JP2018078766A - Cable protector and pedestrian guide system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable protector which guides pedestrians and a pedestrian guide system.SOLUTION: A pedestrian guide system includes a portable device and a cable protector 30. The portable device has a proximity wireless communication part, a control part, and a microphone. The cable protector 30 has a protection housing 31 and an IC chip 40. The protection housing 31 includes: a second body 35 provided with a maintenance window 39; and a detachable lid 50 which opens or closes the maintenance window 39. The lid 50 has a recessed part into which the IC chip 40 is fitted. After the IC chip 40 is fitted in the recessed part, an electromagnetic shield member is attached to the IC chip 40. Further, an attachment plate is attached to the lid 50. The electromagnetic shield member shields electromagnetic waves emitted from a cable to protect the IC chip 40 from the electromagnetic waves.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cable protector that surrounds and protects cables such as a power transmission cable and a communication cable, and a pedestrian guidance system.

  A cable protector that surrounds and protects a cable such as a power transmission cable or a communication cable is known (for example, see Patent Document 1). The cable protector is buried in the ground together with the cable or laid on the ground surface. The cable protector protects the cable from water and soil.

Japanese Patent No. 5814453

  In recent years, it has been desired to provide facilities on a sidewalk or the like to safely guide elderly people and pedestrians who are blind. On the other hand, some cables (cable protectors) are installed along a sidewalk. Then, this inventor considered performing the safe guidance of a pedestrian using the cable protector installed along a sidewalk.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a cable protector and a pedestrian guidance system capable of easily constructing equipment for safely guiding pedestrians.

  (1) A cable protector according to the present invention includes a cylindrical protective housing having an insertion hole through which a cable is inserted, and an IC chip that is provided in the protective housing and performs proximity wireless communication.

  The cable protector is buried in the ground along the sidewalk together with the cable, or is laid on the ground surface. The cable protector protects the inserted cable from water, dust and dirt. The IC chip is provided in a protective housing and is protected from water, dust, dirt, and the like together with the cable. The presence of the IC chip is detected in a communication device held by a pedestrian through proximity wireless communication. That is, the IC chip informs the pedestrian of the existence of the sidewalk. For example, when the pedestrian goes off the sidewalk, the IC chip is not detected by the communication device. As a result, the cable protector (IC chip) can make the pedestrian recognize that the cable protector (IC chip) has come off the sidewalk.

  (2) The cable protector according to the present invention may include an electromagnetic shield member at a position between the IC chip and the cable.

  The cable protected by the cable protector is a power transmission cable or a communication cable. Depending on the type of cable, strong electromagnetic waves are emitted from the cable. The electromagnetic shielding member shields the electromagnetic wave radiated from the cable and protects the IC chip from the electromagnetic wave.

(3) The protective housing includes a maintenance window for exposing the cable,
A resin lid for closing the maintenance window may be provided. The IC chip is disposed inside the lid.

  The cable protector is installed with the maintenance window and lid facing up. The IC chip is provided on the lid. Therefore, the cable protector can be installed in the operator with the IC chip facing up without having the operator confirm the position of the IC chip. As a result, installation work of the cable protector can be facilitated.

  Further, since the lid is opened and closed with respect to the main body, the IC chip can be replaced by opening the lid. Therefore, the worker can easily perform the maintenance work.

  Further, since the IC chip is disposed inside the lid, the IC chip can be protected from dirt, water, and dust.

  (4) The cable protector according to the present invention may include an electromagnetic shield member disposed inside the lid, and a mounting plate that sandwiches the electromagnetic shield member together with the lid.

  By sandwiching the electromagnetic shield member between the mounting plate and the lid, the electromagnetic shield member can be reliably held.

  (5) The protective housing may include a first half and a second half that are attached to each other. The first half has a first flange. The second half has a second flange secured to the first flange. At least one of the first flange and the second flange has a recess into which the IC chip is fitted.

  The first half and the second half are attached to each other together with the first flange and the second flange. The IC chip is fitted into a fitting recess provided in one or both of the first flange and the upper second flange. Therefore, protection and fixing of the IC chip can be performed with a simple configuration. Moreover, since it only forms a recessed part, it can respond only by correction of the existing metal mold | die.

  (6) The protective housing may include a maintenance window that exposes the cable and a lid that closes the maintenance window, and the lid may include an antenna that is electrically connected to the IC chip.

  The antenna is, for example, a loop antenna or a pole antenna. The antenna is formed by, for example, a conductive wire or a pattern foil. By providing the antenna, the reception sensitivity of the IC chip is increased.

  (7) The protective housing may include a wiring hole through which a connection line having one end connected to the IC chip and the other end connected to the antenna is inserted.

  When the cable protector is buried deep in the ground, the antenna installed on the ground surface and the IC chip of the cable protector are connected by a connection line.

  (8) The cable protector according to the present invention includes a photoelectric element that converts light into current, a storage element that stores current converted by the photoelectric element, a drive circuit that uses the storage element as a drive source, and the drive And a light emitting diode that is turned on by a circuit.

  When the cable protector is laid on the ground surface, the current generated by the photoelectric element is stored in the storage element. The stored current turns on the light emitting diode at night. Pedestrians can be recognized by the light from the light emitting diodes.

  (9) The protective housing may include a maintenance window that exposes the cable and a lid that closes the maintenance window. The photoelectric element is disposed on an outer surface of the lid, the power storage element, the drive circuit, and the light emitting diode are disposed in the protective housing, and the lid includes a display window that allows the light emitting diode to be visually recognized. And a translucent sheet covering the display window.

  (10) The IC chip may have position information.

  The IC chip conveys position information of the installation location where the cable protector is installed to the pedestrian.

  (11) The protective housing includes one end portion and the other end portion, and includes a tube main body through which a cable is inserted and a connection body externally fitted to the tube main body. One end portion and the other end portion of the other end may be fitted and connected via the connection body to surround a long cable. The other end portion and one end portion of the tube main body are provided with a female receiving portion and a male insertion portion formed so as to be able to fit in an elastic and liquid tight manner corresponding to the female receiving portion. . A male screw is formed on the outer peripheral surface of the female receiving part, and the connection body has a female screw corresponding to the male screw. The female receiving part is in a state in which the male insertion part is fitted to the female receiving part of the adjacent pipe body and the connection body is screwed into a male screw formed in the female receiving part. And a stopper for restricting tightening of the connection body at a predetermined position. The male insertion port portion is in contact with a predetermined portion of the connection body and the male mold in a state in which the connection body is restricted from being tightened by a stopper provided in the female reception port portion of the adjacent pipe body. The insertion opening has a displacement guide for allowing flex pivot displacement with respect to the female receiving part of the adjacent pipe body. A guide curved surface formed of a part of a spherical surface that abuts each other and guides the flex pivot displacement is formed on the predetermined portion of the connection body and the displacement guide portion, and the center of the guide curved surface is one end of the pipe body. The projected length in the axial direction of the tube main body of the virtual line segment that is located on the axial line on the part side and connects the normal line of the guide curved surface and the center is the radial direction of the tube main body of the virtual line segment. It is arrange | positioned so that it may become larger than projection length of. A first elastically deformable O-ring is mounted on the outer peripheral surface of the male insertion slot. The outer diameter of the first O-ring is set larger than the inner diameter of the female receiving portion of the adjacent pipe body. A second O-ring that can be elastically deformed is disposed so as to protrude from the end face of the male insertion slot.

  Since a cable laid or buried in a road or the like is generally long, a plurality of cable protectors are connected as follows to surround the cable.

  The male insertion port of one tube body is fitted elastically and liquid tightly into the female receiving port of the other tube body. That is, since the first O-ring is mounted on the outer peripheral surface of the male insertion port portion, the first O-ring is elastically deformed to the inner wall surface of the female receiving port portion of the adjacent tube body. Pressed. At the same time, since the second O-ring is arranged so as to protrude from the end face of the male insertion slot, the second O-ring is elastically deformed and pressed against the female receptacle. That is, the space between the female receptacle and the male insertion slot is waterproof, and the male insertion slot can be elastically displaced with respect to the female receptacle.

  In this state, the female screw of the connecting body provided in one pipe body is screwed into the male screw provided in the female receiving portion of the adjacent pipe body (that is, the other pipe body). When this connection body is tightened and brought into contact with a stopper provided in the female receptacle of the other pipe body, tightening of the connection body is regulated by the stopper, and at this time, the connection body The predetermined portion is in contact with a displacement guide portion provided in the male insertion port portion of one of the tube main bodies. Since the tightening of the connection body is restricted, the connection body is in contact with the displacement guide portion with a predetermined pressing force. That is, since this pressing force does not become excessive, the flex-pivot displacement of the male insertion port of one tube body is possible with respect to the female receiving port of the other tube body.

  The flex pivot displacement is performed by sliding the guide curved surface of the connection body and the guide curved surface of the displacement guide portion. These guide curved surfaces are spherical surfaces, and the position of the center thereof exists on the axis on the one end side of the tube main body, and the imaginary line segment connecting the normal line of the guide curved surface and the center of the tube main body. The projection length in the axial direction is set to be larger than the projection length in the radial direction of the tube main body of the virtual line segment. That is, the flex pivot displacement of the male insertion port portion inevitably becomes very gradual with respect to the female receiving port portion. If an external force is applied between the two, flex pivot displacement occurs accordingly, and the first and second O-rings are also deformed. When the external force is removed, the first and second The flex pivot displacement is restored by the elasticity of the O-ring. As a result, the external force acting on the adjacent cable protectors is absorbed, and damage to one or both of the male insertion port and the female receiving port is suppressed.

  When the embedment depth is small, the structural strength required for the cable protector is low, and it is sufficient if it can be easily deformed while ensuring liquid tightness against a relatively small external force. It is preferably used when the embedding depth is small. The cable protector does not require a casing as compared to the conventional one, and has a simple structure and excellent workability and economy compared to the conventional cable protector.

(12) A pedestrian guidance system according to the present invention includes the cable protector described above and a portable device. The portable device includes a proximity wireless communication unit that performs proximity wireless communication with the IC chip, a control unit that receives a reply response from the IC chip, and a notification unit that performs notification. The said control part controls operation | movement of the said alerting | reporting part by the said reply response, and guides the pedestrian who is the holder of the said portable apparatus.

  For example, the control unit confirms the existence of the sidewalk and the current position based on a response from the IC chip. A control part alert | reports according to presence and the present position of the confirmed sidewalk, and guides a pedestrian.

  (13) The notification unit may be a microphone that generates sound. The control unit determines whether the pedestrian is off the road from the reply response, and determines whether the pedestrian is off the road in the determination process. A notification process for generating a warning sound is executed.

  The control unit recognizes the presence of the IC chip, the current position, and the walking route from the reply response. The control unit determines whether or not the pedestrian of the portable device has left the sidewalk based on the presence of the IC chip, the current position, the walking route, and the like. When the control unit determines that the pedestrian has come off the sidewalk, the control unit notifies the pedestrian to that effect by a warning sound. As a result, a pedestrian can be safely guided.

  (14) The notification unit may be a microphone that generates sound, and the control unit may generate a detection sound in the microphone on condition that the reply response is input.

  If the pedestrian goes off the road, the portable device will not receive a reply response. If it does so, the detection sound which has arisen until then will be interrupted. Therefore, it is possible to make the pedestrian recognize that he / she is off the sidewalk. As a result, a pedestrian can be safely guided.

  According to the present invention, it is possible to provide a cable protector and a pedestrian guidance system that can easily construct equipment for safely guiding pedestrians.

FIG. 1 is a configuration diagram of a pedestrian guidance system 10 according to the first embodiment. FIG. 2 is a perspective view of the cable protector 30 according to the first embodiment. FIG. 3 is an exploded perspective view of the cable protector 30 according to the first embodiment. FIG. 4 is a cross-sectional view of the lid 50 in the first embodiment. FIG. 5 is a flowchart of the determination / notification process 1 in the first embodiment. FIG. 6 is an exploded perspective view of the cable protector 30 according to the second embodiment. FIG. 7 is a cross-sectional view of the cable protector 30 according to the second embodiment. FIG. 8 is a perspective view of the lid 57 in the first modification. FIG. 9A is a cross-sectional view of the lid 70 according to the second modification, FIG. 9B is an exploded cross-sectional view of the lid 70, and FIG. 9C is a perspective view of the substrate 71. FIG. 10 is a flowchart of the determination / notification process 2 in the fourth modification. FIG. 11 is a block diagram of the first embodiment, the second modification, and the fourth modification. FIG. 12 is a perspective view of the cable protector 110 according to the third embodiment. FIG. 13 is a longitudinal sectional view of the first main body 34 </ b> A and the connection body 60. FIG. 14A is a longitudinal sectional view in which a part of the male insertion slot 13 is enlarged, and FIG. 14B is a longitudinal sectional view in which a part of the female receptacle 12 is enlarged. FIG. 15A and FIG. 15B are perspective views showing a state in which the connection body 60 is disassembled with respect to the pair of first main bodies 34A fitted and connected in the third embodiment. FIG. 16 is a vertical cross-sectional view of a connecting portion in a state where adjacent first main bodies 34A in the third embodiment are connected to each other. FIG. 17 is an enlarged vertical cross-sectional view of a part of a connecting portion between adjacent first main bodies 34A in the third embodiment. FIG. 18 is a longitudinal sectional view of the second main body 35A in the third embodiment. FIG. 19 is an enlarged longitudinal sectional view of a part of the second main body 35A in the third embodiment. FIG. 20 is a perspective view of a cylinder 11D provided in the second main body 35A in the third embodiment. FIG. 21 is a longitudinal sectional view of the first main body 34A in the fifth modification. 22A to 22D are side views of pipe joints 140A to 140D used as the first pipe body 11C of the first body 34A. FIG. 23A is a perspective view of the cable protector 112 according to the fourth embodiment, and FIG. 23B is an exploded perspective view of the protective housing 90 according to the fourth embodiment.

