JP5255516B2 - Method and apparatus for press-fitting anticorrosive agent for wire rope - Google Patents

Description

  The present invention relates to a rust inhibitor press-in method and apparatus for a wire rope for a bridge in which a rust inhibitor is filled in a wire rope.

  Conventionally, as a method of rust-proofing a wire rope, there are a method of brushing manually, or a method of performing using the apparatuses described in Non-Patent Document 1 and Non-Patent Document 2.

  The apparatus described in Non-Patent Document 1 and Non-Patent Document 2 is an apparatus for applying paint to a hanger rope used for a suspension bridge, and is provided with a paint tank for containing paint, and the hanger rope is inserted into the paint tank. A through hole is formed for the purpose.

  The hanger rope is inserted into the through hole, and the hanger rope is painted by moving the paint tank in which the paint is stored along the hanger rope.

Development of automatic painting equipment for Kikuta, Minohama, Matsumura, Nagaohashi hanger rope, research on painting, 110, p56-p59 Nadahama, suspension bridge hanger rope automatic painting example, company) Japan Rust Prevention Technology Association, "Rust Control", May 1985 issue, p2-p6

  In the above-described coating method, the coating tank is moved along the wire rope, so that the wire rope can be coated over a long range, but the upper end is supported by the cable 101 stretched over the suspension bridge 100 shown in FIG. The wire rope portion in the vicinity of the main girder 103 suspended by the lower end portion of the wire rope 102 cannot be processed. That is, as shown in FIG. 11 (a front view seen from the width direction of the suspension bridge 100) and FIG. 12 (a side view seen from the direction orthogonal to FIG. 11), the main girder 103 is composed of two vertically long strips. The horizontal plates 104 and 105 are supported by two vertical pieces 106 and 107 between them, and are provided so that the wire rope 102 penetrates the upper horizontal plate 104 and the lower horizontal plate 105. This is because the upper horizontal plate 104 and the lower horizontal plate 105 obstruct the movement. In addition, since the wire rope 102 near the lower end is attached with a retaining socket 108 and rust is likely to accumulate, a rust inhibitor such as paint or grease has been conventionally applied to the inside of the wire rope. It was desired to be filled.

  The present invention has been made to solve the above-described problems of the prior art, and is intended to prevent a wire rope that can be filled with a rust preventive agent inside the lower end of a wire rope that suspends a main girder of a suspension bridge. An object of the present invention is to provide a rusting agent press-fitting method and apparatus.

  The method of press-fitting a rust inhibitor for a wire rope according to the present invention is to prevent rust by using the socket inside the rust prevention target portion above the socket provided at the lower end of the wire rope that suspends the main girder of the suspension bridge. A method of press-fitting an agent, the mounting step of mounting a peripheral surface packing, which covers the peripheral surface of the wire rope and at least a part of which is opened, to the rust prevention target portion; and the socket A bottom packing disposing step for disposing the bottom packing on the top, and a cover that is formed into a cylindrical shape by abutting the butting surfaces of two half-members having a semicircular cross section; A covering step of covering the peripheral surface packing in a state of placing the cover through the packing and pressing the peripheral surface packing against the rust prevention target portion with the cover; and a lower end portion of the cover Is it above the socket? A pressing and holding step for pressing downward and holding the state, and a state in which the lower end of the cover is pressed against the socket are held in correspondence with the opened portion of the circumferential surface packing. And a press-fitting step of injecting a rust preventive agent into the cover from an injection port provided in the cover and press-fitting the rust preventive into the target portion of the rust preventive treatment.

  According to a second aspect of the present invention, in the method for press-fitting a rust inhibitor for a wire rope according to the first aspect, a lower packing and an upper packing are used as the packing for the peripheral surface, and the lower packing is below the inlet. The lower region of the rust prevention target portion directly above the socket is covered, and the upper packing covers the upper region of the rust prevention target portion above the inlet.

  According to a third aspect of the present invention, in the method of press-fitting a rust inhibitor for a wire rope according to the second aspect, the covering step includes a butt surface packing between the butt surfaces, and a lower end portion of the butt surface packing is the lower side. It is characterized by including arrange | positioning a side packing so that the upper end part of the said abutting surface packing may overlap with the said upper side packing.

