CN105463987B - Modularization, big corner, multi-directional deflection retractor device and bridge - Google Patents
Modularization, big corner, multi-directional deflection retractor device and bridge Download PDFInfo
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- CN105463987B CN105463987B CN201511024785.7A CN201511024785A CN105463987B CN 105463987 B CN105463987 B CN 105463987B CN 201511024785 A CN201511024785 A CN 201511024785A CN 105463987 B CN105463987 B CN 105463987B
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- retractor device
- modularization
- board component
- big corner
- broach
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/065—Joints having sliding plates
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention relates to retractor device for building, a kind of modularization, big corner, multi-directional deflection retractor device are provided, including across seam beam and at least one broach board component, include supporting faceplate across seam beam, at least one cambered surface supporting seat board is provided with across seam beam both sides, be provided with least one broach board component across at least side of seam beam, and connected between adjacent two broach board component using rigid body elastic component, across seam beam and and its close to broach board component between be hinged by least one rigidity；A kind of bridge, including above-mentioned retractor device are also provided.Retractor device of the present invention is suitable for influence caused by vertical direction big corner and horizontal direction translation across seam beam, and broach board component can be then eliminated across telescopic variation caused by structural joint direction and perpendicular to the influence across direction level angle, bridge three direction displacement caused by temperature, wind-force, load, flexible and rotation can be met, continuous traffic loading end can be provided for driving, noise reduction, vibration-isolating effect are good.
Description
Technical field
The present invention relates to bridge and other building retractor devices, more particularly to a kind of modularization, big corner, multi-directional deflection to stretch
Compression apparatus and bridge.
Background technology
Retractor device is the key position in bridge member, is played an important role in bridge function is realized.Common bridge
Retractor device has board-like Telescopic rubber device, shaped steel modular expansion device, the board-like retractor device of broach etc..
Bridge is being built and during operation, can sunk by car load, bridge own material shrinkage and creep, basis
Drop, wind load etc. act on, and cause bridge beam end to deform.Bridge structure is sewn on 6 free degree directions and different degrees of space be present
Move (displacements and torsion in tri- directions of XYZ), so as to cause to extrude to the retractor device that is installed on bridge beam end, stretch,
The space operations such as torsion, dislocation, sedimentation.
Shaped steel modular expansion device in existing market, longitudinal extension gap present in it is big, flexible uneven, impact
Power is concentrated, jump car is serious, concrete is frangible, extensible member spoilage is high, manufacturing expense is big, designs phenomena such as reserved groove depth depth
It is more prominent.Particularly to suspension bridge, cable-stayed bridge, and tiltedly, curved bridge, because multidirectional displacement unavoidably be present in bridge structure, because
The defects of inadaptable transverse direction and multi-directional deflection requirement have seriously been exposed during this use.And high is required to vertical deformation, indulge,
The big cable-stayed bridge of lateral deflection, suspension bridge etc., modular expansion device for bridge are then difficult to the requirement for meeting its multi-directional deflection.
And conventional expansion joint of comb plate, it is impossible to meet bridge beam body vertical corner requirement.When beam body is sunk beam-ends in stand under load
Upwarp when corner occurs, the fishback of traditional fishback class retractor device can tilt with beam-ends corner, the rack of tilting and right
Traffic safety brings hidden danger, meanwhile, broach fracture can be produced after vehicle spreading, anchors phenomena such as pulling.And comb plate, comb joint bottom
Rubber slab vehicle by when deform, rubbish intrusion fishback bottom, cause broach to upwarp, the bending of anchor bolt stress,
Ultimately result in single unit system early ageing destruction.Also, the anchor structure of device is installed more in the form of installation bolt is implanted into, use
The middle device anchor structure that is hit easily loosens and causes last anchor structure to pull.
The content of the invention
It is an object of the invention to provide a kind of modularization, big corner, multi-directional deflection retractor device, it is intended to existing for solving
Some retractor devices are easily affected by the external environment the problem of being unfavorable for traffic safety.
