Optical cable laying method

Abstract

Provided is an optical cable laying method and laying tape, which can lay and remove an optical cable without accompanying civil engineering and in a stable place. The optical cable laying method of the present invention, in order to achieve the above object, lays an optical cable and two laying tapes on a road surface or a wall surface in a manner in which the optical cable is sandwiched between the side surfaces of the two laying tapes.

Description

TECHNICAL FIELD

[0001] The present application relates to an optical cable laying method. BACKGROUND

[0002] An optical cable is used as a transmission medium for information communication. In a case where an optical cable is laid, for example, in an outdoor environment, overhead wiring technology or underground wiring technology is used. The overhead wiring technology is a wiring technology in which a utility pole is erected on the ground in advance and an optical cable is erected on the utility pole. The underground wiring technology is a wiring technology in which a pipe is buried underground in advance and an optical cable is laid in the pipe.

[0003] Hitherto, in a case where a new optical cable is laid, the optical cable is often laid additionally in an area in which a metal cable for communication has already been laid. In this case, since a utility pole, a pipe, or the like infrastructure is already provided, the optical cable can be laid economically without accompanying new civil engineering. This is because a place where a communication demand is generated is the same as a place where a conventional metal cable is wired, and thus additional laying can be performed without newly constructing an infrastructure.

[0004] In recent years, in order to widely spread an antenna for a portable telephone and the like, it is also necessary to lay an optical fiber in an area in which an infrastructure has not been provided hitherto. In addition, although an infrastructure already exists, instead of wiring to a house, a building, or the like, new wiring is required to a structure such as a streetlight on a road. In this case, further provision of an infrastructure accompanies a large investment. In order to perform economical wiring of an optical cable, it is desirable to be able to lay an optical cable without accompanying civil engineering as much as possible.

[0005] In order to simplify civil engineering, an optical cable that can be directly buried without using a pipe has been proposed (for example, refer to Patent Literature 1). In addition, a method of cutting a groove in a road surface that is paved in advance and laying an optical cable in the groove has also been proposed (for example, refer to Non-Patent Literature 1).

[0006] PRIOR ART DOCUMENTS

[0007] PATENT LITERATURE

[0008] Patent Literature 1: Japanese Patent Publication No. 2017-198900

[0009] NON-PATENT LITERATURE

[0010] Non-Patent Literature 1: Strain Sensing of an In-Road FTTH Field Trial and Implications for Network Reliability, Proc. of IWCS (2019)

[0011] However, these methods require excavation of the ground to the length of the optical cable to be laid, or excavation of a road surface paved with asphalt, concrete, or the like, and such civil engineering is difficult to perform by hand and becomes a scale requiring heavy machinery.

[0012] Further, when the optical cable is laid, a connection for extension or branching of the optical cable is required. Such a connection is generally housed in a case such as a joint box. In the prior art, a certain space for housing such joint boxes is required when the optical cable is laid. Or in the case of lifting the optical cable from the ground to the surface, a space for protecting the lifting opening is required. These spaces must be prepared in advance before the optical cable is laid.

[0013] In order to cope with future connections or branching, excess length is required in the optical cable to be laid later. In order to protect the excess length of the optical cable, a case housing the excess length is also required. The case is provided on the ground, and thus becomes a major cause of obstruction to road traffic.

[0014] On the other hand, in order to ensure stable communication, the optical cable needs to be laid in a stable place. Further, in the case where the optical cable is not required, it is desirable that the optical cable can be removed without accompanying civil engineering as in the case of construction. SUMMARY

[0015] To solve the above problems, the present application aims to provide an optical cable laying method which can lay and remove an optical cable in a stable place without accompanying civil engineering. Further, the present application aims to provide a laying tape which can lay and remove an optical cable in a stable place without accompanying civil engineering.

[0016] To achieve the above objects, the optical cable laying method of the present application embeds an optical cable in at least two laying tapes laid on a road surface or a wall surface in a manner that the sides of the laying tapes contact the optical cable.

[0017] Specifically, the optical cable laying method of the present application lays an optical cable and two laying tapes in a manner that the sides of the two laying tapes sandwich the optical cable on a road surface or a wall surface.