  According to a fourth aspect of the present invention, in the wire rope rust preventive press-fitting method according to any one of the first to third aspects, the cover includes a lower end member of the cover separated from each other and a cover on the upper side thereof. And a lower end member of the cover body is slidable with respect to the cover body main body and is fitted in a sealed state therebetween.

  According to a fifth aspect of the present invention, in the wire rope rust preventive press-fitting method according to the fourth aspect of the present invention, the lower end member of the cover is pressed downward by the pressing means against the main body of the cover. .

  The wire rope rust preventive press-fitting device of the present invention uses the socket to rust preventive in the upper portion of the socket provided on the lower end of the wire rope for suspending the main girder of the suspension bridge. An apparatus for press-fitting an agent, which is mounted so as to cover the peripheral surface of the anticorrosion treatment target part, and has a peripheral surface packing having at least a part opened, and two halved members having a semicircular cross section A cover that is made into a cylindrical shape by abutting the butting surfaces, and a cover that covers the state where the circumferential surface packing is pressed against the portion to be rust-prevented, and the two halved members Tightening means that abuts the butting surfaces of each other into a cylindrical shape, a bottom packing provided between the socket and the cover, and a pressing means that presses the lower end of the cover toward the socket from above to below And before A rust preventive agent is injected into the cover from an inlet provided in advance corresponding to the opening portion of the peripheral surface packing of the cover, and the rust preventive is pressed into the rust preventive treatment target portion. And press-fitting means.

  The invention according to claim 7 is the wire rope rust preventive press-fitting device according to claim 6, wherein the peripheral surface packing is a lower packing that covers a lower region of the rust prevention target portion directly above the socket; An upper packing that covers an upper region of the anticorrosion treatment target portion separated from the lower region by an appropriate length, and the lower packing, the upper packing, and the bottom packing are fitted into the wire rope. It is characterized by having.

  The invention of claim 8 is the wire rope rust preventive press-fitting device according to claim 7, wherein the wire rope is twisted into a shape in which a plurality of strands are spirally twisted, and the lower packing, The upper packing and the bottom packing have a spiral groove corresponding to the strand on the inner peripheral surface so as to be in close contact with the peripheral surface of the wire rope.

  The invention according to claim 9 is the wire rope rust preventive press-fitting device according to any one of claims 6 to 8, wherein the cover includes a lower end member of the cover, and a cover main part on the upper side. The cover main part is divided into a plurality in the axial direction, and the plurality of divided parts are stacked along the wire rope.

The invention of claim 10 is the wire rope rust preventive press-fitting device according to claim 7 or 8 , wherein the cover includes a lower end member of the cover and an upper cover main part. The cover main part is divided into a plurality of parts in the axial direction, the plurality of divided parts are stacked along the wire rope, and the cover main part is configured in the axial direction. One of the parts divided into a plurality of parts, wherein an upper part of the lower packing and a lower part of the upper packing are pressed against the rust prevention target part.

  In the case of the method of the present invention, the peripheral surface packing is attached to the portion to be rust-prevented at the lower end of the wire rope, and the bottom packing is disposed on the socket before and after this, and then the above-mentioned on the socket. Put the cover through the bottom packing and cover the peripheral surface packing with the cover so that it presses against the rust prevention target part, and then press the bottom end of the cover against the socket from above to the bottom. Holding the packing in a pressed state, injecting a rust preventive agent into the cover from the injection port provided at a position corresponding to the opening of the circumferential surface packing, and maintaining the state inside the wire rope. A rust inhibitor is press-fitted into the rust prevention target part. Then, a rust preventive agent can be filled inside the rust preventive treatment target part.

  In the case of the invention of claim 2, each packing is shorter and lighter when the circumferential packing divided into the lower packing and the upper packing is used than when the integral circumferential packing is used. Therefore, it is excellent in handleability.

  In the case of the invention of claim 3, the upper end portion of the butting surface packing disposed between the butting surfaces of the cover overlaps with the upper packing, and the lower end portion of the butting surface packing overlaps with the lower packing. The sealed state from the packing to the bottom packing can be improved. However, the upper side of the inlet and the upper packing is not sealed.

