JPH0421850Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] Industrial application field The present invention relates to a bridge inspection device used when inspecting elevated bridges on the sea, rivers, expressways, etc. and other work. This invention relates to a pier detouring type bridge inspection device, in which a driving cart is movably mounted on a guide rail provided on a haunch part of a body, and a walkway is moved by turning, sliding, etc. when passing a pier, and the pier can be passed through the pier without obstruction.

Conventional technology Conventionally, when inspecting a bridge body, a bridge inspection vehicle with a walkway suspended from a car that can be driven on the road is used, and at the location where work is to be done, the vehicle is fixed to the roadside, the suspended walkway is lowered, and Workers began to work on it. In this type of work, large vehicles had to be parked on the road during the work, which caused traffic congestion. A bridge inspection device was also proposed in which guide rails were provided on both haunches of the bridge body, a self-propelled or manually driven drive bogie was suspended from the guide rails, and a walkway was passed between both drive bogies. However, this required a walkway to be installed on the bridge body at all times, and since it was impossible to cross the piers, the above-mentioned device had to remain installed between each pier, which was impractical. Therefore, an improved detour type bridge inspection method was developed that shortens the length of the walkway to half the width of the bridge body, and allows the walkway to be rotated or otherwise moved out of the way when passing through the piers. A device was proposed.

This bridge pier detour type bridge inspection device was installed in the 51st
It is already known as shown in 48425 etc.
As mentioned above, in these conventional systems, a walkway approximately half the width of the bridge body is mounted on a drive bogie that can run freely on a guide rail provided on the lower surface of the haunch of the bridge body, and is equipped with horizontal turning, horizontal sliding, or It is installed so that it can rotate vertically. Usually, drive carts are often self-propelled, suspended by suspension means having wheels placed on guide rails, and the wheels rotated by a motor or the like.

Problems to be Solved by the Invention In this conventional bridge inspection device that bypasses piers, one end of the long walkway is attached to a drive bogie, and since this drive bogie is only suspended and supported by a guide rail by a suspension means, it is cantilevered. Be supportive. Therefore,
When a worker stood on the end of the walkway, it would sag by several tens of centimeters, making it unstable and dangerous. Therefore, inspection work around the center of the lower part of the bridge body was difficult. Furthermore, since the above-mentioned bridge inspection device is installed symmetrically on both sides of the bridge body and has to be worked on each half separately, work efficiency tends to decrease.

The purpose of this invention is to prevent the above-mentioned shortcomings of conventional bridge inspection devices. Specifically, the purpose of this invention is to develop a bridge inspection device that bypasses piers and can safely work across the entire width of the bridge body at the same time. The purpose is to provide

[Structure of the invention] Means for solving the problem The present invention suspends and supports a drive bogie by suspension means so that it can run freely on a guide rail provided on the lower surface of the haunch part of the bridge body, and a walkway is provided at the bottom of the drive bogie. Installed so as to be retracted from the piers when passing through the piers, they are placed symmetrically on both haunches of the bridge body so that the tips of the walkways approach each other, and the walkways are formed between the tips of both walkways. The present invention is characterized in that it is provided with a spanning board that spans the gap between the walkways, and that at least one of the walkways is provided with a synchronizing means for synchronizing the running of the drive bogie with the running of the other drive bogie.

The suspension means has wheels placed on guide rails at the front and back in the traveling direction, as in the conventional example, but it is desirable that at least one of the wheels is movable up and down.

Furthermore, the simplest method for synchronization is to change the running speed of the drive carriage when the traveling speeds of both suspended carriages deviate within a certain range. To detect the deviation, a gangplank is attached to one walkway with a hinge, a limit switch is provided on the other walkway, and the limit switch is turned on when the positional deviation of both walkways reaches a predetermined amount on the bottom surface of the gangplank. Set up a striker.

Function: If a gangplank is installed at the end of the walkway, the overall system will be similar to a bridge inspection device for the width of the bridge body, allowing workers to work simultaneously across the entire width of the bridge body. Furthermore, if the gangplank is removed, each walkway can be rotated by its own drive truck to cross the pier, allowing a single device to work over a wide range of areas.

Even if a gangplank is passed between the walkways as described above, if the moving speeds of both drive carts are different, the gangplank will come off, but by providing a synchronization means, both can be synchronized and moved in parallel. The gap between the tips of both walkways can be closed without the gangplank coming off while both walkways are moving.

Since the walkway is supported on a cantilever, considerable force is applied to the suspension means, so the wheels attached to the guide rail of this type of inspection device are usually attached at regular intervals in the front and back of the traveling direction. The bridge body has many parts that are gentle curves in the vertical direction rather than straight parts. Naturally, the guide rail is often inclined along it. Therefore, if the height of the wheels of the suspension means is constant, the height of the front and rear wheels will change depending on the inclination of the guide rail, and the walkway will incline accordingly.However, as in the present invention, at least one wheel If it can be raised and lowered, its height can be changed according to the inclination of the guide rail, and the walkway can be kept level.