[0018] In the optical cable laying method of the present application, a prevention mechanism that prevents the distance between the opposite sides of the two laying tapes from separating is applied.

[0019] For example, the application of the prevention mechanism can mean that, when the sides of the two laying tapes sandwiching the optical cable are made to face each other, portions of the sides of the two laying tapes each having a concave-convex shape other than the portions contacting the optical cable are engaged.

[0020] For example, the application of the prevention mechanism can mean that, when the sides of the two laying tapes sandwiching the optical cable are made to face each other, the leading ends of fixing nails are inserted across the sides of the two laying tapes.

[0021] In the optical cable laying method of the present application, a part of the laying tape can be cut off to form a space for accommodating a connection portion of an optical cable, a tray for arranging the connection portion can be provided at the bottom of the space, the optical cable can be introduced to the tray to form the connection portion when the optical cable is laid, and the open side of the space can be covered by a cover portion after the connection portion is accommodated in the tray.

[0022] In the optical cable laying method of the present application, a space for accommodating a connection portion of an optical cable can be formed in advance in the laying tape, a tray for arranging the connection portion can be provided at the bottom of the space when the laying tape is laid, the optical cable can be introduced to the tray to form the connection portion when the optical cable is laid, and the open side of the space can be covered by a cover portion after the connection portion is accommodated in the tray.

[0023] In the optical cable laying method of the present application, the laying tape can have a cutting line for forming a space for accommodating a connection portion of an optical cable, a space can be dug out using the cutting line when the laying tape is laid, a tray for arranging the connection portion can be provided at the bottom of the space after the space for arranging the connection portion is formed, the optical cable can be introduced to the tray to form the connection portion when the optical cable is laid, and the open side of the space can be covered by a cover portion after the connection portion is accommodated in the tray.

[0024] The laying tape of the present application can include a base layer portion having a flat side surface, and a surface layer portion formed on the base layer portion, having a concave-convex shape on the same side as the side surface, and having the same shape of a convex portion and a concave portion with respect to a plane including the flat surface.

[0025] In addition, each of the above inventions can be combined as much as possible.

[0026] According to the optical cable laying method of the present application, an optical cable can be laid and removed at a stable place without civil engineering. In addition, according to the laying tape of the present application, an optical cable can be laid and removed at a stable place without civil engineering. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a diagram illustrating a laying method of an optical cable.

[0028] Figure 2 is a diagram illustrating a laying method of an optical cable.

[0029] Figure 3 is a diagram illustrating a laying method of an optical cable.

[0030] Figure 4 is a diagram illustrating a laying method of an optical cable.

[0031] Figure 5 This is a diagram illustrating the method of laying optical cables.

[0032] Figure 6 This is a diagram illustrating the method of laying optical cables.

[0033] Figure 7 This is a diagram illustrating the method of laying optical cables.

[0034] Figure 8 This is a diagram illustrating the method of laying optical cables.

[0035] Figure 9 This is a diagram illustrating the method of laying optical cables.

[0036] Figure 10 This is a diagram illustrating the method of laying optical cables.

[0037] Figure 11 This is a diagram illustrating the method of laying optical cables.

[0038] Figure 12 This is a diagram illustrating the method of laying optical cables.

[0039] Figure 13 This is a diagram illustrating the method of laying optical cables.

[0040] Figure 14 This is a diagram illustrating the method of laying optical cables. Detailed Implementation

[0041] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown below. These embodiments are merely illustrative, and the present invention can be implemented in various ways with modifications and alterations based on the knowledge of those skilled in the art. Furthermore, in this specification and the accompanying drawings, the same reference numerals denote identical constituent elements.

[0042] (Implementation Method 1)

[0043] pass Figures 1 to 4 Examples illustrating the optical cable laying method of the present invention are provided. Figures 1 to 4 In the diagram, 11 and 12 are the laying strips, 21 is the road surface, and 22 is the optical cable.

