CN211692263U - Movable multifunctional folding ladder - Google Patents

Abstract

The utility model discloses a portable multi-energy folding ladder, including two articulated roofs, establish the ladder frame in two roof bottoms respectively, the ladder frame is including establishing the supporting legs in two parallels of roof bottom, establish a plurality of transverse support pole between two supporting legs, the bottom of each supporting legs all is equipped with an universal wheel, slide on the supporting legs and be equipped with the movable sleeve, the bottom of movable sleeve is equipped with the position sleeve, the universal wheel is located the position sleeve, be equipped with tension mechanism between movable sleeve or/and position sleeve and the supporting legs, be equipped with coupling mechanism between the movable sleeve on the supporting legs of two parallels of same ladder frame, still be equipped with angle positioning mechanism between two adjacent ladder frames, the expansion angle between two ladder frames is died through angle positioning mechanism lock. The problem of present folding ladder can't satisfy operating personnel and sit the work that steadily removes and last on the folding ladder, avoided again to remove the in-process and appear the focus skew and overturn and remove the in-process and can't in time stop and fix a position the problem.

Description

Movable multifunctional folding ladder

Technical Field

The utility model relates to a ladder technical field for the engineering, concretely relates to portable multipotency folding ladder.

Background

The folding ladder is also called as a herringbone ladder, the basic shape of which is formed by two rotatable connecting plates and a ladder frame, the general height of the folding ladder is between 1.5 and 2m, the folding ladder can be basically used when the wall surface is painted, drilled and the like in a building site, and the height of the folding ladder can be increased so as to facilitate the decoration operation of a roof and a higher wall. At present, the ladder is widely used during decoration, however, the fact that in the actual use process, although each construction site pays attention to and pays attention to safety problems, when an operator uses the folding ladder, if the operator does not sit on a connecting plate, the climbing height is not high, the operator can conveniently descend, when the operator basically needs to move an area, the operator can climb down the area firstly and then manually carry the folding ladder to a required position, the safety is generally not problematic, however, when the operator sits on the connecting plate to decorate a higher wall surface, the operator can directly extend the folding ladder as the feet, the two ladder frames can move as the feet for walking instead through the acting force of the two feet, and the falling of the folding ladder easily occurs under the condition that the head of the operator firstly lands, so that most of the operators operating on the folding ladder in the current engineering are injured in the working state In some cases, the condition may occur, which may eventually lead to disability or death. The fundamental reasons for the folding ladder to tip over are the following two aspects: 1. the two ladder frames of the folding ladder have the problem that the center is difficult to control due to the fact that the included angle changes to be too small in the moving process, and therefore side turning accidents are caused; 2. during the movement of the folding ladder, a ladder frame is contacted with the ground, and the center of the ladder frame deviates to the outer side of the ladder frame, so that the folding ladder is overturned.

Therefore, in order to avoid such a safety accident that occurs again later for the operator, and to meet the requirement that the operator can move and continuously work while sitting on the folding ladder, the folding ladder needs to be designed to move stably and flexibly when needed, and to prevent the folding ladder from side turning due to gravity center shift.

SUMMERY OF THE UTILITY MODEL

In order to solve certain or some technical problem that exists among the prior art, the utility model provides a portable multipotency folding ladder has both solved present folding ladder and can't satisfy the problem that operating personnel sits the work of carrying out steady movement and continuation on the folding ladder, has avoided again to remove the in-process and has appeared the focus skew and overturn and remove the problem that the in-process can't in time stop and fix a position.

