Cleat, cable track, method for manufacturing a cable track, and method for installing a cable track

Abstract

Miniaturize the cleats. [Solution] The cleat comprises a lower gripping member on which a first power cable and a second power cable are placed, an intermediate gripping member that grips the first and second power cables between itself and the lower gripping member and on which a third power cable is placed vertically above, an upper gripping member that grips the third power cable between itself and the intermediate gripping member, and a pair of upper elastic mechanisms arranged on at least both sides of the third power cable and elastically connecting the lower gripping member and the upper gripping member, each of the pair of upper elastic mechanisms being configured as a cylindrical member having a bottom on the vertically downward side and configured to be connectable to the upper gripping member, an upper case provided vertically downward from the upper gripping member, an upper spring housed in the upper case and having a first end in contact with the bottom of the upper case and a second end opposite to the first end, and an upper locking member that locks the second end of the upper spring to the lower gripping member in a state not fixed to the upper case.

Description

Technical Field

[0001] The present disclosure relates to cleats, cable lines, a method for manufacturing cable lines, and a method for installing cable lines.

Background Art

[0002] Cleats may be provided to fix power cables laid in a tunnel (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present disclosure is to miniaturize the cleat.

Means for Solving the Problems

[0005] According to one aspect of the present disclosure, the device comprises: a lower gripping member on which a first power cable and a second power cable are placed; an intermediate gripping member that grips the first power cable and the second power cable between itself and the lower gripping member and on which a third power cable is placed vertically above it; an upper gripping member that grips the third power cable between itself and the intermediate gripping member; and a pair of upper elastic mechanisms arranged on at least both sides of the third power cable and elastically connecting the lower gripping member and the upper gripping member, wherein the A cleat is provided comprising: a pair of upper elastic mechanisms, each configured as a cylindrical member having a bottom on the vertically downward side and configured to be connectable to the upper gripping member; an upper case provided vertically downward from the upper gripping member; an upper spring housed within the upper case and having a first end in contact with the bottom of the upper case and a second end opposite to the first end; and an upper locking member that, in a state not fixed to the upper case, locks the second end of the upper spring to the lower gripping member. [Effects of the Invention]

[0006] According to this disclosure, cleats can be miniaturized. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is a schematic partial cross-sectional front view showing a cable line according to one embodiment of the present disclosure. [Figure 2] Figure 2 is a view taken along arrow AA in Figure 1. [Figure 3] Figure 3 is a view from the direction of arrow BB in Figure 1. [Figure 4] Figure 4 is an enlarged view of a portion of Figure 1. [Figure 5] Figure 5 is a flowchart showing a method for manufacturing a cable line according to one embodiment of the present disclosure. [Figure 6] Figure 6 shows the intermediate locking member arrangement process according to one embodiment of the present disclosure. [Figure 7] Figure 7 shows the intermediate locking member arrangement process according to Modification 1 of one embodiment of the present disclosure. [Figure 8] Figure 8 shows the intermediate locking member arrangement process according to Modification 2 of one embodiment of the present disclosure. [Figure 9] Figure 9 is a view along arrow AA relating to modification 3 of one embodiment of the present disclosure. [Figure 10] Figure 10 is a schematic partial cross-sectional front view showing a modified example of a cleat according to one embodiment of the present disclosure. [Modes for carrying out the invention]

[0008] [Description of Embodiments in this Disclosure] <Insights gained by the inventor> First, let me explain the findings of the inventor.

[0009] Ultra-high voltage power cables had a metal sheath, such as an aluminum corrugated tube, as a waterproofing structure. Power cables with a metal sheath do not change in outer diameter even when the temperature of the power cable rises during energization. Therefore, they were firmly fixed using cleats with bolts only, without the use of elastic mechanisms such as springs.

[0010] On the other hand, in power cables of lower voltage classes such as 66kV, metal sheathing was not used, and a metal laminate layer (metal laminate resin tape) was used as a simple waterproofing structure. In recent years, due to technological improvements, simple waterproofing structures with a metal laminate layer have been applied to ultra-high voltage power cables as well.

[0011] In power cables without a metal sheath, the cable expands when the temperature rises during energization, increasing its outer diameter. Therefore, to accommodate this expansion, the power cable was elastically fixed by a cleat having an elastic mechanism including a spring (for example, the aforementioned Patent Document 1).

[0012] However, when the inventors investigated cleats having an elastic mechanism including a spring, they found that the following new problems (i) to (iii) arise.

[0013] (i) The power cable without a metal sheath was required to replace the oil-filled cable (OF cable) housed in the trough. However, in the cleat for gripping the power cable without a metal sheath, an elastic mechanism including a spring protruded above the power cable. Therefore, it was difficult to house the power cable together with the cleat in the trough.

[0014] (ii) In the above-mentioned trough, a water-cooling pipe for flowing water to cool the power cable was provided above the cleat. However, when housing the power cable without a metal sheath in the trough, as described above, since the elastic mechanism including the spring protruded above the power cable, it was difficult to house the water-cooling pipe together with the cleat in the trough.

[0015] (iii) When restraining three power cables without a metal sheath together, the elastic mechanism including the spring became large. Therefore, the problems in (i) and (ii) occurred significantly. Furthermore, in this case, it was difficult to stably fix the power cables of each phase.

[0016] The following disclosure is based on the above findings discovered by the inventors.

[0017] <Embodiments of the present disclosure> Next, the embodiments of the present disclosure will be listed and described.

[0018] [1] The cleat according to one aspect of the present disclosure is a lower gripping member for placing the first power cable and the second power cable, an intermediate gripping member that grips the first power cable and the second power cable between the lower gripping member and itself, and places a third power cable vertically above, an upper gripping member that grips the third power cable between the intermediate gripping member and itself, A pair of upper elastic mechanisms are arranged on at least both sides of the third power cable and elastically connect the lower gripping member and the upper gripping member, Equipped with, Each of the pair of upper elastic mechanisms is It is configured as a cylindrical member having a bottom on the vertically downward side, and is configured to be connectable to the upper gripping member, and an upper case is provided extending vertically downward from the upper gripping member, An upper spring housed within the upper case, having a first end in contact with the bottom of the upper case and a second end opposite to the first end, An upper locking member that, in an unfixed state relative to the upper case, locks the second end of the upper spring to the lower gripping member, It holds. This configuration allows for a smaller cleat size.

[0019] [2] The cleats described in [1] above are At least one of the first power cable and the second power cable is positioned on either side of the first power cable, and at least one of the intermediate power cables is elastically connected to the lower gripping member and the intermediate gripping member, Equipped with, Each of the pair of intermediate elastic mechanisms is, It is configured as a cylindrical member having a bottom on the vertically downward side, and is configured to be connectable to the intermediate gripping member, and is provided vertically downward from the intermediate gripping member, A middle spring housed within the middle case, having a first end in contact with the bottom of the middle case and a second end opposite to the first end, A middle locking member that, in an unfixed state relative to the middle case, locks the second end of the middle spring to the lower gripping member, It holds. This configuration makes it possible to stably separate and grip at least one of the lower phase's first and second power cables and the upper phase's third power cable, while also miniaturizing the cleat.

[0020] [3] The cleats described in [2] above are A pair of first intermediate elastic mechanisms are configured as the aforementioned pair of intermediate elastic mechanisms, arranged on both sides of the first power cable, and elastically connect the lower gripping member and the intermediate gripping member, A pair of second intermediate elastic mechanisms are configured as the aforementioned pair of intermediate elastic mechanisms, arranged on both sides of the second power cable, and elastically connect the lower gripping member and the intermediate gripping member, It is equipped with. This configuration makes it possible to securely grip each of the three phase power cables individually while simultaneously miniaturizing the cleat.

[0021] [4] In the cleat described in [3] above, When viewed from above, The pair of upper elastic mechanisms are arranged diagonally with respect to the axial direction of the third power cable, with the third power cable in between. The pair of first intermediate elastic mechanisms are arranged in a direction intersecting the arrangement direction connecting the pair of upper elastic mechanisms, with the first power cable in between, and are arranged diagonally with respect to the axial direction of the first power cable. The pair of second intermediate elastic mechanisms are arranged in a direction intersecting the arrangement direction connecting the pair of upper elastic mechanisms, with the second power cable in between, and are arranged diagonally with respect to the axial direction of the second power cable. This configuration allows for miniaturization of the cleat, even if it is configured to individually and elastically grip the first, second, and third power cables.

[0022] [5] In the cleat described in [1] or [2] above, The lower gripping member has a slit into which the upper locking member can be inserted from the outside of the lower gripping member. With this configuration, the upper locking member can be easily hooked onto the slit from the outside of the lower gripping member.

[0023] [6] In the cleat described in [1] or [2] above, The upper locking member has an upper temporary fixing member that fixes the upper spring in a releaseable state when it is compressed. This configuration allows the upper locking member to be easily and stably positioned.

[0024] [7] In the cleat described in [6] above, Each of the pair of upper elastic mechanisms has an upper washer that contacts the first end of the upper spring, The bottom of the upper case has a through hole through which the upper temporary fixing member can pass but the upper washer cannot. The first end of the upper spring contacts the bottom of the upper case via the upper washer. This configuration allows the upper locking member to be easily and stably positioned.

[0025] [8] In the cleat described in [1] or [2] above, The upper locking member has a stud bolt that penetrates the bottom of the upper case, is inserted into the upper spring inside the upper case, and is fixed to the lower gripping member. This configuration allows for easy placement of the upper locking member even in confined workspaces.

[0026] [9] In the cleats described in [2] or [3] above, The lower gripping member has a slit into which the middle locking member can be inserted from the outside of the lower gripping member. With this configuration, the middle locking member can be easily hooked onto the slit from the outside of the lower gripping member.

[0027]

[10] In the cleat described in [2] or [3] above, The aforementioned intermediate locking member has an intermediate temporary fixing member that fixes the intermediate spring in a releaseable manner when the intermediate spring is compressed. This configuration allows for easy and stable placement of the intermediate locking member.

[0028]

[11] In the cleat described in

[10] above, Each of the pair of intermediate elastic mechanisms has an intermediate washer that contacts the first end of the intermediate spring, The bottom of the aforementioned middle case has a through hole through which the temporary fixing member of the middle section can pass, but the washer of the middle section cannot pass. The first end of the intermediate spring contacts the bottom of the intermediate case via the intermediate washer. This configuration allows for easy and stable placement of the intermediate locking member.

[0029]

[12] In the cleat described in [2] or [3] above, The intermediate locking member has a stud bolt that penetrates the bottom of the intermediate case, is inserted into the intermediate spring inside the intermediate case, and is fixed to the lower gripping member. This configuration allows for easy placement of the intermediate locking member even in confined workspaces.

[0030]

[13] In the cleat described in [3] above, The aforementioned intermediate gripping member is A first intermediate gripping member that grips the first power cable is located between the lower gripping member and itself, A second intermediate gripping member that grips the second power cable is located between the lower gripping member and itself, Includes, The first intermediate gripping member and the second intermediate gripping member are configured to be separable from each other. With this configuration, the first and second power cables can be gripped separately by the first and second intermediate gripping members, which are separated from each other.

[0031]

[14] In the cleats described in [1] or [2] above, Each of the first power cable, the second power cable, and the third power cable does not have a metal sheath. This configuration allows for an elastic gripping force to be applied to the power cable in order to follow the expansion of the power cable, which does not have a metal sheath.

[0032]

[15] Cable lines relating to further aspects of this disclosure are: [1] or [2] at least one cleat, A water cooling pipe for flowing water is provided at the top of the aforementioned cleat, A trough housing the cleat and the water cooling pipe, It is equipped with. This configuration makes it possible to manufacture cable lines stably.

[0033]

[16] A method for manufacturing a cable line according to yet another aspect of the present disclosure is: The steps of installing at least one cleat as described in [1] or [2], The steps include: arranging a water-cooling pipe for flowing water at the upper part of the aforementioned cleat; The steps include housing the cleat and the water cooling pipe inside the trough, It is equipped with. This configuration makes it possible to manufacture cable lines stably.

[0034]

[17] A method for installing cable lines according to yet another aspect of the present disclosure is: The steps of installing at least one cleat as described in [1] or [2], The steps include: arranging a water-cooling pipe for flowing water at the upper part of the aforementioned cleat; The steps include housing the cleat and the water cooling pipe inside the trough, It is equipped with. This configuration makes it possible to stably install the cable line 10.

[0035] [Details of the embodiments of this disclosure] Next, an embodiment of the present disclosure will be described below with reference to the drawings. However, the present disclosure is not limited to these examples, and is intended to include all modifications within the meaning and scope of the equivalents of the claims.

[0036] <One Embodiment of the Present Disclosure> (1) Outline configuration of the cable line A schematic configuration of the cable line 10 according to one embodiment of this disclosure will be described with reference to Figure 1.

[0037] In Figure 1, the trough 80, power cable 100, water cooling pipe 60, upper case 320 of the upper elastic mechanism 30, and middle case 420 of the middle elastic mechanism 40 are shown in cross-section. In Figure 1, the insides of the upper case 320 of the upper elastic mechanism 30 and the middle case 420 of the middle elastic mechanism 40 are shown. These illustrated configurations are the same in Figures 4, 6 to 8, and 10 described later. In Figure 1, the hatching of the power cable 100, water cooling pipe 60, and trough 80 has been omitted.

[0038] In the following, the "axial direction" of the power cable 100 refers to the direction along the central axis of the power cable 100, and can be rephrased as the longitudinal direction of the power cable 100. The same terminology as for the power cable 100 may also be used for other cylindrical and columnar members that constitute the cable line 10. The "arrangement direction" of the power cable 100 refers to the axial direction of the power cable 100 when the power cable 100 is arranged on the cleat 20.

[0039] As shown in Figure 1, the cable line 10 of this embodiment includes, for example, a three-phase power cable 100, at least one cleat 20, a water cooling pipe 60, and a trough 80.

[0040] (Power cable) The power cable 100 is configured as a solid-insulated cable, which is a high-voltage power transmission cable. The power cable 100 is configured as, for example, a CV cable (also known as a cross-linked polyethylene insulated vinyl sheath cable, or XLPE cable).

[0041] The power cable 100 is configured, for example, as an underground cable, and has a conductor, an internal semiconducting layer, a cable insulation layer, an external semiconducting layer, a cable metal shielding layer, a fastening tape layer, a metal laminate layer, and a cable sheath, in this order from the central axis of the conductor toward the outer circumference of the power cable 100.

[0042] In this embodiment, the power cable 100 does not have a metal sheath, for example. The aforementioned cable metal shielding layer is, for example, a layer of copper wire or copper tape. The metal laminate layer is, for example, made of a water-impermeable metal laminate resin tape. The cable sheath contains resin. The structure of the power cable 100 from the conductor to the cable sheath is integrated.

[0043] As shown in Figure 1, the power cable 100 is configured to be used for, for example, three-phase AC, that is, it has three phases. Hereinafter, of the three-phase power cable 100, the two lower phases will be referred to as the "first power cable 100a" and the "second power cable 100b," and the upper phase will be referred to as the "third power cable 100c."

[0044] (Cleat) The cleat 20 is configured to elastically grip, for example, a three-phase power cable 100. In this embodiment, the cleat 20 is made compact by having an upper elastic mechanism 30 and a middle elastic mechanism 40, which will be described later. Details of the cleat 20 will be described later.

[0045] Multiple cleats 20 are provided, for example, at predetermined intervals along the axial direction of the power cable 100. Each cleat 20 is fixed to the bottom surface of the trough 80.

[0046] (water cooled pipe) The water cooling pipes 60 are configured to carry water to cool, for example, the power cable 100. The water cooling pipes 60 are located on the upper part of the cleat 20. In this embodiment, for example, a pair of water cooling pipes 60 are provided on the upper parts of both sides of the cleat 20.

[0047] (trough) The trough 80 is provided, for example, within a tunnel. The trough 80 is configured to accommodate at least one of the cleats 20 and the water cooling pipe 60 described above. The trough 80 has a top cover (not shown) and is configured to be openable and closable.

[0048] In this embodiment, the trough 80 is, for example, one that previously housed OF cables. Even in such a case, in this embodiment, the cleat 20 is miniaturized as described later, so that the cleat 20 and the water cooling pipe 60 are stably housed within the trough 80.

[0049] (2) Cleats The cleat 20 of this embodiment will be described with reference to Figures 1 to 4.

[0050] As shown in Figure 1, the cleat 20 of this embodiment includes, for example, a lower gripping member 220, an intermediate gripping member 240, an upper gripping member 260, a pair of upper elastic mechanisms 30, and at least a pair of middle elastic mechanisms 40.

[0051] (2-1) Lower gripping member The lower gripping member 220 is configured to support, for example, the first power cable 100a and the second power cable 100b. Specifically, the lower gripping member 220 has, for example, two cylindrical recesses (not shown) vertically above it, having an inner diameter slightly larger than the outer diameter of the power cable 100. The first power cable 100a and the second power cable 100b are placed in the two recesses of the lower gripping member 220, respectively.

[0052] The lower gripping member 220 has slits 222a and 222b located outside, for example, the mounting locations for the first power cable 100a and the second power cable 100b. Slits 222a and 222b are provided from the first end of the lower gripping member 220 along the direction of arrangement of the power cables 100. Slits 222a and 222b are also provided at the second end of the lower gripping member 220 in the direction of arrangement of the power cables 100. Slits 222a and 222b are configured to allow insertion of the upper locking member 360 and the middle locking member 460 from the outside of the lower gripping member 220, respectively. As a result, as will be described later, the upper locking member 360 and the middle locking member 460 can be easily hooked onto the slits 222a and 222b, respectively, from the outside of the lower gripping member 220.

[0053] The lower gripping member 220 has, for example, a screw hole 224 between the mounting location for the first power cable 100a and the mounting location for the second power cable 100b. There are, for example, two screw holes 224. As will be described later, the intermediate locking member 460 of the first intermediate elastic mechanism 41 and the intermediate locking member 460 of the second intermediate elastic mechanism 42 are screwed into the two screw holes 224, respectively.

[0054] (2-2) Intermediate gripping member The intermediate gripping member 240 is configured to grip the first power cable 100a and the second power cable 100b between itself and the lower gripping member 220, for example. Specifically, the intermediate gripping member 240 has two recesses (not shown) vertically downward, corresponding to (opposing) the two recesses of the lower gripping member 220. The first power cable 100a and the second power cable 100b are gripped within the two recesses of the intermediate gripping member 240, respectively.

[0055] On the other hand, the intermediate gripping member 240 is configured, for example, to support the third power cable 100c on its vertically upper side. Specifically, the intermediate gripping member 240 has, for example, a cylindrical recess (not shown) having an inner diameter slightly larger than the outer diameter of the power cable 100, located vertically above the mounting location for the first power cable 100a and the mounting location for the second power cable 100b. The third power cable 100c is supported within the recess of the intermediate gripping member 240.

[0056] As shown in Figure 2, the intermediate gripping member 240 has, for example, a pair of notches 242. The pair of notches 242 are arranged diagonally, for example, on either side of the mounting location for the third power cable 100c. The pair of notches 242 prevent interference between the intermediate gripping member 240 and the pair of upper elastic mechanisms 30, which will be described later.

[0057] As shown in Figures 1 and 2, the intermediate gripping member 240 has, for example, a pair of through holes 244. The pair of through holes 244 are located, for example, near the center of the intermediate gripping member 240. The pair of through holes 244 allow the intermediate locking member 460 of the first intermediate elastic mechanism 41 and the intermediate locking member 460 of the second intermediate elastic mechanism 42, described later, to be adjusted (the intermediate nuts 466 are tightened) while the intermediate gripping member 240 is positioned on the first power cable 100a and the second power cable 100b.

[0058] (2-3) Upper gripping member The upper gripping member 260 is configured to grip the third power cable 100c between itself and the intermediate gripping member 240, for example. Specifically, the upper gripping member 260 has a recess (not shown) vertically downwards that corresponds to (opposes) a recess in the intermediate gripping member 240. The third power cable 100c is gripped within the recess of the upper gripping member 260.

[0059] As shown in Figure 3, the upper gripping member 260 has, for example, a pair of notches 262. The pair of notches 262 are arranged in a direction intersecting the direction connecting the pair of notches 242 of the intermediate gripping member 240. The pair of notches 262 prevent interference between the upper gripping member 260 and the pair of intermediate elastic mechanisms 40, which will be described later.

[0060] (2-4) Upper elastic mechanism As shown in Figures 1 to 4, the pair of upper elastic mechanisms 30 are arranged, for example, on both sides of the third power cable 100c and are configured to elastically connect the lower gripping member 220 and the upper gripping member 260. The pair of upper elastic mechanisms 30 can elastically apply a gripping force to at least the third power cable 100c.

[0061] As shown in Figures 1 and 4, specifically, the pair of upper elastic mechanisms 30 include, for example, an upper case 320, an upper spring 340, and an upper locking member 360.

[0062] (Upper case) The upper case 320 is configured, for example, as a cylindrical member having a bottom 322 on its vertically downward side. The upper case 320 is configured, for example, in a cylindrical shape. The upper case 320 does not have to have an opening in its outer peripheral wall, or it may have an opening in its outer peripheral wall.

[0063] The upper case 320 is configured to penetrate the upper gripping member 260 and be connectable to the upper gripping member 260, for example. The manner in which the upper case 320 is connected to the upper gripping member 260 is not limited. For example, the upper case 320 may be welded to the upper gripping member 260. Alternatively, for example, the upper case 320 may be screw-fastened to the upper gripping member 260 (the upper case 320 itself may be screwed into the upper gripping member 260). Alternatively, for example, the upper case 320 may be fastened to the upper gripping member 260 with bolts. Alternatively, for example, the upper case 320 may be gripped by a clamp (a so-called quick coupling clamp) provided on the upper gripping member 260. Alternatively, for example, the upper case 320 may be crimped to the upper gripping member 260.

[0064] The upper case 320 is provided, for example, extending vertically downward from the upper gripping member 260. This prevents the upper elastic mechanism 30 from protruding above the power cable 100.

[0065] (Upper spring) The upper spring 340 is configured, for example, as a coil spring and is housed within the upper case 320. The upper spring 340 has, for example, a first end (not shown) and a second end (not shown) opposite the first end. The first end of the upper spring 340 abuts against the bottom 322 of the upper case 320.

[0066] (Upper locking member) The upper locking member 360 is configured, for example, to lock the second end of the upper spring 340 to the lower gripping member 220 while being not fixed to the upper case 320.

[0067] Specifically, the upper locking member 360 includes, for example, an upper bolt 361, an upper nut 364, and an upper temporary fixing member 368.

[0068] The upper bolt 361 has, for example, a head 362 and a threaded portion 363. The head 362 is fixed to the lower gripping member 220. The threaded portion 363 passes through the bottom 322 of the upper case 320 and is inserted into the upper spring 340 inside the upper case 320. The head 362 is configured to catch on the slit 222a of the lower gripping member 220 when the threaded portion 363 is inserted into the slit 222a of the lower gripping member 220.

[0069] The upper nut 364 is screwed onto the threaded portion 363 of the upper bolt 361, for example, on the vertically upper side of the upper spring 340. The upper nut 364 is not fixed to the upper case 320, and locks the second end of the upper spring 340. A washer (not shown) may be interposed between the upper nut 364 and the second end of the upper spring 340.

[0070] The upper locking member 360 may further include, for example, an upper temporary fixing member 368. The upper temporary fixing member 368 is used in the manufacturing process of the cable line 10, as will be described later. The upper temporary fixing member 368 is configured, for example, to releasably fix the upper spring 340 in a compressed state. Specifically, the upper temporary fixing member 368 in this embodiment is configured, for example, as a nut and is movably screwed onto the threaded portion 363 of the upper bolt 361 between the lower gripping member 220 and the bottom 322 of the upper case 320. As a result, the upper temporary fixing member 368 can releasably fix the bottom 322 of the upper case 320 in a compressed state. Consequently, the upper locking member 360 can be easily positioned relative to the lower gripping member 220, as in the manufacturing method described later.

[0071] (Operation of the upper elastic mechanism) Referring to Figures 1 and 4, the operation of the upper elastic mechanism 30 when the third power cable 100c, which does not have a metal sheath, expands will be described.

[0072] When the temperature of the third power cable 100c rises when power is applied, the third power cable 100c expands, and its outer diameter increases. When the outer diameter of the third power cable 100c increases, the third power cable 100c pushes up the upper gripping member 260.

[0073] As the upper gripping member 260 is pushed up, the bottom 322 of the upper case 320 of the upper elastic mechanism 30 connected to the upper gripping member 260 is pushed up. At this time, while the bottom 322 of the upper case 320 is pushed up, the upper locking member 360, in an unfixed state relative to the upper case 320, locks the second end of the upper spring 340 to the lower gripping member 220. As a result, the upper spring 340 is compressed.

[0074] When the upper spring 340 is compressed, an elastic downward force is applied to the bottom 322 of the upper case 320. As a result, the upper gripping member 260 to which the upper case 320 is connected is elastically pushed down. Consequently, an elastic gripping force can be applied from the upper gripping member 260 to the third power cable 100c in order to follow the expansion of the third power cable 100c.

[0075] (2-5) Intermediate elastic mechanism As shown in Figures 1 and 2, at least one pair of intermediate elastic mechanisms 40 are arranged on either side of, for example, at least one of the first power cable 100a and the second power cable 100b, and are configured to elastically connect the lower gripping member 220 and the intermediate gripping member 240.

[0076] In this embodiment, the cleat 20 includes, for example, a pair of first intermediate elastic mechanisms 41 and a pair of second intermediate elastic mechanisms 42 to individually apply elastic gripping force to the lower phase first power cable 100a and the second power cable 100b, respectively.

[0077] The pair of first intermediate elastic mechanisms 41 are configured, for example, as a pair of intermediate elastic mechanisms 40, and are arranged on both sides of the first power cable 100a, and are configured to elastically connect the lower gripping member 220 and the intermediate gripping member 240. The pair of first intermediate elastic mechanisms 41 can elastically apply a gripping force to the first power cable 100a.

[0078] The pair of second intermediate elastic mechanisms 42 are configured, for example, as a pair of intermediate elastic mechanisms 40, and are arranged on both sides of the second power cable 100b, and are configured to elastically connect the lower gripping member 220 and the intermediate gripping member 240. The pair of second intermediate elastic mechanisms 42 can elastically apply a gripping force to the second power cable 100b.

[0079] The first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42 are basically configured in the same way as the upper elastic mechanism 30, except that the objects to be gripped are the first power cable 100a and the second power cable 100b, respectively, and the intermediate case 420 is configured to be connectable to the intermediate gripping member 240.

[0080] Specifically, the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42 each include, for example, an intermediate case 420, an intermediate spring 440, and an intermediate locking member 460. The intermediate case 420 is configured as a cylindrical member having a bottom 422 on its vertically downward side, is configured to be connectable to the intermediate gripping member 240, and is provided extending vertically downward from the intermediate gripping member 240. The intermediate spring 440 is housed within the intermediate case 420 and has a first end that abuts against the bottom 422 of the intermediate case 420, and a second end opposite to the first end. The intermediate locking member 460 is configured to lock the second end of the intermediate spring 440 to the lower gripping member 220 in a state that is not fixed to the intermediate case 420.

[0081] With this configuration, the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42 can be operated in the same way as the upper elastic mechanism 30.

[0082] On the other hand, each of the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42 may have different intermediate locking members 460 depending on their arrangement in the cleat 20.

[0083] In the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42, the intermediate locking members 460, which are located on the outside of the first power cable 100a and the second power cable 100b respectively, may be configured, for example, in the same way as the upper locking member 360 of the upper elastic mechanism 30.

[0084] Specifically, the intermediate locking member 460 has an intermediate bolt 461, an intermediate nut 464, and an intermediate temporary fixing member 468, similar to the upper locking member 360, for example, the upper bolt 361, upper nut 364, and upper temporary fixing member 368. The head 462 of the intermediate bolt 461 is configured to catch on the slit 222b of the lower gripping member 220.

[0085] This configuration of the middle locking member 460 allows for the same effect as the upper locking member 360 to be achieved.

[0086] On the other hand, in the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42, the intermediate locking member 460 positioned between the first power cable 100a and the second power cable 100b includes, for example, a stud bolt 465 and an intermediate nut 466. The stud bolt 465 passes through, for example, the bottom 422 of the intermediate case 420 and is inserted through the intermediate spring 440 inside the intermediate case 420. The stud bolt 465 is screwed into, for example, a screw hole 224 of the lower gripping member 220 and fixed to the lower gripping member 220. The intermediate nut 466 is screwed into, for example, the stud bolt 465 and locks the second end of the intermediate spring 440 in a state that is not fixed to the intermediate case 420.

[0087] With this configuration of the intermediate locking member 460, it can be easily positioned even in the narrow working space between the first power cable 100a and the second power cable 100b. As a result, the intermediate locking member 460 can provide the same effect as the upper locking member 360.

[0088] (2-6) Arrangement of the upper elastic mechanism, the first intermediate elastic mechanism, and the second intermediate elastic mechanism Referring to Figures 1 to 3, the arrangement of the upper elastic mechanism 30, the first intermediate elastic mechanism 41, and the second intermediate elastic mechanism 42 as viewed from the vertically upward side will be explained.

[0089] As shown in Figures 1 to 3, for example, the pair of upper elastic mechanisms 30 are arranged diagonally with respect to the axial direction of the third power cable 100c, with the third power cable 100c in between.

[0090] The pair of first intermediate elastic mechanisms 41 are arranged, for example, in a direction intersecting the arrangement direction connecting the pair of upper elastic mechanisms 30 with the first power cable 100a in between, and are also arranged diagonally with respect to the axial direction of the first power cable 100a.

[0091] The pair of second intermediate elastic mechanisms 42 are arranged, for example, in a direction intersecting the arrangement direction connecting the pair of upper elastic mechanisms 30 with the second power cable 100b in between, and are also arranged diagonally with respect to the axial direction of the second power cable 100b.

[0092] With the above arrangement, even if the cleat 20 is configured to individually and elastically grip the first power cable 100a, the second power cable 100b, and the third power cable 100c, it is possible to miniaturize the cleat 20 without having the upper elastic mechanism 30, the first intermediate elastic mechanism 41, and the second intermediate elastic mechanism 42 protrude above the power cable 100.

[0093] (3) Method for manufacturing cable lines and method for installing cable lines Next, with reference to Figures 1 to 6, the method for manufacturing the cable line 10 according to this embodiment will be described. The method for manufacturing the cable line 10 can also be considered as the method for installing the cable line 10. Figure 6 is a view from a direction perpendicular to the arrangement direction of the power cable 100. In Figure 6, the size of the intermediate locking member 460 is different from that in Figure 1 in order to clearly show the configuration of the intermediate locking member 460.

[0094] As shown in Figure 5, the method for manufacturing the cable line 10 of this embodiment includes, for example, a cleat installation step S100, a water-cooled pipe arrangement step S200, and a trough housing step S300.

[0095] (S100: Cleat installation process) First, install at least one cleat 20 within the trough 80.

[0096] The cleat installation process S100 includes, for example, a lower phase mounting process S110, a middle phase connecting process S120, an upper phase mounting process S130, and an upper phase connecting process S140.

[0097] (S110: Lower phase mounting process) The lower gripping member 220 is placed inside the trough 80, and the first power cable and the second power cable are placed on the lower gripping member 220.

[0098] (S120: Middle stage connection process) Once the lower phase mounting process S110 is completed, a pair of first intermediate elastic mechanisms 41 are positioned on both sides of the first power cable 100a, and a pair of second intermediate elastic mechanisms 42 are positioned on both sides of the second power cable 100b. With these positions, the lower gripping member 220 and the intermediate gripping member 240 are elastically connected by the pair of first intermediate elastic mechanisms 41 and the pair of second intermediate elastic mechanisms 42. As a result, the first power cable 100a and the second power cable 100b are gripped by the intermediate gripping member 240 between the lower gripping member 220 and the intermediate gripping member 240.

[0099] Specifically, the intermediate connection process S120 includes, for example, an intermediate case preparation process S122, an intermediate spring placement process S124, and an intermediate locking member placement process S126.

[0100] (S122: Middle case preparation process) Prepare the intermediate case 420. Next, in this embodiment, connect the intermediate case 420 to the intermediate gripping member 240 so that it is positioned vertically downward from the intermediate gripping member 240. The intermediate case 420 may be welded to the intermediate gripping member 240 in advance. In this state, position the intermediate gripping member 240 on the first power cable 100a and the second power cable 100b.

[0101] (S124: Middle spring placement process) Once the middle case preparation process S122 is complete, the middle spring 440 is placed inside the middle case 420, and the first end of the middle spring 440 is brought into contact with the bottom 422 of the middle case 420.

[0102] (S126: Intermediate locking member placement process) Once the intermediate spring placement process S124 is completed, the intermediate locking member 460 is left unfixed to the intermediate case 420, and the intermediate locking member 460 is used to lock the second end of the intermediate spring 440 to the lower gripping member 220.

[0103] In this case, the intermediate locking members 460, which are positioned on the outside of the first power cable 100a and the second power cable 100b respectively in the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42, are positioned, for example, by the following procedure.

[0104] First, in each of the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42, which are located on the outside of the first power cable 100a and the second power cable 100b respectively, before fixing the intermediate locking member 460 to the lower gripping member 220, the intermediate temporary fixing member 468 is screwed onto the threaded portion 463 of the intermediate bolt 461 and moved to the vicinity of the head 462 of the intermediate bolt 461. In this state, the threaded portion 463 of the intermediate bolt 461 is passed through the bottom 422 of the intermediate case 420 and inserted into the intermediate spring 440 inside the intermediate case 420. Next, the intermediate nut 464 is screwed onto the threaded portion 463 of the intermediate bolt 461 to a position where a predetermined elastic force is generated in the intermediate spring 440, vertically above the intermediate spring 440.

[0105] Next, as shown in Figure 6(a), in the intermediate locking members 460 of the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42, the intermediate temporary fixing member 468, which is screwed onto the threaded portion 463 of the intermediate bolt 461, is moved from the head 462 of the intermediate bolt 461 to the bottom 422 of the intermediate case 420. In this way, the intermediate temporary fixing member 468 temporarily fixes the bottom 422 of the intermediate case 420 with the intermediate spring 440 compressed. This widens the gap from the head 462 of the intermediate bolt 461 to the bottom 422 of the intermediate case 420.

[0106] Next, the intermediate gripping member 240 is slid in the axial direction of the power cable 100, and the threaded portion 463 of the intermediate bolt 461 of the intermediate locking member 460 is inserted into the slit 222b of the lower gripping member 220, and the head 462 of the intermediate bolt 461 is hooked into the slit 222b. Not only with the intermediate locking member 460 of the first intermediate elastic mechanism 41, but also with the intermediate locking member 460 of the second intermediate elastic mechanism 42, which is opposite to the first intermediate elastic mechanism 41, the head 462 of the intermediate bolt 461 is hooked into the slit 222b of the lower gripping member 220.

[0107] Subsequently, as shown in Figure 6(b), the intermediate temporary fixing members 468 are released at the intermediate locking members 460 of the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42, and the intermediate temporary fixing members 468 are moved from the bottom 422 of the intermediate case 420 to the lower gripping member 220. Releasing the intermediate temporary fixing members 468 engages the intermediate spring 440, elastically pushing down the bottom 422 of the intermediate case 420. This elastically pushes down the intermediate gripping member 240 toward the lower gripping member 220. As a result, the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42 can elastically apply gripping force to the first power cable 100a and the second power cable 100b, respectively.

[0108] Here, we will describe the case where the lower gripping member 220 has a through hole instead of a slit 222b, and there is no intermediate temporary fixing member 468. In this case, after passing the intermediate bolt 461 through the through hole in the lower gripping member 220, it is necessary to tighten the intermediate nut 464 onto the intermediate bolt 461 while pressing down on the intermediate spring 440. Tightening the intermediate nut 464 requires a greater force than loosening it. Furthermore, in this case, the work must be performed in the narrow space of the trough 80 at the site, resulting in poor workability. If a large force is applied to the intermediate nut 464 under such poor workability conditions, there is a risk that the threads of the intermediate nut 464 will seize up. As a result, in this case, it becomes difficult to stably position the intermediate locking member 460.

[0109] Furthermore, in this case, since the intermediate spring 440 is compressed from a free state to a state where the desired elastic force is obtained, it is necessary to make the intermediate bolt 461 longer beforehand. As a result, dead space is likely to occur within the trough 80, which may make it difficult to position the water cooling pipe 60.

[0110] In contrast, in this embodiment, by using the intermediate temporary fixing member 468 with a slit 222b provided in the lower gripping member 220, the intermediate spring 440 can be activated by only a small force to loosen the intermediate temporary fixing member 468, even in the narrow space of the trough 80 at the site. This makes it possible to easily and stably position the intermediate locking member 460.

[0111] Furthermore, in this embodiment, there is no need to make the intermediate bolt 461 excessively long. This prevents the creation of dead space within the trough 80, and allows for easy placement of the water cooling pipe 60.

[0112] On the other hand, in the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42, the intermediate locking member 460, which is positioned between the first power cable 100a and the second power cable 100b, has an even narrower working space, so it is positioned, for example, by the following procedure. Note that the following procedure is performed, for example, after the intermediate locking members 460, which are positioned on the outside of the first power cable 100a and the second power cable 100b respectively, have been positioned by the procedure described above.

[0113] In the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42, which are positioned between the first power cable 100a and the second power cable 100b, a stud bolt 465 is inserted from the vertical upper side of the intermediate gripping member 240 through the through hole 244 into the intermediate spring 440 inside the intermediate case 420, and through the bottom 422 of the intermediate case 420. Once the stud bolt 465 has passed through the bottom 422, the stud bolt 465 is screwed into the screw hole 224 of the lower gripping member 220 and fixed to the lower gripping member 220. After the stud bolt 465 is fixed, an intermediate nut 466 is screwed onto the stud bolt 465 on the vertical upper side of the intermediate spring 440. This locks the second end of the intermediate spring 440 with the intermediate nut 466, while the intermediate nut 466 is not fixed to the intermediate case 420. As a result, the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42, positioned between the first power cable 100a and the second power cable 100b, can also elastically apply gripping force to the first power cable 100a and the second power cable 100b, respectively.

[0114] (S130: Upper phase mounting process) Once the intermediate connection process S120 is completed, the third power cable 100c is placed on the vertically upper side of the intermediate gripping member 240.

[0115] (S140: Upper stage connection process) Once the upper mounting process S130 is completed, with at least a pair of upper elastic mechanisms 30 positioned on both sides of the third power cable 100c, the lower gripping member 220 and the upper gripping member 260 are elastically connected by the pair of upper elastic mechanisms 30. As a result, the third power cable 100c is gripped by the upper gripping member 260 between the intermediate gripping member 240 and the upper gripping member 260.

[0116] Specifically, the upper stage connection process S140 includes, for example, an upper stage case preparation process S142, an upper stage spring placement process S144, and an upper stage locking member placement process S146.

[0117] The upper case preparation step S142, the upper spring placement step S144, and the upper locking member placement step S146 are carried out in the same manner as the middle case preparation step S122, the middle spring placement step S124, and the middle locking member placement step S126, respectively, except that the object to be gripped is the third power cable 100c and the upper case 320 is configured to be connectable to the upper gripping member 260.

[0118] The upper locking member placement step S146 is carried out in the same manner as the middle locking member placement step S126 shown in Figure 6, except that the upper case 320 is configured to be connectable to the upper gripping member 260.

[0119] (S200: Water cooling pipe arrangement process) Once the cleat installation process S100 is complete, the water cooling pipe 60 is placed on top of the cleat 20.

[0120] (S300: Trough containment process) Once the water cooling pipe placement process S200 is complete, the top cover of the trough 80 is closed, and the three-phase power cable 100, at least one cleat 20, and the water cooling pipe 60 are housed inside the trough 80.

[0121] Based on the above, the cable line 10 of this embodiment is manufactured.

[0122] (4) Summary of this embodiment This embodiment provides one or more of the following effects.

[0123] (a) In this embodiment, in each of the pair of upper elastic mechanisms 30, the upper case 320 is configured as a cylindrical member having a bottom 322 on its vertically downward side, is configured to be connectable to the upper gripping member 260, and is provided extending vertically downward from the upper gripping member 260. The upper spring 340 is housed within the upper case 320. The upper locking member 360 is configured to lock the second end of the upper spring 340 to the lower gripping member 220 in a state that is not fixed to the upper case 320. With this pair of upper elastic mechanisms 30, it is possible to apply an elastic gripping force to at least the third power cable 100c while preventing the pair of upper elastic mechanisms 30 from protruding above the power cable 100. As a result, it is possible to miniaturize the cleat 20.

[0124] By miniaturizing the cleat 20, the three-phase power cable 100 can be stably housed within the trough 80 together with the cleat 20. Furthermore, the water-cooling pipe 60 can be housed within the trough 80 while the three-phase power cable 100 is held in place by the cleat 20. As a result, the cable line 10 can be manufactured (installed) stably.

[0125] By using the cleat 20 of this embodiment, for example, a power cable 100 without a metal sheath can be easily replaced with an existing OF cable housed in a trough 80.

[0126] (b) In this embodiment, at least one pair of intermediate elastic mechanisms 40 are further provided. The intermediate elastic mechanism 40 is basically configured the same as the upper elastic mechanism 30, except that the object to be gripped is at least one of the first power cable 100a and the second power cable 100b, and the intermediate case 420 is configured to be connectable to the intermediate gripping member 240. With at least one pair of such intermediate elastic mechanisms 40, it is possible to apply an elastic gripping force to at least one of the first power cable 100a and the second power cable 100b while preventing the pair of intermediate elastic mechanisms 40 from protruding above the power cable 100. As a result, it is possible to stably grip at least one of the lower phase first power cable 100a and the second power cable 100b and the upper phase third power cable 100c separately, and to reduce the size of the cleat 20.

[0127] (c) In this embodiment, the cleat 20 is configured to grip the lower phase first power cable 100a and the second power cable 100b separately. That is, the pair of first intermediate elastic mechanisms 41 are configured as a pair of intermediate elastic mechanisms 40, and are arranged on both sides of the first power cable 100a, and are configured to elastically connect the lower gripping member 220 and the intermediate gripping member 240. The pair of second intermediate elastic mechanisms 42 are configured as a pair of intermediate elastic mechanisms 40, and are arranged on both sides of the second power cable 100b, and are configured to elastically connect the lower gripping member 220 and the intermediate gripping member 240. With such a pair of first intermediate elastic mechanisms 41 and a pair of second intermediate elastic mechanisms 42, it is possible to individually apply elastic gripping force to the first power cable 100a and the second power cable 100b, respectively, while preventing the pair of first intermediate elastic mechanisms 41 and the pair of second intermediate elastic mechanisms 42 from protruding above the power cable 100. As a result, it becomes possible to achieve both the stable individual gripping of each of the three phase power cables 100 and the miniaturization of the cleat 20.

[0128] (5) Modified example of one embodiment The embodiments described above can be modified as necessary, as shown in the following examples. Below, only elements that differ from the embodiments described above will be described, and elements that are substantially the same as those described in the embodiments above will be denoted by the same reference numerals and their descriptions will be omitted.

[0129] (Variation 1) Modification 1 differs from the above-described embodiment in the following respects. • The manner in which the middle case 420 is connected to the intermediate gripping member 240. • Placement process of the middle locking member S126 • The connection method of the upper case 320 to the upper gripping member 260 • Upper locking member placement process S146

[0130] (S122: Middle case preparation process) Prepare the intermediate case 420 of Modification 1. In Modification 1, the intermediate case 420 is configured to be gripped by a clamp 246 provided on the intermediate gripping member 240. This connection method may also be bolted instead of using the clamp 246 described above.

[0131] (S126: Intermediate locking member placement process) Next, the intermediate locking member placement step S126 of the modified example 1 will be described. In modified example 1, the step of connecting the intermediate case 420 to the intermediate gripping member 240 and the intermediate locking member placement step S126 are performed together.

[0132] First, as shown in Figure 7(a), in the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42, which are located on the outside of the first power cable 100a and the second power cable 100b respectively, the intermediate temporary fixing member 468 is screwed onto the threaded portion 463 of the intermediate bolt 461. In this state, the threaded portion 463 of the intermediate bolt 461 is passed through the bottom 422 of the intermediate case 420 and inserted into the intermediate spring 440 inside the intermediate case 420. Next, the intermediate nut 464 is screwed onto the threaded portion 463 of the intermediate bolt 461 on the vertically upper side of the intermediate spring 440. Furthermore, the intermediate temporary fixing member 468 is moved to the bottom 422 of the intermediate case 420.

[0133] At this time, the intermediate nut 464 and the intermediate temporary fixing member 468 are adjusted so that the length of the intermediate spring 440 becomes a predetermined set length. The "set length of the intermediate spring 440" here refers to the length of the intermediate spring 440 that, when the cleat 20 is completed, is set so that the intermediate spring 440 in the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42 provides a desired elastic gripping force to the first power cable 100a and the second power cable 100b, respectively.

[0134] Next, the intermediate gripping member 240 is slid in the axial direction of the power cable 100, and the head 462 of the intermediate bolt 461 is hooked into the slit 222b. At the same time, the intermediate case 420 is positioned so as to be in contact with the intermediate gripping member 240.

[0135] Next, as shown in Figure 7(b), the middle case 420 is gripped by a clamp 246 provided on the intermediate gripping member 240. This connects the middle case 420 to the intermediate gripping member 240, and positions it so that it is positioned vertically downward from the intermediate gripping member 240.

[0136] Once the middle case 420 is connected to the intermediate gripping member 240, the temporary fixing member 468 is released, as shown in Figure 7(b), and the temporary fixing member 468 is moved from the bottom 422 of the middle case 420 to the lower gripping member 220. Releasing the temporary fixing member 468 activates the middle spring 440, which elastically pushes down the bottom 422 of the middle case 420.

[0137] (S146: Upper locking member placement process) In Modification 1, the upper case 320 is also configured to be gripped by a clamp (not shown) provided on the upper gripping member 260. The upper locking member placement step S146 in Modification 1 is carried out in the same manner as the middle locking member placement step S126 described above, except that the object to be gripped is the third power cable 100c and the upper case 320 is configured to be connectable to the upper gripping member 260.

[0138] (Summary of Variation 1) According to Modification 1, the intermediate nut 464 and the intermediate temporary fixing member 468 are pre-adjusted so that the length of the intermediate spring 440 becomes a predetermined set length. This allows the intermediate temporary fixing member 468 to be easily released. As a result, the intermediate locking member 460 can be easily and stably positioned.

[0139] (Modification 2) Modification 2 differs from the above-described embodiment in the following respects. • Middle washer 450 • Middle shelf case 420 • Middle locking member 460 ·Middle stage connection process S120 • Upper washer (not shown) • Upper case 320 • Upper locking member 360 ·Upper connection process S140

[0140] (S120: Middle stage connection process) The intermediate connection step S120 in the modified example 2 includes, for example, an intermediate case preparation step S122, an intermediate locking member preparation step S123, an intermediate locking member insertion step S125, and an intermediate locking member placement step S126.

[0141] (S122: Middle case preparation process) As shown in Figure 8(a), the middle case 420 is prepared. In the modified example 2, the middle case 420 is connected to the intermediate gripping member 240 in advance and positioned vertically downward from the intermediate gripping member 240.

[0142] The bottom 422 of the middle case 420 has a through hole 423 through which, for example, the temporary fixing member 468 of the middle section can pass, but the washer 450 of the middle section cannot.

[0143] (S123: Preparation process for the middle locking member) Once the intermediate case preparation process S122 is completed, the intermediate spring 440, intermediate locking member 460, and intermediate washer 450 are prepared as shown in Figure 8(a). The intermediate locking member 460 includes an intermediate nut 464, a stud bolt 465, and an intermediate temporary fixing member 468.

[0144] Once these preparations are complete, the stud bolts 465 of the intermediate locking member 460 are inserted through the intermediate spring 440 and the intermediate washer 450, and the intermediate washer 450 is positioned to contact the first end of the intermediate spring 440.

[0145] Next, the middle nut 464 is screwed onto the stud bolt 465 on the vertically upper side of the middle spring 440. Furthermore, the temporary middle fixing member 468 is screwed onto the stud bolt 465 on the vertically lower side of the middle spring 440, and the temporary middle fixing member 468 is moved up to the middle washer 450. This fixes the middle spring 440 in a releasable position in a compressed state using the temporary middle fixing member 468.

[0146] At this time, the intermediate nut 464 and the intermediate temporary fixing member 468 are adjusted so that the length of the intermediate spring 440 becomes a predetermined set length.

[0147] (S125: Insertion process of the middle locking member) Once the adjustment of the intermediate nut 464 and the intermediate temporary fixing member 468 is complete, as shown in Figure 8(a), the intermediate locking member 460, which is formed by connecting the intermediate nut 464, intermediate spring 440, intermediate washer 450, and intermediate temporary fixing member 468 in this order in the axial direction of the stud bolt 465, is inserted into the intermediate case 420.

[0148] As a result, as shown in Figure 8(b), the first end of the intermediate spring 440 housed in the intermediate case 420 is brought into contact with the bottom 422 of the intermediate case 420 via the intermediate washer 450.

[0149] At this time, the temporary fixing member 468 passes through the through hole 423 in the bottom 422 of the middle case 420, but the middle washer 450 does not. Therefore, the temporary fixing member 468 protrudes vertically downward from the through hole 423. On the other hand, the middle washer 450 is locked to the bottom 422 of the middle case 420.

[0150] Furthermore, at this time, since the length of the middle spring 440 is adjusted in advance to a predetermined set length, the stud bolt 465 protrudes vertically downward from the slit 222b of the lower gripping member 220.

[0151] (S126: Intermediate locking member placement process) Once the intermediate locking member insertion process S125 is completed, as shown in Figure 8(b), the intermediate lower nut 467 is screwed onto the stud bolt 465 that protrudes vertically downward from the slit 222b of the lower gripping member 220. This fixes the stud bolt 465 of the intermediate locking member 460 to the lower gripping member 220.

[0152] Once the stud bolt 465 is fixed to the lower gripping member 220, the intermediate temporary fixing member 468 is released as shown in Figure 8(c), and the intermediate temporary fixing member 468 is moved from the bottom 422 of the intermediate case 420 to the lower gripping member 220. This causes the second end of the intermediate spring 440 to be locked to the lower gripping member 220 by the intermediate locking member 460 while it is not fixed to the intermediate case 420. As a result, the intermediate spring 440 can be activated.

[0153] The above intermediate connection step S120 may be applied not only to the intermediate locking members 460 located on the outside of the first power cable 100a and the second power cable 100b in the first intermediate elastic mechanism 41 and the second intermediate elastic mechanism 42, but also to the intermediate locking member 460 located between the first power cable 100a and the second power cable 100b.

[0154] (S140: Upper stage connection process) The upper connecting step S140 of the modified example 2 includes, for example, an upper case preparation step S142, an upper locking member preparation step S143, an upper locking member insertion step S145, and an upper locking member placement step S146.

[0155] The upper case preparation step S142, the upper locking member preparation step S143, the upper locking member insertion step S145, and the upper locking member placement step S146 are carried out in the same manner as the middle case preparation step S122, the middle locking member preparation step S123, the middle locking member insertion step S125, and the middle locking member placement step S126, respectively, except that the object to be gripped is the third power cable 100c and the upper case 320 is configured to be connectable to the upper gripping member 260.

[0156] (Summary of Variation 2) According to Modification 2, even within the narrow space of the trough 80 at the site, the intermediate spring 440 can be activated by only a small force to loosen the intermediate temporary fixing member 468. This allows the intermediate locking member 460 to be easily and stably positioned.

[0157] Furthermore, the upper locking member 360 of the modified example 2 can be easily and stably positioned using the same principle as the middle locking member 460 of the modified example 2.

[0158] In the above-described modification 2, the case in which the lower gripping member 220 has a slit 222b was explained, but the lower gripping member 220 may have a through hole or a screw hole instead of a slit 222b.

[0159] (Variation 3) In the third modified example, the intermediate gripping member 240 differs from that of the embodiment described above.

[0160] (Intermediate gripping member) As shown in Figure 9, the intermediate gripping member 240 of the modified example 3 includes, for example, a first intermediate gripping member 240a and a second intermediate gripping member 240b.

[0161] The first intermediate gripping member 240a is configured to grip the first power cable 100a between itself and the lower gripping member 220, for example. The first intermediate gripping member 240a is provided with a pair of first intermediate elastic mechanisms 41 that are elastically connected to the lower gripping member 220.

[0162] On the other hand, the second intermediate gripping member 240b is configured to grip the second power cable 100b between itself and the lower gripping member 220, for example. The second intermediate gripping member 240b is provided with a pair of second intermediate elastic mechanisms 42 so as to be elastically connected to the lower gripping member 220.

[0163] The first intermediate gripping member 240a and the second intermediate gripping member 240b are configured to be separable from each other.

[0164] (S120: Middle stage connection process) In the intermediate connection step S120 of the modified example 3, the first intermediate gripping member 240a and the second intermediate gripping member 240b are installed separately.

[0165] For example, first, with a pair of first intermediate elastic mechanisms 41 positioned on both sides of the first power cable 100a, the lower gripping member 220 and the first intermediate gripping member 240a are elastically connected by the pair of first intermediate elastic mechanisms 41. Next, with a pair of second intermediate elastic mechanisms 42 positioned on both sides of the second power cable 100b, the lower gripping member 220 and the second intermediate gripping member 240b are elastically connected by the pair of second intermediate elastic mechanisms 42.

[0166] Conversely, the connection of the pair of second intermediate elastic mechanisms 42 and the connection of the pair of first intermediate elastic mechanisms 41 may be carried out in this order.

[0167] (Summary of Variation 3) According to Modification 3, the first intermediate gripping member 240a and the second intermediate gripping member 240b, which are separated from each other, can grip the first power cable 100a and the second power cable 100b separately. This allows the elastic gripping force on the first power cable 100a and the second power cable 100b to be adjusted separately.

[0168] (Modification 4) As shown in Figure 10, the cleat 20 of the modified example 4 may be configured to grip one power cable 100.

[0169] Specifically, the cleat 20 of modified example 4 includes, for example, a lower gripping member 220, an upper gripping member 260, and a pair of elastic mechanisms 50.

[0170] The pair of elastic mechanisms 50 includes, for example, a case 520, a spring 540, and a locking member 560. The case 520, spring 540, and locking member 560 in the pair of elastic mechanisms 50 are configured similarly to the upper case 320, upper spring 340, and upper locking member 360 in the pair of upper elastic mechanisms 30 of the above-described embodiment, except that the object to be gripped is a single power cable 100.

[0171] (Summary of variation 4) According to Modification 4, the same effects as in the above-described embodiment can be obtained even with a cleat 20 that grips a single power cable 100.

[0172] <Other embodiments of this disclosure> Although embodiments of this disclosure have been described in detail above, this disclosure is not limited to the embodiments described above, and various modifications are possible without departing from its essence.

[0173] In the embodiments described above, the cleat 20 is configured to individually and elastically grip the third power cable 100c, the first power cable 100a, and the second power cable 100b, respectively, using a pair of upper elastic mechanisms 30, a pair of first intermediate elastic mechanisms 41, and a pair of second intermediate elastic mechanisms 42. However, the disclosure is not limited to this case. The cleat 20 may also be configured to elastically grip the three-phase power cables 100 collectively using only a pair of upper elastic mechanisms 30, without having a pair of first intermediate elastic mechanisms 41 and a pair of second intermediate elastic mechanisms 42.

[0174] In the embodiments described above, the cleat 20 is configured to individually and elastically grip the lower-phase first power cable 100a and the second power cable 100b by a pair of first intermediate elastic mechanisms 41 and a pair of second intermediate elastic mechanisms 42 (i.e., a total of four intermediate elastic mechanisms 40), but the disclosure is not limited to this case. The cleat 20 may be configured to elastically grip the lower-phase first power cable 100a and the second power cable 100b together by only a pair of intermediate elastic mechanisms 40. In this case, the pair of intermediate elastic mechanisms 40 are located outside the first power cable 100a and the second power cable 100b, and no intermediate elastic mechanisms 40 are located between the first power cable 100a and the second power cable 100b.

[0175] The above-described embodiment described the case where the cleat 20 is applied to a power cable 100 for three-phase AC. However, the cleat 20 may also be applied to a power cable 100 for DC.

[0176] <Note> The details of this disclosure are described below.

[0177]

[18] A lower gripping member on which at least one power cable is placed, Between the lower gripping member and itself is an upper gripping member that grips the power cable, A pair of elastic mechanisms are arranged on both sides of the power cable, elastically connecting the lower gripping member and the upper gripping member, Equipped with, Each of the pair of elastic mechanisms is It is configured as a cylindrical member having a bottom on the vertically downward side, and is configured to be connectable to the upper gripping member, and is provided extending vertically downward from the upper gripping member, A spring housed within the case, having a first end in contact with the bottom of the case and a second end opposite to the first end, A locking member that, in an unfixed state relative to the case, locks the second end of the spring to the lower gripping member, has Cleat.

[0178]

[19] The process involves preparing the first power cable, the second power cable, and the third power cable, A step of installing at least one cleat for gripping the first power cable, the second power cable, and the third power cable, The steps include: arranging a water-cooling pipe for flowing water at the upper part of the aforementioned cleat; The steps include housing the cleat and the water cooling pipe inside the trough, Equipped with, The process of installing the aforementioned cleats is as follows: A lower-phase mounting step in which the first power cable and the second power cable are placed on the lower gripping member, An intermediate connecting step is performed in which the first power cable and the second power cable are gripped by the intermediate gripping member between the lower gripping member and the intermediate gripping member, An upper-phase mounting step in which the third power cable is placed on the vertically upper side of the intermediate gripping member, An upper-stage connecting step is provided in which a pair of upper-stage elastic mechanisms are arranged on at least both sides of the third power cable, and the lower gripping member and the upper gripping member are elastically connected by the pair of upper-stage elastic mechanisms, thereby causing the third power cable to be gripped by the upper gripping member between the intermediate gripping member and the upper gripping member, and, Equipped with, In the aforementioned upper coupling process, The process involves preparing an upper case, which is configured as a cylindrical member having a bottom on the vertically downward side, The process involves connecting the upper case to the upper gripping member and positioning it so that it is positioned vertically downward from the upper gripping member. A step of housing an upper spring having a first end and a second end opposite to the first end in the upper case, and bringing the first end of the upper spring into contact with the bottom of the upper case, The process of locking the second end of the upper spring to the lower gripping member with the upper locking member while the upper case is not fixed to it, has A method for manufacturing cable lines.

[0179]

[20] The process involves preparing the first power cable, the second power cable, and the third power cable, A step of installing at least one cleat for gripping the first power cable, the second power cable, and the third power cable, The steps include: arranging a water-cooling pipe for flowing water at the upper part of the aforementioned cleat; The steps include housing the cleat and the water cooling pipe inside the trough, Equipped with, The process of installing the aforementioned cleats is as follows: A lower-phase mounting step in which the first power cable and the second power cable are placed on the lower gripping member, An intermediate connecting step is performed in which the first power cable and the second power cable are gripped by the intermediate gripping member between the lower gripping member and the intermediate gripping member, An upper-phase mounting step in which the third power cable is placed on the vertically upper side of the intermediate gripping member, An upper-stage connecting step is provided in which a pair of upper-stage elastic mechanisms are arranged on at least both sides of the third power cable, and the lower gripping member and the upper gripping member are elastically connected by the pair of upper-stage elastic mechanisms, thereby causing the third power cable to be gripped by the upper gripping member between the intermediate gripping member and the upper gripping member, and, Equipped with, In the aforementioned upper coupling process, The process involves preparing an upper case configured as a cylindrical member having a bottom vertically downward side with a through hole through which the upper temporary fixing member can pass but the upper washer cannot, The process involves connecting the upper case to the upper gripping member and positioning it so that it is positioned vertically downward from the upper gripping member. The process involves preparing an upper spring having a first end and a second end opposite to the first end, an upper locking member having the upper temporary fixing member, and an upper washer, positioning the upper washer on the upper locking member so as to be in contact with the first end of the upper spring, and fixing the upper spring in a releasable state with the upper temporary fixing member, The process involves inserting the upper locking member, which connects the upper spring, the upper washer, and the upper temporary fixing member, into the upper case, and bringing the first end of the upper spring housed in the upper case into contact with the bottom of the upper case via the upper washer, The process involves fixing the upper locking member to the lower gripping member and releasing the upper temporary fixing member, thereby locking the second end of the upper spring to the lower gripping member by the upper locking member in a state where it is not fixed to the upper case, has A method for manufacturing cable lines. [Explanation of symbols]

[0180] 10 Cable lines 20 cleats 30 Upper elastic mechanism 40. Intermediate elastic mechanism 41. First Intermediate Elastic Mechanism 42. Second Intermediate Elastic Mechanism 50 Elastic Mechanism 60 water cooled pipe 80 Trough 100 Power Cables 100a No. 1 Power Cable 100b Second power cable 100c Third Power Cable 220 Lower gripping member 222a Slit 222b Slit 224 screw holes 240 Intermediate gripping member 242 Notch 244 Through holes 260 Upper gripping member 262 Notch 320 Upper case 322 Bottom 340 Upper spring 360 Upper locking member 361 Upper bolt 362 Head 363 Screw part 364 Upper nut 368 Upper temporary fixing member 420 Middle case 422 Bottom 440 Middle spring 460 Middle locking member 461 Middle bolt 462 Head 463 Screw part 464 Middle nut 465 Stud bolts 466 Middle nut 468 Temporary fixing member for the middle section 520 cases 540 Spring 560 Locking member

Claims

1. A lower gripping member on which the first power cable and the second power cable are placed, An intermediate gripping member that grips the first and second power cables between itself and the lower gripping member, and places the third power cable vertically above it, An upper gripping member that grips the third power cable is located between the intermediate gripping member and itself, A pair of upper elastic mechanisms are arranged on at least both sides of the third power cable and elastically connect the lower gripping member and the upper gripping member, Equipped with, Each of the pair of upper elastic mechanisms is It is configured as a cylindrical member having a bottom on the vertically downward side, and is configured to be connectable to the upper gripping member, and an upper case is provided extending vertically downward from the upper gripping member, An upper spring housed within the upper case, having a first end in contact with the bottom of the upper case and a second end opposite to the first end, An upper locking member that, in an unfixed state relative to the upper case, locks the second end of the upper spring to the lower gripping member, has Cleat.

2. At least one of the first power cable and the second power cable is sandwiched between at least one of the intermediate elastic mechanisms, and at least one of the intermediate elastic mechanisms elastically connects the lower gripping member and the intermediate gripping member, Equipped with, Each of the pair of intermediate elastic mechanisms is, It is configured as a cylindrical member having a bottom on the vertically downward side, and is configured to be connectable to the intermediate gripping member, and is provided vertically downward from the intermediate gripping member, A middle spring housed within the middle case, having a first end in contact with the bottom of the middle case and a second end opposite to the first end, A middle locking member that, in an unfixed state relative to the middle case, locks the second end of the middle spring to the lower gripping member, has The cleat according to claim 1.

3. A pair of first intermediate elastic mechanisms are configured as the aforementioned pair of intermediate elastic mechanisms, arranged on both sides of the first power cable, and elastically connect the lower gripping member and the intermediate gripping member, A pair of second intermediate elastic mechanisms are configured as the aforementioned pair of intermediate elastic mechanisms, arranged on both sides of the second power cable, and elastically connect the lower gripping member and the intermediate gripping member, Equipped with The cleat according to claim 2.

4. When viewed from above, The pair of upper elastic mechanisms are arranged diagonally with respect to the axial direction of the third power cable, with the third power cable in between. The pair of first intermediate elastic mechanisms are arranged in a direction intersecting the arrangement direction connecting the pair of upper elastic mechanisms, with the first power cable in between, and are arranged diagonally with respect to the axial direction of the first power cable. The pair of second intermediate elastic mechanisms are positioned across the second power cable in a direction intersecting the direction connecting the pair of upper elastic mechanisms, and are positioned diagonally with respect to the axial direction of the second power cable. The cleat according to claim 3.

5. The lower gripping member has a slit into which the upper locking member can be inserted from the outside of the lower gripping member. The cleat according to claim 1 or claim 2.

6. The upper locking member has an upper temporary fixing member that fixes the upper spring in a releaseable state when it is compressed. The cleat according to claim 1 or claim 2.

7. Each of the pair of upper elastic mechanisms has an upper washer that contacts the first end of the upper spring, The bottom of the upper case has a through hole through which the upper temporary fixing member can pass but the upper washer cannot. The first end of the upper spring abuts against the bottom of the upper case via the upper washer. The cleat according to claim 6.

8. The upper locking member has a stud bolt that penetrates the bottom of the upper case, is inserted into the upper spring inside the upper case, and is fixed to the lower gripping member. The cleat according to claim 1 or claim 2.

9. The lower gripping member has a slit into which the middle locking member can be inserted from the outside of the lower gripping member. The cleat according to claim 2 or claim 3.

10. The aforementioned middle locking member has a middle temporary fixing member that fixes the middle spring in a releaseable manner when the middle spring is compressed. The cleat according to claim 2 or claim 3.

11. Each of the pair of intermediate elastic mechanisms has an intermediate washer that contacts the first end of the intermediate spring, The bottom of the aforementioned middle case has a through hole through which the temporary fixing member of the middle section can pass, but the washer of the middle section cannot pass. The first end of the middle spring abuts against the bottom of the middle case via the middle washer. The cleat according to claim 10.

12. The aforementioned middle locking member has a stud bolt that penetrates the bottom of the middle case, is inserted into the middle spring inside the middle case, and is fixed to the lower gripping member. The cleat according to claim 2 or claim 3.

13. The aforementioned intermediate gripping member is A first intermediate gripping member that grips the first power cable is located between the lower gripping member and itself, A second intermediate gripping member that grips the second power cable is located between the lower gripping member and itself, Includes, The first intermediate gripping member and the second intermediate gripping member are configured to be separable from each other. The cleat according to claim 3.

14. Each of the first power cable, the second power cable, and the third power cable does not have a metal sheath. The cleat according to claim 1 or claim 2.

15. At least one cleat according to claim 1 or claim 2, A water cooling pipe for flowing water is provided at the top of the aforementioned cleat, A trough housing the cleat and the water cooling pipe, Equipped with Cable tracks.

16. A step of installing at least one cleat according to claim 1 or claim 2, The steps include: arranging a water-cooling pipe for flowing water at the upper part of the aforementioned cleat; The steps include housing the cleat and the water cooling pipe inside the trough, Equipped with A method for manufacturing cable lines.

17. A step of installing at least one cleat according to claim 1 or claim 2, The steps include: arranging a water-cooling pipe for flowing water at the upper part of the aforementioned cleat; The steps include housing the cleat and the water cooling pipe inside the trough, Equipped with How to install cable lines.

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