[0044] Figure 1A laid tape 11 laid on a road surface 21 is shown. The laid tape 11 is preferably made of a material such as rubber or resin that has elasticity, so as to be able to smoothly cope with the unevenness of the road surface 21 and be able to absorb vibrations from the road surface 21. If the laid tape 11 is long and wound in a roll shape, it is easy to carry to the laying site. If the laid tape 11 is made short and in a brick shape, it is possible to carry in a stacked state. When the laid tape 11 is laid on the road surface 21, if it is fixed to the road surface 21 with an adhesive, the laid tape 11 is stabilized. In the present embodiment, of the four faces in the longitudinal direction that the laid tape 11 and the laid tape 12 described later have, the face with a narrow area is referred to as a side face. Or the face to which the optical cable 22 is close is referred to as a side face. Of the four faces in the longitudinal direction that the laid tape 11 and the laid tape 12 described later have, the face with a large area that is in contact with the road surface 21 is referred to as a bottom face, and the face opposite to the bottom face is referred to as an upper face.

[0045] Figure 2 An optical cable 22 laid so as to be close to one side face of the laid tape 11 is shown. In a case where the optical cable 22 is laid only beside the laid tape 11 without the optical cable 22 being close to the side face of the laid tape 11, it is also possible to temporarily fix the optical cable 22 to the side face of the laid tape 11 with a pin or a tape or an adhesive or the like that can be easily removed, thereby maintaining the state where the optical cable 22 is close to the side face of the laid tape 11.

[0046] Figure 3 A laid tape 12 laid so as to be close to the laid tape 11 and the optical cable 22 that are laid is shown. The laid tape 12 is preferably made of a material such as rubber or resin that has elasticity, so as to be able to smoothly cope with the unevenness of the road surface 21 and be able to absorb vibrations from the road surface 21. If the laid tape 12 is long and wound in a roll shape, it is easy to carry to the laying site. If the laid tape 12 is made short and in a brick shape, it is possible to carry in a stacked state. When the laid tape 12 is laid on the road surface 21, if it is fixed to the road surface 21 with an adhesive, the laid tape 12 is stabilized.

[0047] The laid tape 12 has a side face that is parallel to the side face of the laid tape 11 to which the optical cable 22 is close. The laid tape 12 is laid in a manner to sandwich the optical cable 22 in a state where the side face of the laid tape 11 and the side face of the laid tape 12 are parallel.

[0048] Figure 4 A state where the laid tape 11 and the laid tape 12 sandwich the optical cable 22 with the side face of the laid tape 11 and the side face of the laid tape 12 is shown. The laid tapes 11 and 12 are preferably made of a material that has elasticity, so as to close the sandwiched portion after the optical cable 22 is sandwiched.

[0049] If there is no obstacle at the place where the optical cable 22 is laid, the side surface of the laying tape 11 and the side surface of the laying tape 12 that sandwich the optical cable 22 are flat, and the optical cable 22 can be sandwiched in a straight line. On the other hand, in a case where there is an obstacle and the optical cable 22 cannot be laid in a straight line, the side surface of the laying tape 11 and the side surface of the laying tape 12 that sandwich the optical cable 22 are curved surfaces that are curved in the length direction, and by sandwiching the optical cable 22 in a curved line, the obstacle can be avoided. The above is the same not only in a case where the laying tapes 11 and 12 are laid on a road surface 21, but also in a case where they are laid on a wall surface (not shown).

[0050] In Figures 1 to 4 the explanation, after the laying tape 11 is laid on the road surface 21 or the wall surface, the optical cable 22 is laid and the laying tape 12 is laid, sandwiching the optical cable 22, but the optical cable 22 can also be laid after the laying tapes 11 and 12 are laid. The laying tapes 11 and 12 can also be laid on the road surface 21 or the wall surface simultaneously or one by one in a manner of sandwiching the optical cable 22 after the optical cable 22 is laid. The laying tapes 11 and 12 can also be laid together on the road surface 21 or the wall surface in a state of sandwiching the optical cable 22.

[0051] Furthermore, three or more laying tapes can also be laid. If a third laying tape is additionally laid, additional laying of the optical cable can be performed.

[0052] At the time of removing the optical cable 22, the laying tapes 11 and 12 are peeled from the road surface 21 or the wall surface (not shown). The laying tapes 11 and 12 can be peeled after the optical cable 22 is removed, or the laying tapes 11 and 12 can be peeled in a state of sandwiching the optical cable 22.

