JPH0245728B2 - KYORYOYOTENKENASHIBA - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a bridge inspection scaffold for inspecting, repainting, maintaining and managing the back side of expressways, bridges, etc.

BACKGROUND ART As a conventional bridge inspection scaffold, one is known in which a scaffold that spans the entire width of a bridge is attached to the lower part of a bridge girder so that it can be moved along the bridge. All of these are extremely large-scale and have complex structures. What's more, you have to keep things like this down all the time. Therefore, unnecessary loads are applied to the bridge, which is not only undesirable, but also requires extra members and man-hours to manufacture, which is uneconomical. Moreover, installation on the bridge is time-consuming and inefficient.

In addition, there is a bridge inspection vehicle that can drive on general roads with a walkway attached to it, and the walkway is lowered under the bridge at the site so that the work can be carried out using the walkway as an inspection scaffold. However, using this bridge inspection vehicle is a hindrance to traffic because it remains installed on the bridge during work, and it is difficult to use on bridges that are heavily congested.
It will make it even more crowded.

OBJECT OF THE INVENTION The object of the present invention is to provide a bridge inspection scaffold that eliminates such drawbacks.

Another object is to provide a bridge inspection scaffold that is small, lightweight, and movable in a desired direction behind a bridge.

SUMMARY OF THE INVENTION The present invention has two types of suspension devices attached to the scaffold body. The first suspension device suspends the scaffolding body from the bridge girder or a special rail parallel thereto so that it can travel and is detachable.
The suspension device suspends the scaffolding body from a crossbeam, a tilting structure, or a special rail parallel to it so that it can run and is detachable.

If two types of suspension devices are installed in this way, when moving parallel to the bridge girder, the second suspension device can be removed from the crossbeam or anti-tilt structure, and the scaffold itself can be suspended using the first suspension device. For example, it can be moved to a desired position by a first suspension device, and when moving in a direction perpendicular to the desired position, it can be suspended by a second suspension device, the first suspension device can be removed from a bridge girder, etc., and the second suspension device can be moved to a desired position. The device can be moved to the desired position.

Configuration of the Embodiment The scaffold body 1 of this embodiment is small and only slightly longer than the length of the two bridge girders 3, 3 of the bridge 2, and can be mounted on a normal bridge inspection vehicle 4. It's becoming like that. As is well known, the bridge inspection vehicle 4 has a first boom 5 and a second boom 6, and an auxiliary walkway 7 is rotatably attached to the tip of the first boom 5 and a second boom 6, and the scaffold body 1 can be attached or detached to the tip of the auxiliary walkway 7. It can be installed freely.

The above-mentioned bridge inspection vehicle 4 is a general type, and can be mounted with first and second booms 5, 6, a scaffold body 1, etc. and run on general roads. The first boom 5 is extended diagonally upward, and the second boom 6 attached to the tip is attached to the scaffold main body 1.
can be lowered together with the auxiliary walkway 7, and the auxiliary walkway 7 and the scaffold body 1 can be rotated and arranged at right angles to the underside of the bridge 5.

The scaffold main body 1 of this embodiment includes a first suspension device 8,
8 and second suspension devices 9, 9... are attached. FIG. 1 shows a state in which the scaffold body 1 is carried under the bridge as described above and is attached to dedicated rails 10, 10 provided at the lower ends of the bridge girders 6, 6 using the first suspension devices 8, 8.

The bridge 5 generally has a crossbeam or a body tilt groove 11 outside the bridge girder 6 at right angles thereto, and as described later, this becomes an obstacle when the suspension device 8 moves along the bridge girder. Therefore, a special rail 10 is attached to the lower part of the bridge girder 6 as described above. Therefore, in the case of a bridge with a low crossbeam 11, this dedicated rail 10 is not necessary.

As will be described later, the second suspension device 9 can be detachably attached to the lower part of a trust-like so-called body tilt structure (hereinafter referred to as a crossbeam) 11. The lower part of the crossbeam 11 has two angles attached back to back, and the lower part has a flange shape. If necessary, dedicated rails may also be provided on the crossbeams.

