CN110424766B

CN110424766B - Stair guardrail repairing method

Info

Publication number: CN110424766B
Application number: CN201910784896.XA
Authority: CN
Inventors: 何俨; 邱长林; 杨洋
Original assignee: China Metallurgical Construction Engineering Group Co Ltd
Current assignee: China Metallurgical Construction Engineering Group Co Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2021-02-26
Anticipated expiration: 2039-08-23
Also published as: CN110424766A

Abstract

The invention discloses a stair guardrail repairing method, which comprises the following steps: s1, cutting the damaged cross rod part of each floor guardrail and dismantling the vertical rod part; s2, recording the quantity and size of the cross bars and vertical bars needed to be repaired of the guardrails of each floor, and customizing the cross bars and vertical bars needed to be repaired; s3, installing a support frame at the side end of the stair step corresponding to the corresponding guardrail restoration to support the cutting and/or dismantling part of the guardrail; s4, conveying the cross bars and/or vertical bars prefabricated in each S2 factory to corresponding floors, installing support frames at corresponding cutting and/or dismantling positions, directly welding the cross bars to the corresponding cross bar cutting positions in a welding mode under the support frames of the support frames, and installing the vertical bars to the corresponding vertical bar dismantling positions; s5, grinding and polishing the welding position; and S6, painting protection. The stair guardrail repairing method can effectively improve the safety and stability of the guardrail repairing waiting period and the repairing period, and the repaired guardrail is stable.

Description

Stair guardrail repairing method

Technical Field

The invention relates to a stair guardrail repairing process, in particular to a stair guardrail repairing method.

Background

To the stair guardrail of live time overlength in the residential quarter, through long-time wind-blown sun rain or moist air soaks and attacks, corrosion damage phenomenon always appears, for the safety of people's walk up and down stairs, can restore the guardrail. Generally, in the repairing process, after the whole stair section guardrail is cut, a newly manufactured guardrail is welded on an original stair base, or a new rod piece is manufactured after a damaged part of guardrail is cut and welded. There is a safety hazard in this process: 1. the base of the stair guardrail can be rusted, after the base is removed and embedded again, the newly poured concrete has a strength standard reaching period, and the guardrail welded on the original base can not achieve the safe bearing effect temporarily; 2. after the damaged guardrail is mainly stressed upright stanchion cut, the time for replacing the new member bar is made, and the transverse member bar of the handrail connected with the stressed upright stanchion can not play the safety role of the guardrail because of being suspended.

Therefore, how to provide a stair guardrail repairing method which can effectively improve the safety of a guardrail in a guardrail repairing waiting period and can improve the stability of a guardrail repairing process in the guardrail repairing period is a problem to be solved urgently. In addition, when the damaged part of the guardrail is cut, the cutter vibrates greatly, and other parts of the guardrail are easily damaged.

Disclosure of Invention

Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a stair guardrail repairing method which can effectively improve the safety and stability of a guardrail cutting period, a guardrail repairing waiting period and a repairing period.

In order to solve the technical problems, the invention adopts the following technical scheme:

a stair guardrail repairing method is characterized by comprising the following steps: s1, cutting the damaged cross rod part of each floor guardrail, dismantling the vertical rod part, and installing a support frame at the side end close to the cutting point of the stair guardrail to support the cutting and/or dismantling part of the guardrail before or after the cross rod of the stair guardrail is cut or the vertical rod is dismantled; when the cross bars of the stair guardrail are cut, the cross bars of the guardrail need to be obliquely cut, and when the vertical rods are removed, the bases of the guardrail need to be removed together; the support frame comprises a fixed base fixedly installed on the outer side of the stair step, a telescopic rectangular tube is rotatably installed on the fixed base, a plurality of installation sleeves are arranged on the telescopic rectangular tube in a spacing sleeve mode, each installation sleeve can slide up and down along the length direction of the telescopic rectangular tube and is positioned, a positioning plate capable of rotating circumferentially is installed on the same side of each installation sleeve and each installation sleeve, the positioning plate is a strip-shaped plate with a sliding groove in the middle, at least one cross rod supporting piece is arranged on the sliding groove side of each positioning plate, one end of each cross rod supporting piece penetrates through the sliding groove and is connected with the positioning plate, the other end of each cross rod supporting piece can be buckled with a cross rod of the stair guardrail, the cross rod supporting pieces can slide along the length direction of the sliding groove and can move back and forth in the axial; s2, when the guardrail cross bars are cut and/or the vertical rods are dismantled, the number and the size of the cross bars and the vertical rods required to be repaired of the guardrails of each floor are synchronously recorded, and the cross bars and the vertical rods required to be repaired are individually customized to a factory in a list form; s3, conveying the cross bars and/or vertical bars prefabricated in each S2 factory to corresponding floors, installing support frames at corresponding cutting and/or dismantling positions, directly welding the cross bars to the corresponding cross bar cutting positions in a welding mode under the support frames of the support frames, and installing the vertical bars to the corresponding vertical bar dismantling positions; s4, after all the cross rods are welded and the upright rods are installed in place, grinding and polishing the welding positions of the cross rods; s5, after painting protection is carried out on the guardrail, concrete repair is carried out on the base of the upright rod; and S6, after the guardrail is stabilized, detaching the support frame. Like this, carry out earlier cutting, measure the mode of statistics back mill customization restoration member again in restoration earlier stage, can effectively pool the required member restoration volume of stair guardrail, simultaneously, the mode of cutting earlier and measuring statistics again also can effectively ensure that each horizontal pole restores the size accurate, can not cause the material extravagant to cutting phenomenon repeatedly can effectively shorten repair time. After the cross rod part is obliquely cut, the welding area of the joint of the cross rod at the later stage can be effectively increased, the cut cross rod can play a certain supporting role on the cross rod to be repaired, the strength after welding is effectively increased, and the welding difficulty is reduced. And after erection bracing frame supports the horizontal pole before the cutting, can effectively guarantee the guardrail before restoreing and during restoreing normal use, simultaneously, can also form certain support to the guardrail, prevent that the guardrail warp in the cutting process, can also restore at the guardrail and accomplish the back, the pole setting concrete supports welding department before not solidifying for the later stage guardrail has better steadiness. In addition, after the repair is finished, the support frame can be detached for reuse. The length of the telescopic rectangular tube in the support frame can be adjusted, so that the support frame can meet the support requirements of guardrails with different heights; the mounting sleeve can slide up and down and be positioned, the positioning plate above the mounting sleeve can be driven to move up and down along with the mounting sleeve, the mounting height of the positioning plate is adjusted to enable the positioning plate to correspond to the guardrail cross rod, and after the position of the positioning plate is adjusted, the mounting sleeve can be fixed to enable the position of the mounting sleeve to be fixed, and displacement cannot be generated under the influence of gravity and operation; after the positioning plate can rotate in the circumferential direction, the rotating angle of the positioning plate can be adjusted to enable the positioning plate to correspond to the position of the guardrail cross rod to be supported; the cross rod supporting piece can slide in the sliding groove of the positioning plate, so that the cross rod can be sleeved from a cutting position conveniently, the installation is more convenient, meanwhile, the cross rod supporting piece can also adapt to different cutting width requirements, after the cross rod is sleeved in, the position of the cross rod supporting piece can be fixed, and the cross rod supporting piece, the positioning plate, the installation sleeve and the telescopic vertical rod form a support for the cross rod. Above-mentioned support frame can adapt to different guardrail heights, different cutting width, to the support requirement of guardrail, supports the back to the guardrail, can keep the stationarity of guardrail, prevents to appear inclining in the repair process, influences the pleasing to the eye of later stage guardrail, can also prevent the guardrail simultaneously and empty the potential safety hazard that takes place. In addition, install it in the side, can not lead to the fact the restoration of later stage guardrail to block, the carriage can also pull down back reuse in addition after using.

