CN203271558U - Telescopic bamboo joint ladder - Google Patents

Abstract

The utility model discloses a telescopic bamboo joint ladder. The telescopic bamboo joint ladder comprises a left ladder pipe, a right ladder pipe and multiple crosspieces, wherein the ladder pipes are formed by multiple sleeved joint pipes, and the two sides of an inner cavity of each crosspiece are provided with plugs. he telescopic bamboo joint ladder is characterized by comprising a lock mechanism arranged on the lower end port of each joint pipe, wherein each lock mechanism is provided with a shell which forms a raised step on the junction of a conical surface and an outer periphery, and the two sides above each raised step are provided with a radial extended raised buckle pillar; a triggering rod, a rod body of which is provided with a waist-shaped hole, is arranged on the bottom of each shell; a radial telescopic control pin is embedded into a first containing cavity of each shell, an axial telescopic control block is embedded into a second containing cavity of each shell, and one surface of each control block and the tail end of the corresponding control pin can be in a working state of propping or separating; the orientation of each waist-shaped hole and the flexible direction of the corresponding control pin are the same. The telescopic bamboo joint ladder provided by the utility model has the advantage of eliminating potential safety hazards as only shrinking step by step from top to bottom or stretching step by step from bottom to top.

Description

A kind of telescopic ring ladder

[technical field]

The utility model relates to a kind of telescopic ring ladder.

[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 increasingly extensive.Its structure generally includes two left ladder pipes that are oppositely arranged and right ladder pipe, and a plurality of crosspieces (being commonly called as step plate) that are arranged between the terraced pipe in this left and right, described left and right ladder pipe is formed by many up-thin-low-thick pipe joints fit successively respectively, similar telescopic fishing rod structure, 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 respectively a latch towards the pipe joint direction, the cinclides of controlling the relative pipe joint of this latch by external feather key is flexible, reach close, the purpose of minute this secondary pipe joint.Before the utility model is made, the telescopic ring ladder of existing public technology in actual use, there is following problems: can select arbitrarily higher level or subordinate's pipe joint in left and right terraced pipe, realize part pipe joint elevating function, therefore, 1, when the extended configuration operating personnel are positioned at eminence, if below personnel operation feather key will cause the subordinate pipe joint to shrink and jeopardizes 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 cat ladder.

[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, and this ladder has the following advantages: under extended state, can only shrink step by step pipe joint from top to bottom; 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, and the structure of this telescopic ring ladder comprises two left ladder pipes that are oppositely arranged and right ladder pipe, the many crosspieces that are arranged between the terraced pipe in this left and right; Described left and right ladder pipe is formed by many up-thin-low-thick pipe joint fits respectively; The fixed cover of described every crosspiece through its two ends is positioned on the mouth of pipe of corresponding pipe joint upper end, the inner chamber both sides of this crosspiece are respectively equipped with a latch that can divide, close secondary pipe joint tube wall, it is characterized in that: be provided with a locking mechanism on all telescopic pipe joint lower port, this locking mechanism comprises that the approximate gyro of profile inside has the housing of die cavity, and this housing forms the circumferentially boss rank of extension, an edge at the conical surface and outer circumference surface intersection; On two side positions of outer circumference surface, be provided with the protruding button column that extends radially out this outer circumference surface above described boss rank, 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 the first accommodating cavity is embedded with the control pin assemblies respectively to open-topped accommodating cavity, and the second accommodating 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 on 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 at it the pin of described control pin, and with it 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 below described the second accommodating cavity 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 the first accommodating cavity, the second accommodating cavity and frizzen are the integral molded plastic member.

Beneficial effect: compared with prior art, the problem that the utility model need to solve for prior art and designing.During use, locking mechanism is arranged on the lower port of two telescopic each pipe joints of ladder pipe, thereby make this telescopic ring ladder that following two functions arranged: 1, under extended configuration, all controll block is pinned and is controlled pin, it can not be inside contracted, only has fluid pressure controlling block under higher level's frizzen, make controll block allow out position for control the pin afterbody inside contract enter the frizzen mounting hole after, could shrink step by step from top to bottom, 2, vice versa, can only stretch step by step from bottom to top, thereby realize the purpose that eliminates safe hidden trouble.

By embodiment, the utility model is described in further detail below in conjunction with accompanying drawing.

[description of drawings]

Fig. 1 is the assembly structure schematic diagram of locking mechanism described in embodiment of the utility model.

Fig. 2 is that Fig. 1 assembles later side perspective structural representation.

Fig. 3 is the assembly structure key diagram of Fig. 1 middle shell and higher level's pipe joint.In this figure, pipe joint has been carried out broken section.

Fig. 4 is the operating principle description architecture figure that two locking mechanisms match.

Fig. 5 is main TV structure schematic diagram of the present utility model.

Fig. 6 is A-A sectional structure schematic diagram in Fig. 5.

Fig. 7 is B-B cross-sectional view in Fig. 6.

