CN110056304B

CN110056304B - Novel multifunctional ladder

Info

Publication number: CN110056304B
Application number: CN201910192714.XA
Authority: CN
Inventors: 郭子豪; 胡高全; 黄锡海; 刘奔; 杨敏
Original assignee: Wuhan University of Science and Engineering WUSE
Current assignee: Wuhan University of Science and Engineering WUSE
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2021-02-09
Anticipated expiration: 2039-03-14
Also published as: CN110056304A

Abstract

The invention relates to a novel multifunctional ladder, which comprises two support legs and two bases, wherein the two support legs are respectively obliquely arranged, the upper ends of the two support legs are hinged through a connecting fixing piece, the two bases are respectively positioned between the two support legs, and the ends, deviating from each other, of the two bases are respectively hinged with the lower ends of the two support legs through the connecting fixing piece; the supporting legs comprise a plurality of ladder composition units, and two adjacent ladder composition units are connected through connecting pieces; the ladder component unit is formed by connecting two supporting rods arranged side by side at intervals and a plurality of telescopic cross rods, and the plurality of cross rods are arranged between the two supporting rods at intervals side by side in a sliding manner. The ladder has the advantages of being capable of serving as a straight ladder and a goods pulling vehicle, flexible and convenient to transform, multifunctional, convenient to use and high in applicability.

Description

Novel multifunctional ladder

Technical Field

The invention relates to the technical field of daily supplies, in particular to a novel multifunctional ladder.

Background

The ladder is a tool for climbing and ascending, two long thick rods are used as fixed edges, and a cross rod for treading is transversely arranged between the two long thick rods; the ladder is also visible everywhere in life, and has extremely wide application; along with different use occasions, different use requirements and the like, the ladder gradually evolves from the simplest structure, and a plurality of more practical functions are added, for example, for convenience of storage, the foldable ladder is developed and produced, is unfolded when in use, can be folded for storage after use, occupies a small space, can be firmly and firmly worked, ensures good support performance when in unfolding, and is safe and reliable; because the folding ladder can be convenient for accomodate, the advantage of carrying, consequently can be used to occasions such as various civil engineering, finishing work or electric wire netting maintenance, brought a lot of convenience for the staff. Most of ladders seen by people in the prior art are herringbone ladders or straight ladders, and the function is single, so that certain inconvenience is caused to maintenance personnel, and the ladders are difficult to be applied to different operation ranges.

Disclosure of Invention

The invention aims to solve the technical problem of providing a novel multifunctional ladder which can be used as a straight ladder and a goods pulling vehicle, is flexible and convenient to transform, has various functions, is convenient to use and has strong applicability.

The technical scheme for solving the technical problems is as follows:

a novel multifunctional ladder comprises two supporting legs and two bases, wherein the two supporting legs are respectively arranged in an inclined mode, the upper ends of the two supporting legs are hinged through a connecting fixing piece, the two bases are respectively located between the two supporting legs, and the ends, away from each other, of the two bases are respectively hinged to the lower ends of the two supporting legs through the connecting fixing piece; the supporting legs comprise a plurality of ladder composition units, and two adjacent ladder composition units are connected through connecting pieces; the ladder component unit is formed by connecting two supporting rods arranged side by side at intervals and a plurality of telescopic cross rods, and the cross rods are arranged between the supporting rods at intervals side by side in a sliding mode.

The invention has the beneficial effects that: the two support legs are provided with the inverted V-shaped ladder climbing part through the connecting fixing piece, the two bases are respectively hinged with the lower ends of the two support legs, and the bases play a role in supporting the whole ladder, so that people can conveniently take articles at a high place by using the ladder provided by the application; the landing legs comprise a plurality of ladder composition units, different numbers of ladder composition units can be selected according to actual requirements to assemble the landing legs with different heights, the operation height is adjusted to meet different requirements of people, and the landing legs are convenient to use; in addition, the length and the quantity of the transverse rods can be adjusted according to actual requirements, the climbing device can be suitable for climbing of different crowds, and the universality is high.

On the basis of the technical scheme, the invention can be further improved as follows.

Furthermore, the connecting and fixing part comprises a connecting shell connected with any one of the end parts of the supporting legs, a connector connected with the rest of the end part of the supporting leg or the end part of the base, a turntable and a positioning assembly, wherein the turntable is rotatably arranged in the connecting shell; the connector is arranged outside the connecting shell, one end of the connector extends into the connecting shell and is connected with the turntable, the connector rotates along with the turntable, and the connecting shell is provided with a first opening matched with the rotating track of the connector; the positioning assembly is arranged in the connecting shell to position the rotary disc.