  [First embodiment]

  As shown in FIG. 1, the pedestrian guidance system 10 includes a portable device 20 carried by a pedestrian and a cable protector 30 laid on the ground or on the ground surface. The cable protector 30 is buried in a relatively shallow position (depth of about 30 cm or less) in the ground or laid on the ground surface. In the illustrated example, the cable protector 30 is buried in the ground. The cable protector 30 protects the cable 32 from soil and water. The cable 32 is a power transmission cable, a communication cable such as an optical fiber, or the like.

  The cable protector 30 includes a plurality of IC chips 40 that perform close proximity wireless communication, and performs close proximity wireless communication with the mobile device 20. The portable device 20 performs proximity wireless communication with the IC chip 40 to guide the pedestrian. A detailed description will be given below.

  As shown in FIG. 2, the cable protector 30 includes a protective housing 31 and an IC chip 40 provided on the protective housing 31. The protective housing 31 is cylindrical and has an insertion hole 33 through which the cable 32 is inserted. The cable protector 30 protects the inserted cable 32 from soil and water.

  As shown in FIG. 3, the protective housing 31 is assembled by a resin-made first main body 34, second main body 35, and connection body 36. The connection body 36 is a member that connects the two first main bodies 34, the two second main bodies 35, and the first main body 34 and the second main body 35. The protective housing 31 is assembled by connecting a plurality of first main bodies 34 and a plurality of second main bodies 35 with connecting bodies 36. The number of the first main body 34 and the second main body 35 to be used is changed depending on the length of the cable 32.

  The first main body 34 is cylindrical. The second main body 35 includes a cylindrical tube portion 37 having substantially the same diameter as the first main body 34 and a box-shaped box portion 38 provided at the center of the tube portion 37. The connection body 36 has a cylindrical shape with an inner diameter that can be fitted onto the first main body 34 and the second main body 35.

  For example, the first main body 34 and the second main body 35 are coupled by providing male and female screw grooves on the inner peripheral surface of the connection body 36 and the outer peripheral surfaces of the first main body 34 and the second main body 35. Sealing members such as packing may be disposed on the contact surfaces of the first main body 34, the second main body 35, and the connection body 36 for waterproofing and dustproofing. In addition, the connection method of the 1st main body 34 and the 2nd main body 35 by the connection body 36 is not restricted to using a screw, Adhesive may be used, and what is called snap fitting using elasticity is used. Also good.

  The box part 38 of the second main body 35 is formed integrally with the cylinder part 37 at the center of the cylinder part 37. The box portion 38 has a rectangular parallelepiped shape having a maintenance window 39 on the upper surface. The maintenance window 39 exposes the cable 32 in the protective housing 31. The operator repairs or replaces the cable 32 through the maintenance window 39.

  The maintenance window 39 is closed by the lid 50 except during maintenance. The lid 50 is attached to the maintenance window 39 in a detachable (openable and closable) manner using bolts 43, nuts 44, and mounting brackets 45. More specifically, the lid 50 has a rectangular plate shape that is substantially the same size as the maintenance window 39. The lid 50 includes projecting pieces 51 that project from a pair of opposing peripheral edges. In the illustrated example, a total of six projecting pieces 51 are provided, three on each side. Each protruding piece 51 includes an insertion hole 52 through which the bolt 43 is inserted.

  The mounting bracket 45 is substantially U-shaped. For example, the mounting bracket 45 is formed by bending a metal material. The mounting bracket 45 includes flanges 46 at both ends. Each flange 46 includes an insertion hole 47 through which the bolt 43 is inserted.

  The bolt 43 is inserted into the insertion hole 52 of the lid 50, inserted into the insertion hole 47 of the mounting bracket 45 disposed below the second main body 35, and finally screwed into the nut 44. As a result, the lid 50 is attached to the second main body 35 with the maintenance window 39 closed.

  As shown in FIG. 4, the lid 50 is provided with an IC chip 40 and an electromagnetic shield member 48. The electromagnetic shield member 48 is a rectangular sheet having substantially the same shape as the lid 50. For example, the electromagnetic shield member 48 includes a base material, a metal foil attached to one surface of the base material, and an adhesive layer attached to the other surface of the base material. The metal foil is formed using a metal such as aluminum that can shield electromagnetic waves. That is, the electromagnetic shield member 48 shields electromagnetic waves.

  The IC chip 40 and the electromagnetic shield member 48 are attached to the lid 50 using the mounting plate 53. More specifically, the lid 50 is made of a resin that transmits radio waves. The lid 50 is provided with a recess 54 in the center of which the IC chip 40 is fitted. The recess 54 opens to the inside of the box portion 38 (on the cable 32 side). The lid 50 includes a screw hole 55 into which the screw 49 is screwed. In the illustrated example, the screw holes 55 are provided on both sides of the recess 54. The screw-in hole means a hole provided with a screw groove or a so-called self-tap hole in which a screw groove is formed by the screw 49 itself.

  On the other hand, the mounting plate 53 is a resin-made rectangular plate having substantially the same shape as the lid 50. The mounting plate 53 includes an insertion hole 56 through which the screw 49 is inserted. The insertion hole 56 is provided at a position corresponding to the screw-in hole 55 of the lid 50.

  After the IC chip 40 is fitted in the concave portion 54 of the lid 50, the electromagnetic shield member 48 is disposed on the opening side of the concave portion 54, the mounting plate 53 is further disposed on the electromagnetic shield member 48 side, and the mounting plate 53 is attached by the screw 49. Attach to lid 50. As a result, the IC chip 40 and the electromagnetic shield member 48 are attached to the lid 50.

  The lid 50 is attached to the maintenance window 39 of the second main body 35 with the attachment plate 53 inside (cable 32 side). Therefore, the electromagnetic shield member 48 is located between the IC chip 40 and the cable 32. The electromagnetic shield member 48 shields the electromagnetic wave emitted by the cable 32 and protects the IC chip 40 from the electromagnetic wave.

  Next, the portable device 20 will be described. As illustrated in FIG. 11, the mobile device 20 includes a proximity wireless communication unit 21 that performs proximity wireless communication with the IC chip 40, a control unit 22, and a microphone 23. The near field communication unit 21 is a so-called reader that communicates with the IC chip 40 according to, for example, the NFC communication standard.

  The IC chip 40 receives the radio wave transmitted by the proximity wireless communication unit 21 and returns a reply response. The close proximity wireless transfer unit 21 receives a reply response from the IC chip 40 and inputs the received reply response to the control unit 22.

  The microphone 23 is a notification unit that converts an input audio signal into a sound, and generates a warning sound or the like.

  The control unit 22 is, for example, a microcomputer, and performs various calculations and output of audio signals. The control unit 22 receives the above reply response from the close proximity wireless transfer unit 21. The control part 22 performs the judgment and alerting | reporting process 1 shown by FIG. 5 using the input reply response, and guides a pedestrian. The details will be described below.

  The control unit 22 waits until a reply response is input (S11: No). When a reply response is input (S11: Yes), the controller 22 starts measuring time using a timer counter (not shown) (S12). The control unit 22 resets the timer counter and restarts the time measurement every time a new reply response is input (S13: Yes). The control unit 22 monitors the input of a new reply response until the measurement time reaches a predetermined time (S13: No & S14: No). Whether or not the measurement time has reached a predetermined time is determined by whether or not the count value of the timer counter is equal to or greater than a predetermined threshold value.

  When the measurement time reaches a predetermined time (S14: Yes), the control unit 22 outputs an audio signal to the microphone 23, generates a warning sound in the microphone 23 (S15), and ends the determination / notification process 1.

  The control unit 22 performs pedestrian guidance by executing the determination / notification process 1 described above. More specifically, the pedestrian walks with the portable device 20. The pedestrian turns on the guidance function of the portable device 20. When the guidance function is turned on, the control unit 22 executes the determination / notification process 1.

  When a pedestrian walks on the sidewalk where the cable protector 30 is laid, communication is performed between the portable device 20 and the IC chip 40 of the cable protector 30, and a reply response is input to the control unit 22. The control unit 22 recognizes that the pedestrian is on the sidewalk when the reply response is input. When there is no new reply response within a predetermined time after the reply response is input, the control unit 22 determines that the pedestrian has left the sidewalk and causes the microphone 23 to generate a warning sound.

  In the first embodiment, since the IC chip 40 is originally provided on the cable protector 30 laid on the ground or on the ground surface, the IC chip 40 can be easily installed. As a result, equipment for safely guiding pedestrians can be easily constructed.

  Further, since the electromagnetic shield member 48 is provided between the IC chip 40 and the cable 32, the IC chip 40 can be protected from electromagnetic waves radiated from the cable 32.

  Further, since the IC chip 40 is disposed inside the lid 50, the IC chip 40 can be protected from water, dirt, dust, and the like.

  Further, since the IC chip 40 is always disposed on the lid 50 on the upper side, the cable protector 30 can be installed on the operator with the IC chip 40 facing upward without making the operator aware of it. As a result, the installation work of the cable protector 30 is facilitated.

  Further, since the IC chip 40 is provided on the detachable (openable and closable) lid 50, the IC chip 40 can be newly provided on the already installed cable protector 30 by replacing the lid 50. Also, maintenance work such as replacement of the IC chip 40 can be easily performed by the operator. As a result, the pedestrian guidance system 10 can be easily constructed.

  Further, in the determination / notification process 1, since a warning sound is generated when the pedestrian goes off the sidewalk, the pedestrian can be safely guided.

  [Second Embodiment]

  In the first embodiment, the configuration in which the IC chip 40 and the electromagnetic shield member 48 are provided on the lid 50 has been described. In the second embodiment, as shown in FIG. 6, a configuration in which an IC chip 40 and an electromagnetic shield member 48 are provided on the connection body 60 will be described. The configurations of the first main body 34 and the second main body 35 are the same as those in the first embodiment except that the IC chip 40 is not provided on the lid 50. Moreover, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The connection body 60 has the same outer shape as the connection body 36. The connection body 60 includes a first half body 61 and a second half body 62 that are formed by equally dividing the connection body 60 along the axial direction. The first half 61 and the second half 62 are made of resin and have substantially the same shape.

  The first half 61 and the second half 62 are coupled using a bolt and a nut (not shown). More specifically, the first half 61 includes first flanges 63 at both ends in the circumferential direction. In FIG. 6, the first flange 63 on only one side appears. The first flange 63 has an insertion hole 64 through which a bolt is inserted. In the illustrated example, three insertion holes 64 are provided in the two first flanges 63, respectively.

  On the other hand, the second half 62 includes second flanges 65 at both ends in the circumferential direction. The second flange 65 has a bolt hole 66 through which a bolt is inserted. The bolt hole 66 is provided at a position corresponding to the insertion hole 64. After the bolt is inserted into the insertion hole 64, the bolt is inserted into the bolt hole 66 and finally screwed into the nut. As a result, the first half 61 and the second half 62 are joined.

  The first flange 63 of the first half 61 includes a recess 67 into which the IC chip 40 is fitted. The recess 67 opens to the contact surface side with the second flange 65. After the IC chip 40 is fitted in the recess 67, the first half 61 and the second half 62 are coupled, whereby the IC chip 40 is held by the connection body 60. Note that the recess 67 may be provided in the second flange 65. Further, the recess 67 may be provided in both the first flange 63 and the second flange 65.

  As shown in FIG. 7, the electromagnetic shield member 48 is disposed between the first main body 34 and the second main body 35 and the connection body 60. The electromagnetic shield member 48 is held by being sandwiched between the first body 34 and the second body 35 and the connection body 60. The electromagnetic shield member 48 arranged in this way is located between the IC chip 40 and the cable 32. Therefore, the electromagnetic shield member 48 shields the electromagnetic wave emitted by the cable 32 and protects the IC chip 40 from the electromagnetic wave. The electromagnetic shield member 48 may be attached to the inner peripheral surfaces of the first main body 34 and the second main body 35.

  In the second embodiment, since the IC chip 40 is sandwiched between the first half 61 and the second half 62 to be joined, the IC chip 40 can be held and protected without using an attachment member. Further, since only the recess 67 is formed, the IC chip 40 can be attached to the conventional cable protector only by modifying the existing mold.

  [Modification 1]

  In the first modification, a configuration in which an antenna 42 (FIG. 8) that increases the reception sensitivity of the IC chip 40 is further provided in the first embodiment will be described. In addition, in this modification 1, since it is the same as that of 1st Embodiment except the cover 57 being used instead of the cover 50 in 1st Embodiment, description of structures other than the cover 57 is abbreviate | omitted. Furthermore, in the cover 57, the same code | symbol is attached | subjected about the structure same as the cover 50 demonstrated in 1st Embodiment, and description is abbreviate | omitted.

