JP2024064424A - Plastic inspection track - Google Patents

Abstract

[Problem] To provide a plastic inspection path that allows easy inspection of the fixed part to a structure. [Solution] In a plastic inspection path with a hollow plate-like floor material 1 placed on a support frame 10 that overhangs the structure, a cover 5 is arranged to cover the upper surface of the part of the floor material 1 placed on the support frame 10, the cover 5 has an abutment part 5a that extends in the width direction of the floor material 1 and partially covers the upper surface of the floor material 1, legs 5b that hang down from both ends of the abutment part 5a, and overhanging parts 5c that extend outward from the lower ends of each leg 5b, and the cover 5 is arranged to cover the upper surface of the part of the floor material 1 placed on the support frame 10, and the overhanging parts 5c are bolted to the support frame 10, thereby fixing the entire inspection path to the structure. With this configuration, the bolt-fastened part of the cover 5 to the support frame 10, i.e., the fixed part of the inspection path to the structure, can be easily inspected from above the floor material 1. [Selected Figure] Figure 1

Description

The present invention relates to an inspection road for carrying out maintenance and inspection of bridges, etc.

Road and railway bridges are usually equipped with inspection tracks for regular inspection of the girders, decks, piers, and surrounding facilities, and for repairing any damaged parts. Traditionally, most of these inspection tracks were made of steel, but in recent years, there has been an increase in those made of fiber-reinforced plastic (FRP), which is lightweight while still maintaining the necessary strength.

A typical fiber-reinforced resin inspection path (hereafter simply referred to as a "resin inspection path") is made up of a floor material that is hollow or has a C-shaped cross section with an opening on the bottom, posts erected at intervals on both sides of the floor material, and multiple levels of handrails attached to the posts, with the floor material, posts, and handrails all being made of FRP.

When attaching such a plastic inspection road to a structure such as a bridge, the floor material of the plastic inspection road is placed on a support frame (bracket) that protrudes from the structure, and the entire inspection road is fixed to the structure by bolting the underside of the floor material to the support frame using openings provided on the underside of the floor material (see, for example, Patent Document 1).

Japanese Patent No. 7041892 (Fig. 8)

However, when a plastic inspection path is fixed to a building in the manner described above, it is necessary to set up scaffolding below the inspection path or use a high-altitude work vehicle when inspecting the bolts and nuts fastening the floor material to the support frame, which creates the problem that the entire inspection process is very complicated and requires a high workload.

Therefore, the objective of the present invention is to provide a plastic inspection path that allows easy inspection of the fixed parts of the structure.

To solve the above problems, the present invention employs a configuration (configuration 1) in which a resin inspection path has a floor material placed on a support stand that protrudes from a building, and has a cover that extends in the width direction of the floor material and is fixed to the support stand in a state where it partially covers the upper surface of the floor material.

According to the above configuration 1, the entire inspection path can be fixed to the structure by fixing a cover that partially covers the top surface of the floor material to the support frame on the side of the floor material, so that the worker can easily inspect the fixed part from above the floor material.

As an example of the above configuration 1, the flooring materials can be arranged in a state where multiple pieces are butted together in the longitudinal direction, and the butted parts are placed on the support stand, and the cover can cover the butted parts of each of the flooring materials (configuration 2).

In the above configurations 1 and 2, if the cover is also fixed to the sides of the flooring (configuration 3), it is possible to prevent the flooring from moving longitudinally (coming out) or widthwise (shifting, twisting) after being fixed to the building.

As an example of the above configuration 3, the cover can have a contact portion that contacts the upper surface of the flooring, legs that hang down from both ends of the contact portion and are fixed to the sides of the flooring, and protrusions that extend outward from the bottom ends of the legs and are fixed to the support frame (configuration 4).

In addition, in any of the above configurations 1 to 4, if a toe plate is attached to the side of the flooring, an opening may be provided between the flooring and the toe plate to allow the cover to pass through in the width direction of the flooring (configuration 5).

In addition, the present invention can be particularly effectively applied in any of the above configurations 1 to 5 when the flooring material is hollow or has an opening on the underside.

As described above, the resin inspection path of the present invention is designed so that the entire inspection path is fixed to the building by fixing the cover that covers the top surface of the floor material placed on the support frame to the support frame, so that inspection work on the fixed part can be easily performed from above the floor material. This eliminates the trouble of setting up scaffolding or using aerial work vehicles that were previously required for inspection, and significantly reduces the workload of the entire inspection work.

