JPH0660481B2 - Self-propelled lapping method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a cable constructed by bundling a large number of wires in a cable installation for a large suspension bridge, in which a wire is wrapped around the entire length for rust prevention and other purposes. It relates to the traveling wrapping method.

[Prior Art] In a large suspension bridge, as shown in FIG. 10, a large number of cable bands i are attached at predetermined intervals to a cable a laid via main towers j and k, and each cable band i is attached to each cable band i. A hanger cable having a length corresponding to the inclination of the cable a is hung and hung down, the stiffening truss m is supported on the hanger cable, and the whole cable is hung by the cable a.

For the purpose of rust prevention and the like, the above cable a has conventionally been wrapped by wrapping a wire around the surface without any gap.

The conventional lapping machine used in the lapping method is
As shown in the outline of an example in FIG. 11, a wrapping machine main body c rotatably supported on a frame b supported by the cable a so as to be movable along the cable a so as to rotate in contact with the outer surface of the cable a. The wire reel e, on which the wrapping wire d is wound, is attached to the wrapping machine main body c, and the wrapping wire d is wound around the cable a and unwound from the wire reel e.
Is equipped with a tension device (not shown) for applying a tension to the wrapping machine body c so that the wrapping wire d can be wound around the outer periphery of the cable a with a constant tension. A wire rope g from a movable traveling winch f is bound to the frame b, and the lapping machine main body c is rotated by a motor h installed on the frame b while pulling the entire lapping machine through the wire rope g. The wrapping wire d can be sequentially wound in the longitudinal direction of the cable a.

However, in the middle of the cable a, a cable band i for stopping the hanger cable for suspending the bridge is attached at a predetermined interval, while the wrapping machine body c
Since the inner diameter of the cable is substantially equal to the outer diameter of the cable a so that it can be guided and rotated by the cable a,
Even when moving along the cable a while winding the wrapping wire d around the outer periphery of the cable a, the portion of the cable band i cannot pass while rotating.
Moreover, in the conventional lapping machine, the tensioning device for winding the lapping wire d around the cable with a predetermined tension is integrated with the lapping machine main body c, and the movement of the lapping machine main body c other than rotation is restricted with respect to the frame b. Therefore, in the vicinity of the cable band i, there is a portion where the wrapping wire d cannot be automatically wound around the outer periphery of the cable a.

Therefore, conventionally, in a place where the wrapping wire cannot be automatically wound near the cable band i, the wrapping wire is wound by applying tension to the wrapping wire manually.

[Problems to be Solved by the Invention] However, in the conventional wrapping method using the wrapping machine, since the wrapping machine body c is directly supported by the cable a due to the structure of the wrapping machine, the position of the cable band i is changed. When dismounting and relocating the wrapping machine main body c is required when trying to get over the wrapping machine, and because the component force of the pulling force of the winch f or the wire winding force is used as the forward force of the wrapping machine, it follows the inclination of the cable. Since it cannot be installed in a descending state, and the structure is such that the wrapping wire d is forcibly guided to the cable a at a very short distance, in the wrapping work near the cable band i, the wrapping wire is manually wound around the outer periphery of the cable a. It became work, and the wrapping work became dangerous In addition to safety issues, there was a problem that the wrapping property of the wrapping wire was poor due to insufficient tension due to human power, and the work efficiency was also poor.

Therefore, according to the present invention, the portion of the cable band fixed to the cable and the hanger cable hung on the cable band can be easily passed, and the wrapping work can be automatically performed even in the vicinity of the conventionally wound cable band. And along the slope of the cable,
The purpose is to provide a self-propelled lapping method that allows lapping work while descending.

