CN203213949U - Locking mechanism of expandable ladder with bamboo joints - Google Patents
Locking mechanism of expandable ladder with bamboo joints Download PDFInfo
- Publication number
- CN203213949U CN203213949U CN2013202349253U CN201320234925U CN203213949U CN 203213949 U CN203213949 U CN 203213949U CN 2013202349253 U CN2013202349253 U CN 2013202349253U CN 201320234925 U CN201320234925 U CN 201320234925U CN 203213949 U CN203213949 U CN 203213949U
- Authority
- CN
- China
- Prior art keywords
- locking mechanism
- control pin
- pin
- controll block
- ladder
- Prior art date
- 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.)
- Withdrawn - After Issue
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Classifications
-
- 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
- E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other
Abstract
The utility model discloses a locking mechanism of an expandable ladder with bamboo joints. The locking mechanism comprises a shell. A convex step which extends peripherally is arranged at a junction of a conical surface and the circumferential surface of the shell, and convex fastening columns which extend radially are arranged on two upper sides of the convex step; a trigger rod is arranged at the bottom of the shell, and a slotted hole is formed in a rod body of the trigger rod; a radial expandable control pin is embedded in a first accommodating cavity of the shell, an axial expandable control block is embedded in a second accommodating cavity of the shell, and a surface of the control bock can work in two states that the surface of the control block is abutted to the tail end of the control pin or is separated from the tail end of the control pin; the direction of the slotted hole is consistent with the expansion direction of the control pin. The locking mechanism has the advantages that the locking mechanism is used as a constituent element of the expandable ladder with the bamboo joints, so that two functions of the ladder with the bamboo joints can be realized, in other words, the ladder can only be downwardly contracted from a high position step by step in an expansion state or can only be stretched from bottom to top step by step in a contraction state, and the purpose of eliminating potential safety hazards of the existing ladder with the bamboo joints in a service procedure is achieved.
Description
[technical field]
The utility model relates to a kind of telescopic ring ladder, especially belongs to a kind of locking mechanism for telescopic ring ladder and similar item use thereof.
[background technology]
At present, telescopic ring ladder is with advantages such as its use, collection and convenient transportations, and favored by consumers in general, uses extensive day by day.Its structure generally includes two left side ladder pipes that are oppositely arranged and right ladder pipe, and many be arranged on the crosspiece between the terraced pipe (being commonly called as step plate) about this, described left and right ladder pipe is formed similar telescopic fishing rod structure respectively by many up-thin-low-thick pipe joints fit successively.Every crosspiece is placed on the port of corresponding left and right pipe joint.For realizing stretching, be the both sides of square crosspiece inner chamber at cross section, establish a latch respectively towards the pipe joint direction, flexible by the cinclides that external feather key is controlled on the relative pipe joint wall of this latch, reach and close, divide purpose at the corresponding levels and the upper level pipe joint.Before the utility model is made, the telescopic ring ladder of existing public technology in actual use, there is following problems: owing to can select pipe joint to realize stretching or contractile function arbitrarily, therefore, 1, when the extended state operating personnel is positioned at eminence, if below personnel operation feather key will cause the subordinate pipe joint to shrink and jeopardize the top personal security.2, under contraction state, when the user selects higher level's pipe joint to stretch, if still have part subordinate pipe joint to be in contraction state, the stacked and phenomenon that causes the crosspiece spacing to differ of subordinate's crosspiece will appear in working depth, therefore, there is potential safety hazard in the user in the cat ladder process.
[summary of the invention]
For solving the problems of the technologies described above, the utility model aims to provide a kind of telescopic ring ladder locking mechanism, this locking mechanism is installed on the lower port of stretchable pipe joint, insert in the next stage pipe joint together with this grade pipe joint, thereby make the ring ladder of making that following characteristics be arranged, that is: under extended state, can only shrink pipe joint from top to bottom step by step; Under contraction state, the pipe joint that can only stretch step by step from bottom to top, thereby the purpose that realization eliminates safe hidden trouble.