  As shown in FIG. 8, the lid 57 is a rectangular plate having the same shape as the lid 50, and includes a protruding piece 51, a recessed portion 54, and a screw hole 55. The lid 57 further includes a first groove 58 and a second groove 59 in which the antenna 42 is disposed.

  The first groove 58 is a groove extending linearly from the recess 54 toward the periphery of the lid 57. The second groove 59 is a substantially circular groove extending along the periphery of the lid 57. The first groove 58 and the second groove 59 are coupled.

  The antenna 42 is formed by a conducting wire such as an enameled wire or a copper wire. Both ends of the antenna 42 are connected to the IC chip 40 and are fitted into the first groove 58 and the second groove 59. That is, the antenna 42 is a so-called loop antenna.

  After the IC chip 40 is fitted into the recess 54 and the antenna 42 is fitted into the first groove 58 and the second groove 59, the electromagnetic shield member 48 is disposed, and the attachment plate 53 is attached to the lid 57. As a result, the IC chip 40, the antenna 42, and the electromagnetic shield member 48 are attached to the lid 57.

  In the first modification, the reception sensitivity of the IC chip 40 is increased by the antenna 42.

  In the first modification, an example in which the antenna 42 is a loop antenna has been described. However, the antenna may be another type of antenna such as a pole antenna.

  In the first modification, an example in which the antenna 42 is formed of a conductive wire has been described. However, the antenna 42 may be formed of a pattern foil. For example, the antenna 42 may be formed by a pattern foil deposited on the mounting plate 53.

  In the first modification, the example in which the IC chip 40 and the antenna 42 are provided on the lid 57 has been described. However, for example, a lid 57 (without the IC chip 40) is provided on the second main body 35 in the second embodiment, and the IC chip 40 provided on the connection body 60 and the antenna 42 provided on the lid 57 are connected by a connection line. It may be connected.

  In the first modification, the configuration in which the antenna 42 is provided on the lid 57 has been described. However, the antenna may be installed on the ground surface, and the antenna installed on the ground surface and the IC chip 40 may be connected by a connection line. . In this case, the wiring hole 73 shown in FIGS. 9A and 9B is provided in the lid 50, and the connection line is inserted through the wiring hole 73.

[Modification 2]

  In the second modification, a configuration in which a so-called solar cell is provided on the cable protector 30 will be described. The second modification is the same as the first embodiment except that the lid 70 and the substrate 71 shown in FIG. 9 are used instead of the lid 50 and the mounting plate 53 shown in FIG. 4 in the first embodiment. Therefore, description of components other than the lid 70 and the substrate 71 is omitted. Furthermore, in the lid | cover 70, about the structure same as the lid | cover 50 demonstrated in 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The lid 70 has the same configuration as the lid 50 except that the display window 72, the wiring hole 73, and the support rib 79 are provided. The support rib 79 is an annular rib protruding from the surface on the concave portion 54 side (the lower surface in FIG. 9), and surrounds the concave portion 54. As shown in FIG. 9A, the substrate 71 is brought into contact with the protruding tip of the support rib 79. The support rib 79 creates a gap between the substrate 71 and the lid 70. In this gap, the light emitting diode 77 and the like mounted on the substrate 71 are located. That is, the support rib 79 functions as a spacer.

  The display window 72 is a hole that penetrates the lid 70 in the thickness direction of the lid 70. The display window 72 emits the light from the light emitting diode 77 to the outside. A transparent sheet 74 is stuck on the upper side of the display window 72 for waterproofing.

  The wiring hole 73 passes through the side wall of the recess 54, and extends from the inner surface of the recess 54 to one surface of the lid 70 (upper surface in FIG. 9, hereinafter referred to as “upper surface”) along the inner bottom surface. A connection line 75 is inserted into the wiring hole 73. One end of the connection line 75 is connected to the photoelectric element 76 fixed to the upper surface of the lid 70 using an adhesive or the like. The photoelectric element 76 is an element that converts light incident on the bonding surface into electrons (current). For example, a semiconductor having a pn junction is used as the photoelectric element 76. For waterproofing, after the connecting wire 75 is inserted, the wiring hole 73 is filled with a sealing member such as silicon.

  The other end of the connection line 75 is connected to the substrate 71. The board 71 has the same shape as the mounting plate 53 (FIG. 4) and includes an insertion hole 56 through which the screw 49 is inserted. An IC chip 40 is surface-mounted on the center of one surface of the substrate 71 (the upper surface in FIG. 9, hereinafter referred to as “upper surface”). A light emitting diode 77 is mounted on the upper surface of the substrate 71. The light emitting diode 77 is, for example, a chip LED.

  Further, as shown in FIG. 9C, an antenna 78 is formed on the upper surface of the substrate 71 by a pattern foil. In the illustrated example, the antenna 78 is a loop antenna.

  In addition, a power storage element 81 shown in FIG. 11 is mounted on the substrate 71. The power storage element 81 is a large-capacity capacitor or a rechargeable battery. The power storage element 81 charges the current output from the photoelectric element 76.

  In addition, various electronic components such as resistors, capacitors, and diodes that form the drive circuit 82 shown in FIG. 11 are mounted on the substrate 71. The drive circuit 82 turns on the light emitting diode 77 using the current output from the power storage element 81 as a drive source. The drive circuit 82 is, for example, a constant voltage circuit.

  An electromagnetic shield member 48 is attached to the other surface of the substrate 71 (the lower surface in FIG. 9).

  The substrate 71 is disposed such that the IC chip 40 fits into the recess 54 and the light emitting diode 77 faces the display window 72, and is attached to the lid 70 by a screw 49.

  The cable protector 30 of the second modification is laid on the ground surface. That is, the photoelectric element 76 is irradiated with sunlight. The photoelectric element 76 generates power upon receiving sunlight. The electric power generated by the photoelectric element 76 is stored in the power storage element 81. The electric power stored in the storage element 81 lights the light emitting diode 77 at night. Light from the light emitting diode 77 is emitted to the outside through the display window 72. The light emitted to the outside can make the pedestrian recognize the position of the sidewalk.

  Note that a light diffusion sheet may be used instead of the transparent sheet 74 so that a pedestrian can easily see the light emitted from the light emitting diode. Moreover, surface light emission may be performed using a light-guide plate.

[Modification 3]

  In the third modification, an example in which a pedestrian is guided by a detection sound generated by the microphone 23 will be described. Configurations other than those detailed below are the same as those in the first embodiment, the second embodiment, the first modification, and the second modification.

  The control unit 22 outputs an audio signal to the microphone 23 each time a reply response is input from the close proximity wireless communication unit 21, and causes the microphone 23 to generate a detection sound. The detection sound allows the pedestrian to recognize that he is on the sidewalk and has left the sidewalk.

  More specifically, the pedestrian recognizes that he / she is on the sidewalk by the detection sound. When the pedestrian moves off the sidewalk, the detection sound that has been generated until then stops. Then, the pedestrian recognizes that he / she has left the sidewalk. A pedestrian who recognizes that he / she has deviated from the sidewalk moves in search of a place where detection sound is generated. As a result, it is possible to prevent the pedestrian from greatly leaving the sidewalk. That is, a pedestrian is guided.

[Modification 4]

  In the fourth modification, as illustrated in FIG. 11, the IC chip 40 includes a storage unit 41, and the configuration in which the position information of the installation position where the IC chip 40 is installed is stored in the storage unit 41 is described. The Configurations other than those detailed below are the same as those in the first embodiment, the second embodiment, the first modification, the second modification, and the third modification.

  The control unit 22 executes the determination / notification process 2 shown in FIG. The control unit 22 waits until a reply response is input from the close proximity wireless transfer unit 21 (S21: No). When a reply response is input (S21: Yes), the control unit 22 acquires position information included in the reply response (S22). The control unit 22 determines whether or not the pedestrian is on the planned route from the acquired position information (S23). The planned route is set by the pedestrian or set by the control unit 22 according to the destination set by the pedestrian. Whether or not the pedestrian is on the planned route is determined based on, for example, whether or not the distance between the current position and the planned route is a predetermined value or more.

  When determining that the pedestrian is on the planned route (S23: Yes), the control unit 22 waits until a reply response is input again (S21: No). When the control unit 22 determines that the pedestrian has deviated from the planned route (S23: No), the control unit 22 outputs an audio signal to the microphone 23 to generate a warning sound.

  In the fourth modification, the pedestrian can walk to the destination without departing from the route by setting the destination and the planned route. That is, pedestrian guidance is performed.

[Other variations]

  In the first embodiment, the configuration in which the mounting plate 53 is attached to the lid 50 by the screw 49 has been described. However, the mounting plate 53 may be attached to the lid 50 using other fixing tools such as bolts and nuts. In addition, the mounting plate 53 may be attached to the lid 50 by snap fitting so that a resin claw is provided on the lid 50 or the mounting plate 53. The mounting plate 53 may be fixed to the lid 50 using an adhesive. The mounting plate 53 may be fixed to the lid 50 by a resin mold. However, it is desirable that the IC chip 40 be detachable in consideration of maintenance and replacement of the IC chip 40. That is, it is preferable to use a screw 49, a bolt and a nut, or a snap fit. Furthermore, screws 49, bolts and nuts are more preferable. More specifically, when the screw 49, the bolt, and the nut are used, it is only necessary to provide a hole in the lid 50. Providing a hole in the lid 50 can be realized only by standing a pin on the mold. That is, the lid 50 can be manufactured by diverting an existing mold. Furthermore, by replacing the pins, it is possible to manufacture both the lid 50 with holes and the lid without holes with a single mold.

  In the above-described embodiments and modifications, the microphone 23 has been described as an example of the notification unit. The notification unit may be a display, for example. The control unit 22 displays a warning display or a detection display on the display instead of the warning sound or the detection sound or together with the warning sound or the detection sound. The warning display and detection display are characters and figures.

  [Third embodiment]

  As shown in FIG. 12, the cable protector 110 according to the third embodiment includes a first main body 34 </ b> A, a second main body 35 </ b> A, and a connection body 60. FIG. 12 is a perspective view showing a state in which the first main body 34A and the second main body 35A are connected along the longitudinal direction. In the figure, two first main bodies 34A, a second main body 35A and a first main body 34A are connected in order from the left front side in the figure.

  The cable protector 110 is suitable when a power transmission cable, a communication cable, an optical fiber cable, and other cables are buried in a relatively shallow position (depth of about 30 cm or less) in the ground or laid on the ground surface. Used for.

  FIG. 13 is a longitudinal sectional view of the first main body 34 </ b> A and the connection body 60.

  The first main body 34A shown in FIG. 13 has a cable (not shown) inserted therein. The first main body 34A includes a first tube main body 11C, and a male insertion port 13 and a female receiving port 12 are formed in the first tube main body 11C.

  The first tube body 11C is configured in a straight tube shape. The male insertion port 13 is formed integrally with the first tube main body 11C at one end of the first tube main body 11C, that is, at one end side (left side in the drawing) in the longitudinal direction (the direction along the axial center line CL1). ing. The female receptacle 12 is formed integrally with the first tube main body 11C at the other end of the first tube main body 11C (on the right side in the direction along the axial center line CL1 in the drawing).

  A flange-shaped reinforcing rib 11S is formed at a substantially central portion in the longitudinal direction of the first tube main body 11C. The reinforcing rib 11S protrudes in the radial direction at a certain height from the outer peripheral surface of the first tube main body 11C, and is continuous over the entire circumference. The height of the reinforcing rib 11S is set to 2 mm, for example. Such a reinforcing rib 11S may be omitted. As for the outer diameter, inner diameter, and thickness of the first tube body 11C, for example, the outer diameter can be set to 100 mm, the inner diameter to 90 mm, and the thickness to 5 mm.

  14A and 14B are enlarged views of main parts of the first pipe body 11C.

  The inner diameter of the male insertion port 13 is constant (see FIG. 13). As shown in FIG. 14A, the outer peripheral surface 13A of the male insertion slot 13 bulges outward in the radial direction, and the vicinity of the tip of the male insertion slot 13 is formed in a substantially wedge shape. Has been. A first groove 13B is continuously provided on the outer peripheral surface 13A of the male insertion opening 13 over the entire circumference.

  The depth of the first groove 13B is constant, and a first O-ring 131 made of rubber that can be elastically deformed is mounted inside the first groove 13B. The outer diameter of the first O-ring 131 is set larger than the inner diameter of the female receptacle 12 provided at the other end of the first pipe body 11C. The first O-ring 131 is fitted and positioned in the first groove 13B. The first O-ring 131 circulates around the outer peripheral surface 13A of the male insertion port portion 13, and the outer edge of the first O-ring 131 protrudes radially outward from the outer peripheral surface 13A of the male insertion port portion 13.

  A second groove 13 </ b> D is provided on the distal end surface 13 </ b> C of the male insertion opening 13. The second groove portion 13D circulates around the distal end surface 13C around the axial center line CL1 of the first tube main body 11C. A second O-ring 132 made of rubber that can be elastically deformed is fitted into the second groove 13D. The second O-ring 132 protrudes from the distal end surface 13 </ b> C of the male insertion opening 13.