Embodiment Figure 1 shows an example of an inspection device 2 of the present invention installed on a bridge body 1.
Two guide rails 4 are attached to the lower surface of the corbels 3 on both sides of the bridge body 1, and a walkway 5 for workers to ride on these guide rails is installed horizontally at the bottom. A drive trolley 6, which is rotatably mounted, is suspended and supported by suspension means 7 so as to be freely movable. Note that in this specification, the driving truck 6 is a general term for a portion that connects the suspension means 7 and the walkway 5. As a means for rotatably attaching the walkway 5, any conventionally known means may be used, and the specific structure thereof will be omitted in this specification. This turning is to prevent the walkway from hitting the pier when passing the pier 8. In this embodiment, the walkway 5 is turned horizontally as described above, but as shown in FIG. The walkway may slide horizontally, or it may pivot vertically as shown in FIG.

As described above, the inspection apparatus 2 of this embodiment has the same configuration, except that the structure of the tip end of the walkway 5 is slightly different, as will be described later, and is arranged symmetrically. The respective walkways 5, 5 are attached to the guide rails 4, 4 via driving carts 6, 6 and suspension means 7, with their respective tips approached. This hallway 5,5
A gangplank 9 is provided at the tip of the walkway so as to straddle the gap 11 between both walkways. A plan view of the gangplank 9 is shown in FIG. 4, and the gangplank 9 is made of a single rectangular iron plate, etc., and hinges 10 provided at both ends of one piece 9a allow it to be attached to one of the walkways 5A as shown in FIG. It is rotatably mounted. At the tip of the walkway 5B on which the gangplank 9 is placed, protrusions 5c are formed on the left and right sides so that the gangboard 9 will not protrude from the walkway 5B even if the positional relationship between both walkways deviates. As shown, the width of the gangplank 9 is the same as that of the other walkway 5.
B, and is designed to straddle the gap 11 created between both walkways. A presser 13 is provided at the tip of the other walkway 5B to press down the end of the gangplank 9 that has been passed, so that the spanner board 9 that has been passed can be held down. This holding tool 13 is rotated around a pin 14, and is rotated and held after passing the connecting plate 9. As shown in FIG. 5, lowered steps 15 and 16 are formed at the end of each walkway where the gangplank 9 is passed, so that the surface of the gangplank 9 and the surfaces of both walkways are aligned. has been done. These stepped portions do not necessarily have to be formed. In this embodiment, since a stepped portion is formed, a stopper 18 is provided on the back surface of the spanning plate 9 for positioning the spanning plate 9.

A recess 19 of a constant width is formed in the center of the step 16 of the walkway 5B, and as shown in enlarged views in FIGS. 6 and 7, limit switches 20 are installed at both ends of the recess 19, and This depression 1 is on the back side of 9.
A striker 21 for turning on both limit switches 20 is provided at the center of the switch 9. This striker 21 is provided at a position that is in the center between both limit switches when both walkways coincide with each other on the back side of the spanning board 9. These limit switches and strikers are used to move both drive carriages 6, 6 in synchronization. In this embodiment, motors M for rotating wheels 25 by suspension means, which will be described later, run at a predetermined constant speed on both the left and right sides when no limit switch is turned on. Now, assuming that the walkway 5 is moving in the direction of the arrow on the drawings of Figures 4 and 7,
If the speed of one of the corridors 5B becomes slow for some reason, the corridor 5A will take the lead and the positions of both corridors will shift. When the deviation reaches a predetermined amount, the striker 21 switches the limit switch 2 on the upper side of the diagram.
Turn on 0A (Figure 7). The motor M on the walkway 5B side where the limit switch is installed is
For example, an inverter type limit switch 20
It is wired so that it rotates at a faster speed when A is turned on, and the other limit switch 20B
wired to rotate at a slow speed when turned on. Therefore, when the limit switch 20A is turned on, the corridor 5B moves quickly. Conversely, if the corridor 5B moves faster for some reason, the limit switch 20B is turned on by the striker 21 and the moving speed of the corridor 5B becomes slower. That is, in this embodiment, the limit switch 20, the striker 21, and the motor M for operating the wheels of the suspension means constitute a tuning means, and the tuning means is tuned so that the positional deviation of both walkways is within a certain range. while driving. Of course, it is also possible to use optical sensors, CPUs, etc. for detailed control to minimize the deviation, but this becomes complicated and expensive.