[Means for Solving the Problems] In order to achieve the above object, the present invention enables a fixed frame that can be supported by the cable and can be moved along the cable to be able to grip the cable. The traveling frame is movably mounted in the longitudinal direction of the cable, and the lapping wire reel is supported by a disk having an inner diameter larger than the outer diameter of the cable band and a part of which is cut out. In the wrapping machine main body rotatably supported by the wrapping machine, a tension device for applying tension to the wrapping wire fed from the wrapping wire reel is incorporated so as to be movable in the axial direction of the wrapping machine main body, Drive device for rotating the machine body and drive for relatively moving the traveling frame and the fixed frame Using a wrapping machine equipped with a device, the fixed frame and the traveling frame are moved forward and alternately in a worm-like manner along the cable, and the wrapping wire is wound around the cable without any gap.

[Operation] In the wrapping work away from the cable band, the fixed frame is fixedly supported by the cable, the traveling frame is moved while rotating the wrapping machine body, and the wrapping wire fed from the wrapping wire reel is removed from the cable. Wrap it around. When the traveling frame reaches the end of the moving stroke, the traveling frame is fixed to the cable and at the same time the stationary frame is separated from the cable to move the stationary frame with respect to the traveling frame, and thereafter, the traveling frame and the stationary frame are moved like a scale. By wrapping the wrapping wire around the outer circumference of the cable while doing so, it is possible to perform reliable wrapping on the cable while self-propelled. Even if the wrapping machine body comes to the position of the cable band, the wrapping work can be performed while moving the tension device in the wrapping machine body in the cable band direction of the wrapping machine body. or,
Since the body of the wrapping machine has an inner diameter that is larger than the outer diameter of the cable band, it can pass through the cable band as it is.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a state in which the construction method of the present invention is being carried out. The lapping machine used in the present invention has a fixed frame I supported by the cable 1 by receiving a reaction force to the cable 1 and an example of the cable 1 as shown in FIGS. 1 to 6.
A traveling frame II supported by the cable 1 by receiving a reaction force on the stationary frame I and movably supported on the fixed frame I.
And a wrapping machine body III rotatably supported by the traveling frame II, and a tension device capable of moving in the wrapping machine body III by operating the clutch 2 from the rotational force of the wrapping machine body III. IV
Composed of and.

More specifically, the fixed frame I is, as shown in FIG. 1 and FIG. 2, a gate-shaped frame 3, 4 that straddles the cable 1.
A support frame 6 with a built-in hydraulic jack 5 that moves toward and away from the axis of the cable 1 is fixed to each of the gate-shaped frames 3 and 4, and the tip of the hydraulic jack 5 in each support frame 6 is fixed. Support the shoe 7 that can be pressed along the outer surface of the cable 1
By pressing the lever 7 at the point against the cable 1 with the hydraulic jack 5, a reaction force is applied to the cable 1 to cause the cable 1 to move.
The front and rear gate-shaped frames 3 and 4 are fixed to a horizontal bar 8 made of H-shaped steel arranged in parallel to the left and right, and further, on the upper surface of the left and right horizontal bars 8 of a required length. The rack 9 is attached. 10 is a reinforcing material that connects the left and right horizontal bars 8 to each other, and is removable.

