CN102852232B - Constant-force tensioning device within limited length range - Google Patents
Constant-force tensioning device within limited length range Download PDFInfo
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- CN102852232B CN102852232B CN201210356679.9A CN201210356679A CN102852232B CN 102852232 B CN102852232 B CN 102852232B CN 201210356679 A CN201210356679 A CN 201210356679A CN 102852232 B CN102852232 B CN 102852232B
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Abstract
The invention discloses a constant-force tensioning device within a limited length range. The constant-force tensioning device is arranged between a first fixed end and a second fixed end, wherein he first fixed end and the second fixed end are linked in a sliding mode; the constant-force tensioning device comprises a tensioning mechanism which is arranged on the first fixed end, a support which is used for fixing one end of the tensioning mechanism, a rocker arm which is arranged on the support and a connecting rod which is connected between the rocker arm and the second fixed end; the rocker arm is provided with a center supporting shaft which is connected with the support by a hinge, a second connecting shaft which is connected with one end of the tensioning mechanism by a hinge and a first connecting shaft which is connected with the connecting rod; the constant-force tensioning device further comprises an inner support which is used for fixing the other end of the tensioning mechanism; and the inner support is connected with the other end of the tensioning mechanism by a hinge. The arm length of a first connecting point and the variation of spring force are in similarly linear direct proportion by using the rocker arm structure in which an included angle between each of the two connecting points and a supporting point is 110-120 degrees, so that the change of the generated final tensioning force is kept within a small range, and then, the constant-force tensioning purpose is achieved. The constant-force tensioning device is simple in structure, easy to manufacture and machine, low in cost and worthy of being greatly developed in building steel structures.
Description
Technical field
The present invention relates to a kind of for the tensioning equipment in building structure, particularly during a kind of telescopic variation within the scope of building structure generation certain length, the tensioning equipment that its stretching force can keep comparatively constant.
Background technology
Steel structure beam is the both sides glass curtain wall and steel structure system connecting agent structure.Because temperature Change is comparatively large, the larger change of the corresponding generation of its length of connecting cross beam, when crossbeam length reaches about 40 meters, the nearly 30mm of maximum changing value.The sectional area of connecting cross beam is comparatively large, and when temperature is lower, its pulling force is too large, and agent structure can be caused to damage, and during maximum temperature, extends too much, and glass curtain wall and steel structure system departs from agent structure.
Therefore, be necessary to design a kind of device, effectively can eliminate change in length and connecting cross beam can be kept to reach the constant force of designing requirement to both sides glass curtain wall and steel structure.
Summary of the invention
The deficiency of thermal expansion is there is between the steel work that the object of the invention is to overcome prior art, there is provided the tensioning equipment of the constant force in a kind of limited length extent, it effectively can be eliminated the change in length of crossbeam (or rope) and connecting cross beam can be kept to reach the constant force of designing requirement to both sides glass curtain wall and steel structure.
For achieving the above object, the present invention is by the following technical solutions:
Constant force tensioning equipment in limited length extent, described constant force tensioning equipment be located at be slidably connected between the first fixed end and the second fixed end; Described stopping means comprises the stretch-draw mechanism be located on the first fixed end, the bearing for fixing stretch-draw mechanism one end, the rocking arm be located on bearing, and is connected in the coupling bar between rocking arm and the second fixed end; Described rocking arm be provided with connect with bearing hinge central support shaft, with the second coupling spindle of one end hinge-coupled of stretch-draw mechanism and the first coupling spindle of connecting with coupling bar; Also comprise for bearing in the fixing stretch-draw mechanism other end; Described interior bearing and the other end hinge-coupled of stretch-draw mechanism.
Its further technical scheme is: the first fixed end and the second fixed end be slidably connected as horizontal direction; The line of central support shaft to the second coupling spindle becomes 110 ° ~ 120 ° with the line of centres of central support shaft to the first coupling spindle.
Its further technical scheme is: when the first described fixed end and the second fixed end are positioned at beeline, the line of centres of central support shaft to the first coupling spindle and horizon are 10 °, the line of centres of central support shaft to the second coupling spindle and vertical curve be to 10 outside stretch-draw mechanism ° ~ 20 °; When the first described fixed end and the second fixed end are positioned at longest distance, the line of central support shaft to the first coupling spindle and horizon are 30 ° ~ 50 °, the line of central support shaft to the second coupling spindle and vertical curve be to 10 inside stretch-draw mechanism ° ~ 20 °.
