Simultaneous inspection method for tunnel inner walls

Abstract

To provide a method capable of disposing a plurality of work tables in a stair-shape from a high ceiling to a lower side wall along an inner wall of half a tunnel, and simultaneously performing tunnel inspection while traveling.SOLUTION: In a tunnel inspection method, a plurality of operators M1 to Mn attach a plurality of work tables B1 to Bn for simultaneous inspection to a support arm 120 including a four-node link mechanism 121 at constant intervals, tilt the support arm 120 diagonally upward by a horizontal rotation and tilt arm mechanism, and dispose the plurality of work tables at the constant intervals from a high ceiling W-high to a lower side wall W-low along an inner wall of half a tunnel.SELECTED DRAWING: Figure 14

Description

[Technical field]

[0001] The present invention relates to a method for simultaneously inspecting a tunnel by arranging multiple work platforms in a stepped manner using a tilting support arm mechanism mounted on the bed of a truck in order to perform inspection work on the inner walls of road tunnels and other road facilities. [Background technology]

[0002] In road tunnels such as those on expressways, inspection and repair / reinforcement work is regularly carried out on the inner walls of road tunnels to prevent accidents such as the collapse of the concrete inner walls. Existing aerial work vehicles, for example, are used for road tunnel inspection and repair work. Aerial work vehicles generally have a structure in which a hydraulic lift-type aerial work platform is mounted on the loading platform of a traveling vehicle such as a truck (Figure 16), and multiple vehicles are used simultaneously to change the working position between the front and rear (Figure 15(b)).

[0003] This type of existing high-altitude work vehicle has limitations in the lifting capacity and movement range of the cart carrying the workers. This is inconvenient for inspecting road tunnels with different ceiling heights, and requires multiple work vehicles. Also, it is not possible to efficiently inspect each part inside a wide road tunnel. Also, only one, two or three workers can ride on the cart. This makes it difficult for many workers to inspect the inner walls of a road tunnel at the same time.

[0004] Therefore, it is desirable to provide a road inspection vehicle that can be mounted on the bed of a truck and brought into a work site on the road, for example, into a road tunnel, to safely and easily carry out repair and inspection work on the inner walls, etc. Therefore, a tunnel inspection vehicle has been proposed that has a structure in which a plurality of work platforms are arranged in a stepped manner at regular intervals from the ceiling high point to the low point of the side wall along the inner wall of the half of the tunnel, so that a plurality of workers can simultaneously inspect the inner wall of the half of the tunnel from the ceiling high point to the low point of the side wall, while traveling along the width of either the left or right half of the passage center line extending in the longitudinal direction of the tunnel. Specifically, as shown in Patent Document 1, a road inspection machine that is mounted on the bed of a truck and used has been proposed, which includes a bed mounting frame that is mounted on the bed of the truck, a lifting frame that is mounted on the bed mounting frame so that it can be raised and lowered, a manual lifting mechanism for raising and lowering the lifting frame, a lifting and swivel type work platform that is mounted on the lifting and swivel type work platform and can be rotated 90 degrees clockwise from a forward-facing position to a sideways position about a vertical axis while maintaining a horizontal position, a push-out type work platform mounted on the lifting and swivel type work platform, and a manual push-out mechanism for moving the push-out type work platform from a state where it is placed on the lifting and swivel type work platform toward the front and upward of the swivel type work platform while maintaining the horizontal position, to a push-out state where it is raised a predetermined amount from the lifting and swivel type work platform (Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Registered Utility Model No. 3214624 Summary of the Invention [Problem to be solved by the invention]

[0006] However, it is troublesome to manually adjust the height and overhang of many work platforms according to the height of various tunnels and road widths, and there is a drawback in that the adjustment range is limited and versatility is lacking. Therefore, it is desired to provide a tunnel inspection method that allows easy adjustment of the height and overhang of the work platform according to the size of the tunnel and the purpose of the work. [Means for solving the problem]