What the present invention was realized in：
The embodiment of the present invention provides a kind of modularization, big corner, multi-directional deflection retractor device, including across structural joint across
Stitch beam and at least one broach board component, described include across seam beam can be described across seam across the supporting faceplate of the structural joint
It is described across stitch in Liangqi one end and rotatably at least one arc that the both sides of structural joint described in Liang Yu are provided with supporting respectively
Surface bearing seat board, it is described be disposed with along the direction away from the structural joint across at least side of seam beam it is at least one described
Broach board component, and being connected between the adjacent two broach board component using rigid body elastic component, it is described across seam beam with and its is tight
It is hinged between the adjacent broach board component by least one rigidity.
Further, in addition to pre-buried two piece of first steel plate being embedded in concrete, two first steel plates are distinguished
Positioned at the both sides of the structural joint, each cambered surface supporting seat board and each broach board component are respectively positioned at the institute of respective side
State on the first steel plate.
Further, two first steel plates be respectively provided with extend straight down into the corresponding concrete it is at least one
Anchor bar.
Further, between the adjacent two broach board components, it is described across seam beam with and its close to the broach
Also be respectively connected between board component can horizontal overlapping sliding panel, it is and described between the two neighboring broach board component
Sliding panel is directly over the corresponding rigid body elastic component.
Further, asphalt material or fluid sealant are perfused with the upper surface of each sliding panel, the asphalt material or
The surface of fluid sealant described in person is not higher than the upper surface of the supporting faceplate.
Further, seat board under broach board component is provided with first steel plate with the broach board component, and
Elastic laminated rubber bearing is laid on seat board under the broach board component, also being tiled on the elastic laminated rubber bearing has
The steel plate of stainless steel second, the bottom plate of each broach board component are slideably positioned on second steel plate.
Specifically, each broach board component includes being generally aligned in the same plane interior panel, level with the supporting faceplate
The web of the bottom plate of supporting and the connection panel and the bottom plate, the rigid body bullet is used between the two neighboring web
Property part connection.
Further, also have extend horizontally to the structural joint correspond in the concrete of side at least one anchoring drawing
Plate.
Further, in addition to the waterproof roll across the structural joint, the waterproof roll positioned at described across seam beam
Underface.
The embodiment of the present invention also provides a kind of bridge, including two abutments and at least one beam body, in addition at least one
Individual above-mentioned modularization, big corner, multi-directional deflection retractor device, each modularization, big corner, multi-directional deflection retractor device
Install between the abutment and the adjacent beam body or between the two neighboring beam body, and positioned at the abutment with it is adjacent
Each modularization, big corner between the beam body or between the two neighboring beam body, multi-directional deflection retractor device edge
Direction across bridge is arranged side by side.
Specifically, each modularization of direction across bridge, big corner, the size of multi-directional deflection retractor device be 1m, 1.5m or
2m, and there is 2-5mm gap between adjacent two modularizations, big corner, multi-directional deflection retractor devices.