Its further technical scheme is: described stretch-draw mechanism comprise connect with interior bearing hinge spring fixed seat, with the spring sliding seat of rocking arm hinge-coupled, and be sheathed on the spring on spring fixed seat.
Its further technical scheme is: described spring fixed seat comprises the otic placode connected with interior bearing hinge and the sleeve member connected with otic placode, spring is arranged with outside sleeve member, sleeve member is also provided with the center cavity for penetrating spring sliding seat, described spring sliding seat comprises center rod and is set in the Coupling of center rod one end, is provided with adjusting nut and locking nut between described Coupling and center rod; Described center rod one end is provided with the threaded portion for connecting adjusting nut and locking nut, the other end and the second coupling spindle hinge-coupled.
Its further technical scheme is: described spring is disk spring, and quantity is several.
Its further technical scheme is: described coupling bar comprises fixed end connection part, rocking arm end connection part, and for the regulating sleeve holding connection part and rocking arm end connection part that is connected and fixed.
Its further technical scheme is: described bearing is two, comprises left support abutment and right support abutment, and described rocking arm comprises left rocking arm, right rocking arm, and the second described coupling spindle, the first coupling spindle; Left rocking arm is provided with the LC bolster with left support abutment hinge-coupled, and right rocking arm is provided with the right central support shaft with right support abutment hinge-coupled; The second described coupling spindle and stretch-draw mechanism hinge-coupled, the first described coupling spindle and coupling bar hinge-coupled.
Its further technical scheme is: the first described fixed end is provided with two and connects support plate, and through the 3rd coupling spindle for connecting with stretch-draw mechanism connected support plate in two; The second described fixed end is provided with two and connects seat board, and through the 4th coupling spindle for connecting with coupling bar connected seat board in two.
Its further technical scheme is: the first described fixed end is the short beam be fixedly connected with main body steel work, and the second described fixed end is the crossbeam be fixedly connected with another main body steel work; Described short beam and crossbeam connect together movably.
The present invention's beneficial effect is compared with prior art: the present invention utilizes has two interface (O namely in Fig. 1
1and O
2and the first coupling spindle in structure chart and the second coupling spindle) with the supporting-point (O namely in Fig. 1, and the central support shaft in structure chart) angle be the rocker structure of 110 ° ~ 120 °, (i.e. the first coupling spindle produces the application point O of final stretching force to make first connection place
1) brachium and the change of spring force present and be similar to linear proportional relation, thus make to produce the change that final stretching force keeps comparatively among a small circle, realize the object of constant force stretch-draw.Structure of the present invention is simple, and easily make processing, cost is low, is worth promoting in construction steel structure.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the stressed schematic diagram of two interfaces of constant force tensioning equipment specific embodiment in limited length extent of the present invention;
Fig. 2 is the schematic diagram of the constant force tensioning equipment specific embodiment in limited length extent of the present invention;
Fig. 3 is the structure chart (sectional view of center comprises short beam and crossbeam) that constant force tensioning equipment in limited length extent of the present invention is applied to the specific embodiment on the crossbeam of steel work;
Fig. 4 is stereogram embodiment illustrated in fig. 3;
Fig. 5 is coupling bar partial perspective view embodiment illustrated in fig. 3;
Fig. 6 is stretch-draw mechanism partial perspective view embodiment illustrated in fig. 3;
Fig. 7 is the sectional view of the center of Fig. 6;
Fig. 8 is rocking arm embodiment illustrated in fig. 3 and bearing partial perspective view;
Fig. 9 is right rocking arm lateral plan embodiment illustrated in fig. 3;
Figure 10 is the A-A sectional view of Fig. 9.