The adoption of the further scheme has the beneficial effects that the connector is rotationally connected with the connecting shell through the turntable, so that the angle can be conveniently adjusted, and the opening degree between the two support legs can be adjusted; after the adjustment of the connector is completed, the turntable is positioned by the positioning assembly so as to fix the two supporting legs, and the operation is simple and convenient.

Furthermore, the positioning assembly comprises a first sliding block, a fixed rod, a handle and a first spring, the connecting shell is provided with a first sliding groove communicated with the inside of the connecting shell along the radial direction of the rotary table, the first sliding block is arranged in the first sliding groove in a sliding manner, and a plurality of positioning grooves matched with the first sliding block are arranged on the circumference of the rotary table at intervals; the dead lever slides and sets up in the spout one and its one end with the slider one is kept away from the one end of constant head tank is connected, the spring set is established the slider one with on the dead lever, the handle sets up connect the casing outer and its one end extend to in the spout one and with the slider one is connected, the one end of spring one with the handle butt, the other end with the tank bottom butt of spout one, be equipped with on the connection casing along a slider slip direction set up and with the opening five of spout one intercommunication.

The technical scheme has the advantages that when the turntable needs to be rotated, the first sliding block is manually pushed to be away from the turntable through the handle, and the first spring is in a compressed state; after the turntable rotates to a set position, the handle is loosened, the first sliding block is gradually close to the turntable under the elastic tension of the first spring, and one end of the first sliding block is inserted into the corresponding positioning groove, so that the turntable is positioned, the turntable is prevented from rotating, and the operation is simple and convenient.

The cross rod comprises a first cross rod, a second cross rod and a locking assembly, the second cross rod is hollow, one end of the second cross rod is open, and the other end of the second cross rod is connected with any one of the support rods in a sliding mode; one end of the first cross rod extends into the opening at one end of the second cross rod and is in sliding connection with the second cross rod, the other end of the first cross rod is in sliding connection with the rest of the support rods, and the locking assembly is installed at one end of the first cross rod or one end of the second cross rod to fix the first cross rod and the second cross rod; and the opposite sides of the two support rods are respectively provided with a second sliding groove matched with the first cross rod and the second cross rod.

The transverse rod I is slidably arranged in the transverse rod II so as to be convenient for adjusting the length of the transverse rod, facilitate climbing operation on different occasions or different crowds, and have convenient use and strong universality; after the cross rod is adjusted to the set length, the cross rod is positioned through the clamping and locking assembly, the structure is simple, and the operation is simple and convenient.

Further, the clamping and locking assembly comprises a shell matched with the cross rod in shape, and a sliding plate, a positioning pin and at least one second spring which are arranged in the shell, wherein the shell is slidably arranged in the second cross rod and is connected with one end of the first cross rod; the second spring is arranged along the axial direction perpendicular to the second cross rod, one end of the second spring is connected with the inner side wall of the shell, the sliding plate is arranged along the axial direction of the second cross rod, and one side of the sliding plate is abutted to the other end of the second spring; the locating pin is along the perpendicular to the axial setting of horizontal pole two and its one end with the opposite side of slide is connected, be equipped with a plurality of locating holes along its axial interval on the lateral wall of horizontal pole two, the other end of locating pin passes the casing and with the cooperation of locating hole joint, be equipped with the confession on the casing the through-hole that the locating pin passed.

The beneficial effects of adopting above-mentioned further scheme are that during the adjustment, press the locating pin so that it contracts to horizontal pole two in through the manual work, then slide horizontal pole one to locating pin to corresponding locating hole department, the other end at the locating pin inserts in corresponding locating hole under the effect of two elastic tension of spring this moment to fix a position horizontal pole two, simple structure, easy and simple to handle.

Furthermore, the cross section of the shell is rectangular, a shifting block used for shifting the sliding plate is arranged on one side of the sliding plate, an opening II matched with the shifting track of the shifting block is arranged on the shell, and an opening III matched with the shifting block is arranged on the cross rod II along the axial direction of the cross rod II.

The beneficial effect who adopts above-mentioned further scheme is that make things convenient for people to stir the slide through the shifting block to make the locating pin shrink to the horizontal pole two in, easy and simple to handle.

Furthermore, a roller assembly is arranged on the branch rod, the roller assembly comprises a main rod, a universal wheel, a fourth connecting rod, a fifth connecting rod and a positioning piece, one end of the main rod is hinged with the branch rod, the universal wheel is rotatably arranged at the other end of the main rod, and the positioning piece is arranged on the branch rod and used for positioning one end of the main rod; one end of the connecting rod IV is hinged with the supporting rod, one end of the connecting rod V is hinged with the other end of the connecting rod IV, and the other end of the connecting rod V is hinged with one end, close to the universal wheel, of the main rod.

