JP2019206872A - Fiber reinforced resin corridor - Google Patents

Abstract

To further improve safety in fiber reinforced resin corridors.SOLUTION: A fiber reinforced resin corridor comprises: a main girder 1; braces 2 standing on both sides of the main girder 1; and handrails 3 attached to the braces 2. The main girder 1, the braces 2, and the handrails 3 are respectively comprised of members having an L-shaped cross section in the fiber reinforced resin corridor formed of fiber reinforced resin. By providing a brace support member 4 that is abutted and fixed to a side face of the main girder 1 at a position adjacent to each brace 2 and abutted and fixed to a side face of the lower end of the brace 2, stress generated in the braces 2 and the main girder 1 is dispersed when a supposed impact load, for when a worker working on the corridor falls, is applied to the brace 2 via the handrail 3. Thus, it is made possible to suppress the occurrence of cracks in a part where the brace 2 and the main girder 1 are fixed to each other.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a fiber reinforced resin walkway used for inspection roads and the like for performing maintenance and inspection of bridges.

  Highway and railway bridges are generally provided with inspection paths for periodic inspections and repairs of damaged parts. Many of the walkways that make up this inspection path have been made of steel in the past, but in recent years, the weight can be significantly reduced compared to that of steel, making installation work easier and even without surface treatment. Products made of fiber reinforced resin (FRP) that can ensure durability and corrosion resistance have been used.

  The fiber reinforced resin walkway (hereinafter also referred to as “FRP walkway”) as described above is usually a main girder, pillars erected at a plurality of positions in the longitudinal direction of the main girder, and the longitudinal direction of the main girder. The main girder, the column, and the handrail are each formed of FRP (see, for example, Patent Document 1).

  For example, the FRP walkway (bridge inspection road structure) disclosed in Patent Document 1 has a back plate, a front plate, left and right profiles, and a central profile whose main girders (deck plates) are each formed of FRP. The bottom end of the FRP column is fixed to the side of the main girder (left and right profile) with bolts and nuts, and three columns are placed on the column aligned in the longitudinal direction of the main girder. A handrail made of FRP is attached.

Utility Model Registration No. 3128947

  The FRP corridor as described above has many advantages over the steel one as described above, but it is necessary to ensure the same safety as that of the steel one in use. In particular, regarding the safety of a worker who performs an inspection or repair work on a walkway, the safety is often confirmed by a static loading test and an impact test of a handrail. The impact test of the handrail is performed by a method in which a weight corresponding to the weight of the handrail is connected to the handrail with a safety belt and is allowed to fall freely, assuming that the worker falls.

  However, in the above-mentioned impact test, if the dropped weight does not reach the floor, it is accepted, so in the accepted corridor, there is a crack in the part where the column and main girder are fixed to each other due to the impact of the weight falling. Some have occurred. Also, in the FRP corridor in which the main girder is a hollow member and the longitudinal ribs are provided inside the main girder, the side surface inside the main girder is fixed at the part fixed to the base on the lower side of the main girder during the impact test. Cracks may occur in the corner portion between the bottom surface and the corner portion between the bottom surface inside the main girder and the rib side surface.

  For this reason, there is no risk of accidents even if the operator actually falls after the corridor is installed, but in that case the corridor will be replaced, and the cost and time required for this replacement work will be significant. Become.

  Then, this invention makes it a subject to improve the safety | security in a fiber reinforced resin walkway further.

  In order to solve the above-described problem, the first invention of the present application is directed to the main girder, the support columns erected at a plurality of positions in the longitudinal direction of the main girder, and the support columns extending in the longitudinal direction of the main girder. In a fiber reinforced resin walkway in which the strut is fixed to a side surface of the main girder, and at least the main girder and the strut are made of fiber reinforced resin. A configuration is adopted in which a column support member fixed to the main beam and fixed to the side surface of the column is provided.