  In the case of the invention according to claim 4, when the cover is constituted by the lower end member and the cover main part on the upper side, the cover main part is firmly fixed to the wire rope via the circumferential packing. The lower end member, which is a part of the cover, can be pressed against the socket relatively easily. At this time, the lower end member needs to be slidable with respect to the main body of the cover and needs to be fitted in a sealed state between them, which can be satisfied.

  In the case of the fifth aspect of the invention, the pressing means presses the lower end member downward against the main body of the cover, so that leakage of the rust inhibitor from the bottom packing can be prevented.

  In the case of the device according to the present invention, a packing for the peripheral surface is attached to a portion to be rust-proofed at the lower end of the wire rope, and a bottom packing is disposed on the socket, and the bottom packing is placed on the socket via the bottom packing. Place the cover and cover the circumferential packing against the rust prevention target part with the cover, and keep the bottom packing pressed by pressing the lower end of the cover downward from the top to the socket. Then, the rust preventive agent is injected into the cover from the injection port provided at the position corresponding to the opening portion of the circumferential surface packing while maintaining the state, and the inside of the wire rope is used as the main passage to the rust prevention target portion. Press-fit rust preventive. Then, a rust preventive agent can be filled inside the rust preventive treatment target part.

  According to the seventh aspect of the present invention, the peripheral surface and the bottom surface of the rust prevention target portion can be covered with the lower packing, the upper packing, and the bottom packing without any gaps.

  In the case of the invention according to claim 8, even if the wire rope is twisted into a shape in which a plurality of strands are spirally twisted, the peripheral surface and the bottom surface of the rust prevention target portion are covered with a packing without any gap. be able to.

  In the case of the invention according to claim 9, since the cover is composed of the lower end member and the cover main part divided into a plurality of parts, it is possible to reduce the weight of each component. Even if it is difficult to carry the entire cover at once, it is possible to carry individual parts one by one. When the rust preventive press-fitting is performed, the covers are assembled by stacking the components along the wire rope.

  According to the invention of claim 10, with this configuration, even if the cover main part is divided into a plurality of portions in the axial direction, it is possible to prevent the generation of a gap in which the rust preventive agent leaks.

It is a front view showing a rust preventive press-fitting device for a wire rope according to an embodiment of the present invention. It is a right view of FIG. It is a front sectional view showing a rust preventive press-fitting device. It is a bottom view of the 2nd block. It is sectional drawing of a wire rope. It is a top view of an upper packing and a lower packing. It is a top view of bottom packing. It is a front view which shows the lower end part of a wire rope. (A) is a top view of a bearing plate, (b) is a top view of a lock plate, (c) is a top view of an adjustment plate. It is a front view which shows a suspension bridge. It is a front view which shows a part from the cable of a suspension bridge to the main girder. It is a right view of FIG.

  The present invention will be specifically described below.

  1 is a front view showing a rust preventive press-fitting device for a wire rope according to an embodiment of the present invention, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is a front sectional view showing the rust preventive press-fitting device. is there. The same parts as those in FIGS. 11 and 12 are denoted by the same reference numerals.

  This rust preventive press-fitting device 10 is a device that presses a rust preventive into the rust preventive treatment target portion 5 which is a portion of the wire rope 102 immediately above the socket 108 attached to the lower end portion of the wire rope 102 extending in the vertical direction. is there. In this embodiment, the rust prevention target portion 5 is a region from the lower side of the lower horizontal portion 105 to the upper side of the upper horizontal portion 104 (see FIG. 11).

  As a specific configuration of the rust preventive press-fitting device 10, the peripheral surface packing 12 mounted on the rust prevention target portion 5 and the peripheral surface packing 12 mounted on the socket 108 and the peripheral surface packing 12 are attached to the rust prevention target portion 5. The cover 14 for covering the peripheral surface packing 12 in a state where the cover 14 is pressed, the bottom packing 16 provided between the socket 108 and the cover 14, and the lower end portion 14 a of the cover 14 downward from the top to the socket 108. And a press-in means 22 for injecting a rust-preventing agent into the cover 14 from an injection port 20 provided in advance in the cover 14 and press-fitting the rust-preventive agent into the rust-proofing target portion 5. It comprises.