[0053] According to the optical cable laying method of the present embodiment, an optical cable laying method that does not involve civil engineering and that enables laying and removal of an optical cable at a stable place can be provided.

[0054] (Embodiment 2)

[0055] By Figures 5 to 9 Examples of the optical cable laying method of the present application will be described. In Figures 5 to 9 the explanation, 11 and 12 are laying tapes, 21 is a road surface, 22 is an optical cable, 31 is a base layer portion, 32 is a surface layer portion, and 33 is a fixing nail.

[0056] The laying tapes 11 and 12 are generally fixed to the road surface 21 or the wall surface with the side surfaces in contact with each other using an adhesive or the like, but in terms of the nature of sandwiching the optical cable 22, it can be considered that the side surfaces are separated from each other, and the optical cable 22 that is sandwiched is exposed. Therefore, the laying tapes 11 and 12 of the present embodiment apply a prevention mechanism that prevents the distance between the opposite side surfaces of the laying tapes 11 and 12 from separating to the laying tapes 11 and 12 of Embodiment 1.

[0057] The following describes two examples of the prevention mechanism, but the present application is not limited to these examples. As a first example, the application of the prevention mechanism can mean that, when the sides of the laying tapes 11, 12 that sandwich the optical cable 22 are brought into opposition, the portions of the opposite sides of the laying tapes 11, 12 that have the concave-convex shapes separately in addition to the portions in contact with the optical cable 22 are engaged.

[0058] The following describes the first example. Figure 5 and Figure 6 The laying tape 11 is shown as having a concave-convex side. The laying tapes 11, 12 are composed of a base layer portion 31 as a portion close to the bottom surface side and a surface layer portion 32 as a portion close to the upper surface side, and the base layer portion 31 and the surface layer portion 32 form a surface and a back. The side of the base layer portion 31 is a flat surface. In this example, this flat surface is referred to as a contact side. The side of the surface layer portion 32 on the same side as the contact side is a concave-convex shape, and the shape of the concave portion is the same as the shape of the convex portion with respect to the face including the contact side. In this example, the concave-convex side of the surface layer portion 32 is referred to as a concave-convex side.

[0059] The base layer portions 31 of the laying tapes 11 and 12 have a thickness that enables the laying tapes 11 and 12 to sandwich the entire optical cable 22 through the contact sides of the laying tapes 11 and 12. Furthermore, it is preferable that the laying tapes 11 and 12 have the same thickness so that the respective surface layer portions 32 are at the same height from the road surface 21 when the laying tapes 11 and 12 are laid.

[0060] It is preferable that the concave portion of the laying tape 11 and the convex portion of the laying tape 12 have the same shape so that, when the laying tape 11 and the laying tape 12 are laid with the concave-convex sides of the laying tapes 11 and 12 in opposition, the concave portion of the concave-convex side of the laying tape 11 engages with the convex portion of the concave-convex side of the laying tape 12. Furthermore, it is preferable that the convex portion of the laying tape 11 and the concave portion of the laying tape 12 have the same shape so that the convex portion of the concave-convex side of the laying tape 11 engages with the concave portion of the concave-convex side of the laying tape 12.

[0061] In order to engage the respective concave-convex sides when the laying tape 11 and the laying tape 12 are laid with the concave-convex sides in opposition, the respective concave portions and convex portions are arranged so that the concave portion of the laying tape 11 is located in front of the convex portion of the laying tape 12 and the convex portion of the laying tape 11 is located in front of the concave portion of the laying tape 12. For example, one end of the length direction of the concave-convex sides of the laying tape 11 and the laying tape 12 is aligned, and the laying tape 11 and the laying tape 12 are laid with the concave-convex sides in opposition.

[0062] To enable the convex and concave sides of the laying tape 11 to engage with the convex and concave sides of the laying tape 12, the convex and concave shapes of the laying tape 11 and the laying tape 12 simply repeat the pattern of being concave at one end and convex at the other end. The convex and concave portions of the laying tape 11 and the laying tape 12 can also be thicker at the front end to make the engagement difficult to disengage when they are engaged.