Adopt above-mentioned further scheme's beneficial effect to put two landing legs flat and make the two be in on the same horizontal plane, then take off the mobile jib on every branch and make it be vertical form to fix a position the mobile jib, thereby form one and draw the freight train to use, adjust convenient flexibility, the function is various, convenient to use.

Further, the upside of branch is equipped with guardrail mechanism, guardrail mechanism includes guard bar, lift subassembly and at least one connecting rod one, guard bar parallel arrangement is in the top of branch, lift subassembly with one connecting rod is installed respectively the guard bar with between the branch, just lift subassembly upper end and lower extreme and upper end and the lower extreme of connecting rod one respectively with the guard bar with branch is articulated.

Adopt above-mentioned further scheme's beneficial effect be when changing the ladder into to draw the train to use, the manual work is adjusted lifting unit and is made the fender rod rise to play the guard action to the goods of transport, prevent that the goods from landing from pulling the freight train, protection goods.

Furthermore, the lifting assembly comprises a second connecting rod, a third connecting rod, a second sliding block and a sliding block shell, two ends of the second connecting rod are respectively hinged with the guard bar and the support rod, and one end of the third connecting rod is hinged with the second connecting rod; the sliding block shell is arranged on the support rod, the second sliding block is axially and slidably arranged in the sliding block shell along the support rod, and a position, close to one end, in the sliding block shell is provided with a limiting groove for limiting the second sliding block; one side of the second sliding block is hinged with the other end of the third connecting rod, and the side wall of the sliding block shell is provided with a fourth opening with the same track as that of the second sliding block.

The beneficial effect of adopting the further proposal is that the second sliding block is manually pushed by the third connecting rod to be far away from the second connecting rod and slide to the limiting groove of the second sliding block, thereby lifting the guard bar; when the guard bar needs to be folded, the second sliding block is lifted up from the limiting groove through the third connecting rod manually, and then the second sliding block is pushed to be close to the second connecting rod, so that the guard bar is folded, the structure is simple, and the operation is simple and convenient.

Further, the base includes two knee rods, the one end of knee rod is passed through respectively connect the mounting with be located arbitrary two of landing leg bottom the one end of branch is articulated, arbitrary one the other end cavity of knee rod is uncovered, and its slip cover is established the surplus on the other end of knee rod.

Adopt the beneficial effect of above-mentioned further scheme to be the other end of arbitrary knee and the other end sliding connection of remaining knee to the base need not locating component according to the width adaptability's of landing leg adjustment, simple structure, and is easy and simple to handle.

Drawings

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

FIG. 2 is a schematic structural view of a ladder assembly of the present invention;

FIG. 3 is an enlarged view of B in FIG. 2;

FIG. 4 is a schematic view of the latch assembly of the present invention;

FIG. 5 is an expanded view of the assembly of the ladder assembly unit, guardrail mechanism and roller assemblies of the present invention;

FIG. 6 is an enlarged view of C in FIG. 5;

FIG. 7 is a close-up view of the assembly of the ladder assembly unit, guardrail mechanism and roller assemblies of the present invention;

FIG. 8 is a schematic view of the connecting fixture according to the present invention;

FIG. 9 is a second schematic view of the connecting fastener of the present invention;

FIG. 10 is a cross-sectional view taken along line A-A of FIG. 9;

FIG. 11 is a schematic structural view of a base in the present invention;

fig. 12 is a schematic view of the present invention in a configuration for converting into a wagon.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the support leg, 11, a support rod, 12, a cross rod, 121, a first cross rod, 122, a second cross rod, 123, a locking assembly, 1231, a housing, 1232, a sliding plate, 1233, a positioning pin, 1234, a second spring, 1235, a shifting block, 124, a positioning hole, 2, a base, 21, a bent rod, 3, a connecting fixing member, 31, a connecting housing, 32, a turntable, 33, a connector, 34, a positioning assembly, 341, a first slider, 342, a fixing rod, 343, a handle, 344, a first spring, 4, a guardrail mechanism, 41, a guard bar, 42, a lifting assembly, 421, a second link, 422, a third link, 423, a second slider, 424, a slider housing, 43, a first link, 5, a roller assembly, 51, a main rod, 52, a universal wheel, 53, a fourth link, 54, a fifth link, 55, and a positioning member.

Detailed Description

The principles and features of this invention are described in connection with the drawings and the detailed description of the invention, which are set forth below as examples to illustrate the invention and not to limit the scope of the invention.

