JP3563550B2 - Wire / rope terminal sealing structure - Google Patents

Description

[0001]
【Technical field】
The present invention relates to a sealing structure for a terminal portion of a wire rope.
[0002]
[Prior art and its problems]
A wire rope is generally used to tie two objects apart from each other, or to pull or suspend an object, so that mechanical strength is required. Further, when the wire rope is used in water, seawater, seashore, etc., it is necessary to prevent the wire rope from being corroded by contact with water. Therefore, when used in seawater or the like, the part connecting the wire rope and the object needs to have a structure that has high tensile strength, high fatigue resistance and high water resistance. Such performance is particularly required at the end of the wire rope. Since the wire rope has conductivity, the wire rope can be used as a telecommunication line, but in that case, it is necessary to ensure sufficient electrical insulation.
[0003]
DISCLOSURE OF THE INVENTION
An object of the present invention is to provide a sealing structure for a wire rope terminal having high mechanical strength.
[0004]
Another object of the present invention is to provide a wire rope terminal sealing structure having high mechanical strength and high watertightness.
[0005]
It is another object of the present invention to provide a wire rope terminal sealing structure in which a wire rope can be used as an electric communication line while ensuring high mechanical strength and sufficient electrical insulation.
[0006]
In the sealing structure for a wire rope terminal according to the present invention, the loosened wire of the wire rope inserted into the terminal socket is fixed by passing through a hole of a metal plate. It is characterized by being embedded in the resin layer in the terminal socket.
[0007]
According to the present invention, the distal end portion of the unraveled wire of the wire rope is fixed to the metal plate, and the metal plate and the wire are embedded in the resin layer in the terminal socket. The wire is fixed through a hole formed in the metal plate. In addition, since the wire strand is in a state of being unraveled, it has a spiral shape. Since the tensile force acting on the wire rope is dispersed between the wire strand and the metal plate in the resin layer, it is difficult for the wire rope to fall out of the terminal socket, ensuring high tensile strength and improving fatigue resistance. I do.
[0008]
The fixing of the wire to the metal plate is generally performed by soldering or brazing.
[0009]
In the sealing structure of the wire rope terminal according to the present invention, the unraveled wire of the wire rope inserted into the terminal socket is fixed by passing through the hole of the metal plate. The terminal socket is embedded in the first resin layer, and the opening of the terminal socket is filled with the second resin.
[0010]
By providing the second resin layer in the opening of the terminal socket, a water stopping effect can be obtained. The second resin is preferably a soft resin that is deformed by water pressure. Since the soft resin is in close contact with the surrounding terminal socket, a high waterproof effect is obtained, and corrosion of the wire rope due to intrusion of seawater or the like is prevented. In the wire / rope terminal sealing structure according to the present invention, high tensile strength is maintained and watertightness is improved.
[0011]
Since the wire strand has conductivity, the wire can be used as a transmitter of an electric signal. The present invention provides a structure in which a wire rope can be used as a telecommunication line.
[0012]
In the sealing structure of the wire rope terminal according to the present invention, the loosened wire of the wire rope inserted into the terminal socket is fixed by passing through the hole of the metal plate. The first resin layer embedded in the first resin layer and embedded with the wires and the metal plate of the wire rope is placed in the terminal socket, and the first resin layer and the inner surface of the terminal socket are inserted. Are filled with a second insulating resin.
[0013]
The wire and the metal plate of the wire rope are embedded in the first resin layer. A second resin layer is provided between the first resin layer and the terminal socket. Even if a wire rope or a part of a metal plate is exposed from the first resin layer, a second resin layer is provided between the wire rope and the socket. The metal plate and the socket are electrically insulated. By thus doubling the resin layer in the terminal socket, the electrical insulation between the wire strand and the terminal socket (generally made of metal) can be enhanced. High tensile strength.
