JPH0320963B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] This invention relates generally to armored cables, stranded wire networks, or the like, and more particularly to one layer of said armored cables, stranded wire networks, etc. Or regarding the fixing of multiple armor lines.

[Prior art]

Various methods and devices are already known for securing elongated cylindrical members to connecting devices or similar members. However, all hitherto known devices of this type do not allow the force of securing an elongated tubular member to a connecting member or similar member to be such that any force which tends to separate the tubular member from the connecting member There is a common disadvantage that exists regardless of the magnitude of the longitudinally directed force. This is an avowed disadvantage, especially when the tubular member is an armor layer or the like, and its main function is that of any element, e.g. an optical fiber disposed within the tubular member. This is the case when the purpose is to protect the object from damage. Under such circumstances, even a slight longitudinal displacement of the tubular member from the connecting member may destroy the element or the optical fiber located inside the tubular member; This is because such optical fibers are substantially unable to stretch under applied pressure, but rather break.

[Purpose of the invention]

From this point of view, the general object of the present invention is to overcome the disadvantages of the prior art.

More particularly, it is an object of the invention to provide a method for fixing a tubular member to a connecting member without the disadvantages of the prior art.

Another object of the invention is to develop a method of the above type that is particularly suitable for use with cables and similar elongated member elements, including wires or similar elongate shapes.

A subsidiary object of the present invention is to devise a fixation device that is substantially immune to certain longitudinally oriented forces that tend to separate the elongated member from the connecting member.

[Structure of the invention]

According to one aspect of the invention, there is provided a method of securing a substantially cylindrical layer of an elongate member to a fixed member, the method comprising the steps of: arranging a first gripping member and a second gripping member outwardly in at least partial registration with each other; said first gripping member and said second gripping member; pressing the second member in a radial direction of the elongated member toward the first gripping member such that the cylindrical layer is grasped between the first and second gripping members; connecting a gripping member to a fixed member, the increase in axial load on the elongated member caused by the connection being a gripping force applied to the cylindrical layer by the first and second gripping members; something that increases
A method is provided for securing a substantially cylindrical layer of an elongate member comprising a substantially cylindrical layer to a fixation member.

According to another aspect of the invention, a securing device for securing a substantially cylindrical layer of an elongated member, the securing device comprising a securing member wall, one end abutting the wall. An annular first gripping member and a second gripping member suitable for being disposed inside the cylindrical layer of the elongated member, and suitable for being disposed outside the cylindrical layer. suitable, at least partially mating with the first gripping member and having one end abutting the wall and movable in a radial direction relative to the first gripping member; a second gripping member and a securing collar, the locking collar being adapted to be secured to the wall for securing the first and second gripping members, and adapted for axial movement toward the wall; suitable for producing radial movement of the second gripping member, during operation of which the first and second gripping members and the securing collar apply an applied force to the elongated member. a securing device is provided for securing a substantially cylindrical layer of an elongate member that cooperates to increase the gripping force applied to the cylindrical layer in response to an increase in the axial load applied to the elongated member. Ru.

〔Example〕

The above description and other features and objects of the present invention will become more clearly understood by reference to the following description in conjunction with the accompanying drawings, in which FIG. FIG. 2 is an end view of the inner gripping member that can be used in the device shown in FIG. 1, showing the fixed state in the direction of arrow A in FIG. 1 in an enlarged manner; 3 is a view corresponding to FIG. 2 but showing an outer gripping member that may be used in the apparatus of FIG. 1; and FIG. 4 is a view of a cable having two layers of armored wire and an inner gripping member. FIG.

Referring first to FIG. 1, which will be described in more detail below with reference to the drawings, there is illustrated a securing device that may be used to secure a tubular layer of an elongated member, such as a cable, said tubular layer being preferably is in the form of a plough steel armor wire 1 placed helically applied in a single layer over the cable core 2 towards the fixing plate 3;
The above fixing plate is, for example, a repeater container.
housing) or a coupling chamber (not shown). The cable core 2 may be joined to the cable tail 4 using a conventional graded dielectric injection molding as shown at 5. The cable core 2 can be, for example, a lightweight submarine cable or incorporate an optical fiber. Particularly in the case of fiber optic submarine cables, it is necessary that the optical fibers have a minimum elongation to prevent breakage, especially during cable installation and recovery, when the tension applied to the cable is at its highest. Therefore, it is preferable that the armor wire does not shift relative to the fixing member due to an increase in the cable load on the armor fixing portion, and that the optical fiber is not strained. Thus, the fixing device of the present invention is designed so that as the load on the cable increases, the fixing force of the armored wire increases.