[0007] The inventors have realized that if multiple work platforms are attached to a cart that can travel on half of the road inside the tunnel using a mechanism in which a support arm that extends at an angle from a low point to a high point in the tunnel is tiltably attached to a horizontal rotating arm, multiple work platforms can be arranged in a stepped pattern from a high point in the tunnel ceiling to a low point on the side wall while maintaining a good weight balance, and have completed this product. A method in which a plurality of work platforms B1-Bn are arranged in a stepped pattern along the inner wall of a half of a tunnel from a ceiling high point to a side wall low point, and a plurality of workers M1-Mn ride on each work platform B1-Bn while traveling on a truck and simultaneously inspect the inner wall W of the half of a tunnel T from a ceiling high point W·high to a low point W·low, Among the plurality of work tables B1 to Bn, the main work table Bn is horizontally rotatable together with the horizontally rotating arm 110 around the first rotation axis R1 at the center of the platform, and is provided so as to be horizontally rotatable by the auxiliary arm 110a around the second rotation axis R2 independently of the horizontally rotating arm 110 and to be slidable along the auxiliary arm, while the other work tables B1 to Bn-1 are supported by the support arm 120 which rotates horizontally together with the horizontally rotating arm 110 and tilts in a crocodile-mouth manner with respect to the horizontally rotating arm by the drive cylinder 140, at regular intervals from the tip to the base, and if necessary, arranged in a stepped manner via a four-joint link mechanism, First, the horizontal rotating arm 110, which is in the work platform storage position S extending in the longitudinal direction of the platform, is rotated around the first rotation axis R1 in the center of the platform to the working position O extending in the lateral width direction of the platform; Secondly, at that position, the support arm 120 is tilted with respect to the horizontal rotating arm 110 by the drive cylinder 140 until the tip work platform B1 approaches the tunnel ceiling, Third, the main worktable Bn is rotated via the auxiliary arm 110a and slid along the auxiliary arm 110a to balance the load. This tunnel inspection method is characterized in that work platforms B1 to Bn are arranged in a stepped manner from a ceiling high point W·high to a low point W·low on half of the inner wall W of the tunnel T while traveling, and a plurality of workers M1 to Mn simultaneously inspect each work platform B1 to Bn. Effect of the Invention

[0008] According to the present invention, while a truck is traveling at a low speed, multiple people can simultaneously carry out inspection work on multiple work platforms arranged in a stepped pattern. That is, the support arm 120 that supports the work platforms in a stepped pattern is configured as a tiltable alligator-mouth opening type relative to the horizontal rotating arm 110, so that by adjusting the tilt angle α of the support arm 120 relative to the horizontal rotating arm 110 using the drive cylinder 140, the work platform B1 at the tip high place near the ceiling in the tunnel and the work platform B4 at the low place at the base of the support arm can be arranged, and the appropriate positions can be easily secured in order from the high place B1 to B4 via B2, B3, etc.

[0009] In this case, the load applied to the truck from the support arm 120 via the horizontal swivel arm 110 is provided with a counterweight 113 attached to the opposite end of the horizontal swivel arm 110, and the main work platform Bn, which is located in the center of the inspection vehicle loading platform, is arranged to be rotatable around the second rotation axis R2 independently of the horizontal swivel arm 110 and to be slidable along the horizontal swivel arm 110 toward the end 122 protruding in the vehicle width direction, so that a load balancing mechanism can be provided that can offset the load against the support arm by cooperation between the rotation position of the main work platform Bn and the counterweight 112.

[0010] In addition, a support arm 120 that can tilt multiple work platforms to a working position O extending at an angle from a low point on the tunnel inner wall to the ceiling height constitutes a four-bar link mechanism 121 made up of a pair of parallel main arms 121a and auxiliary arms 121b, and multiple work platforms B1 to Bn are pivotally attached via support links 122 from the high tip to the low base at regular intervals. Therefore, the work platforms are maintained horizontal at any tilt angle position of the support arm, making inspection work easier. [Brief description of the drawings]