[0014]
The first resin layer and the second resin layer are preferably formed of a hard resin containing few impurities. High-purity resin has a dense crystal and high water-tightness, so that a waterproof effect can be obtained. In order to further increase the watertightness, the opening of the terminal socket is filled with a third resin (preferably a soft resin).
[0015]
When a wire rope is used as a telecommunication line, the end of the electric wire is electrically connected to a metal plate and fixed.
[0016]
Preferably, the terminal socket is covered with a cover, and a resin is further filled between an inner surface of the cover and an outer surface of the terminal socket. The cover and this resin layer realize a terminal structure that is resistant to external impacts and has a high waterproof effect. As this resin, it is preferable to use a soft resin which is deformed by water pressure.
[0017]
【Example】
1 is a perspective view showing an embodiment in which the terminal sealing structure is applied to a wire rope terminal, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a sectional view taken along the line III-III in FIG. It is sectional drawing. This terminal sealing structure has high mechanical strength, high watertightness and high electrical insulation.
[0018]
Since the sealing structure of the wire rope terminal shown in FIGS. 1, 2 and 3 will be clarified by describing the manufacturing process, the sealing of the wire rope terminal will be described with reference to FIGS. The manufacturing process of the structure will be described.
[0019]
4 to 7 show a manufacturing process of the wire / rope terminal sealing structure.
[0020]
In FIG. 4, the terminal socket 10 is made of metal (for example, stainless steel) and has a central portion formed in a conical shape, and a short large-diameter cylindrical portion and a small-diameter cylindrical portion are integrally provided at both ends thereof. I have. The inside of the terminal socket is hollow, and the inside space is also conical at the center, and large and small diameter cylindrical spaces are connected to both ends. The outer peripheral surface of the conical portion of the terminal socket 10 is formed with two annular protrusions 13a for retaining. From the large-diameter cylindrical portion of the terminal socket 10, two connecting arms 11 extend in parallel in the longitudinal direction. These connecting arms 11 are provided with bearing holes 12. On the outer peripheral surface of the small-diameter cylindrical portion of the terminal socket 10, there are formed two annular protrusions 13b for retaining.
[0021]
The wire rope 40 generally includes a core wire, a strand twisted around the core wire, and a coating (insulator) 41 made of polyethylene or the like covering the outside of the core wire. The core wire and the strand are formed by twisting a plurality of wire strands 42. The distal end of such a wire rope 40 is inserted into the terminal socket 10 from the small end of the terminal socket 10 as shown in FIG. The polyethylene coating 41 at the end of the wire rope 40 protruding from the large-diameter end of the terminal socket 10 is removed, exposing the wire 42.
[0022]
In order to form a resin layer that covers the tip of the wire rope 40, the terminal socket 10 is shifted in a direction away from the tip of the wire rope 40. Therefore, the terminal socket 10 is not shown in FIG.
[0023]
In FIG. 5 (A), the exposed wire strand 42 is loosened, and a perforated disk 50 is fixed to the end of the wire strand 42. The wire strands 42 are kept loose and are not straightened. FIG. 8 is a plan view showing the appearance of the perforated disk. FIG. 9 is a perspective view showing a connecting portion between a wire strand and a perforated disk.
[0024]
The disk 50 is made of metal (for example, an iron plate), and has a center hole 51 on its surface and a plurality of peripheral holes 52 on a concentric circle centered on the center hole 51. The center hole 51 is slightly larger than the peripheral hole 52.
[0025]
The disc 50 is preferably provided with a number of holes (center and peripheral holes) equal to the number of unraveled strands 42 of the wire rope 40. Of the unraveled wire strands 42, one core wire passes through the center hole 51, and the other strands pass through the peripheral hole 52 one by one. When the number of wire strands 42 is large, a plurality of wire strands 42 may be passed through one hole.
[0026]
Except for the core wire of the center hole 51, the distal end of the wire strand 42 coming out of the peripheral hole 52 is bent at an angle of 90 ° or more. The tip of the bent wire 42 is soldered or brazed to the disk 50 (reference numeral 53 indicates solder or brazing). Solder or wax may be spread over the entire surface of the disk 50. Since the wires 42 are fixed to the disk 50 by soldering or brazing, the wires 42 and the disk 50 are firmly connected.