The invention has the advantages that：
The retractor device of the present invention, by being formed across seam beam and at least one broach board component two large divisions, across seam beam
At least side be provided with the broach board component, and be hinged between the two using rigidity, seat board branch supported by cambered surface across seam beam
Hold, so that be adapted to influence caused by vertical direction big corner and horizontal direction translation across seam beam, and fishback group
Part can be then eliminated across telescopic variation caused by structural joint direction and perpendicular to across direction level angle with rigid body elastic component
Influence.When retractor device is applied on bridge, bridge three-dimensional position caused by temperature, wind-force, load is adapted to
Move, flexible and rotation, continuous traffic loading end can be provided for driving, driving smooth-going, noise reduction, vibration-isolating effect are good, have simultaneously
Good water resistance and excretory system, anti seismic efficiency is good, and this retractor device service life is grown, and can greatly improve driving peace
Full property and comfortableness.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is modularization provided in an embodiment of the present invention, big corner, the structural representation of multi-directional deflection retractor device；
Fig. 2 is Fig. 1 modularization, big corner, the broach board component of multi-directional deflection retractor device and the structure that is fixedly connected
Schematic diagram；
Fig. 3 is Fig. 1 modularization, the structural representation across seam beam direction across bridge of big corner, multi-directional deflection retractor device；
The modularization, big corner, the top view of multi-directional deflection retractor device that Fig. 4 is Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Referring to Fig. 1-Fig. 3, the embodiment of the present invention provides a kind of modularization, big corner, multi-directional deflection retractor device, including can
Across structural joint across seam beam 11 and at least one broach board component 12, specially include supporting faceplate 111 across seam beam 11, prop up
Bearing surface plate 111 is horizontally disposed and across structural joint, and its upper surface is that plane is available for vehicle to travel, across seam beam 11 in the two of structural joint
Side is provided with least one cambered surface supporting seat board 112, i.e., cambered surface supporting seat board 112 is divided to for two groups, be respectively used to supporting across
Stitch two ends of beam 11, the lower section of supporting faceplate 111 have along travel direction set at least two along bridge to ribbed stiffener 114
And along perpendicular to travel direction set at least two direction across bridge ribbed stiffeners 113, along bridge to ribbed stiffener 114 be in inverted " t " type knot
Structure, the backbar lattice system to form closure is enclosed along bridge to ribbed stiffener 114 and direction across bridge ribbed stiffener 113, and each cambered surface supports seat board
112 may be contained within supporting respectively across two ends of seam beam 11, cambered surface across the lower section of seam beam 11, two groups of cambered surface supporting seat boards 112
Supporting seat board 112 causes to be suitable on horizontal direction translation and vertical direction greatly vertically across seam beam 11 part under external force
Corner.And in this retractor device 1, at least one broach board component 12 is at least being provided with side across seam beam 11, that is, is working as comb
When tooth plate component 12 is one, the wherein side of seam beam 11 is being provided with the broach board component 12, and is working as broach board component 12
For it is multiple when, then be provided with broach board component 12 across every side of seam beam 11, and the often 12 equal edge of each broach board component of side
Direction away from structural joint is set gradually, for being carried out between two adjacent broach board components 12 using rigid body elastic component 13
Connection, and across seam beam 11 between its adjacent broach board component 12 being connected by least one rigid hinge 115.Cause
This, retractor device 1 changes along the telescopic displacement on structural joint direction, is mainly held jointly by each broach board component 12
Load, and rigid body elastic component 13 is not influenceing fishback group as the connector between the broach board component 12 with certain rigidity
On the premise of the longitudinal extension change in displacement of part 12, and can ensures the stability of broach board component 12, at the same and can bear it is certain
Torsion moment of flexure, adaptation of the increase retractor device 1 to structural joint both sides twisting force.Meanwhile whole retractor device 1 passes through rigid body bullet
Property part 13 connects into an entirety, and rigid body elastic component 13 can play a part of damping, so as to increase the anti-seismic performance of structural joint.And
Connected using rigid hinge 115 across seam beam 11 and broach board component 12 so that across seam beam 11 with both sides broach board component 12 in structure
Upper relatively independent part is made, it can increase substantially adaptation of the retractor device 1 to structural joint both sides concrete vertical corner
Property, the structural joint of this feature large bridge higher to deck-molding, especially combined bridge is especially suitable.
Referring specifically to Fig. 1, optimize above-described embodiment, for increase the convenience of the construction and installation of retractor device 1 and Fast Installation,
Repairing ability, retractor device 1, which also includes, is installed on the first steel plate 14 that structural joint both sides concrete reserves mounting groove top, arc
Surface bearing seat board 112 and each broach board component 12 are then respectively positioned on the top of two first steel plate 14, and two the first steel plates 14 are respectively provided with
At least one anchor bar 142 being extending vertically into corresponding concrete.In the present embodiment, when supporting faceplate 111 is by wheel
During impact force action, impact load can be transferred to two pre-buried first steel plates 14 by retractor device 1, then by two the first steel plates 14
Each anchor bar 142 be transferred to concrete, force path is simple, clearly, and the setting of the first pre-buried steel plate 14 can be uniform
Impact load is spread, greatly strengthen the impact resistance of retractor device 1, avoids the broken of the nearby local concrete of retractor device 1
It is bad.