  The circumferential surface packing 12 includes a lower packing 24 and an upper packing 26 in the present embodiment. The lower packing 24 extends from directly above the socket 108 to the lower side of the injection port 20 and covers the peripheral surface of the lower region of the anticorrosion target 5, while the upper packing 26 is above the injection port 20. And covering the peripheral surface of the upper region of the anticorrosion treatment target portion 5. In addition, as the packing 12 for peripheral surfaces, it is not necessarily required to use the lower packing 24 and the upper packing 26, and an integral one may be used. However, in the case of using the integral peripheral surface packing, it is necessary to use one having at least a portion corresponding to the injection port 20 opened. In addition, the upper packing 26 may use divided packings 26d and 26e that are divided into upper and lower parts at a position above a third block 33 described later (see FIG. 3).

  The cover 14 has a cylindrical shape as a whole, and is divided into four blocks in the axial direction. The first block 31 as a lower end member of the cover 14, the second block 32 thereon, and the second block 32 thereon. The third block 33 on the top and the fourth block 34 on the third block 33 are provided. Here, three from the second block 32 to the fourth block 34 are referred to as a main portion of the cover 14.

  The first block 31 is formed into a cylindrical shape by abutting the butting surfaces 31c of the two half members 31a and 31b, both of which have a semicircular cross section, and tightening with bolts 35 serving as tightening means. The first block 31 is provided with an air vent 31d.

  The second block 32 is formed into a cylindrical shape by abutting the butting surfaces 32c of the two half members 32a and 32b, both of which have a semicircular cross section, and tightening the bolts 35 as a tightening means. A vertically long butting surface packing 36 is disposed between the butting surfaces 32 c of the second block 32.

  The third block 33 is formed into a cylindrical shape by abutting the butting surfaces 33c of the two half members 33a and 33b, both of which have a semicircular cross section, and tightening with bolts 35 serving as tightening means. The fourth block 34 is formed into a cylindrical shape by abutting the butting surfaces 34c of the two half members 34a and 34b, both of which have a semicircular cross section, and tightening with bolts 35 serving as tightening means.

  The first block 31 is placed on the socket 108 via the bottom packing 37. The first block 31 has a guide portion 31 e that protrudes upward in a cylindrical shape on the inner peripheral side (see FIG. 3), and the second block 32 is placed on the first block 31. The second block 32 is formed such that a cylindrical guided portion 32e into which the guide portion 31e enters the inner side protrudes downward (see FIG. 3), and the second block 32 is located inside the guided portion 32e. The guide 31e is put in and placed. That is, the first block 31 as the lower end member of the cover 14 is slidable in the vertical direction with respect to the second block 32 thereon. An O-ring 38 is provided on the outer peripheral surface of the guide portion 31e, and the space between the outer peripheral surface of the guide portion 31e and the inner peripheral surface of the guided portion 32e is held in a sealed state. A third block 33 is placed on the second block 32, and a fourth block 34 is placed on the third block 33.

  The first block 31 presses the lower packing 24 against the peripheral surface of the rust prevention target portion 5 by tightening with the bolt 35. The second block 32 presses the lower packing 24 against the peripheral surface of the rust prevention target portion 5 at the lower end portion 32f, and the upper packing 26 is pressed against the rust prevention target portion 5 at the upper end portion 32g of the second block 32. Press against the peripheral surface. Further, the lower end portion 36 a of the butting surface packing 36 provided on the butting surface 32 c of the second block 32 overlaps the lower packing 24, while the upper end portion 36 b of the butting surface packing 36 overlaps the upper packing 26.

  Both the third block 33 and the fourth block 34 press the upper packing 26 against the peripheral surface of the rust prevention target portion 5 by tightening with the bolts 35. The upper end of the upper packing 26 is substantially the same height as the upper end of the fourth block 34 in the illustrated example, but may be set to a different height.