For solving the above-mentioned prior art problem, the utility model discloses a following scheme:

a movable multifunctional folding ladder comprises two hinged top plates and ladder frames respectively arranged at the bottoms of the two top plates, wherein each ladder frame comprises two parallel supporting legs arranged at the bottom of the top plate and a plurality of transverse supporting rods arranged between the two supporting legs, the bottom of each supporting leg is provided with a universal wheel, a movable sleeve is arranged on each supporting leg in a sliding manner, the bottom of each movable sleeve is provided with a positioning sleeve, the universal wheels are positioned in the positioning sleeves, a tension mechanism is arranged between each movable sleeve or/and the corresponding positioning sleeve and the corresponding supporting leg, the ladder frames are fixed after the universal wheels and the positioning sleeves are simultaneously contacted with the ground through the tension, the positioning sleeves generate downward extrusion locking force on the ground through the positioning mechanisms, and the universal wheels slide upwards along the supporting legs to be separated from the ground through the movable sleeves and the positioning sleeves to realize movement, the upwards sliding movable sleeve and the positioning sleeve pass through the automatic resetting of the tension mechanism, the same is adopted by the two parallel ladder frames, a connecting mechanism is arranged between the movable sleeves on the supporting legs, the same is adopted by the movable sleeves on the ladder frames and the positioning sleeve, the connecting mechanism realizes synchronous upwards sliding, the adjacent two angle positioning mechanisms are further arranged between the ladder frames, and the unfolding angle between the ladder frames passes through the locking of the angle positioning mechanisms.

Furthermore, the cross section of the supporting leg is of a square structure, two sliding grooves are symmetrically formed in the supporting leg, the cross section of the movable sleeve is of a U-shaped structure, a sliding block is arranged in the movable sleeve, and the movable sleeve is arranged in the sliding grooves in a sliding mode through the sliding block.

Furthermore, the locating sleeve is of a horn-shaped structure or a conical structure with a quadrangular cross section, and the top end of the locating sleeve is connected with the bottom of the movable sleeve.

Furthermore, the bottom of the positioning sleeve is provided with 3-6 contact surfaces in a planar structure, the included angle between every two adjacent contact surfaces is 140-160 degrees, and the ladder frames unfolded to different angles are in contact with the ground through the corresponding contact surfaces.

Furthermore, the tension mechanism is composed of a horn-shaped tension spring, and two ends of the tension spring are respectively arranged at the bottom of the supporting leg and the inner side of the positioning sleeve.

Furthermore, the connecting mechanism comprises a first driving rod arranged between the two movable sleeves and a second driving rod arranged at the tops of the two movable sleeves, the first driving rod is positioned between the two adjacent transverse supporting rods, the height of the first driving rod is 60-120cm, and the first driving rod is 3-7cm lower than the nearest transverse supporting rod.

Further, the second actuating lever includes that two one end switching are in telescopic link on the movable sleeve, establish the pull rod between two telescopic links, the telescopic link is located the inboard of horizontal bracing piece, two on the ladder frame the second actuating lever accessible corresponds the telescopic link carries out the regulation of height and the rotation of distance each other, the second actuating lever passes through hand or foot upwards stimulate realize upwards sliding behind the pull rod, the position sleeve is stepped on through the foot on the second actuating lever realize behind the pull rod that the secondary is locked with ground and is fixed.

Further, the adjusting distance between the pull rod and the top plate is 30-60 cm.

Further, angle positioning mechanism is including establishing respectively two regulation seat and regulating block on the ladder frame, the regulating block is flaky arc structure, the regulating block inserts in the regulation seat and along the opening and shutting of ladder frame is flexible, the telescopic state the regulating block passes through the regulation seat is locked and is fixed.

Furthermore, one end of the adjusting block is connected to the supporting leg in a rotating mode through a rotating shaft, the adjusting block and the supporting leg are both provided with a magnet, and the adjusting block which is not inserted into the adjusting seat can be fixed to one side of the supporting leg through the adsorption force of the magnet.

Furthermore, the magnets on the supporting legs are positioned at the lower end of the rotating shaft.

Further, adjust the seat including the rectangle mount pad that has the locating hole, establish locking on the mount pad is detained, locking is detained including establishing the rotatory spline in the mount pad outside, establishing the inboard latch segment of mount pad, establishing rotatory spline with adjusting screw between the latch segment, the upper and lower both ends of latch segment are slided and are established on the inside wall of mount pad, the latch segment passes through translation around the rotation of rotatory spline carries out.