As shown in fig. 1 to 12, the invention provides a novel multifunctional ladder, which comprises two support legs 1 and two bases 2, wherein the two support legs 1 are respectively arranged in an inclined manner, the upper ends of the two support legs 1 are hinged through a connecting fixing piece 3, the two bases 2 are respectively positioned between the two support legs 1, and the ends of the two bases 2, which are mutually deviated from each other, are respectively hinged with the lower ends of the two support legs 1 through the connecting fixing piece 3; the landing leg 1 comprises a plurality of ladder composition units, and two adjacent ladder composition units are connected through a connecting piece; the ladder component unit is formed by connecting two struts 11 arranged side by side at intervals and a plurality of telescopic cross rods 12, and the plurality of cross rods 12 are arranged between the two struts 11 at intervals side by side and slidably. The two support legs 1 are provided with an inverted V-shaped ladder climbing part through connecting and fixing pieces 3, the two bases 2 are respectively hinged with the lower ends of the two support legs 1, and the bases 2 play a role in supporting the whole ladder, so that people can conveniently take articles at a high place by using the ladder provided by the application; the landing leg 1 comprises a plurality of ladder composition units, different numbers of ladder composition units can be selected according to actual requirements to assemble the landing legs 1 with different heights, the operation height is adjusted to meet different requirements of people, and the landing leg is convenient to use; in addition, the length and the quantity of horizontal pole 12 all can be adjusted according to actual demand, can be applicable to different crowds' climbing, and the commonality is stronger.

As shown in fig. 8 to 10, in the present invention, the connecting and fixing member 3 includes a connecting housing 31 connected to an end of any one of the legs 1, a connecting head 33 connected to an end of the remaining leg 1 or an end of the base 2, a rotating disc 32, and a positioning assembly 34, wherein two ends of each supporting rod 11 are provided with an extending portion, and the extending portions are integrally formed with the supporting rods 11; the other end of connecting shell 31 and connector 33 is equipped with the recess that matches with corresponding extension, and is equipped with the interval screw on the lateral wall of extension and recess respectively, links together extension and connecting shell 31 or extension and connector 33 through the screw, easy dismounting. The rotary table 32 is rotatably installed in the connecting shell 31, a central shaft is arranged at the center of the rotary table 32 along the axial direction of the rotary table, two ends of the central shaft are respectively rotatably connected with two sides of the connecting shell 31, and through holes for two ends of the central shaft to pass through are arranged on two sides of the connecting shell 31; the connecting head 33 is arranged outside the connecting shell 31, one end of the connecting head 33 extends into the connecting shell 31 and is connected with the turntable 32, the connecting head 33 and the turntable 32 are integrally formed, the connecting head 33 rotates along with the turntable 32, an opening I matched with the rotating track of the connecting head 33 is formed in the connecting shell 31, and the opening I is an arc-shaped opening; a positioning assembly 34 is disposed within the coupling housing 31 to position the turntable 32. When the ladder is assembled, the connector 33 is rotatably connected with the connecting shell 31 through the turntable 32, so that the angle can be conveniently adjusted, and the opening degree between the two support legs 1 can be adjusted; after the adjustment of the connector 33 is completed, the turntable 32 is positioned by the positioning assembly 34 to fix the two support legs 1, and the operation is simple.

In the invention, the positioning assembly 34 comprises a first sliding block 341, a fixed rod 342, a handle 343 and a first spring 344, the connecting shell 31 is provided with a first sliding groove communicated with the inside thereof along the radial direction of the rotating disc 32, the first sliding block 341 is arranged in the first sliding groove in a sliding manner, and a plurality of positioning grooves 321 matched with the first sliding block 341 are arranged on the circumference of the rotating disc 32 at intervals; the fixed rod 342 is slidably arranged in the first sliding groove, one end of the fixed rod 342 is connected with one end of the first sliding block 341 far away from the positioning groove 321, and the fixed rod 342 and the first sliding block 341 are integrally formed; the first spring 344 is sleeved on the first sliding block 341 and the fixed rod 342, the handle 343 is arranged outside the connecting shell 31, one end of the handle 343 extends into the first sliding groove and is connected (welded) with the first sliding block 341, one end of the first spring 344 abuts against the handle 343, the other end of the first spring abuts against the groove bottom of the first sliding groove, a fifth opening which is arranged along the sliding direction of the first sliding block 341 and is communicated with the first sliding groove is arranged on the connecting shell 31, and the fifth opening is a strip-shaped opening. When the rotating disc 32 needs to be rotated, the first slider 341 is manually pushed by the handle 343 to be away from the rotating disc 32, and the first spring 344 is in a compressed state; after the rotary disc 32 rotates to the set position, the handle 343 is loosened, the first slider 341 gradually approaches the rotary disc 32 under the elastic tension of the first spring 344 and one end of the first slider is inserted into the corresponding positioning groove 321, so that the rotary disc 32 is positioned, the rotary disc 32 is prevented from rotating, the operation is simple and convenient, and the stability of the whole ladder is ensured.