[0011] [Figure 1] FIG. 11 is a side view showing a storage state of multiple work tables in the method of the present invention. [Diagram 2] FIG. 2 is a plan view showing a storage state of multiple work tables in the method of the present invention. [Diagram 3] 1 is a plan view of a state in which multiple work tables have been rotated to a work position O in the method of the present invention. FIG. [Figure 4] 1 is a plan view of a state in which multiple work tables have been rotated to a work position O in the method of the present invention. FIG. [Diagram 5] 1 is a side view of a state in which multiple work tables have been rotated to a work position O in the method of the present invention. [Figure 6] 13 is a rear view showing the state in which the support arm has been rotated to the working position of the inspection vehicle of the present invention and then tilted to arrange multiple work platforms in a stepped manner. [Figure 7] 13 is a rear view showing the state in which the support arm has been rotated to the working position of the inspection vehicle of the present invention and then tilted to arrange multiple work platforms in a stepped manner. [Figure 8] This is a plan view showing the state in which the support arm is tilted at the working position of the inspection vehicle of the present invention, multiple work platforms are arranged in a stepped shape, and then the main work platform is rotated. [Figure 9] This is a side view showing the state in which the support arm has been tilted at the working position of the inspection vehicle of the present invention, multiple work platforms have been arranged in a stepped pattern, and then the main work platform has been rotated. [Figure 10] FIG. 1 is a rear view showing a stable working state with the counterweight extended at the working position and the stabilizer SL installed. [Figure 11] FIG. 11 is a plan view showing a state in which the main work platform Bn is slid back and forth and rotated left and right to set the optimum balance position at the work position shown in FIG. 10 in which the main work platform has been rotated parallel to the loading platform. [Figure 12] FIG. 11 is a side view showing a state in which the main work platform Bn is slid back and forth and rotated left and right to set the optimum balance position at the work position shown in FIG. 10 in which the main work platform has been rotated parallel to the loading platform. [Figure 13]1A is a side view of the main part showing the state before the tilting mechanism of the support arm is tilted, and FIG. 1B is a side view of the main part after being tilted by a tilt angle α. [Figure 14] FIG. 2 is a rear view showing a first working state inside the tunnel. [Figure 15] FIG. 1(a) is a rear view showing a second working state in a tunnel of the present invention, and FIG. 1(b) is a rear view showing a conventional working state in a tunnel. [Figure 16] FIG. 1 shows a front view of a conventional tunnel inspection vehicle equipped with a single work platform. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of a tunnel inspection method to which the present invention is applied will be described with reference to the drawings. In the tunnel inspection of the present invention, as shown in FIG. 15(a), multiple workers M1 to M5 travel along the width of either the left or right half of the boundary center line of the road extending in the longitudinal direction within tunnel T, and simultaneously inspect the interior wall W of half of tunnel T from the ceiling high point W·high to the low point W·low on multiple work platforms B1 to Bn that are arranged in a stepped pattern at regular intervals along the interior wall of that half of the tunnel, from the ceiling high point to the side wall low point.

[0013] As shown in Fig. 14, this structure 100 is equipped with a horizontally rotating arm 110 that rotates clockwise and counterclockwise around a first rotation axis R1 at the center of the loading platform. A tilting support arm 120 is pivotally attached to an end 111 of the arm 110 that protrudes beyond the width of the vehicle, with its base 121 as a fulcrum, and extends obliquely upward from a low base point W·low to a high tip point W·high, supporting the work platforms B1 to Bn-1 in a stepped manner. In order to tilt the support arm 120 in an alligator mouth opening manner, a drive cylinder 140 is used to tilt the horizontally rotating arm 110. On the other hand, a counterweight 113 is provided at an end 112 on the opposite side across the first rotation axis R1 of the horizontally rotating arm in order to balance the load with the end 111 to which the base 121 of the support arm is pivotally attached. In addition, stabilizer legs SL extending downward from the loading platform and touching the ground on both sides of the rear wheels of the truck can prevent the loading platform from shaking in the width direction.

