JPH0320328Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bridge inspection vehicle used for maintenance and inspection of elevated roads, etc.

With the development of automobile-only roads and expressways, the number of elevated roads is increasing. For such roads, prompt and reliable maintenance and inspection are important in order to maintain the safety of the wide-area road network. For this purpose, various inspection vehicles have been proposed and provided. As an example of this, a swivel base is rotatably provided on the vehicle body, an elevating boom is pivoted to the swivel base, and a saddle is pivoted to the tip of the elevating boom, so that the vertical boom can move up and down within the saddle. There is an inspection vehicle with an inspection walkway pivotally attached to its lower end. This inspection vehicle normally holds its elevating boom, vertical boom, and inspection walkway in parallel with each other and holds them approximately horizontally on the vehicle body, and moves by itself to a desired inspection position. In addition, when performing maintenance inspections, the elevating boom is erected diagonally, the saddle is pivoted to orient the vertical boom so that it can be raised and lowered vertically, and the inspection walkway is pivoted to a horizontal position to prepare it. This system enables maintenance and inspection from the optimum position by rotating the boom, raising and lowering the elevating boom, raising and lowering the vertical boom, and rotating and extending and contracting the inspection walkway in a horizontal state.

However, elevated roads often have sound insulation walls on the sides of the road, and because these walls are relatively high, it is difficult for conventional inspection vehicles to cross the sound insulation walls from the road and perform maintenance inspections on the sides and bottom of the bridge. There are many cases. Furthermore, when inspecting from the road below the bridge, fences are often installed and get in the way, making inspection work difficult. This is primarily due to the relatively small pivot angle, since pivot drive mechanisms conventionally generally rely on a single hydraulic cylinder arrangement. In addition, because the pivot angle is small, the operation control procedure becomes complicated to perform maintenance and inspection while avoiding obstacles such as noise barriers and fences, which not only impedes prompt maintenance and inspection, but also hinders traffic. It is also becoming an obstacle and causing traffic jams.

The purpose of the present invention is to provide a bridge inspection vehicle that eliminates the problems with the conventional inspection vehicles described above, has excellent workability, and enables quick and reliable maintenance and inspection.

To this end, the present invention provides a bridge inspection vehicle equipped with a swivel platform, an elevating boom, a saddle, a vertical boom, and an inspection walkway as described above, in which one end is attached to the elevating boom in order to significantly increase the pivot angle of the saddle. The other end of the cylinder body or poston rod of the pivotably mounted delivery hydraulic cylinder is pivotally connected to the deflection hydraulic cylinder whose one end is pivotally mounted to the saddle, and the pivot connection and the saddle for the elevating boom are connected. The pivoting seats of the vertical boom are connected by guide links to greatly increase the pivoting angle of the saddle, and the inspection walkway is pivoted to a support structure rotatably attached to the tip of the vertical boom. The walkways are made to be extendable and retractable by sliding on each other, and are equipped with a trolley that can be moved in the longitudinal direction of the walkway, and an inspection platform that can be raised and lowered on the trolley. It is characterized by

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 each show an embodiment of a bridge inspection vehicle according to the present invention in its inspection work state. In this bridge inspection vehicle, a swivel base 2 is mounted on a self-propelled vehicle 1 so that the rotation can be controlled. This rotation control is performed by a gear system (not shown) as is well known, and is designed to allow 360° rotation within a horizontal plane. The swivel base 2 is equipped with an elevating boom 3 that can be controlled to raise and lower. That is, one end of the elevating boom 3 is pivotally connected to the swivel base 2, and is driven to rise and fall by a fluid pressure cylinder device 4 (FIG. 3). This elevating boom 3 is the base end boom 3A
and tip boom 3B, tip boom 3B
is slidably housed within the proximal boom 3A, and is extendable and retractable by a suitable drive device (not shown).

Elevation boom 3, here tip boom 3B
A saddle 5 is pivotally attached to the tip of the saddle 5 by a pivot shaft 6. The saddle 5 is a hollow member, into which a vertical boom 7 is slidably inserted. This vertical boom 7 can be driven longitudinally within the saddle 5 by a drive motor 8 via suitable gearing (not shown).