Description of reference numerals
A main body steel work B main body steel work
10 constant force tensioning equipment 21 short beams
22 crossbeams 221 connect seat board
222 the 4th coupling spindle 30 stretch-draw mechanisms
31 spring fixed seat 311 otic placodes
312 sleeve member 313 center cavities
32 spring sliding seat 321 center rod
322 Coupling 323 adjusting nuts
324 locking nut 33 disk springs
40 bearing 41 left support abutments
42 right support abutment 50 rocking arms
The right rocking arm of 50A left Rocker arm 5 0B
The right central support shaft of 51A LC bolster 51B
51 central support shaft 52 first coupling spindles
53 second coupling spindle 60 coupling bars
61 fixed end connection part 62 regulating sleeves
Bearing in 63 rocking arm end connection parts 70
71 connect support plate 72 the 3rd coupling spindle
3211 threaded portion 3221 annular chambers
Detailed description of the invention
In order to more fully understand technology contents of the present invention, below in conjunction with specific embodiment technical scheme of the present invention being introduced further and illustrating, but being not limited to this.
As shown in Figure 1, be the force analysis schematic diagram of the constant force tensioning equipment in limited length extent of the present invention.Wherein, O is fixed point bearing pin (i.e. central support shaft); By O
1, O, O
2the rocking arm of composition can rotate around O axle, O
1(i.e. the first coupling spindle), O
2((i.e. the second coupling spindle) point all has rotating bearing pin; F
1the stretching force that required horizontal direction is constant, F
2the motive force of spring, OO
1it is the brachium of stretching force; OO
2it is the brachium of spring thrust; OX and OO
1the angle α of composition is OO
1the initial angle of arm, choosing value is generally 10 ° ~ 15 ° °; OY is perpendicular to OX; O
1the position arrived by stretch-draw when maximum temperature by the crossbeam of stretch-draw (or rope); O
1' by the crossbeam of stretch-draw (or rope) position when temperature is minimum residing for stretch-draw; O
1o
1namely ' distance is in the horizontal direction crossbeam (or rope) is that crossbeam affects change in length maximum value by temperature from the size of minimum variable quantity (variable quantity the is called stroke) range to length time the highest of temperature.In whole process, be utilize the thrust of spring to keep stretching force F
1substantially constant is constant.
The present invention utilizes OO
1oO is rotated clockwise to around O point
1', when namely excursion is β angle, the characteristic that its sine value and angle change approximate proportional relation sets.Known by Fig. 1, F
1brachium OO to the fixed bias circuit O arm of force
1with the sine value of OX institute angle.When crossbeam shortens, the angle of (alpha+beta) increases, F
1the arm of force increases; OO simultaneously
2also and then rotate, further Compress Spring, the elastic force of spring increases, and counteracts F
1the change that the arm of force increases, maintains F
1constant, vice versa.From Structure Mechanism, when crossbeam (or rope) shortens, crossbeam (or rope) convergent force is active force, forces spring-compressed, and spring force increases; When crossbeam extends, the thrust of spring is active force.Eliminate crossbeam elongated portion, spring force reduces.Meet in whole change procedure, stretching force F
1× F
1to the arm of force=spring thrust F of O point
2× F
2to the arm of force of O point, F
1the arm of force increases, F
2spring force increases, F
1the arm of force reduces, F
2spring force reduces, and maintains F
1substantially constant.
As shown in Figure 2, be size and a stressing conditions needing the specific embodiment of stretching force 50 tons.For ensureing stretching force F
1deviation is not more than 5%, rocking arm stretch-draw arm OO
1be 10 ° with OX initial angle, the change change peak discharge that turns clockwise is 35 °, i.e. alpha+beta=45 °; Stretching force F
1be designed to 498KN(about 50 tons) environment residing for crossbeam, temperature from minimum the highest to temperature its length varying value be about 30mm(and also claim range).OO is calculated by range
1=110mm; F
2brachium OO
2calculate according to the parameter of spring, in example, disk spring selects D=250mmd=127mm t=14mm h
o=5.6mm is as decrement f=4.2mm, spring force P=249KN, and disc spring film number: 24, selects the maximum compressibility of spring to be 4.8mm, then the elastic force P=284.57KN of spring in this example.According to F
1=498KNF
2=284.57KN; Then F
2brachium
Round numbers OO
2its stroke of=143mm is: 2 × 143 × sin17.5 °=86mm
Spring force needed for disk spring is in mechanism during minimum spring force is 69.75KN, i.e. F
2=69.75KN, then
Needed for disk spring is in mechanism, during range, spring force is 282KN, i.e. F
2=282KN, then
As arm OO
1when rotating 17.5 °, disk spring is in whole stroke centre position, and spring force is (69.75+282)/2=175.88KN and F
2=175.88KN, then
From above-mentioned calculating: F
1be no more than 3KN at whole stroke large deviations, namely deviation is about 6 ‰.
