JPH0242727Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a hanger rope saddle hanging device on a long suspension bridge.

In a long suspension bridge, as illustrated in Figs. 1 to 3, cable bands 2 are fixed to the outer periphery of the main cable 1 at multiple points, and hanger ropes for hanging the stiffening girder are attached to the bands 2. 3
are suspended and connected to the stiffening girder 4 at their respective lower ends.

A general cable band 2 has a structure in which the parts are joined together and joined to the cable 1 by tightening with bolts 5. In this case, the zenith is set at the center of the upper part of the cable band 2. The rope 3 is made into a saddle shape by matching the mark (for zenith alignment) placed in advance at the longitudinal midpoint of the hanger rope 3 with the point as a reference.
It is configured to connect both lower ends to the stiffening girder side.

However, at the time when the hanger rope 3 is attached to the saddle, the main cable 1 is affected by sunlight, and its zenith part has the property of repeating a natural rotation phenomenon within an angular range of several degrees during the day and night. For example, even if the hanger rope is saddled by aligning the zenith alignment mark pre-applied at the longitudinal midpoint of the hanger rope 3 with the zenith set at the center above the cable band 2, the above-mentioned problem will not occur. During the day when the main cable 1 is affected by sunlight, the main cable 1 is in a rotated position, and the cable band 2 and the hanger rope 3 saddled to it respond accordingly, so during the important rope connection work, the hanger rope Both lower end socket portions 11, 11 of No. 3 are not at the same height, and there is a difference in height between the top and bottom due to the rotation of the cable.

In this case, in order to connect the rope to the stiffening girder 4, the lower ends of both ropes must be at the same level, but in the conventional structure, only the rope 3 was configured to be able to slip separately from the cable band 2. If the rope 3 is connected to the stiffening girder 4 and fixed completely, the cable band 2 side will remain in a rotationally misaligned state. remains twisted together with the cable 1 whose rotational return is restricted.

If the cable band 2... is tilted in this way, not only will the aesthetic appearance of the installation itself be spoiled, but the hand rope support 6, which is erected and whose base end is fixed to the band 2, will also be in a similar tilted position. The posture greatly deteriorates the aesthetic appearance of a suspension bridge, and furthermore, when the support columns 6 fall, the hand ropes 3 are also displaced, which impairs the safety and efficiency of walking along the hand ropes 3 and the running of cable inspection vehicles, causing problems in the future. There was a risk that maintenance would be hindered.

Furthermore, as mentioned above, since the cable band 2 and the hanger rope 3 have a structure that allows them to slide relative to each other,
There was a risk of slippage occurring during the erection of the stiffening girder, and special consideration was required to prevent slipping.At the same time, when aligning band 2 with cable 1 at the zenith, it was necessary to It is necessary to visually align the zenith of the hanger rope 3 with a certain zenith, which complicates the construction and is one of the factors that prevents shortening of the process.

This idea was devised in view of these circumstances, and its purpose is to effectively solve the above-mentioned aesthetic problems, maintenance problems, as well as problems with slip prevention management and zenith alignment work. The purpose of the present invention is to provide a hanger rope saddle hanging device for a long suspension bridge that can be used in a long suspension bridge, and the feature here is that a cable band having a hanger rope receiving groove on the outer periphery is fixed to the main cable, and a saddle hanging device is provided in the hanger rope receiving groove. The lower ends of a hanger rope suspended in a shape are connected and fixed to the side to be lifted, and the locked part is placed in a specific part of the receiving groove of the cable band so that the longitudinal midpoint of the hanger rope corresponds to the top of the cable band. A lock piece is fixed to the hanger rope, and is engaged with the locked portion to position the hanger rope in the longitudinal direction.

The contents of this invention will be explained below with reference to illustrated embodiments.

FIG. 4 is an exploded perspective view that most accurately illustrates this embodiment, and FIGS. 5 to 7 particularly illustrate the structure of the cable band 2, and FIGS.
Figure 0 shows the relationship when actually saddled.

