convenient staff climbed from platform ladder front sets foot on platform 300.As shown in Figure 2 and Figure 5, support leg 330 are located at the lower surface at close the platform ladder back side of the pedal 310, the lower surface of support leg 330 and position highest the The upper surface of two step tread plates 223 contacts, and the second step tread plate 223 provides support to support leg 330.

As shown in Figure 1 to Figure 3, in one embodiment, the platform 300 is rotatably connected on the first, second side lever 121,122 On, and be arranged between the second cat ladder 200 and prevent sticking up device.The positive end of close platform ladder of second side 312 passes through solid Dead axle 317 and connection sheet 318 are rotatably connected on the second side lever 122, the positive end of close platform ladder of the 4th side 314 It is rotatably connected on the first side lever 121 by fixing axle 317 and connection sheet 318.Fixing axle 317 is fixed on the first, second side lever 121, on 122, connection sheet 318 is fixed in second side 312 and the 4th side 314, and connection sheet 318 can be 317 turns around fixing axle It is dynamic so that platform 300 can be rotated around fixing axle 317 relative to the first cat ladder 100 together with connection sheet 318, be climbed with reaching first When ladder 100 and the second cat ladder 200 fold, platform 300 can rotate up to platform 300 around rotation axis 317 together with connection sheet 318 and arrive Up to the purpose of vertical state.It is connected by connection sheet 318 between platform 300 and rotation axis 317 so that platform 300 just starts to turn Dynamic moment does not move not instead of straight up, there is the space being translatable a little, prevents sticking up device to unlock.It is described to prevent sticking up device Between the side lever and the corresponding position of platform 300 of the second cat ladder 200, Fig. 4 show removal safety net 400 and part the 4th The structural schematic diagram of side lever 222, Fig. 5 show the portions B structure enlargement diagram in Fig. 4, and Fig. 6 is another visual angle schematic diagram of Fig. 4, Fig. 7 is the portions C structure enlargement diagram in Fig. 6.As shown in Figures 4 to 7, prevent that it includes mutually matched 211 He of anti-wraping plate to stick up device Pedal lock 316.The anti-wraping plate 211 is located on the side lever of the second cat ladder 200, including anti-wraping plate 2111, anti-sticks up shaft 2113, bullet Bow 2112.The anti-shaft 2113 of sticking up wears anti-wraping plate 2111, and the intermediate position of catapult 2112, which is wrapped in, prevents sticking up in shaft 2113, And catapult 2112 supports anti-wraping plate 2111, can make the rebound playback of anti-wraping plate 2111.The pedal lock 316 be located at platform 300 with At the corresponding position of side lever of second cat ladder 200, bottom is hook-type, is coordinated with anti-wraping plate 2111, and the compacting of anti-wraping plate 2111 is stepped on Plate lock 316 prevents its tilting.

When need to fold platform ladder, platform 300 need to be pulled towards the direction far from the first cat ladder 100, keep connection sheet 318 opposite It is rotated in fixing axle 317, pedal lock 316 is moved horizontally relative to anti-wraping plate 211 until anti-wraping plate 211 is detached from, by the second cat ladder 200 is rotating closed relative to the first cat ladder 100, and platform 300 continues around the rotation of fixing axle 317, until the first cat ladder 100 and the Two cat ladders 200 are closed, and platform 300 is vertical, completes the folding of platform ladder.It is when need to open platform ladder, the second cat ladder 200 is opposite In the rotation of the first cat ladder 100 until defined angle, rotating platform 300 during being somebody's turn to do, are allowed to connection sheet 318 together around fixation Axis 317 rotates, until pedal lock 316 is contacted with anti-wraping plate 2111, firmly presses flattening bench 300, elastic rotation occurs for anti-wraping plate 2111 Turn, pedal lock 316 is pressed into 2111 lower part of anti-wraping plate, rear defence wraping plate 2111 sprung back and playback by catapult 2112, positioned at stepping on Plate locks 316 tops, and compacting pedal lock 316 prevents platform 300 from tilting.

As shown in Fig. 1, Fig. 8 and Fig. 9, in one embodiment, second side 312 and/or the 4th side 314 and the second cat ladder Supporting hinges 315 are respectively provided between 200.315 one end of the supporting hinges is rotatably connected on highest second step tread plate 223, The other end is connected to by mutually matched profiled holes 3151 and lock 3152 on second side 312 and/or the 4th side 314, The lock 3152 is located in profiled holes 3151.The profiled holes 3151 are L-type, the length of the long side and supporting hinges 315 of the L Degree direction is parallel, and the short side of L is vertical with the length direction of supporting hinges 315.Under platform ladder working condition, supporting hinges 315 By thrust, lock 3152 is located at the short side of the L-type of profiled holes 3151, irremovable, can fixed platform 300 at both ends.When When needing to fold platform ladder, the long edge position for the L-type that supporting hinges 315 make lock 3152 be located at profiled holes 3151 is pushed away, is latched 3152 can move in the long side of the L-type of profiled holes 3151, with the folding of the first cat ladder 100 and the second cat ladder 200, crus secunda It pedals plate 223 to move towards the first cat ladder 100, platform 300 turns to vertical state (as shown in Figure 3), crus secunda around fixing axle 317 It pedals plate 223 and is located at 3151 lower section of profiled holes.