Further, the concrete installation steps of the support frame and the guardrail cross rod are as follows: the fixed base is installed at the side end of the stair, then the length of the telescopic rectangular tube and the position of each installation sleeve are adjusted to enable the telescopic rectangular tube to correspond to the height of the corresponding cross rod on the guardrail, and then the telescopic rectangular tube and the installation sleeves are fixed; after the installation sleeves are fixed, the cross rod supporting piece and the guardrail cross rod on one side of each installation sleeve and the positioning plate are fixed through clamping, and the guardrail cross rod is fixed through the cross rod supporting piece and the telescopic rectangular tubes. Therefore, after the corroded part of the guardrail is cut, the support frame can be arranged in the middle of the cut part correspondingly, the fixing base of the support frame is arranged at the side end of the stair, then the length of the telescopic rectangular tube and the position of each positioning plate are adjusted, the telescopic rectangular tube can correspond to the height of the corresponding cross rod on the guardrail, then the cross rod support piece on each positioning plate and the cross rod of the guardrail are fixed through clamping, and the support frame and the telescopic rectangular tube are fixed. When the fixed base is installed, the fixed base is firstly rotated to be inclined and can be completely attached to the side end of the stair, so that the fixed base and the side end of the stair can be well fixed. After the positioning plate is adjusted to a proper height, the positioning plate needs to rotate to enable the inclination angle of the positioning plate to be consistent with that of the guardrail cross rod, and the cross rod supporting piece above the positioning plate can correspond to the guardrail cross rod to be sleeved. When the cross rod supporting piece is sleeved, the cross rod supporting piece needs to be firstly slid to the position where the guardrail cross rod is cut, and the inner sleeve of the guardrail cross rod is cut from the side edge.

Furthermore, the fixed base comprises a square pipe which is transversely arranged, two base plates are arranged on the inner side of the square pipe at intervals, the upper end and the lower end of each base plate extend out of the square pipe, and the extending part of each base plate is provided with at least one expansion bolt for fixing the base plate on the side surface of the stair; the upper end of the square pipe and the width direction of the square pipe are fixedly provided with a hinge seat, and the lower end of the telescopic rectangular pipe is rotatably arranged on the hinge seat through a rotating shaft; when the fixing base is installed, the fixing base needs to be rotated firstly, so that the fixing base is inclined and can be attached to the stair step side, and then the expansion bolt is installed in concrete of the stair step side. Like this, unable adjustment base passes through expansion bolts to be fixed in the stair side, both has better steadiness, and convenient the dismantlement still simultaneously to make the support frame can realize reuse's purpose. The fixed area that the backing plate that sets up more can increase square pipe provides the condition for setting up several fixed points more, simultaneously, sets up the backing plate after, expansion bolts need not run through square pipe, can effectively guarantee pleasing to the eye and the intensity of square pipe. Articulated seat that sets up on square pipe provides the mounted position for telescopic square tube, sets up this articulated seat after, the unable adjustment base is rotatory to be the slope form after, can not influence telescopic square tube yet and keep vertical state.

Furthermore, the telescopic rectangular pipe consists of an upper rectangular pipe and a lower rectangular pipe, the upper rectangular pipe is sleeved in the lower rectangular pipe, a threaded hole is formed in the upper end of the lower rectangular pipe, and a tightening bolt used for fixing the upper rectangular pipe in the lower rectangular pipe is sleeved on the threaded hole; when the telescopic supporting pipe is adjusted, the extending height of the upper rectangular pipe is required to be adjusted according to the height of the guardrail to be maintained, and the upper rectangular pipe is fixed on the lower rectangular pipe in a manner of rotating the puller bolt after the adjustment is finished. Like this, go up the quarter bend and can follow down quarter bend direction of height and slide from top to bottom to adopt the tight bolt of top to fix on last quarter bend through the tight mode in top. The structure can meet the requirements of height adjustment and positioning of the telescopic rectangular pipe.

Further, the lower end of the lower rectangular pipe is arc-shaped. Therefore, when the fixed base rotates, the lower rectangular tube cannot influence the fixed base.

Furthermore, at least one mounting sleeve is sleeved on the upper rectangular tube and the lower rectangular tube, each mounting sleeve is provided with a positioning bolt which sequentially penetrates through the mounting sleeve and the upper rectangular tube or the lower rectangular tube, the tail end of each positioning bolt penetrates through the outside of the sliding chute, the positioning plate can circumferentially rotate by taking the positioning bolt as a center, a positioning nut which is in threaded fit with the positioning bolt is arranged on each positioning bolt and on the outer side of the positioning plate, and the positioning plate can be fixed on the upper rectangular tube or the lower rectangular tube by rotating the positioning nut; during specific operation, each mounting sleeve is adjusted in mounting height in a sliding mode, the mounting sleeves are fixed after sliding to corresponding positions, then the positioning plate is rotated, the positioning plate is inclined, and the inclined angle of the positioning plate is consistent with that of the guardrail cross rod. Therefore, the upper rectangular pipe and the lower rectangular pipe are respectively provided with at least one positioning plate and a cross rod supporting piece, so that at least one supporting point corresponding to the cross rod is provided, and the support of the upper position and the lower position is at least met. The positioning bolt not only can be used as a bolt to be matched with the positioning nut to fix the positioning plate, but also can play a role of a rotating shaft, so that the positioning plate can rotate under the support of the rotating shaft, and the angle adjustment of the positioning plate is realized.