Furthermore, the outer side surface of the adjusting block is of a concave-convex tooth-shaped structure, the tooth shape is of a triangular or conical structure, and the shape of the locking block is matched with the tooth shape.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the two ladder frames of the folding ladder can be locked through the angle positioning mechanism after being unfolded, so that the folding ladder is always in an isosceles triangle state when in use, the center of gravity is centered, and the condition that the included angle is reduced due to external force is avoided, thereby effectively avoiding an operator from directly walking as the feet of the operator extend;

2. the universal wheels are arranged at the bottoms of the supporting legs, so that an operator can sit on the folding ladder to move, and the folding ladder can move in an isosceles triangle state, the safety and the stability are better, the side turning is more difficult, the movement flexibility is high, and due to the characteristics of the universal wheels, when the operator brushes the side wall, the upper body can use the wall as a supporting stable stress point, so that the safety of the folding ladder is ensured, even if the folding ladder is turned over carelessly, the regions of the hands and the head of the human body can be turned downwards along the wall direction, and the human body can not be fatally damaged;

3. the problem that the existing folding ladder cannot be positioned in time after being moved is solved, and the problem that the existing folding ladder cannot meet the requirement that an operator sits on the folding ladder to stably move and continuously work is solved, and the problems that the gravity center is shifted and overturned in the moving process and the device cannot be stopped and positioned in time in the moving process are solved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of the bottom area of the support leg of the present invention;

fig. 3 is a sectional view of the middle adjusting seat of the present invention;

FIG. 4 is an enlarged view of the bottom area of the leg with a folded surface according to the present invention;

in the figure: the universal wheel comprises a universal wheel 1, a tension mechanism 2, a positioning sleeve 3, a movable sleeve 4, a transverse supporting rod 5, a supporting leg 6, a first driving rod 7, a connecting mechanism 8, a pull rod 9, a sliding groove 10, a top plate 11, a telescopic rod 12, a second driving rod 13, a ladder frame 14, a locking buckle 15, an adjusting block 16, a mounting seat 17, an adjusting seat 18, an angle positioning mechanism 19, a magnet 20, a limiting sheet 21, a locking block 22, a rotary spline 23, an adjusting screw 24 and a contact surface 25.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1-3, a mobile multifunctional folding ladder comprises two hinged top plates 11 and ladder frames 14 respectively arranged at the bottoms of the two top plates 11, wherein each ladder frame 14 comprises two parallel supporting legs 6 arranged at the bottom of the top plate 11 and a plurality of transverse supporting rods 5 arranged between the two supporting legs 6, the bottom of each supporting leg 6 is provided with a universal wheel 1, a movable sleeve 4 is arranged on the supporting leg 6 in a sliding manner, the bottom of the movable sleeve 4 is provided with a positioning sleeve 3, the universal wheel 1 is positioned in the positioning sleeve 3, a tension mechanism 2 is arranged between the movable sleeve 4 or/and the positioning sleeve 3 and the supporting leg 6, the ladder frame 14 is fixed after being contacted with the ground through the universal wheel 1 and the positioning sleeve 3 at the same time, the positioning sleeve 3 generates a downward extrusion locking force to the ground through the tension mechanism 2, the universal wheel 1 passes through the movable sleeve 4 with the position sleeve 3 along supporting legs 6 upwards slides to realizing removing after leaving ground, the gliding that makes progress the movable sleeve 4 with the position sleeve 3 passes through tension mechanism 2 automatic re-setting is same two of ladder frame 14 are parallel on the supporting legs 6 be equipped with coupling mechanism 8 between the movable sleeve 4, it is same on the ladder frame 14 the movable sleeve 4 with the position sleeve 3 is through upwards the pulling coupling mechanism 8 realizes synchronous upwards sliding, adjacent two still be equipped with angle positioning mechanism 19 between the ladder frame 14, two the expansion angle between the ladder frame 14 passes through angle positioning mechanism 19 is locked.