That is, the locked parts 8, 8 are formed at locations corresponding to the zeniths of the two hanger rope receiving grooves 7, 7 formed in the cable band 2, and are opposed in the circumferential direction via the mating surfaces, while the hanger rope A cylindrical lock piece 9 is immovably fixed to the midpoint of the length of the lock piece 3 by casting or crimping means, and the piece 9 is fitted into the locked portion 8 and then saddled. It's on.

In this case, U-shaped position adjustment plates 10, 10 having a desired thickness are interposed before and after the lock piece 9, and this is because the alignment gaps of each cable band 2 vary due to manufacturing or installation errors. This is to correct and absorb the relationship, and to ensure compatibility between the locked part 8 and the lock piece 9.

There are two types of lock piece 9: one that is fixed integrally, and the other that is detachable using a small bolt. Further, in the above example, the lock piece 9 was provided at the midpoint of the rope, but it is free to provide it at two locations symmetrical to the midpoint, or at a specific location other than the midpoint. Any device that can automatically match the zenith of the cable band 2 and maintain that position may be used.

Further, in the above-mentioned embodiment, the locked portion 8 is formed into a groove shape, and the lock piece 9 is fitted into the groove-shaped portion.
A groove may be formed in the groove, and the locked portion 8 may fit into this groove. Further, the lock piece 9 is fixed in advance at the factory to ensure accurate positioning, but it goes without saying that the present invention is not limited thereto. Furthermore, for work purposes, it is also possible to remove the lock piece 9 using the small bolt type mentioned above after the stiffening girder is erected and there is no longer any concern about relative positional deviation between the cable band 2 and the hanger rope 3.

Therefore, when the hanger rope 3 is fitted with the lock piece 9 to the locked part 8 of the cable band 2 joined to the main cable 1, the middle point of the rope automatically moves to the top of the cable band 2. This not only makes it easier and more reliable to perform the zenith alignment work, which was conventionally done by visual inspection, but also allows the hanger rope 3 to be aligned with the apex when constructing the stiffening girder.
The prevention of slips is simultaneously achieved by the lock piece 9, and there is no longer a need for special anti-slip management.

In addition, when constructing the stiffening girder, the rope 3 does not cause any relative positional shift as described above, so even if the rope 3 rotates with the band 2 and the lower end level is different, it can be forcibly connected and fixed to the stiffening girder side. Once this is done, the cable band 2 can be returned and fixed in the rotated state, and the hand rope support 6 can be provided in its normal position perpendicular to the cable band 2 in its normal position, making it easy to walk or run the inspection vehicle. Maintenance work can be carried out safely and efficiently.

As described above, this invention not only makes it easier and more reliable to align the hanger rope to the zenith, but also eliminates the inconvenience of the rope slipping in the middle, and also allows the cable band and hand rope support to return to their normal positions. As a result, we have made a commitment to make maintenance work more efficient and safe.

[Brief explanation of the drawing]

Fig. 1 is a side view of the main part showing a conventional example, Fig. 2 is a sectional view thereof, Fig. 3 is a plan view of the cable band, Fig. 4 is an exploded perspective view of the main part showing an example of this invention, and Fig. 5 The figure is a plan view of the cable band, No. 6
The figure is a sectional view taken along the line A-A in Fig. 5, and Fig. 7 is a cross-sectional view taken along the line A-A in Fig. 5.
FIG. 8 is a side view when the saddle is mounted, FIG. 9 is a side sectional view of a main part thereof, and FIG. 10 is a cross sectional view thereof. 1... Main cable, 2... Cable band, 3... Hanger rope, 4... Stiffening girder (suspended side), 9... Lock piece.

Claims (1)

[Scope of Claim for Utility Model Registration] A cable band having a hanger rope receiving groove on the outer periphery is fixed to the main cable, and both lower ends of the hanger rope suspended in the hanger rope receiving groove in a saddle shape are connected to the suspended side. In the case of a fixed cable, a locked part is formed in a specific part of the receiving groove of the cable band so that the longitudinal midpoint of the hanger rope corresponds to the top of the cable band, and the locked part is engaged with the hanger rope in the longitudinal direction. A cable band twist correction device using a hanger rope on a long suspension bridge, characterized in that a lock piece for positioning the cable is fixed to the hanger rope.