As shown in Fig. 1 and Figure 10 to Figure 13, in one embodiment, between the two vertical bar 112 at the top of platform ladder Dismountable railing 113 is arranged in place, prevents staff from falling from platform 300.One end of the railing 113 and a vertical bar 112 are detachably connected with another vertical bar 112 by lock 115 by 114 connection of rotary limited hinge, the other end of the railing 113 It connects.Figure 11 to Figure 13 be Fig. 1 in rotary limited hinge 114 explosive view, rotary limited hinge 114 include the first limiting section 1141, Second limiting section 1142, limit rotary shaft 1143, mutually matched limiting groove 1144 and limit protrusion 1145, first limit Portion 1141 is located on vertical bar 112, and the second limiting section 1142 is located on railing 113, and limit rotary shaft 1143 is located at the first limiting section On 1141, and the second limiting section 1142 is equipped with the axis hole that coordinate with limit rotary shaft 1143, and the limiting groove 1144 is positioned at the One end at the top of the separate platform ladder of one limiting section 1141, the limit protrusion 1145 are located at the separate flat of the second limiting section 1142 The one end in platform ladder top portion.In another embodiment, the limit protrusion 1145 is located at the close platform ladder of the first limiting section 1141 The one end at top, the limiting groove 1144 are located at one end at the top of the close platform ladder of the second limiting section 1142.Either where Kind mode, rotary limited hinge 114 is so that the other end of railing 113 can only be rotated to the direction at the top far from platform ladder.Column Bar 113 is rotated down around rotary limited hinge 114 on vertical plane, and when going to not between two vertical bars 112, user can be upper and lower Platform 300.As shown in Figure 10, the lock 115 includes the first sticking department 1151 and the second sticking department 1152, the first sticking department 1151 It is opening down so that railing 113 can only move downward, and second sticking department 1152 is equipped with groove, and notch is backwards to vertical bar 112, the lower surface of groove non-floating rail 113 prevents railing 113 from moving down.Second sticking department 1152 can be relative to perpendicular Shape bar 112 moves, and when need to open railing 113, only need to move the second sticking department 1152, the groove of the second sticking department 1152 is made to leave The lower surface of railing 113, railing 113 can cut with scissors 114 around rotary limited and rotate down.

As shown in Figure 1, in one embodiment, the bottom end of the side lever of first cat ladder, 100 and/or second cat ladder 200 is set The foot glue 231 with anti-skidding hole line is set, can prevent the bottom surface of platform ladder from generating sliding with ground, when raising platform ladder is horizontal positioned Stability.In another embodiment, castor 230 is arranged in 231 top of foot glue of second cat ladder 200, needs mobile platform terraced When, it is only necessary to so that platform ladder is tilted so that castor 230 lands, and can pull platform ladder, time saving and energy saving.

Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, it is all considered to be the range of this specification record.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But therefore it can not be interpreted as the limitation to utility model patent range.It should be pointed out that for the common skill of this field For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.

Claims

1. a kind of platform ladder, including the first cat ladder (100), the second cat ladder (200) and it is connected to the first cat ladder (100) and second and climbs Platform (300) between terraced (200), one end and the first cat ladder (100) of second cat ladder (200) are rotatablely connected, feature It is, further includes handrail (110), safety net (400) and fence (210), the handrail (110) is arranged in first cat ladder (100) on, the safety net (400) is arranged between the top of the handrail (110) and platform (300), the fence (210) It encloses and sets the safety net (400).

2. platform ladder as described in claim 1, it is characterised in that：The fence (210) is arranged in second cat ladder (200) With the first cat ladder (100) rotation connection end.

3. platform ladder as described in claim 1, it is characterised in that：The handrail (110) includes mandril (111) and and mandril (111) the vertical bar (112) connected, the vertical bar (112) is arranged on two side levers of the first cat ladder (100), described vertical The top of bar (112) and the top of the first cat ladder (100) mandril (111) while connecting vertical bar (112) in sustained height With the top of the first cat ladder (100), the mandril (111) hangs safety net (400).

