CN108331370B - Reversible stair construction trestle - Google Patents

Reversible stair construction trestle Download PDF

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Publication number
CN108331370B
CN108331370B CN201810005660.7A CN201810005660A CN108331370B CN 108331370 B CN108331370 B CN 108331370B CN 201810005660 A CN201810005660 A CN 201810005660A CN 108331370 B CN108331370 B CN 108331370B
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China
Prior art keywords
rotatable
main beam
upright
girder
fixed
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CN201810005660.7A
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CN108331370A (en
Inventor
黄澎
蓝宇源
唐培成
朱红年
邹佳恒
林玉梅
龙期亮
覃芝菱
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Guangxi Construction Engineering Group Third Construction Engineering Co
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Guangxi Construction Engineering Group Third Construction Engineering Co
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Priority to CN201810005660.7A priority Critical patent/CN108331370B/en
Publication of CN108331370A publication Critical patent/CN108331370A/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G27/00Temporary arrangements for giving access from one level to another for men or vehicles, e.g. steps, ramps
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/60Planning or developing urban green infrastructure

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Steps, Ramps, And Handrails (AREA)

Abstract

The invention discloses a reversible stair construction trestle, which relates to the building construction technology and comprises a rotatable main beam, a fixed main beam, an upper vertical column I, an upper vertical column II, a lower vertical column I, a lower vertical column II, a step bearing frame, a stair pedal and an anti-overturning supporting device, wherein the upper end and the lower end of the rotatable main beam are respectively connected with the upper vertical column I and the lower vertical column I, the inner sides of the upper vertical column I and the lower vertical column I are respectively fixedly connected with a bearing I connected with the upper end and the lower end of the rotatable main beam, the upper end and the lower end of the fixed main beam are respectively fixedly connected with the upper vertical column II and the lower vertical column II, the step bearing frame is fixedly connected between the rotatable main beam and the fixed main beam, the stair pedal is positioned on the step bearing frame, the anti-overturning supporting device comprises a main connecting shaft connected with the middle part of the fixed main beam and a supporting device connected with the outer end of the main connecting shaft and capable of rotating and swinging relative to the main connecting shaft, and the rotatable main beam can drive the fixed main beam, the step bearing frame, the stair pedal and the anti-overturning supporting device to rotate together between the upper vertical column I and the lower vertical column I.

Description

Reversible stair construction trestle
Technical Field
The invention relates to a building construction technology, in particular to a stair construction trestle used in construction.
Background
After the construction project finishes the concrete construction of the floor surface of the nth floor, when entering the construction of the (n+1) th floor, the construction method for the constructors to go up and down the floors is as follows: utilize crude wood ladder, or climbing template steel pipe support frame, but more common way is: the stair templates are designed by using the building as main passages for people to go up and down, light materials and tools to carry.
The prior art has the following defects:
1. the safety is not guaranteed: before the stair tread plate steel bars are installed, anti-slip strips are nailed on the stair tread at intervals to serve as upper and lower supporting points, but people fall down due to the fact that the stair tread plate surface is smooth, gradient is steep, portable materials and tools need to be carried, and the like;
2. the quality of the ladder plate forming steel bars is affected: after the stair tread plate is installed, operators use the formed stair tread steel bar net sheets as anti-skid facilities to tread up and down, and binding points of steel bars, thickness of protective layers, intervals and the like are seriously damaged;
3. the finished product of the skirting board is damaged: after the skirting template is installed, an operator steps on the skirting template up and down, displacement and falling are easy to cause, and in the process of pouring and plastering the stair concrete, the worker steps on the skirting template to finish procedures such as pouring, vibrating and plastering, and the like, so that template displacement is caused, and the method is also one of reasons that the stair steps after the template is disassembled have section size deviation and the surface impression of the stair plate member is poor.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a reversible stair construction trestle which is convenient and safe, can ensure the quality of semi-finished products such as templates, reinforcing steel bars, concrete and the like, and can not restrict and pull elbows mutually during construction of adjacent working procedures such as template installation, reinforcing steel bar binding, concrete pouring and the like.