Furthermore, the cross rod support piece comprises a support screw rod penetrating through the sliding groove, a rod piece clamping part used for being fixedly clamped with the cross rod of the guardrail is installed at the inner end of the support screw rod, and two locking nuts which are respectively arranged on the front side and the rear side of the positioning plate and used for fixing the support screw rod in the sliding groove are sleeved on the support screw rod. Like this, the screw rod can slide in spout length direction, simultaneously, can also fix the horizontal pole support piece on the locating plate with lock nut cooperation. And the member bar clamping part can clamp the guardrail cross bar, so that one end of the member bar clamping part is fixed with the cross bar, and the other end of the member bar clamping part is fixed on the positioning plate through the locking nut to form a support for the guardrail cross bar.

Furthermore, the rod piece clamping part comprises an installation piece fixedly installed at the inner end of the screw, the installation piece is vertically arranged, an arc-shaped clamping plate is respectively and rotatably installed at the upper end and the lower end of the installation piece, the two arc-shaped clamping plates are oppositely arranged and form a cylinder after being encircled with the installation piece; a fixing plate is fixed at the tail end of each arc-shaped clamping plate, and a corresponding through hole is formed in each fixing plate; the two fixing plates are matched and fixed together with the nut after penetrating through the through holes of the two fixing plates through a bolt. Like this, during the use, through pulling the installed part, make the one end of two installed parts open to effectively increase its centre gripping angle, place the guardrail horizontal pole in between the drum that two installed parts formed from the department of opening of two installed parts again, lock two installed parts through bolt and nut cooperation at last. Because can open and shut between the installed part, and then can satisfy the horizontal pole centre gripping demand of different diameters when the centre gripping for the member centre gripping does not have the commonality more.

Further, the specific sleeving method of the cross bar supporting piece and the guardrail cross bar is as follows: s1, inserting the support screw on the cross bar support into the slide groove on the positioning plate; s2, pulling the arc-shaped clamping plates respectively in the up-down direction to enable the arc-shaped clamping plates to be in an open state, enclosing a guardrail cross rod required to be sleeved in a space formed by the two arc-shaped clamping plates, pulling the two arc-shaped clamping plates towards the middle to enable the inner walls of the arc-shaped clamping plates to be attached to the guardrail cross rod, finally sleeving bolts on fixing plates of the two arc-shaped clamping plates, screwing the nuts after the nuts are sleeved at the tail ends of the bolts, fixing the arc-shaped clamping plates, and enabling the arc-shaped clamping plates and the guardrail cross rod to be in a clamping state. Like this, the mode of adoption centre gripping is fixed with horizontal pole and horizontal pole support piece, and it is comparatively convenient to operate, and this kind of mode has certain adjustability, makes its horizontal pole that adapts to multiple specification fixed. The arc-shaped clamping plate is opened in the fixing process, and then the fixing mode through the bolt and the nut is very convenient.

Compared with the prior art, the stair guardrail repairing method has the following advantages:

1. after erection bracing frame supports the horizontal pole before restoreing, can effectively guarantee the normal use of guardrail, can also form certain support to the guardrail, prevent that the guardrail from warping, simultaneously, can also restore at the guardrail and accomplish the back, support welding department before the pole setting concrete solidifies for the later stage guardrail has better steadiness.

2. The support frame of installing can adapt to different guardrail heights, different cutting width, to the support requirement of guardrail, supports the back to the guardrail, can keep the stationarity of guardrail, prevents to appear inclining in the repair process, influences the pleasing to the eye of later stage guardrail, can also prevent that the guardrail from empting the potential safety hazard that takes place simultaneously.