[0027]
Since the wire strand 42 of the wire rope 40 is generally made of a conductive metal member, the wire rope 40 can be used as one electric signal transmission path. To use the wire rope 40 as an electric signal transmission path, an electric cable 43 is connected to an end of the wire rope 40. That is, the core wire of the wire 42 coming out of the center hole 51 and the end of the electric wire 43 whose end is removed from the end of the electric wire 43 covered with the insulating sheath are soldered or brazed. And they are fixed to the disk 50.
[0028]
FIG. 10 shows another example of a connection portion between a perforated disk and a wire strand.
[0029]
The tip of each wire 42 passing through the peripheral hole 52 is bent into a hook shape, and a bump 54 is attached between the hook-shaped portion of the wire 42 and the disk 50. The hump 54 can be made by caulking the aluminum tube through the aluminum wire through the wire 42 or by folding another metal piece into two pieces and then caulking the metal piece with the wire 42 interposed therebetween. The bumps 54 can prevent the wire strands 42 from coming off the disk 50. Other configurations are the same as those shown in FIG.
[0030]
In FIG. 5B, the end of the electric wire cable 43, the disk 50, the entire wire strand 42 from which the coating has been removed, and a part of the wire rope 40 coated with polyethylene or the like are separated. Put in 60. The internal space of the split mold 60 is similar in shape to the internal space of the conical portion and the small-diameter cylindrical portion of the terminal socket 10, and has a slightly smaller diameter than the internal space of the terminal socket 10. The split mold 60 is also formed with an annular concave portion 60a at the end where the diameter of the internal space is the largest.
[0031]
The wire strand 42, the disk 50, etc. are positioned at the center of the split mold 60, and the portion of the wire rope 40 that is drawn out from the split mold 60 is filled with oil clay 61 for preventing resin leakage. The disk 50 is located near the end of the inner space of the split mold 60, but there is a gap between the outer periphery thereof and the inner wall surface of the split mold 60.
[0032]
The split mold 60 is set up vertically, and the hard resin 21 is injected into the split mold 60 from the electric cable 43 side. The wire strand 42 and the disk 50 are embedded in the hard resin 21.
[0033]
The wire strand 42 of the wire rope 40 is in a spiral state in which it is loosened. Therefore, when hardened with the hard resin 21, it is very difficult to come off.
[0034]
In FIG. 5 (C), after hardening of the hard resin, the hard resin 21 is taken out of the split mold 60, and a rubber putty (for example, butyl rubber putty) 25 is filled in the boundary between the hard resin 21 and the wire rope 40, and From above, the rubber tape 26 is wound from the wire rope 40 to the small-diameter cylindrical portion of the hard resin 21. The diameter of the small-diameter cylindrical portion of the hard resin 21 around which the rubber tape 26 is wound is substantially equal to the diameter of the small-diameter cylindrical portion of the terminal socket 10.
[0035]
FIG. 11 is a perspective view showing the appearance of the hard resin around which the rubber tape 26 is wound.
[0036]
As described above, since the annular concave portion 60a is formed in the split mold 60, an annular stopper 21a is formed at the end of the hard resin 21 where the conical portion has the largest diameter. A plurality of cuts 21b are formed around the annular stopper 21a by cutting a part of the stopper 21a using a grinder, for example. The cut 21b is used as an injection port when a hard resin 22 described later is injected.
[0037]
As shown in FIG. 6A, the terminal socket 10 in which the wire rope 40 has been inserted is moved to the terminal portion of the wire rope 40. As a result, the terminal portion of the wire rope 40 covered with the hard resin 21 is drawn into the terminal socket 10, and the annular stopper 21a contacts the inner wall of the conical portion of the terminal socket 10.
[0038]
A rubber putty 27 is packed at the boundary between the electric cable 43 and the hard resin 21.