The means for attaching the scaffold body 1 to the auxiliary walkway 7 and the first and second suspension devices will be described in detail below.

The auxiliary walkway 7 and the scaffold main body 1 are both constructed of aluminum profiles so that people can enter and work therein.
By means of attachment means 12 shown in FIG.
It is removably attached to the tip of the.

As shown in FIG. 3, the mounting means 12 in this embodiment includes a bolt 13 having a locking piece at the tip.
, the nut 14 , and the brackets 15 and 16 attached to the butt points of the auxiliary walkway 7 and the scaffold body 1, respectively.
It is composed of: The receiving fitting 16 has an elongated hole in the vertical direction through which the bolt 13 is passed, and has teeth 16a on its rear surface.
A block 17 having teeth meshing with a is placed on top of the block 17, and the bolt 13 is passed through a hole formed in this block 17. On the other hand, the bracket 15
has a groove 15a through which the bolt 13 passes and a locking piece at the tip thereof does not pass through, and a protrusion 15b that prevents the locking piece from coming off. Therefore, the bolt 13 is attached to the receiving bracket 16 of the auxiliary walkway 7, and when installing the scaffold body 1, the locking piece attaches the bolt 13 to the receiving bracket 1.
5 into the groove 15a, place the locking piece under the protrusion 15b, and tighten the nut 14 by turning it with a ratchet handle (not shown). Conversely, when removing the scaffolding main body 1 from the auxiliary walkway 7, the nut 14 may be turned to loosen and the bolt 13 may be removed from the receiving fitting 15.

The first suspension device 8 includes support plates 20, 20 that are erectably attached to bearings 19, 19 provided on a mounting member 18 that is fixedly attached to the handrail 1a of the scaffold main body 1, and surfaces facing each other. Wheels 21, 21 attached to both upper corners of and both support plates 2
It is constituted by a position regulating means 22 consisting of a bolt with a handle and a nut that regulates the distance between the 0 and 20 when they are erected. The spacing between the bearing parts 19, 19 is the same as the second one when the support plates 20, 20 are erected.
As shown, the wheels 21, 21 are selected to ride on the lower flange of the dedicated rail.

As mentioned above, the first suspension device 8 has wheels 21, 2
Since the supporting plates 20, 20 having the supporting plates 1 and 20 are attached to the mounting member 18 so as to be able to stand up freely, they are normally placed lying on the handrail 1a of the scaffold body 1.
To attach this to the dedicated rail 9, place it under the dedicated rail 9, and then
0 is stood up, both cars 21, 21 are placed on the lower flange of the special rail 9, so that they can run on it, and the support plates 20, 20 are moved by the position regulating means 22.
fix the position.

A further embodiment of the first suspension device 8 is shown in FIG. In this embodiment, the handrail 1a of the scaffold body 1
A pair of lower fixing parts 23, 23 attached to
and a pair of upper movable parts 24, 24 which are located above the lower fixed part 23 and are moved up and down, and which move closer to each other when moved upward and move away from each other when moved downward; This upper movable part 24,
24 to the lower fixing parts 23, 23 in a movable manner as described above. A wheel 26 is rotatably attached to the upper movable part 24, and as in the previous embodiment, the upper movable part 2
A position regulating means 27 consisting of a bolt and a nut with a handle is attached to regulate the positions of 4 and 24. Further, small wheels 28 are attached to the upper movable part 24 so as to move in contact with the end of the lower flange of the dedicated rail 10 to prevent rattling when moving by the wheels 26. The small wheel is the fifth
It is also possible to use a wheel having a chain shape and a positional relationship as shown in the figure by 29, and as shown in FIG.
A wheel 30 that rotates while contacting the web of the dedicated rail 10 may be used. Furthermore, instead of using small wheels, wheels, etc., one side of the wheel 26 itself may be made to protrude in an arched manner as shown in FIG. 7, and may be brought into contact with the web of the dedicated rail 10.