The armor wire 1 is held between a first (inner) gripping member 6 and a second (outer) gripping member 7 which are pressed together by a fastening collar 8. The fastening collar 8 is positioned by a stud 9 fixed to the fastening plate 3 and has an inwardly sloping hollow which is connected to the outwardly sloping surface provided by the outer gripping member 7. It is in direct contact with 10. The outer gripping member 7 is longitudinally divided and comprises a plurality of separate sections, of which four identical sections 11 are present in the construction shown in FIG. The inner gripping member 6 is cylindrical together with the inner hollow part 12,
The inner hollow part 12 is shaped to match the main cable core 2 to be used. In the illustrated example, the hollow part 12 is cylindrical over a large area in the longitudinal direction, and has a diameter corresponding to the diameter of the cable tail 4, and the remaining part is the thick part of the cable core 2 and the cable tail 4. It is sloped to match the slope shape at 5 between .

The outer surface 13 of the inner gripping member 6 is
and the outer gripping member 7 to facilitate gripping of the fixing line 1. As shown in FIG. 2, the outer surface 13 is provided with a machined outer portion helical groove 14 in which each individual piece of armor wire 1 is placed, the helical groove having a predetermined cable pitch diameter and It is structured so that the armor line 1 is maintained at the installation angle. This ensures minimal bedding down of the wire 1 during the initial loading, and the wire 1 is subject to tension loading until it is purely fixed. However, such an inner gripping member 6
The manufacturing cost is high because machining is required. Therefore, the outer cylindrical surface 13 is therefore provided with a helical thread, preferably a helical thread particularly suitable for gripping.

The inner hollow part of the outer gripping member 7 formed by the four sections 11 (FIG. 3) is a parallel hollow part in which a spiral thread groove is formed, and the shape of the spiral thread groove is similar to that of the armor wire 1. It has a shape that seems to be wedged into it. The helical threads of the outer gripping member 7 are preferably opposite in shape to the helical threads provided on the outer cylindrical surface 13 and are suitable for obtaining maximum gripping effectiveness.

In operation, the outer gripping member 7 is subjected to a force applied in the radial direction towards the inner gripping member 6 by tightening the locking nut pair 15 against the stud bolt 9, depending on the segmented nature of the outer gripping member 7. Then, the inclined surface of the fixing collar 8 and the outer gripping member 7
The fixed plate 3 and the inner gripping member 6 cooperate with each other.
The fitting body of the outer gripping member 7 and the outer gripping member 7 cooperate with each other. Once the fixation wire 1 is captured in the fixation device, any increase in cable strain that tends to pull the armored wire end away from the fixation plate 3 will be avoided by the cooperating sloped surfaces of the fixation member. Generate a corresponding greater grasping force within yourself.

As shown in FIG. 3, each outer gripper section 11 is axially grooved at 18 from the outer periphery.
The three sections are effectively interdigitated with each other by means of an axially reduced thickness section 19. The outer gripping member 7 of FIG.
The arrangement is such that one section is not placed on more than one armor line 1.

To facilitate assembly of the fixation device, the inner gripper section 6 is provided with two screw holes 16, and the outer gripper section 11 is provided with an individual screw hole 17. The armor wire fixing device shown in FIG. 1 is assembled and used as follows. The cable core 2 and the armored wire 1 to be terminated or joined are connected to the cable tail 4 by any conventional method. The inner grip member 6 is fixed to the fixed plate 3 by a screw (not shown) that connects the screw hole 16. When the armored wire 1 is cut to the appropriate length, the cable tail 4 is passed through the hollow part 12 of the inner gripping member 6, and each piece of the armored wire 1 is placed in the appropriate part within the spiral groove 14. placed. The outer gripping member section 11 is secured to the fixing plate 3 by means of screws (not shown) connecting threaded holes 17 to hold the arranged armor wire 1 in position. If necessary, the fastening collar 8 can be slid over the cable end before the cable tail 4 is inserted into the inner gripping member 6, and the fastening nut pair 15, which is initially inserted simply by loosening it, can be inserted. is placed on the stud 9 by the first nut. Then the screws fixing the inner and outer gripping members 6, 7 to the fixing plate 3 are removed,
The first nut of the locking nut pair 15 is then tightened onto the stud 9 with a predetermined torque. Due to the torque, at least the helical thread groove provided in the outer member 7 bites into the armor wire 1, so that it is firmly gripped between the inner grip member 6 and the outer grip member 7. . The second nut of the fixing nut pair 15 is then screwed onto the stud 9 and fixed onto the fixing plate 3.
The fixing collar 8 is fixed in place.

