KR102609483B1 - Access ladder for bridge inspection with stress distribution reinforcement structure - Google Patents

Abstract

The present invention distributes stress to the connection parts installed on the side of the bridge for maintenance and inspection of the bridge, so as to effectively prevent deformation of the product due to shear resistance, so that the upper plate on the top of the bridge or the side of the protective wall is provided. In the bridge inspection access ladder that is fixedly installed and installed so that the lower part is connected to the bridge inspection road on the side of the bridge, it has a support end fixedly installed facing the bridge, and a connection end extending in a direction perpendicular to the support end. A fixing bracket and; A pair of main supports installed facing the connection end of the fixing bracket and spaced left and right, but extending in the vertical direction, and a pair of main supports connected laterally and extending in the longitudinal direction of the main supports. A ladder assembly including step bars arranged at intervals; A fall prevention stand disposed at vertical intervals corresponding to the ladder assembly, with both ends connected on the main support, and having a curved shape convex outward to secure a space for workers to move in response to the ladder assembly; It includes a fixing means for fastening and fixing the fixing bracket, the ladder assembly, and the fall arrester, and the fixing bracket, the ladder assembly, and the fall arrester are formed in a concavo-convex shape at connection points where surfaces contact each other, so that they engage with each other. Provides an access ladder for bridge inspection having a stress distribution reinforcement structure including a stress distribution part that can be configured.

Description

Access ladder for bridge inspection with stress distribution reinforcement structure}

The present invention relates to an access ladder for bridge inspection having a stress distribution reinforcement structure. More specifically, the present invention relates to an access ladder for bridge inspection, etc., which distributes stress to the connection part installed on the side of the bridge for maintenance and inspection work of the bridge, thereby improving the product according to shear resistance. This relates to an access ladder for bridge inspection that has a stress distribution reinforcement structure that can effectively prevent deformation.

In general, various types of bridges are installed to build highways, national highways, and roads crossing rivers or the sea. For these bridges, there is a bridge inspection road ('bridge inspection stand' and 'bridge inspection facility') where the main structure can be inspected at all times without restrictions on traffic flow, taking into account all conditions such as construction location, structural type, crossing conditions, and lower support conditions. ') is being installed.

In order to access such a bridge inspection road, a normal access ladder is installed to provide access. The access ladder extends the road surface from the outside of the protective wall of the upper road structure that forms the road surface of the bridge to the bridge inspection road formed on the side of the coping. It is installed to extend vertically downward.

As a prior art disclosed in relation to an access ladder installed to access the bridge inspection road as described above, Registered Patent Publication No. 361604 (2002.11.06.) has a number of steps and is approximately U-shaped in a certain part. In constructing a bridge inspection ladder in which a ladder is fixed to the outer wall of the bridge railing with upper and lower brackets while forming a protective net, a guide pipe of a certain length is attached to each of the brackets, and the guide pipe has an outer surface of approximately By inserting and installing the slide pipe of the protective gear main body, which forms a protective gear formed of a U-shaped protective net, and connecting the wire of the lifting means to the brace at the bottom of the protective gear body, the protective gear is raised and lowered to a certain extent on the outer surface of the ladder. A bridge inspection ladder with elevating protection equipment is designed so that workers can work in a safer and more psychologically stable state while climbing over the bridge railing and using the ladder, thereby preventing the occurrence of safety accidents. It is known.

In addition, Registered Utility Model Publication No. 360006 (August 16, 2004) describes a ladder for bridge inspection, wherein the ladder for bridge inspection is composed of an entrance door part and a lifting ladder part, and the lifting ladder part is provided with a downward ladder, It is connected to an entrance door on both sides of the upper part, and the entrance door is composed of a side part that is a fan-shaped structure on the left and right sides, and a blocking upper surface joined to the side parts of the left and right sides, and the fan-shaped arc part of the side part has a circular arc. It is provided as a bar upper body, and the blocking upper surface is composed of a plurality of longitudinal blocking bars and a rotating axis on two horizontal blocking bars, and the side part and the blocking upper surface are configured to be integrally combined to prevent the occurrence of dangerous accidents such as falls. There is a known bridge inspection ladder that can prevent this.