  A flange-shaped first displacement guide portion 14 is provided in the male insertion port portion 13. The first displacement guide portion 14 is provided at a position away from the distal end surface 13C of the male insertion port portion 13 by a predetermined distance, and protrudes radially outward. One surface 14A of the first displacement guide portion 14 (the surface on the distal end surface 13C side) is a flat surface along a direction orthogonal to the axial center line CL1 of the first tube main body 11C. In the present specification, the one surface 14 is referred to as a “flat surface 14A”. The other surface 14B of the first displacement guide portion 14 (the surface on the female die receiving portion 12 side) is formed into a curved surface. In the present specification, the other surface 14B is referred to as a “first guide curved surface 14B”. The first guide curved surface 14B is constituted by a part of a virtual spherical surface whose center is located on the axial center line CL1 of the first main body 34A.

  The first displacement guide portion 14 forms a pivot together with a second displacement guide portion 120B (see FIG. 13) described later. As will be described in detail later, in a state where the male insertion opening 13 and the female receiving opening 12 are fitted and connected to each other, both can be flex pivot displaced.

  As shown in FIG. 13, the female receiving part 12 has a cylindrical shape and is formed integrally with the first pipe body 11C. The central axis of the female receptacle 12 coincides with the central axis (the axis core line CL1) of the first tube body 11C and the male insertion slot 13, and the inner diameter and the outer diameter of the female receptacle 12 are It is set to be larger than the outer diameter and inner diameter of one tube body 11C. As shown in FIG. 14 (B), a step portion 15 is formed between the inner peripheral surface 12A of the female receptacle 12 and the inner peripheral surface 11Y of the first tube main body 11C.

  The length L1 along the axial center line CL1 of the female mold receiving portion 12 is longer than the length L2 along the axial center line CL1 of the arc-shaped portion of the male insertion port portion 13.

  As shown in FIG. 14B, the third groove portion 12H is provided on the inner peripheral surface 12A of the female receptacle 12. The third groove portion 12H is formed in an annular shape over the entire circumference of the inner peripheral surface 12A. The depth of the third groove portion 12H is constant, and the groove width (the length along the axial center line CL1) is larger than the groove width of the first groove portion 13B provided in the male insertion port portion 13.

  A ring-shaped rubber plate 12J is fitted in the third groove portion 12H. The rubber plate 12J has a rectangular cross section and is positioned in a state in which a part protrudes from the third groove portion 12H. That is, the rubber plate 12J goes around the inner peripheral surface 12A of the female receiving portion 12 and protrudes radially inward from the inner peripheral surface 12A.

  A male screw 12 </ b> B is formed on the outer peripheral surface of the female receiving part 12. A flange 12C is provided at the boundary between the female receiving part 12 and the first pipe body 11C. The flange 12 </ b> C protrudes radially outward from the outer peripheral surface of the female receptacle 12. The flange 12C functions as a stopper that restricts tightening of the connection body 60 described later.

  A locking groove 12G is provided adjacent to the flange 12C. The locking groove 12G is an annular groove that is formed in a part of the flange 12C and circulates around the flange 12C. The locking groove 12G is used to prevent the connection body 60 from loosening as will be described later. In this embodiment, the locking groove 12G is formed in the flange 12C, but it may be formed in another part of the female receiving part 12.

  For example, the inner diameter and the outer diameter of the female receptacle 12 are set to 106 mm and 116 mm, and the wall thickness is set to 5 mm as in the first main body 34A. Further, the length (length along the axial center line CL1) L1 of the female receiving portion 12 is set to 36 mm, for example. However, it is not limited to these dimensions, and is appropriately changed depending on the size of the cable to be inserted. The first tube main body 11C, the female receiving port 12 and the male insertion port 13 are made of a resin such as PE (polyethylene) or POM (polyoxymethylene), and are typically integrally formed by injection molding. . In addition, 11C of 1st pipe | tube main bodies, the female type | mold receptacle part 12, and the male insertion part 13 may be comprised with metal other than resin.

  As shown in FIG. 13, the connection body 60 has a cylindrical shape and is fitted to the outside of the female receiving portion 12.

  15A and 15B are perspective views for explaining the configuration of the connection body 60. FIG.

  As shown in FIGS. 15A and 15B, the connection body 60 includes a pair of first half body 61 and second half body 62 that can be divided into two. The first half body 61 and the second half body 62 have a semi-cylindrical shape, and the cylindrical connection body 60 is assembled by abutting and joining the respective openings.

  As shown in FIG. 13, the second displacement guide portion 120 </ b> B is formed on the other end side of the connection body 60. The second displacement guide portion 120B protrudes radially inward over the entire circumference. The second displacement guide portion 120B has an annular shape, and an opening 120C is formed at the center thereof. The inner diameter of the opening 120 </ b> C is larger than the maximum outer diameter of the male insertion port 13.

  As shown in FIGS. 15 (A) and 15 (B), a half circumference portion of the second displacement guide portion 120 </ b> B is formed at the other end of each of the first half 61 and the second half 62. . Half-circumferential portions of the second displacement guide portion 120B are continuous in a state where the first half body 61 and the second half body 62 are abutted with each other and assembled to the connection body 60, and the annular second displacement guide portion 120B. Configure. The opening 120C is formed at the center of the second displacement guide 120B.

  As shown in FIG. 13, the second displacement guide portion 120B includes a second guide curved surface 120E. The second guide curved surface 120E is configured by the inner surface of the second displacement guide portion 120B and is curved in a spherical shape. The curvature of the second guide curved surface 120E corresponds to the curvature of the first guide curved surface 14B (see FIG. 14A) provided in the male insertion slot 13.

  As shown in FIG. 15, the second half 62 is formed with a half circumference portion of the second guide curved surface 120 </ b> E. The first half 61 is also formed with a half circumference portion of the second guide curved surface 120E. The first half body 61 and the second half body 62 are abutted with each other to assemble the connection body 60, whereby a second guide curved surface 120E that is continuous in the circumferential direction is formed.

  As shown in FIG. 13, a female screw 120 </ b> A is formed on the inner peripheral surface of the connection body 60. As shown in FIGS. 15 (A) and 15 (B), a half-circumferential portion of the female screw 120A is formed on the inner peripheral surfaces of the first half 61 and the second half 62, respectively. The first half body 61 and the second half body 62 are abutted with each other and the connecting body 60 is assembled, whereby a female screw 120A continuous in the circumferential direction is formed.

  As shown in FIG. 13, a protrusion 120 </ b> F is formed on one end side of the connection body 60. The protrusion 120F protrudes inward in the radial direction of the connection body 60, and is formed in an annular shape over the entire circumference. As shown in FIG. 15A and FIG. 15B, a half circumference portion of the protrusion 120 </ b> F is formed at one end of each of the first half 61 and the second half 62. The first half body 61 and the second half body 62 are butted against each other and the connection body 60 is assembled, whereby a protrusion 120F continuous in the circumferential direction is formed.

  Each of the first half 61 and the second half 62 is provided with a ridge 120D. Each ridge 120D is disposed at the circumferential center of the first half 61 and the second half 62, and extends in the direction of the axis CL1. Further, the first half 61 includes a first flange 63 on the surface facing the second half 62. On the other hand, the second half 62 includes a second flange 65 on the surface facing the first half 61. The first half body 61 and the second half body 62 are butted against each other and the connecting body 60 is assembled, whereby the ridge 120D is formed. That is, on the outer peripheral surface of the assembled connecting body 60, four ridges 120D, each along the axial center line CL1, are formed in a state where a certain interval is provided in the circumferential direction.

  As shown in FIG. 15, the second flange 65 provided in the second half 62 is provided with three insertion holes 66 through which bolts (not shown) are inserted.

  As shown in FIGS. 15A and 15B, the first flange 63 is provided with three insertion holes 64 through which bolts (not shown) are inserted. These are arranged at positions corresponding to the respective insertion holes 66. The bolts inserted through the insertion hole 64 and the insertion hole 66 are screwed into the nut, whereby the first half 61 and the second half 62 are connected and fixed, and the connection body 60 is assembled.

  The first flange 63 of the first half 61 includes a recess 67 into which the IC chip 40 is fitted. The recess 67 opens to the contact surface side with the second flange 65. After the IC chip 40 is fitted in the recess 67, the first half 61 and the second half 62 are coupled, whereby the IC chip 40 is held by the connection body 60.

  The electromagnetic shield member 48 (FIG. 7) is disposed between the first body 34 </ b> A and the second body 35 </ b> A and the connection body 60. The electromagnetic shield member 48 is held by being sandwiched between the first main body 34 </ b> A and the second main body 35 </ b> A and the connection body 60. The electromagnetic shield member 48 arranged in this way is located between the IC chip 40 and the cable 32. Therefore, the electromagnetic shield member 48 shields the electromagnetic wave emitted by the cable 32 and protects the IC chip 40 from the electromagnetic wave. The electromagnetic shield member 48 may be attached to the inner peripheral surfaces of the first main body 34A and the second main body 35A.

  FIG. 17 is a cross-sectional view showing a state where adjacent first main bodies 34A are connected.

  The first main body 34A having such a configuration is adjacent to and connected to the first main body 34A having the same configuration, for example. In this case, the connection body 60 is preliminarily fitted to the outside of the male insertion opening 13 provided at one end of the first main body 34A (see FIG. 17).

  The male insertion opening 13 provided at one end of the first main body 34A is inserted into the female receiving opening 12 provided at the other end of the other first main body 34A. The connection body 60 provided on one first main body 34A is screwed into the female receptacle 12 of the other first main body 34A. The connection body 60 is operated and further screwed. In this case, for example, when a jig for rotating the connection body 60 is engaged with each protrusion 120D provided on the connection body 60, the connection body 60 is easily rotated.

  When the connection body 60 is rotated, the second displacement guide portion 120B of the connection body 60 approaches the first displacement guide portion 14 of the first main body 34A. Accordingly, the second guide curved surface 120E in the second displacement guide portion 120B of the connection body 60 abuts on the first guide curved surface 14B in the first displacement guide portion 14. In this state, when the connecting body 60 is further tightened, the male insertion opening 13 provided in one first main body 34A is press-fitted into the female receiving opening 12 in the other first main body 34A. At the same time, one end surface 120H of the connection body 60 abuts on the flange 12C.

  FIG. 16 is a cross-sectional view showing a state where adjacent first main bodies 34A are connected.

  The first main body 34A having such a configuration is adjacent to and connected to the first main body 34A having the same configuration, for example. In this case, the connection body 60 is preliminarily fitted to the outside of the male insertion opening 13 provided at one end of the first main body 34A (see FIG. 16).

  The male insertion opening 13 provided at one end of the first main body 34A is inserted into the female receiving opening 12 provided at the other end of the other first main body 34A. The connection body 60 provided on one first main body 34A is screwed into the female receptacle 12 of the other first main body 34A. The connection body 60 is operated and further screwed. In this case, for example, when a jig for rotating the connection body 60 is engaged with each protrusion 120D provided on the connection body 60, the connection body 60 is easily rotated.

  When the connection body 60 is rotated, the second displacement guide portion 120B of the connection body 60 approaches the first displacement guide portion 14 of the first main body 34A. Accordingly, the second guide curved surface 120E in the second displacement guide portion 120B of the connection body 60 abuts on the first guide curved surface 14B in the first displacement guide portion 14. In this state, when the connecting body 60 is further tightened, the male insertion opening 13 provided in one first main body 34A is press-fitted into the female receiving opening 12 in the other first main body 34A. At the same time, one end surface 120H of the connection body 60 abuts on the flange 12C.

  FIG. 17 is an enlarged view of a main part in FIG.

  As shown in FIGS. 16 and 17, when the connection body 60 abuts on the flange 12C, the tightening of the connection body 60 is regulated by the flange 12C. Further, the protrusion 120 </ b> F provided on the connection body 60 is fitted into the loosening groove 12 </ b> G provided on the outer peripheral surface of the female receiving part 12. As a result, the male insertion opening 13 of one first main body 34A and the female receiving opening 12 of the other first main body 34A are fitted and connected to each other, and the first main body 34A and the first first main body 34A are connected to each other. The main body 34A is connected.

  Since the tightening of the connection body 60 is restricted in a state where the pair of first main bodies 34A are coupled, the second displacement guide portion 120B of the connection body 60 is replaced by the first displacement guide portion 14 of the first main body 34A. It is avoided that the pressure comes into contact with a predetermined pressure and the pressure becomes excessive. For this reason, the 1st displacement guide part 14 and the 2nd displacement guide part 120B which contact | connected mutually will be in a slidable contact state. That is, the male insertion opening 13 of one first main body 34A is flex pivot displaced with respect to the female receiving opening 12 of the other first main body 34A.

  Next, the second main body 35A will be described.

  FIG. 18 is a longitudinal sectional view of the second main body 35A.

  As shown in FIG. 18, a cable (not shown) is inserted through the second main body 35A. The connection body 60 has the same configuration as the connection body 60 provided in the first main body 34A. As will be described later, the second main body 35A can maintain a cable inserted through the second main body 35A.