In the actual use process, after the folding ladder is carried to a required position by a worker and the ladder frame 14 is unfolded, because the universal wheels 1 are positioned in the positioning sleeves 3, the bottom of the ladder frame 14 is synchronously contacted with the ground through the universal wheels 1 and the positioning sleeves 3, and the positioning sleeves 3 are firmly and stably embedded in the ground through the downward acting force of the tension mechanisms 2, the universal wheels 1 are prevented from directly moving the folding ladder through the positioning sleeves 3, the situation that the folding ladder moves in the use process is avoided, a user can safely and stably climb and operate in the state, even if the instantaneous tilting of the ladder frame 14 occurs, as long as the tilting is not large, the bottom of the positioning sleeves 3 is ensured to be always contacted with the ground through the tension mechanisms 2, so that the function of a conventional folding ladder is achieved, and when the operator sits on the top plate 11 to construct a higher wall surface or directly fix the top surface, when the position needs to be moved after local construction is finished, the unfolding angle between the two ladder frames 14 is locked through the angle positioning mechanism 19, so that the ladder can not be opened and closed randomly, the stability of the folding ladder is ensured, the ladder can not be moved randomly through the clamping force of feet, the side turning situation caused by the opening and closing movement of folding feet of the conventional folding ladder can not happen, when the folding ladder needs to be moved, the connecting mechanism 8 is lifted upwards by a worker or a worker, the movable sleeve 4 can be driven to slide upwards along the supporting leg 6, the movable sleeve 4 can slide upwards to be away from the ground, at the moment, the whole folding frame is directly contacted with the ground through the universal wheel 1, an operator only needs to apply a certain force to the folding frame in a required direction, the position can be moved relatively, the movement flexibility is high, the movement direction is comprehensive, and after the folding ladder is moved to the required position, the movable sleeve 4 and the positioning sleeve 3 which slide upwards can automatically reset through the tension mechanism 2, so that the positioning sleeve 3 is contacted with the ground again and locked, and the operation personnel can perform safe construction again; secondly, when the constructor moves directly, if the folding ladder is closer to the side wall when processing the side wall, the constructor can lean against or claw the wall surface by hand, pulls the connecting mechanism 8 to move by feet, at the moment, the connecting mechanism moves by combining the strength of the waist and the hip with the strength of the hand, generally moves along the wall, the safety is higher, even if the folding ladder turns on side, the human body inevitably falls down along the wall surface, the speed is slower, the serious injury of the human body can not be caused, when the wall top is operated, if no stable grabbing part exists, because of the universal wheel 1, the constructor inevitably pulls the connecting mechanism 8 to directly move, the constructor can move after climbing down the ladder, thereby the safety of construction is improved, the condition that the constructor directly moves the ladder in an open area is effectively avoided, the two ladder frames 14 of the folding ladder can be locked by the angle positioning mechanism 19 after being unfolded, so that the folding ladder is always in an isosceles triangle state when in use, the center of gravity is centered, and the condition that the included angle is reduced due to external force is avoided, thereby effectively avoiding the situation that an operator directly walks as the extension of feet; universal wheel 1 has all been installed in the bottom of each supporting legs 6, can realize that operating personnel sits and removes under the condition of folding ladder, and it removes under isosceles triangle's state, security and stability are better, more be difficult to turn on one's side, it is high to remove the flexibility, both solved present folding ladder and can't satisfy the problem that operating personnel sat the work of steadily removing and lasting on the folding ladder, avoided again to remove the in-process to appear the focus skew and overturn and remove the problem that the in-process can't in time stop and fix a position.