For solving the problems of the technologies described above, the utility model has adopted following technical proposals, this telescopic ring ladder locking mechanism is characterized in that: comprise that the approximate gyro inside of a profile has the housing of die cavity, this housing forms the boss rank that circumferentially extend on an edge at the conical surface and outer circumference surface intersection; On two side positions of outer circumference surface above the described boss rank, be provided with the protruding button column that extends radially out this outer circumference surface, the protruding distance on the evagination length of this protruding button column and described boss rank is complementary; The frizzen axial restraint that has mounting hole on shaft is arranged on the bottom of described housing; The die cavity of described housing is two, and first containing cavity is embedded with the control pin assemblies respectively to open-topped containing cavity, and second containing cavity is embedded with the controll block assembly; Described control pin assemblies comprises a telescopic control pin that radially arranges; Described controll block assembly comprises a telescopic controll block that axially arranges, and a face of this controll block and the tail end of described control pin have offseting or break away from two kinds of duties; Described mounting hole towards consistent with the flexible direction of described control pin, be provided with locating piece at the outer circumference surface of described housing.
During as preferred concrete enforcement, described control pin assemblies also comprises a pin spring, and this pin spring housing is located on one's body the pin of described control pin, and on one's body one of an end of described pin spring and described pin sells bulge loop and offsets.
During as preferred concrete enforcement, described controll block downside has a spring base, and an axle spring that is positioned at described second containing cavity below is set on this spring base; Be provided with a projection in described controll block towards the downside of a face of described control pin.
During as preferred concrete enforcement, extend continuously along whole outer circumference surface on described boss rank.
During as preferred concrete enforcement, the upside of the outer face of described protruding button column is an inclined-plane that extends from inside to outside.
During as preferred concrete enforcement, described housing, and described first containing cavity, second containing cavity and frizzen are the integral molded plastic member.
Beneficial effect: compared with prior art, the problem that the utility model need solve at prior art and designing.During use, it is installed in the lower end of two telescopic each pipe joints of ladder pipe, be under the extended state at the ring ladder, all controll block is pinned the control pin, and it can not interiorly be contracted, has only fluid pressure controlling block under higher level's frizzen, make controll block allow out position for after the frizzen mounting hole is gone in indentation in the control pin afterbody, could shrink step by step from top to bottom, vice versa, can only stretch step by step from the bottom up, thereby realize the purpose that eliminates safe hidden trouble.
By an embodiment, the utility model is described in further detail below in conjunction with accompanying drawing.
[description of drawings]
Fig. 1 is the assembling perspective view of an embodiment of the utility model.
The side-looking structural representation that Fig. 2 is later for Fig. 1 assembles.
Fig. 3 is the assembly structure key diagram of this mechanism and pipe joint.
Fig. 4 is this mechanical work principle description architecture figure.
Fig. 5 is applied in structure key diagram on the ring ladder for this mechanism.
Fig. 6 is A-A sectional structure schematic diagram among Fig. 5.
Fig. 7 is B-B cross-sectional view among Fig. 6.
Among the figure: housing 10, the first containing cavities 101, hypocone 102, boss rank 1021, bulge loop wall 1022, locating piece 1023, pin-and-hole 103, protruding button column 104, inclined-plane 1041, post hole 105, reinforcing rib 106.Control pin 20.Pin body 201, pin bulge loop 2011, pin 2012, pin spring 202.Controll block 30, controll block roof 301, projection 3011, wall groove 3011a, carry on the back protruding 302, spring base 303, axle spring 304, the second containing cavities 305.Trigger piece 40, mounting hole 401.Pipe joint 50, button hole 501, inwall 502, diapire 503, recess 504, one-level pipe joint 505,506, three grades of pipe joints 507 of secondary pipe joint, top pipe joint 5015, one-level crosspiece 60, secondary crosspiece 601, fixed cover 601a, feather key 601b, latch 601c, top crosspiece 6011, anti-fixture block 70, slipmat 701.
[specific embodiment]
Referring to Fig. 1, Fig. 2.Observe from lower to upper, frizzen 40, housing 10 and protruding button column 104 thereof, first containing cavity 101, second containing cavity 305 etc. are the integral molded plastic profiled member, but frizzen 40 is metal material, and first containing cavity 101 and second containing cavity 305 are formed by many reinforcing ribs 106.First containing cavity 101 and second containing cavity 305 are adjacent at interval by reinforcing rib 106, and have a radial direction through hole on the reinforcing rib 106.