  That is, by providing a column support member fixed to both the main beam and the column at a position adjacent to the column of the main beam made of FRP, an impact load assumed when the operator falls is applied to the column via the handrail. In this case, the stress generated in the strut and the main girder is dispersed to suppress the occurrence of cracks in the portion where the strut and the main girder are fixed to each other.

  Here, the support member can be made of FRP like the main girder and the like, but it is desirable to make the support member made of metal such as stainless steel having higher strength from the viewpoint of improving safety.

  Furthermore, in the part where the support column of the main girder is fixed, if it is configured to be provided with a support column reinforcing portion reinforcing member that is fixed to a corner portion between at least the upper surface and the side surface of the main beam. Since the corner portion on the upper surface side of the main girder where stress is most easily concentrated when an impact load is applied to the column is reinforced, cracks in the main beam and the column can be further prevented.

  And when the said main girder is a hollow member, it is good to set it as the structure by which the said support | pillar attachment part reinforcement member is contact-fixed at least to the inner surface of the corner part of the said main girder. In other words, when the strut mounting part reinforcement member is abutted and fixed to the outer surface of the corner part of the main girder, there will be a small step on the top surface of the main girder, but it will be difficult for workers working on the corridor to walk, If the portion reinforcing member is provided inside the main girder that is a hollow member, the upper surface of the main girder can be flattened, and the operator can easily walk on the main girder.

  Here, the strut attachment portion reinforcing member may be made of FRP, like the strut support member, but is desirably made of metal such as stainless steel.

  In addition, a second invention of the present application includes a main girder, a support column erected at a plurality of positions in the longitudinal direction of the main beam, and a handrail attached to the support column in a state extending in the longitudinal direction of the main beam. In the fiber reinforced resin walkway in which at least the main girder and the support column are made of fiber reinforced resin, the main girder is a hollow member having a rib extending in the longitudinal direction therein, and the lower surface side thereof is fixed to the gantry In the portion of the main girder fixed to the gantry, a corner portion between a side surface and a bottom surface inside the main girder, a bottom surface inside the main girder, and a side surface of the rib A configuration in which a gantry fixing portion reinforcing member that is abutted and fixed to at least one of the corner portions in between is provided.

  That is, when the main girder is a hollow member having a longitudinal rib in the main girder, the corner portions on both sides in the width direction inside the main girder are fixed at the portion fixed to the frame on the lower surface side. By providing the base fixing part reinforcement member at the corner of the rib, the stress generated in the main girder when the main girder is subjected to an impact load via a handrail or a post is dispersed, and each corner part inside the main girder is dispersed. It made cracks less likely to occur.

  As described above, the first invention of the present application is provided at the position adjacent to the main girder column of the FRP corridor, provided with a column support member fixed to both the main beam and the column, and is assumed when the operator falls. Even if an impact load is applied to the column, the part of the column and the main girder that are fixed to each other is made less likely to be damaged, so that the safety of the FRP corridor can be improved as compared with the prior art.

  Further, in the second invention of the present application, when the main girder of the FRP corridor is formed of a hollow member, in the portion fixed to the frame on the lower surface side of the main girder, Since the base fixing part reinforcement member is provided at the corner part and the corner part of the rib, each corner part inside the main girder is not easily damaged even if the impact load assumed when the operator falls is applied to the column. The safety of the FRP walkway can be improved as compared with the prior art.

Side view of the FRP walkway of the first embodiment 1 is a longitudinal front view showing an enlarged main portion of a cross section taken along line II-II in FIG. 2 is an exploded perspective view near the cross section of FIG. a is a left side view of FIG. 2, b is a plan view of a. The longitudinal front view which shows the principal part of the FRP walkway of 2nd Embodiment corresponding to FIG. a is a left side view of FIG. 5, and b is a plan view of a. A longitudinal front view showing a modification of the second embodiment corresponding to FIG. Longitudinal front view showing the main part of the FRP walkway of the third embodiment

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a first embodiment. As shown in FIGS. 1 and 2, the FRP walkway includes a main girder 1, pillars 2 erected on both sides of the main girder 1 at a plurality of positions in the longitudinal direction of the main girder 1, and the length of the main girder 1. It consists of a plurality of handrails 3 attached to the pillars 2 in a state extending in the direction, and a pillar support member 4 provided at a position adjacent to the lower end of each pillar 2, and the main girder 1, the pillars 2 and the handrails 3 are Each is formed of fiber reinforced resin (FRP), and the column support member 4 is formed of stainless steel.