Preferably, the cross section of the supporting leg 6 is of a square structure, two sliding grooves 10 are symmetrically formed in the supporting leg 6, the cross section of the movable sleeve 4 is of a U-shaped structure, a sliding block is arranged in the movable sleeve 4, and the movable sleeve 4 is arranged in the sliding grooves 10 in a sliding mode through the sliding block.

The cross section of supporting legs 6 is square structure, it is more convenient when installing movable sleeve 4, and the combination that adopts spout 10 and slider between the two slides, it is better to adopt square structural stability, it is more convenient to process, supporting legs 6 can directly make through current section bar, and the slider can adopt gyro wheel or bearing arrangement, the flexibility is better when rolling, the cross section of movable sleeve 4 is U type structure, it has contained supporting legs 6 and has installed all sides outside the lateral surface of the inboard face of horizontal bracing piece 5, whole effect is more pleasing to the eye, and stability is higher, spout 10 runs through the structure from top to bottom generally adopting, and the symmetry sets up on the front and back both sides face of supporting legs 6, it is more convenient when the dismouting, whole volume is littleer.

Furthermore, the locating sleeve 3 is of a horn-shaped structure or a conical structure with a quadrangular cross section, and the top end of the locating sleeve 3 is connected with the bottom of the movable sleeve 4.

The position sleeve 3 is tubaeform structure or cross section is tetragonal toper structure to make it form the parcel form to universal wheel 1, when ground contact, contact surface 25 is long-pending bigger, and stability is higher, can also play the guard action to universal wheel 1, especially when position sleeve 3 is tubaeform structure, all there is the locking force to exist in all directions, makes universal wheel 1 more difficult emergence sudden displacement, and it is also more convenient to process moreover.

Furthermore, as shown in fig. 4, the bottom of the positioning sleeve 3 is provided with 3 to 6 contact surfaces 25 in a planar structure, an included angle between two adjacent contact surfaces 25 is 140 and 160 °, and the ladder rack 14 unfolded at different angles is in contact with the ground through the corresponding contact surfaces 25.

The bottom of the positioning sleeve 3 is processed into 3-6 contact surfaces 25 which are mutually turned at a certain angle, and as the ground of a common construction site is non-smooth or flat, except the contact between the inner side edge of the positioning sleeve 3 and the ground, secondary contact areas can be formed by the contact surfaces 25 and the raised areas on the ground, so that the contact area between the positioning sleeve 3 at the bottom of the whole ladder frame 14 and the ground is wider.

Furthermore, the tension mechanism 2 is composed of a trumpet-shaped tension spring, and two ends of the tension spring are respectively arranged at the bottom of the supporting leg 6 and the inner side of the positioning sleeve 3.

Tension mechanism 2 comprises the tension spring of a tubaeform, after it combines with tubaeform position sleeve 3, can make mutual position relation between the two laminate more, it is quicker when advancing flexible control to position sleeve 3, and life is longer, especially when reset spring one side appears tension lax because of long-term effect, only need to carry out the angle of rotatory removal to it, just can reuse, and life is longer under the request of equal tension, thereby make a reset spring's life turn over 2 times at least, and tension is more even.

Further, universal wheel 1 with adopt screw rod and screw to connect between the supporting legs 6, be equipped with a circular shape spacing piece 21 on the universal wheel 1, spacing piece 21 with the bottom laminating of supporting legs 6, the diameter of spacing piece 21 is greater than supporting legs 6, through 2 downwardly extending of tension mechanism 3 by spacing piece 21 card is died spacingly, the lower extreme opening minimum of position sleeve 3 with distance between the universal wheel 1 is 1 ~ 1.5 cm.