[0063] In this example, using the optical cable laying method of Embodiment 1, the optical cable 22 is clamped between the contact side of the laying tape 11 and the contact side of the laying tape 12. In this example, the optical cable laying method may also involve laying the optical cable 22 and the laying tape 12 after laying the laying tape 11 on the road surface 21 or wall surface, and then clamping the optical cable 22 so that the concave and convex sides of the laying tape 11 engage with the concave and convex sides of the laying tape 12. Alternatively, the concave and convex sides of the laying tape 11 may engage with the concave and convex sides of the laying tape 12 after laying the laying tapes 11 and 12 and then laying the optical cable 22. Alternatively, the concave and convex sides of the laying tape 11 may engage with the concave and convex sides of the laying tape 12 after laying the optical cable 22 and clamping the optical cable 22, respectively. When laying optical cable 22 and simultaneously laying laying tapes 11 and 12 on the road surface 21 or wall surface by clamping optical cable 22, the concave and convex sides of laying tape 11 can engage with the concave and convex sides of laying tape 12 after clamping optical cable 22, or the concave and convex sides of laying tape 11 can be engaged with the concave and convex sides of laying tape 12 beforehand, and then the optical cable 22 can be clamped from the base layer 31 side. When laying optical cable 22 together on the road surface 21 or wall surface with laying tapes 11 and 12 clamping it, the concave and convex sides of laying tape 11 can engage with the concave and convex sides of laying tape 12 at either the front or back of the laying process.

[0064] like Figure 7 and Figure 8 As shown, by engaging the concave and convex sides of the laying tape 11 with the concave and convex sides of the laying tape 12, separation of the contact side of the laying tape 11 and the contact side of the laying tape 12 can be prevented.

[0065] As a second example, applying the anti-clipping mechanism could mean that, when the sides of the laying strips 11 and 12 clamping the optical cable 22 are facing each other, the front end of the fixing nail is driven in such a way that it crosses the opposite sides of the laying strips 11 and 12. Figure 9 This describes a method of laying optical cables by inserting fixing nails 33 into the upper surfaces of the laying tapes 11 and 12 that clamp the optical cable 22.

[0066] In this example, the optical cable 22 is sandwiched by the opposite sides of the laying tapes 11 and 12 by the optical cable laying method of Embodiment 1. In the optical cable laying method of this example, the optical cable 22 can be laid and the laying tape 12 can be laid after the laying tape 11 is laid on the road surface 21 or the wall surface, and the fixing nails 33 can be stapled to the upper surfaces of the laying tapes 11 and 12 in a manner of straddling the opposite sides after the optical cable 22 is sandwiched. The fixing nails 33 can be stapled to the upper surfaces of the laying tapes 11 and 12 in a manner of straddling the opposite sides after the laying tapes 11 and 12 are laid and the optical cable 22 is laid. The fixing nails 33 can be stapled to the upper surfaces of the laying tapes 11 and 12 in a manner of straddling the opposite sides after the optical cable 22 is laid and the laying tapes 11 and 12 are laid one by one on the road surface 21 or the wall surface in a manner of sandwiching the optical cable 22. In the case where the optical cable 22 is laid and the laying tapes 11 and 12 are laid on the road surface 21 or the wall surface at the same time in a manner of sandwiching the optical cable 22, the fixing nails 33 can be stapled to the upper surfaces of the laying tapes 11 and 12 in a manner of straddling the opposite sides after the optical cable 22 is sandwiched, or the optical cable 22 can be sandwiched from the side opposite to the side where the fixing nails 33 are stapled after the fixing nails 33 are stapled to the upper surfaces of the laying tapes 11 and 12 in a manner of straddling the opposite sides in advance. In the case where the laying tapes 11 and 12 sandwich the optical cable 22 and they are laid on the road surface 21 or the wall surface together, the fixing nails 33 can be stapled to the upper surfaces of the laying tapes 11 and 12 in a manner of straddling the opposite sides at either one of before and after the laying.