As shown in FIGS. 1, 3, and 4, the traveling frame II supported by the fixed frame I is a double-gate type in which gate-shaped frames 11 and 12 straddling the cable 1 are arranged in front and rear. The frames 11 and 12 are integrally structured by the upper and lower horizontal rails 13 and 14 extending in the front-rear direction, and the left and right horizontal bars 8 of the fixed frame I can be used as rails at the lower ends of the gate-shaped frames 11 and 12. Each of the wheels 15 is attached to the lower cross rail 14 and the pinion 16 that engages with the rack 9 of the fixed frame I is attached to the lower cross rail 14.
And a drive device 17 for rotating the pinion 16 is attached to a frame 13 'constructed on the upper horizontal rail 13, and the drive frame 17 rotates the pinion 16 so that the traveling frame II is opposed to the fixed frame I in the front-rear direction. It can be moved. As shown in FIG. 4, the driving mechanism of the pinion 16 has a sprocket wheel 20 and 20 'mounted on a long shaft 18 supported by a frame 13' mounted on an upper horizontal rail, and constitutes a fixed frame I on the other hand. The sprocket wheels 16 'are fixed to the pinion shafts 18' of the pinions 16 so as to mesh with the racks 9 on the left and right horizontal bars 8, and a brake with a built-in cyclo reducer is mounted on the frame 13 'erected on the upper horizontal rail 13. A sprocket wheel in which a drive unit 17 including a motor is installed and is attached to an output shaft of the drive unit 17.
19 and a sprocket wheel 20 attached to the above long shaft 18
Endless chain 21 is attached to and, and further chain 21 'is attached to sprocket wheel 20' attached to both ends of long shaft 18 and sprocket wheel 16 'attached to pinion shaft 18'.
Hang on. Sprocket wheel 19,2 by drive unit 17
The left and right pinions 16 can be simultaneously rotated via 0, the chain 21, the sprocket wheels 20 'and 16', the chain 21 ', and the pinion shaft 18'. The front and rear gate-shaped frames 11 and 12 are also hydraulic devices having a sinker 22 attached to the tip thereof as a device for applying a reaction force to the cable 1 similarly to the front-and-rear gate-shaped frames 3 and 4 of the fixed frame I described above. As shown in FIG. 3, a support frame 24 with a built-in jack 23 is attached at three positions toward the axis of the cable 1, and each hydraulic jack is attached to a cable band 26 fixed at a predetermined interval in the longitudinal direction of the cable 1. By retracting 23, each shoe 22 can be retracted to a position where it does not interfere with the cable band 26. A device for applying a reaction force to the cable 1 in each of the gate-shaped frames 3 and 4 of the fixed frame I has the same structure. Numeral 25 is a reinforcing material which is detachable.

Further, as shown in FIGS. 1 and 5, the lapping machine main body III supported by the traveling frame II has discs 27 each having an inner diameter larger than the outer diameter of the cable band 26 at a plurality of positions on the traveling frame II. A drive device 30 which is supported by a guide roller 28 fixed to the disk 1 to allow the cable 1 to freely rotate around the cable 1, and a ring gear 29 having a large inner diameter fixed to one side of the disk 27 to be installed on the traveling frame II.
The gear 31 attached to the output shaft of the
The disk 27 can be rotated by means of the gear 31 and the ring gear 29 by means of the gear 31, and the wrapping wire reel 32 around which the wrapping wire 33 is wound is attached to the disk 27 at an appropriate number (two in the drawing). Together with the tension device IV
Is attached so as to be movable in the front-rear direction as described later.

The tension device IV described above applies tension to the wrapping wire 33 that is unwound from the wrapping wire reel 32 and wound around the cable 1. As shown in FIGS. 1, 5, and 6, a plurality of tension devices IV are provided. The slider 35 with the pulley 34 attached to it is the disk 2 that constitutes the lapping machine body III.
7 are arranged at two locations corresponding to the wrapping wire reel 32, and both ends of each slider 35 are screwed onto two horizontal screw shafts 36 and 37 which are respectively supported by the disk 27 so as to penetrate therethrough.
A sprocket wheel 38 is attached to one end of each one screw shaft 36 as shown in FIG. 6, and sprocket wheels 39 and 40 are attached to the other ends of the above two screw shafts 36 and 37, respectively. Put an endless chain 41 on 39, 40.

In addition, on the side of the disk 27, the clutch 2 is operated in which the pinion gear 43 is slid to be switched by operating the clutch lever 42.
And a shaft 45 having a gear 44 at the end, a reduction gear 46 meshing with the gear 44, and a shaft 48 to which a sprocket wheel 47 is fixed are supported by a box 49, and there is no end between the sprocket wheels 47 and 38. The chain 50 is hung, and the pinion gear 43 is engaged with the ring gear 51 having a large inner diameter fixed to the traveling frame II by the operation of the clutch 2, and the lapping machine main body III is rotated with the pinion gear 43 engaged with the ring gear 51. By doing so, the pinion gear 43 rotates along the ring gear 51, and the shaft 45, the gears 44 and 46, the shaft 48, the sprocket wheel 47, the chain 50,
Rotational power is transmitted to the screw shaft 36 via the sprocket wheel 38, and the rotation of the screw shafts 36 and 37 causes the slider 3 to move.
5 is moved in the front-back direction (axial direction of the cable) so that the tension device IV can move in the lapping machine body III.

