CN108150086B - Ladder - Google Patents
Ladder Download PDFInfo
- Publication number
- CN108150086B CN108150086B CN201810088225.5A CN201810088225A CN108150086B CN 108150086 B CN108150086 B CN 108150086B CN 201810088225 A CN201810088225 A CN 201810088225A CN 108150086 B CN108150086 B CN 108150086B
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- China
- Prior art keywords
- ladder
- connecting block
- head end
- pin shaft
- end connecting
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
- E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
- E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/397—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders characterised by having wheels, rollers, or runners
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/02—Extending means
- E06C7/04—Hand-operated extending means carried by the ladder
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/06—Securing devices or hooks for parts of extensible ladders
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/42—Ladder feet; Supports therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The invention relates to a ladder, which comprises one or two parallelogram connecting rod assemblies, wherein the tops of the parallelogram connecting rod assemblies are connected together, ladder bars are respectively connected to pin shafts at the two horizontal ends of each parallelogram connecting rod assembly, vertical threads with opposite turning directions are arranged on two corresponding adjacent ladder bars of each parallelogram connecting rod assembly, vertical screw rods are screwed on the vertical threads, the pin shafts at the two horizontal ends of each parallelogram connecting rod are respectively called a first pin shaft and a second pin shaft, one end of each ladder bar is hinged with the first pin shaft, and a ladder bar guide sleeve which is in guide sliding fit with the other end of the corresponding ladder bar is arranged on the second pin shaft. The invention solves the problem that the ladder rod is easy to move horizontally in the ladder climbing process of the operators in the prior art.
Description
Technical Field
The invention relates to a ladder.
Background
The ladder is a necessary product in daily life, Chinese patent CN105927138B discloses a 'telescopic ladder', which comprises a set of parallelogram connecting rod assemblies which are vertically arranged, pin shafts at the horizontal two ends of each parallelogram connecting rod assembly are lengthened forwards, ladder rods with square cross sections are sleeved on the lengthened parts, and a section of through sliding groove is symmetrically formed at the left end and the right end of each ladder rod. Vertical screw holes with opposite spiral directions are processed in the middle of the upper ladder rod and the lower ladder rod, vertical screw holes are connected with vertical screw rods matched with the vertical screw holes in an internal thread mode, and hand wheels are mounted in the middle of the vertical screw rods. Other unexpected ladder poles of this group ladder pole all process vertical perforation in the middle part so that hold vertical lead screw when the ladder is retrieved.
When the telescopic ladder is used, due to the fact that the screwing directions of the two vertical screw holes are opposite, the hand wheel can be rotated to enable the upper ladder rod and the lower ladder rod to be far away or close to simultaneously, the structural characteristics of the parallelogram connecting rod assembly can enable the motion to be synchronous and copied on the connecting rod assemblies, the telescopic changing process is also a left-right sliding process of the pin shaft in the sliding groove, the height of the whole ladder can be simultaneously lengthened or shortened in an accelerating manner in an equal time, and therefore the ladder can be in a lengthened use state and a shortened recovery state. However, the existing telescopic ladder has the following problems: 1. the extension ladder only has one parallelogram connecting rod assembly, and when the extension ladder is used, the extension ladder must be placed against a wall, so that certain limitation is imposed on the use environment, and the extension ladder cannot be used if no wall or other leaning and standing positions exist in the use environment; 2. during the using process, namely the process that a person climbs upwards along the ladder bars, the positions of the ladder bars are not fixed, and the ladder bars have freedom in the horizontal direction, so that the danger in the ladder climbing process is increased; 3. the whole ladder can be moved only by carrying the whole ladder, and the movement is not very convenient.
Disclosure of Invention
The invention aims to provide a ladder, which solves the problem that a ladder rod is easy to move horizontally in the ladder climbing process of an operator in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides a ladder, including one or two parallel four deformation link assembly that the top links together, the epaxial ladder pole that all is connected with is sold at the horizontal both ends of each parallelogram link assembly, be provided with the vertical screw that revolves to opposite on two adjacent ladder poles that correspond of each parallelogram link assembly, vertical lead screw is equipped with in vertical screw top spin, the horizontal both ends round pin axle of each parallelogram link assembly is called first round pin axle and second round pin axle respectively, the one end and the first round pin of ladder pole articulate and link to each other, the epaxial ladder pole uide bushing that is used for with the other one end direction sliding fit who corresponds the ladder pole that is provided with of second round pin.