Preferably the fixing plate is made of BS970EN25 steel, the fastening collar 8 is made of BS970EN25 steel and the inner and outer gripping members are made of high carbon content steel.
Manufactured to BS4659BD3.

Up to now, a fixing device for a single-layer spirally wound steel armor wire 1 has been described. Of course, similar fastening devices as described above in conjunction with FIGS. 1-3 can be used with two layers of counter-laying or co-laying steel armor wire. At least two
In the case of a cable having layers of armored wires 21 and 22, however, the innermost layer of armored wires 21 provides a smoother cylindrical surface for engagement by the outermost layer of armored wires 22. It is suitable to provide in each of the outer interspaces of the innermost layer of the armored wire 21 in the vicinity of the fixing device an intermediate member, for example constituted by a segmented member 20 with a suitable cross-section, which The outermost layer of 22 is counterforced by an outer gripping member 7 (not shown) while utilizing the fixation device, thereby spreading the gripping force more evenly. The intermediate member can also be constituted by a multi-segmented support tube (not shown) provided in the innermost layer of the armor wire 21 in the vicinity of the fixing device, and the wires 21 and 22
Separate the layers by keeping a predetermined space. The support tube may include four sections.

Having described above the fixation of armored cables, the present invention also includes stranded ropes or similar elements, or other elongated members with cylindrical layers to be gripped, e.g. optical or electrical conductors. It can be applied to one or more layers of outer strand reinforcement steel that can cooperate with fluid flow tubes with or without.

Although the principle of the invention has been described above in connection with a specific device, it is clear that this description is merely an example and is not intended to limit the scope, purpose, or scope of the appended claims of the present invention. .

[Brief explanation of drawings]

FIG. 1 is a partial axial view of the armor wire fixing device according to the present invention, and FIG. 2 is an end view of an inner gripping member that can be used in the device shown in FIG. 1, in the direction of arrow A in FIG. FIG. 3 is a diagram corresponding to FIG. 2, but shows an outer grip member that can be used in the device shown in FIG. 1, and FIG. 2 is a schematic cutaway view of a cable with layers and an inner gripping member; FIG. (Explanation of symbols), 1... plow-shaped steel armored cable, 2... cable core, 3... fixing plate, 4... cable end, 6... first grip member, 7... second
gripping member, 8... fixing collar, 9... stud bolt, 10... outwardly inclined surface, 12... inner cavity, 13... outer surface, 14... outer portion spiral groove, 15...... Locknut pair, 16...through hole,
17... Through hole, 20... Appropriately sectioned members, 21... Armor wire.

Claims (1)