In addition, Registered Patent Publication No. 1182207 (2012.09.06.) states that in constructing an access ladder for bridge inspection, which is installed so that the lower part is connected from the protective wall on the side of the bridge deck to the safety railing next to the lower pier, the worker basically has to climb up. The ladder stairs are coupled and fixed to the protective wall so that they can be lowered, and are integrally coupled in the longitudinal direction to the fixed longitudinal part that forms the moving space of the handrail ladder together with the space protrusion and space transverse part, and are folded and stored into the moving space of the handrail ladder in normal times, but are stored folded into the moving space of the handrail ladder when used. A ladder step that unfolds toward the ladder entrance of the protective wall so that workers can step on it and enter and exit the ladder step safely is hinged to the upper part of the ladder step where the ladder entrance is located so that it can be folded, and when used, the ladder step is unfolded and used. A ladder cover with a protruding locking protrusion is hinged to the top of the space protrusion on the upper side of the moving space of the handrail ladder to allow workers to enter and exit by opening upward to allow workers to enter and exit, but is normally closed in the opposite direction so that outsiders cannot enter. The locking protrusion is bent at a right angle and protrudes so that it can be locked while blocking the entrance to the ladder of the protective wall together with the ladder step to prevent entry and exit during normal times when it is not in use. A locking handle is installed along with the locking handle of the ladder step, and when in use, the locking protrusion is fixed upwards. The rotation stopper is connected to the cover support piece located between both rotation hinges on the top of the space protrusion so that it can be rotated at an angle and fixed, thereby structurally reducing the psychological anxiety of maintenance inspectors and the possibility of safety accidents. An access ladder for bridge inspection with a safe structure is known.

However, the above-described prior technologies are fixed and installed on the deck or protective wall of a bridge with a fixing bracket (bracket, fixing bar, fixing piece), and the support of the access ladder is fixed to the fixing bracket only by fixing means such as a plurality of conventional bolts. Therefore, whenever a continuous load is applied, shear resistance acts directly and intensively on the cross section of the bolt, causing deflection or clearance due to loss of section and assembly tolerance, and the resulting product deformation makes it difficult to secure the stability of the designed product. There was.

KR Registered Patent Publication No. 10-0361604 (2002.11.06.) KR Registered Utility Model Bulletin No. 20-0360006 (2004.08.16.) KR Registered Patent Publication No. 10-1182207 (2012.09.06.)

The present invention is intended to solve the above problems, and is configured to distribute the stress of moment friction resistance by engaging the uneven surface and then bolting between the fixing bracket installed on the deck of the bridge or the protective wall and the support of the access ladder. The purpose is to provide an access ladder for bridge inspection that has a stress distribution reinforcement structure that can secure the designed stability while reinforcing the connection strength of the access ladder.

The bridge inspection access ladder having a stress distribution reinforcement structure proposed by the present invention is installed with the upper part fixed to the deck of the bridge or the side of the protective wall, but the lower part is installed connected to the bridge inspection road on the side of the bridge. In the access ladder for bridge inspection, a fixing bracket forming a support end fixedly installed facing the bridge and having a connection end extending in a direction perpendicular to the support end; A pair of main supports installed facing the connection end of the fixing bracket and spaced left and right, but extending in the vertical direction, and a pair of main supports connected laterally and extending in the longitudinal direction of the main supports. A ladder assembly including step bars arranged at intervals; A fall prevention stand disposed at vertical intervals corresponding to the ladder assembly, with both ends connected on the main support, and having a curved shape convex outward to secure a space for workers to move in response to the ladder assembly; It includes a fixing means for fastening and fixing the fixing bracket, the ladder assembly, and the fall arrester, and the fixing bracket, the ladder assembly, and the fall arrester are formed in a concavo-convex shape at connection points where surfaces contact each other, so that they engage with each other. It is made up of a possible stress distribution unit.

The main support of the ladder assembly includes an extension support piece that extends to one side corresponding to the fall prevention bar and is capable of supporting the fixing bracket and the fall prevention bar while facing both sides.

The stress distribution unit includes a first stress distribution unit formed on both surfaces of the main support of the ladder assembly corresponding to the fixing bracket and the fall prevention bar, and a first stress distribution part formed on one surface of the fixing bracket corresponding to the main support of the ladder assembly. A second stress distribution unit configured to be capable of engaging and assembling the first stress distribution unit, and a second stress distribution unit formed on one side of the fall prevention stand corresponding to the main support of the ladder assembly to enable engagement and assembly with the first stress distribution unit. It is provided with a third stress distribution unit.

In addition, in the present invention, the reinforcing uneven parts in the form of uneven surfaces that are respectively disposed between the fixing brackets and the fall prevention bars based on the main support of the ladder assembly and can be engaged and connected to the stress distribution parts are provided on both sides. It is also possible to further include a stress distribution reinforcement piece.

The reinforcing uneven portion is assembled to face the main support, but is assembled to face the main support, and the vertical reinforcing uneven portion is configured by applying uneven protrusions extending in the vertical and vertical directions, and is assembled to face the fixing bracket or the fall prevention pole, but extends in the left and right transverse directions. It is provided with a horizontal reinforcing uneven portion formed by applying the formed uneven protrusions.