  The second main body 35A includes a second pipe main body 11X, a male insertion opening 13 provided at one end of the second pipe main body 11X, and a female provided at the other end of the second pipe main body 11X. And a mold receiving portion 12. The male insertion opening 13 and the female receiving opening 12 of the second main body 35A have the same configuration as the male insertion opening 13 and the female receiving opening 12.

  FIG. 19 is an enlarged view of a main part of FIG. 18, and is a longitudinal sectional view in which a part of the second main body 35A in the second main body 35A is enlarged.

  As shown in FIGS. 18 and 19, the second main body 35A includes a cylindrical body 11D having a rectangular tube shape. The cylinder 11D is disposed at the center of the second main body 35A and protrudes outward in the radial direction. As shown in FIG. 18, the axial center line CL2 of the cylinder 11D is orthogonal to the axial center line CL1 of the second main body 35A.

  FIG. 20 is an enlarged perspective view of the cylinder 11D provided in the second main body 35A.

  As shown in FIG. 21, the cylindrical body 11D includes a pair of first wall surfaces 11E extending from the outer peripheral surface of the second pipe body 11X along the tangential direction of the outer peripheral surface, and the first wall surfaces 11E. A pair of second wall surfaces 11F orthogonal to each other. The pair of first wall surfaces 11E have the same shape, and the tips on the protruding sides of the pair of first wall surfaces 11E are located on the same virtual plane. The pair of second wall surfaces 11F have the same shape, and the protrusion-side tips of the second wall surfaces 11F are located on a virtual plane where the protrusion-side tips of the first wall surfaces 11E are located.

  Therefore, the end openings formed by the respective leading ends of the pair of first wall surfaces 11E and the respective leading ends of the pair of second wall surfaces 11F are located on a virtual plane, and the maintenance window 39 is formed by the end opening. Is formed. The maintenance window 39 is used in the maintenance work of the cable that passes through the inside of the second main body 35A.

  As shown in FIG. 19, a recess 11 </ b> H is formed on the peripheral edge 11 </ b> N of the maintenance window 39 over the entire circumference. A rubber third O-ring 11J as a seal member is fitted in the recess 11H.

  As shown in FIGS. 19 and 20, a rib 11K is provided on the outer peripheral side of the recessed portion 11H of the peripheral edge portion 11N. The ribs 11K are continuous on the tip surfaces of the pair of second wall surfaces 11F. On the other hand, three gaps 11M are formed in the rib 11K on the front end surfaces of the pair of first wall surfaces 11E. Each of the three gaps 11M provided in one first wall surface 11E is opposed to each of the three gaps 11M provided in the other first wall surface 11E.

  As shown in FIG. 12, a lid 50 for opening and closing the maintenance window 39 is attached on the cylinder 11D. The lid 50 includes a lid main body 50 </ b> A that is large enough to close the maintenance window 39 and a protruding piece 51. Three protruding pieces 51 are arranged on each side edge of the lid main body 50A along the longitudinal direction.

  The lid main body 50A is fitted to the inner peripheral side of the rib 11K provided on the peripheral edge portion 11N of the maintenance window 39. As shown in FIG. 19, when the lid main body 50A is fitted to the inner peripheral side of the rib 11K, the lid main body 50A is pressed against the third O-ring 11J.

  As shown in FIG. 12, each protruding piece 51 formed on the lid main body 50 </ b> A includes an insertion hole 52. When the lid main body 50A is arranged on the peripheral edge portion 11N, the protruding pieces 51 provided on the lid main body 50A are respectively outward from the gaps 11M of the ribs 11K provided on the front end surfaces of the first wall surface 11E. Protruding state.

  The lid 50 is attached to the second tube main body 11X of the second protective tube 11B by three attachment fittings 45. Each mounting bracket 45 is made of, for example, a steel material. The mounting bracket 45 has a bracket main body 45A that is curved in a U-shape. At both ends of the metal fitting main body 45A, flanges 46 that are bent outward with respect to the metal fitting main body 45A are provided. Each flange 46 is provided with an insertion hole 47.

  The flange 46 of each mounting bracket 45 is opposed to the protruding piece 51 provided on the lid 50. In such a state, the bolt 43 is inserted into the insertion hole 52 of each protruding piece 51 and the insertion hole 47 of the flange 46, and the nut 44 is screwed to each bolt 43. As a result, the lid 50 is attached to the cylinder 11D of the second pipe body 11X with the maintenance window 39 closed. At this time, the lid 50 is in pressure contact with the third O-ring 11J provided at the peripheral edge portion 11N of the cylinder 11D, and the maintenance window 39 is sealed in a liquid-tight manner by the lid 50.

  In addition, you may comprise cylinder 11D with an elastic body. In this case, it is not necessary to provide the third O-ring 11J, and the lid main body 50A and the cylinder 11D are sealed in a liquid-tight manner by pressing the lid main body 50A against the peripheral edge portion 11N of the cylinder 11D. Further, the cylindrical body 11D is not limited to a rectangular tube shape, and may be a cylindrical shape.

  The case where the second main body 35A is connected to the first main body 34A is the same as the case where the first main bodies 34A are connected to each other. That is, the male insertion opening 13 provided in the second main body 35A of the second main body 35A and the female receiving opening 12 provided in the first protection 11A of the adjacent first main body 34A are fitted together, and the connection body 60 is fitted. It is connected via. In addition, the female receiving part 12 provided in the second main body 35A and the male insertion opening 13 provided in the adjacent first main body 34A are fitted to each other and connected via the connection body 60. The connected second main body 35A and first main body 34A can be flex pivot displaced as described above.

  When maintenance work is performed on the cable inserted through the second main body 35A, the lid 50 attached to the second pipe main body 11X of the second main body 35A is removed from the maintenance window 39 by the operator. When the second main body 35A is buried in the ground, the ground is excavated so that the second main body 35A is exposed to the ground surface.

  When the mounting bracket 45 is removed, the fixing of the lid 50 to the second main body 35A is released, and the lid 50 is removed from the second main body 35A by the operator. In such a state, the maintenance window 39 of the cylinder 11D provided in the second main body 35A is opened, and the operator can perform maintenance work on the cable inserted through the second main body 35A.

  As shown in FIG. 16, when the pair of first main bodies 34A are connected to each other, the male insertion port 13 of one first main body 34A of the pair of adjacent first main bodies 34A is the other first main body 34A. Flex pivot displacement is possible with respect to the female receiving portion 12 of the main body 34A. Thereby, even when an external force is applied to the first main body 34A, damage to one or both of the first main bodies 34A is suppressed. Further, even when the first main body 34A and the second main body 35A are fitted and connected, both can be flex-pivot displaced. Thereby, damage to either one or both of the first main body 34A and the second main body 35A is suppressed.

  Since the first tube main body 11C of the first main body 34A and the second tube main body 11X of the second main body 35A are liquid-tightly connected (that is, exhibit a waterproof function), it is not necessary to be separately accommodated in a protective case. . This improves the workability for connecting the first main bodies 34A or for connecting the first main body 34A and the second main body 35A. In addition, since a protective case is not required, the economical efficiency as a cable protector is improved.

  In the present embodiment, a guide curved surface that abuts each other and guides the flex pivot displacement is formed on the first displacement guide portion 14 of the male insertion port portion 13 and the second displacement guide portion 120B of the connection body 60. . This facilitates the flex pivot displacement described above. In this case, since the second guide curved surface 120E has a concave shape corresponding to the convex first guide curved surface 14B, as shown in FIG. 8, the second guide curved surface 120E and the first guide curved surface that are in contact with each other. 14B slides smoothly. Thereby, the male insertion opening 13 and the female receiving opening 12 that are fitted and connected are more smoothly brought into sliding contact with each other, and the breakage of both is more reliably suppressed.

  As shown in FIG. 17, the first O-ring 131 provided in the male insertion port portion 13 is elastically deformed and pressed against the rubber plate 12J provided on the inner peripheral surface 12A of the female receiving port portion 12. Thereby, the elastic displacement between both is accept | permitted, ensuring the liquid-tightness of the female receiving part 12 and the male insertion part 13 which became the fitting state. As a result, the flex pivot displacement of the male insertion opening 13 with respect to the female receiving opening 12 is further smoothed.

  The second O-ring 132 provided on the distal end surface 13C of the male insertion opening 13 elastically contacts the step portion 15 formed on the inner peripheral surface of the first main body 34A. Thereby, the elastic displacement between the female receptacle part 12 and the male insertion part 13 which were mutually fitted is permitted. Also by this, the flex pivot displacement of the male insertion opening 13 with respect to the female receiving opening 12 becomes smooth.

  In addition, as shown in the figure, the protrusion 120F provided on the connection body 60 is fitted into the loosening groove 12G provided on the outer peripheral surface of the female receptacle 12 so that the connection body 60 Looseness is reliably regulated.

  As shown in FIG. 15, since the connection body 60 has a pair of first half 61 and second half 62 that can be divided into two, the pair of first half 61 and second half 62 are combined. Thus, the connection body 60 is assembled in a state where it is mounted on the first main body 34A or the second main body 35A. Therefore, workability such as attachment and replacement of the connection body 60 is improved.

  As shown in FIG. 15, the protrusions 120 </ b> D are formed along the axial direction on the outer peripheral surface of the connection body 60, so that the strength of the connection body 60 is improved and the tightening operation of the connection body 60 is easy. become.

  As shown in FIGS. 13 and 18, the female receiving part 12 and the male insertion part 13 are formed integrally with the first pipe main body 11C or the second pipe main body 11X, and thus the first pipe. The main body 11C or the second pipe main body 11X, the female receiving part 12 and the male insertion opening 13 can be integrally formed. Therefore, the first main body 34A and the second main body 35A are manufactured at low cost.

  As shown in FIG. 12, since the second main body 35A is provided with the maintenance window 39 and the lid 50 for opening and closing the maintenance window 39 on the second main body 35A, the maintenance operator removes the lid 50 and opens the maintenance window. Through 39, the maintenance work of the cable inserted through the second tube main body 11X can be easily performed.

  The maintenance window 39 is provided in the end face opening of the cylinder 11D. Thereby, the maintenance worker can perform the maintenance work of the cable through the end opening of the cylinder 11D.

[Modification 5]

  In the embodiment described above, the connection body 60 is formed by coupling the first half body 61 and the second half body 62 to each other, but is not limited to such a configuration.

  FIG. 21 is a cross-sectional view of the cable protector 111 according to this modification.

  As shown in FIG. 21, the cable protector 111 includes a first main body 34 </ b> B and a connection body 129. The first main body 34 </ b> B includes a first pipe main body 11 </ b> C, a female receiving port 12, and a male insertion port 13.

  In this modification, the connection body 129 is integrally formed of a synthetic resin (for example, vinyl chloride), and the protrusion 120D (see FIG. 15) is not provided. The connection body 129 of this modification has the same configuration as that of the connection body 60 of the third embodiment except for the above.

  The connecting body 129 is molded in a state in which it is fitted and attached to the male insertion port 13 provided in the first main body 34A. For this purpose, for example, in one mold, a molded body corresponding to the internal shape of the connection body 129 around the male insertion opening 13 having the first displacement guide portion 14, and the molded body is connected to the connection body. The connecting body used as the internal mold of 129 is molded at the same time. That is, the male insertion slot 13 having the first displacement guide portion 14 is arranged in the mold, and a shape corresponding to the internal shape of the connection body 129 is formed around the male insertion slot 13 by, for example, ABS resin. A molded body is molded, and at the same time, the connecting body 129 is molded by, for example, vinyl chloride. Thereafter, the molded body made of ABS resin is removed from the male insertion slot 13 to form the connection body 129 fitted and attached to the male insertion slot 13.

[Modification 6]

  In the first main body 34A, the first tube main body 11C, the female receiving portion 12 and the male insertion opening 13 are not limited to being integrally formed with the same resin. For example, the first tube body 11C and the female receiving port 12 may be formed of a hard synthetic resin, and the male insertion port 13 may be formed of an elastic body. In this case, the male insertion port 13 is integrally connected to the first tube body 11C. The outer peripheral surface of the male insertion opening 13 that is an elastic body is elastically pressed against a rubber plate 12J provided on the inner peripheral surface of the female receiving opening 12. Therefore, without using the first O-ring 131, the female receiving part 12 and the male insertion part 13 are fitted elastically and fluid-tightly.

  Moreover, the structure which the rubber plate 12J is not provided in the female-type receptacle part 12 may be sufficient. In this case, the outer peripheral surface of the male insertion port portion 13 that is an elastic body is brought into pressure contact with the inner peripheral surface of the female receiving port portion 12, and both are brought into elastic and liquid-tight contact. Furthermore, the female receiving part 12 may be constituted by an elastic body.

  Note that the same design change is possible in the second main body 35A, and the second pipe main body 11X (FIG. 20), the female receiving portion 12 and the male insertion portion 13 are integrally formed by the same resin. It is not restricted to the structure shape | molded by.

[Modification 7]

  An existing pipe joint (general-purpose product) can be used as the first pipe body 11C of the first body 34A.

  22A to 22D are side views of pipe joints 140A to 140D used as the first main body 34A.