In figure: housing 10, accommodating cavity 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, plunger 2012, pin spring 202.Controll block 30, controll block roof 301, projection 3011, carry on the back protruding 302, spring base 303, axle spring 304, the second accommodating cavities 305.Triggering block 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, the frizzen 40 of this locking mechanism, protruding button column 104, housing 10 and built-in the first accommodating cavity 101 thereof, second accommodating cavity 305 etc. are the integral molded plastic profiled member, wherein frizzen 40 is metal material, and the first accommodating cavity 101 and the second accommodating cavity 305 are formed by many reinforcing ribs 106.The first accommodating cavity 101 and the second accommodating cavity 305 are adjacent by reinforcing rib 106 intervals, and have a radial direction through hole on reinforcing rib 106.

In the first accommodating cavity 101, the control pin assemblies is set radially.The plunger 2012 of controlling pin 20 can be round end face or taper seat towards the shape of pin-and-hole 103(plunger 2012), pin spring 202 is enclosed within on pin body 201, and outer end and the pin bulge loop 2011 of pin spring 202 offset.Sell bulge loop 2011 and can be jump ring or self be formed by pin body 201, its effect be guaranteed to control pin 20 and is not ejected under 202 effects of pin spring.The other end and the reinforcing rib 106 of pin spring 202 offset, and the radial direction through hole that the tail end of control pin 20 extends through on reinforcing rib 106 enters in the second accommodating cavity 305.

The second accommodating cavity 305 is axial opening vallecular cavities, in order to axially be embedded the controll block assembly.Axle spring 304 is connected with controll block 30 through spring base 303, and its free end and bottom, this chamber offset.Controll block 30 is the plane with the opposite face of controlling pin 20, and the downside on this plane is provided with projection 3011.This projection 3,011 one is the lifting guide effect, controll block 30 can be slided in the groove of reinforcing rib 106, the 2nd, coordinate with the tail end of controlling pin 20, the face that compresses of namely controlling 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 chamber.It is protruding 302 that the reverse side of controll block 30 is established four back ofs the body, its vertical wall of reinforcing rib with the second accommodating cavity 305 rear portions coordinated, 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.Locking mechanism 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, the diapire of pipe joint 50 503 offsets with boss rank 1021.Locating piece 1023 snaps in recess 504, with circumferential fixedly pipe joint 50 and convenient.The protruding button column 104 of on housing 10 two is complementary with two button holes 501 on pipe joint 50, and protruding button column 104 end face upsides are inclined-plane 1041, so that pipe joint 50 is installed.After installation, pin-and-hole 103 is just in time consistent with the flexible direction of controlling pin 20.

Referring to Fig. 4.This figure has schematically drawn the structure that the two-stage pipe joint is in released state, i.e. the secondary pipe joint of explanation this moment is under extended configuration.When need shrinking, the housing of upper pipe joint bottom is descending, and at first the diapire of frizzen 40 offsets with controll block roof 301, and controll block 30 is fallen in the second accommodating cavity 305.When mounting hole 401 positions on frizzen 40 with control pin 20 tail ends when corresponding, controlling pin 20 is expandable, make plunger 2012 be subjected to the radial component extruding of subordinate's pipe joint inwall and inside contract, 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, only have first will next stage pipe joint stretch after, frizzen 40 is removed controll block 30 is compressed power, horizontal reset on controll block 30 blocks control pin 20 and inside contracts passage, 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 that are oppositely arranged are comprised 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, it is flexible that feather key 601b controls latch 601c, is provided with the corresponding through hole with this latch 601c on 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, utilizing it to compress the horizontal component that latch 601c produces inside contracts 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.

The present embodiment only is explanation invention thinking of the present utility model, and any simple deformation design of making according to embodiment all should be included protection domain of the present utility model in.

Claims (6)

1. a telescopic ring ladder, comprise two left ladder pipes that are oppositely arranged and right ladder pipe, the many crosspieces (60,601,6011) that are arranged between the terraced pipe in this left and right, described left and right ladder pipe is formed by many up-thin-low-thick pipe joint fits respectively, described every crosspiece (60, 601, 6011) fixed cover (601a) through its two ends is positioned on the mouth of pipe of corresponding pipe joint upper end, this crosspiece (60, 601, 6011) inner chamber both sides are respectively equipped with one and can divide, close the latch (601c) of secondary pipe joint tube wall, it is characterized in that: at all telescopic pipe joints (505, 506, 507, 5015) lower port is provided with a locking mechanism, this locking mechanism comprises a housing (10) with die cavity, this housing (10) forms at the conical surface and outer circumference surface intersection the boss rank (1021) that circumferentially extend on an edge, 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 the first accommodating cavity (101) is embedded with the control pin assemblies respectively to open-topped accommodating cavity, and the second accommodating 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) on the outer circumference surface of described housing (10).

2. a kind of telescopic ring as claimed in claim 1 is terraced, 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 described pin body (201) offsets.

3. a kind of telescopic ring as claimed in claim 1 is terraced, it is characterized in that: described controll block (30) downside has a spring base (303), and an axle spring (304) that is positioned at below described the second accommodating cavity (305) 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. a kind of telescopic ring as claimed in claim 1 is terraced, and it is characterized in that: extend continuously along whole outer circumference surface on described boss rank (1021).

5. a kind of telescopic ring as claimed in claim 1 is terraced, it 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. a kind of telescopic ring as claimed in claim 1 is terraced, it is characterized in that: described housing (10), and described the first accommodating cavity (101), the second accommodating cavity (305) and frizzen (40) they are the integral molded plastic member.

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