The second stress distribution unit and the third stress distribution unit are each configured by applying concave-convex protrusions extending in the transverse direction to enable engaging connection while facing the horizontal reinforcing concavo-convex portions among the reinforcing concavo-convex portions of the stress dispersion reinforcement piece.

According to the bridge inspection access ladder having a stress distribution reinforcement structure according to the present invention, the fixing brackets facing each side on both sides based on the main support of the ladder assembly and the connection point with the fall prevention pole are combined as fixing means and have an uneven shape. Since it is configured to be interlocked with each other, it basically achieves excellent constructability and durability, and by dispersing stress by changing the direction of force according to moment friction resistance, it has the effect of securing the structural stability as designed.

1 is an installation configuration diagram showing one embodiment according to the present invention.
Figure 2 is a front view showing one embodiment according to the present invention.
Figure 3 is a plan view showing one embodiment according to the present invention.
Figure 4 is an enlarged cross-sectional view showing the first embodiment of the stress distribution unit in one embodiment according to the present invention.
Figure 5 is an exploded cross-sectional view showing a first embodiment of the stress distribution unit in one embodiment according to the present invention.
Figure 6 is an enlarged cross-sectional view showing a second embodiment of the stress distribution unit in one embodiment according to the present invention.
Figure 7 is an exploded cross-sectional view showing a second embodiment of the stress distribution unit in one embodiment according to the present invention.
Figure 8 is a perspective view showing a stress distribution reinforcement piece in one embodiment according to the present invention.

The present invention relates to an access ladder for bridge inspection, the upper part of which is fixedly installed on the deck of a bridge or the side of a protective wall, and the lower part of which is connected to the bridge inspection road on the side of the bridge, and a support end that is fixedly installed facing the bridge is formed, a fixing bracket having a connection end extending in a direction perpendicular to the support end; A pair of main supports installed facing the connection end of the fixing bracket and spaced left and right, but extending in the vertical direction, and a pair of main supports connected laterally and extending in the longitudinal direction of the main supports. A ladder assembly including step bars arranged at intervals; A fall prevention stand disposed at vertical intervals corresponding to the ladder assembly, with both ends connected on the main support, and having a curved shape convex outward to secure a space for workers to move in response to the ladder assembly; It includes a fixing means for fastening and fixing the fixing bracket, the ladder assembly, and the fall arrester, and the fixing bracket, the ladder assembly, and the fall arrester are formed in a concavo-convex shape at connection points where surfaces contact each other, so that they engage with each other. The technical configuration features an access ladder for bridge inspection having a stress distribution reinforcement structure including a stress distribution part that can be configured.

Next, a preferred embodiment of an access ladder for bridge inspection having a stress distribution reinforcement structure according to the present invention will be described in detail with reference to the drawings.

First, an embodiment of the bridge inspection access ladder having a stress distribution reinforcement structure according to the present invention is, as shown in FIG. 1, the upper part is fixed and installed on the side of the top plate 5 or the protective wall 7 of the bridge 1. In the access ladder for bridge inspection, which is installed with the lower part connected to the bridge inspection road on the side of the bridge, a fixing bracket (10), a ladder assembly (20), a fall prevention bar (30), a fixing means (40), and stress It includes a dispersion unit 50.

As shown in FIG. 1, the fixing bracket 10 is the overall structure of the present invention, including the ladder assembly 20 and the fall prevention platform 30, is the upper plate 5 or the protective wall 7 of the bridge 1. ) and secure it so that it can be installed on the side.

The fixing brackets 10 are configured symmetrically at left and right intervals corresponding to the sides of the upper plate 5 or the protective wall 7 of the bridge 1, and are configured by applying at least two pairs at upper and lower intervals.

The fixing bracket 10 has an 'ㄱ' cross-sectional shape and is bent and extended at a right angle, and includes a support end 11 that faces the bridge 1 and is fixed with an anchor bolt B, It is configured to be provided with a connection end 13 extending in a direction perpendicular to the support end 11.

The ladder assembly 20 forms a movement path extending vertically up and down from the top plate 5 or the protective wall 7 of the bridge 1 toward the bridge inspection road, allowing workers to go up and down.

As shown in FIGS. 1 and 2, the ladder assembly 20 is installed facing the connecting end 13 of the fixing bracket 10 and is arranged at left and right intervals, but is a pair of pairs extending in the vertical and vertical directions. It constitutes a main support 21 and a step bar 23 that connects the pair of main supports 21 in the transverse direction and is arranged at intervals in the longitudinal direction of the main support 21.