[0067] By stapling the fixing nails 33 to the laying tapes 11 and 12, the opposite sides of the laying tapes 11 and 12 can be prevented from separating. In addition, the same effect can be obtained by using a tape or the like instead of the fixing nails 33.

[0068] According to the optical cable laying method of the present embodiment, an optical cable laying method that does not involve civil engineering and can lay and remove an optical cable at a stable place can be provided.

[0069] In addition, by applying a prevention mechanism that prevents the distance between the opposite sides of the laying tapes 11 and 12 from separating, the exposure of the optical cable 22 sandwiched by the laying tapes 11 and 12 can be prevented.

[0070] According to the laying tape of the present embodiment, an optical cable laying method that does not involve civil engineering and can lay and remove an optical cable at a stable place can be provided.

[0071] In addition, by applying a prevention mechanism that prevents the distance between the opposite sides of the laying tapes 11 and 12 from separating, the exposure of the optical cable 22 sandwiched by the laying tapes 11 and 12 can be prevented.

[0072] (Embodiment 3)

[0073] By Figures 10 to 14 An example of the optical cable laying method of the present application will be described. In Figures 10 to 14 , 11, 12 are laying tapes, 13 is a space, 14 is a tray, 15 is a cover portion, 16 is a cutout, 21 is a road surface, 22 is an optical cable, 23 is an optical fiber core, and 24 is a connecting portion.

[0074] Figure 10 A laying tape 11 laid on a road surface 21 is shown. The structure of the laying tape 11 and a laying tape 12 described later, and the laying method are the same as those of Embodiment 1 or Embodiment 2.

[0075] Figure 11 and Figure 12 A laying tape 11 showing a process of forming a space for housing a connecting portion of an optical cable is shown. As shown in Figure 11 , a cutout 16 for cutting a portion of the laying tape 11 is formed, and as shown in Figure 12 , the portion is cut along the cutout 16, and a space 13 for housing the connecting portion of the optical cable is formed. If the space 13 is configured so as to include a portion of a side surface of the laying tape 11 in the space 13, the connecting portion of the optical cable is easily housed because the optical cable 22 and the space 13 for housing the connecting portion are adjacent to each other when the optical cable 22 is sandwiched by the side surface and a side surface of another laying tape. In the case where the space 13 is formed in the center of the laying tape 11, a passage to the optical cable 22 of the space 13 needs to be formed separately because the optical cable 22 and the space 13 for housing the connecting portion are configured at separate positions when the optical cable 22 is sandwiched by the laying tape 11 and another laying tape. For example, cutting or the like needs to be performed. If the space 13 is formed after the laying tape 11 is laid on a road surface 21 or a wall surface (not shown), the space 13 of a desired shape can be formed at a desired position depending on the environment in which the laying tape 11 is laid.

[0076] In the description of Figures 10 to 12 , the space 13 is formed after the laying tape 11 is laid on a road surface 21 or a wall surface, but the laying tape 11 in which the space 13 is formed in advance can be laid on a road surface 21 or a wall surface. If the space 13 is formed in advance at a place where tools and the environment are complete, the space 13 can be easily formed.

[0077] Further, the laying tape 11 can also have a cut line for forming the space 13 for housing the connecting portion of the optical cable in advance. When the laying tape 11 is laid, the space 13 is easily formed by digging out the space 13 using the cut line.

[0078] A new space 13 can also be formed additionally on the laying tape 11 in which the space 13 is formed. If the new space 13 is formed additionally, additional laying of the optical cable and additional housing of the connecting portion can be performed.

[0079] Figures 13 to 14Indicates the state in which the connection portion is housed in the laying tape 11. In Figure 13 In the above embodiment, the laying tape, the optical cable, the tray, and the like are configured by members having a thickness of about 1 cm, and are designed to have appropriate mechanical properties so as not to be damaged by being stepped on, and the like. Thus, the wiring that does not cause an obstacle on the road surface and does not cause an obstacle to the passage as much as the wiring buried in the ground or erected in the air can be economically constructed.

