Optical fiber cable installation device and optical fiber cable installation method

Abstract

To reduce the time required to set an optical fiber cable in a bar-like member.SOLUTION: An optical fiber cable setting device 100 includes a pedestal 40 and a first reel 10 with an optical fiber cable 1 wound therearound, the reel being supported by the pedestal 40 rotatably. The optical fiber cable 1 extends from the first reel 10 along the direction of sending a bar-like member 4.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an apparatus and method for installing fiber optic cables underground. [Background technology]

[0002] When constructing a civil engineering structure or building underground or above ground, an optical fiber cable may be installed underground to detect the underground conditions. Patent Document 1 discloses a method for installing an optical fiber cable underground using a pipe.

[0003] In the method disclosed in Patent Document 1, first, an optical fiber cable is placed on the exterior surface of a pipe and secured to the pipe using adhesive or the like. Next, the pipe is inserted into a borehole drilled in the ground. Next, a second pipe is connected to the first pipe using a connecting socket, and the optical fiber cable is secured to the second pipe while being inserted further into the borehole. By repeating this process, the optical fiber cable is installed to the desired depth. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 10-197298 Summary of the Invention [Problem to be solved by the invention]

[0005] Before being fixed to a rod-shaped member such as a pipe, an optical fiber cable is wound on a reel and is unwound from the reel when being fixed to the rod-shaped member. Currently, when fixing an optical fiber cable to a rod-shaped member that is to be sent underground, for example, a worker holds the reel, unwinds the optical fiber cable from the reel, and places the optical fiber cable on the rod-shaped member along the direction of its unwinding. This involves a lot of tedious work, and it takes a significant amount of time to install an optical fiber cable underground.

[0006] SUMMARY OF THE INVENTION An object of the present invention is to reduce the time required to install an optical fiber cable on a rod-shaped member. [Means for solving the problem]

[0007] The present invention is an optical fiber cable installation device used to fix an optical fiber cable to a rod-shaped member being fed out and install the optical fiber cable together with the rod-shaped member underground, and comprises: a stand; a first reel rotatably supported on the stand and around which the optical fiber cable is wound; and a second reel rotatably supported on the stand and around which adhesive tape, covered with release paper, for fixing the optical fiber cable to the rod-shaped member is wound; the optical fiber cable is fed out from the first reel and fed to the rod-shaped member along the feeding direction of the rod-shaped member, and the adhesive tape is fed out from the second reel and fed between the optical fiber cable fed to the rod-shaped member and the rod-shaped member. The present invention also provides an optical fiber cable installation device used to fix an optical fiber cable to a rod-shaped member that is delivered and install the optical fiber cable together with the rod-shaped member underground, the device comprising: a stand; a first reel that is rotatably supported on the stand and on which the optical fiber cable is wound while being adhered to an adhesive portion and covered with release paper; and a release paper recovery reel that is rotatably provided on the stand and recovers the release paper. a third reel rotatably supported on the mount and wound with a protective tape for protecting the optical fiber cable fixed to the rod-shaped member; The optical fiber cable is unwound from the first reel and fed to the rod-shaped member along the feeding direction of the rod-shaped member. At the same time, the protective tape fed from the third reel to the rod-shaped member is fed between the rod-shaped member and the protective tape. The release paper recovery reel recovers the release paper that has been peeled off from the adhesive portion. The present invention also provides an optical fiber cable installation device used to fix an optical fiber cable to a rod-shaped member being fed out and install the optical fiber cable together with the rod-shaped member underground, further comprising: a stand; a first reel rotatably supported on the stand and around which the optical fiber cable is wound; and a third reel rotatably supported on the stand and around which a protective tape is wound to protect the optical fiber cable fixed to the rod-shaped member, wherein the optical fiber cable is unwound from the first reel and fed to the rod-shaped member along the feeding direction of the rod-shaped member, and is fed between the protective tape fed from the third reel to the rod-shaped member and the rod-shaped member.

[0008] The present invention also provides an optical fiber cable installation method for fastening an optical fiber cable to a rod-shaped member being fed out and installing the optical fiber cable together with the rod-shaped member underground, comprising: a first reel around which the optical fiber cable is wound, which is rotatably provided on a mount; a second reel around which adhesive tape for fastening the optical fiber cable to the rod-shaped member is wound and covered with release paper, which is rotatably provided on the mount; the optical fiber cable is unwound from the first reel and fed to the rod-shaped member along the feeding direction of the rod-shaped member; and the adhesive tape is unwound from the second reel and fed between the optical fiber cable fed to the rod-shaped member and the rod-shaped member. 。 [Effects of the Invention]

[0009] According to the present invention, the time required to install an optical fiber cable on a rod-shaped member can be reduced. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic cross-sectional view of an optical fiber cable installation device according to a first embodiment of the present invention, illustrating a state in which an optical fiber cable is being installed underground using the optical fiber cable installation device. [Figure 2] 2(a) is a front view of the optical fiber cable installation device shown in FIG. 1, and FIG. 2(b) is a cross-sectional view taken along line IIB-IIB shown in FIG. 2(a). [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. 2(b). [Figure 4] FIG. 4 is an enlarged view of part IV shown in FIG. [Figure 5] FIG. 4 is an enlarged view of a V portion shown in FIG. [Figure 6] 10 is a cross-sectional view of an optical fiber cable installation device according to a second embodiment of the present invention, shown in correspondence with FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII shown in FIG. [Figure 8]10 is a cross-sectional view of an optical fiber cable installation device according to a modified example of the embodiment of the present invention, shown in correspondence with FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an optical fiber cable installation device and an optical fiber cable installation method according to an embodiment of the present invention will be described with reference to the drawings.

[0012] First Embodiment First, an optical fiber cable installation device 100 and an optical fiber cable installation method according to a first embodiment of the present invention will be described with reference to FIGS.

[0013] 1 is a schematic cross-sectional view of an optical fiber cable installation device 100, showing a state in which an optical fiber cable 1 is being installed underground using the optical fiber cable installation device 100. The optical fiber cable 1 is installed underground to grasp the conditions underground (for example, strain or temperature underground).

[0014] The optical fiber cable 1 has the property of slightly scattering incident pulsed light backward, and by utilizing this property, it is possible to measure strain and temperature at multiple positions in the optical fiber cable 1. Specifically, since the frequency of scattered light depends on the strain and temperature of the optical fiber cable 1, by incident pulsed light into the optical fiber cable 1 and measuring the frequency of the scattered light, it is possible to measure the strain and temperature of the optical fiber cable 1 at the position where the scattered light occurs. The position where the scattered light occurs can be identified by measuring the time from when pulsed light is incident into the optical fiber cable 1 until the scattered light returns to the incident position. By identifying multiple positions where scattered light occurs, it is possible to measure strain and temperature at multiple positions in the optical fiber cable 1.

[0015] By installing the optical fiber cable 1 underground and measuring the strain or temperature at multiple positions on the optical fiber cable 1, it is possible to measure the strain or temperature in the ground at multiple positions, thereby making it possible to grasp the condition of the ground.

[0016] In this embodiment, the optical fiber cable 1 is fixed to a rod-shaped member 4 that is fed into a borehole 5 formed vertically in the ground, and is installed underground together with the rod-shaped member 4. After the rod-shaped member 4 is fed, grout material is filled between the outer surface of the rod-shaped member 4 and the inner surface of the borehole 5. The rod-shaped member 4 is, for example, a pipe. The rod-shaped member 4 may also be a solid rod. The rod-shaped member 4 is manually fed into the ground by a worker. The optical fiber cable installation device 100 is used to install the optical fiber cable 1 underground together with the rod-shaped member 4. Note that a worker may intervene to fix the optical fiber cable 1 to the rod-shaped member 4.

[0017] Fig. 2(a) is a front view of the optical fiber cable installation device 100, and Fig. 2(b) is a cross-sectional view taken along line IIB-IIB in Fig. 2(a). Fig. 3 is a cross-sectional view taken along line III-III in Fig. 2(b).

[0018] 2(a) and 2(b) and 3, the optical fiber cable installation device 100 includes a stand 40 and a first reel 10 rotatably supported on the stand 40. An optical fiber cable 1 is wound around the first reel 10.

[0019] The platform 40 includes four base plates 41 placed on the ground and four support columns 42 supported by the base plates 41. The support columns 42 are fixed to the base plate 41 using, for example, bolts. The base plates 41 and the support columns 42 are arranged at equal intervals around the rod-shaped member 4 that is sent into the ground.

[0020] The support 42 includes a pair of pillar members 42a, 42b with a U-shaped cross section. The pair of pillar members 42a, 42b extends along the feed direction of the rod-shaped member 4 and is spaced apart horizontally. A first reel 10 is provided between the pair of pillar members 42a, 42b on each support 42. That is, like the support 42, four first reels 10 are arranged at equal intervals around the rod-shaped member 4 that is fed underground. Therefore, when looking at the rod-shaped member 4 in the feed direction of the rod-shaped member 4, the optical fiber cable 1 is fed to four locations on the outer circumferential surface of the rod-shaped member 4 at 90° intervals.

[0021] 3, the first reel 10, the base plate 41, and the support pillars 42, which are located on the inner and outer sides of the page relative to the rod-shaped member 4, are not shown. Similarly, the second reel 20 and the third reel 30, which will be described later, are not shown in the figure, as they are located on the inner and outer sides of the page relative to the rod-shaped member 4.

[0022] In this way, since the first reel 10 is rotatably supported on the mount 40, when the rod-shaped member 4 is fed out, the optical fiber cable 1 is pulled by the rod-shaped member 4 and is paid out from the first reel 10. This reduces the work of workers holding the first reel 10 and paying out the optical fiber cable 1 from the first reel 10. This therefore reduces the time required to install the optical fiber cable 1 underground.

[0023] The shaft 11 of the first reel 10 is supported by the pair of pillar members 42a, 42b so as to be approximately perpendicular to the pair of pillar members 42a, 42b. The optical fiber cable 1 is unwound from the first reel 10, passes through first guide rollers 12 described below, and is then fed to the rod-shaped member 4 in the direction in which the pair of pillar members 42a, 42b extend, i.e., along the feed-out direction of the rod-shaped member 4. Therefore, the optical fiber cable 1 unwound from the first reel 10 is fixed to the rod-shaped member 4 along the feed-out direction. Therefore, the optical fiber cable 1 can be installed underground with a small inclination of the rod-shaped member 4 with respect to the feed-out direction, and the optical fiber cable can be fixed to the rod-shaped member 4 with high precision.

[0024] The shaft 11 of the first reel 10 is inserted through a hole 42c formed in a pair of pillar members 42a, 42b. A plurality of holes 42c are formed along the direction in which the rod-shaped member 4 is released. By changing the hole 42c through which the shaft 11 of the first reel 10 is inserted, the position (height) of the first reel 10 can be easily changed.

[0025] The mount 40 is provided with a first connecting member 43 that connects the support posts 42 together. The first connecting member 43 is a cross formed by assembling angle irons in the shape of a cross. The first connecting member 43 is arranged approximately horizontally, and the rod-shaped member 4 can be inserted through the center of the first connecting member 43.

[0026] The first connecting member 43 is fixed to the support 42 by passing a bolt 43a through a hole 42d formed in the support 42. Similar to the hole 42c, a plurality of holes 42d are formed along the feeding direction of the rod-shaped member 4. By changing the hole 42d through which the bolt 43a is inserted, the position (height) of the first connecting member 43 can be easily changed.

[0027] A first guide roller 12 that guides the optical fiber cable 1 unwound from the first reel 10 toward the rod-shaped member 4 is rotatably supported by the first connecting member 43. Therefore, the optical fiber cable 1 unwound from the first reel 10 is changed in direction by the first guide roller 12 and advances toward the rod-shaped member 4. Therefore, the inclination of the rod-shaped member 4 with respect to the feeding direction can be made smaller, and the optical fiber cable 1 can be fixed to the rod-shaped member 4.

[0028] Since the first guide roller 12 is supported by the first connecting member 43, the position (height) of the first guide roller 12 can be changed by changing the position (height) of the first connecting member 43.

[0029] The optical fiber cable installation device 100 includes a second reel 20 rotatably supported on a stand 40. The second reel 20 is disposed above the first reel 10. An adhesive tape 2 is wound around the second reel 20 to fix the optical fiber cable 1 to the rod-shaped member 4. The adhesive tape 2 is a double-sided adhesive tape with adhesive on both sides. Note that the second reel 20 and the adhesive tape 2 are not shown in FIG. 1.

[0030] Figure 4 is an enlarged view of part IV shown in Figure 3. In Figure 4, the support 42 is not shown. As shown in Figure 4, the adhesive tape 2 is wound around the second reel 20 with one side covered with a release paper 2a. Note that the adhesive tape 2 and the release paper 2a are actually 1 mm or less in thickness and are extremely thin compared to the second reel 20 and the rod-shaped member 4, etc., but for convenience of explanation, the thicknesses of the adhesive tape 2 and the release paper 2a are exaggerated in Figure 4. The release paper 2a is peeled off from the adhesive tape 2 after the adhesive tape 2 is unwound from the second reel 20 and the other side of the adhesive tape 2 is adhered to the rod-shaped member 4.

[0031] 3, the adhesive tape 2 is fed between the optical fiber cable 1 that has been unwound from the second reel 20 and fed to the rod-shaped member 4 via the second guide roller 22, which will be described later, and the rod-shaped member 4. Therefore, the optical fiber cable 1 that has been unwound from the first reel 10 and fed to the rod-shaped member 4 is adhered to the adhesive tape 2 that has been adhered to the rod-shaped member 4. Therefore, the optical fiber cable 1 can be easily fixed to the rod-shaped member 4. The second guide roller 22 is disposed and positioned in the opposite direction (above) of the feeding direction of the rod-shaped member 4 relative to the first guide roller 12.

[0032] Although not shown in the drawings, the second guide roller 22 may be disposed and positioned inside the first guide roller 12 when viewed in the feed-out direction of the rod-shaped member 4. In this case, the second guide roller 22 does not have to be disposed in the opposite direction (above) of the feed-out direction of the rod-shaped member 4 when viewed in ...

[0033] The second guide roller 22 may be disposed and positioned inside the first guide roller 12 when viewed in the feed-out direction of the rod-shaped member 4 and in the opposite direction (above) to the feed-out direction of the rod-shaped member 4.

[0034] Since the second reel 20 is rotatably supported by the frame 40, when the rod-shaped member 4 is fed out, the adhesive tape 2 is pulled by the rod-shaped member 4 and is fed out from the second reel 20. This reduces the work of the worker, such as holding the second reel 20 and feeding out the adhesive tape 2 from the second reel 20. This reduces the time required to install the optical fiber cable 1 underground.

[0035] The width of the adhesive tape 2 is larger than the width (outer diameter) of the optical fiber cable 1. Therefore, when the optical fiber cable 1 is adhered to the adhesive tape 2, a part of the adhesive tape 2 is exposed and not covered by the optical fiber cable 1. A protective tape 3, which will be described later, is adhered to the exposed part of the adhesive tape 2.

[0036] As shown in Figures 3 and 4, a release paper recovery reel 24 that recovers the release paper 2a is rotatably provided on the frame 40. Therefore, after the adhesive tape 2 (to which the release paper 2a is attached) passes the second guide roller 22, the release paper 2a is peeled from the adhesive tape 2 and recovered by the release paper recovery reel 24. This further reduces the need for a worker to perform the complicated task of recovering the release paper 2a, and shortens the time required to install the optical fiber cable 1 underground. Note that the release paper 2a and the release paper recovery reel 24 are not shown in Figures 1 and 2. The release paper recovery reel 24 is disposed and positioned in the feed direction (downward) of the rod-shaped member 4 relative to the second guide roller 22.

[0037] The release paper recovery reel 24 may be configured to be rotated manually by an operator, or may be configured to be rotated in response to the rotation of the second reel 20.

[0038] The release paper recovery reel 24 is fixed to the support 42 by passing a bolt (not shown) through a hole 42d formed in the support 42. By changing the hole 42d through which the bolt is inserted, the position (height) of the release paper recovery reel 24 can be easily changed.

[0039] The shaft 21 of the second reel 20 is inserted through holes 42c formed in a pair of pillar members 42a, 42b, similar to the shaft 11 of the first reel 10. Therefore, by changing the hole 42c through which the shaft 21 of the second reel 20 is inserted, the position (height) of the second reel 20 can be easily changed.

[0040] The mount 40 is provided with second connecting members 44 that are disposed above the first connecting members 43 and connect the columns 42 together. The second connecting members 44 are, like the first connecting members 43, a cross-like structure formed by assembling angle irons in the shape of a cross. The second connecting members 44 are disposed substantially horizontally, and the rod-shaped members 4 can be inserted through the centers of the second connecting members 44.

[0041] Similar to the first connecting member 43, the second connecting member 44 is fixed to the support 42 by passing a bolt 44a through a hole 42d formed in the support 42. By changing the hole 42d through which the bolt 44a is inserted, the position (height) of the second connecting member 44 can be easily changed.

[0042] A second guide roller 22 is rotatably supported on the second connecting member 44, and guides the adhesive tape 2 with the release paper 2a that is unwound from the second reel 20 toward the rod-shaped member 4. Therefore, the adhesive tape 2 unwound from the second reel 20 is changed in direction by the second guide roller 22 and advances toward the rod-shaped member 4. Therefore, the inclination of the rod-shaped member 4 with respect to the feeding direction can be reduced, and the adhesive tape 2 can be fixed to the rod-shaped member 4.

[0043] Furthermore, the path of the adhesive tape 2 is stabilized by passing the adhesive tape 2 over the second guide roller 22. Therefore, it is possible to prevent the adhesive tapes 2 from sticking together.

[0044] Since the second guide roller 22 is supported by the second connecting member 44, the position (height) of the second guide roller 22 can be changed by changing the position (height) of the second connecting member 44.

[0045] The optical fiber cable installation device 100 includes a third reel 30 rotatably supported on a stand 40. The third reel 30 is disposed below the first reel 10. A protective tape 3 for protecting the optical fiber cable 1 is wound around the third reel 30. The protective tape 3 is, for example, an aluminum tape. The protective tape 3 unwound from the third reel 30 is adhered to the exposed portion of the adhesive tape 2 adhered to the rod-shaped member 4.

[0046] The optical fiber cable 1 is unwound from the first reel 10, passes through the first guide roller 12, and is then fed between the protective tape 3 fed from the third reel 30 to the rod-shaped member 4 and the rod-shaped member 4. Therefore, the optical fiber cable 1 unwound from the first reel 10 and fixed to the rod-shaped member 4 is covered with the protective tape 3. This prevents the optical fiber cable 1 from coming into contact with the ground and being damaged when the optical fiber cable 1 is fed into the ground together with the rod-shaped member 4.

[0047] Furthermore, because the third reel 30 is rotatably supported by the stand 40, when the rod-shaped member 4 is fed out, the protective tape 3 is pulled by the rod-shaped member 4 and is unwound from the third reel 30. This reduces the work of the worker holding the third reel 30 and unwinding the protective tape 3 from the third reel 30.

[0048] The shaft 31 of the third reel 30 is inserted through holes 42c formed in a pair of pillar members 42a, 42b, similar to the shaft 11 of the first reel 10. Therefore, by changing the hole 42c through which the shaft 31 of the third reel 30 is inserted, the position (height) of the third reel 30 can be easily changed.

[0049] The mount 40 includes a third connecting member 45 that is disposed below the first connecting member 43 and connects the columns 42 together. The third connecting member 45 is a cross formed by assembling angle irons in the shape of a cross, similar to the first connecting member 43. The third connecting member 45 is disposed substantially horizontally, and the rod-shaped member 4 can be inserted through the center of the third connecting member 45.

[0050] Similar to the first connecting member 43, the third connecting member 45 is fixed to the support 42 by passing a bolt 45a through a hole 42d formed in the support 42. By changing the hole 42d through which the bolt 45a is inserted, the position (height) of the third connecting member 45 can be easily changed.

[0051] A third guide roller 32 that guides the protective tape 3 unwound from the third reel 30 toward the rod-shaped member 4 is rotatably supported by the third connecting member 45. Therefore, the protective tape 3 unwound from the third reel 30 is changed in direction by the third guide roller 32 and advances toward the rod-shaped member 4. Therefore, the inclination of the rod-shaped member 4 with respect to the feeding direction can be reduced, and the protective tape 3 can be fixed to the rod-shaped member 4. The third guide roller 32 is disposed and positioned in the feeding direction (below) of the rod-shaped member 4 relative to the first guide roller 12.

[0052] Although not shown in the figures, the third guide roller 32 may be disposed and positioned outward from the first guide roller 12 when viewed in the feed-out direction of the rod-shaped member 4. In this case, the third guide roller 32 does not have to be disposed in the feed-out direction (below) of the first guide roller 12. In other words, the third guide roller 32 may be disposed and positioned at the same position (same height) as the first guide roller 12 in the feed-out direction of the rod-shaped member 4, or in the opposite direction to the feed-out direction (above) from the first guide roller 12, and may be disposed and positioned outward when viewed in the feed-out direction of the rod-shaped member 4.

[0053] The third guide roller 32 may be disposed and positioned outside the first guide roller 12 when viewed in the feed-out direction of the rod-shaped member 4, and in the feed-out direction of the rod-shaped member 4 (below).

[0054] The third guide roller 32 is supported by the third connecting member 45, and therefore the position (height) of the third guide roller 32 can be changed by changing the position (height) of the third connecting member 45.

[0055] The mount 40 is provided with a fourth connecting member 46 that is disposed below the third connecting member 45 and connects the columns 42 together. The fourth connecting member 46 is a cross formed by assembling angle irons in the shape of a cross, similar to the first connecting member 43. The fourth connecting member 46 is disposed substantially horizontally, and the rod-shaped member 4 can be inserted through the center of the fourth connecting member 46.

[0056] In the optical fiber cable installation device 100, the spacing between the posts 42 can be maintained by the first connecting member 43, the second connecting member 44, the third connecting member 45, and the fourth connecting member 46. Therefore, the frame 40 can be stabilized, and the optical fiber cable 1, the adhesive tape 2, and the protective tape 3 can be unwound from the first reel 10, the second reel 20, and the third reel 30, respectively, along the feeding direction of the rod-shaped member 4. On the rod-shaped member 4, the adhesive tape 2 wound on the second reel 20, the optical fiber cable 1 wound on the first reel 10, and the protective tape 3 wound on the third reel 30 are stacked in this order from the side closest to the rod-shaped member 4. In other words, the items wound on the second reel 20, the first reel 10, and the third reel 30 are arranged so that they can be stacked in order from the side closest to the rod-shaped member 4 (inside). Similarly, the second guide roller 22, the first guide roller 12, and the third guide roller 32 are arranged so that the materials wound on the second reel 20, the first reel 10, and the third reel 30, respectively, can be stacked starting from the side closest to the rod-shaped member 4.

[0057] The mount 40 is provided with brake plates 13, 23, 33 (see FIGS. 2(a) and 2(b)) that apply brakes to the first reel 10, the second reel 20, and the third reel 30. Therefore, the rotation of the first reel 10, the second reel 20, and the third reel 30 is limited by the brake plates 13, 23, 33. This prevents the first reel 10, the second reel 20, and the third reel 30 from rotating too much, which would result in the optical fiber cable 1, the adhesive tape 2, and the protective tape 3 being excessively unwound, and the optical fiber cable 1, the adhesive tape 2, and the protective tape 3 can be easily fixed to the rod-shaped member 4.

[0058] An eyebolt 47 is attached to the upper end of the support 42. Therefore, the optical fiber cable installation device 100 can be lifted using a lifting machine (not shown), such as a crane. Therefore, the optical fiber cable installation device 100 can be easily moved using the lifting machine.

[0059] FIG. 5 is an enlarged view of the V portion shown in FIG. 3. As shown in FIG. 5, the base plate 41 includes a lower plate 41a placed on the ground, an upper plate 41b disposed above the lower plate 41a, a bolt 41c inserted vertically through the upper plate 41b, and a nut 41d threaded onto the bolt 41c. A support 42 is fixed to the upper plate 41b. The nut 41d is fixed to the lower plate 41a by welding, for example. A support 41e is provided on the bolt 41c to support the upper plate 41b. The support 41e is immovable relative to the bolt 41c. Therefore, when the bolt 41c is turned to move the bolt 41c upward or downward relative to the nut 41d, the support 41e moves upward or downward together with the bolt 41c. The movement of the support 41e causes the upper plate 41b to move upward or downward. Therefore, the distance between the upper plate 41b and the lower plate 41a can be adjusted, and the height and verticality of the support pillar 42 can be adjusted.

[0060] According to the first embodiment described above, the following advantageous effects are achieved.

[0061] In the optical fiber cable installation device 100 and the optical fiber cable installation method, the first reel 10 around which the optical fiber cable 1 is wound is rotatably supported by the mount 40. Therefore, when the rod-shaped member 4 is fed out, the optical fiber cable 1 is pulled by the rod-shaped member 4 and is paid out from the first reel 10. This reduces the work of the worker, such as holding the first reel 10 and paying out the optical fiber cable 1 from the first reel 10, and shortens the time required to install the optical fiber cable 1 underground.

[0062] Furthermore, the optical fiber cable 1 is unwound from the first reel 10 and fed to the rod-shaped member 4 along the feed direction of the rod-shaped member 4. Therefore, the optical fiber cable 1 unwound from the first reel 10 is fixed to the rod-shaped member 4 along the feed direction. Therefore, the optical fiber cable 1 can be fixed to the rod-shaped member 4 with a small inclination of the rod-shaped member 4 relative to the feed direction, and the underground conditions can be grasped with high accuracy.

[0063] Furthermore, in the optical fiber cable installation device 100, the adhesive tape 2 is fed between the optical fiber cable 1 that is unwound from the second reel 20 and fed to the rod-shaped member 4 and the rod-shaped member 4. Therefore, the optical fiber cable 1 that is unwound from the first reel 10 and fed to the rod-shaped member 4 is adhered to the adhesive tape 2 that is adhered to the rod-shaped member 4. Therefore, the optical fiber cable 1 can be easily fixed to the rod-shaped member 4.

[0064] Furthermore, in the optical fiber cable installation device 100, a release paper recovery reel 24 that recovers the release paper 2a is rotatably provided on the frame 40. Therefore, after the release paper 2a is peeled off from the adhesive tape 2, it is recovered by the release paper recovery reel 24. This further reduces the need for the worker to perform complicated tasks such as recovering the release paper 2a, and shortens the time required to install the optical fiber cable 1 underground.

[0065] Furthermore, in the optical fiber cable installation device 100, the third reel 30 around which the protective tape 3 is wound is rotatably supported by the mount 40, and the optical fiber cable 1 is unwound from the first reel 10 and fed between the protective tape 3 fed from the third reel 30 to the rod-shaped member 4 and the rod-shaped member 4. Therefore, the optical fiber cable 1 unwound from the first reel 10 and fixed to the rod-shaped member 4 is covered with the protective tape 3. Therefore, when the optical fiber cable 1 is fed into the ground together with the rod-shaped member 4, the optical fiber cable 1 can be prevented from coming into contact with the ground and being damaged.

[0066] Although the optical fiber cable installation device 100 is provided with four first reels 10, the number of first reels 10 may be one, two, three, or five or more. The first reels 10 do not have to be arranged at equal intervals around the rod-shaped member 4. The same applies to the number and arrangement of the second reels 20 and third reels 30.

[0067] Second Embodiment Next, an optical fiber cable installation device 200 according to a second embodiment of the present invention will be described with reference to Figures 6 and 7. Below, differences from the first embodiment will be mainly described, and configurations that are the same as or equivalent to those described in the first embodiment will be denoted by the same reference numerals in the figures as in the first embodiment, and descriptions thereof will be omitted.

[0068] Fig. 6 is a cross-sectional view of the optical fiber cable installation device 200, and corresponds to Fig. 3. Fig. 7 is a cross-sectional view taken along line VII-VII shown in Fig. 6.

[0069] As shown in Fig. 7, in this embodiment, the optical fiber cable 1 is adhered to one side of the adhesive tape 2 as an adhesive part and is covered with a release paper 2a, and is wound around the first reel 10. That is, the optical fiber cable 1 is wound around the first reel 10 in a state where it is integrated with the adhesive tape 2. This is different from the first embodiment. Note that the adhesive tape 2 and the release paper 2a are actually very thin, being 1 mm or less in thickness compared to the optical fiber cable 1, but in Fig. 7, the thicknesses of the adhesive tape 2 and the release paper 2a are exaggerated for ease of explanation.

[0070] 6, the first reel 10 around which the optical fiber cable 1 with the adhesive tape 2 and release paper 2a provided is wound is rotatably supported by the mounting base 40. Therefore, when the rod-shaped member 4 is fed out, the optical fiber cable 1 and the adhesive tape 2 are pulled by the rod-shaped member 4 and are paid out from the first reel 10. This reduces the work of the worker holding the first reel 10 and paying out the optical fiber cable 1 and the adhesive tape 2 from the first reel 10, and shortens the time required to install the optical fiber cable 1 underground.

[0071] The optical fiber cable 1 and the adhesive tape 2 are unwound from the first reel 10, pass through the first guide roller 12, and are then fed to the rod-shaped member 4 along the feed direction of the rod-shaped member 4. Therefore, the optical fiber cable 1 and the adhesive tape 2 unwound from the first reel 10 are fixed to the rod-shaped member 4 along the feed direction. Therefore, the inclination of the rod-shaped member 4 with respect to the feed direction can be reduced, and the underground condition can be grasped with high accuracy.

[0072] Furthermore, the optical fiber cable 1 and adhesive tape 2 unwound from the first reel 10 are guided toward the rod-shaped member 4 by the first guide roller 12. Therefore, the optical fiber cable 1 can be fixed to the rod-shaped member 4 with a smaller inclination of the rod-shaped member 4 relative to the feeding direction.

[0073] The release paper 2a is peeled off from the adhesive tape 2 and the optical fiber cable 1 after the adhesive tape 2 has been adhered to the rod-shaped member 4. The width of the adhesive tape 2 is greater than the width (outer diameter) of the optical fiber cable 1, and a part of the adhesive tape 2 is exposed and not covered by the optical fiber cable 1. A protective tape 3, which will be described later, is adhered to the exposed part of the adhesive tape 2.

[0074] A release paper recovery reel 24 that recovers the release paper 2a is rotatably provided on the mount 40. Therefore, after the release paper 2a is peeled off from the adhesive tape 2, it is recovered by the release paper recovery reel 24. This further reduces the need for workers to perform complicated tasks such as recovering the release paper 2a, and shortens the time required to install the optical fiber cable 1 underground.

[0075] The release paper recovery reel 24 may be configured to be rotated manually by an operator, or may be configured to be rotated in response to the rotation of the second reel 20.

[0076] In this embodiment, the adhesive tape 2 is a double-sided adhesive tape that is integrated with the optical fiber cable 1. A single-sided adhesive tape may be used as the adhesive tape 2, and an optical fiber cable 1 integrated with the single-sided adhesive tape may be used. Alternatively, an optical fiber cable 1 may be used that has an adhesive portion that fixes the optical fiber cable 1 to the rod-shaped member 4 and a release paper 2a that covers the adhesive portion. In these cases, a protective tape 3 having an adhesive surface may be used, and the protective tape 3 may be adhered to the optical fiber cable 1 and the adhesive tape 2.

[0077] <Modification> In the first and second embodiments, the case where the rod-shaped member 4 is fed vertically to install the optical fiber cable 1 underground has been described. However, the present invention also allows the rod-shaped member 4 to be fed horizontally or obliquely to install the optical fiber cable 1 underground.

[0078] Fig. 8 is a cross-sectional view of an optical fiber cable installation device 101 used to install an optical fiber cable 1 underground by horizontally feeding out a rod-shaped member 4, and is shown corresponding to Fig. 3. As shown in Fig. 8, the support columns 42 of the mounting base 40 are supported on a base plate 41 so as to extend horizontally. Furthermore, the first connecting member 43, the second connecting member 44, the third connecting member 45, and the fourth connecting member 46 are arranged substantially vertically.

[0079] In the optical fiber cable installation device 101, the first reel 10, the second reel 20, and the third reel 30 are also rotatably supported on the mount 40. Therefore, when the rod-shaped member 4 is fed out, the optical fiber cable 1 is pulled by the rod-shaped member 4 and is unwound from the first reel 10. This reduces the work required by the worker to hold the first reel 10, the second reel 20, and the third reel 30, and to unwind the optical fiber cable 1, the adhesive tape 2, and the protective tape 3. This reduces the time required to install the optical fiber cable 1 underground.

[0080] Furthermore, the optical fiber cable 1, adhesive tape 2, and protective tape 3 are respectively unwound from the first reel 10, the second reel 20, and the third reel 30, and fed to the rod-shaped member 4 in the feed direction of the rod-shaped member 4. Therefore, the optical fiber cable 1, adhesive tape 2, and protective tape 3 are fixed to the rod-shaped member 4 along the feed direction. Therefore, the inclination of the rod-shaped member 4 with respect to the feed direction can be reduced, and the underground condition can be grasped with high accuracy.

[0081] An illustration of an optical fiber cable installation device used to install the optical fiber cable 1 underground by feeding out the rod-shaped member 4 at an angle is omitted.

[0082] Although the embodiments of the present invention have been described above, the above embodiments merely illustrate some of the application examples of the present invention, and it is not intended that the technical scope of the present invention be limited to the specific configurations of the above embodiments.

[0083] In the above embodiment, the device is described as installing the optical fiber cable 1 underground, but the device may also be used for attaching the optical fiber cable 1 to concrete structures such as bridges, bridge piers, dams, levees, and retaining walls, or for installing the optical fiber cable 1 in holes formed in these concrete structures, rather than installing the optical fiber cable 1 underground. As in the present embodiment, the state of the structure can be grasped.

[0084] In the first and second embodiments, the optical fiber cable 1 is fixed to the rod-shaped member 4 using the adhesive tape 2, but the optical fiber cable 1 may be fixed to the rod-shaped member 4 by applying an adhesive to the rod-shaped member 4. In this case, the adhesive tape 2 and the second reel 20 around which the adhesive tape 2 is wound are not necessary.

[0085] In the first and second embodiments, the optical fiber cable 1 is covered with the protective tape 3 to prevent the optical fiber cable 1 from coming into contact with the ground and being damaged. If there is no risk of the optical fiber cable 1 being damaged, there is no need to use the protective tape 3, and the protective tape 3 and the third reel 30 around which the protective tape 3 is wound are not required. [Explanation of symbols]

[0086] 100, 101, 200... Optical fiber cable installation equipment 1. Optical fiber cable 2. Adhesive tape 3. Protective tape 4. Rod-shaped member 4b...Aperture 10...1st reel 20...2nd reel 24. Release paper recovery reel 30...3rd reel 40... Mounting stand

Claims

1. An optical fiber cable installation device used to fix an optical fiber cable to a rod-shaped member that is delivered and install the optical fiber cable together with the rod-shaped member underground, comprising: A stand and a first reel rotatably supported by the frame and around which the optical fiber cable is wound; a second reel rotatably supported by the mount, on which adhesive tape for fixing the optical fiber cable to the rod-shaped member is wound while being covered with release paper; the optical fiber cable is unwound from the first reel and fed to the rod-shaped member along the feeding direction of the rod-shaped member, the adhesive tape is unwound from the second reel and fed between the optical fiber cable fed to the rod-shaped member and the rod-shaped member; Fiber optic cable installation equipment.

2. a release paper recovery reel rotatably mounted on the stand for recovering the release paper peeled from the adhesive tape; 2. The optical fiber cable installation device according to claim 1.

3. An optical fiber cable installation device used to fix an optical fiber cable to a rod-shaped member that is delivered and install the optical fiber cable together with the rod-shaped member underground, comprising: A stand and a first reel rotatably supported by the frame, on which the optical fiber cable is wound while being adhered to an adhesive portion and covered with a release paper; a release paper recovery reel rotatably provided on the stand for recovering the release paper; a third reel rotatably supported by the mount and wound with a protective tape for protecting the optical fiber cable fixed to the rod-shaped member, the optical fiber cable is unwound from the first reel, fed to the rod-shaped member along the feeding direction of the rod-shaped member, and fed between the protective tape fed from the third reel to the rod-shaped member and the rod-shaped member, the release paper recovery reel recovers the release paper peeled from the adhesive portion. Fiber optic cable installation equipment.

4. a third reel rotatably supported by the mount and wound with a protective tape for protecting the optical fiber cable fixed to the rod-shaped member; the optical fiber cable is unwound from the first reel and fed between the protective tape fed from the third reel to the rod-shaped member and the rod-shaped member; 3. The optical fiber cable installation device according to claim 1 or 2.

5. An optical fiber cable installation device used to fix an optical fiber cable to a rod-shaped member that is delivered and install the optical fiber cable together with the rod-shaped member underground, comprising: A stand and a first reel rotatably supported by the frame and around which the optical fiber cable is wound; a third reel rotatably supported by the mount and wound with a protective tape for protecting the optical fiber cable fixed to the rod-shaped member, the optical fiber cable is unwound from the first reel and fed to the rod-shaped member along the feeding direction of the rod-shaped member, and is fed between the protective tape fed from the third reel to the rod-shaped member and the rod-shaped member; Fiber optic cable installation equipment.

6. An optical fiber cable installation method for fixing an optical fiber cable to a rod-shaped member that is delivered, and installing the optical fiber cable together with the rod-shaped member underground, comprising: a first reel around which the optical fiber cable is wound is rotatably provided on a mount; a second reel on which adhesive tape for fixing the optical fiber cable to the rod-shaped member is wound in a state covered with release paper is rotatably provided on the frame; The optical fiber cable is unwound from the first reel and fed to the rod-shaped member along the feeding direction of the rod-shaped member. The adhesive tape is unwound from the second reel and fed between the optical fiber cable fed to the rod-shaped member and the rod-shaped member. Fiber optic cable installation methods.

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