  A pipe joint 140A shown in FIG. 22A includes a straight tubular joint body 141A and receiving ports 142 provided at both ends of the joint body 141A. When such a pipe joint 140A is used as the first pipe body 11C, the female receptacle part 12 and the male insertion part 13 are respectively connected to the receptacle parts 142 provided at both ends of the joint body 141A. By being connected, the first main body 34A is obtained. In addition, although the external thread is formed in the said receptacle part 142, this male screw may be abbreviate | omitted and the said female-type receptacle part 12 and the said male insertion part 13 may be connected to the said receptacle part 142.

  A pipe joint 140B shown in FIG. 22 (B) has a branch pipe 143 connected to the center of a straight tubular joint body 141A. Receiving port portions 142 are provided at both ends of the joint main body 141 </ b> A, and the receiving port portions 142 are also provided at the distal end portion of the branch pipe 143. Even in such a pipe joint 140B, the female receiving part 12 and the male insertion part 13 are respectively connected to the receiving parts 142 at both ends of the joint main body 141A. In addition, the female receiving port 12 or the male insertion port 13 is integrally connected to the receiving port 142 of the branch pipe 143. Thereby, the first main body 34A is formed. In addition, although the external thread is formed in the said receptacle part 142, of course, this external thread may be abbreviate | omitted.

  A pipe joint 140C shown in FIG. 22 (C) is provided with a pair of branch pipes 143 branched in opposite directions at the center of a straight tubular joint body 141A. Receiving port portions 142 are provided at both ends of the joint main body 141 </ b> A, and receiving port portions 142 are also provided at the distal end portions of the branch pipes 143. In such a pipe joint 140C, the female receiving part 12 and the male insertion part 13 are integrally connected to the receiving parts 142 at both ends of the joint main body 141A, respectively. In addition, the female receiving port 12 and the male insertion port 13 are integrally connected to the receiving port 142 of each branch pipe 143. Thereby, the first main body 34A is formed. In addition, although the external thread is formed in the said receptacle part 142, of course, this external thread may be abbreviate | omitted.

  In addition, instead of the pipe joint 140A shown in FIG. 22 (A), as shown in FIG. 22 (D), a pipe joint 140D in which the joint main body 141D has a curved shape is replaced with the first joint 34A of the first main body 34A. It can also be used as the tube body 11C. In addition, although the external thread is formed in the said receptacle part 142, of course, this external thread may be abbreviate | omitted.

[Modification 8]

  As shown in FIG. 14, in the above-described embodiment, the second O-ring 132 is provided on the distal end surface 13 </ b> C of the male insertion slot 13. However, the second O-ring 132 is not provided. There may be. In such a configuration, when the female receptacle 12 of the other first main body 34A is inserted into the male insertion opening 13 of one first main body 34A, the male insertion of the first first main body 34A is inserted. A gap is formed between the tip surface 13C of the mouth portion 13 and the step portion 15 in the other first main body 34A. Thereby, the tolerance | permissible_range of the flex pivot displacement of the male insertion part 13 with respect to the female type receiving part 12 becomes large.

[Fourth Embodiment]

  In the first embodiment, the second embodiment, the third embodiment, and the respective modifications, the round cylindrical cable protectors 30, 110, and 111 have been described. However, the cable protector may have another tubular shape such as a square tube. In the fourth embodiment, a rectangular tube-shaped cable protector 112 shown in FIG. 23 will be described.

  As shown in FIG. 23A, the cable protector 112 includes a plurality of protective casings 90 each having a rectangular tube shape. As shown in FIG. 23B, the protective housing 90 includes an intermediate cylinder 91 and an outer cylinder 92 that houses the intermediate cylinder 91. The middle cylinder 91 has a round cylindrical shape and has an insertion hole 93 through which a cable is inserted. The outer cylinder 92 has a rectangular box shape (square cylinder shape). The outer cylinder 92 has a pair of opening 94 that exposes the insertion hole 93 of the middle cylinder 91 on each of a pair of opposite side surfaces.

  The outer cylinder 93 includes a first half 95 and a second half 96 having substantially the same shape. The first half 95 and the second half 96 are attached to each other using bolts 97 and nuts 98.

  The IC chip 40 is attached to the first half 95. The attachment structure of the IC chip 40 is the same as that of the first embodiment. Briefly, the first half 95 is provided with a recess 54 (FIG. 4) into which the IC chip 40 is fitted. After the IC chip 40 is fitted into the recess 54, the electromagnetic shield member 48 (FIG. 4) is arranged as in the first embodiment. Thereafter, the mounting plate 53 (FIG. 4) is attached to the first half 95 using the screw 49. The electromagnetic shield member 48 and the IC chip 40 are fixed to the first half body 95 by the mounting plate 53.

[Modification 9]

  In the fourth embodiment, the example in which the IC chip 40 is provided in the first half 95 has been described. The IC chip 40 may be provided on the flange as in the second embodiment. That is, the first half body 95 and the second half body 96 are provided with flanges having the same configuration as the first flange 63 and the second flange 65 (FIG. 6) of the second embodiment. The IC chip 40 is disposed in a recess provided in the flange of the first half 95 or the second half 96.

DESCRIPTION OF SYMBOLS 10 ...... Pedestrian guidance system 11C ... 1st pipe | tube main body 11D ... Cylindrical body 11X ... 2nd pipe | tube main body 12 ... Female type receptacle part 12B ... Male screw 12C ... Flange (stopper)
12G: Retaining groove 13 ... Male insertion slot 14 ... First displacement guide 14B ... First guide curved surface 20 ... Portable device 21 ... Proximity wireless communication Part 22 ... Control part 23 ... Microphone 30 ... Cable protector 31 ... Protective housing 32 ... Cable 33 ... Insertion hole 34A ... First body 25A ... second body 39 ... maintenance window 40 ... IC chip 41 ... storage unit 42 ... antenna 48 ... electromagnetic shielding member 50 ... lid 57 ... ... Lid 61 ... First half 62 ... Second half 63 ... First flange 65 ... Second flange 67 ... Recess 70 ... Lid 71 ... substrate 72 ... display window 74 ... transparent sheet 76 ... photoelectric element 77 ... light emitting diode 78 ··· Antenna 82 ··· Drive circuit 110 · · · Cable protector 111 · · · Cable protector 120A · · Female screw 120B · · Second displacement guide portion 120D · · · ridge 120E · · · second Guide curved surface 120F..Protrusion 129 ... Connector 131 ... First O-ring 132 ... Second O-ring

  The present invention relates to a cable protector that surrounds and protects cables such as a power transmission cable and a communication cable, and a pedestrian guidance system.

  A cable protector that surrounds and protects a cable such as a power transmission cable or a communication cable is known (for example, see Patent Document 1). The cable protector is buried in the ground together with the cable or laid on the ground surface. The cable protector protects the cable from water and soil.

Japanese Patent No. 5814453

  In recent years, it has been desired to provide facilities on a sidewalk or the like to safely guide elderly people and pedestrians who are blind. On the other hand, some cables (cable protectors) are installed along a sidewalk. Then, this inventor considered performing the safe guidance of a pedestrian using the cable protector installed along a sidewalk.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a cable protector and a pedestrian guidance system capable of easily constructing equipment for safely guiding pedestrians.

(1) A cable protector according to the present invention includes a cylindrical protective housing having an insertion hole through which a cable is inserted, and an IC chip that is provided in the protective housing and performs proximity wireless communication. A maintenance window for exposing the cable and a resin lid for closing the maintenance window are provided. The IC chip is disposed inside the lid.

  The cable protector is buried in the ground along the sidewalk together with the cable, or is laid on the ground surface. The cable protector protects the inserted cable from water, dust and dirt. The IC chip is provided in a protective housing and is protected from water, dust, dirt, and the like together with the cable. The presence of the IC chip is detected in a communication device held by a pedestrian through proximity wireless communication. That is, the IC chip informs the pedestrian of the existence of the sidewalk. For example, when the pedestrian goes off the sidewalk, the IC chip is not detected by the communication device. As a result, the cable protector (IC chip) can make the pedestrian recognize that the cable protector (IC chip) has come off the sidewalk.

  The cable protector is installed with the maintenance window and lid facing up. The IC chip is provided on the lid. Therefore, the cable protector can be installed in the operator with the IC chip facing up without having the operator confirm the position of the IC chip. As a result, installation work of the cable protector can be facilitated.

  Further, since the lid is opened and closed with respect to the main body, the IC chip can be replaced by opening the lid. Therefore, the worker can easily perform the maintenance work.

  Further, since the IC chip is disposed inside the lid, the IC chip can be protected from dirt, water, and dust.

  (2) The cable protector according to the present invention may include an electromagnetic shield member at a position between the IC chip and the cable.

  The cable protected by the cable protector is a power transmission cable or a communication cable. Depending on the type of cable, strong electromagnetic waves are emitted from the cable. The electromagnetic shielding member shields the electromagnetic wave radiated from the cable and protects the IC chip from the electromagnetic wave.

(3) The cable protector according to the present invention may include an electromagnetic shield member disposed inside the lid, and a mounting plate that sandwiches the electromagnetic shield member together with the lid.

  By sandwiching the electromagnetic shield member between the mounting plate and the lid, the electromagnetic shield member can be reliably held.

(4) The protective housing may include a first half and a second half that are attached to each other. The first half has a first flange. The second half has a second flange secured to the first flange. At least one of the first flange and the second flange has a recess into which the IC chip is fitted.

  The first half and the second half are attached to each other together with the first flange and the second flange. The IC chip is fitted into a fitting recess provided in one or both of the first flange and the upper second flange. Therefore, protection and fixing of the IC chip can be performed with a simple configuration. Moreover, since it only forms a recessed part, it can respond only by correction of the existing metal mold | die.

(5) The protective housing may include a maintenance window that exposes the cable and a lid that closes the maintenance window, and the lid may include an antenna that is electrically connected to the IC chip.

  The antenna is, for example, a loop antenna or a pole antenna. The antenna is formed by, for example, a conductive wire or a pattern foil. By providing the antenna, the reception sensitivity of the IC chip is increased.

(6) The protective housing may include a wiring hole through which a connection line having one end connected to the IC chip and the other end connected to the antenna is inserted.

  When the cable protector is buried deep in the ground, the antenna installed on the ground surface and the IC chip of the cable protector are connected by a connection line.

(7) The cable protector according to the present invention includes a photoelectric element that converts light into current, a storage element that stores the current converted by the photoelectric element, a drive circuit that uses the storage element as a drive source, and the drive And a light emitting diode that is turned on by a circuit.

  When the cable protector is laid on the ground surface, the current generated by the photoelectric element is stored in the storage element. The stored current turns on the light emitting diode at night. Pedestrians can be recognized by the light from the light emitting diodes.

(8) The protective housing may include a maintenance window for exposing the cable and a lid for closing the maintenance window. The photoelectric element is disposed on an outer surface of the lid, the power storage element, the drive circuit, and the light emitting diode are disposed in the protective housing, and the lid includes a display window that allows the light emitting diode to be visually recognized. And a translucent sheet covering the display window.

(9) The IC chip may have position information.

  The IC chip conveys position information of the installation location where the cable protector is installed to the pedestrian.

(10) The protective housing includes one end portion and the other end portion, and includes a tube main body through which a cable is inserted and a connection body externally fitted to the tube main body. One end portion and the other end portion of the other end may be fitted and connected via the connection body to surround a long cable. The other end portion and one end portion of the tube main body are provided with a female receiving portion and a male insertion portion formed so as to be able to fit in an elastic and liquid tight manner corresponding to the female receiving portion. . A male screw is formed on the outer peripheral surface of the female receiving part, and the connection body has a female screw corresponding to the male screw. The female receiving part is in a state in which the male insertion part is fitted to the female receiving part of the adjacent pipe body and the connection body is screwed into a male screw formed in the female receiving part. And a stopper for restricting tightening of the connection body at a predetermined position. The male insertion port portion is in contact with a predetermined portion of the connection body and the male mold in a state in which the connection body is restricted from being tightened by a stopper provided in the female reception port portion of the adjacent pipe body. The insertion opening has a displacement guide for allowing flex pivot displacement with respect to the female receiving part of the adjacent pipe body. A guide curved surface formed of a part of a spherical surface that abuts each other and guides the flex pivot displacement is formed on the predetermined portion of the connection body and the displacement guide portion, and the center of the guide curved surface is one end of the pipe body. The projected length in the axial direction of the tube main body of the virtual line segment that is located on the axial line on the part side and connects the normal line of the guide curved surface and the center is the radial direction of the tube main body of the virtual line segment. It is arrange | positioned so that it may become larger than projection length of. A first elastically deformable O-ring is mounted on the outer peripheral surface of the male insertion slot. The outer diameter of the first O-ring is set larger than the inner diameter of the female receiving portion of the adjacent pipe body. A second O-ring that can be elastically deformed is disposed so as to protrude from the end face of the male insertion slot.

  Since a cable laid or buried in a road or the like is generally long, a plurality of cable protectors are connected as follows to surround the cable.