  As shown in FIGS. 2 and 3, the main girder 1 has a hollow plate shape including an upper surface portion 11, a lower surface portion 12, and both side surface portions 13, and the upper surface portion 11 and the lower surface portion are provided at a plurality of positions in the width direction. 12 is a one-piece molded article having ribs 14 extending in the longitudinal direction. In addition, since the upper surface part 11 has a slope that is centered in the width direction on the upper surface side and descends toward both sides in the width direction, rainwater or the like hardly slides down on both sides in the width direction, It is difficult to slip your foot.

  Further, as shown in FIG. 4B, the lower surface portion 12 of the main girder 1 is provided with a circular opening 15 in the vicinity of a portion where each support column 2 is fixed. The column 2 can be fixed to the side surface 13 of the main girder.

  As shown in FIGS. 1 to 4 (a) and 4 (b), each support column 2 is a member having an L-shaped cross section composed of two strip portions 21, 22, and the lower end portion of one strip portion 21. Are fixed to the outer side surface (side surface of the main beam 1) of the side surface portion 13 of the main beam 1 by bolts and nuts.

  As shown in FIG. 1, each of the handrails 3 is a tubular member, and the other strip-shaped portion 22 (in the direction orthogonal to the main girder side surface portion 13) of the plurality of columns 2 arranged in the longitudinal direction of the main girder 1. 3 stages (upper stage, middle stage, lower stage) are arranged in the vertical direction. Among them, the upper handrail 3 has a larger diameter than that of the middle and lower handrails 3 in order to ensure rigidity, and is fixed to the support post 2 by a fixing tool 5 before and after each support post 2 penetrating position. ing. On the other hand, the middle and lower handrails 3 are fixed to the support columns 2 arranged at both ends in the longitudinal direction of the main girder 1 with fixing tools 5 at the front and rear of the penetrating positions of the support columns 2.

  And each said support | pillar support member 4 is a cross-sectional L-shaped member which consists of two rectangular plate-shaped attachment parts 41 and 42, as shown to FIG. 1 thru | or FIG. 4 (a), (b), One mounting portion 41 is applied to the outer surface of the side surface portion 13 of the main girder 1, and the other mounting portion 42 is applied to the side surface of the other strip-shaped portion 22 of the column 2 facing the longitudinal direction of the main girder 1 by bolts and nuts. It is fixed.

  This FRP-made corridor has the above-described configuration, and the column support member 4 fixed to both the main beam 1 and the column 2 is provided at a position adjacent to the column 2 of the hollow main beam 1. Even when an operator who has applied a safety belt falls and an impact load is applied to the column 2 via the handrail 3, the stress generated in the column 2 and the main girder 1 is dispersed, and the column 2 and the main beam 1 are mutually connected. Damage, such as cracks, is difficult to occur at the site where the material is fixed, and is safer than before.

  Here, the column support member 4 can be made of FRP like the main girder 1 and the like. However, from the viewpoint of improving safety, the support member 4 is made of metal such as stainless steel having higher strength as in this embodiment. It is desirable to do.

  5 and 6 (a) and 6 (b) show a second embodiment. This second embodiment is based on the first embodiment in which the support column support member 4 is provided, and is further provided with a column attachment portion reinforcement member 6 for reinforcing the portion to which the column 2 of the main girder 1 is fixed. It is.

  The strut attachment portion reinforcing member 6 is formed by bending both longitudinal ends of a belt-shaped stainless steel plate into an L shape, and the upper surface portion of the main girder 1 between the struts 2 facing on both sides in the width direction of the main girder 1. Both end portions are sandwiched between the side surface portion 13 of the main beam 1, the support column 2 and the support column support member 4 in a state of covering the entire width 11. Both end portions are provided with holes (not shown) through which bolts for fixing the column 2 and the column support member 4 are passed, and the side portion 13 of the main girder 1 together with the column 2 and the column support member 4 by the bolts and nuts. It is fixed to.