  As shown in FIG. 4 (bottom view), the second block 32 is provided with a plurality of hydraulic cylinders 40 in the circumferential direction, four in the illustrated example, and the cylinder rods 40a of the hydraulic cylinders 40 are arranged in the vertical direction. It is designed to slide. Further, for example, a hydraulic manual pump 42 is attached to the second block 32, and the hydraulic manual pump 42 and the hydraulic cylinder 40 function as the pressing means 18 for pressing the first block 31 downward, The hydraulic cylinder 40 is driven by the hydraulic manual pump 42, and the first block 31 is pressed downward by the cylinder rod 40a. At this time, the main portions 32 to 34 of the cover body 14 press the lower packing 24 and the upper packing 26 against the peripheral surface of the rust prevention target portion 5 by tightening with the bolts 35, so that the hydraulic cylinder 40 is driven. Thus, the first block 31 can be pressed downward. With this downward pressing, the bottom packing 37 is pressed against the socket 108 by the first block 31, and the bottom packing 37 is sealed.

  The injection port 20 is provided at a position below the central portion in the height direction of the cover body 14, and is provided in the second block 32 in the illustrated example. For example, an electric pump 44 is connected to the injection port 20 as press-fitting means 22 for press-fitting a rust preventive into the rust preventive treatment target portion 5. By the operation of the electric pump 44 (22), the rust inhibitor is formed from the inlet 20 to the inside of the cover body 14 and inside the lower packing 24 and the upper packing 26, that is, the inside of the rust prevention target portion 5 as a main passage. The rust preventive agent is filled into the rust preventive treatment target portion 5 which is the lower end portion of the wire rope 102.

  As the rust preventive agent, for example, grease, a rust inhibitor, or a paint is used.

  As shown in FIG. 5 (cross-sectional view), the wire rope 102 is obtained by twisting a plurality (seven in the illustrated example) of strands 102a into a spirally twisted shape, and a cavity 102b between the strands 102a. Have In the present invention, the cavity 102b is used as a passage for the rust inhibitor. As shown in FIG. 6 (plan view), the lower packing 24 and the upper packing 26 have one parting line 24a, 26a in the radial direction, and the center part is fitted to the peripheral surface of the wire rope 102. Holes 24b and 26b are formed. The dividing lines 24 a and 26 a are provided for attaching the lower packing 24 and the upper packing 26 to the wire rope 102 from the side of the wire rope 102. The fitting holes 24b and 26b have spiral grooves 24c and 26c corresponding to the strands 102a.

  As shown in FIG. 7 (plan view), the bottom packing 37 has one parting line 37a in the radial direction, and a fitting hole 37b for fitting to the peripheral surface of the wire rope 102 is formed at the center. . The dividing line 37 a is provided to attach the bottom packing 37 to the wire rope 102 from the side of the wire rope 102. The fitting hole 37b has a spiral groove 37c corresponding to each strand 102a.

  Next, a rust preventive press-fitting method using the wire rope rust preventive press-fitting device of the present embodiment configured as described above will be described.

  First, preparation work is performed. That is, as shown in FIG. 8, the lower horizontal plate 105 and the upper end surface 108a of the upper and lower horizontal portions constituting the main girder of the suspension bridge, for example, the upper horizontal plate (not shown) and the lower horizontal plate 105, The support plate 51, the lock plate 52, and the adjustment plate 53 provided between the flat socket 108 are removed.

  9A is a plan view of the bearing plate 51, FIG. 9B is a plan view of the lock plate 52, and FIG. 9C is a plan view of the adjustment plate 53. The support plate 51, the lock plate 52, and the adjustment plate 53 can be removed by removing the bolts 54 provided at the four corners of the support plate 51 and sliding them in the horizontal direction.

  Next, a bottom packing arrangement process is performed. That is, the bottom packing 37 is placed on the flat upper end surface 108 a of the socket 108.

  Next, a mounting process is performed. That is, the lower packing 24 is mounted on the bottom packing 37 and the lower end region of the rust prevention target portion 5, and the upper packing 26 is mounted at a predetermined position above the lower packing 24. This mounting step may be performed prior to the bottom packing arrangement step.