Drawings

FIG. 1 is a schematic view of an installation structure of a support frame and a guardrail cross bar before repair of a stair guardrail in the embodiment;

FIG. 2 is a schematic perspective view of the supporting frame in the embodiment;

FIG. 3 is an enlarged view of the mounting structure of the positioning plate and the cross bar support in the embodiment.

In the figure: the device comprises a fixed base 1, a square pipe 11, a backing plate 12, an expansion bolt 13, a hinge base 14, a telescopic rectangular pipe 2, a lower rectangular pipe 21, an upper rectangular pipe 22, a tightening bolt 23, a mounting sleeve 3, a positioning bolt 31, a positioning plate 4, a sliding groove 41, a cross rod support member 5, a supporting screw rod 51, a locking nut 52, a mounting member 53, an arc-shaped clamping plate 54, a fixing plate 55, a bolt 56, a nut 57, a cylinder 58, a cross rod 6 and a vertical rod 7.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

Example (b):

the stair guardrail repairing method provided by the embodiment comprises the following steps: s1, cutting the damaged cross bar 6 part and the damaged upright bar 7 part of each floor guardrail, and installing a support frame at the side end close to the cutting point of the stair guardrail to support the cutting and/or dismantling part of the guardrail before or after the cross bar of the stair guardrail is cut or the upright bar is dismantled; when the cross bars of the stair guardrail are cut, the cross bars of the guardrail need to be obliquely cut, and when the vertical rods are removed, the bases of the guardrail need to be removed together; s2, when the guardrail cross bars are cut and/or the vertical rods are dismantled, the number and the size of the cross bars 6 and the vertical rods 7 required to be repaired of the guardrails of each floor are synchronously recorded, and the cross bars 6 and the vertical rods 7 required to be repaired are individually customized to a factory in a list form; s3, conveying the cross bars and/or vertical bars prefabricated in each S2 factory to corresponding floors, installing support frames at corresponding cutting and/or dismantling positions, directly welding the cross bars to the corresponding cross bar cutting positions in a welding mode under the support frames of the support frames, and installing the vertical bars to the corresponding vertical bar dismantling positions; s4, after all the cross rods are welded and the upright rods are installed in place, grinding and polishing the welding positions of the cross rods; s5, after painting protection is carried out on the guardrail, concrete repair is carried out on the base of the upright rod; and S6, after the guardrail is stabilized, detaching the support frame.

In S1, when the cross bar is cut obliquely, the cutting angle is controlled to be 30-60 °, and the cutting angle of the present embodiment is 45 °. In addition, during cutting, the cutting is performed from the end close to the vertical rod to the end of the corrosion cross rod in an inclined mode (namely the vertical distance of the cutting positions of the two cross rods after cutting is larger than that of the cutting positions of the upper ends of the two cross rods), correspondingly, the side face of the prefabricated repairing cross rod is trapezoidal, therefore, the repairing cross rod can be directly placed on the two cross rods during fixed installation, additional supporting is not needed, and the operation is more convenient.

As shown in fig. 2 and 3, the support frame includes a fixed base 1 fixedly installed on the outer side of the stair step, a telescopic rectangular tube 2 is rotatably installed on the fixed base 1, a plurality of installation sleeves 3 are sleeved on the telescopic rectangular tube 2 at intervals, each installation sleeve 3 can slide up and down along the length direction of the telescopic rectangular tube 2 and is positioned, a positioning plate 4 capable of rotating circumferentially is installed on each installation sleeve 3 on the same side of each installation sleeve 3, the positioning plate 4 is a strip-shaped plate with a sliding groove 41 in the middle, at least one cross bar support member 5 with one end penetrating through the sliding groove 41 and the other end fixed with the cross bar of the guardrail through clamping is arranged in the sliding groove 41 of each positioning plate 4, and the cross bar support member 5 can slide along the length direction of the sliding groove 41 and move back and forth and back in the axial direction of the cross bar support member and is positioned; the concrete installation steps of the support frame and the guardrail cross rod are as follows: firstly, mounting a fixed base 1 at the side end of a stair, then adjusting the length of a telescopic rectangular tube 2 and the position of each mounting sleeve 3 to enable the telescopic rectangular tube to correspond to the height of a corresponding cross bar on a guardrail, and then fixing the telescopic rectangular tube and the mounting sleeves; after the installation sleeve 3 is fixed, the cross rod supporting piece 5 on one side of each installation sleeve 3 and the positioning plate 4 is fixed with the guardrail cross rod through clamping, and the guardrail cross rod is fixed through the cross rod supporting piece 5 and the telescopic rectangular tube 2.