FIG. 8 shows the relationship between the drive truck 6 and the suspension means 7, and the drive truck 6 is composed of a rotating section 23 and a platform section 24. The platform 24 is designed so that a person inspecting the corbel can stand on it. The guide rail 4 is made of H-shaped steel, and has wheels 25,
26 is placed on its lower horizontal portion to support the whole, and can be moved as a whole by rotation. The suspension means 7 has a drive section 27 having the above-mentioned wheels, and this is attached to the base section 24 by a cylinder 28 which is extendable and retractable by hydraulic pressure or the like. Therefore, the suspension means 7 can be raised and lowered with respect to the drive carriage 6. In this embodiment, both the front and rear suspension means are movable up and down, but only one may be movable up and down, and the other may be fixed at a constant height. When the guide rail 4 is inclined as shown in the figure, the platform 24 and the walkway 5 can be kept level by changing the height from the platform 24 to the wheels 25, 26.

When working with this embodiment of the device, get onto the walkway 5, cross the gangplank 9, and use the presser 13.
When the gangplank 9 is pressed down, both walkways 5, 5 become one, and it becomes an inspection device that spans the entire width of the bridge body 1, so workers can walk along both walkways to perform inspections and other work. be able to. As mentioned above, the walkway 5 is supported on a cantilever, so if you step on the end of the walkway, the end will bend, but since the gangplank 9 is held down by the holding tool 13 and connected to the other walkway, the amount of bending will be relatively small. , easy to work with.

After the work at the initial position is completed, the motors M connected to the wheels 25 via reduction gears are connected to the operation panels (not shown) installed on the bases of both drive carts 6 and including an inverter-type frequency conversion circuit. By operating the device and rotating the wheels, the device of this embodiment can be moved. At that time, if the moving speed changes for some reason and one moves first, the adjustment by the limit switch 20 and striker 21 is as described above. Therefore, the present inspection device 2 moves in synchronization as a whole. As described above, when the walkway is dangerous due to the vertical inclination of the bridge body 1, the height of one or both of the suspension means 7 is adjusted to maintain the level. Move the drive cart, stop at a new work location, and perform the work in the same way. Repeat the same below.

When moving this device, when it comes to the pier 8, remove the gangplank 9, turn the walkway 5 horizontally using the operation panel of each drive bogie to a position where the walkway does not touch the pier, and continue moving the drive bogie 6. continue,
The driving truck is stopped at a position where the tip of each walkway leaves the pier 8, and the walkway 5 is rotated again to bring both tips together. If the position is off,
One of the driving carts 6 is moved to bring them into alignment, and the work is carried out by passing the connecting plate 9 and holding it down with the presser 13 in the same manner as described above.

[Effects of the invention] As described above, the invention has a structure in which a gangplank is passed between both walkways, so inspections and other work can be carried out on the entire width of the bridge body at the same time, improving work efficiency. be able to. Furthermore, since the leading ends of both walkways are connected by a gangplank, the bending of the leading ends of the walkways is reduced, making work safer.

In addition, the present invention has a structure in which the walkway can be rotated or slid to avoid piers on the drive carriage, so by removing the gangplank, it can be easily moved between the next piers, and the walkway can be moved continuously with one device. This makes it possible to continue working, further improving work efficiency.

Furthermore, the present invention uses a limit switch and a striker to detect a shift in the positions of both walkways, and the synchronization means automatically corrects the shift. There is no risk of it coming off, and safety can be maintained.

Since the present invention has a structure that is suspended from the underside of a bridge, it can be made relatively small even if it spans the entire width of the bridge, does not put extra weight on the bridge, and can be used even on existing bridges. can be installed.

[Brief explanation of the drawing]

Figure 1 is a front view of one embodiment of the present invention attached to a bridge body, Figures 2 and 3 are front views of different embodiments attached to a bridge body, and Figure 4 is a front view of both of them. Figure 5 is a plan view of the tip of the walkway, Figure 5 is a sectional view of that part, Figure 6 is an enlarged view of the central part of Figure 5, Figure 7 is a plan view of the recess, Figure 8 is a diagram of Figure 1. FIG. 3 is a side view of the embodiment. DESCRIPTION OF SYMBOLS 1...Bridge body, 2...Inspection device, 3...Haunch part, 4...Guide rail, 5...Walkway, 6...Drive truck, 7...Suspension means, 9...Gangboard, 10...
...hinge, 13...presser, 20...micro switch, 21...striker.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A drive bogie is suspended and supported by suspension means so that it can run freely on a guide rail provided on the lower surface of the haunch of the bridge body, and a walkway is provided at the bottom of the drive bogie so that it is retracted from the pier when passing through the pier. These are installed on both sides of the bridge body in a symmetrical manner so that the ends of the walkways are close to each other during work, and a gangplank that spans the ends of both walkways is attached to one walkway using hinges. A limit switch is provided on the other walkway, and a striker is provided on the lower surface of the gangway board that turns on the limit switch when the positional deviation of both walkways is a predetermined amount. A pier bypass type bridge inspection device characterized in that one of the drive bogies is provided with a synchronizing means for synchronizing the running of the drive bogie with the running of the other drive bogie. (2) The bridge pier bypass type bridge inspection device according to claim 1, wherein the suspension means has wheels placed on guide rails in the front and back of the traveling direction, and at least one of the wheels is movable up and down.