A support structure 9 is provided at the lower end of the vertical boom 7 , and an inspection walkway (hereinafter referred to as walkway) 10 is pivotally attached to this by a pivot shaft 11 . Support structure 9
is rotatably attached to the vertical boom 7 so that the walkway 10 can be rotated around the vertical boom 7. The walkway 10 is pivoted about a pivot shaft 11 by a hydraulic cylinder device 12. Here, the walkway 10 includes a base walkway part 10A and a tip walkway part 1.
0B, and the distal end walkway portion 10B can be driven to extend and retract along the base end walkway portion 10A by a suitable drive motor, manual winch (not shown), or the like. Furthermore, a cart 13 is mounted on the leading end walkway portion 10B so as to be movable in the longitudinal direction thereof. For this purpose, a suitable rail is placed on the floor surface,
Guide provided. This trolley 13 does not have any particular driving device, and can be moved and fixed by hand by a worker as necessary. Trolley 13
An inspection table 14 is provided at the top so that it can be raised and lowered.
Here, a first post 15 is erected on a cart 13, a second post 16 is provided so as to be slidable up and down along this first post 15, and an inspection table 14 is further provided along the second post 16. It is provided to be slidable up and down, and the inspection table 14 is moved up and down by a suitable chain drive mechanism (not shown).

A feature of the present invention in the bridge inspection vehicle having the above-described structure is that two hydraulic cylinders, that is, a sending hydraulic cylinder 20 and a bending hydraulic cylinder 21, are provided for pivotally driving the saddle 5. They form a unique working link. That is, the delivery hydraulic cylinder 20 here consists of a pair of left and right cylinders, and one end of each cylinder body is pivotally supported by the tip boom 3b of the elevating boom 3 by a pivot shaft 22. On the other hand, the bending cylinder 21 has a poston rod 21A with a pivot shaft 2 provided on the left and right sides of the saddle 5.
It is pivoted to 3. This refraction cylinder 21
is equipped with a pivot shaft 24, and this pivot shaft 2
4, the tip of the piston rod 20A of the delivery cylinder 20 is pivotally connected to the piston rod 20A. Both cylinders 20, 2 pivotally connected in this way
A guide link 25 pivotally connects the pivot shafts 6 and 24 to maintain the same relative positional relationship.

According to the fluid pressure cylinder mechanism having such a configuration, the bending cylinder 21 and the guide link 2 are expanded and contracted by the delivery fluid pressure cylinder 20.
5, the position of the pivot point 24 is changed, thereby causing the saddle 5 to pivot about the pivot axis 6. This pivot angle range is defined by the extension and retraction stroke of the delivery hydraulic cylinder 20. The present invention further includes a refraction fluid pressure cylinder 2.
1, the saddle 5 is further pivoted about the pivot shaft 6 by this telescoping operation. In this way, the saddle 5 is attached to both cylinders 2
The cooperative action of 0 and 21 results in a synergistic large pivot angle. It will be clear that this pivot angle is significantly increased compared to the case of a single cylinder mechanism corresponding to the delivery hydraulic cylinder 20 in the prior art.

A preferred embodiment of this hydraulic cylinder mechanism will be described with reference to FIGS. 4 and 5. The delivery fluid pressure cylinders 20 are arranged along both sides of the tip boom 3B of the elevating boom 3, and are configured as a set of two cylinders. In FIG. 5, the piston rods 20A are shown in the most retracted state, but these piston rods 20A are attached to a pivot that is integrally assembled on both sides of the cylinder body of one bending fluid pressure cylinder 21 arranged in the middle. It is pivotally connected to a support shaft 24 . A piston rod 21A of the bending hydraulic cylinder 21 is pivotally connected to a pivot shaft 23 fixed to the saddle 5.
The guide links 25 are also configured as a set of two,
One end of the piston rod 20A of the delivery hydraulic cylinder 20 is pivotally connected to the pivot shaft 24 from the outside, and the other end is pivotally connected to the pivot shaft 6 which is the mounting shaft of the saddle 5.

In this way, the delivery fluid pressure cylinders 20 are arranged on both sides of the refraction fluid pressure cylinder 21,
Furthermore, according to the configuration in which the guide links 25 are arranged on the outside of each of the guide links 25, the saddle 5 can be moved up and down by the elevating boom 3 without interfering with each other, as is clear from FIG.
Pivot shaft 6 at a rotation angle of approximately 300° from the state parallel to
It can be pivoted around. Such a large rotation angle can only be achieved by the above-mentioned cylinder mechanism of the present invention.

Therefore, as will be described later, during actual maintenance and inspection work, the vertical boom 7 must be moved over obstacles such as noise barriers and fences.
It becomes extremely easy to raise and lower the machine, and as a result, work efficiency is greatly improved so that the work time for maintenance and inspection can be shortened. Therefore, it is possible to eliminate as much as possible the possibility of traffic jams, etc.