The fixed base 1 comprises a square pipe 11 which is transversely arranged, two backing plates 12 are arranged on the inner side of the square pipe 11 at intervals, the upper end and the lower end of each backing plate 12 extend out of the square pipe 11, and the extending part of each backing plate 12 is provided with at least one expansion bolt 13 for fixing the expansion bolt on the side surface of the stair; a U-shaped hinge seat 14 is fixedly arranged at the upper end of the square tube 11 and in the width direction of the square tube, and the lower end of the telescopic rectangular tube 2 is rotatably arranged on the hinge seat 14 through a rotating shaft; when the fixing base 1 is installed, the fixing base 1 needs to be rotated firstly to be inclined and can be attached to the stair step side, and then the expansion bolt is installed in concrete of the stair step side.

The telescopic rectangular pipe 2 consists of an upper rectangular pipe 22 and a lower rectangular pipe 21, the upper rectangular pipe 22 is sleeved in the lower rectangular pipe 21, the lower end of the lower rectangular pipe 21 is arc-shaped, the upper end of the lower rectangular pipe 21 is provided with a threaded hole, and a tightening bolt 23 for fixing the upper rectangular pipe in the lower rectangular pipe is sleeved on the threaded hole; when the telescopic supporting pipe is adjusted, the extending height of the upper rectangular pipe is required to be adjusted according to the height of the guardrail to be maintained, and the upper rectangular pipe is fixed on the lower rectangular pipe in a manner of rotating the puller bolt after the adjustment is finished.

At least one mounting sleeve 3 is sleeved on the upper rectangular tube 22 and the lower rectangular tube 21, each mounting sleeve 3 is provided with a positioning bolt 31 which sequentially penetrates through the mounting sleeve 3 and the upper rectangular tube 22 or the lower rectangular tube 21, the tail end of each positioning bolt 31 penetrates through the outside of the sliding groove 41, the positioning plate 4 can circumferentially rotate by taking the positioning bolt 31 as a center, a positioning nut which is in threaded fit with the positioning bolt 31 is arranged on each positioning bolt 31 and on the outer side of the positioning plate 4, and the positioning plate can be fixed on the upper rectangular tube or the lower rectangular tube by rotating the positioning nut; during the concrete operation, each installation cover 3 carries out the regulation of mounting height through gliding mode to sliding the fixed mounting cover behind the relevant position, then rotating locating plate 4, making locating plate 4 be the slope form, and the angle of slope is unanimous with the inclination of guardrail horizontal pole.

The cross bar supporting piece 5 comprises a supporting screw rod 51 penetrating through the sliding groove 41, a rod piece clamping part used for being fixedly clamped with the cross bar of the guardrail is arranged at the inner end of the supporting screw rod 51, and two locking nuts 52 which are respectively arranged on the front side and the rear side of the positioning plate and used for fixing the screw rod in the sliding groove 41 are sleeved on the supporting screw rod 51.

The rod clamping part comprises a mounting piece 53 fixedly mounted at the inner end of the screw, the mounting piece 53 is vertically arranged, an arc-shaped clamping plate 54 is respectively and rotatably mounted at the upper end and the lower end of the mounting piece 53, the two arc-shaped clamping plates 54 are oppositely arranged and form a cylinder 58 after being surrounded by the mounting piece 53; a fixing plate 55 is fixed at the tail end of each arc-shaped clamping plate 54, and a corresponding through hole is formed in each fixing plate 55; the two fixing plates 55 are fixed together by a bolt 56 passing through the through hole and then being engaged with a nut 57.