As shown in FIG. 8, the second suspension device 9 includes a support plate 33, which is an elongated plate whose tip 34 is bent at a predetermined angle and is attached to the side of the handrail 1a of the scaffold body 1 with a hinge so that it can stand up freely. , a wheel 35 rotatably attached to the tip 34 of this support plate 33.
It is composed of: This support plate 33 is also attached to the other handrail 1a, and when both are erected, both wheels 35, 35 are placed above the flange-like part formed by the angle of the lower part of the crossbeam 11 as described above. It is configured to ride on. That is, the bending angle of the tip portions is such that the tip portions are perpendicular to each other when both support plates 33, 33 are erected. Also, both tips 3
Position regulating means 36 for regulating the position is provided at the lower part of 4, 34. As shown in FIG.
4 and 34, and a turnbuckle 36b which is screwed onto these bolts and can be moved closer and further away by rotation. Also, as shown in Figure 10,
A bolt 37 may be attached to one tip and a screwing means 38 for screwing the bolt 37 to the other. In this case, the bolt 37 is attached to a support 37a that is pivotally supported by the tip 34, and the screwing means 28
It is desirable that the rear end portion of the holder be pivoted to the distal end portion 34.

Therefore, in order to attach this second suspension device to the crossbeam 11, as shown in FIG. Then, the other support plate 34 may be erected and the positions of both may be regulated by the position regulating means 36.

What is shown in FIG. 12 is another embodiment of the second suspension device, in which the support plate 39 has an upright part 39a rising in the same direction as the side surface of the scaffold body 1, and a horizontal part 39b extending horizontally from the tip thereof. and a distal end portion 39c bent at a right angle from the distal end thereof. The distal end portion 39c has a wheel 35 and a position regulating means 36 as described above.

FIG. 13 shows still another embodiment of the second suspension device, in which the upright part and the horizontal part of the support plate shown in FIG. 12 are connected by a link mechanism. In this case, when removed from the crossbeam, it becomes as shown in FIG. 14.

The above-described first and second suspension devices are relative to each other, and it is free to choose which one is the first and which one is the second. For example, as shown in FIG. 15, the first suspension device shown in FIG. 4 can be used as the second suspension device, and the first suspension device shown in FIGS. It will be readily understood that by changing the shape of the support plate 20, it can be used as a second suspension device. Furthermore, the suspension devices shown in FIGS. 8 and 12 can also be used as the first suspension device with slight modification.

Effects of the Embodiment The scaffold body 1 of this embodiment is mounted on the bridge inspection vehicle 4, so it is transported to the work site when necessary.
At the site, it is brought under the bridge 2 along with the auxiliary walkway 7 using the first and second booms 5 and 6, like a normal bridge inspection vehicle. Next, both support plates 20 of the first suspension device are raised, the wheels 21 are placed on the lower flange of the dedicated rail, and the position regulating means 22 is placed on the lower flange of the dedicated rail.
The location is regulated. Since the wheels 21 are located on the lower flange and their positions are regulated by the position regulating means 22, the scaffold body 1 can be suspended. Next, when the nut 13 of the locking mechanism is loosened and the bolt 12 is removed, the scaffold body 1 is separated from the bridge inspection vehicle 4. After that, the bridge inspection vehicle 4 is no longer needed, so the auxiliary walkway 7 is mounted again and moved from the bridge 5 so that it does not obstruct traffic. Since the first suspension device 8 has wheels 21 as described above,
The scaffold body 1 can be moved to a desired position along the dedicated rail 9. Since the second suspension device 9 is not used for the movement along the bridge girder 33, it remains suspended downward as shown. This is used when moving in a direction perpendicular to the bridge girder 3.

Movement using this second suspension device will be explained with reference also to FIG. 16. Although FIG. 16 is an example shown in FIGS. 2 and 3, the other cases are exactly the same.

Figure 16A shows the auxiliary walkway 7 separated from the state shown in Figure 1. The second suspension devices are attached at four locations, two at both ends and between the first suspension device. They are designated A, B, C, and D in order from the right side in the drawing. To attach these to the crossbeam 11, as described above, both support plates 33, 33 may be erected, and the positions of the wheels 35, 35 may be regulated by the position regulating means 36.