The end part of one end of the ladder bar close to the second pin shaft is provided with a blocking edge which is used for blocking and matching with the ladder bar guide sleeve so as to limit the movement limit of the ladder bar towards the direction of the first pin shaft.
The ladder includes that two tops link together through the top parallelogram link assembly, the epaxial ladder pole that all is connected with of horizontal both ends round pin of each parallelogram link assembly, be provided with on two adjacent ladder poles of correspondence of each parallelogram link assembly and revolve to opposite vertical screw, vertical lead screw is equipped with in vertical screw top spin, be provided with the hand wheel on one of them vertical lead screw, all be provided with the drive wheel on two vertical lead screws, telescopic ladder still includes synchronous transmission and connects the drive belt between two drive wheels, the drive belt is the endless drive belt that the head and the tail end formed through removable connection structure connection.
The heights of the two driving wheels are consistent.
The detachable connection structure is a plug-in type detachable connection structure which is plugged along the width direction of the transmission belt.
Plug-in type releasable connection structure is including setting up in the head end connecting block of drive belt head end and setting up in the trailing end connecting block of drive belt tail end, the width behind head end connecting block and the complementary connection of trailing end connecting block with the bandwidth of drive belt is unanimous, is provided with head end connecting block bolt and head end connecting block jack on the head end connecting block, is provided with on the trailing end connecting block to be used for with head end connecting block bolt, head end connecting block jack to tail end connecting block bolt of inserting.
The invention has the beneficial effects that: when the ladder is used, the height of the ladder can be adjusted by rotating the vertical lead screw to stretch the parallelogram connecting rod assembly, one end of the ladder rod is connected with the first pin shaft to move horizontally in the stretching process of the parallelogram connecting rod assembly, the other end of the ladder rod is in guide sliding fit with the ladder rod guide sleeve on the second pin shaft, the ladder rod guide sleeve supports the other end of the ladder rod and does not influence the movement adjustment of the ladder rod, after the height adjustment of the ladder is finished, the position of the first pin shaft is fixed, and the horizontal position of the ladder rod connected with the first pin shaft is naturally fixed, so that an operator cannot move horizontally in the ladder climbing process, and the stability of the operator in the ladder climbing process is ensured.
Drawings
FIG. 1 is a schematic view of a telescopic ladder of the present invention;
FIG. 2 is a schematic view of the telescopic ladder of the present invention in a state of adjusting the height;
FIG. 3 is a schematic structural view of a single parallelogram linkage assembly of FIG. 1;
FIG. 4 is a schematic view of the engagement of the drive belt with two vertical screws in the present invention;
FIG. 5 is a schematic view of the structure of FIG. 4 with the belt removed;
FIG. 6 is a schematic structural view of the belt of FIG. 4;
FIG. 7 is a schematic illustration of the belt of FIG. 6 with the detachable connection removed.
Detailed Description
An embodiment of a ladder is shown in figures 1-7: the connecting device comprises a top connecting plate 1, wherein the left side and the right side of the top connecting plate are respectively hinged and connected with a group of vertically arranged parallelogram connecting rod assemblies, the parallelogram connecting rod assembly close to the left side is called a left parallelogram connecting rod assembly 2, and the parallelogram connecting rod assembly close to the right side is called a right parallelogram connecting rod assembly 3. All be connected with terraced pole 5 on the round pin axle of the horizontal both ends of each parallelogram link assembly, the round pin axle of the horizontal both ends of connecting parallelogram link assembly is called first round pin axle 4 and second round pin axle 6 respectively in this embodiment, in order to avoid operating personnel ladder in-process terraced pole unstable problem to appear in this embodiment, terraced pole 5's front end links to each other with first round pin axle 4 is articulated, be provided with terraced pole uide bushing 7 on second round pin axle 6, terraced pole 5's rear end and terraced pole uide bushing 7 direction sliding fit, terraced pole's rear end tip still be provided with be used for with the spacing cooperation of terraced pole uide bushing with the fender edge 8 of restriction terraced pole limit of moving. In this embodiment, the top connecting plate is hinged to the uppermost ladder bar of the left and right parallelogram link assemblies.