In other embodiment, can required different stretching forces be complied with, and different deformation displacement amounts, determine the waving angle β of start angle α and rocking arm, and the length of stretch-draw arm and spring arm.Wherein, the angular range that can select is: when the first fixed end and the second fixed end are positioned at beeline, the line of centres of central support shaft to the first coupling spindle and horizon (the α angle namely in Fig. 1) are 5 ° ~ 10 °, the line of centres of central support shaft to the second coupling spindle and vertical curve be to 10 outside stretch-draw mechanism ° ~ 20 ° (β/2 jiao namely in Fig. 1 on the right side of OY line); When first fixed end and the second fixed end are positioned at longest distance, the line of central support shaft to the first coupling spindle and horizon are 30 ° ~ 50 ° (alpha+beta/2 namely in Fig. 1), the line of central support shaft to the second coupling spindle and vertical curve be to 10 inside stretch-draw mechanism ° ~ 20 ° (β/2 jiao namely in Fig. 1 on the left of OY line).The length of the arm of force is then selected according to the needs of stretching force.
As shown in Figures 3 to 10, be the concrete structure explanation of the constant force tensioning equipment in limited length extent of the present invention.Constant force tensioning equipment 10 be located at be slidably connected between the first fixed end and the second fixed end, wherein, the first fixed end is short beam 21, second fixed end be fixedly connected with main body steel work A is the crossbeam 22 be fixedly connected with another main body steel work B; Short beam 21 and crossbeam 22 connect together movably.
Constant force stopping means 10 comprises the stretch-draw mechanism 30 be located on short beam 21, the bearing 40 for fixing stretch-draw mechanism 30 one end, the Rocker arm 50 be located on bearing 40, and is connected in the coupling bar 60 between Rocker arm 50 and crossbeam 22; Rocker arm 50 be provided with the central support shaft 51 of bearing 40 hinge-coupled, with the second coupling spindle 53 of one end hinge-coupled of stretch-draw mechanism 30 and the first coupling spindle 52 of connecting with coupling bar 60; Also comprise for bearing 70 in fixing stretch-draw mechanism 30 other end; The other end (i.e. fixed end) hinge-coupled of interior bearing 70 and stretch-draw mechanism 30.
Short beam 21 is slidably connected as horizontal direction with crossbeam 22; The line of central support shaft to the second coupling spindle becomes with the line of centres of central support shaft to the first coupling spindle 117.5 ° (namely 10 °+90 °+17.5 °).
Stretch-draw mechanism 30 comprise with the spring fixed seat 31 of interior bearing 70 hinge-coupled, with the spring sliding seat 32 of Rocker arm 50 hinge-coupled, and be sheathed on the spring of the cylindrical of spring fixed seat and the inner chamber of spring sliding seat.Spring is disk spring 33, and quantity is 24.
Spring fixed seat 31 comprises and be two in otic placode 311(the present embodiment of interior bearing 70 hinge-coupled) and the sleeve member 312 that connects with otic placode 311, disk spring 33 is arranged with outside sleeve member 312, sleeve member 312 is also provided with the center cavity 313 for penetrating spring sliding seat 32, spring sliding seat 32 comprises center rod 321 and is set in the Coupling 322 of center rod 321 one end, is provided with adjusting nut 323 and locking nut 324 between Coupling 322 and center rod 321; Center rod 321 one end is provided with the threaded portion 3211 for connecting adjusting nut 323 and locking nut 324, the other end and the second coupling spindle 53 hinge-coupled.Coupling 322 is provided with the annular chamber 3221(being inserted in disk spring 33 and positions disk spring).
Coupling bar 60 comprises fixed end connection part 61, rocking arm end connection part 63, and for the regulating sleeve 62 holding connection part 61 and rocking arm end connection part 63 that is connected and fixed.
Bearing 40 is two, comprises left support abutment 41 and right support abutment 42, and Rocker arm 50 comprises left Rocker arm 5 0A, right Rocker arm 5 0B, and for connecting second coupling spindle 53, first coupling spindle 52 of left Rocker arm 5 0A and right Rocker arm 5 0B; Left Rocker arm 5 0A is provided with the LC bolster 51A with left support abutment 41 hinge-coupled, and right Rocker arm 5 0B is provided with the right central support shaft 51B with right support abutment 42 hinge-coupled; Second coupling spindle 53 and center rod 321 hinge-coupled, rocking arm end connection part 62 hinge-coupled of the first coupling spindle 52 and coupling bar 60.The structure stress of this bearing and rocking arm is even, and structure is simple, handling ease, and can make larger dimensional structure, is easy to provide enough stretching forces.
Be provided with two in short beam 21 and connect support plate 71, and through the 3rd coupling spindle 72 for connecting with two otic placodes 311 of spring fixed seat 31 connected support plate 71 in two, constitute interior bearing 70 with this.Crossbeam 22 is provided with two and connects seat board 221, and through the 4th coupling spindle 222 for connecting with the fixed end connection part 61 of coupling bar 60 connected seat board 221 in two.
In sum, the present invention utilizes and has two interface (O namely in Fig. 1
1and O
2and the first coupling spindle in structure chart and the second coupling spindle) with the supporting-point (O namely in Fig. 1, and the central support shaft in structure chart) angle be the rocker structure of 110 ° ~ 120 °, (i.e. the first coupling spindle produces the application point O of final stretching force to make first connection place
1) brachium and the change of spring force present and be similar to linear proportional relation, thus make to produce the change that final stretching force keeps comparatively among a small circle, realize the object of constant force stretch-draw.Structure of the present invention is simple, and easily make processing, cost is low, is worth promoting in construction steel structure.
Above-mentionedly only further illustrate technology contents of the present invention with embodiment, so that reader is easier to understand, but does not represent embodiments of the present invention and be only limitted to this, any technology done according to the present invention extends or recreation, all by protection of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (9)
1. the constant force tensioning equipment in limited length extent, described constant force tensioning equipment be located at be slidably connected between the first fixed end and the second fixed end; It is characterized in that described constant force tensioning equipment comprises the stretch-draw mechanism be located on the first fixed end, the bearing for fixing stretch-draw mechanism one end, the rocking arm be located on bearing, and be connected in the coupling bar between rocking arm and the second fixed end; Described rocking arm be provided with connect with bearing hinge central support shaft, with the second coupling spindle of one end hinge-coupled of stretch-draw mechanism and the first coupling spindle of connecting with coupling bar; Also comprise for bearing in the fixing stretch-draw mechanism other end; Described interior bearing and the other end hinge-coupled of stretch-draw mechanism; The first described fixed end and the second fixed end be slidably connected as horizontal direction; The line of central support shaft to the second coupling spindle becomes 110 ° ~ 120 ° with the line of centres of central support shaft to the first coupling spindle.
2. the constant force tensioning equipment in limited length extent according to claim 1, when it is characterized in that the first described fixed end and the second fixed end are positioned at beeline, the line of centres of central support shaft to the first coupling spindle and horizon are 10 °, the line of centres of central support shaft to the second coupling spindle and vertical curve be to 10 outside stretch-draw mechanism ° ~ 20 °; When the first described fixed end and the second fixed end are positioned at longest distance, the line of central support shaft to the first coupling spindle and horizon are 30 ° ~ 50 °, the line of central support shaft to the second coupling spindle and vertical curve be to 10 inside stretch-draw mechanism ° ~ 20 °.
3. the constant force tensioning equipment in limited length extent according to claim 1, it is characterized in that described stretch-draw mechanism comprise connect with interior bearing hinge spring fixed seat, with the spring sliding seat of rocking arm hinge-coupled, and be sheathed on the spring on spring fixed seat.
4. the constant force tensioning equipment in limited length extent according to claim 3, it is characterized in that described spring fixed seat comprises the otic placode connected with interior bearing hinge and the sleeve member connected with otic placode, spring is arranged with outside sleeve member, sleeve member is also provided with the center cavity for penetrating spring sliding seat, described spring sliding seat comprises center rod and is set in the Coupling of center rod one end, is provided with adjusting nut and locking nut between described Coupling and center rod; Described center rod one end is provided with the threaded portion for connecting adjusting nut and locking nut, the other end and the second coupling spindle hinge-coupled.
5. the constant force tensioning equipment in limited length extent according to claim 3, it is characterized in that described spring is disk spring, quantity is several.