First, attach A and C to the crossbeam. Remove the first suspension devices 8, 8 (b). Next, wheels 35, 35
to move it along the crossbeam (c). Since there is a bridge girder 3, it cannot be moved any further. Then, attach B and D to the crossbeam 11 (d). Then remove A and C (e). B and D therefore allow the first suspension devices 8, 8 to be moved until they reach the next bridge girder. Then, the first suspension devices 8, 8 are attached to the bridge girder again (f). If necessary, you can repeat the same process to move it to the right side of the drawing. In this way, the scaffold body 1 is moved in a direction perpendicular to the bridge girder.

Effects of the Invention As explained in detail above, according to the present invention,
Two types of suspension devices allow the scaffold body to be moved in the direction along the bridge girder and in the direction perpendicular to it, so even if it is small, it can easily move the entire back side of the bridge.
Able to work quickly.

Further, according to the present invention, the structure of the suspension device attached to the scaffold body is extremely simple and can be operated reliably, making it safe and at the same time extremely low manufacturing cost.

Since it is smaller and lighter than conventional scaffolding that spans the entire width of a bridge, it is easier to manufacture and carry into and out of the bridge, and does not place any extra burden on the bridge.

Furthermore, if it is similarly made smaller and lighter, it can be mounted on a bridge inspection vehicle and transported, and it can also be separated from the bridge inspection vehicle. It does not cause

Furthermore, if a dedicated rail is used, if a special rail for movement is provided on the outside of the pier or its hollow part, and connected to the dedicated rail at the bottom end of the bridge girder or the bottom end of the crossbeam, the pier can be moved without any problem. It is possible to perform work such as inspection of an entire bridge using one inspection scaffold.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the installed state of an embodiment of the present invention, FIG. 2 is a side view of the butt point between the scaffolding main body and the auxiliary walkway, FIG. 3 is a perspective view of the same location, and FIG. The figure is a perspective view of a suspension device of another embodiment,
5, 6, and 7 are side views showing the relationship between wheels, small wheels, and dedicated rails, FIG. 8 is a side view of a suspension device according to another embodiment, and FIG. 8 is a sectional view of the position regulating means, FIG. 10 is a sectional view of another position regulating means, FIG. 11 is a perspective view of FIG. 8, and FIG. 12 is a side view of yet another suspension device.
13 and 14 are side views of still other suspension devices, FIG. 15 is a perspective view of an embodiment in which the suspension device of FIG. 4 is used as a second suspension device, and FIG. 16 is a side view of another suspension device. FIG. 4 is a schematic diagram for explaining a state in which the embodiment of the invention is moved in a direction perpendicular to a bridge girder. 1: Scaffolding body, 3: Bridge girder, 8: First suspension device, 9: Second suspension device, 10: Dedicated rail, 1
8: Mounting means, 20, 33: Support plate, 21, 2
6, 35: Wheel, 23: Lower fixed part, 24: Upper movable part.

Claims (1)

[Scope of Claims] 1. A scaffolding body on which a person can work, and a first suspension device that suspends the scaffolding body from a bridge girder or a dedicated rail parallel to the bridge girder so that it can travel and is detachably suspended. and a second suspension device that suspends the scaffold body from a cross beam or a dedicated rail parallel thereto in a movable and detachable manner. 2. The bridge inspection scaffold according to claim 1, wherein the first suspension device has running wheels attached to opposing surfaces of a pair of support plates that can be erected. 3. The bridge inspection scaffold according to claim 1, wherein the second suspension device has running wheels attached to opposing surfaces of a pair of support plates that can be erected. 4. The first suspension device body moves up and down a pair of lower fixed parts, a pair of upper movable parts to which running wheels are respectively attached, and when the upper movable parts move upward, the running wheels approach each other. The bridge inspection scaffold according to claim 1, further comprising a link mechanism attached to the lower fixing part so as to do so. 5. The second suspension device body moves up and down a pair of lower fixed parts, a pair of upper movable parts to which running wheels are respectively attached, and when the upper movable parts move upward, the running wheels approach each other. The bridge inspection scaffold according to claim 1, further comprising a link mechanism attached to the lower fixing part so as to do so.