4. platform ladder as claimed in claim 3, it is characterised in that：Close to vertical bar (112) between the two vertical bar (112) Dismountable railing (113) is set at top.

5. platform ladder as claimed in claim 4, it is characterised in that：One end of the railing (113) is logical with a vertical bar (112) Rotary limited hinge (114) connection is crossed, the other end of the railing (113) is detachable by lock (115) with another vertical bar (112) Connection, the rotary limited hinge (114) is so that railing (113) can only be rotated to the direction at the top far from platform ladder.

6. platform ladder as claimed in claim 5, it is characterised in that：The rotary limited hinge (114) includes the first limiting section (1141), the second limiting section (1142), limit rotary shaft (1143), mutually matched limiting groove (1144) and limit protrusion (1145), first limiting section (1141) is located on vertical bar (112), and the second limiting section (1142) is located on railing (113), Limit rotary shaft (1143) is located on the first limiting section (1141), and the second limiting section (1142) is equipped with and limit rotary shaft (1143) The axis hole of cooperation, the limiting groove (1144) is located at one end at the top of the separate platform ladder of the first limiting section (1141), described Limit protrusion (1145) is located at one end at the top of the separate platform ladder of the second limiting section (1142).

7. platform ladder as claimed in claim 5, it is characterised in that：The lock (115) includes the phase being located on vertical bar (112) The first sticking department (1151) and the second sticking department (1152) mutually coordinated, first sticking department (1151) are hatch frame and open Mouth is backwards to the top of platform ladder, and second sticking department (1152) is equipped with groove, and notch is backwards to vertical bar (112).

8. platform ladder as described in claim 1, it is characterised in that：The platform (300) includes pedal (310), skirting board (320), the pedal (310) includes first side (311), second side (312), third side (313) and the 4th side (314), the first side (311) is located between two side levers of the first cat ladder (100), and the third side (313) is located at the Between two side levers of two cat ladders (200), the second side (312) and the 4th side (314) be respectively positioned on the first cat ladder (100) and Between second cat ladder (200), the skirting board (320) enclose the second side (312) for setting pedal (310), third side (313) and 4th side (314), the second side (312), the 4th side (314) close first side (311) end and first Two side levers of cat ladder (100) are rotatablely connected, and one end of the close third side (313) of the pedal (310) is by the second cat ladder (200) step tread plate support, the third side (313) and at least partly second side (312), the 4th side (314) are solid The bottom end of Dingan County's the whole network (400).

9. platform ladder as claimed in claim 8, it is characterised in that：The platform (300) further includes being fixed under platform (300) Support leg (330) on surface, the support leg (330) are located between platform (300) and the step tread plate of the second cat ladder (200).

10. platform ladder as claimed in claim 8, it is characterised in that：The second side (312) and/or the 4th side (314) Supporting hinges (315) are set between the second cat ladder (200).

11. platform ladder as claimed in claim 10, it is characterised in that：Described supporting hinges (315) one end is rotatably connected on On two cat ladders (200), the other end is connected to second side (312) by mutually matched profiled holes (3151) and lock (3152) And/or the 4th on side (314), the lock (3152) is located in profiled holes (3151).

12. platform ladder as claimed in claim 8, it is characterised in that：The side lever of second cat ladder (200) and platform (300) Corresponding position between be arranged and anti-stick up device.

13. platform ladder as claimed in claim 12, it is characterised in that：The second side (312), the 4th side (314) with Tumbler is set between two side levers of the first cat ladder (100), the tumbler include mutually matched fixing axle (317) and Connection sheet (318), the fixing axle (317) are fixed on two side levers of the first cat ladder (100), and the connection sheet (318) is fixed In second side (312) and the 4th side (314), the connection sheet (318) is rotatablely connected with the fixing axle (317), institute It states and prevents that it includes mutually matched pedal lock (316) and anti-wraping plate (211) to stick up device, the pedal lock (316) is located at platform (300) On, the anti-wraping plate (211) is located on the side lever of the second cat ladder (200), and platform ladder is in the open state, the anti-wraping plate (211) pedal lock (316) is kept out for stopping that platform (300) rotates, and when needing folding platform ladder, is climbed towards far from first The direction of terraced (100) pulls platform (300), and connection sheet (318) is made to be rotated relative to fixing axle (317), and pedal lock (316) is opposite It is mobile until being detached from anti-wraping plate (211) in anti-wraping plate (211).

14. platform ladder as described in claim 1, it is characterised in that：First cat ladder (100) and/or the second cat ladder (200) Side lever bottom end setting have it is anti-skidding hole line foot glue (231).

15. platform ladder as claimed in claim 14, it is characterised in that：The top of the foot glue (231) of second cat ladder (200) Castor (230) is set.