The main support 21 is installed on the fixing bracket 10 and is arranged so that the fixing bracket 10 and the fall prevention stand 30 can be connected.

The main support 21 includes an extension support piece 22 that faces the fixing bracket 10 and extends to one side corresponding to the fall prevention support 30.

As shown in FIG. 3, the extension support piece 22 is formed to support the fixing bracket 10 and the fall prevention bar 30 while facing each other on both sides. That is, the main support 21 is supported in contact with the connecting end 13 of the fixing bracket 10, and the main support 21 is fixed with the extension support piece 22 as the reference. It is configured to be supported in contact by facing at a right angle to the opposite side of the contact surface with the bracket 10.

The fall prevention stand 30 functions to prevent the worker from falling while moving up and down while securing space for the worker to move in response to the ladder assembly 20.

As shown in FIGS. 1 and 2, the fall arresters 30 are arranged at vertical intervals corresponding to the ladder assembly 20, and the plurality of fall arresters 30 are provided with connection bars connected in the vertical direction (up and down). 35).

As shown in FIG. 3, the fall arrester 30 is installed by connecting both ends on the main support 21, and is configured to form a curved shape that is convex outward with respect to the ladder assembly 20.

The fixing means 40 fastens and secures the fixing bracket 10, the ladder assembly 20, and the fall prevention stand 30. At this time, the fixing means 40 includes the fixing bracket 10 and the fall prevention device arranged to face each other on both sides corresponding to the extension support piece 22 of the main support 21 of the ladder assembly 20 ( 30) and fasten it all together.

The stress distribution unit 50 is connected between the fixing bracket 10, the ladder assembly 20, and the fall prevention stand 30, and distributes stress by changing the direction of the force applied to the fixing means 40. It performs the function it is instructed to do.

The stress distribution portion 50 is formed on the fixing bracket 10, the ladder assembly 20, and the fall prevention stand 30, and is formed in a concavo-convex shape at connection points that are in surface contact with each other to enable interlocking connection. Compose.

As shown in FIGS. 4 and 5, the stress distribution unit 50 is a concavo-convex structure in which protrusions and grooves are repeatedly formed, and is a first stress distribution unit formed on the main support 21 of the ladder assembly 20 ( 50a), a second stress distribution part 50b formed on the fixing bracket 10, and a third stress distribution part 50c formed on the fall prevention zone 30.

The first stress distribution portion 50a is formed repeatedly on both sides of the main support 21 corresponding to the fixing bracket 10 and the fall prevention band 30, and the second stress distribution portion 50b ) is formed on one surface of the fixing bracket 10 corresponding to the main support 21 to enable assembly with the first stress distribution part 50a, and the third stress distribution part 50c is the first stress distribution part 50a. The fall prevention platform 30 is formed on one surface corresponding to the main support 21 to enable assembly and engagement with the first stress distribution portion 50a. That is, the stress distribution unit 50 is configured to be assembled by engaging the second stress distribution unit 50b and the third stress distribution unit 50c on both sides of the first stress distribution unit 50a.

In addition, as shown in FIGS. 6 and 7, the stress distribution unit 50 is connected to the fixing bracket 10 and the fall prevention bar 30 based on the main support 21 of the ladder assembly 20. It is also possible to further include stress dispersion reinforcement pieces 60 disposed between the corresponding parts.

The stress distribution reinforcement piece 60 is located between the main support 21 and the fixing bracket 10 or between the main support 21 and the fall prevention bar 30, respectively, and the stress distribution portion ( 50) That is, an uneven shape that can be engaged and connected by facing the first stress distribution unit (50a) and the second stress distribution unit (50b) or the first stress distribution unit (50a) and the third stress distribution unit (50c). Reinforcing uneven portions 65 are formed on both sides.

The reinforcing uneven portion 65 has protrusions and grooves repeatedly formed on the stress distribution reinforcing piece 60, and both sides extend in different directions. That is, as shown in FIGS. 7 and 8, the reinforcing uneven portion 65 is assembled facing the main support 21 and is configured by applying uneven protrusions extending in the vertical direction up and down (65a). ) and a horizontal reinforcing uneven portion 65b that is assembled facing the fixing bracket 10 or the fall prevention stand 30 and is configured by applying uneven protrusions extending in the left and right transverse directions.