  The male insertion port of one tube body is fitted elastically and liquid tightly into the female receiving port of the other tube body. That is, since the first O-ring is mounted on the outer peripheral surface of the male insertion port portion, the first O-ring is elastically deformed to the inner wall surface of the female receiving port portion of the adjacent tube body. Pressed. At the same time, since the second O-ring is arranged so as to protrude from the end face of the male insertion slot, the second O-ring is elastically deformed and pressed against the female receptacle. That is, the space between the female receptacle and the male insertion slot is waterproof, and the male insertion slot can be elastically displaced with respect to the female receptacle.

  In this state, the female screw of the connecting body provided in one pipe body is screwed into the male screw provided in the female receiving portion of the adjacent pipe body (that is, the other pipe body). When this connection body is tightened and brought into contact with a stopper provided in the female receptacle of the other pipe body, tightening of the connection body is regulated by the stopper, and at this time, the connection body The predetermined portion is in contact with a displacement guide portion provided in the male insertion port portion of one of the tube main bodies. Since the tightening of the connection body is restricted, the connection body is in contact with the displacement guide portion with a predetermined pressing force. That is, since this pressing force does not become excessive, the flex-pivot displacement of the male insertion port of one tube body is possible with respect to the female receiving port of the other tube body.

  The flex pivot displacement is performed by sliding the guide curved surface of the connection body and the guide curved surface of the displacement guide portion. These guide curved surfaces are spherical surfaces, and the position of the center thereof exists on the axis on the one end side of the tube main body, and the imaginary line segment connecting the normal line of the guide curved surface and the center of the tube main body. The projection length in the axial direction is set to be larger than the projection length in the radial direction of the tube main body of the virtual line segment. That is, the flex pivot displacement of the male insertion port portion inevitably becomes very gradual with respect to the female receiving port portion. If an external force is applied between the two, flex pivot displacement occurs accordingly, and the first and second O-rings are also deformed. When the external force is removed, the first and second The flex pivot displacement is restored by the elasticity of the O-ring. As a result, the external force acting on the adjacent cable protectors is absorbed, and damage to one or both of the male insertion port and the female receiving port is suppressed.

  When the embedment depth is small, the structural strength required for the cable protector is low, and it is sufficient if it can be easily deformed while ensuring liquid tightness against a relatively small external force. It is preferably used when the embedding depth is small. The cable protector does not require a casing as compared to the conventional one, and has a simple structure and excellent workability and economy compared to the conventional cable protector.

(11) The pedestrian guidance system according to the present invention includes a cylindrical protective housing having an insertion hole through which a cable is inserted, and a portable device. The portable device includes a proximity wireless communication unit that performs proximity wireless communication with the IC chip, a control unit that receives a reply response from the IC chip, and a notification unit that performs notification. The said control part controls operation | movement of the said alerting | reporting part by the said reply response, and guides the pedestrian who is the holder of the said portable apparatus.

  For example, the control unit confirms the existence of the sidewalk and the current position based on a response from the IC chip. A control part alert | reports according to presence and the present position of the confirmed sidewalk, and guides a pedestrian.

(12) A pedestrian guidance system according to the present invention includes a cylindrical protective housing having an insertion hole through which a cable is inserted, an IC chip that is provided in the protective housing and performs proximity wireless communication, and the IC chip. A cable protector including an electromagnetic shield member disposed at a position between the cable, a proximity wireless communication unit that performs proximity wireless communication with the IC chip, and a control that receives a reply response from the IC chip And a portable device having a notification unit for performing notification. The said control part controls operation | movement of the said alerting | reporting part by the said reply response, and guides the pedestrian who is the holder of the said portable apparatus.

(13) A pedestrian guidance system according to the present invention includes a cable protector, a proximity wireless communication unit that performs proximity wireless communication with the IC chip, a control unit that receives a response from the IC chip, and a notification. A portable device having a notification unit for performing the above. The said control part controls operation | movement of the said alerting | reporting part by the said reply response, and guides the pedestrian who is the holder of the said portable apparatus.

(14) The notification unit may be a microphone that generates sound. The control unit determines whether the pedestrian is off the road from the reply response, and determines whether the pedestrian is off the road in the determination process. A notification process for generating a warning sound is executed.

  The control unit recognizes the presence of the IC chip, the current position, and the walking route from the reply response. The control unit determines whether or not the pedestrian of the portable device has left the sidewalk based on the presence of the IC chip, the current position, the walking route, and the like. When the control unit determines that the pedestrian has come off the sidewalk, the control unit notifies the pedestrian to that effect by a warning sound. As a result, a pedestrian can be safely guided.

(15) The notification unit may be a microphone that generates sound, and the control unit may generate a detection sound in the microphone on condition that the reply response is input.

  If the pedestrian goes off the road, the portable device will not receive a reply response. If it does so, the detection sound which has arisen until then will be interrupted. Therefore, it is possible to make the pedestrian recognize that he / she is off the sidewalk. As a result, a pedestrian can be safely guided.

  According to the present invention, it is possible to provide a cable protector and a pedestrian guidance system that can easily construct equipment for safely guiding pedestrians.

FIG. 1 is a configuration diagram of a pedestrian guidance system 10 according to the first embodiment. FIG. 2 is a perspective view of the cable protector 30 according to the first embodiment. FIG. 3 is an exploded perspective view of the cable protector 30 according to the first embodiment. FIG. 4 is a cross-sectional view of the lid 50 in the first embodiment. FIG. 5 is a flowchart of the determination / notification process 1 in the first embodiment. FIG. 6 is an exploded perspective view of the cable protector 30 according to the second embodiment. FIG. 7 is a cross-sectional view of the cable protector 30 according to the second embodiment. FIG. 8 is a perspective view of the lid 57 in the first modification. FIG. 9A is a cross-sectional view of the lid 70 according to the second modification, FIG. 9B is an exploded cross-sectional view of the lid 70, and FIG. 9C is a perspective view of the substrate 71. FIG. 10 is a flowchart of the determination / notification process 2 in the fourth modification. FIG. 11 is a block diagram of the first embodiment, the second modification, and the fourth modification. FIG. 12 is a perspective view of the cable protector 110 according to the third embodiment. FIG. 13 is a longitudinal sectional view of the first main body 34 </ b> A and the connection body 60. FIG. 14A is a longitudinal sectional view in which a part of the male insertion slot 13 is enlarged, and FIG. 14B is a longitudinal sectional view in which a part of the female receptacle 12 is enlarged. FIG. 15A and FIG. 15B are perspective views showing a state in which the connection body 60 is disassembled with respect to the pair of first main bodies 34A fitted and connected in the third embodiment. FIG. 16 is a vertical cross-sectional view of a connecting portion in a state where adjacent first main bodies 34A in the third embodiment are connected to each other. FIG. 17 is an enlarged vertical cross-sectional view of a part of a connecting portion between adjacent first main bodies 34A in the third embodiment. FIG. 18 is a longitudinal sectional view of the second main body 35A in the third embodiment. FIG. 19 is an enlarged longitudinal sectional view of a part of the second main body 35A in the third embodiment. FIG. 20 is a perspective view of a cylinder 11D provided in the second main body 35A in the third embodiment. FIG. 21 is a longitudinal sectional view of the first main body 34A in the fifth modification. 22A to 22D are side views of pipe joints 140A to 140D used as the first pipe body 11C of the first body 34A. FIG. 23A is a perspective view of the cable protector 112 according to the fourth embodiment, and FIG. 23B is an exploded perspective view of the protective housing 90 according to the fourth embodiment.

  [First embodiment]

  As shown in FIG. 1, the pedestrian guidance system 10 includes a portable device 20 carried by a pedestrian and a cable protector 30 laid on the ground or on the ground surface. The cable protector 30 is buried in a relatively shallow position (depth of about 30 cm or less) in the ground or laid on the ground surface. In the illustrated example, the cable protector 30 is buried in the ground. The cable protector 30 protects the cable 32 from soil and water. The cable 32 is a power transmission cable, a communication cable such as an optical fiber, or the like.

  The cable protector 30 includes a plurality of IC chips 40 that perform close proximity wireless communication, and performs close proximity wireless communication with the mobile device 20. The portable device 20 performs proximity wireless communication with the IC chip 40 to guide the pedestrian. A detailed description will be given below.

  As shown in FIG. 2, the cable protector 30 includes a protective housing 31 and an IC chip 40 provided on the protective housing 31. The protective housing 31 is cylindrical and has an insertion hole 33 through which the cable 32 is inserted. The cable protector 30 protects the inserted cable 32 from soil and water.

  As shown in FIG. 3, the protective housing 31 is assembled by a resin-made first main body 34, second main body 35, and connection body 36. The connection body 36 is a member that connects the two first main bodies 34, the two second main bodies 35, and the first main body 34 and the second main body 35. The protective housing 31 is assembled by connecting a plurality of first main bodies 34 and a plurality of second main bodies 35 with connecting bodies 36. The number of the first main body 34 and the second main body 35 to be used is changed depending on the length of the cable 32.

  The first main body 34 is cylindrical. The second main body 35 includes a cylindrical tube portion 37 having substantially the same diameter as the first main body 34 and a box-shaped box portion 38 provided at the center of the tube portion 37. The connection body 36 has a cylindrical shape with an inner diameter that can be fitted onto the first main body 34 and the second main body 35.

  For example, the first main body 34 and the second main body 35 are coupled by providing male and female screw grooves on the inner peripheral surface of the connection body 36 and the outer peripheral surfaces of the first main body 34 and the second main body 35. Sealing members such as packing may be disposed on the contact surfaces of the first main body 34, the second main body 35, and the connection body 36 for waterproofing and dustproofing. In addition, the connection method of the 1st main body 34 and the 2nd main body 35 by the connection body 36 is not restricted to using a screw, Adhesive may be used, and what is called snap fitting using elasticity is used. Also good.

  The box part 38 of the second main body 35 is formed integrally with the cylinder part 37 at the center of the cylinder part 37. The box portion 38 has a rectangular parallelepiped shape having a maintenance window 39 on the upper surface. The maintenance window 39 exposes the cable 32 in the protective housing 31. The operator repairs or replaces the cable 32 through the maintenance window 39.

  The maintenance window 39 is closed by the lid 50 except during maintenance. The lid 50 is attached to the maintenance window 39 in a detachable (openable and closable) manner using bolts 43, nuts 44, and mounting brackets 45. More specifically, the lid 50 has a rectangular plate shape that is substantially the same size as the maintenance window 39. The lid 50 includes projecting pieces 51 that project from a pair of opposing peripheral edges. In the illustrated example, a total of six projecting pieces 51 are provided, three on each side. Each protruding piece 51 includes an insertion hole 52 through which the bolt 43 is inserted.

  The mounting bracket 45 is substantially U-shaped. For example, the mounting bracket 45 is formed by bending a metal material. The mounting bracket 45 includes flanges 46 at both ends. Each flange 46 includes an insertion hole 47 through which the bolt 43 is inserted.

  The bolt 43 is inserted into the insertion hole 52 of the lid 50, inserted into the insertion hole 47 of the mounting bracket 45 disposed below the second main body 35, and finally screwed into the nut 44. As a result, the lid 50 is attached to the second main body 35 with the maintenance window 39 closed.

  As shown in FIG. 4, the lid 50 is provided with an IC chip 40 and an electromagnetic shield member 48. The electromagnetic shield member 48 is a rectangular sheet having substantially the same shape as the lid 50. For example, the electromagnetic shield member 48 includes a base material, a metal foil attached to one surface of the base material, and an adhesive layer attached to the other surface of the base material. The metal foil is formed using a metal such as aluminum that can shield electromagnetic waves. That is, the electromagnetic shield member 48 shields electromagnetic waves.

  The IC chip 40 and the electromagnetic shield member 48 are attached to the lid 50 using the mounting plate 53. More specifically, the lid 50 is made of a resin that transmits radio waves. The lid 50 is provided with a recess 54 in the center of which the IC chip 40 is fitted. The recess 54 opens to the inside of the box portion 38 (on the cable 32 side). The lid 50 includes a screw hole 55 into which the screw 49 is screwed. In the illustrated example, the screw holes 55 are provided on both sides of the recess 54. The screw-in hole means a hole provided with a screw groove or a so-called self-tap hole in which a screw groove is formed by the screw 49 itself.

  On the other hand, the mounting plate 53 is a resin-made rectangular plate having substantially the same shape as the lid 50. The mounting plate 53 includes an insertion hole 56 through which the screw 49 is inserted. The insertion hole 56 is provided at a position corresponding to the screw-in hole 55 of the lid 50.

  After the IC chip 40 is fitted in the concave portion 54 of the lid 50, the electromagnetic shield member 48 is disposed on the opening side of the concave portion 54, the mounting plate 53 is further disposed on the electromagnetic shield member 48 side, and the mounting plate 53 is attached by the screw 49. Attach to lid 50. As a result, the IC chip 40 and the electromagnetic shield member 48 are attached to the lid 50.

  The lid 50 is attached to the maintenance window 39 of the second main body 35 with the attachment plate 53 inside (cable 32 side). Therefore, the electromagnetic shield member 48 is located between the IC chip 40 and the cable 32. The electromagnetic shield member 48 shields the electromagnetic wave emitted by the cable 32 and protects the IC chip 40 from the electromagnetic wave.