  Next, a coating process is performed. That is, the 1st block 31 as a lower end part of the cover 14 is attached so that the guide part 31a may be located on the upper side from the side of the rust prevention target part 5. This attachment is performed such that the lower packing 24 is pressed against the peripheral surface of the rust prevention target portion 5 by tightening with bolts 35. Subsequently, the second block 32 is attached to the wire rope 102 on the first block 31. This attachment is performed by disposing the abutting surface packing 36 between the abutting surfaces 32c and further tightening the bolts 35 with the guide portion 31a inside the guided portion 32a. Along with this, the lower packing 24 and the upper packing 26 are pressed against the circumferential surface of the anticorrosion treatment target portion 5, the upper end portion of the butting surface packing 36 overlaps the upper packing 26, and the lower end portion of the butting surface packing 36 is lower. It overlaps the side packing 24. Subsequently, the third block 33 and the fourth block 34 are sequentially attached to the wire rope 102 on the second block 32. These attachments are also performed in a state in which the upper packing 26 is pressed against the peripheral surface of the rust prevention target portion 5. This completes the coating process.

  Next, a pressing and holding process is executed. That is, the hydraulic manual pump 42 is attached to the second block 32, the hydraulic cylinder 40 is driven by the hydraulic manual pump 42, and the first block 31 is pressed downward by the cylinder rod 40a. This pressing is maintained until the press-in of the rust preventive agent described later is completed. The hydraulic manual pump 42 may be formed in an integrated state attached to the second block 32 in advance.

  Next, a press-fitting process is performed. That is, the electric pump 44 as the press-fitting means 22 is connected to the injection port 20, the rust preventive agent is injected from the injection port 20, and the rust preventive agent is press-fitted into the rust prevention treatment target portion 5. When the rust preventive is press-fitted, air is removed from the air vent 31d and the gap (mainly the cavity 102b) of the wire rope 102 exposed above the upper end of the upper packing 26. The rust preventive can be easily pressed into the upper end and the lower end of 5. Further, as described above, since the injection port 20 is provided at a position lower than the central portion of the cover 14 in the height direction, that is, at a position close to the socket 108 side, the socket portion where rust or the like is likely to accumulate is provided. It is possible to easily fill the rust preventive agent, and as a result, it is possible to make it difficult to collect rust and the like, and it is possible to extend the life of the wire rope 102.

  The pressure of the rust preventive press-fitting is preferably 0.5 to 1.7 MPa. The reason varies depending on the type and viscosity of the rust preventive agent, the outside air temperature that affects the viscosity, the internal conditions of the wire rope 102, and the like, but enables press-fitting into the rust preventive treatment target portion 5. In the case of less than 0.5 MPa, the rust preventive cannot be pressed into the lower end and the upper end of the anticorrosion treatment target portion 5, and conversely, if it is higher than 1.7 MPa, the butt face packing 36 and This is because the rust inhibitor may leak from the bottom packing 37.

  The press-fitting step includes stopping the press-fitting of the rust preventive when the rust preventive exceeds the upper end of the upper packing 26 (or the fourth block 34) and increases by a predetermined height. Moreover, when the solidification time is required for the rust preventive agent, the press-fitting stop state is maintained until the solidification time elapses. This maintenance is also included in the press-fitting step. Further, in the press-fitting step, of the above-described divided packings 26d and 26e, the lower divided packing 26e is mounted in the mounting step and the divided packing 26e is covered with the third block 33 in the coating step. The remaining upper divided packing 26d is attached to the upper side of the divided packing 26e in this press-fitting step, and subsequently, the fourth block 34 covers the divided packing 26d. In this case, the rising position of the rust preventive agent can be confirmed at a lower position by press-fitting the rust preventive agent until it slightly exceeds the lower divided packing 26e, and then the upper divided packing 26d. It becomes possible to easily grasp the press-fitting state of the rust inhibitor up to a slightly higher position, that is, up to the upper end of the rust preventive treatment target portion 5. Moreover, even if the full length of the cover 14 is set to a dimension slightly shorter than the rust prevention process target part 5, the entire range of the rust prevention process target part 5 can be processed.