In first containing cavity 101 the control pin assemblies is set radially.The pin of control pin 20 2012 can be round end face or taper seat towards the shape of pin-and-hole 103(pin 2012), pin spring 202 is enclosed within on the pin body 201, and outer end and the pin bulge loop 2011 of pin spring 202 offset.Pin bulge loop 2011 can be jump ring or be formed by pin body 201 self evagination that its effect is to guarantee that control pin 20 is not ejected under pin spring 202 acts on.The other end of pin spring 202 and the face of reinforcing rib 106 offset, and the radial direction through hole that the tail end of control pin 20 then extends through on the reinforcing rib 106 enters in second containing cavity 305.
Second containing cavity 305 is axial opening vallecular cavities, in order to axially be embedded the controll block assembly.Axle spring 304 is through the bottom of spring base 303 link control modules 30, and its free end and this vallecular cavity bottom offset.Controll block 30 is the plane with the opposite face of control pin 20 breech faces, and the downside on this plane is provided with projection 3011.The effect of this projection 3011: the one, the lifting guide effect, make controll block 30 under projection 3011 guiding, wall groove 3011a lifting along reinforcing rib 106, the 2nd, cooperate with the tail end of control pin 20, namely the face of compressing of control pin 20 tail ends and controll block 30 is positioned at the top of this projection 3011, prevents that axle spring 304 from ejecting controll block 30 outside the vallecular cavity.It is protruding 302 that the reverse side of controll block 30 is established four back ofs the body, and its vertical wall of reinforcing rib with second containing cavity, 305 rear portions is cooperated, with the purpose of realization minimizing controll block 30 lifting frictional force.
Referring to Fig. 3, and with reference to figure 1 and Fig. 2.The locking mechanism of present embodiment is sleeved on the lower port of every grade of pipe joint 50, but subordinate pipe joint does not need to install.During installation, pipe joint 50 is inserted on the outer circumference surface of this mechanism shell 10, diapire 503 and the boss rank 1021 of pipe joint 50 offset.Locating piece 1023 snaps in the recess 504, with circumferential fixedly pipe joint 50 and convenient.The protruding button column 104 of on the housing 10 two is complementary with two button holes 501 on the pipe joint 50, and protruding button column 104 end face upsides are inclined-plane 1041, so that pipe joint 50 is installed.After the installation, pin-and-hole 103 is just in time consistent with the flexible direction of control pin 20.
Fig. 4 is the operating principle key diagram, and this figure two-stage pipe joint that schematically drawn is in the structure of released state, i.e. the secondary pipe joint of explanation this moment is under the extended state.When needing to shrink, the housing of last pipe joint bottom is descending, and the diapire of frizzen 40 at first offsets with controll block roof 301, and controll block 30 is fallen in second containing cavity 305.When mounting hole 401 positions on the frizzen 40 are corresponding with control pin 20 tail ends, control pin 20 is expandable, make pin head 2012 pushed and interior contracting by the radial component of subordinate's pipe joint inwall, therefore, the pipe joint of this grade is in contractile state (or claiming released state), that is: this moment, latch can play a role by the feather key on the operation crosspiece.
Otherwise, when need stretching, have only earlier will next stage pipe joint stretch after, frizzen 40 is removed controll block 30 is compressed power, horizontal reset on the controll block 30 blocks contracting passage in the control pin 20, control pin 20 is in the lock state, and realizes stretching step by step purpose from bottom to top.
Referring to Fig. 5, and in conjunction with Fig. 6 and Fig. 7.Two parallel ladder pipes are made up of 11 pipe joints respectively, and the caliber of every pipe joint dwindles from bottom to up gradually.Do not establish this locking mechanism except one-level pipe joint 505, the lower end of all the other every grade pipe joint all arranges this locking mechanism.All crosspieces all are arranged on the upper port of every pipe joint.With the example that is set to of secondary crosspiece 601, through the fastening upper port that is positioned at secondary pipe joint 506 of fixed cover 601a, feather key 601b control latch 601c is flexible, is provided with the corresponding through hole with this latch 601c at the tube wall of secondary pipe joint 506 and three grades of pipe joints 507.Moreover, 102 of the hypocones of locking mechanism arrange for latch 601c specially, this hypocone 102 can make pipe joint when shrinking, utilize it to compress the horizontal component that latch 601c produces and make contracting in the latch 601c, when the through hole on three grades of pipe joint 507 walls overlaps with the through hole of secondary pipe joint 506, latch 601c ejects again, and this double section tube pin is closed.
Present embodiment only is explanation invention thinking of the present utility model, and any simple deformation design of making according to present embodiment all should be included protection domain of the present utility model in.
Claims (6)
1. telescopic ring ladder locking mechanism, it is characterized in that: comprise that the approximate gyro inside of a profile has the housing (10) of die cavity, this housing (10) forms the circumferentially boss rank (1021) of extension, an edge at the conical surface and outer circumference surface intersection; On two side positions of top, described boss rank (1021) outer circumference surface, be provided with the protruding button column (104) that extends radially out this outer circumference surface, the protruding distance on the evagination length of this protruding button column (104) and described boss rank (1021) is complementary; Frizzen (40) axial restraint that has mounting hole (401) on shaft is arranged on the bottom of described housing (10); The die cavity of described housing (10) is two, and first containing cavity (101) is embedded with the control pin assemblies respectively to open-topped containing cavity, and second containing cavity (305) is embedded with the controll block assembly; Described control pin assemblies comprises a telescopic control pin (20) that radially arranges; Described controll block assembly comprises a telescopic controll block (30) that axially arranges, and face of this controll block (30) and the tail end of described control pin (20) have offseting or break away from two kinds of duties; Described mounting hole (401) towards consistent with the flexible direction of described control pin (20), be provided with locating piece (1023) at the outer circumference surface of described housing (10).
2. locking mechanism as claimed in claim 1, it is characterized in that: described control pin assemblies also comprises a pin spring (202), this pin spring (202) is set on the pin body (201) of described control pin (20), and the pin bulge loop (2011) on an end of described pin spring (202) and the described pin body (201) offsets.
3. locking mechanism as claimed in claim 1, it is characterized in that: described controll block (30) downside has a spring base (303), and an axle spring (304) that is positioned at described second containing cavity (305) below is set on this spring base (303); Be provided with a projection (3011) in described controll block (30) towards the downside of a face of described control pin (20).
4. locking mechanism as claimed in claim 1, it is characterized in that: extend continuously along whole outer circumference surface on described boss rank (1021).
5. locking mechanism as claimed in claim 1 is characterized in that: the upside of the outer face of described protruding button column (104) is an inclined-plane (1041) that extends from inside to outside.
6. locking mechanism as claimed in claim 1 is characterized in that: described housing (10), and described first containing cavity (101), second containing cavity (305) and frizzen (40) they are the integral molded plastic member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202349253U CN203213949U (en) | 2013-05-03 | 2013-05-03 | Locking mechanism of expandable ladder with bamboo joints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202349253U CN203213949U (en) | 2013-05-03 | 2013-05-03 | Locking mechanism of expandable ladder with bamboo joints |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203213949U true CN203213949U (en) | 2013-09-25 |
Family
ID=49203496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202349253U Withdrawn - After Issue CN203213949U (en) | 2013-05-03 | 2013-05-03 | Locking mechanism of expandable ladder with bamboo joints |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203213949U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277034A (en) * | 2013-05-06 | 2013-09-04 | 浙江迈尔工具有限公司 | Telescopic bamboo joint ladder |
| CN103291205A (en) * | 2013-05-03 | 2013-09-11 | 浙江迈尔工具有限公司 | Telescopic bamboo joint ladder locking mechanism |
-
2013
- 2013-05-03 CN CN2013202349253U patent/CN203213949U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291205A (en) * | 2013-05-03 | 2013-09-11 | 浙江迈尔工具有限公司 | Telescopic bamboo joint ladder locking mechanism |
| CN103277034A (en) * | 2013-05-06 | 2013-09-04 | 浙江迈尔工具有限公司 | Telescopic bamboo joint ladder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130925 Effective date of abandoning: 20150624 |
|
| RGAV | Abandon patent right to avoid regrant |