The technical scheme adopted by the invention for achieving the purpose is as follows: the utility model provides a stair construction landing stage that can overturn, including rotatable girder, fixed girder, go up stand I, go up stand II, lower stand I, lower stand II, take turns to the force-bearing frame, the stair footboard, prevent the device of propping that overturns, rotatable girder upper end is connected with last stand I, rotatable girder lower extreme is connected with lower stand I, go up stand I and I inboard fixedly connected with respectively with rotatable girder upper and lower end bearing I that is connected, fixed girder upper end and last stand II fixed connection, fixed girder lower extreme and lower stand II fixed connection, take turns to the force-bearing frame fixed connection between rotatable girder and fixed girder, the stair footboard is fixed on taking turns to the force-bearing frame, prevent that the device of propping includes to lean on middle part position fixed connection's main connecting axle and connection at main connecting axle outer end can rotate and wobbling strutting arrangement relatively, rotatable girder can drive fixed girder, take turns to the force-bearing frame, the stair footboard, prevent that the device of propping rotates together with it between last stand I and lower stand I.
The invention further adopts the technical scheme that: the rotatable main beam comprises an upper rotatable main beam and a lower rotatable main beam, and a rotatable connecting piece is connected between the upper rotatable main beam and the lower rotatable main beam; the fixed girder comprises an upper section fixed girder and a lower section fixed girder, a bracket connecting piece is connected between the upper section fixed girder and the lower section fixed girder, a middle vertical column which extends downwards is connected to the outer wall of the lower side of the rotatable connecting piece and the outer wall of the lower side of the bracket connecting piece respectively, and a middle vertical column connecting rod is connected between the two middle vertical columns.
The invention further adopts the technical scheme that: the rotatable connecting piece comprises a sleeve I, a sleeve II and a tooth-opening steel pipe, wherein external threads are respectively arranged at two ends of the tooth-opening steel pipe, an internal thread matched with the external threads of the tooth-opening steel pipe is respectively arranged on inner side pipe walls of first ends of the sleeve I and the sleeve II, a bearing II is respectively fixedly connected with inner side pipe walls of second ends of the sleeve I and the sleeve II, the first ends of the sleeve I and the sleeve II are respectively connected with the external threads of two ends of the tooth-opening steel pipe through the internal threads, the upper end of an upper section rotatable main beam is connected with the bearing I on the inner side of an upper upright post I, the lower end of the upper section rotatable main beam is connected with the bearing II on the inner side of a second end of the sleeve I, the lower end of the lower section rotatable main beam is connected with the bearing II on the inner side of the second end of the sleeve II, and the middle upright post is connected with the outer wall of the lower side of the sleeve II.
The invention further adopts the technical scheme that: the bracket connecting piece comprises a bolt and a tubular bracket, the inner diameter of the bracket is slightly larger than the outer diameters of the upper section fixed main beam and the lower section fixed main beam, bolt holes with mutually corresponding positions are respectively arranged on the groove walls of the upper end and the lower end of the bracket, the upper end of the upper section fixed main beam is fixedly connected with an upper stand column II, the lower end of the upper section fixed main beam is inserted into the bracket through an upper port of the bracket and is mutually positioned with the bracket through a bolt, the lower end of the lower section fixed main beam is fixedly connected with a lower stand column II, and the upper end of the lower section fixed main beam is inserted into the bracket through a lower port of the bracket and is mutually positioned with the bracket through the bolt, and a middle stand column is connected with the outer wall of the lower side of the bracket.
The invention further adopts the technical scheme that: the middle vertical column comprises a supporting steel pipe, a hydraulic supporting rod, a ground claw connecting screw rod and a ground claw, wherein the upper end of the supporting steel pipe is connected with the outer wall of a rotatable connecting piece or the outer wall of a bracket connecting piece, the upper end of the hydraulic supporting rod is connected with the lower end of the supporting steel pipe, the lower end of the hydraulic supporting rod is connected with the upper end of the ground claw connecting screw rod, a through hole matched with the ground claw connecting screw rod is formed in the middle of the ground claw, the ground claw is sleeved on the ground claw connecting screw rod, and a fixing nut for positioning the ground claw on the ground claw connecting screw rod is connected with the lower end of the ground claw connecting screw rod.
The invention further adopts the technical scheme that: the whole outline of ground claw is big-end-down's round platform form, and the through-hole sets up in the upper end of ground claw, and the ground claw lower extreme is equipped with the protruding tooth of evenly arranging, and ground claw rotatable cover is on ground claw connecting screw rod, and the axis that ground claw can be relative ground claw connecting screw rod is 0 ~ 60 degree within range.
The invention further adopts the technical scheme that: the supporting device comprises a connecting steel sheet, a connecting pin shaft and a supporting rod, wherein the connecting steel sheet is in a shape of a cross, a vertical arm of the connecting steel sheet is connected with the main connecting shaft and can rotate relative to the main connecting shaft, the connecting pin shaft is connected between two horizontal arms of the connecting steel sheet, and one end of the supporting rod is rotatably connected to the connecting pin shaft between the two horizontal arms of the connecting steel sheet.