  Then, the next preparation work is performed. That is, the cover 14 and the various packings 24, 26, 36, and 37 are removed in order to press-fit the rust preventive agent into the rust preventive treatment target portion 5 of the next wire rope 102. In the present embodiment, the cover 14 is divided into four blocks 31 to 34. This is for ease of carrying, and two or three are taken into consideration for portability and assembly. Alternatively, it may be divided into five or more.

  And the antirust agent is filled with respect to the antirust process object part 5 of all the wire ropes 102 suspended by the cable 101 of the suspension bridge 100 by repeating the above process.

  Therefore, according to the present embodiment, the peripheral surface packing 12 (upper packing 26 and lower packing 24) is attached to the rust prevention target portion 5 at the lower end of the wire rope 102, and the socket 108 is moved back and forth. The bottom packing 37 is disposed on the cover 14, and then the cover 14 is placed on the socket 108 via the bottom packing 37 and the circumferential packing 12 is pressed against the rust prevention target portion 5. Next, the bottom packing 37 is pressed against the socket 108 from the upper side toward the lower side by holding the bottom packing 37, and the bottom packing 37 is held in the pressed state. A rust preventive agent is injected into the cover 14 from the injection port 20 provided at a position corresponding to, and the rust preventive agent is press-fitted into the rust preventive treatment target portion 5 with the inside of the wire rope 102 as a main passage.Then, a rust preventive agent can be filled in the rust prevention treatment target portion 5.

  In the above-described embodiment, the butt members 31a, 31b, etc. constituting the blocks 31 of the cover 14 are tightened with bolts 35 at the two butting surfaces 31c in the circumferential direction. The invention is not limited to this, and a connection structure in which the position of one abutting surface 31c can be opened and closed by a hinge or the like may be used.

  In the above-described embodiment, the rust preventive is press-fitted with the wire rope 102 twisted into a shape in which a plurality of strands 102a are spirally twisted. The present invention can also be applied to a general wire rope (for example, a spiral rope) having a cavity that enables press-fitting.

  Furthermore, the present invention is not limited to a suspension bridge having a main girder in which two vertical pieces are provided between the two upper and lower horizontal portions (the upper horizontal plate and the lower horizontal plate), and the two upper and lower horizontal portions. The present invention can also be applied to a suspension bridge including a main girder in which one or more vertical pieces are provided between the portions. In short, the method using the apparatus as described in Non-Patent Document 1 described above is applicable to the present invention even in a place where the tank storing the rust preventive agent cannot be moved along the wire rope. It can be set as a target part, and a rust preventive can be pressed into the target part of the rust prevention treatment.

DESCRIPTION OF SYMBOLS 5 Rust prevention processing part 10 Rust preventive press-fitting device 12 Packing for peripheral surface 14 Cover 14a Lower end part 16 Bottom part packing 18 Pressing means 20 Inlet 22 Press-in means 24 Lower packing 26 Upper packing 24b, 26b, 37b Fitting hole 24c, 26c, 37c Spiral groove 31 First block (lower end member)
32 Second block (main part)
33 3rd block (main part)
34 Fourth block (main part)
31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b Half member 31c, 32c, 33c, 34c Abutting surface 35 Bolt (clamping means)
36 Butting surface packing 37 Bottom packing 40 Hydraulic cylinder (pressing means)
42 Hydraulic manual pump (pressing means)
44 Electric pump (press-fit means)
102 Wire rope 102a Strand 108 Socket

Claims (10)