[0039]
Further, in FIG. 6B, the terminal socket 10 is set upright, and the hard resin 22 is inserted between the outer peripheral surface of the hard resin 21 and the inner peripheral surface of the terminal socket 10 through a notch 21b formed around the annular stopper 21a. And the hard resin 22 is filled into the large-diameter cylindrical portion of the terminal socket 10 to such an extent that the rubber putty 27 is buried.
[0040]
The wire strand 42 is fixed by the hard resin 21. The hard resin 22 ensures electrical insulation between the wire strand 42 (and the disk 50) of the wire rope 40 and the terminal socket 10.
[0041]
It is preferable that the hard resin 21 and the hard resin 22 are so-called high-purity epoxy resins having few impurities. Epoxy resins with high purity are hard and have a high watertightness due to their dense crystal structure. By loosening the tip of the wire rope 40 into a strand and embedding it in a high-purity epoxy resin, it is possible to prevent the wire rope 40 from coming out of the terminal socket 10 and to prevent seawater from entering.
[0042]
Since the ends of the wires 42 are fixed to the disk 50, and both the wires 42 and the disk 50 are embedded in the hard resin 21, the tensile force acting on the wire rope 40 is dispersed in the hard resin 21 and the tensile strength is increased. And the fatigue resistance is enhanced.
[0043]
Further, epoxy resin has high insulating properties. Since the epoxy resin is double-filled around the wire strand 42 and the disk 50, the electrical insulation between the wire strand 42 (and the disk 50) and the terminal socket 10 is high. .
[0044]
Next, a soft resin 23 is injected into the large-diameter cylindrical portion of the terminal socket 10 from outside the hard resin 22. As the soft resin, urethane resin, silicon resin, or the like is used. The soft resin is deformed by the water pressure given from the outside and adheres to the inner surface of the terminal socket 10, so that a high waterproof effect can be obtained.
[0045]
A rubber tape 28 is wound around a small cylindrical portion of the terminal socket 10 so as to cover a part of the conical portion of the terminal socket 10 and a part of the wire rope 40. By wrapping rubber tape from the terminal socket 10 to the wire rope 40, fatigue due to bending of the wire rope 40 at the connection portion between the terminal socket 10 and the wire rope 40 and corrosion due to seawater or the like are prevented, and the cable is resistant to refraction. The structure is realized. The protrusion 13b formed on the outer periphery of the small-diameter cylindrical portion of the terminal socket 10 prevents the rubber tape 28 from coming off.
[0046]
7, a protective cover 30 is provided so as to cover the conical portion and the small-diameter cylindrical portion of the terminal socket 10, the entire rubber tape 28, and a part of the wire rope 40. The protective cover 30 is made of metal and is formed by combining two hollow halves.
[0047]
The protective cover 30 has a large diameter cylindrical portion covering the terminal socket 10, a conical portion covering the distal end of the rubber tape 28 from the distal end of the terminal socket 10, and a small diameter cylindrical portion covering the wire rope 40. Is formed. The inside diameter of the small-diameter cylindrical portion of the protective cover 30 is substantially equal to the outside diameter of the wire rope 40. The protective cover 30 is fixed to the end of the large-diameter cylindrical portion of the terminal socket 10 by a bolt 32 at the large-diameter cylindrical portion. In the small-diameter cylindrical portion of the protective cover 30, the half of the protective cover 30 is connected by bolts 33 (see FIG. 1).
[0048]
Finally, the soft resin 24 is injected into the protective cover 30 from the resin injection port 34 formed in the protective cover 30 (see FIGS. 2 and 3). At this time, a clay wall 35 (shown by a dashed line) may be formed around the resin injection port 34. Since the terminal socket 10 is protected by both the protective cover 30 and the soft resin 24, the terminal socket has a terminal structure that is resistant to external impact. Since the protective cover 30 and the soft resin 24 absorb the external impact, the deterioration of the hard resins 21 and 22 due to the external impact is prevented, and the overall fatigue resistance of the terminal structure is improved. Further, since almost the entire outer surface of the terminal socket 10 is covered with the soft resin, the waterproof effect can be enhanced. The protrusion 13 a formed on the outer periphery of the conical portion of the terminal socket 10 strengthens the connection between the soft resin 24 and the terminal socket 10.