[0014] In the present invention, as shown in the side view of Fig. 1 and the plan view of Fig. 2, a wide main work platform Bn is rotatably provided in the center of the platform via a horizontal swivel arm 110 that is rotatable around a first rotation axis R1, and a support arm 120 is pivotally attached to the end 111 of the horizontal swivel arm 110 with its base 121 as a fulcrum so as to cover the main work platform Bn. A slightly longer sub-work platform B1 and normal work platforms B2 and B3 are pivotally attached to the support arm 120 via a four-bar link mechanism (Figs. 13(a)(b)) from the tip of the support arm 120 so as to be swingable. Therefore, regardless of the tilt angle of the support arm, the work platforms B1 to B3 are attached to the support arm so as to maintain a horizontal position (Fig. 14). The horizontally rotating arm 110 can be rotated around a first rotation axis R1 in the center of the platform from a platform storage position S (FIG. 2) extending in the longitudinal direction of the platform to a working position O (FIG. 4) extending in the width direction of the platform. At the working position O, rotated 90 degrees, the end 111 of the horizontally rotating arm 110 extends beyond the vehicle width, and the support arm 120 to which the base 121 is pivotally attached is tilted by a drive cylinder 140 (FIGS. 6 and 7). As shown in FIG. 13(a) and (b), the support arm 120 is a four-joint link mechanism 121 made up of a pair of parallel main arms 121a and auxiliary arms 121b, and multiple work platforms are pivotally attached at regular intervals from the high end to the low base via support links 122. As a result, the support arm 120 is tilted by the drive cylinder 140 via the support link 141 to change its angle, but the work tables B1 to B3 are maintained horizontal at any tilt angle position. Here, the work table B4 is installed at the base of the support arm 120, and the main work table Bn rotates about the rotation axis R2 independently of the horizontal rotating arm 110, but does not follow the tilt of the support arm 120 and does not sway.

[0015] Therefore, in the present invention, the support arm 120 that supports the work platform in a stepped manner relative to the horizontal rotating arm 110 is configured as a tiltable alligator opening type, and the tilt angle α of the support arm 120 relative to the horizontal rotating arm 110 is adjusted by the drive cylinder 140, so that the work platform B1 at the tip high place is located at a high place near the ceiling in the tunnel, and the work platform B4 is located at a low place at the base of the support arm, and the appropriate positions can be easily secured in order from the high place B1 to B2, B3, and B4. In addition, in the present invention, a load is applied from the support arm 120 to the truck via the horizontal rotating arm 110 in the direction of overturning the truck, but a load balancing mechanism is provided so that the load is balanced by the counterweight 113 provided at the end on the opposite side of the horizontal rotating arm 110 and by the work platform Bn.

[0016] Furthermore, the main work platform Bn, which is located in the center of the inspection vehicle's loading platform, is capable of rotating around the second rotation axis R2 independently of the horizontal rotating arm 110 (Figures 8 and 9) and is arranged so that it can slide by a slider along the horizontal rotating arm 110 toward the end 122 protruding in the vehicle width direction (Figures 11 and 12).Therefore, the rotation position of the main work platform Bn works in cooperation with the counterweight 112 to form a load balancing mechanism that has the function of offsetting against the support arm.

[0017] According to the above embodiment, a plurality of work platforms can be arranged from high to low along the inner wall of the tunnel by the tiltable support arm while maintaining the load balance. That is, among the plurality of work platforms B1 to Bn, the main work platform Bn can be horizontally rotated together with the horizontally rotating arm 110 around the first rotation axis R1 at the center of the platform, and is provided so as to be horizontally rotated by the auxiliary arm 110a around the second rotation axis R2 independently of the horizontally rotating arm 110 and to be slidable along the auxiliary arm, while the other work platforms B1 to Bn-1 are supported in a stepped manner at regular intervals from the tip to the base by the support arm 120 which rotates horizontally together with the horizontally rotating arm 110 and tilts in a crocodile-mouth manner with respect to the horizontally rotating arm by the drive cylinder 140. Therefore, first, the horizontally rotating arm 110, which is in the work platform storage position S extending in the longitudinal direction of the platform, is rotated around the first rotation axis R1 in the center of the platform to the working position O extending in the lateral width direction of the platform (FIGS. 1 and 2 to 4 and 5). Then, secondly, the support arm 120 is tilted relative to the horizontally rotating arm 110 until the tip work platform B1 approaches the tunnel ceiling (FIGS. 4 and 5 to 6 and 7). Finally, the main work platform Bn is rotated via the auxiliary arm 110a and slid along the auxiliary arm 110a (FIGS. 6 and 7 to 8 and 9), resulting in the state shown in FIG. 10. Here, the load can be further balanced by sliding and rotating the main work platform Bn. As a result, work platforms B1 to Bn are arranged in a stepped manner from the ceiling high point W·high to the low point W·low on half of the inner wall W of the tunnel T, and multiple workers M1 to Mn at each work platform B1 to Bn will perform inspections simultaneously.