Referring to Fig. 1 and Fig. 2, continue to optimize above-described embodiment, be also associated between adjacent two broach board components 12
Can horizontal overlapping sliding panel 16, each sliding panel 16 is respectively positioned on the surface of corresponding rigid body elastic component 13, and each adjacent sliding panel
To be slidably connected between 16, certainly across seam beam 11 and and its close to broach board component 12 between be also connected with sliding panel 16,
It is located in rigid hinge 115.In the present embodiment, adjacent two broach board components 12 have spacing, and the spacing meets correlation
The code requirement of retractor device 1, sliding panel 16 is arranged above in rigid body elastic component 13, then produces water in retractor device 1
During square upward telescopic displacement, sliding panel 16 can the slip that is staggered with the telescopic displacement of rigid body elastic component 13.For above-mentioned knot
Structure, pitch oil and tallow or fluid sealant 17 are perfused with, the surface for being perfused with pitch oil and tallow or fluid sealant 17 is not higher than supporting faceplate
111 upper surface, plasticity body is concave after perfusion.This design is adapted to the telescopic displacement of broach board component 12, during extension
Pitch oil and tallow or fluid sealant 17 form concave surface, and concave surface tends to be smooth during compression, with formed to each sliding panel 16 with
The sealing of chamber between corresponding broach board component 12, the ponding above retractor device 1 are difficult to penetrate into it.
Referring to Fig. 2, further, there is retractor device 1 at least one anchoring extended horizontally in corresponding concrete to draw
Plate 141.Retractor device 1 also includes two supporting side plates 15 being vertically arranged, each to anchor arm-tie 141 and corresponding supporting side plate 15
Welding, and each supporting side plate 15 is fixedly connected with cambered surface supporting 12 times seat boards of seat board 112 and broach board component of respective side,
Each anchoring arm-tie 141 has certain thickness, and it is overall horizontally embedded in concrete, can be welded with the reserved steel bar in concrete
Connect, it can further improve anchorage effect of the retractor device 1 in concrete, strengthen the impact resistance of retractor device 1.Enter
One step, two-side supporting side plate 15 is welded with fixed bracket 152, and the broach board component 12 close to supporting side plate 15 is tied for activity
Structure, it is specially that the following faceplate part of the broach board component 12 is bascule, it passes through Anti-off bolt 151 and fixed bracket
152 connections.Its role is to by the setting of the movable panel 121a, make retractor device 1 not destroyed in bottom anchor system
In the case of, it can be repaired, changed or be conserved by opening drop front 121a, so as to reach the purpose of rapid rush-repair, together
When can also reduce maintenance difficulty, save maintenance cost.
Referring to Fig. 1, Fig. 2 and Fig. 4, specifically, the structure of refinement broach board component 12, each broach board component 12 wraps
Include the web 123 of panel 121, bottom plate 122 and connection panel 121 and bottom plate 122, panel 121 it is horizontally disposed and with across seam beam
In 11 supporting faceplate 111 is generally aligned in the same plane, bottom plate 122 is also at horizontality, the panel 121 of each broach board component 12
It is respectively provided with horizontal-extending some racks, the rack stagger setting of the panel 121 between two neighboring broach board component 12, and phase
Connected between two adjacent webs 123 using rigid body elastic component 13.In the present embodiment, web 123 is along the traveling perpendicular to vehicle
Direction is set, and each rigid body elastic component 13 connects two adjacent webs 123, rigid body elastic component 13 and web along travel direction
123 connection can use bolt or welding, so that each broach board component 12 across seam beam 11 the same side is an entirety,
And running branch of the panel 121 of each broach board component 12 with collectively forming retractor device 1 across the supporting faceplate 111 of seam beam 11
Bearing surface.Usually, 12 times seat boards of broach board component 124 are provided with the first steel plate 14 with broach board component 12, and applied
12 times seat boards of broach board component 124 weld or bolt is fixed on the first steel plate 14 of the side when work is installed, at the same also with
The supporting side plate 15 of the side is welded, and elastic laminated rubber bearing 18 is then installed on thereon, and in elastic laminated rubber bearing 18
On also tiling have the second steel plate 181, it is stainless steel, and each bottom plate 122 of each broach board component 12 is slideably positioned in the second steel
On plate 181.The elastic laminated rubber bearing 18 laid under each broach board component on seat board 124 can by horizontal plane not
Homogeneous compaction, to adapt between beam body due to torque influence caused by the reasons such as differential settlement.