[0049]
The boundary between the protective cover 30 and the wire rope 40, the boundary between the protective cover 30 and the terminal socket 10, the joint between the protective covers 30, and the resin injection port 34 for injecting the soft resin 24 are waterproofed by a seal. Good to put.
[0050]
The above-described sealing structure of the wire rope terminal is provided at both ends of the wire rope, if necessary.
[0051]
The wire rope end obtained in this manner has a high tensile strength, is resistant to external impacts, and has a structure in which seawater, rainwater, and the like hardly enter. Further, the wire rope 40 can be used as a signal transmission path. For example, at one end of the wire rope 40, an underwater sensor is attached using the bearing hole 12 of the connecting arm 11 of the terminal socket 10, the electric cable 43 is connected to the underwater sensor, and the underwater sensor is submerged. The other end of the wire rope is connected to the observation ship using the bearing hole 12 of the connecting arm 11 of the terminal socket 10 having the sealed structure. The electric cable 43 pulled out from the other end is connected to a signal processing device mounted on the observation ship. The observation data such as the tide and the seawater temperature collected by the sensor is transmitted to the observation ship through the wire rope 40.
[0052]
In the above-described manufacturing process, the annular stopper 21a of the hard resin 21 in which the wire strand 42 and the disk 50 are embedded may not necessarily be formed. In this case, the resin 22 may be injected with a gap secured between the hard resin 21 and the inner surface of the terminal socket 10.
[0053]
The above-described terminal sealing structure has three functions of high mechanical strength, high watertightness, and high electrical insulation. The terminal sealing structure having only high mechanical strength has a simpler structure as described below.
[0054]
After attaching the disk 50 to the loosened wire 42 of the wire rope 40 (FIG. 5 (A)), as shown in FIG. Move to the terminal part of 40. The disk 50 is positioned near the end of the conical portion of the interior space of the terminal socket 10. There is a gap between the outer circumference of the disk 50 and the inner circumference of the terminal socket 10.
[0055]
The small-diameter cylindrical portion of the terminal socket 10 is covered with an oil clay 61 for preventing resin leakage. The terminal socket 10 is set upright, and the hard resin 21 is injected into the terminal socket 10 from the large-diameter cylindrical side of the terminal socket 10 through the gap between the outer periphery of the disk 50 and the inner periphery of the terminal socket 10. The hard resin 21 fills the entire inner space of the small-diameter cylindrical portion and the inner space of the conical portion of the terminal socket 10, and also fills the large-diameter cylindrical portion of the terminal socket 10 to the extent that the disk 50 is filled. . The whole wire element 10 and the disk 50 are embedded in the hard resin 21.
[0056]
Thus, the wire / rope terminal sealing structure is completed. Of course, the oil clay 61 is removed. The terminal sealing structure shown in FIG. 12 has a high tensile strength and a simple structure.
[0057]
In order to secure a watertight structure, a rubber putty 25 is packed at the boundary between the hard resin 21 and the wire rope 40, and a rubber tape 26 is wound thereon. The rubber tape 26 may be wound around the small diameter cylindrical portion of the terminal socket 10. Thereafter, a rubber tape 28 is wound so as to cover the small-diameter cylindrical portion and the conical portion of the terminal socket 10 and a part of the wire rope 40. A large-diameter cylindrical portion of the terminal socket 10 is filled with a soft resin 23 (see FIG. 6B).
[0058]
In order to provide a further waterproof function and a shock absorbing function, a protective cover 30 covering a part of the terminal socket 10, the rubber tape 28 and the wire rope 40 is provided, and a soft resin 24 is provided inside the protective cover 30. (See FIGS. 7, 2 and 3).