The universal wheel 1 is connected with the supporting legs 6 by screw threads, the disassembly and assembly are more convenient, meanwhile, a limiting piece 21 with the diameter larger than that of the supporting legs 6 is formed on the universal wheel 1, the bottom of the sliding groove 10 can be blocked by the limiting piece 21, the downward extending distance of the positioning sleeve 3 can be limited, the whole limiting sleeve and the movable sleeve 4 can not fall off, one end of the tension spring can be contacted with the bottom of the tension spring, the upper end of the tension spring can be more conveniently limited, the disassembly and assembly are more flexible, the bottom of the positioning sleeve 3 is provided with an annular folded edge which is bent inwards, the outer end of the tension spring is placed in the annular folded edge for fixing, the tension spring can play a three-purpose function by the limiting piece 21, the distance between the lowest value of the opening at the lower end of the positioning sleeve 3 and the universal wheel 1 is 1-1.5 cm, and the positioning sleeve 3 can effectively ensure the contact with, prevent that universal wheel 1 from rolling, when carrying out the dismouting to whole position sleeve 3 and movable sleeve 4 simultaneously, also more convenient.

Further, the connecting mechanism 8 includes a first driving rod 7 disposed between the two movable sleeves 4 and a second driving rod 13 disposed at the top of the two movable sleeves 4, the first driving rod 7 is located between two adjacent transverse supporting rods 5 and has a height of 60-120cm, and the distance between the first driving rod 7 and the closest transverse supporting rod 5 is 3-7 cm.

When the movable sleeve 4 is moved upwards through the connecting mechanism 8, the height of a common human body is 1.5-1.8 meters, so that the first driving rod 7 is positioned between two adjacent transverse supporting rods 5 and is positioned between 60-120cm, a person with normal height can be conveniently pulled upwards or supported by hands to move, the moving space is larger, the distance between the first driving rod 7 and the nearest transverse supporting rod 5 is 3-7cm, the first driving rod can be directly attached to the bottom of the transverse supporting rod 5 after moving upwards, the whole device can be held by the user for moving simultaneously, and when the movable sleeve needs to move upwards and does not need to be lifted completely, the force is more convenient.

Further, second actuating lever 13 includes that two one end switching are in telescopic link 12 on the movable sleeve 4, establish the pull rod 9 between two telescopic links 12, telescopic link 12 is located the inboard of horizontal bracing piece 5, two on the ladder frame 14 the second actuating lever 13 accessible corresponds telescopic link 12 carries out the regulation of height and the rotation of distance each other, second actuating lever 13 is upwards pulled through hand or foot realize upwards sliding behind the pull rod 9, position sleeve 3 is stepped on through the foot on the second actuating lever 13 realize the secondary and fix with the ground lock behind the pull rod 9, pull rod 9 reaches adjusting distance between the roof 11 is 30-60 cm.

The second driving rod 13 is composed of two telescopic rods 12 with two ends connected to the inner side of the movable sleeve 4 in a switching way and a pull rod 9 positioned at the top end of the telescopic rod 12, the switching end of the telescopic rod 12 is positioned at the inner side of the movable sleeve 4, the concealment performance is better when the folding ladder is used, meanwhile, the telescopic rod 12 can turn back and forth along the switching end, so that the pull rod 9 can be positioned between the two ladder frames 14 and also positioned at the outer sides of the ladder frames 14, the transverse position of the pull rod can be adjusted more flexibly, the height position of the pull rod 9 can be adjusted through the telescopic function, and the pull rod can be hooked and pulled by the feet of a human body more conveniently, when the movable sleeve 4 on the two ladder frames 14 needs to slide upwards, the convenience and the flexibility are higher, meanwhile, when the human body sits on the upper surface, after the pull rod 9 on the second driving rod 13 is stepped by the feet, the secondary locking force between, thereby make its fixed more firm, the positioning effect is better, more difficult slip.

Preferably, the angle positioning mechanism 19 includes an adjusting seat 18 and an adjusting block 16 respectively disposed on the two ladder frames 14, the adjusting block 16 is a sheet arc-shaped structure, the adjusting block 16 is inserted into the adjusting seat 18 and extends and retracts along the opening and closing of the ladder frames 14, and the adjusting block 16 in the extended state is locked and fixed by the adjusting seat 18.