Further, retractor device 1 also includes the waterproof roll 19 across structural joint, and the waterproof roll 19 is located at across seam
The underface of beam 11.In the present embodiment, installed on structural joint before seam beam 11 or broach board component 12, first in structural joint
Both sides concrete lay waterproof roll 19, waterproof roll 19 can be fixed on the concrete of structural joint both sides by buckle or glue
On.
Referring to Fig. 1 and Fig. 4, the embodiment of the present invention also provides a kind of bridge, including two abutments 2 and at least one beam
Body, forms structural joint between two adjacent beam bodies or between beam body and abutment 2, bridge also includes at least one above-mentioned
Retractor device 1, each retractor device 1 are across on the structural joint across seam beam 11, across seam beam 11 generally girder construction, work as structure
Stitch span increase when, only need to suitably increase across seam beam 11 structure height, the thickness of supporting faceplate 111 is constant, it is such a design compared with
It is entirely different that conventional broach plate stitch increases the method for the rigidity of supporting faceplate 111 by increasing panel construction thickness, with 1200mm
Exemplified by seam, the plate thickness of conventional broach board component reaches 140mm, and the thickness of the supporting faceplate 111 of this retractor device 1 is not tied
The influence of structure seam across footpath increase.Therefore, when structural joint span increase, the present invention can significantly save material, and economy is good.
When different bridges, when bridge is wide inconsistent, it is only necessary to which bridge direction across bridge sets multiple retractor devices 1, and each retractor device 1 is spelled successively
Connect, there is 2-5mm gap between adjacent two retractor devices 1, and usually, along the size of each retractor device 1 of direction across bridge
For 1m, 1.5m or 2m.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (11)
1. a kind of modularization, big corner, multi-directional deflection retractor device, including across structural joint across seam beam and at least one comb
Tooth plate component, it is characterised in that：It is described across seam beam include can across the supporting faceplate of the structural joint, it is described across seam beam in described
It is described across stitch in Liangqi one end and rotatably at least one cambered surface fulcrum bearing that the both sides of structural joint are provided with supporting respectively
Plate, it is described to be disposed with least one fishback group along the direction away from the structural joint across at least side of seam beam
Part, and between the adjacent two broach board component using rigid body elastic component connect, it is described across seam beam with and its described in
It is hinged between broach board component by least one rigidity.
2. modularization as claimed in claim 1, big corner, multi-directional deflection retractor device, it is characterised in that：Also include pre- potting
Two piece of first steel plate in concrete, two first steel plates are located at the both sides of the structural joint, each arc respectively
Surface bearing seat board and each broach board component are located on first steel plate of respective side respectively.
3. modularization as claimed in claim 2, big corner, multi-directional deflection retractor device, it is characterised in that：Two first steel
Plate is respectively provided with least one anchor bar extended straight down into the corresponding concrete.
4. modularization as claimed in claim 1, big corner, multi-directional deflection retractor device, it is characterised in that：Two adjacent institutes
State between broach board component, it is described across seam beam and and its close to the broach board component between be also respectively connected with and horizontal can overlap
Sliding panel, and the sliding panel between the two neighboring broach board component is located at the corresponding rigid body elastic component
Surface.