[0059]
When electric signals are transmitted using the wire / rope terminal sealing structure shown in FIG. 12, the diameter of the disk 50 may be reduced, or the internal space (particularly, a conical portion) of the terminal socket 10 may be increased. Good. The hard resin 21 is thickly filled around the wire strand 42 and the disk 50, so that insulation between the wire strand 42 and the disk 50 and the terminal socket 10 can be ensured.
[0060]
When the waterproof performance is ensured by the hard resins 21 and 22, or when high waterproof performance is not required for the terminal portion of the wire rope 40, the soft resin 23 is not necessarily injected into the terminal socket 10. There is no.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a sealing structure of a terminal portion of a wire rope.
FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 3 is a sectional view taken along line III-III in FIG. 1;
FIG. 4 is a cross-sectional view showing a manufacturing process of the sealing structure of the terminal portion of the wire rope.
FIGS. 5A, 5B, and 5C are cross-sectional views showing a manufacturing process of a sealing structure for a terminal portion of a wire rope.
FIGS. 6A and 6B are cross-sectional views showing a manufacturing process of a sealing structure of a terminal portion of a wire rope.
FIG. 7 is a cross-sectional view showing a manufacturing process of the sealing structure of the terminal portion of the wire rope.
FIG. 8 is a plan view of a perforated disk.
FIG. 9 is a perspective view showing a connecting portion between a wire strand and a perforated disk.
FIG. 10 is a perspective view showing another example of a connection portion between a wire strand and a perforated disk.
FIG. 11 is a perspective view showing an appearance of an end of a wire rope embedded in the hard resin shown in FIG. 5 (C).
FIG. 12 is a cross-sectional view showing a step of manufacturing another sealing structure of the terminal portion of the wire rope.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Terminal socket 11 Connecting arm 12 Bearing holes 13a, 13b Retaining annular projections 21, 22 Hard resin 23, 24 Soft resin 25, 27 Rubber putty 26, 28 Rubber tape 30 Protective cover 40 Wire rope 41 Polyethylene coating 42 Wire strand 43 Electric wire cable 50 Perforated disk 51 Center hole 52 Peripheral hole

Claims (8)

The loosened wire of the wire rope inserted into the terminal socket is fixed by passing through the hole of the metal plate, and the wire and the metal plate are embedded in the resin layer in the terminal socket. ， Sealing structure of wire rope terminal. 2. The wire / rope terminal sealing structure according to claim 1, wherein the terminal socket is covered by a cover, and another resin is filled between an inner surface of the cover and an outer surface of the terminal socket. The loosened wire of the wire rope inserted into the terminal socket is fixed by passing through the hole of the metal plate, and the wire and the metal plate are embedded in the first resin layer in the terminal socket. Rarely, a wire / rope terminal sealing structure in which an opening of the terminal socket is filled with a second resin. 4. The wire / rope terminal sealing structure according to claim 3, wherein the terminal socket is covered by a cover, and a third resin is filled between an inner surface of the cover and an outer surface of the terminal socket. The loosened wire of the wire rope inserted into the terminal socket is fixed by passing through the hole of the metal plate, and the wire and the metal plate are embedded in the first resin layer in the terminal socket. Rarely, the first resin layer in which the wire and the metal plate of the wire rope are embedded is placed in a terminal socket, and a second insulating layer is provided between the first resin layer and the inner surface of the terminal socket. Sealing structure of wire rope end filled with conductive resin. The wire / rope terminal sealing structure according to claim 5, wherein an end of an electric wire is electrically connected to and fixed to the metal plate. 7. The wire / rope terminal sealing structure according to claim 5, wherein a third resin is filled in the opening of the terminal socket. The wire / rope terminal sealing structure according to claim 7, wherein the terminal socket is covered by a cover, and a fourth resin is filled between an inner surface of the cover and an outer surface of the terminal socket.

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