The specific sleeving method of the cross bar supporting piece 5 and the guardrail cross bar is as follows: s1, inserting the support screw on the cross bar support into the slide groove on the positioning plate; s2, the arc-shaped clamping plates 54 are respectively pulled in the up-down direction to enable the arc-shaped clamping plates 54 to be opened, the guardrail cross bar required to be sleeved is surrounded in a space formed by the two arc-shaped clamping plates 54, then the two arc-shaped clamping plates 54 are pulled towards the middle to enable the inner walls of the arc-shaped clamping plates 54 to be attached to the guardrail cross bar, finally, the bolts 56 are sleeved on the fixing plates of the two arc-shaped clamping plates 54, the nuts 57 are sleeved at the tail ends of the bolts and then the nuts are screwed, the arc-shaped clamping plates are fixed, and the arc-shaped clamping plates and the guardrail cross bar are in a clamping state.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the present invention has been described in detail by referring to the preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention can be made without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.

Claims

1. A stair guardrail repairing method is characterized by comprising the following steps: s1, cutting the damaged cross bar (6) part and the damaged upright bar (7) part of each floor guardrail, and installing a support frame at the side end close to the cutting point of the stair guardrail to support the cutting and/or dismantling part of the guardrail before or after the cross bar of the stair guardrail is cut or the upright bar is dismantled; when the cross bars of the stair guardrail are cut, the cross bars of the guardrail need to be obliquely cut, and when the vertical rods are removed, the bases of the guardrail need to be removed together; the support frame comprises a fixed base (1) fixedly installed on the outer side of the stair step, a telescopic rectangular tube (2) is rotatably installed on the fixed base (1), a plurality of installation sleeves (3) are arranged on the telescopic rectangular tube (2) in a spaced manner, each installation sleeve (3) can slide up and down along the length direction of the telescopic rectangular tube (2) and is positioned, a positioning plate (4) capable of rotating in the circumferential direction is installed on each installation sleeve (3) on the same side of each installation sleeve (3), the positioning plate (4) is a strip-shaped plate with a sliding groove (41) in the middle, at least one transverse rod supporting piece (5) is arranged on the sliding groove (41) side of each positioning plate (4), one end of each transverse rod supporting piece (5) penetrates through the sliding groove (41) and is connected with the positioning plate, and the other end of each transverse rod supporting piece can be buckled with the transverse rod of the guardrail, the cross bar supporting piece (5) can slide along the length direction of the sliding groove (41) and moves back and forth and is positioned in the axial direction of the cross bar supporting piece; s2, when the guardrail cross bars are cut and/or the vertical rods are dismantled, the number and the size of the cross bars (6) and the vertical rods (7) required to be repaired of the guardrails of all floors are synchronously recorded, and the cross bars (6) and the vertical rods (7) required to be repaired are individually customized to a factory in a list form; s3, conveying the cross bars and/or vertical bars prefabricated in each S2 factory to corresponding floors, installing support frames at corresponding cutting and/or dismantling positions, directly welding the cross bars to the corresponding cross bar cutting positions in a welding mode under the support frames of the support frames, and installing the vertical bars to the corresponding vertical bar dismantling positions; s4, after all the cross rods are welded and the upright rods are installed in place, grinding and polishing the welding positions of the cross rods; s5, after painting protection is carried out on the guardrail, concrete repair is carried out on the base of the upright rod; and S6, after the guardrail is stabilized, detaching the support frame.

2. The stair guardrail repairing method according to claim 1, wherein the steps of installing the support frame and the cross bar of the stair guardrail are as follows: the method comprises the following steps of firstly installing a fixed base (1) at the side end of a stair, then adjusting the length of a telescopic rectangular tube (2) and the position of each installation sleeve (3) to enable the telescopic rectangular tube to correspond to the height of a corresponding cross rod on a guardrail, and then fixing the telescopic rectangular tube and the installation sleeves; after the installation sleeves (3) are fixed, the cross rod supporting piece (5) on one side of each installation sleeve (3) and the positioning plate (4) and the guardrail cross rod are fixed through clamping, and the guardrail cross rod is fixed through the cross rod supporting piece (5) and the telescopic rectangular pipes (2).

3. The stair guardrail repairing method according to claim 2, wherein the fixed base (1) comprises a square tube (11) transversely arranged, two base plates (12) are arranged at intervals on the inner side of the square tube (11), the upper end and the lower end of each base plate (12) extend out of the square tube (11), and at least one expansion bolt (13) for fixing the base plate on the side surface of the stair is arranged on the extending part of each base plate (12); a U-shaped hinge seat (14) is fixedly arranged at the upper end of the square pipe (11) in the width direction of the square pipe, and the lower end of the telescopic rectangular pipe (2) is rotatably arranged on the hinge seat (14) through a rotating shaft; when the fixing base (1) is installed, the fixing base (1) needs to be rotated firstly to be inclined and can be attached to the stair step side, and then the expansion bolt is installed in concrete of the stair step side.