The invention further adopts the technical scheme that: the stair tread support comprises a stair tread support body and is characterized in that the stair tread support body comprises two vertical bearing arms and two horizontal bearing arms, one end part of the same side of each of the two horizontal bearing arms is respectively and vertically connected with the bottom ends of the two vertical bearing arms, a middle bearing arm is connected between one ends of the two horizontal bearing arms, which are far away from the two vertical bearing arms, the upper ends of the two vertical bearing arms, the connection parts of the horizontal bearing arms and the middle bearing arms are respectively and fixedly connected with the inner side walls of the rotatable main beams and the inner side walls of the fixed main beams, and the stair tread is positioned in a space surrounded by the two horizontal bearing arms and the middle bearing arms.
The invention further adopts the technical scheme that: the stair tread is a glass fiber reinforced plastic grid.
The invention further adopts the technical scheme that: the upper upright post I comprises an upper upright post I and an upper upright post connecting arm I which is obliquely connected with the upper end of the upper upright post I and extends downwards, the lower upright post I comprises a lower upright post I and a lower upright post connecting arm I which is obliquely connected with the upper end of the lower upright post I and extends upwards, bearings I are respectively arranged in the upper upright post connecting arm I and the lower upright post connecting arm I, the upper end of the rotatable main beam is connected with the bearings I in the upper upright post connecting arm I, and the lower end of the rotatable main beam is connected with the bearings I in the lower upright post connecting arm I; the upper upright post II comprises an upper upright post II and an upper upright post connecting arm II which is obliquely connected with the upper end of the upper upright post II and extends downwards, the lower upright post II comprises a lower upright post II and a lower upright post connecting arm II which is obliquely connected with the upper end of the lower upright post II and extends upwards, the upper end of the fixed girder is connected with the upper upright post connecting arm II, and the lower end of the fixed girder is connected with the lower upright post connecting arm II.
The reversible stair construction trestle has the following beneficial effects:
1. the reversible stair construction trestle solves the problem of going up and down of the stair stepping passers and simultaneously ensures the personal safety of the stair stepping passers; the stair construction trestle is provided with the supporting device, does not need to be lapped on a template or a reinforcing steel bar, can effectively ensure the quality of semi-finished products such as the template, the reinforcing steel bar, the concrete and the like, and is convenient for construction;
2. according to the reversible stair construction trestle, through the connecting bearing I of the rotatable main beam, independent overturning of the upper section and the lower section of the trestle and integral overturning of the trestle can be realized, the overturning angle is 0-180 degrees, and interference of procedures such as rib arrangement, template installation and concrete pouring and tamping is reduced as much as possible while the passing of personnel is ensured; the overall length of the trestle can be automatically adjusted according to the length of a ladder section on a design drawing, the lower section is a fixed length, the upper section is an adjustable length, the rotatable main beam and the fixed main beam can be combined with the site condition to perform position exchange, a hydraulic support rod is arranged in a middle upright post, the height of the trestle frame body is supported, controlled and adjusted to a certain extent, a ground claw takes the upright post as a vertical line, the adjustment is performed at 0-60 degrees along the length direction of the ladder plate, the trestle with different gradients can be well adapted, an anti-overturning supporting device is arranged in the middle of the fixed main beam at the upper section and the lower section, the trestle (angle <90 degrees) which is turned up is effectively supported, and the trestle lifting device has the advantages of reasonable design, stable structure, simplicity and convenience in disassembly and capability of being flexibly arranged in combination with site conditions;
3. the reversible stair construction trestle provided by the invention is convenient to obtain, can be made of various materials such as steel, aluminum alloy and the like, can be manufactured on site, and can also be produced in batch in a factory.
The reversible stair construction trestle of the invention is further described below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic view of the rotatable main beam of the reversible stair construction trestle of the present invention connected to an upper upright I, a lower upright I and a center upright;
FIG. 2 is a schematic structural view of the connection of a fixed main girder of the reversible stair construction trestle with an upper upright II, a lower upright II and a middle upright;
FIG. 3 is a schematic view of the rotatable connection with the upper rotatable main beam and the lower rotatable main beam;
FIG. 4 is a schematic view of the sleeve I and sleeve II, respectively, in partial section on the basis of FIG. 3;
FIG. 5 is a schematic view of the bracket connection;
FIG. 6 is a schematic view of the bracket connection of FIG. 5 with an upper stationary main beam and a lower stationary main beam;
FIG. 7 is a schematic view of the structure of the center post connected to the swivel connection and bracket connection;
FIG. 8 is a partially exploded view of the center post;
FIG. 9 is a schematic view of the assembled structure of the center pillar;
FIG. 10 is a schematic view of the structure of the center pillar after rotation of the ground pawl;
FIG. 11 is a schematic view of the structure of the center pillar after the hydraulic support rod is retracted;
FIG. 12 is a schematic view of the structure of the anti-toppling stay device;
FIG. 13 is a schematic view of the structure of the step load frame;
FIG. 14 is a schematic view of the attachment of the step load frame to a rotatable or stationary main beam;
FIG. 15 is a schematic view of a fiberglass-reinforced plastic grille;
FIG. 16 is a schematic view of the connection of the upper rotatable main beam to the upper upright I;
FIG. 17 is a schematic view of the upper column I in partial section of FIG. 16;
FIG. 18 is a schematic view of the lower rotatable main beam connected to the lower upright I;
FIG. 19 is a schematic view of the lower column I of FIG. 18, partially cut away;
FIG. 20 is a schematic view of the connection of the upper stationary main beam to the upper upright II;
FIG. 21 is a schematic view of the upper column II of FIG. 20, partially cut away;
FIG. 22 is a schematic view of the connection of the lower stationary main beam to the lower column II;
FIG. 23 is a schematic view of the lower column II of FIG. 22, partially cut away;
FIG. 24 is a schematic view of the structure of the rotatable main beam, the stationary main beam, the step load frame, etc. after the connection of the frame structures;
FIG. 25 is a schematic view of the structure of the reversible stair construction gallery of the present invention;
FIG. 26 is a schematic diagram of a structure of a reversible stair construction gallery of the present invention after being turned 60 degrees (for comparing the structure before and after the turning, only the upper stair construction gallery is shown as a turned state);
FIG. 27 is a schematic view of a structure of a reversible stair construction gallery of the present invention after 90 degrees of turnover (for comparison of structures before and after turnover, only the upper stair construction gallery is shown as a turned state);
reference numerals illustrate: 1-lower upright I, 2-lower rotatable girder, 3-rotatable connector, 4-upper rotatable girder, 5-upper upright I, 6-middle upright, 7-lower upright II, 8-lower stationary girder, 9-bracket connector, 10-upper stationary girder, 11-upper upright II, 12-anti-toppling support device, 13-sleeve II, 14-open steel pipe, 15-sleeve I, 16-bearing II, 17-bracket, 18-bolt hole, 19-bolt, 20-middle upright connecting rod, 21-supporting steel pipe, 22-hydraulic support rod, 23-ground claw connecting screw, 24-ground claw, 25-fixing nut, 26-main connecting shaft, 27-connecting steel sheet, 28-connecting pin, 29-support rod, 30-vertical load arm, 31-horizontal load arm, 32-middle load arm, 33-step load arm, 34-stair tread, 35-supporting device, 36-upper vertical upright I, 37-upper upright connecting arm I, 38-bearing I, 39-lower upright I, 40-lower upright I, 41-lower upright II, and 43-lower upright II connecting arm.
Detailed Description
As shown in fig. 1 to 25, the reversible stair construction trestle (called as 'trestle' for short) comprises a rotatable main beam, a fixed main beam, an upper upright post I, an upper upright post II, a lower upright post I, a lower upright post II, a stepping bearing frame, a stair tread and anti-overturning supporting device.
As shown in FIG. 1, the upper end of the rotatable main beam is connected with an upper upright post I, the lower end of the rotatable main beam is connected with a lower upright post I, and the inner sides of the upper upright post I and the lower upright post I are respectively fixedly connected with a bearing I connected with the upper end and the lower end of the rotatable main beam. In this embodiment, the rotatable main beam includes an upper rotatable main beam and a lower rotatable main beam, and a rotatable connection member is connected between the upper rotatable main beam and the lower rotatable main beam. The outer wall of the lower side of the rotatable connecting piece is connected with a middle upright post which extends downwards.
As shown in fig. 3 and 4, in this embodiment, the rotatable connection member includes a sleeve i, a sleeve ii, and a toothed steel tube, two ends of the toothed steel tube are respectively provided with external threads, inner side walls of first ends of the sleeve i and the sleeve ii are respectively provided with an internal thread matched with the external threads of the toothed steel tube, inner side walls of second ends of the sleeve i and the sleeve ii are respectively fixedly connected with a bearing ii, and the second ends are the other ends opposite to the first ends. The first ends of the sleeve I and the sleeve II are respectively connected with external threads at two ends of the open-tooth steel pipe through internal threads. The upper end of the upper section rotatable main beam is connected with a bearing I on the inner side of an upper upright post I, the lower end of the upper section rotatable main beam is connected with a bearing II on the inner side of a second end of a sleeve I, the lower end of the lower section rotatable main beam is connected with a bearing I on the inner side of a lower upright post I, the upper end of the lower section rotatable main beam is connected with a bearing II on the inner side of a second end of a sleeve II, and the middle upright post is connected with the outer wall of the lower side of the sleeve II.
As shown in fig. 16 to 19, in this embodiment, the upper column i includes an upper vertical section column i and an upper column connecting arm i which is connected obliquely to the upper end of the upper vertical section column i and extends downward, the lower column i includes a lower vertical section column i and a lower column connecting arm i which is connected obliquely to the upper end of the lower vertical section column i and extends upward, bearings i are provided in the upper column connecting arm i and the lower column connecting arm i, respectively, the upper end of the rotatable main beam is connected with the bearings i in the upper column connecting arm i, and the lower end of the rotatable main beam is connected with the bearings i in the lower column connecting arm i. The upper vertical section upright post I, the upper upright post connecting arm I, the lower vertical section upright post I and the lower upright post connecting arm I are all formed by manufacturing steel pipes, and the connecting parts are connected in a welding mode.
As shown in fig. 2, the upper end of the fixed girder is fixedly connected with the upper upright post ii, the lower end of the fixed girder is fixedly connected with the lower upright post ii, the fixed girder comprises an upper section of fixed girder and a lower section of fixed girder, a bracket connecting piece is connected between the upper section of fixed girder and the lower section of fixed girder, and a middle upright post extending downwards is connected with the outer wall of the lower side of the bracket connecting piece.
As shown in fig. 5 and 6, in this embodiment, the bracket connecting piece includes a bolt and a tubular bracket, the inner diameter of the bracket is slightly larger than the outer diameters of the upper section of fixed girder and the lower section of fixed girder, bolt holes corresponding to each other are respectively provided on the groove walls of the upper end and the lower end of the bracket, and through holes corresponding to the bolt holes on the bracket are also provided on the lower end of the upper section of fixed girder and the upper end of the lower section of fixed girder. The upper end and the II fixed connection of upper column of the fixed girder of upper segment, the lower extreme of the fixed girder of upper segment inserts the bracket by the last port of bracket and fixes a position each other through bolt and bracket, the lower extreme and the II fixed connection of lower column of the fixed girder of lower segment, the upper end of the fixed girder of lower segment inserts the bracket by the port under the bracket and fixes a position each other through bolt and bracket, the downside outer wall connection of center pillar and bracket.
As shown in fig. 20 to 23, in this embodiment, the upper column ii includes an upper vertical section column ii and an upper column connecting arm ii which is connected obliquely to the upper end of the upper vertical section column ii and extends downward, the lower column ii includes a lower vertical section column ii and a lower column connecting arm ii which is connected obliquely to the upper end of the lower vertical section column ii and extends upward, the upper end of the fixed main beam is connected with the upper column connecting arm ii, and the lower end of the fixed main beam is connected with the lower column connecting arm ii. The upper vertical section column II, the upper column connecting arm II, the lower vertical section column II and the lower column connecting arm II are all formed by manufacturing steel pipes, and the joints are connected in a welding mode.
As shown in fig. 2 and 12, the anti-overturning supporting device comprises a main connecting shaft fixedly connected with the outer wall of the fixed main beam near the middle part and a supporting device connected to the outer end of the main connecting shaft and capable of rotating and swinging relative to the main connecting shaft. In this embodiment, the anti-overturning device is connected with the outer walls of the middle parts of the upper section fixed main beam and the lower section fixed main beam respectively, and the inner side of the main connecting shaft is welded and fixed with the outer walls of the middle parts of the upper section fixed main beam and the lower section fixed main beam. The supporting device comprises a connecting steel sheet, a connecting pin shaft and a supporting rod, wherein the connecting steel sheet is in a shape of a cross, a vertical arm of the connecting steel sheet is connected with the main connecting shaft and can rotate relative to the main connecting shaft, the connecting pin shaft is connected between two horizontal arms of the connecting steel sheet, and one end of the supporting rod is rotatably connected to the connecting pin shaft between the two horizontal arms of the connecting steel sheet. The whole supporting device can rotate around the main connecting shaft within 360 degrees, and different supporting directions are adjusted. The supporting rod can rotate within the range of 0-270 degrees around the connecting pin shaft, so that different supporting angles can be conveniently adjusted. When the trestle is laid flat, the trestle is supported by the upper upright I, the upper upright II, the lower upright I, the lower upright II and the middle upright jointly, and the anti-overturning supporting device is contained at the edges of the upper section fixed main beam and the lower section fixed main beam, as shown in fig. 25. When the trestle is turned over (angle is smaller than 90 degrees), the supporting rods of the anti-overturning supporting device, which are tightly attached to the upper section of fixed main beam and the lower section of fixed main beam at ordinary times, are rotated to be opened, and the trestle which is turned over and erected is effectively supported, as shown in fig. 26.
As shown in fig. 7 to 11, the middle vertical column comprises a supporting steel pipe, a hydraulic supporting rod, a ground claw connecting screw rod and a ground claw, wherein the upper end of the supporting steel pipe is connected with the outer wall of the rotatable connecting piece or the outer wall of the bracket connecting piece, and a middle vertical column connecting rod is connected between the outer walls of the supporting steel pipes of the two middle vertical columns. The hydraulic support rod is telescopic, the lower end of the hydraulic support rod is a telescopic end, and the most suitable supporting height is effectively adjusted through the hydraulic support rod. The upper end of the hydraulic support rod is connected with the lower end of the support steel pipe, the lower end of the hydraulic support rod is fixedly connected with the upper end of the ground claw connecting screw rod in a welding mode, a through hole matched with the ground claw connecting screw rod is formed in the middle of the ground claw, the ground claw is sleeved on the ground claw connecting screw rod, and the lower end of the ground claw connecting screw rod is connected with a fixing nut for positioning the ground claw on the ground claw connecting screw rod. The whole outline of ground claw is big-end-up's round platform form, and the through-hole sets up in the upper end of ground claw, and the ground claw lower extreme is equipped with the protruding tooth of evenly arranging, and ground claw rotatable cover is on ground claw connecting screw, and the axis that ground claw can be relative ground claw connecting screw inclines in 0 ~ 60 within range, can both be well adapted to the ladder of different grades, better let ground claw protruding tooth and ladder contact for the center pillar grabs ground firmly reliably.
As shown in fig. 13, 14 and 24 and 25, the tread support is fixedly connected between the rotatable main beam and the fixed main beam, and the stair tread is positioned on the tread support, as shown in fig. 18, and is a glass fiber reinforced plastic grid. The pedal bearing frame comprises two vertical bearing arms and two horizontal bearing arms, wherein one end parts of the same sides of the two horizontal bearing arms are respectively and vertically connected with the bottom ends of the two vertical bearing arms, an intermediate bearing arm is connected between one ends of the two horizontal bearing arms far away from the two vertical bearing arms, the upper ends of the two vertical bearing arms, the connection parts of the horizontal bearing arms and the intermediate bearing arms are respectively and fixedly connected with the inner side walls of the rotatable main beams and the inner side walls of the fixed main beams, and the stair pedals are positioned in a space surrounded by the two horizontal bearing arms and the intermediate bearing arms. The vertical bearing arm, the horizontal bearing arm and the middle bearing arm of the stepping bearing frame are all made of angle steel, and are mutually connected by welding. The connection between the stepping force-bearing frame and the rotatable main beam and the fixed main beam is also welding.
As shown in fig. 26 and 27, the rotatable main beam of the inventive trestle can drive the fixed main beam, the stepping force-bearing frame, the stair tread, the anti-overturning device and the like to rotate together with the rotatable main beam between the upper upright post i and the lower upright post i. After the trestle rotates, the middle vertical column connected with the bracket connecting piece in the middle of the fixed main beam is suspended and does not land any more, and at the moment, the supporting rod of the anti-overturning supporting device rotates, so that the supporting rod supports the weight of one side of the fixed main beam.
The above embodiments are merely preferred embodiments of the present invention, the structure of the present invention is not limited to the forms of the above embodiments, and any modifications, equivalents, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a rotatable stair construction landing stage, a serial communication port, including rotatable girder, fixed girder, go up stand I (5), go up stand II (11), lower stand I (1), lower stand II (7), step load frame (33), stair tread (34), prevent toppling strutting arrangement (12), rotatable girder upper end is connected with last stand I (5), rotatable girder lower extreme is connected with lower stand I (1), the inboard fixedly connected with of last stand I (5) and lower stand I (1) respectively with rotatable girder upper and lower end bearing I (38), fixed girder upper end and last stand II (11) fixed connection, fixed girder lower extreme and lower stand II (7) fixed connection, step load frame (33) fixed connection is between rotatable girder and fixed girder, stair tread (34) are fixed on step load frame (33), prevent toppling strutting arrangement (12) include with the outer wall of fixed girder lean on middle part position fixed connection's main connecting axle (26) and connect at main connecting axle (26) outer end rotatable about main connecting axle (26) and rotatable supporting arrangement (35), rotatable girder (33), rotatable supporting arrangement (1) and rotatable girder between the fixed stand I and lower bearing I; the rotatable main beam comprises an upper rotatable main beam (4) and a lower rotatable main beam (2), and a rotatable connecting piece (3) is connected between the upper rotatable main beam (4) and the lower rotatable main beam (2); the fixed girder comprises an upper section fixed girder (10) and a lower section fixed girder (8), a bracket connecting piece (9) is connected between the upper section fixed girder (10) and the lower section fixed girder (8), the outer wall of the lower side of the rotatable connecting piece (3) and the outer wall of the lower side of the bracket connecting piece (9) are respectively connected with a downward extending middle vertical column (6), and a middle vertical column connecting rod (20) is connected between the two middle vertical columns (6); the stair tread (34) is a glass fiber reinforced plastic grid.
2. The reversible stair construction trestle according to claim 1, characterized in that the rotatable connecting piece (3) comprises a sleeve I (15), a sleeve II (13) and a tooth-opening steel pipe (14), external threads are respectively arranged at two ends of the tooth-opening steel pipe (14), the sleeve I (15) and the inner side pipe wall of the first end of the sleeve II (13) are respectively provided with an internal thread matched with the external threads of the tooth-opening steel pipe (14), the sleeve I (15) and the inner side pipe wall of the second end of the sleeve II (13) are respectively fixedly connected with a bearing II (16), the sleeve I (15) and the first end of the sleeve II (13) are respectively connected with the external threads of two ends of the tooth-opening steel pipe (14) through the internal threads, the upper end of the upper rotatable main beam (4) is connected with a bearing I (38) on the inner side of the upper upright post I (5), the lower end of the upper rotatable main beam (4) is connected with a bearing II (16) on the inner side of the second end of the sleeve I (15), the lower end of the lower rotatable main beam (2) is connected with a bearing I (38) on the inner side of the lower upright post I (1), and the upper end of the lower rotatable main beam (2) is connected with a bearing II (16) on the inner side of the upper upright post (13).
3. The reversible stair construction gallery according to claim 1, wherein the bracket connecting piece (9) comprises a bolt (19) and a tubular bracket (17), the inner diameter of the bracket (17) is slightly larger than the outer diameters of the upper section fixed main beam (10) and the lower section fixed main beam (8), bolt holes (18) with mutually corresponding positions are respectively arranged on the groove walls of the upper end and the lower end of the bracket (17), the upper end of the upper section fixed main beam (10) is fixedly connected with the upper upright post II (11), the lower end of the upper section fixed main beam (10) is inserted into the bracket (17) through an upper port of the bracket (17) and is mutually positioned with the bracket (17) through the bolt (19), the lower end of the lower section fixed main beam (8) is fixedly connected with the lower upright post II (7), the upper end of the lower section fixed main beam (8) is inserted into the bracket (17) through a lower port of the bracket (17) and is mutually positioned with the bracket (17) through the bolt (19), and the middle upright post (6) is connected with the outer wall of the lower side of the bracket (17).
4. The reversible stair construction trestle according to claim 1, characterized in that the center pillar (6) comprises a supporting steel pipe (21), a hydraulic supporting rod (22), a ground claw connecting screw (23) and a ground claw (24), the upper end of the supporting steel pipe (21) is connected with the outer wall of the rotatable connecting piece (3) or the outer wall of the bracket connecting piece (9), the upper end of the hydraulic supporting rod (22) is connected with the lower end of the supporting steel pipe (21), the lower end of the hydraulic supporting rod (22) is connected with the upper end of the ground claw connecting screw (23), a through hole matched with the ground claw connecting screw (23) is arranged in the middle of the ground claw (24), the ground claw (24) is sleeved on the ground claw connecting screw (23), and a fixing nut (25) for positioning the ground claw (24) on the ground claw connecting screw (23) is connected with the lower end of the ground claw connecting screw (23).