52 is a disk 27 and a ring gear so that the hanger cable 53 for suspending the bridge can be passed over the cable band 26.
It is an opening / closing part provided at each predetermined location of 29, 51.

When performing the wrapping work at a position away from the cable band 26, at the front and rear end portions of the fixed frame I, the hydraulic jacks 5 push out the shoe 7 to press it against the outer surface of the cable 1.
The cable 1 receives a reaction force to support the fixed frame I. On the other hand, in the lapping machine main body III, the clutch 2 is disengaged and the pinion gear 43 is moved to the ring gear 51 on the traveling frame II side.
Keep it removed from the. After unwinding the wrapping wire 33 from the reel 32 in this state, the tension device IV pulley
It is wound around 34 around the outer circumference of the cable 1, and then the driving device 30 rotates the lapping machine body III at a constant speed, while another driving device 17 rotates the pinion 16 to rotate the lapping machine body III. Synchronize. As a result, the wrapping wire 33 is continuously wound around the outer circumference of the cable 1 by the rotation of the wrapping machine main body III and the forward movement of the traveling frame II. In FIG. 1, the portion L is the portion where the lapping work has been completed.

As described above, the traveling frame II moves on the fixed frame I along the cable 1 together with the lapping machine main body III, and when the traveling frame II reaches the front end of the fixed frame I, a reaction force is exerted on the cable 1 of the traveling frame II. After pushing out the shoe 22 with the hydraulic jack 23 in the device and pressing it against the outer surface of the cable 1, the pressing force of the hydraulic jack 5 in the device that applies a reaction force to the cable 1 of the fixed frame I is weakened,
The drive device 17 rotates the pinion 16. As a result, the fixed frame I is moved forward with respect to the traveling frame II.

By repeating this operation alternately, the lapping work is continued by rotating the lapping thin body III while advancing the fixed frame I and the traveling frame II in a scale-like manner.

In the above-mentioned operation, when the front end side of the fixed frame I approaches the position of the cable band 26 and passes through the cable band 26, the hydraulic jacks 5 retract the respective gears 7 so as not to interfere with the cable band 26. With
By removing the reinforcing material 10, it is possible to easily pass through the cable band 26 and the hanger cable 53.
Also, when the front end of the traveling frame II comes to the position of the cable band 26, the hydraulic jack 23 is used to retreat the shoe 22 and remove the reinforcing member 25 so as to pass through the cable band 26 and the hanger cable 53. You can

Next, when the wrapping machine body III comes to the position of the cable band 26, the tension device IV is moved to the wrapping machine body II.
If it is fixed to I, it is possible to pass the cable band 26 and the hanger cable 53 while rotating the wrapping machine body III by rotating the ring gear 29, the disk 27 and the hanger.
Since the interference with the cable 53 is impossible, the wrapping work in the vicinity of the cable band 26 is performed as follows. That is, the drive device 17 is stopped, the clutch 2 is operated, and the pinion gear 43 is moved to the ring gear 51 on the traveling frame II side.
And the pinion gear 43 is rotated by the rotational force of the lapping machine body III. When the pinion gear 43 rotates, rotational power is transmitted to one of the two screw shafts arranged in parallel as shown in FIG. 6, and the one screw shaft 36 transmits the rotational power to the other screw shaft 37.
Rotational power is transmitted to the screw shafts 39, 40 and the chain 41, and both screw shafts 36, 37 start rotating at the same time. As a result, the slider 35 of the tension device IV screwed onto the screw shafts 36, 37 can be moved along the screw shafts 36, 37 from the solid line position in FIG. 6 to the position shown by the two-dot chain line at the right end. This tension device IV moves inside the wrapping machine body III to move the winding position of the wrapping wire 33 around the cable 1 and automatically wrap around the cable band 26 even when the traveling frame II is stopped. can do.