[0080] In Figure 13 In the above embodiment, the laying tape, the optical cable, the tray, and the like are configured by members having a thickness of about 1 cm, and are designed to have appropriate mechanical properties so as not to be damaged by being stepped on, and the like. Thus, the wiring that does not cause an obstacle on the road surface and does not cause an obstacle to the passage as much as the wiring buried in the ground or erected in the air can be economically constructed.

[0081] In the above embodiment, the laying tape, the optical cable, the tray, and the like are configured by members having a thickness of about 1 cm, and are designed to have appropriate mechanical properties so as not to be damaged by being stepped on, and the like. Thus, the wiring that does not cause an obstacle on the road surface and does not cause an obstacle to the passage as much as the wiring buried in the ground or erected in the air can be economically constructed.

[0082] In Figure 14 In the above embodiment, the laying tape, the optical cable, the tray, and the like are configured by members having a thickness of about 1 cm, and are designed to have appropriate mechanical properties so as not to be damaged by being stepped on, and the like. Thus, the wiring that does not cause an obstacle on the road surface and does not cause an obstacle to the passage as much as the wiring buried in the ground or erected in the air can be economically constructed.

[0083] In the above embodiment, the laying tape, the optical cable, the tray, and the like are configured by members having a thickness of about 1 cm, and are designed to have appropriate mechanical properties so as not to be damaged by being stepped on, and the like. Thus, the wiring that does not cause an obstacle on the road surface and does not cause an obstacle to the passage as much as the wiring buried in the ground or erected in the air can be economically constructed.

[0084] In the above embodiment, the laying tape, the optical cable, the tray, and the like are configured by members having a thickness of about 1 cm, and are designed to have appropriate mechanical properties so as not to be damaged by being stepped on, and the like. Thus, the wiring that does not cause an obstacle on the road surface and does not cause an obstacle to the passage as much as the wiring buried in the ground or erected in the air can be economically constructed.

[0085] According to the optical cable laying method of the present embodiment, an optical cable laying method that does not involve civil engineering and can lay and remove an optical cable in a stable place can be provided.

[0086] Industrial applicability

[0087] The optical cable laying method of the present application can be applied to the information communication industry.

[0088] Explanation of reference numerals

[0089] 11, 12: Laying tape

[0090] 13: Space

[0091] 14: Tray

[0092] 15: Cover portion

[0093] 16: Slit

[0094] 21: Road surface

[0095] 22: Optical cable

[0096] 23: Optical fiber core wire

[0097] 24: Connection portion

[0098] 31: Base layer portion

[0099] 32: Surface layer portion

[0100] 33: Fixing nail

Claims

1. An optical cable laying method characterized by, laying an optical cable and two laying tapes on a road surface or a wall surface in a manner that the optical cable is sandwiched by the sides of the two laying tapes, applying a prevention mechanism that prevents the distance between the opposite sides of the two laying tapes from separating, applying the prevention mechanism involves engaging portions of the sides of the two laying tapes that have a concave-convex shape in addition to the portions that are in contact with the optical cable when the sides of the two laying tapes that sandwich the optical cable are made to face each other.

2. The optical cable laying method according to claim 1, characterized by, when laying the laying tapes, cutting out a portion of the laying tapes to form a space that accommodates a connection portion of the optical cable, providing a tray that arranges the connection portion at the bottom of the space, when laying the optical cable, introducing the optical cable into the tray to form the connection portion, covering the open side of the space with a cover portion after the connection portion is accommodated in the tray.

3. The optical cable laying method according to claim 1, characterized by, the laying tapes are pre-formed with a space that accommodates a connection portion of the optical cable, when laying the laying tapes, providing a tray that arranges the connection portion at the bottom of the space, when laying the optical cable, introducing the optical cable into the tray to form the connection portion, covering the open side of the space with a cover portion after the connection portion is accommodated in the tray.

4. The optical cable laying method according to claim 1, characterized by, the laying tapes have a cutting line for forming a space that accommodates a connection portion of the optical cable, when laying the laying tapes, excavating a space using the cutting line, after the space that arranges the connection portion is formed, providing a tray that arranges the connection portion at the bottom of the space, when laying the optical cable, introducing the optical cable into the tray to form the connection portion, covering the open side of the space with a cover portion after the connection portion is accommodated in the tray.

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