[Scope of Claims] 1. A method of fixing a substantially cylindrical layer of an elongated member to a fixing member, the method comprising: insertable into the inner side of the cylindrical layer; an annular body having an annular first gripping member and a substantially cylindrical inner surface that can fit into an outer circumferential surface of the first gripping member; When the annular body is inserted into the cylindrical layer, a tapered portion is formed such that the thickness decreases from the end of the cylindrical layer in the longitudinal direction of the cylindrical layer. a first step of preparing a second gripping member having a structure divided into a plurality of sections in the longitudinal direction; a second step of inserting and arranging the first gripping member inside the cylindrical layer; step, fitting and mounting the second gripping member on the outer surface of the cylindrical layer into which the first gripping member is inserted so that the both gripping members at least partially overlap each other; a third step of: fitting onto the outer surface of the second gripping member a fixing collar portion having a cylindrical inner surface comprising a tapered portion that matches the tapered portion of the second gripping member; radially of the cylindrical layer of the elongated member toward the first gripping member such that the cylindrical layer is grasped between the first gripping member and the second gripping member. to the second
a fourth step of pressing the first and second gripping members or the fastening collar to a fixing member so that a subsequent increase in the axial load on the elongate member and a fifth step of increasing the gripping force applied to the cylindrical layer by the first and second gripping members. method of fixing the layer to a fixed member. 2. The fixing member includes a wall against which the respective end surfaces of the first and second gripping members abut, and the pressing operation includes pressing the fixing collar against the wall. A method according to claim 1, characterized in: 3. The method according to claim 1, wherein the connecting operation includes fixing and fixing the fixing collar to a stud fastened to the wall. 4. Claims 1 to 3, characterized in that the cylindrical layer includes a plurality of armor wires spirally wound in a single layer around the elongated member. Any method described. 5. Claim 4, wherein the outer surface of the first gripping member includes a plurality of grooves having a spiral layout substantially equivalent to the spiral layout of the armor wire. The method described in. 6. Claim 4, characterized in that the outer surface of the first gripping member is provided with a helical thread groove into which the armor wire bites, thereby providing a gripping effect. The method described in. 7. The method according to claim 4, wherein the inner surface of the second gripping member is provided with a helical thread groove into which the armor wire bites, thereby providing a gripping effect. 8. The method of claim 1, wherein the cylindrical layer includes a plurality of armor wires helically wrapped around the elongate member in at least two layers. 9. Claim 9, characterized in that the outer surface of the first gripping member includes a plurality of grooves having a helical layout substantially equivalent to the helical layout of the innermost layer of the armor wire. The method described in Section 8. 10. Claim 8, characterized in that the outer surface of the first gripping member is provided with a spiral thread groove into which the innermost layer of the armor wire bites, thereby providing a gripping effect. Method described. 11. Claim 8, characterized in that the outermost layer of the armored wire bites into the inner surface of the second gripping member, thereby providing a spiral thread groove that provides a gripping effect. - The method according to any one of paragraphs 10 to 10. 12 such that the innermost layer of the armored wire provides a more sliding cylindrical surface relative to the outermost layer of the armored wire;
Claims further comprising the step of arranging a member having an appropriate cross-sectional shape in each of the outer spaces of the innermost layer of the armor wire in the vicinity of the first gripping member. The method described in Scope Item 8. 13. A step of arranging a multi-segmented support tube near the first gripping member between the innermost layer and the outermost layer of the armored wire to separate the armored wire layers by a predetermined space. 9. The method of claim 8, further comprising: 14 A fixing device for fixing a substantially cylindrical layer of an elongated member, the fixing device comprising: a wall of the fixing member; an annular first gripping member having a substantially cylindrical outer surface suitable for being disposed inside the cylindrical layer;
an annular body having a substantially cylindrical inner surface capable of fitting at least partially matingly with the gripping member of the gripping member, and having one end abutting the wall; Furthermore, the annular body has a tapered part formed on its outer surface such that the thickness decreases in the longitudinal direction of the cylindrical layer from the end adjacent to the wall part, and a second gripping member having a structure that is divided into a plurality of sections in the direction and movable in the radial direction with respect to the first gripping member; a cylindrical fastening collar suitable for being fastened to the wall for fastening a member and having a tapered portion on its inner surface that cooperates with a tapered portion adapted to the tapered portion of the second gripping member; The first and second gripping members and the fixing collar are configured to increase the gripping force applied to the cylindrical layer in response to an increase in the axial load applied to the elongated member. A fixing device for fixing a substantially cylindrical layer of an elongate member, characterized in that the fixing device cooperates with a substantially cylindrical layer of an elongated member. 15 an outer surface of the second gripping member slopes in a first direction away from the wall during operation of the fastening device; an inner surface of the fastening collar also slopes in the first direction; 15. Fixing device according to claim 14, characterized in that it cooperates directly with the outer surface of the second gripping member during operation. 16. An anchoring device according to claim 14, including a stud bolt tightened to the wall for securing and securing the anchoring collar. 17. For use with a cylindrical layer of armored wire helically wrapped around the elongate member, the outer surface of the first gripping member includes a plurality of grooves having a helical layout. An anchoring device according to scope 14. 18. The fixing device according to claim 14, wherein the outer surface of the first gripping member is provided with a helical thread groove that digs into the cylindrical layer during operation to provide a gripping effect. 19. A fixing device according to claim 14, wherein the inner surface of the second gripping member is provided with a helical thread groove that digs into the cylindrical layer during operation to provide a gripping effect. 20 Since the armored wire wound helically around the elongated member uses a cylindrical layer comprising at least two layers, the innermost layer of the armored wire is innermost than the adjacent outer layer of the armored wire. Claim 14 comprising a plurality of elements with suitable cross-sections suitable for being disposed within the outer interspace of the innermost layer of armor wire to provide a smoother cylindrical surface. Fixation device as described in. 21 In order to use a cylindrical layer in which the armor wire wound spirally around the elongated member constitutes at least two layers, the innermost layer of the armor wire and the adjacent outer layer are spaced at a predetermined interval. 15. The fixation device of claim 14, including a multi-segmented support tube adjusting the spacing between the layers.