5. The reversible stair construction trestle according to claim 4, characterized in that the whole outline of the ground claw (24) is in a shape of a round table with a small upper part and a large lower part, the through hole is arranged at the upper end of the ground claw (24), the lower end of the ground claw (24) is provided with protruding teeth which are uniformly distributed, the ground claw (24) is rotatably sleeved on the ground claw connecting screw rod (23), and the ground claw (24) can incline within the range of 0-60 degrees relative to the axis of the ground claw connecting screw rod (23).
6. The reversible stair construction trestle according to claim 1, characterized in that the supporting means comprises a connecting steel sheet (27), a connecting pin shaft (28) and a supporting rod (29), the connecting steel sheet (27) is in a shape of a' [, a vertical arm of the connecting steel sheet (27) is connected with the main connecting shaft (26) and can rotate relative to the main connecting shaft (26), the connecting pin shaft (28) is connected between two horizontal arms of the connecting steel sheet (27), and one end of the supporting rod (29) is rotatably connected on the connecting pin shaft (28) between two horizontal arms of the connecting steel sheet (27).
7. The reversible stair construction trestle according to claim 1, characterized in that the step bearing frame (33) comprises two vertical bearing arms (30) and two horizontal bearing arms (31), one end of the same side of each of the two horizontal bearing arms (31) is respectively and vertically connected with the bottom ends of the two vertical bearing arms (30), an intermediate bearing arm (32) is connected between one ends of the two horizontal bearing arms (31) far away from the two vertical bearing arms (30), the upper ends of the two vertical bearing arms (30), the connection parts of the horizontal bearing arms (31) and the intermediate bearing arms (32) are respectively and fixedly connected with the inner side walls of the rotatable main beams and the inner side walls of the fixed main beams, and the stair treads (34) are positioned in the space enclosed by the two horizontal bearing arms (31) and the intermediate bearing arms (32).
8. The reversible stair construction trestle according to claim 1, characterized in that the upper upright i (5) comprises an upper upright section upright i (36) and an upper upright connecting arm i (37) obliquely connected to the upper end of the upper upright section upright i (36) and extending downward, the lower upright i (1) comprises a lower upright section upright i (39) and a lower upright connecting arm i (40) obliquely connected to the upper end of the lower upright section upright i (39) and extending upward, bearings i (38) are respectively provided in the upper upright connecting arm i (37) and the lower upright connecting arm i (40), the upper end of the rotatable main beam is connected with bearings i (38) in the upper upright connecting arm i (37), and the lower end of the rotatable main beam is connected with bearings i (38) in the lower upright connecting arm i (40); the upper upright post II (11) comprises an upper vertical section upright post II (42) and an upper upright post connecting arm II (41) which is obliquely connected to the upper end of the upper vertical section upright post II (42) and extends downwards, the lower upright post II (7) comprises a lower vertical section upright post II (43) and a lower upright post connecting arm II (44) which is obliquely connected to the upper end of the lower vertical section upright post II (43) and extends upwards, the upper end of the fixed girder is connected with the upper upright post connecting arm II (41), and the lower end of the fixed girder is connected with the lower upright post connecting arm II (44).
CN201810005660.7A 2018-01-03 2018-01-03 Reversible stair construction trestle Active CN108331370B (en)

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CN111441580B (en) * 2020-04-08 2021-07-13 台州宏丰建设有限公司 Damping stair template for building construction and assembling method thereof
CN113671956B (en) * 2021-08-12 2024-05-03 广东电网有限责任公司 Electric power inspection device

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CN105756300A (en) * 2016-04-25 2016-07-13 北京凯盛建材工程有限公司 Assembled type stairway with inclination angle adjustable
CN206815886U (en) * 2017-04-26 2017-12-29 上海森大机械制造有限公司 A kind of scaffold pin-connected panel stair
CN207878963U (en) * 2018-01-03 2018-09-18 广西建工集团第三建筑工程有限责任公司 A kind of turnover stair construction plank road

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CN2611566Y (en) * 2003-02-28 2004-04-14 上海太比雅科技有限公司 Wall safety haddler
EP1772570A1 (en) * 2005-10-09 2007-04-11 Obrist Baugeräte AG Stairway convertible into a walkway
KR20100137818A (en) * 2009-06-23 2010-12-31 권오봉 A folding type stairs
KR20120091710A (en) * 2011-02-09 2012-08-20 삼성중공업 주식회사 Boarding device
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CN104264973A (en) * 2014-09-26 2015-01-07 无锡市晨源建筑器材有限公司 Stepwise scaffold
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CN207878963U (en) * 2018-01-03 2018-09-18 广西建工集团第三建筑工程有限责任公司 A kind of turnover stair construction plank road

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