In addition, the fixing rod 342 and the first slider 341 are separately arranged, one end of the fixing rod 342 is welded with one end of the first slider 341, the radial dimension of the fixing rod 342 is smaller than that of the first slider 341, the fixing rod 342 is sleeved by the first spring 344, and two ends of the first spring 344 are respectively abutted to the bottom of the first sliding slot of the first slider 341. As shown in fig. 2 to 7, in the present invention, the cross bar 12 includes a first cross bar 121, a second cross bar 122 and a locking assembly 123, the second cross bar 122 is hollow and has one end open, and the other end of the second cross bar 122 is slidably connected to any one of the support rods 11; one end of the first cross bar 121 extends into the opening at one end of the second cross bar 122 and is connected with the second cross bar 122 in a sliding manner, the other end of the first cross bar 121 is connected with the rest of the support rods 11 in a sliding manner, and the locking assembly 123 is arranged at one end of the first cross bar 121 or the second cross bar 122 to fix the first cross bar 121 or the second cross bar 122; and the opposite sides of the two support rods 11 are respectively provided with a second sliding groove matched with the first cross rod 121 and the second cross rod 122, and the second sliding groove is formed by inwards recessing the surfaces of the support rods 11. When the length of the cross rod 12 needs to be adjusted, the first cross rod 121 is slidably mounted in the second cross rod 122 so as to adjust the length of the cross rod 12, so that the climbing operation on different occasions or different crowds is facilitated, the use is convenient, and the universality is strong; after the cross rod 12 is adjusted to a set length, the positioning is carried out through the clamping lock assembly 123, the structure is simple, and the operation is simple and convenient.

In the invention, the latch assembly 123 comprises a housing 1231 matched with the shape of the second cross bar 122, and a sliding plate 1232, a positioning pin 1233 and at least one second spring 1234 which are installed in the housing 1231, wherein the housing 1231 is slidably installed in the second cross bar 122 and connected with one end of the first cross bar 121, the housing 1231 is welded with one end of the first cross bar 121 or connected together through a bolt, the second spring 1234 is arranged along an axial direction perpendicular to the second cross bar 122 and one end of the second spring 1234 is connected (welded) with the inner side wall of the housing 1231, the sliding plate 1232 is arranged along the axial direction of the second cross bar 122 and one side of the sliding plate 1232 abuts against the other end of the second spring 1234, and the other end of the second spring 1234 can also be welded; the positioning pin 1233 is arranged along the axial direction perpendicular to the second cross rod 122, and one end of the positioning pin 1233 is connected (welded) to the other side of the sliding plate 1232, the side wall of the second cross rod 122 is provided with a plurality of positioning holes 124 at intervals along the axial direction, the other end of the positioning pin 1233 penetrates through the housing 1231 and is in clamping fit with the positioning holes 124, and the housing 1231 is provided with a through hole for the positioning pin 1233 to penetrate through. During adjustment, the positioning pin 1233 is manually pressed to be contracted into the second cross rod 122, then the first cross rod 121 is slid to the positioning pin 1233 to the corresponding positioning hole 124, and the other end of the positioning pin 1233 is inserted into the corresponding positioning hole 124 under the action of the elastic tension of the second spring 1234, so that the second cross rod 122 is positioned, the structure is simple, and the operation is simple and convenient. Preferably, in the present invention, the cross section of the housing 1231 is rectangular, one side of the sliding plate 1232 is provided with a shifting block 1235 for shifting the sliding plate 1232 to slide, and the shifting block 1235 and the sliding rod 1232 are integrally formed; the shell 1231 is provided with a second opening matched with the shifting track of the shifting block 1235, the second cross rod 122 is provided with a third opening matched with the shifting block 1235 along the axial direction of the second cross rod, and the second opening and the third opening are both strip-shaped openings. When the length of the cross rod 12 is adjusted, people can toggle the sliding plate 1232 through the shifting block 1235, so that the positioning pin 1233 can be contracted into the second cross rod 122, and the operation is simple and convenient.