Be provided with on two adjacent ladder bars that correspond of each group parallelogram link assembly and revolve to opposite vertical screw 11, vertical lead screw is equipped with in vertical screw 11 top spin, call vertical lead screw on the parallelogram link assembly of a left side in this embodiment for left vertical lead screw 14, call vertical lead screw on the parallelogram link assembly of a right side for right vertical lead screw 9, wherein be provided with hand wheel 15 on the vertical lead screw of a left side, drive wheel 10 has all set firmly on two vertical lead screws, the highly uniform of the drive wheel on two vertical lead screws, flexible ladder still includes synchronous transmission and connects the drive belt 16 between two drive wheels, the drive belt is the profile of tooth hold-in range, the drive belt is the endless drive belt that removable connection structure 17 connection formed for head and tail end. Detachable connection structure is the plug-in type detachable connection structure of pegging graft along drive belt width direction, plug-in type detachable connection structure is including setting up in the head end connecting block 18 of drive belt head end and setting up in the tail end connecting block 21 of drive belt tail end, the width behind head end connecting block 18 and the complementary connection of tail end connecting block 21 is unanimous with the bandwidth of drive belt 16, be provided with head end connecting block bolt 20 and head end connecting block jack 19 on the head end connecting block 18, be provided with on the tail end connecting block 21 and be used for with head end connecting block bolt, tail end connecting block jack 23 and tail end connecting block bolt 22 of. At head end connecting block bolt, head end connecting block jack and trailing end connecting block jack, the trailing end connecting block bolt is to inserting the back, and the drive belt becomes a stable endless drive belt, and when head end connecting block bolt, head end connecting block jack and trailing end connecting block jack, trailing end connecting block bolt after-separating, the head end connecting block and the trailing end connecting block disconnection of drive belt, the drive belt can be pulled down from two drive wheels like this, does not influence telescopic ladder's normal use.
The bottom of each parallelogram link assembly is provided with two universal wheels 12 with brake devices 13, which belong to the prior art and the structure of which is not described in detail here. In order to avoid influencing the normal height-adjusting function of the telescopic ladder, one universal wheel is arranged on the ladder bar at the lowest position, and the other universal wheel is arranged on the ladder bar guide sleeve at the lowest position.
The height of the ladder needs to be adjusted before the ladder is used, as shown in fig. 2, two sets of parallelogram link assemblies are adjusted to be vertical parallel postures, the detachable connection structures of the transmission belt are connected together, the transmission belt is wound on two transmission wheels, one universal wheel is locked, an operator rotates a hand wheel, two vertical lead screws synchronously rotate to drive the two sets of parallelogram link assemblies to synchronously ascend and descend, and if the two sets of parallelogram link assemblies do not synchronously ascend and descend, the two sets of parallelogram link assemblies can be distinguished. After the height adjustment is finished, the transmission belt is detached, the telescopic ladder is arranged to be in a splayed structure as shown in fig. 1, the other universal wheel is locked, the telescopic ladder can be used as a normal ladder, when the telescopic ladder needs to be moved, the two universal wheels at the bottom of each group of parallelograms are loosened, and the telescopic ladder can be conveniently moved to any position.
In other embodiments of the invention: the detachable connection structure may not be a plug-in detachable connection structure, for example, the detachable connection structure is a bolt detachable connection structure; the toothed belt can be replaced by other transmission belts such as a trapezoidal belt and a transmission chain belt; the left parallelogram connecting rod assembly and the right parallelogram connecting rod assembly can be asynchronously lifted and adjusted, a driving wheel and a driving belt are not needed, and the left parallelogram connecting rod assembly and the right parallelogram connecting rod assembly can be turned upside down to be in a horizontal posture when the left parallelogram connecting rod assembly and the right parallelogram connecting rod assembly are subjected to height adjustment, and then the height adjustment is carried out; the ladder can be formed by only one parallelogram connecting rod assembly, and the ladder needs to be used on a wall; the top connecting plate can be omitted; the top connecting plate can also be omitted, and the uppermost ladder bars of the left and right parallelogram connecting rod assemblies are directly hinged and connected together.