FIG. 1 is an external perspective view of a resin inspection path according to an embodiment; FIG. 2 is an exploded perspective view of the resin inspection path of FIG. A side view of the plastic inspection path of FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 4 is a cross-sectional view taken along line VV of FIG. Right side view of FIG. Plan view of FIG. FIG. 2 is an external perspective view showing a modified example of the flooring material of FIG. 1 .

The following describes an embodiment of the present invention based on the drawings. As shown in Figs. 1 to 3, this resin inspection road is equipped with a plurality of floor materials 1 placed on a support frame (bracket) 10 extending from a structure such as a bridge (not shown), support posts 2 erected at intervals on both sides of the floor material 1, three stages of handrails 3 attached to the support posts 2, toe boards 4 extending along both sides of the floor material 1, and a cover 5 extending in the width direction of the floor material 1 and fixed to the support frame 10 in a state of partially covering the upper surface of the floor material 1. The support posts 2 are composed of a main body 2a to which the handrails 3 are attached, and a reinforcing part 2b attached to the lower end part of the main body 2a. The floor material 1, support posts 2, handrails 3, toe boards 4 and cover 5 are made of FRP, but the reinforcing part 2b of the support posts 2 may be made of stainless steel or steel plated for rust prevention purposes in order to emphasize strength and rigidity.

As shown in Figures 4 and 5, the floor material 1 is a hollow plate-like member consisting of an upper surface 11, a lower surface 12, and both side surfaces 13, and is an integrally molded product (a main girder and a deck slab integrated together) that has ribs 14 extending in the longitudinal direction between the upper surface 11 and the lower surface 12 at multiple locations in the width direction. Multiple floor materials 1 are arranged so that their ends are butted together in the longitudinal direction, and the butt joints are placed on the support frame 10, and the butt joints are covered by the cover 5.

In addition, the upper surface 11 of each flooring material 1 is provided with circular openings 15 near the area where the support 2 is fixed and near the area covered by the cover 5 (the butt joint), and these openings 15 can be used to fix the support 2 and cover 5 to the flooring material 1, as described below. The openings 15 are normally covered with a removable cover 16.

As shown in Figures 1 to 4, the support 2 has a main body 2a and a reinforcing part 2b, both of which are L-shaped in cross section and made up of two strip parts. One strip part of each is fixed to the side part 13 of the flooring material 1 with a bolt and nut that penetrate outward from the inner surface of the side part 13, and the other strip parts are fixed to each other with a bolt and nut that penetrate each other.

As shown in Figs. 1 to 5, the toe plate 4 is separated into a number of toe plate pieces 4a in the longitudinal direction, and the toe plate pieces 4a arranged in the longitudinal direction are arranged with their downward side end faces abutting against the upper surface 11 of the flooring 1 and butting against each other near the butt joints of the flooring 1. Each toe plate piece 4a is attached to the side of the flooring 1 via the support 2 by being fixed to one of the strip parts of the main body part 2a and the reinforcing part 2b of the support 2 with a bolt and nut. Also, as shown in Fig. 6, each toe plate piece 4a has a notch 4b at the corner between the longitudinal end face and the downward side end face, and this notch 4b forms an opening between the flooring 1 and the toe plate 4 to pass the cover 5 in the width direction of the flooring 1.

As shown in Figures 1 to 3 and 5 to 7, the cover 5 is composed of an abutment portion 5a that abuts against the upper surface of the upper surface portion 11 of the floor material 1, legs 5b that hang down from both ends of the abutment portion 5a, overhanging portions 5c that extend outward from the lower ends of each leg 5b, and triangular plate-shaped reinforcing portions 5d that are arranged at the corners between the legs 5b and the overhanging portions 5c, and both ends of the abutment portion 5a are arranged in a state where they pass through the opening between the floor material 1 and the toe board 4. The overhanging portions 5c are fixed to the support frame 10 with bolts and nuts that penetrate upward from the underside of the support frame 10, thereby fixing the entire inspection path to the building. The legs 5b of the cover 5 are also fixed to the side portions 13 of the floor material 1 that are butted against each other in the longitudinal direction with bolts and nuts that penetrate outward from the inner surfaces of the side portions 13.