When locking through angle positioning mechanism 19 to the angle between two ladder frames 14, because regulating block 16 is flaky arc structure, one end is inserted in adjusting seat 18, when adjusting seat 18 lock and die, just can avoid the flexible removal of regulating block 16, and when needs turned angle, only need loosen adjusting seat 18 and just can be once more make regulating block 16 stretch out and draw back, it is more convenient and flexible to adjust, and adopt the lamellar structure, contact surface 25 is long-pending bigger, it is better to lock after die stability.

Furthermore, one end of the adjusting block 16 is rotatably connected to the supporting leg 6 through a rotating shaft, a magnet 20 is disposed on each of the adjusting block 16 and the supporting leg 6, and the adjusting block 16 that is not inserted into the adjusting seat 18 can be fixed on one side of the supporting leg 6 through the adsorption force of the magnet 20. The magnet 20 on the support leg 6 is located at the lower end of the rotating shaft.

When adjusting block 16 is being stretched out and drawn back, because one end switching is on supporting legs 6, have certain self-adjusting ability at flexible in-process, make it more difficult dead by the card, and when not needing to use, only need extract the back in adjusting block 16 from adjusting seat 18, just can be along the automatic downwardly rotating of rotatory axle head, adjusting block 16 under the pivoted condition rotates when two magnetite 20 are close relatively, can adsorb adjusting block 16 in one side of supporting legs 6 automatically through magnetite 20, thereby make it play the effect of automatic positioning, mention littleer when removing and accomodating, especially when magnetite 20 on supporting legs 6 is located the supporting legs 6 of non-adjusting block 16 installation, after both absorptions, can make the side width of whole folding ladder littleer.

Further, adjust seat 18 including the rectangle mount pad 17 that has the locating hole, establish locking on the mount pad 17 is detained 15, locking is detained 15 and is included establishing the rotatory spline 23 in the mount pad 17 outside, establishing the latch segment 22 of mount pad 17 inboard, establishing rotatory spline 23 with adjusting screw 24 between the latch segment 22, the upper and lower both ends of latch segment 22 are slided and are established on the inside wall of mount pad 17, latch segment 22 passes through the rotation of rotatory spline 23 is carried out translation from beginning to end.

When the adjusting block 16 is locked or loosened by the adjusting seat 18, one end of the adjusting screw 24 is fixed on the rotary spline 23, the other end of the adjusting screw is connected to the locking block 22 in a rotating mode, the upper end and the lower end of the locking block 22 are arranged on the inner side wall of the mounting seat 17 in a sliding mode, and when the rotary spline 23 rotates, the adjusting block 16 can move back and forth along the side wall of the mounting seat 17 through relative rotation of the adjusting screw 24 and the locking block 22, so that locking or loosening of the adjusting block 16 is achieved.

Furthermore, the outer side surface of the adjusting block 16 is of a concave-convex tooth-shaped structure, the tooth shape is of a triangular or conical structure, and the shape of the locking block 22 is matched with the tooth shape.

The adjusting block 16 and the locking block 22 are locked relatively by adopting a tooth form with a concave-convex structure, and the stability is better when the adjusting block and the locking block are locked.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (10)

1. The utility model provides a portable multipotency folding ladder, includes two articulated roofs, establishes respectively two the ladder frame of roof bottom, the ladder frame is including establishing the supporting legs of two parallels of roof bottom, establish a plurality of transverse support pole between two supporting legs, its characterized in that: the bottom of each supporting leg is provided with a universal wheel, a movable sleeve is arranged on the supporting legs in a sliding manner, the bottom of the movable sleeve is provided with a positioning sleeve, the universal wheel is positioned in the positioning sleeve, a tension mechanism is arranged between the movable sleeve or/and the positioning sleeve and the supporting legs, the ladder frame is fixed after being simultaneously contacted with the ground through the universal wheel and the positioning sleeve, the positioning sleeve generates downward extrusion locking force on the ground through the tension mechanism, the universal wheel slides upwards along the supporting legs through the movable sleeve and the positioning sleeve to move after leaving the ground, the movable sleeve and the positioning sleeve which slide upwards automatically reset through the tension mechanism, a connecting mechanism is arranged between the movable sleeves on two parallel supporting legs of the same ladder frame, and the movable sleeve and the positioning sleeve on the same ladder frame realize synchronous upwards sliding through upwards pulling the connecting mechanism, and an angle positioning mechanism is further arranged between every two adjacent ladder frames, and the unfolding angle between the two ladder frames is locked by the angle positioning mechanism.