Claims (5)
1. A ladder, characterized by: the ladder is a ladder stand and comprises a top connecting plate, the left side and the right side of the top connecting plate are respectively hinged and connected with a group of vertically arranged parallelogram connecting rod assemblies, the pin shafts at the two horizontal ends of each parallelogram connecting rod assembly are respectively connected with a ladder rod, vertical threads with opposite turning directions are arranged on two corresponding adjacent ladder rods of each parallelogram connecting rod assembly, a vertical screw rod is screwed on the vertical thread, pin shafts at two horizontal ends of each parallelogram connecting rod are respectively called a first pin shaft and a second pin shaft, one end of each ladder rod is hinged with the first pin shaft, a ladder rod guide sleeve which is used for being in guide sliding fit with the other end of the corresponding ladder rod is arranged on the second pin shaft, a hand wheel is arranged on one of the vertical screw rods, the two vertical screw rods are provided with driving wheels, the telescopic ladder further comprises a driving belt which is connected between the two driving wheels in a synchronous transmission manner, and the driving belt is an annular driving belt which is formed by connecting the head end and the tail end through a detachable connection structure.
2. A ladder as set forth in claim 1 wherein: the end part of one end of the ladder bar close to the second pin shaft is provided with a blocking edge which is used for blocking and matching with the ladder bar guide sleeve so as to limit the movement limit of the ladder bar towards the direction of the first pin shaft.
3. A ladder as set forth in claim 1 wherein: the heights of the two driving wheels are consistent.
4. A ladder as set forth in claim 1 wherein: the detachable connection structure is a plug-in type detachable connection structure which is plugged along the width direction of the transmission belt.
5. A ladder as set forth in claim 4 wherein: plug-in type releasable connection structure is including setting up in the head end connecting block of drive belt head end and setting up in the trailing end connecting block of drive belt tail end, the width behind head end connecting block and the complementary connection of trailing end connecting block with the bandwidth of drive belt is unanimous, is provided with head end connecting block bolt and head end connecting block jack on the head end connecting block, is provided with on the trailing end connecting block to be used for with head end connecting block bolt, head end connecting block jack to tail end connecting block bolt of inserting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810088225.5A CN108150086B (en) | 2018-01-30 | 2018-01-30 | Ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810088225.5A CN108150086B (en) | 2018-01-30 | 2018-01-30 | Ladder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108150086A CN108150086A (en) | 2018-06-12 |
| CN108150086B true CN108150086B (en) | 2020-05-22 |
Family
ID=62459269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810088225.5A Active CN108150086B (en) | 2018-01-30 | 2018-01-30 | Ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108150086B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138820B (en) * | 2018-07-10 | 2021-03-02 | 王金宝 | Multifunctional folding ladder |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US167178A (en) * | 1875-08-31 | Improvement in fire-escapes | ||
| US2567302A (en) * | 1947-08-18 | 1951-09-11 | Sip Karel | Foldable ladder |
| JPS5214602Y2 (en) * | 1972-12-08 | 1977-04-01 | ||
| US20060272893A1 (en) * | 2005-05-26 | 2006-12-07 | Joe Foggio | Therapeutic foot/leg/knee elevation |
| CN105927138B (en) * | 2016-06-18 | 2017-07-28 | 陈烁 | Extension ladder |
-
2018
- 2018-01-30 CN CN201810088225.5A patent/CN108150086B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108150086A (en) | 2018-06-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20191219 Address after: Ganquan road Shushan District of Hefei City, Anhui Province, 230000 West hillock road to the South Wild Garden commercial office building room B-1512 Applicant after: Anhui Eagle Dragon Industrial Design Co., Ltd. Address before: No. 4, Dongming Road, Jinshui District, Zhengzhou, Henan Applicant before: Zhang Fengju |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200428 Address after: 321300 dalongbei, paixilu village, Xiangzhu Town, Yongkang City, Jinhua City, Zhejiang Province Applicant after: Yongkang Dongxu Elevator Co., Ltd Address before: Ganquan road Shushan District of Hefei City, Anhui Province, 230000 West hillock road to the South Wild Garden commercial office building room B-1512 Applicant before: ANHUI YINGLONG INDUSTRIAL DESIGN Co.,Ltd. |
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| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |