JP7031854B2 - Scaffolding for inspection of utility tunnel - Google Patents

Description

The present invention relates to a tunnel-shaped utility tunnel through which a power cable, a communication cable, a drainage pipe, etc. are passed, or a drainage channel for guiding sewage, rainwater, gushing groundwater, etc. (hereinafter, these are simply referred to as a utility tunnel. In the document, the utility tunnel refers to an inspection scaffold installed in the lower center of the common groove (which includes the drainage channel in addition to the common groove), and a mounting bracket for mounting the scaffold inside the common groove.

For tunnels through which vehicles pass, the floor structure under the tunnel is often constructed by placing concrete or concrete blocks, but it is also known that the floor structure is constructed by constructing precast members in order to save labor in construction. Patent Document 1 discloses a floor structure including inverts and side walls constructed at the bottom and both sides of a tunnel, columns vertically installed on the invert, both side walls, and a floor slab laid horizontally on the columns. ing.

Patent Document 2 discloses a tunnel for laying various cables such as electric power lines and for maintenance management when operating a cable tunnel, which is composed of a segment in which a concrete is placed in an invert portion or a pedestal is constructed by a precast concrete block. ing.

JP 2006-152746 Japanese Patent Application Laid-Open No. 10-339097

In the tunnel disclosed in Patent Document 1, it is necessary to prepare and construct many members such as inverts, side walls, columns, and floor slabs in order to construct the floor structure, and the structure is complicated and the construction is complicated. In this respect, in the tunnel disclosed in Patent Document 2, the pedestal has a simple structure and is easy to construct, but when it is constructed by placing concrete, it is particularly difficult to construct a pedestal with a drainage hole. It takes time and effort to construct, and if the drainage hole is clogged with dust or the like, it is not easy to clean and remove it. Also, if the pedestal is constructed from precast concrete blocks, one must be prepared according to the size of the tunnel segment.

An object of the present invention is to provide an inspection scaffold for a utility tunnel that is simple in structure and construction, can be constructed in a tunnel of any size, and can be drained, and a mounting bracket for mounting the scaffold. do.

The inspection scaffold of the invention according to claim 1 is a utility tunnel or drainage channel inspection scaffold composed of a utility tunnel or a groove lid placed in the lower center of the drainage channel, and the groove lid is one. The side end is connected to a utility tunnel or drainage channel segment by a first fastening means including a hinge that pivotally supports the groove lid upward and the other side end is placed on the segment. Characterized by
The invention according to claim 2. The invention according to claim 1 is characterized in that at least one side end portion of both side end portions is fastened and fixed to a common groove or a drainage channel segment by the first fastening means. do.

The title of the invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2 , the groove lid is grating .

The invention according to claim 4 is a mounting bracket for mounting a groove lid in the inspection scaffold of the invention according to claim 1, and includes receiving frames on both sides of the bracket on which the side ends of the groove lid are placed. Moreover, at least one of the receiving frames on both sides is fixed to the segment of the utility tunnel or the drainage channel by the second fixing means.
The invention according to claim 5 is the invention according to claim 4 , wherein the second fastening means for fastening the receiving frame on one side of the mounting bracket to the segment pivotally supports the mounting bracket upward. The receiving frame at the other end of the mounting bracket, including the hinge, is mounted on the segment.

According to the inspection scaffold of the invention according to claim 1, regardless of the size of the utility tunnel, the groove lid is simply placed in the lower center of the utility tunnel, and both ends of the utility tunnel are curved tunnels. It can be attached while being supported by the segment, and if the edges at both ends of the groove lid bite into the segment, it will not move carelessly and will be maintained in a fixed state. Further, the recess formed by the curved segment under the groove lid can be used as a drainage channel, and no special structure or construction for securing the drainage channel is required. Moreover, since the groove lid is simply placed, it can be lifted and removed, and by removing it, the drainage channel can be easily cleaned. Moreover, the groove lid can be opened and closed by a hinge provided at one side end, and the drainage channel under the groove lid can be easily cleaned by lifting and opening the other side end.

According to the second aspect of the present invention, the groove lid is fixed to the segment of the utility tunnel by the first fastening means and does not move during the inspection work, so that the work can be performed stably.

According to the third aspect of the present invention, the weight of the groove lid is reduced, and the state of dust accumulation in the drainage channel can be easily confirmed through the groove lid.

According to the invention of claim 4 , the mounting bracket is fixed by fastening at least one of the receiving frames provided on both sides of the mounting bracket to the segment by the second fastening means, and the one receiving frame is fixed. If fixed, it is not necessary to individually fasten the receiving frames on both sides, and the labor for fastening can be halved.

According to the invention of claim 5 , the mounting bracket can be opened and closed by the hinge at one side end, and by lifting and opening the receiving frame on the other side together with the groove lid, the receiving frame on the other side does not get in the way and the groove lid is not obstructed. Cleaning work of the lower drainage channel can be easily performed.

Top view of grating (groove lid). An enlarged plan view of a main part of the grating shown in FIG. The same sectional view. The front view of the grating shown in FIG. 1 attached to the segment of the utility tunnel. The perspective view of the grating shown in FIG. 1 attached to the segment of the utility tunnel. The front view which shows the state which raised one side of the grating shown in FIG. Top view of another aspect of grating (groove lid). The front view of the grating shown in FIG. 7 attached to the segment of the utility tunnel. The figure which shows the state which constructed in the inclined utility tunnel. Schematic diagram showing another embodiment in which a groove lid (grating) is attached to a segment of a utility tunnel. Top view of the mounting bracket. FIG. 11 is a cross-sectional view taken along the line AA of the mounting bracket shown in FIG. 11 anchored to the segment of the utility tunnel. An enlarged plan view of a main part of the mounting bracket shown in FIG. 11 mounted on the segment. The same sectional view. FIG. 11 is a plan view in which a pair of gratings are mounted on the mounting bracket shown in FIG. An enlarged plan view of a main part of FIG. The same sectional view. The front view of the grating shown in FIG. 15 anchored to the segment of the utility tunnel. The same perspective view.

FIG. 1 is an example of a groove lid used as a scaffold for inspection of a common groove, and shows a grating 1 provided with a first fastening means excluding an anchor bolt described later, and the gratings 1 are arranged at regular intervals. The thin plate-shaped bearing bar 1a to be installed, the end plate 1b connecting both ends of the parallel bearing bar 1a, and the end plate 1b parallel to the end plate 1b and orthogonal to the bearing bar 1a to connect the bearing bar 1a. The twist bar 1c is formed, and the mounting plates 3 are fixed to the left and right end plates 1b at the front and rear inside, that is, at the four corners of the grating 1 by welding, for example, on the back surface of the bearing bar.

As shown in FIG. 2, the mounting plate 3 is fixed to each bearing bar 1a from the end to the fourth bearing bar 1a between the end plate 1b and the twist bar 1c from the front side, and a pair of elongated holes 4 are formed. It is located between the bearing bars on both sides of the bearing bar 1a and is formed in parallel along the bearing bar 1a.

As shown in FIG. 3, a position adjusting plate 5 is applied to each mounting plate 3 on the back surface thereof, and each position adjusting plate 5 has a bolt through hole 6 at a position corresponding to the elongated hole 4. ing.

The mounting plate 3 and the position adjusting plate 5 are formed by a bolt 7 that is passed through a long hole 4 of the mounting plate 3 and a bolt through hole 6 of the position adjusting plate 5 from above, and a bolt end that protrudes from the bolt through hole 6 of the position adjusting plate 5. The position adjustment plate 5 is connected by a nut 8 screwed into, and the position adjustment plate 5 can be adjusted in the direction of the arrow in FIG. 3 with the nut 8 loosened. It can be done within the range that can move in the longitudinal direction.

The bolt through hole 6 is formed as a stupid hole having a diameter larger than the shaft diameter of the bolt 7, whereby the bolt 7 can move back and forth and left and right within the range of the stupid hole, and the position adjusting plate 5 is front and rear in FIG. The position may be adjusted to the left or right.

A backing plate 11 is connected to the protruding end of the position adjusting plate 5 protruding from the mounting plate 3 via a hinge 9 on the back surface, and of the backing plates 11 on both the left and right sides, the front and rear backing plates 11 on one side (FIG. In No. 1, the front and rear backing plates 11) on the right side are fixed to the segment 13 of the utility tunnel by anchor bolts 14. 12 in FIG. 1 shows a hole for an anchor bolt formed in the backing plate 11.

The anchor bolt 14 constitutes a first fastening means together with a mounting plate 3, a position adjusting plate 5, a hinge 9, and a backing plate 11. The first fastening means includes a mounting plate 3, a position adjusting plate 5, and a hinge. 9. Of the backing plate 11 and the anchor bolt 14, some of the other components other than the anchor bolt 14 can be omitted, and the anchor bolt 14 can be directly attached to the glazing 1 by some mounting means. good. In this case, therefore, the first fastening means is composed of the anchor bolt 14 and some mounting means for mounting the anchor bolt 14 to the grating 1.

The front and rear backing plates 11 on the other side (the front and rear backing plates 11 on the left side in FIGS. 1 and 4) are supported in a state of being pressed onto the segment.

In the state of FIG. 4, the grating 1 is used as a scaffold for inspection, and the recess 16 formed by the segment 13 under the grating functions as a drainage channel.
FIG. 5 shows the mounting state of the grating 1.

When dust collects in the recess 16 through the grating 1 and the function as a drainage channel is impaired and the drainage channel needs to be cleaned, the other side of the grating 1 is lifted in the direction of the arrow (FIG. 6) to raise the grating 1. The recess 16 is opened.

In the above embodiment, the mounting plate 5 and the position adjusting plate 5 are attached to the glazing 1 used as the scaffold for inspection, the backing plate 11 is attached to the position adjusting plate 5 via the hinge 9, and the backing plate 11 on one side is anchor bolted. 14 shows an example of fixing to the segment 13 of the common groove. In the embodiment shown in FIGS. 7 and 8, the groove lid (glazing) 18 used as the scaffold for inspection is on both the left and right sides as shown in FIG. The leg portions 19 are provided so as to project downward from the front and rear of the above, and the mounting plate 21 is fixed to the lower end of each leg portion 19 with, for example, bolts. Are rotatably connected, and the backing plate 11 on one side (right side in FIG. 8) is fastened to the segment 13 of the common groove by the anchor bolt 14.

In the present embodiment, the leg portion 19, the mounting plate 21, the hinge 9, the backing plate 11, and the anchor bolt 14 constitute the first fastening means for fastening the groove lid (grating) 8 to the segment 13. The mounting plate 21 may be directly mounted on the grating 18 by omitting the portion 19, or the anchor bolt 14 may be directly mounted on the grating 18 by some mounting means as described above. In these cases, therefore, the mounting plate 21, the hinge 9, the backing plate 11, the anchor bolt 14, or the anchor bolt 14 and some mounting means constitute the first fastening means.

When the utility tunnel has a gradient as shown in FIG. 9, the long and short legs 23 and 24 are combined to make the groove lid (grating) 16 horizontal, and the groove lid (grating) 1 as a scaffold is used. It can be configured in a staircase pattern.

In another embodiment, the groove lid (grating) 26 is placed directly on the segment 13 of the utility tunnel (FIG. 10). In this embodiment, the recess 16 on the curved segment 13 under the grating serves as the drainage channel. Further, in this embodiment, the fastening means for fixing the grating 26 to the segment 13 is not used, but the grating 26 is displaced in the left-right direction of FIG. 10 by locking the edges e at both ends of the grating 26 to the segment 13. Even if it tries to move, the edge e bites into the segment 13 and the movement is blocked.

11 and 12 show a groove lid mounting bracket 28 used as an inspection scaffold, FIG. 11 is a plan view, FIG. 12 is a cross-sectional view taken along the line AA of FIG. 11, and the mounting bracket 28 is a vertical portion 29a. A receiving frame 29 composed of a horizontal portion 29b and a horizontal portion 29b is provided on both the left and right sides. The mounting bracket 28 in the illustrated embodiment has a frame-like structure in which the left and right receiving frames 29 are connected to each other by a connecting plate 31 in the front-rear direction.

As shown in the enlarged view of FIG. 12, the horizontal portions 29b of the left and right receiving frames 29 are fixed by applying the horizontal portions 29b of the corresponding portions to the side edges of the horizontal portions 22b on both sides of the excised portion from the back side. A pair of elongated holes 4 are formed in the mounting plate 31 which is preferably fixed and hung by welding, as in the mounting plate 3 of the embodiment. Each of the elongated holes 4 is located between the bearing bars 1a constituting the grating 29 used as the groove lid, as in the above-described embodiment, in the state shown in FIG. 15 in which a pair of gratings 29 are mounted side by side on the mounting bracket 28. 16), extending in parallel along the bearing bar 1a.

Similar to the mounting plate 3 of the embodiment, the position adjusting plate 5 is mounted on the mounting plate 32 by bolts 7 and nuts 8 so as to be position-adjustable in the direction of the arrow in FIG. A backing plate 11 is attached to the side end of the plate 5 via a hinge 9. Then, the backing plate 11 is fastened to the above-mentioned segment 13 by the anchor bolt 14 as in the above embodiment. Since the backing plate 11 is rotatably supported by the position adjusting plate 5 by the hinge 9, the backing plate 11 can be tilted and attached to a common groove of any size corresponding to the inclination of the segment. ..

In the present embodiment, the mounting plate 31, the position adjusting plate 5, the hinge 9, the backing plate 11, and the anchor bolt 14 constitute a second fastening means for the mounting bracket. As for the second fastening means, as in the case of the first fastening means described above, a part of the other components other than the anchor bolt 14 can be omitted, and the anchor bolt 14 is attached by some means. The metal fitting 28 may also be directly attached. In this case, the second fastening means is composed of an anchor bolt 14 and a mounting means for mounting the anchor bolt 14 to the mounting bracket 28.

FIG. 18 shows a front view of an example in which a groove lid 1 made of grating is attached to a receiving frame 29 of a mounting bracket 28 fastened to a segment 13 by a second fastening means including an anchor bolt 14. 19 is the same perspective view, and in the embodiment shown in FIG. 18, the left and right backing plates 11 are respectively fastened to the segment 13 by anchor bolts 14, whereby the mounting bracket 28 is fixed to the segment 13. However, since the groove lid 1 can be removed only by being attached to the left and right receiving frames 29, when cleaning the drainage channel under the groove lid, the groove lid 1 is lifted from the mounting bracket 28 and removed. Will be done.

Of the backing plates 13 mounted on the left and right receiving frames 29 of the mounting bracket 28, only one of the backing plates 13 is rotatably attached to the shaft by the hinge 9, and the other backing plate 13 is only pressed against the segment 13 to be an anchor. It does not have to be fixed to the segment 13 by bolts 14. As a result, the mounting bracket 28 can be opened and closed, and the side not fixed to the segment 13 may be lifted together with the groove lid 1 to open the drainage channel.

The inspection scaffold according to the present invention can be used in the above-mentioned utility tunnel through which a power cable, a communication cable, a drainage pipe, etc. are passed, and a tunnel-shaped drainage that guides drainage of sewage, rainwater, gushed groundwater, etc. It can also be used as a scaffold on the road when the amount of drainage is small and it is not soaked in the drainage.

1, 26, 29 ... Grating (groove lid)
3, 32 ・ ・ Mounting plate 4 ・ ・ Long hole 5 ・ ・ Position adjustment plate 6 ・ ・ Bolt through hole 7 ・ ・ Bolt 8 ・ ・ Nut 9 ・ ・ Hinge 11 ・ ・ Support plate 13 ・ ・ Segment 14 ・ ・ Anchor bolt 16 ・ ・ Recessed part 19 ・ ・ Leg 23, 24 ・ ・ Leg 28 ・ ・ Mounting bracket 29 ・ ・ Receiving frame 31 ・ ・ Connecting plate

Claims (5)

A utility tunnel or drainage channel inspection scaffold consisting of a utility tunnel or a drainage lid placed in the lower center of a tunnel-shaped utility tunnel or drainage channel. For inspection of utility tunnels or drainage channels, characterized in that the groove lid is connected by a first fastening means including a hinge that pivotally supports it upwards and the other end is mounted on the segment . scaffold. The common groove according to claim 1, wherein at least one side end of both side ends of the groove lid is fastened and fixed to a common groove or a segment of a drainage channel by the first fastening means. Or a scaffold for inspection of drainage channels. The scaffold for inspection of a utility tunnel or a drainage channel according to claim 1 or 2 , wherein the groove lid is grating. A mounting bracket for mounting a groove lid in the inspection scaffold according to claim 1, wherein the bracket is provided with a receiving frame on which the side ends of the groove lid are placed on both sides of the bracket, and at least one side of the receiving frames on both sides. A mounting bracket, characterized in that the receiving frame is fastened to a utility tunnel or a drainage channel segment by a second fastening means. The second fastening means for fastening the receiving frame on one side of the mounting bracket to the segment includes a hinge that pivotally supports the mounting bracket upward, and the receiving frame at the other end of the mounting bracket is the segment. The mounting bracket according to claim 4 , wherein the mounting bracket is mounted on the top.

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