As shown in fig. 5, in the present invention, the supporting rod 11 is provided with the roller assemblies 5, and the roller assemblies 5 are installed at the sides of the supporting rods 11 which are away from each other; the roller assembly 5 comprises a main rod 51, a universal wheel 52, a four-link 53, a five-link 54 and a positioning piece 55, wherein one end of the main rod 51 is hinged with the support rod 11, and is usually hinged by a hinge; the universal wheel 52 is rotatably mounted at the other end of the main rod 51, a U-shaped mounting rack is arranged at the other end of the main rod 51, and the universal wheel 52 is rotatably mounted in the U-shaped mounting rack through a rotating shaft. The positioning piece 55 is mounted on the supporting rod 11 and positions one end of the main rod 51, the positioning piece 55 here includes a positioning seat, the positioning seat is mounted on the supporting rod 11 near one end of the main rod 51, the positioning seat and the main rod 51 are respectively provided with a screw hole, and when the main rod 51 rotates to a set position, the main rod 51 is positioned through a bolt; one end of the four connecting rods 53 is hinged with the supporting rod 11, and the specific connection mode is as follows: a rotating seat is arranged on the supporting rod 11, and one end of a connecting rod 53 is rotatably connected with the supporting rod 11 through a pin shaft; one end of the five connecting rod 54 is hinged to the other end of the four connecting rod 53, and usually rotates by using a pin, the other end is hinged to one end of the main rod 51 close to the universal wheel 52, a rotating shaft is arranged at the corresponding end of the main rod 51, and the other end of the five connecting rod 54 is rotatably connected with the rotating shaft. Lay two landing legs 1 flat and make the two be in on the same horizontal plane, then take off mobile jib 51 on every branch 11 and make it be vertical form to fix a position mobile jib 51, thereby form one and draw the freight train to use, adjust convenient flexibility, the function is various, convenient to use.

In addition, the support rod 11 is also provided with a turnover plate, the turnover plate is arranged parallel to the support rod 11, and one side of the turnover plate is hinged with the support rod 11, usually by a hinge; the turnover plate is provided with at least one screw hole, the support rod 11 is provided with a plurality of screw holes matched with the screw holes on the turnover plate, and the turnover plate and the support rod 11 are fixed together through bolts when the turnover plate is turned over to be attached to the support rod 11 or is parallel to the support rod 11. Whole wheel components 5 are installed on the returning face plate, and concrete mounting means does: the positioning seat is arranged on the turnover plate and is integrally formed with the turnover plate; the turnover plate is provided with a rotating seat, the rotating seat and the turnover plate are integrally formed, and one end of the connecting rod 53 is rotatably connected with the rotating seat through a pin shaft; one end of the main rod 51 is hinged with the turning plate through a hinge.

As shown in fig. 5 and 6, in the present invention, a guardrail mechanism 4 is provided on an upper side of the strut 11, the guardrail mechanism 4 includes a guard bar 41, a lifting assembly 42 and at least one first connecting rod 43, the guard bar 41 is provided in parallel above the strut 11, the lifting assembly 42 and the first connecting rod 43 are respectively installed between the guard bar 41 and the strut 11, and upper and lower ends of the lifting assembly 42 and upper and lower ends of the first connecting rod 43 are respectively hinged to the guard bar 41 and the strut 11, the upper and lower ends of the lifting assembly 42 and the upper and lower ends of the first connecting rod 43 refer to the upper and lower ends of the lifting assembly 42 and the upper and lower ends of the first connecting rod 43 when the guard bar 41 is lifted when the ladder is used as a pull cart; the hinge seat is arranged on the support rod 11 and integrally formed with the support rod 11, and the lower end of the first connecting rod 43 is hinged with the hinge seat through a rotating shaft; in addition, a fixed shaft is arranged at the corresponding end of the guard bar 41, the fixed shaft and the guard bar 41 are integrally formed, and the upper end of the first connecting rod 43 is rotatably connected with the fixed shaft. When the ladder is changed into a train for use, the protection rod 41 is lifted by manually adjusting the lifting assembly 42, so that the carried goods are protected, the goods are prevented from sliding off the train, and the goods are protected. Here, the number of the lifting assemblies 42 is preferably two, and the two lifting assemblies are respectively disposed at both ends of the guard bar 41 to increase the stability of the guard bar 41.

In the invention, the lifting assembly 42 comprises a second connecting rod 421, a third connecting rod 422, a second sliding block 423 and a sliding block shell 424, two ends of the second connecting rod 421 are respectively hinged with the guard bar 41 and the supporting rod 11, a hinge seat is arranged on the supporting rod 11, and one end of the second connecting rod 421 is rotatably connected with the hinge seat through a rotating shaft; in addition, a fixed shaft is arranged at the corresponding end of the guard bar 41, the fixed shaft and the guard bar 41 are integrally formed, and the upper end of the second connecting rod 421 is rotatably connected with the fixed shaft. One end of the third connecting rod 422 is hinged with the second connecting rod 421, and the two are hinged through a pin shaft; the slider housing 424 is mounted to the strut 11, the slider housing 424 being mounted to the strut 11 by means conceivable to one of ordinary skill in the art, such as welding or bolting; the second sliding block 423 is axially and slidably mounted in the sliding block shell 424 along the supporting rod 11, and a limiting groove for limiting the second sliding block 423 is formed in the sliding block shell 424 and is close to one end; one side of the second sliding block 423 is hinged with the other end of the third connecting rod 422, the second sliding block 423 is provided with a fixed shaft, and the other end of the third connecting rod 422 is rotatably connected with the fixed shaft; the side wall of the sliding block shell 424 is provided with a fourth opening with the same track as the second sliding block 423. Manually pushing the second sliding block 423 through the third connecting rod 422 to enable the second sliding block 423 to be far away from the second connecting rod 421, enabling the second sliding block 423 to slide into the limiting groove, and accordingly lifting the guard bar 41; when the guard bar 41 needs to be retracted, the second sliding block 423 is manually lifted from the limiting groove through the third connecting rod 422, and then the second sliding block 423 is pushed to be close to the second connecting rod 421, so that the guard bar 41 is retracted, the structure is simple, and the operation is simple and convenient.