A method of press-fitting a rust preventive agent into the rust prevention treatment target portion on the upper side of the socket provided at the lower end portion of the wire rope that suspends the main girder of the suspension bridge, using the socket,
A mounting step of mounting the peripheral surface packing that covers the peripheral surface of the wire rope and at least a part of the wire rope is attached to the rust prevention target portion;
A bottom packing arrangement step of arranging a bottom packing on the socket;
Using a cover that has a cylindrical shape by abutting the abutment surfaces of two half members having a semicircular cross section, the cover is placed on the socket via the bottom packing, and the cover A covering step of covering the peripheral surface packing in a state in which the peripheral surface packing is pressed against the rust prevention target portion;
A pressing and holding step for pressing the lower end of the cover against the socket from above and holding the state; and
Holding the state where the lower end of the cover is pressed against the socket, a rust preventive agent is applied to the inside of the cover from the injection port provided in the cover corresponding to the opened portion of the peripheral surface packing. And a press-fitting step of press-fitting the anti-rust agent into the anti-rust treatment target portion. In the rust preventive press-in method of the wire rope according to claim 1,
The lower packing and the upper packing are used as the circumferential packing, and the lower packing covers the lower region of the rust prevention target portion that is lower than the injection port and just above the socket. And a rust preventive press-fitting method for a wire rope, which is above the inlet and covers an upper region of the rust preventive portion. In the rust preventive press-in method of the wire rope according to claim 2,
In the covering step, the abutting surface packing is disposed between the abutting surfaces so that the lower end portion of the abutting surface packing overlaps the lower packing and the upper end portion of the abutting surface packing overlaps the upper packing. A method of press-fitting a rust inhibitor into a wire rope, characterized by comprising: In the rust preventive press-in method of the wire rope according to any one of claims 1 to 3,
The cover includes a lower end member of the cover and a cover main part on the upper side, which are separated from each other, the lower end member of the cover being slidable with respect to the cover main part and between the two A wire rope rust preventive press-fitting method characterized in that the wire rope is fitted in a sealed state. In the rust preventive press-in method of the wire rope according to claim 4,
A method of press-fitting a rust inhibitor for a wire rope, wherein the lower end member of the cover is pressed downward against the main part of the cover by pressing means. A device for press-fitting a rust preventive agent into the interior of the rust prevention treatment target portion on the upper side of the socket provided at the lower end portion of the wire rope that suspends the main girder of the suspension bridge,
Mounted so as to cover the peripheral surface of the rust prevention treatment target part, and at least a part of the peripheral surface packing,
The two half-members whose cross-sections are semi-circular are abutted against each other to form a cylindrical shape, put on the socket, and press the circumferential surface packing against the rust-proofing target part A covering covering;
Tightening means that abuts the butting surfaces of the two halved members to form a cylinder;
A bottom packing provided between the socket and the cover;
A pressing means for pressing the lower end of the cover body from above to below the socket;
A rust preventive agent is injected into the cover from an inlet provided in advance corresponding to the opening of the peripheral surface packing of the cover, and the rust preventive is press-fitted into the rust preventive treatment target portion. A wire rope rust preventive press-fitting device, comprising: In the rust preventive press-fitting device for a wire rope according to claim 6,
The peripheral surface packing includes a lower packing that covers a lower region of the rust prevention target portion directly above the socket, and an upper packing that covers an upper region of the rust prevention target portion that is separated from the lower region by an appropriate length. A wire rope rust preventive press-fitting device, wherein the lower packing, the upper packing, and the bottom packing have fitting holes that fit into the wire rope. In the wire rope rust preventive press-fitting device according to claim 7,
The wire rope is twisted into a shape in which a plurality of strands are spirally twisted, and the inner packing is provided so that the lower packing, the upper packing, and the bottom packing can be in close contact with the peripheral surface of the wire rope. A rust preventive press-fitting device for a wire rope, comprising a spiral groove corresponding to the strand on the surface. In the rust preventive press-fitting device for a wire rope according to any one of claims 6 to 8,
The cover has a lower end member of the cover and a cover main part on the upper side, and the cover main part is divided into a plurality of parts in the axial direction, and the plurality of divided parts are the wires. A wire rope rust preventive press-fitting device characterized by being stacked along a rope. In the rust preventive press-fitting device for a wire rope according to claim 7 or 8 ,
The cover has a lower end member of the cover and a cover main part on the upper side, and the cover main part is divided into a plurality of parts in the axial direction, and the plurality of divided parts are the wires. It is configured to be stacked along a rope, and is one of the parts constituting the cover main body and divided into a plurality of parts in the axial direction, and the upper part of the lower packing and the lower part of the upper packing are A wire rope rust preventive press-fitting device, wherein the rust preventive treatment target part is pressed.

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