This resin inspection path is constructed as described above, and the entire inspection path is fixed to the structure by bolting the overhanging portion 5c of the cover 5, which partially covers the top surface of the floor material 1, to the support frame 10 on the side of the floor material 1, so that the fixed portion (bolt fastening portion) can be easily inspected from above the floor material 1.

In addition, when inspecting the legs 5b of the cover 5 and the fixing parts (bolt fastening parts) of the support 2 to the floor material 1, the worker can remove the lid 16 from the opening 15 on the top surface of the floor material 1 and easily check the condition of the bolts inside the floor material 1.

And by fixing the legs 5b of the cover 5 to the side portions 13 of the flooring 1, the flooring 1 is less likely to move longitudinally (pull out) or widthwise (shift or twist) after the entire inspection path is fixed to the building.

Figure 8 shows an example in which the flooring 1 shown in Figures 1 to 7 has been replaced with a flooring 21 of a different structure. The flooring 21 of this modified example comprises two U-shaped main girders 22 that form both sides, a reinforcing plate 23 that is placed between the main girders 22 at a predetermined position in the longitudinal direction, and a floor slab 24 that is placed on the main girders 22 and the reinforcing plate 23, and these components are joined by bolting or the like to form a C-shaped cross section with an opening on the underside. When this flooring 21 is used, the same effect as the example shown in Figures 1 to 7 can be achieved by fixing a cover 5 that partially covers the upper surface of the flooring 21 to the support frame 10.

In the above-described embodiment, the butt joints of the flooring materials lined up in the longitudinal direction are placed on the support frame, but for example, when the flooring materials are long and it is necessary to support the middle part in the longitudinal direction as well, or when supporting the protruding part from the support frame, the middle part of the flooring material may be placed on the support frame. Here, the protruding part refers to a part that ends in a "dead end" or that connects to an abutment, pier, ladder, etc. Furthermore, when a cover is fixed to the support frame on which the middle part of the flooring material is placed, the cover does not need to be fixed to the flooring material.

In addition, even if the cover is fixed to the support stand on which the butt joints of the flooring materials are placed as in the embodiment, the cover may not be fixed to the flooring materials. For example, the toe board may be fixed in a continuous state across the flooring materials lined up in the longitudinal direction to integrate the two flooring materials, thereby preventing the individual flooring materials from coming loose, shifting, or twisting.

In addition, in the embodiment, the upper surface of the flooring is provided with openings for fastening the posts and cover to the flooring. However, instead of providing such openings in the flooring, bolt holes can be pre-drilled near the butt joints of the flooring and nuts can be fastened to the inner side of the periphery of the bolt holes, or bolts can be fastened from the inner side through the bolt holes, and the posts and cover can be fastened using the nuts or bolts.

The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the meaning described above, and is intended to include all modifications within the meaning and scope of the claims.

Reference Signs List 1, 21 Floor material 2 Support 3 Handrail 4 Toe plate 4a Toe plate piece 4b Notch 5 Cover 5a Contact portion 5b Leg 5c Projection portion 10 Support base 11 Upper surface portion 12 Lower surface portion 13 Side portion 14 Rib 15 Opening 16 Lid 22 Main girder 23 Reinforcement plate 24 Deck

Claims (6)

In a resin inspection walkway having a floor material placed on a support stand extending from a building,
A resin inspection path characterized in having a cover that extends in the width direction of the floor material and is fixed to the support stand in a state where it partially covers the upper surface of the floor material. The resin inspection path described in claim 1, characterized in that the floor materials are arranged in a state where multiple pieces are butted together in the longitudinal direction, the butt joints are placed on the support stand, and the cover covers the butt joints of each of the floor materials. The resin inspection path according to claim 1 or 2, characterized in that the cover is fixed to the side of the floor material. The resin inspection path described in claim 3, characterized in that the cover has an abutment portion that abuts against the upper surface of the floor material, legs that hang down from both ends of the abutment portion and are fixed to the sides of the floor material, and overhanging portions that extend outward from the lower ends of each leg and are fixed to the support frame. The resin inspection path described in claim 1, characterized in that a toe plate is attached to the side of the floor material, and an opening is provided between the floor material and the toe plate to pass the cover through in the width direction of the floor material. The resin inspection path described in claim 1, characterized in that the floor material is hollow or has an opening on the underside.

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