4. The stair guardrail repairing method according to claim 2, wherein the telescopic rectangular pipe (2) consists of an upper rectangular pipe (22) and a lower rectangular pipe (21), the upper rectangular pipe (22) is sleeved in the lower rectangular pipe (21), a threaded hole is formed in the upper end of the lower rectangular pipe (21), and a tightening bolt (23) for fixing the upper rectangular pipe in the lower rectangular pipe is sleeved on the threaded hole; when the telescopic supporting pipe is adjusted, the extending height of the upper rectangular pipe is required to be adjusted according to the height of the guardrail to be maintained, and the upper rectangular pipe is fixed on the lower rectangular pipe in a manner of rotating the puller bolt after the adjustment is finished.

5. The stair railing repair method according to claim 4, characterised in that the lower end of the lower rectangular tube (21) is curved.

6. The stair guardrail repairing method according to claim 4, wherein at least one mounting sleeve (3) is sleeved on the upper rectangular tube (22) and the lower rectangular tube (21), each mounting sleeve (3) is provided with a positioning bolt (31) which sequentially penetrates through the mounting sleeve (3) and the upper rectangular tube (22) or the lower rectangular tube (21), the tail end of each positioning bolt passes through the outside of the sliding groove (41), the positioning plate (4) can circumferentially rotate by taking the positioning bolt (31) as a center, a positioning nut (32) which is in threaded fit with the positioning bolt (31) is arranged on each positioning bolt (31) and on the outer side of the positioning plate (4), and the positioning plate can be fixed on the upper rectangular tube or the lower rectangular tube by rotating the positioning nut; during the concrete operation, each mounting sleeve (3) carries out the regulation of mounting height through gliding mode to fixing the mounting sleeve after sliding to relevant position, then rotating locating plate (4), make locating plate (4) be the slope form, and the angle of slope is unanimous with the inclination of guardrail horizontal pole.

7. The stair guardrail repairing method according to claim 2, wherein the cross bar supporting member (5) comprises a supporting screw rod (51) penetrating through the sliding groove (41), a rod member clamping part for clamping and fixing the guardrail cross bar is installed at the inner end of the supporting screw rod (51), and two locking nuts (52) respectively arranged at the front side and the rear side of the positioning plate and used for fixing the screw rod in the sliding groove (41) are sleeved on the supporting screw rod (51).

8. The stair guardrail repairing method according to claim 7, wherein the rod clamping part comprises a mounting part (53) fixedly mounted at the inner end of the screw rod, the mounting part (53) is vertically arranged, an arc-shaped clamping plate (54) is respectively and rotatably mounted at the upper end and the lower end of the mounting part (53), the two arc-shaped clamping plates (54) are oppositely arranged and form a cylinder (58) after being surrounded with the mounting part (53); a fixing plate (55) is fixed at the tail end of each arc-shaped clamping plate (54), and a corresponding through hole is formed in each fixing plate (55); the two fixing plates (55) are matched and fixed together with a nut (57) after passing through the through holes of the two fixing plates through a bolt (56).

9. The stair railing repair method according to claim 8, wherein the specific nesting method of the rail support (5) with the rail of the stair railing is as follows: s1, inserting the support screw on the cross bar support into the slide groove on the positioning plate; s2, the arc-shaped clamping plates (54) are pulled in the up-down direction respectively to enable the arc-shaped clamping plates (54) to be opened, the guardrail cross bars required to be sleeved are surrounded in the space formed by the two arc-shaped clamping plates (54), then the two arc-shaped clamping plates (54) are pulled towards the middle to enable the inner walls of the arc-shaped clamping plates (54) to be attached to the guardrail cross bars, finally the bolts (56) are sleeved on the fixing plates of the two arc-shaped clamping plates (54), the nuts (57) are sleeved at the tail ends of the bolts and then the nuts are screwed, the arc-shaped clamping plates are fixed, and the arc-shaped clamping plates and the guardrail cross bars are in a clamping state.