As shown in fig. 11, the base 2 includes two bent rods 21, one end of each bent rod 21 is hinged to one end of each of the two support rods 11 at the bottom of any one of the support legs 1 through a connecting fixing member 3, and the other end of any one of the bent rods 21 is hollow and open, and is slidably sleeved on the other end of the rest bent rods 21. The other end of any bent rod 21 is connected with the other end of the rest bent rods 21 in a sliding manner, so that the base 2 can be adjusted according to the width adaptability of the supporting leg 1 without a positioning assembly, and the device is simple in structure and convenient to operate.

The use principle of the invention is as follows:

according to the requirements of actual climbing operation, the number of the ladder composition units is selected, and two adjacent ladder composition units are connected together through a connecting fixing piece 3, so that two support legs 1 are supported to form an inverted V-shaped ladder; one ends of the two bases 2, which are deviated from each other, are respectively connected with the lower ends of the two supporting legs 1 through connecting and fixing pieces 3; the width between the two supporting legs 1 is adjusted according to actual requirements, the assembly of the ladder is completed, and the guardrail mechanism 4 and the roller component 5 are in a retracted state at the moment;

when the ladder needs to be assembled into a cargo carrying vehicle for use, the two support legs 1 are firstly pulled into a straight line, the roller assemblies 5 on the support rods 11 are completely unfolded, and then the whole device is turned over, so that the roller assemblies 5 support the whole device, and the cargo carrying vehicle is formed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A novel multifunctional ladder is characterized in that: the foldable support comprises two support legs (1) and two bases (2), wherein the two support legs (1) are respectively arranged in an inclined mode, the upper ends of the two support legs (1) are hinged through a connecting fixing piece (3), the two bases (2) are respectively positioned between the two support legs (1), and the ends, which are deviated from each other, of the two bases (2) are respectively hinged with the lower ends of the two support legs (1) through the connecting fixing piece (3); the supporting leg (1) comprises a plurality of ladder composition units, and two adjacent ladder composition units are connected through a connecting piece; the ladder forming unit is formed by connecting two support rods (11) arranged side by side at intervals and a plurality of telescopic cross rods (12), and the cross rods (12) are arranged between the two support rods (11) at intervals side by side and slidably; wheel components (5) are installed in the pivoted that can fix a position on branch (11), and its upside still is equipped with guardrail mechanism (4), guardrail mechanism (4) are including guard bar (41), lifting unit (42) and at least one connecting rod (43), guard bar (41) parallel arrangement is in the top of branch (11), lifting unit (42) with connecting rod (43) are installed respectively guard bar (41) with between branch (11), just lifting unit (42) upper end and lower extreme and the upper end and the lower extreme of connecting rod (43) respectively with guard bar (41) with branch (11) are articulated.

2. The novel multifunctional ladder of claim 1, characterized in that: the connecting and fixing part (3) comprises a connecting shell (31) connected with the end part of any one of the supporting legs (1), a connector (33) connected with the end part of the rest supporting leg (1) or the end part of the base (2), a turntable (32) and a positioning assembly (34), wherein the turntable (32) is rotatably installed in the connecting shell (31); the connecting head (33) is arranged outside the connecting shell (31), one end of the connecting head extends into the connecting shell (31) and is connected with the rotary table (32), the connecting head (33) rotates along with the rotary table (32), and the connecting shell (31) is provided with a first opening matched with the rotating track of the connecting head (33); the positioning assembly (34) is disposed within the connection housing (31) to position the turntable (32).

3. The novel multifunctional ladder of claim 2, characterized in that: the positioning assembly (34) comprises a first sliding block (341), a fixed rod (342), a handle (343) and a first spring (344), the first connecting shell (31) is provided with a first sliding groove along the radial direction of the rotating disc (32), the first sliding block (341) is arranged in the first sliding groove in a sliding manner, and a plurality of positioning grooves (321) matched with the first sliding block (341) are arranged on the circumference of the rotating disc (32) at intervals; the fixing rod (342) is arranged in the first sliding groove in a sliding mode, one end of the fixing rod is connected with one end, far away from the positioning groove (321), of the first sliding block (341), the first spring (344) is sleeved on the first sliding block (341) and the fixing rod (342), the handle (343) is arranged outside the connecting shell (31), one end of the handle (343) extends into the first sliding groove and is connected with the first sliding block (341), one end of the first spring (344) is abutted to the handle (343), the other end of the first spring is abutted to the groove bottom of the first sliding groove, and a fifth opening which is arranged along the sliding direction of the first sliding block (341) and is communicated with the first sliding groove is formed in the connecting shell (31).