2. A mobile multi-energy attic ladder as claimed in claim 1, wherein: the cross section of the supporting leg is of a square structure, two sliding grooves are symmetrically formed in the supporting leg, the cross section of the movable sleeve is of a U-shaped structure, a sliding block is arranged in the movable sleeve, and the movable sleeve is arranged in the sliding grooves in a sliding mode through the sliding block.

3. A mobile multi-energy attic ladder as claimed in claim 2, wherein: the locating sleeve is of a horn-shaped structure or a conical structure with a quadrangular cross section, and the top end of the locating sleeve is connected with the bottom of the movable sleeve.

4. A mobile multi-energy attic ladder as claimed in claim 3, wherein: the bottom of the positioning sleeve is provided with 3-6 contact surfaces in a planar structure, the included angle between every two adjacent contact surfaces is 140 degrees and 160 degrees, and the ladder frames unfolded to different angles are in contact with the ground through the corresponding contact surfaces.

5. A mobile multi-energy attic ladder as claimed in claim 3, wherein: the tension mechanism is composed of a horn-shaped tension spring, and two ends of the tension spring are respectively arranged at the bottom of the supporting leg and the inner side of the positioning sleeve.

6. A mobile multi-energy attic ladder as claimed in claim 1, wherein: the connecting mechanism comprises a first driving rod arranged between the two movable sleeves and a second driving rod arranged at the tops of the two movable sleeves, the first driving rod is positioned between the two adjacent transverse supporting rods and is 60-120cm high, and the first driving rod is 3-7cm lower than the nearest transverse supporting rod.

7. The mobile multi-energy attic ladder of claim 6, wherein: the second actuating lever includes that two one end switching are in telescopic link on the movable sleeve, establish the pull rod between two telescopic links, the telescopic link is located the inboard of horizontal bracing piece, two on the ladder frame the second actuating lever accessible corresponds the telescopic link carries out the regulation of height and the rotation of distance each other, the second actuating lever is upwards stimulateed through hand or foot realize upwards sliding behind the pull rod, the position sleeve is stepped on through the foot on the second actuating lever realize behind the pull rod that the secondary is died fixedly with the ground lock.

8. A mobile multi-energy attic ladder as claimed in claim 1, wherein: the angle positioning mechanism comprises an adjusting seat and an adjusting block which are respectively arranged on the ladder frame, the adjusting block is of a sheet arc-shaped structure and is inserted into the adjusting seat and extends along the opening and closing of the ladder frame, and the adjusting block in the extending state is locked and fixed through the adjusting seat.

9. A mobile multi-energy attic ladder as claimed in claim 8, wherein: one end of the adjusting block is connected to the supporting legs in a rotating mode through a rotating shaft, a magnet is arranged on each of the adjusting block and the supporting legs, and the adjusting block which is not inserted into the adjusting seat can be fixed to one side of the supporting legs through the adsorption force of the magnet.

10. A mobile multi-energy attic ladder as claimed in claim 9, wherein: adjust the seat including the rectangle mount pad that has the locating hole, establish locking on the mount pad is detained, locking is detained including establishing the rotatory spline in the mount pad outside, establishing the inboard latch segment of mount pad, establishing rotatory spline with adjusting screw between the latch segment, the upper and lower both ends of latch segment are slided and are established on the inside wall of mount pad, the latch segment passes through translation around the rotation of rotatory spline carries out.

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