6. the constant force tensioning equipment in limited length extent according to claim 1, is characterized in that described coupling bar comprises fixed end connection part, rocking arm end connection part, and for the regulating sleeve holding connection part and rocking arm end connection part that is connected and fixed.
7. the constant force tensioning equipment in limited length extent according to claim 1, is characterized in that described bearing is two, comprises left support abutment and right support abutment, described rocking arm comprises left rocking arm, right rocking arm, and the second described coupling spindle, the first coupling spindle; Left rocking arm is provided with the LC bolster with left support abutment hinge-coupled, and right rocking arm is provided with the right central support shaft with right support abutment hinge-coupled; The second described coupling spindle and stretch-draw mechanism hinge-coupled, the first described coupling spindle and coupling bar hinge-coupled.
8. the constant force tensioning equipment in limited length extent according to claim 1, is characterized in that the first described fixed end is provided with two and connects support plate, and through the 3rd coupling spindle for connecting with stretch-draw mechanism connected support plate in two; The second described fixed end is provided with two and connects seat board, and through the 4th coupling spindle for connecting with coupling bar connected seat board in two.
9. the constant force tensioning equipment in limited length extent according to claim 1, is characterized in that the first described fixed end is the short beam be fixedly connected with main body steel work, and the second described fixed end is the crossbeam be fixedly connected with another main body steel work; Described short beam and crossbeam connect together movably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210356679.9A CN102852232B (en) | 2012-09-24 | 2012-09-24 | Constant-force tensioning device within limited length range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210356679.9A CN102852232B (en) | 2012-09-24 | 2012-09-24 | Constant-force tensioning device within limited length range |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102852232A CN102852232A (en) | 2013-01-02 |
| CN102852232B true CN102852232B (en) | 2015-01-07 |
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ID=47399175
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210356679.9A Active CN102852232B (en) | 2012-09-24 | 2012-09-24 | Constant-force tensioning device within limited length range |
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|---|---|---|---|---|
| DE29905418U1 (en) * | 1999-03-29 | 1999-06-17 | Dorma Gmbh + Co. Kg, 58256 Ennepetal | Device for releasably fastening a building slab |
| CN2486635Y (en) * | 2001-05-24 | 2002-04-17 | 珠海市晶艺玻璃工程有限公司 | Stress regulator in cable rod system |
| CN2763381Y (en) * | 2004-12-31 | 2006-03-08 | 白宝鲲 | Support device for stretching-drawing structure of rod-cable for curtain wall with overload protective function |
| CN2763382Y (en) * | 2004-12-31 | 2006-03-08 | 白宝鲲 | Spring support device for stretching-drawing structure of curtain wall |
| CN2795318Y (en) * | 2005-05-20 | 2006-07-12 | 上海华艺幕墙系统工程有限公司 | Single way cable curtain wall nchoring device capable of regulating pulling force |
| CN202850504U (en) * | 2012-09-24 | 2013-04-03 | 深圳市三鑫幕墙工程有限公司 | Constant force stretch-draw device in the range of finite length |
-
2012
- 2012-09-24 CN CN201210356679.9A patent/CN102852232B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29905418U1 (en) * | 1999-03-29 | 1999-06-17 | Dorma Gmbh + Co. Kg, 58256 Ennepetal | Device for releasably fastening a building slab |
| CN2486635Y (en) * | 2001-05-24 | 2002-04-17 | 珠海市晶艺玻璃工程有限公司 | Stress regulator in cable rod system |
| CN2763381Y (en) * | 2004-12-31 | 2006-03-08 | 白宝鲲 | Support device for stretching-drawing structure of rod-cable for curtain wall with overload protective function |
| CN2763382Y (en) * | 2004-12-31 | 2006-03-08 | 白宝鲲 | Spring support device for stretching-drawing structure of curtain wall |
| CN2795318Y (en) * | 2005-05-20 | 2006-07-12 | 上海华艺幕墙系统工程有限公司 | Single way cable curtain wall nchoring device capable of regulating pulling force |
| CN202850504U (en) * | 2012-09-24 | 2013-04-03 | 深圳市三鑫幕墙工程有限公司 | Constant force stretch-draw device in the range of finite length |
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| Publication number | Publication date |
|---|---|
| CN102852232A (en) | 2013-01-02 |
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