When the lapping machine body III passes through the portion of the cable band 26, the rotation of the lapping machine body III is stopped, the opening / closing portion 52 of the ring gear 29 and the opening / closing portion 52 of the disc 27 are opened, and then the traveling frame II is opened. The cable band 26 and the hanger cable 53 are made to pass therethrough. When the rear end of the traveling frame II passes through the cable band 26 and the hanger cable 53, the opening / closing part of the ring gear 51 is opened, and the reinforcing member 25 is removed so as not to interfere with the hanger cable 53. Let

When the traveling frame II has finished passing through the cable band 26 and the hanger cable 53 in this way, the tension device IV is returned to the original position and the lapping work is performed again from the end of the cable band 26. By advancing the work in this manner, the wrapping can be performed over the entire length of the cable 1 while climbing and descending along the inclination of the cable 1 and overcoming obstacles.

Incidentally, the lapping machine used in the lapping method of the present invention is not limited to the one in the above embodiment,
For example, a tensioning device IV that applies a predetermined tension to the wrapping wire 33 that is unwound from the wrapping wire reel 32 and wound around the cable 1 and that determines the unwinding position of the wrapping wire 33 around the cable 1, that is, the winding position, Lapping machine body by operating clutch 2
Although it is configured to move laterally when III is rotated, it may be configured as follows. That is, as shown in FIG. 7, a plurality of pulleys 34 are attached to a slider 35 whose both ends are screwed onto the screw shafts 36 and 37, and appropriate pulleys can be displaced so that the wrapping wires attached to the respective pulleys 34 can be displaced.
By applying tension to 33 and rotating the screw shafts 36 and 37 with the handle 54, the slider 35 can move in the front-back direction in the lapping machine main body III to change the feeding position of the lapping wire 33. You may do it.

In the case of the embodiment shown in FIG. 7, in the process of performing the lapping work while the fixed frame I and the traveling frame II are alternately moving forward in a worm-like manner, as shown in FIG. The frame 11 passes through the cable band 26 and the wrapping machine body III is connected to the cable band 26.
At the position of, the cable band 26 and the hanger cable are rotated while rotating the wrapping machine body III due to the presence of the hanger cable 53 hung on the cable hand 26.
Since the position 53 cannot be passed, the wrapping work in the vicinity of the cable band 26 is impossible. In this case, however, the wrapping work in the vicinity of the cable band 26 is performed as follows. That is, when the lapping machine body III reaches the lapping limit position x shown in FIG.
The drive devices 17, 30 are stopped, and then the screw shafts 36, 37 are rotated by the operation of the handle 54 shown in FIG. 7 to horizontally move the slider 35 screwed to the screw shafts 36, 37 forward. , The tension device IV is moved in the lapping machine body III from the solid line position in FIG. 7 to the alternate long and two short dashes line position.
At this time, the traveling frame II is attached to the lapping machine body III.
The tensioning device IV is shifted as shown in FIG. 9 so that the tensioning device IV is at the lapping limit position. Then, the lapping machine body III is rotated while advancing the traveling frame II, and the lapping work is continued until the lapping machine body III reaches the position of the cable band 26. This allows the cable band
Lapping work around 26 can be performed mechanically and reliably.

[Advantages of the Invention] As described above, according to the self-propelled lapping method of the present invention, the traveling frame in which the lapping machine main body is rotatably supported is fixed on the fixed frame supported so as to be movable along the cable. The fixed frame and the traveling frame are moved relative to each other so that the fixed frame and the traveling frame can move in a worm-like manner, and the wrapping machine body has an inner diameter larger than that of the cable band. Since the wire is wound around the cable using a wrapping machine that has a notch that can be opened and closed so as to pass through the hanger cable position while moving the tension device inside the main body of the wrapping machine. The following excellent effects can be obtained.