  And in this 2nd Embodiment, when the impact load is added to the support | pillar 2, the corner part of the upper surface side of the main girder 1 in which stress concentrates most easily is reinforced by the support | pillar attachment part reinforcement member 6. The main girder 1 and the support column 2 are less likely to crack than in the embodiment, and are excellent in safety.

  In addition, the width | variety (dimension of the main girder 1 longitudinal direction) of the support | pillar attaching part reinforcement member 6 is some to the longitudinal direction both sides of the main girder 1 from the support | pillar 2 and the support | pillar support member 4, as shown in FIG. Although it is desirable to set it as the dimension which protrudes, it can also be set to the dimension smaller than this as needed.

  Further, since the strut attachment portion reinforcing member only needs to be in contact with and fixed to the upper side corner portions on both sides in the width direction of the main girder 1, for example, the strut attachment portion reinforcing member shown in FIGS. It is also possible to use only the portions having an L-shaped cross section at both ends of 6.

  FIG. 7 shows a modification of the second embodiment. In this modification, instead of the column attachment portion reinforcement member 6 shown in FIGS. 5 and 6, the column attachment portion reinforcement member 7 that is abutted and fixed to the inner surfaces of the upper side corner portions on both sides in the width direction of the main girder 1. Is provided.

  The strut attachment portion reinforcing member 7 is a stainless steel plate bent in an L shape, and is positioned facing one belt-like portion 21 of the strut 2 across the side surface portion 13 of the main girder 1 (the inner surface of the strut 2 attachment position). Side) and a position facing one mounting portion 41 of the column support member 4 (the inner surface side of the column support member 4 mounting position). And the hole (illustration omitted) which lets the volt | bolt for fixation of the support | pillar 2 or the support | pillar support member 4 pass is formed in the part contact | abutted to the inner surface of the side part 13 of the main girder 1, respectively. It is fixed to the side surface 13 of the main girder 1 together with the column support member 4 to reinforce the corner portion on the upper surface side of the main girder 1. Therefore, also in this modified example, as in the example shown in FIGS. 5 and 6, safety superior to that of the first embodiment can be obtained.

  Moreover, in the example shown in FIG. 5 and FIG. 6, a slight step due to the column attachment portion reinforcing member 6 is generated on the upper surface of the main girder 1, so that the worker is slightly difficult to walk, but in the modification shown in FIG. Since the column attachment portion reinforcing member 7 is provided inside the main girder 1 which is a hollow member, the upper surface of the main girder 1 is flat and the operator can easily walk on the main girder 1.

  In addition, as described above, it is preferable that the column mounting portion reinforcing member of this modification is provided on both the inner surface side of the column 2 mounting position of the main girder 1 and the inner surface side of the column support member 4 mounting position. What is necessary is just to be provided. Moreover, when providing only in any one, it is good to provide in the direction of the inner surface side of the support | pillar 2 attachment position.

  FIG. 8 shows a third embodiment. The third embodiment is based on the first embodiment. When the lower surface portion 12 of the main girder 1 is fixed to the gantry 8 with bolts and nuts in the vicinity of the side surface portion 13, the gantry 8 of the main girder 1 is used. A gantry fixing part reinforcing member 9 is provided to reinforce a portion fixed to the frame.

  The gantry fixing part reinforcing member 9 is a stainless steel plate in which both ends in the width direction of the main girder 1 are bent in an L shape, and the main girder 1 between the side surface part 13 of the main girder 1 and the rib 14 opposed thereto. In the internal space, it extends along the bottom surface, and is arranged in a state of contacting a corner portion between the bottom surface and the inner surface of the side surface portion 13 and a corner portion between the bottom surface and the side surface of the rib 14. A hole (not shown) through which a bolt for fixing the main girder 1 is passed is formed in a portion that contacts the bottom surface inside the main girder 1 and is fixed to the lower surface portion 12 of the main girder 1 by the bolt and nut.

  And in this 3rd Embodiment, in the site | part fixed to the mount 8 of the main girder 1, when the main girder 1 receives an impact load via the handrail 3 or the support | pillar 2, the stress which arises in the main girder 1 is fixed to a mount. Since it is dispersed by the portion reinforcement member 9, damage such as cracks is less likely to occur at the corners on both sides in the width direction inside the main girder 1 and the corners at the base of the ribs 14. Improvements are being made.

  The gantry fixing part reinforcing member is to be abutted and fixed to both the corner part on both sides in the width direction inside the main beam 1 and the corner part of the base of the rib 14 facing the side face part 13 as described above. Although it is desirable, it is good also as what is contact | abutted and fixed to any one corner part.

  Further, the column attachment portion reinforcing members 6 and 7 of the second embodiment and the gantry fixing portion reinforcement member 9 of the third embodiment can also be made of FRP, like the column support member 4 of the first embodiment. However, from the viewpoint of improving safety, it is desirable to use a metal such as stainless steel as in each embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  For example, in each of the above-described embodiments, the column support member is fixed to the side surface of the main girder and the side surface of the column that faces the longitudinal direction of the main beam so that the worker does not have difficulty walking. You may make it fix to the upper surface of a girder, and the side surface which faces the main girder width direction of a support | pillar.

  Moreover, although the main girder of each embodiment is formed of a hollow member, the strut support member of each embodiment and the strut attachment portion reinforcing member that is abutted and fixed to the outer surface of the main girder of the second embodiment are the main girder. However, the present invention can also be applied to an FRP walkway formed of a solid member.

DESCRIPTION OF SYMBOLS 1 Main girder 2 Column 3 Handrail 4 Column support member 5 Fixture 6 and 7 Column attachment part reinforcement member 8 Frame 9 Frame fixing part reinforcement member 11 Upper surface part 12 Lower surface part 13 Side surface part 14 Rib 15 Opening 21 and 22 Band-shaped part 41, 42 Mounting part

Claims (6)

A main girder, a column that is erected at a plurality of locations in the longitudinal direction of the main beam, and a handrail that is attached to the column in a state extending in the longitudinal direction of the main beam, and the column is attached to a side surface of the main beam In the fiber reinforced resin walkway, which is fixed and at least the main girder and the column are formed of fiber reinforced resin,
A fiber reinforced resin walkway characterized in that a pillar support member fixed to the main girder at a position adjacent to the pillar and fixed to a side surface of the pillar is provided.   The fiber reinforced resin walkway according to claim 1, wherein the support member is made of metal.   The column mounting portion reinforcing member is provided at a portion where the column of the main girder is fixed, which is fixed at least to a corner portion between an upper surface and a side surface of the main beam. A fiber reinforced resin walkway according to 1 or 2.   The fiber reinforced resin walkway according to claim 3, wherein the main girder is a hollow member, and the strut mounting portion reinforcing member is fixed to at least an inner surface of a corner portion of the main girder.   The fiber reinforced resin walkway according to claim 3 or 4, wherein the support member reinforcing member is made of metal. A main girder, a column that is erected at a plurality of locations in the longitudinal direction of the main beam, and a handrail that is attached to the column in a state of extending in the longitudinal direction of the main beam, and at least the main beam and the column are fiber reinforced. In a fiber reinforced resin walkway made of resin,
The main girder is a hollow member having a rib extending in the longitudinal direction inside thereof, the lower surface side of which is fixed to a gantry, and the main girder is fixed to the gantry at the portion of the main girder There is provided a gantry fixing portion reinforcing member that abuts and is fixed to at least one of a corner portion between the inner side surface and the bottom surface, and a corner portion between the inner bottom surface of the main girder and the side surface of the rib. A walkway made of fiber-reinforced resin.

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