Figures 6 to 11 are for actual maintenance and inspection.
This figure shows the operation control procedure when performing maintenance and inspection of the underside of the bridge girder from the road below the bridge. This bridge inspection vehicle normally carries each boom 3 and 7 as shown in Figure 6.
The walkways 10 are folded and stored in parallel with each other, and the walkways 10 are self-propelled to a desired position. After reaching the destination point, fix the outrigger 30 as shown in Figure 7,
After that, the elevating boom 3 is driven to stand up at an appropriate angular position. Along with this, vertical boom 7 and walkway 1
0 is also raised at the same time. Next, as shown in FIG.
0 and the bending fluid pressure cylinder 21, it is pivoted to a horizontal position and then to a vertical position as shown in FIG. Afterwards, as shown in Figure 10, the corridor 1
0 to the horizontal position and the worker gets on the walkway 10, then as shown in FIG. Perform inspection. In the case where the micrometer 40 is a nuisance as shown in FIG. 11, the inspection table 14, which can be raised and lowered, is extremely advantageous.

To perform maintenance and inspection of the underside of the bridge from the road surface on the bridge, rotate the swivel base 2 from the state shown in FIG. 10 as shown in FIGS. 12 and 12A, and at the same time move the support structure 9 in the opposite direction. The corridor 10 is maintained parallel to the vehicle body by rotating by the same angle. By this rotation of the swivel base 2, the vertical boom 7 is projected to the side of the road beyond an obstacle such as a sound insulating wall, as shown in FIG. Thereafter, the vertical boom 7 is lowered, the walkway 10 is further rotated, and the walkway 10 is extended as necessary as shown in FIGS. 13 and 14 to perform maintenance and inspection.

During such work, the mechanism of the sending and refracting fluid pressure cylinders 20, 21 and the guide link 25 according to the present invention allows the pivot angle of the vertical boom 7 to be significantly increased, which improves work efficiency. As mentioned above, it is clear that the effects can be obtained.

It should be noted that the present invention is not limited to the illustrated embodiment, and for example, the delivery fluid pressure cylinder may be arranged with the piston in the opposite direction from the illustrated example. In addition, instead of rotating the walkway by rotating the support structure, it is also possible to attach a vertical boom to the saddle so that it can move up and down and rotate.

[Brief explanation of the drawing]

FIG. 1 is an elevational view showing a bridge inspection vehicle according to the present invention in a state in which a bridge is being inspected from an elevated road, particularly in a state in which an inspection is carried out over a high sound insulating wall. FIG. 2 is an elevational view similar to FIG. 1 showing the inspection walkway of the bridge inspection vehicle in an extended state. Figure 3 is a front view showing the bridge inspection vehicle in a state where the elevation boom, vertical boom, and inspection walkway are operated. FIGS. 4 and 5 are enlarged views showing the hydraulic cylinder mechanism that drives the saddle. FIGS. 6 to 10 are schematic elevational views showing the operating stages of each part for inspection by a bridge inspection vehicle. FIG. 11 is an elevational view showing the state in which an elevated road bridge is inspected from above a general road. 12th
12A and 13 are elevational views and plan views showing the stages of preparation for inspection from above the elevated road. FIG. 14 is an elevational view showing how the bridge is inspected from above the elevated road. 1... Self-propelled vehicle, 2... Swivel base, 3... Elevation boom, 4... Fluid pressure cylinder device, 5 Saddle, 6
... Pivot shaft, 7 ... Vertical boom, 8 ... Drive motor, 9 ... Support structure, 10 ... Inspection walkway,
11...Pivot shaft, 12...Fluid pressure cylinder device, 13...Dolly, 14...Inspection stand, 15, 16
... Post, 20 ... Fluid pressure cylinder for sending out, 21 ... Fluid pressure cylinder for bending, 22,2
3, 24... Pivot shaft, 25... Guide link.

Claims (1)

[Scope of utility model registration request] A swivel base rotatably supported on the vehicle body, a multi-stage elevating boom whose base end is pivotally supported on the swivel base and whose tip side is undulating, and is pivoted at the tip of the elevating boom. a vertical boom installed in the saddle so as to be reciprocally driven, and an inspection walkway installed at the tip of the vertical boom, with one end pivoted to the tip boom of the elevating boom. The other end of the cylinder body or piston load of the cylinder is pivotally connected to a refracting hydraulic cylinder having one end pivotally connected to the saddle, and the pivotally connecting portion and the pivoting portion of the saddle to the elevating boom. are connected by a guide link, furthermore, the inspection walkway is pivotally supported by a support structure rotatably attached to the tip of the vertical boom, and the inspection walkway is composed of a plurality of walkway sections, Bridge inspection characterized in that these walkway sections are slidable relative to each other to be extendable and retractable, a carriage movable in the longitudinal direction is provided thereon, and an inspection platform is provided on the carriage so as to be movable up and down. car.