(i) Since the cable band installed on the cable and the hanger cable part can easily pass through, disassembling the machine,
No work required for relocation, improving work safety.

(ii) All the wrapping work on the cable can be carried out by mechanical winding, and especially, at the part of the cable band, the mechanical winding of the wrapping can be surely performed up to the end of the cable band and from the end of the cable band, and the winding tension It becomes possible to carry out stable construction, etc., and it is possible to eliminate the conventional manual winding work, and it is possible to eliminate all problems due to manual winding work.

(iii) Since the wrapping machine runs mechanically without relying on the winding component force, and because it is equipped with its own running device, it is possible to perform both upward wrapping and downward wrapping along the inclination of the cable. It will be easier in construction.

(iv) Concerning the lapping speed, the traveling of the traveling frame and the rotation of the lapping machine body are synchronized, and stable lapping is possible.

(v) The range of applicable cable diameters is extremely wide, and the versatility of the machine is high.

[Brief description of drawings]

1 is an overall side view showing an embodiment of the present invention, FIG. 2 is a partial sectional view taken along the direction A in FIG. 1, and FIG. 3 is B in FIG.
FIG. 4 is a partial sectional view from the B'direction, FIG. 4 is a view showing a traveling drive mechanism of a traveling frame, FIG. 5 is a front view of a lapping machine main body, and FIG. 6 is an enlarged sectional side view showing a moving mechanism portion of a tension device. FIG. 7 is a side view showing a moving mechanism of a tensioning device which is another example of the lapping machine used in the present invention, and FIGS. 8 and 9 show the tensioning device relative to the lapping machine main body shown in FIG. Fig. 10 is a side view of a large suspension bridge, and Fig. 11 is a schematic view of a conventional lapping machine. I ... Fixed frame, II ... Traveling frame, III ... Lapping machine body, IV ... Tension device, 1 ... Cable, 2 ... Clutch, 5 ... Hydraulic jack, 8 ... Horizontal bar, 9 ... Rack, 15 ... wheels, 16 ... pinion, 17
...... Drive device, 18 ′ …… Pinion shaft, 19,20,20 ′ …… Sprocket wheel, 21,21 ′ …… Chain, 23 …… Hydraulic jack, 26 …… Cable band, 27 …… Disc, 29… …
Ring gear, 30 …… Drive device, 32 …… Reel for wrapping wire, 33 …… Wrapping wire, 35 …… Slider,
36,37 …… Screw shaft, 43 …… Pinion gear, 51 ……
Ring gear, 52 …… Opening / closing part, 53 …… Hanger cable.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Ken Takahashi 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Kenji Igaki 3-chome, Takanodai, Suita City, Osaka Prefecture No. 8 (72) Eiji Noguchi, Eiji Noguchi, 3725, Totachimachi, Marugame City, Kagawa Prefecture (72) Inventor, Kazuo Kanasugi 13-13 Fukuzumi, Koto-ku, Tokyo Ishikawajima Iron Works Co., Ltd. (56) References Sho 59-219151 (JP, A) Actually opened Sho 55-71705 (JP, U)

Claims (1)

[Claims] 1. A running frame adapted to be able to grip the cable is movably mounted in a longitudinal direction of the cable on a fixed frame adapted to be supported by the cable and movable along the cable. For the wrapping wire inside the wrapping machine body in which the reel for the wrapping wire is supported by a disk having an inner diameter larger than the outer diameter of the band and a part of which is notched, and which is rotatably supported by the traveling frame. A tension device that applies tension to the wrapping wire delivered from the reel,
The wrapping machine body is installed so as to be movable in the axial direction, and further, a wrapping machine including a drive device for rotating the wrapping machine body and a drive device for relatively moving the traveling frame and the fixed frame is used, and along the cable. A self-propelled lapping method characterized by winding a wrapping wire around a cable with no gaps while moving a fixed frame and a traveling frame alternately forward and backward like a bug.