5. modularization as claimed in claim 4, big corner, multi-directional deflection retractor device, it is characterised in that：In each slip
The upper surface of plate is perfused with asphalt material or fluid sealant, and the surface of the asphalt material or the fluid sealant is not higher than the branch
The upper surface of bearing surface plate.
6. modularization as claimed in claim 2, big corner, multi-directional deflection retractor device, it is characterised in that：With the broach
Seat board under broach board component is provided with first steel plate of board component, and is laid under the broach board component on seat board
Elastic laminated rubber bearing, also tiling has the steel plate of stainless steel second, each fishback group on the elastic laminated rubber bearing
The bottom plate of part is slideably positioned on second steel plate.
7. modularization as claimed in claim 1, big corner, multi-directional deflection retractor device, it is characterised in that：Each broach
Board component include with the supporting faceplate be generally aligned in the same plane in panel, horizontal supporting bottom plate and be connected the panel and
The web of the bottom plate, connected using the rigid body elastic component between the two neighboring web.
8. modularization as claimed in claim 1, big corner, multi-directional deflection retractor device, it is characterised in that：Also prolong with level
Extend the structural joint and correspond at least one anchoring arm-tie in the concrete of side.
9. modularization as claimed in claim 1, big corner, multi-directional deflection retractor device, it is characterised in that：Also include across institute
The waterproof roll of structural joint is stated, the waterproof roll is positioned at described across the underface of seam beam.
10. a kind of bridge, including two abutments and at least one beam body, it is characterised in that：Also include at least one such as right
It is each modularization, big corner, multidirectional it is required that modularization, big corner, multi-directional deflection retractor device described in any one of 1-9
Displacement expansion device is installed between the abutment and the adjacent beam body or between the two neighboring beam body, and is located at institute
State each modularization between abutment and the adjacent beam body or between the two neighboring beam body, big corner, multidirectional change
Position retractor device is arranged side by side along direction across bridge.
11. bridge as claimed in claim 10, it is characterised in that：Each modularization of direction across bridge, big corner, multi-directional deflection are stretched
The size of compression apparatus is 1m, 1.5m or 2m, and adjacent two modularizations, big corner, multi-directional deflection retractor device it
Between have 2-5mm gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024785.7A CN105463987B (en) | 2015-12-30 | 2015-12-30 | Modularization, big corner, multi-directional deflection retractor device and bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024785.7A CN105463987B (en) | 2015-12-30 | 2015-12-30 | Modularization, big corner, multi-directional deflection retractor device and bridge |
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| Publication Number | Publication Date |
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| CN105463987A CN105463987A (en) | 2016-04-06 |
| CN105463987B true CN105463987B (en) | 2017-11-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926432B (en) * | 2016-04-27 | 2017-07-25 | 西咸新区鸿博新材料科技有限公司 | A kind of adaptive broach plate shape retractor device of Standardisation Cell formula and its installation method |
| CN107326803A (en) * | 2017-08-10 | 2017-11-07 | 安徽省交通规划设计研究总院股份有限公司 | The scattered displacement expansion joint of tandem |
| CN107401115A (en) * | 2017-08-16 | 2017-11-28 | 中铁第四勘察设计院集团有限公司 | Double articulated body systems bridge extension joint |
| CN112281645B (en) * | 2020-10-30 | 2021-12-07 | 南通大学 | Unit beam type multidirectional displacement telescopic device |
| CN114960414A (en) * | 2022-06-17 | 2022-08-30 | 湖北恋桥交通工程有限公司 | Modulus formula bridge telescoping device |
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| US4307974A (en) * | 1980-03-06 | 1981-12-29 | George Joseph D | Expansion joint seal |
| CN101725108A (en) * | 2009-12-31 | 2010-06-09 | 徐斌 | Bridge expansion joint device with ability of vertical deflection |
| CN203866701U (en) * | 2014-05-12 | 2014-10-08 | 上海彭浦橡胶制品有限公司 | Comb plate bridge telescopic device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105463987A (en) | 2016-04-06 |
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