At this time, among the stress distribution units 50, the second stress distribution unit 50b formed on the fixing bracket 10 and the third stress distribution unit 50c formed on the fall prevention zone 30 are each Among the reinforcing uneven portions 65 of the stress distribution reinforcement piece 60, when facing the horizontal reinforcing uneven portion 65b, a concave-convex protrusion extending in the transverse direction is applied to enable engaging connection with the horizontal reinforcing uneven portion 65b. It is composed by:

When the stress distribution unit 50 is formed by applying the stress distribution reinforcement piece 60 as described above, it is possible to improve design stability by distributing stress in multiple directions while improving the bonding durability between components.

That is, according to the bridge inspection access ladder having the stress distribution reinforcement structure according to the present invention configured as described above, the fixing brackets facing each side on both sides with respect to the main support of the ladder assembly and the fixing means at the connection point with the fall prevention bar. It is not only connected but also interlocked in a concavo-convex shape, so it basically achieves excellent constructability and durability, and secures the structural stability as designed by dispersing stress by changing the direction of force according to moment friction resistance. possible.

In the above, a preferred embodiment of the bridge inspection access ladder having a stress distribution reinforcement structure according to the present invention has been described, but the present invention is not limited thereto, and various modifications are made within the scope of the claims, the specification of the invention, and the accompanying drawings. It is possible to modify and implement it, and this also falls within the scope of the present invention.

10: fixing bracket 11: support end
13: connection end 20: ladder assembly
21: main support 22: extension support
23: Step bar 30: Fall prevention bar
35: connecting rod 40: fixing means
50: stress distribution unit 50a: first stress distribution unit
50b: second stress distribution unit 50c: third stress distribution unit
60: Stress distribution reinforcement piece 65: Reinforcement uneven portion
65a: Vertical reinforcing uneven part 65b: Horizontal reinforcing uneven part

Claims (6)

In the access ladder for bridge inspection, the upper part is fixedly installed on the side of the deck or protective wall of the bridge, but the lower part is installed connected to the bridge inspection road on the side of the bridge,
a fixing bracket forming a support end fixedly installed facing the bridge and having a connection end extending in a direction perpendicular to the support end;
A pair of main supports installed facing the connection end of the fixing bracket and spaced left and right, but extending in the vertical direction, and a pair of main supports connected laterally and extending in the longitudinal direction of the main supports. A ladder assembly including step bars arranged at intervals;
A fall prevention stand disposed at vertical intervals corresponding to the ladder assembly, with both ends connected on the main support, and having a curved shape convex outward to secure a space for workers to move in response to the ladder assembly;
Includes; fixing means for fastening and fixing the fixing bracket, the ladder assembly, and the fall prevention bar;
The fixing bracket, the ladder assembly, and the fall prevention device include a stress distribution portion formed in an uneven shape at a connection point where surfaces are in contact with each other to enable interlocking connection,
The main support of the ladder assembly has a stress distribution reinforcement structure including an extension support piece that extends to one side corresponding to the fall prevention bar and is capable of supporting the fixing bracket and the fall prevention bar while facing both sides. An access ladder for bridge inspection.
delete In claim 1,
The stress distribution unit includes a first stress distribution unit formed on both surfaces of the main support of the ladder assembly corresponding to the fixing bracket and the fall prevention bar, and a first stress distribution part formed on one surface of the fixing bracket corresponding to the main support of the ladder assembly. A second stress distribution unit configured to be capable of engaging and assembling the first stress distribution unit, and a second stress distribution unit formed on one side of the fall prevention stand corresponding to the main support of the ladder assembly to enable engagement and assembly with the first stress distribution unit. An access ladder for bridge inspection having a stress distribution reinforcement structure including a third stress distribution unit.
In claim 3,
Stress distribution reinforcement is disposed between the fixing brackets and the fall prevention bar based on the main support of the ladder assembly, and forms uneven reinforcing uneven parts on both sides that face the stress distributing parts and can be engaged and connected. An access ladder for bridge inspection having a stress distribution reinforcement structure further including a section.
In claim 4,
The reinforcing uneven portion is assembled to face the main support, but is assembled to face the main support, and the vertical reinforcing uneven portion is configured by applying uneven protrusions extending in the vertical and vertical directions, and is assembled to face the fixing bracket or the fall prevention pole, but extends in the left and right transverse directions. An access ladder for bridge inspection having a stress dispersion reinforcement structure including horizontal reinforcing irregularities formed by applying uneven protrusions.
In claim 5,
The second stress distribution unit and the third stress distribution unit are stress distribution units configured by applying concave-convex protrusions extending in the transverse direction to enable engagement and connection while facing the horizontal reinforcing concave-convex portions among the reinforcing concavo-convex portions of the stress distribution reinforcement piece. An access ladder for bridge inspection with a reinforced structure.

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