[0018] The present invention is not limited to the embodiment. The gist of the present invention is that a plurality of work tables are swingably mounted on a horizontally rotatable and tiltable support arm mechanism, and the plurality of work tables are arranged from a high place to a low place on the inner wall of the tunnel by the swing and tilt of the support arm, and the support arm is swingably mounted via a four-joint link mechanism, and the work tables are kept horizontal at any tilt position, and further, a counterweight is provided on the opposite side of the horizontally rotating arm to which the support arm is pivotally mounted, and the main work table Bn, which can swing horizontally together with the horizontally rotating arm, can swing and slide horizontally independently of the horizontally rotating arm to balance the load, but a person skilled in the art can modify the present invention without departing from the gist of the present invention.

Claims

[Claim 1] A method in which a plurality of work platforms B1 to Bn are arranged in a stepped pattern along the inner wall of half of a tunnel from the ceiling high point to the side wall low point, and a plurality of workers M1 to Mn ride on each work platform B1 to Bn while traveling on a truck and simultaneously inspect the inner wall W of half of a tunnel T from the ceiling high point W・high to the low point W・low, Among the plurality of work tables B1 to Bn, the main work table Bn is horizontally rotatable together with the horizontal swivel arm 110 around the first rotation axis R1 at the center of the platform, and is provided so as to be horizontally rotatable by the auxiliary arm 110a around the second rotation axis R2 independently of the horizontal swivel arm 110 and to be slidable along the auxiliary arm, while the other work tables B1 to Bn-1 are supported in a stepped manner at regular intervals from the tip to the base by the support arm 120 which rotates horizontally together with the horizontal swivel arm 110 and tilts in a crocodile-mouth manner relative to the horizontal swivel arm by the drive cylinder 140, First, the horizontal rotating arm 110, which is in the work platform storage position S extending in the longitudinal direction of the platform, is rotated around the first rotation axis R1 in the center of the platform to the work position O extending in the lateral width direction of the platform; Secondly, the support arm 120 is tilted relative to the horizontal rotating arm 110 until the tip work platform B1 approaches the tunnel ceiling, Third, the main worktable Bn is rotated via the auxiliary arm 110a and slid along the auxiliary arm 110a; Work tables B1 to Bn are arranged in a stepped pattern from the ceiling high point W・high to the low point W・low on the inner wall W of half of the tunnel T, and multiple workers M1 to Mn on each work table B1 to Bn inspect them simultaneously. The horizontal rotating arm 110 is provided with a counterweight 113 at an end 112 opposite to the support arm pivot end 111, and the main work platform Bn arranged in the center of the inspection vehicle platform is arranged to be rotatable around the second rotation axis R2 via the auxiliary arm 110a independently of the horizontal rotating arm 110 and to be slidable along the horizontal rotating arm 110 toward an end 122 protruding in the vehicle width direction, A truck inspection method characterized in that the lifting load acting on the support arm pivot end 111 of the horizontal rotating arm 110 can be adjusted by the rotation angle of the auxiliary arm 110a relative to the horizontal rotating arm 110 depending on the rotation position of the main work platform Bn, and the left and right widthwise load applied to the truck from the support arm 120 via the horizontal rotating arm 110 is balanced by the cooperation of the pull-down load acting on the support arm pivot end 111 and the pull-down load acting on the end 112 opposite the support arm pivot end 111, which can be adjusted by sliding the counterweight 113 in the width direction.

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