4. A novel multifunctional ladder as claimed in any one of claims 1 to 3, wherein: the cross rod (12) comprises a first cross rod (121), a second cross rod (122) and a locking assembly (123), the second cross rod (122) is hollow, one end of the second cross rod (122) is open, and the other end of the second cross rod (122) is connected with any one of the support rods (11) in a sliding mode; one end of the first cross rod (121) extends into the opening at one end of the second cross rod (122) and is in sliding connection with the second cross rod (122), the other end of the first cross rod is in sliding connection with the rest of the support rods (11), and the locking assembly (123) is installed at one end of the first cross rod (121) or the second cross rod (122) to fix the first cross rod and the second cross rod; and the opposite sides of the two support rods (11) are respectively provided with a second sliding groove matched with the first cross rod (121) and the second cross rod (122).

5. The novel multifunctional ladder of claim 4, characterized in that: the clamping lock assembly (123) comprises a housing (1231) matched with the shape of the second cross rod (122), and a sliding plate (1232), a positioning pin (1233) and at least one second spring (1234) which are arranged in the housing (1231), wherein the housing (1231) is arranged in the second cross rod (122) in a sliding mode and is connected with one end of the first cross rod (121); the second spring (1234) is arranged along the axial direction perpendicular to the second cross rod (122) and one end of the second spring (1234) is connected with the inner side wall of the housing (1231), and the sliding plate (1232) is arranged along the axial direction of the second cross rod (122) and one side of the sliding plate abuts against the other end of the second spring (1234); the locating pin (1233) is along the perpendicular to the axial setting of two (122) on the horizontal pole and its one end with the opposite side of slide (1232) is connected, be equipped with a plurality of locating holes (124) along its axial interval on the lateral wall of two (122) on the horizontal pole, the other end of locating pin (1233) passes casing (1231) and with locating hole (124) joint cooperation, be equipped with the confession on casing (1231) the through-hole that locating pin (1233) passed.

6. The novel multifunctional ladder of claim 5, characterized in that: the cross-section of casing (1231) is the rectangle, one side of slide (1232) is equipped with and is used for stirring slide (1232) gliding shifting block (1235), be equipped with on casing (1231) with shifting block (1235) stir the opening two that the orbit matches, be equipped with along its axial on horizontal pole two (122) with shifting block (1235) complex opening three.

7. A novel multifunctional ladder as claimed in any one of claims 1 to 3, wherein: the roller assembly (5) comprises a main rod (51), a universal wheel (52), a connecting rod four (53), a connecting rod five (54) and a positioning piece (55), one end of the main rod (51) is hinged with the support rod (11), the universal wheel (52) is rotatably installed at the other end of the main rod (51), and the positioning piece (55) is installed on the support rod (11) and positions one end of the main rod (51); one end of the connecting rod four (53) is hinged to the support rod (11), one end of the connecting rod five (54) is hinged to the other end of the connecting rod four (53), and the other end of the connecting rod five (54) is hinged to one end, close to the universal wheel (52), of the main rod (51).

8. The novel multifunctional ladder of claim 1, characterized in that: the lifting assembly (42) comprises a second connecting rod (421), a third connecting rod (422), a second sliding block (423) and a sliding block shell (424), two ends of the second connecting rod (421) are hinged to the guard bar (41) and the supporting bar (11) respectively, and one end of the third connecting rod (422) is hinged to the second connecting rod (421); the sliding block shell (424) is mounted on the supporting rod (11), the sliding block II (423) is axially and slidably mounted in the sliding block shell (424) along the supporting rod (11), and a limiting groove used for limiting the sliding block II (423) is formed in the position, close to one end, in the sliding block shell (424); one side of the second sliding block (423) is hinged with the other end of the third connecting rod (422), and the side wall of the sliding block shell (424) is provided with a fourth opening with the same track as the second sliding block (423).

9. A novel multifunctional ladder as claimed in any one of claims 1 to 3, wherein: base (2) include two knee (21), the one end of knee (21) is passed through respectively connect mounting (3) and be located arbitrary two of landing leg (1) bottom the one end of branch (11) is articulated, arbitrary one the other end cavity of knee (21) is uncovered, and its slip cover is established the surplus on the other end of knee (21).