  Next, the portable device 20 will be described. As illustrated in FIG. 11, the mobile device 20 includes a proximity wireless communication unit 21 that performs proximity wireless communication with the IC chip 40, a control unit 22, and a microphone 23. The near field communication unit 21 is a so-called reader that communicates with the IC chip 40 according to, for example, the NFC communication standard.

  The IC chip 40 receives the radio wave transmitted by the proximity wireless communication unit 21 and returns a reply response. The close proximity wireless transfer unit 21 receives a reply response from the IC chip 40 and inputs the received reply response to the control unit 22.

  The microphone 23 is a notification unit that converts an input audio signal into a sound, and generates a warning sound or the like.

  The control unit 22 is, for example, a microcomputer, and performs various calculations and output of audio signals. The control unit 22 receives the above reply response from the close proximity wireless transfer unit 21. The control part 22 performs the judgment and alerting | reporting process 1 shown by FIG. 5 using the input reply response, and guides a pedestrian. The details will be described below.

  The control unit 22 waits until a reply response is input (S11: No). When a reply response is input (S11: Yes), the controller 22 starts measuring time using a timer counter (not shown) (S12). The control unit 22 resets the timer counter and restarts the time measurement every time a new reply response is input (S13: Yes). The control unit 22 monitors the input of a new reply response until the measurement time reaches a predetermined time (S13: No & S14: No). Whether or not the measurement time has reached a predetermined time is determined by whether or not the count value of the timer counter is equal to or greater than a predetermined threshold value.

  When the measurement time reaches a predetermined time (S14: Yes), the control unit 22 outputs an audio signal to the microphone 23, generates a warning sound in the microphone 23 (S15), and ends the determination / notification process 1.

  The control unit 22 performs pedestrian guidance by executing the determination / notification process 1 described above. More specifically, the pedestrian walks with the portable device 20. The pedestrian turns on the guidance function of the portable device 20. When the guidance function is turned on, the control unit 22 executes the determination / notification process 1.

  When a pedestrian walks on the sidewalk where the cable protector 30 is laid, communication is performed between the portable device 20 and the IC chip 40 of the cable protector 30, and a reply response is input to the control unit 22. The control unit 22 recognizes that the pedestrian is on the sidewalk when the reply response is input. When there is no new reply response within a predetermined time after the reply response is input, the control unit 22 determines that the pedestrian has left the sidewalk and causes the microphone 23 to generate a warning sound.

  In the first embodiment, since the IC chip 40 is originally provided on the cable protector 30 laid on the ground or on the ground surface, the IC chip 40 can be easily installed. As a result, equipment for safely guiding pedestrians can be easily constructed.

  Further, since the electromagnetic shield member 48 is provided between the IC chip 40 and the cable 32, the IC chip 40 can be protected from electromagnetic waves radiated from the cable 32.

  Further, since the IC chip 40 is disposed inside the lid 50, the IC chip 40 can be protected from water, dirt, dust, and the like.

  Further, since the IC chip 40 is always disposed on the lid 50 on the upper side, the cable protector 30 can be installed on the operator with the IC chip 40 facing upward without making the operator aware of it. As a result, the installation work of the cable protector 30 is facilitated.

  Further, since the IC chip 40 is provided on the detachable (openable and closable) lid 50, the IC chip 40 can be newly provided on the already installed cable protector 30 by replacing the lid 50. Also, maintenance work such as replacement of the IC chip 40 can be easily performed by the operator. As a result, the pedestrian guidance system 10 can be easily constructed.

  Further, in the determination / notification process 1, since a warning sound is generated when the pedestrian goes off the sidewalk, the pedestrian can be safely guided.

  [Second Embodiment]

  In the first embodiment, the configuration in which the IC chip 40 and the electromagnetic shield member 48 are provided on the lid 50 has been described. In the second embodiment, as shown in FIG. 6, a configuration in which an IC chip 40 and an electromagnetic shield member 48 are provided on the connection body 60 will be described. The configurations of the first main body 34 and the second main body 35 are the same as those in the first embodiment except that the IC chip 40 is not provided on the lid 50. Moreover, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The connection body 60 has the same outer shape as the connection body 36. The connection body 60 includes a first half body 61 and a second half body 62 that are formed by equally dividing the connection body 60 along the axial direction. The first half 61 and the second half 62 are made of resin and have substantially the same shape.

  The first half 61 and the second half 62 are coupled using a bolt and a nut (not shown). More specifically, the first half 61 includes first flanges 63 at both ends in the circumferential direction. In FIG. 6, the first flange 63 on only one side appears. The first flange 63 has an insertion hole 64 through which a bolt is inserted. In the illustrated example, three insertion holes 64 are provided in the two first flanges 63, respectively.

  On the other hand, the second half 62 includes second flanges 65 at both ends in the circumferential direction. The second flange 65 has a bolt hole 66 through which a bolt is inserted. The bolt hole 66 is provided at a position corresponding to the insertion hole 64. After the bolt is inserted into the insertion hole 64, the bolt is inserted into the bolt hole 66 and finally screwed into the nut. As a result, the first half 61 and the second half 62 are joined.

  The first flange 63 of the first half 61 includes a recess 67 into which the IC chip 40 is fitted. The recess 67 opens to the contact surface side with the second flange 65. After the IC chip 40 is fitted in the recess 67, the first half 61 and the second half 62 are coupled, whereby the IC chip 40 is held by the connection body 60. Note that the recess 67 may be provided in the second flange 65. Further, the recess 67 may be provided in both the first flange 63 and the second flange 65.

  As shown in FIG. 7, the electromagnetic shield member 48 is disposed between the first main body 34 and the second main body 35 and the connection body 60. The electromagnetic shield member 48 is held by being sandwiched between the first body 34 and the second body 35 and the connection body 60. The electromagnetic shield member 48 arranged in this way is located between the IC chip 40 and the cable 32. Therefore, the electromagnetic shield member 48 shields the electromagnetic wave emitted by the cable 32 and protects the IC chip 40 from the electromagnetic wave. The electromagnetic shield member 48 may be attached to the inner peripheral surfaces of the first main body 34 and the second main body 35.

  In the second embodiment, since the IC chip 40 is sandwiched between the first half 61 and the second half 62 to be joined, the IC chip 40 can be held and protected without using an attachment member. Further, since only the recess 67 is formed, the IC chip 40 can be attached to the conventional cable protector only by modifying the existing mold.

  [Modification 1]

  In the first modification, a configuration in which an antenna 42 (FIG. 8) that increases the reception sensitivity of the IC chip 40 is further provided in the first embodiment will be described. In addition, in this modification 1, since it is the same as that of 1st Embodiment except the cover 57 being used instead of the cover 50 in 1st Embodiment, description of structures other than the cover 57 is abbreviate | omitted. Furthermore, in the cover 57, the same code | symbol is attached | subjected about the structure same as the cover 50 demonstrated in 1st Embodiment, and description is abbreviate | omitted.

  As shown in FIG. 8, the lid 57 is a rectangular plate having the same shape as the lid 50, and includes a protruding piece 51, a recessed portion 54, and a screw hole 55. The lid 57 further includes a first groove 58 and a second groove 59 in which the antenna 42 is disposed.

  The first groove 58 is a groove extending linearly from the recess 54 toward the periphery of the lid 57. The second groove 59 is a substantially circular groove extending along the periphery of the lid 57. The first groove 58 and the second groove 59 are coupled.

  The antenna 42 is formed by a conducting wire such as an enameled wire or a copper wire. Both ends of the antenna 42 are connected to the IC chip 40 and are fitted into the first groove 58 and the second groove 59. That is, the antenna 42 is a so-called loop antenna.

  After the IC chip 40 is fitted into the recess 54 and the antenna 42 is fitted into the first groove 58 and the second groove 59, the electromagnetic shield member 48 is disposed, and the attachment plate 53 is attached to the lid 57. As a result, the IC chip 40, the antenna 42, and the electromagnetic shield member 48 are attached to the lid 57.

  In the first modification, the reception sensitivity of the IC chip 40 is increased by the antenna 42.

  In the first modification, an example in which the antenna 42 is a loop antenna has been described. However, the antenna may be another type of antenna such as a pole antenna.

  In the first modification, an example in which the antenna 42 is formed of a conductive wire has been described. However, the antenna 42 may be formed of a pattern foil. For example, the antenna 42 may be formed by a pattern foil deposited on the mounting plate 53.

  In the first modification, the example in which the IC chip 40 and the antenna 42 are provided on the lid 57 has been described. However, for example, a lid 57 (without the IC chip 40) is provided on the second main body 35 in the second embodiment, and the IC chip 40 provided on the connection body 60 and the antenna 42 provided on the lid 57 are connected by a connection line. It may be connected.

  In the first modification, the configuration in which the antenna 42 is provided on the lid 57 has been described. However, the antenna may be installed on the ground surface, and the antenna installed on the ground surface and the IC chip 40 may be connected by a connection line. . In this case, the wiring hole 73 shown in FIGS. 9A and 9B is provided in the lid 50, and the connection line is inserted through the wiring hole 73.

[Modification 2]

  In the second modification, a configuration in which a so-called solar cell is provided on the cable protector 30 will be described. The second modification is the same as the first embodiment except that the lid 70 and the substrate 71 shown in FIG. 9 are used instead of the lid 50 and the mounting plate 53 shown in FIG. 4 in the first embodiment. Therefore, description of components other than the lid 70 and the substrate 71 is omitted. Furthermore, in the lid | cover 70, about the structure same as the lid | cover 50 demonstrated in 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The lid 70 has the same configuration as the lid 50 except that the display window 72, the wiring hole 73, and the support rib 79 are provided. The support rib 79 is an annular rib protruding from the surface on the concave portion 54 side (the lower surface in FIG. 9), and surrounds the concave portion 54. As shown in FIG. 9A, the substrate 71 is brought into contact with the protruding tip of the support rib 79. The support rib 79 creates a gap between the substrate 71 and the lid 70. In this gap, the light emitting diode 77 and the like mounted on the substrate 71 are located. That is, the support rib 79 functions as a spacer.

  The display window 72 is a hole that penetrates the lid 70 in the thickness direction of the lid 70. The display window 72 emits the light from the light emitting diode 77 to the outside. A transparent sheet 74 is stuck on the upper side of the display window 72 for waterproofing.

  The wiring hole 73 passes through the side wall of the recess 54, and extends from the inner surface of the recess 54 to one surface of the lid 70 (upper surface in FIG. 9, hereinafter referred to as “upper surface”) along the inner bottom surface. A connection line 75 is inserted into the wiring hole 73. One end of the connection line 75 is connected to the photoelectric element 76 fixed to the upper surface of the lid 70 using an adhesive or the like. The photoelectric element 76 is an element that converts light incident on the bonding surface into electrons (current). For example, a semiconductor having a pn junction is used as the photoelectric element 76. For waterproofing, after the connecting wire 75 is inserted, the wiring hole 73 is filled with a sealing member such as silicon.

  The other end of the connection line 75 is connected to the substrate 71. The board 71 has the same shape as the mounting plate 53 (FIG. 4) and includes an insertion hole 56 through which the screw 49 is inserted. An IC chip 40 is surface-mounted on the center of one surface of the substrate 71 (the upper surface in FIG. 9, hereinafter referred to as “upper surface”). A light emitting diode 77 is mounted on the upper surface of the substrate 71. The light emitting diode 77 is, for example, a chip LED.

  Further, as shown in FIG. 9C, an antenna 78 is formed on the upper surface of the substrate 71 by a pattern foil. In the illustrated example, the antenna 78 is a loop antenna.

  In addition, a power storage element 81 shown in FIG. 11 is mounted on the substrate 71. The power storage element 81 is a large-capacity capacitor or a rechargeable battery. The power storage element 81 charges the current output from the photoelectric element 76.

  In addition, various electronic components such as resistors, capacitors, and diodes that form the drive circuit 82 shown in FIG. 11 are mounted on the substrate 71. The drive circuit 82 turns on the light emitting diode 77 using the current output from the power storage element 81 as a drive source. The drive circuit 82 is, for example, a constant voltage circuit.

  An electromagnetic shield member 48 is attached to the other surface of the substrate 71 (the lower surface in FIG. 9).

  The substrate 71 is disposed such that the IC chip 40 fits into the recess 54 and the light emitting diode 77 faces the display window 72, and is attached to the lid 70 by a screw 49.

  The cable protector 30 of the second modification is laid on the ground surface. That is, the photoelectric element 76 is irradiated with sunlight. The photoelectric element 76 generates power upon receiving sunlight. The electric power generated by the photoelectric element 76 is stored in the power storage element 81. The electric power stored in the storage element 81 lights the light emitting diode 77 at night. Light from the light emitting diode 77 is emitted to the outside through the display window 72. The light emitted to the outside can make the pedestrian recognize the position of the sidewalk.

  Note that a light diffusion sheet may be used instead of the transparent sheet 74 so that a pedestrian can easily see the light emitted from the light emitting diode. Moreover, surface light emission may be performed using a light-guide plate.

[Modification 3]

  In the third modification, an example in which a pedestrian is guided by a detection sound generated by the microphone 23 will be described. Configurations other than those detailed below are the same as those in the first embodiment, the second embodiment, the first modification, and the second modification.

  The control unit 22 outputs an audio signal to the microphone 23 each time a reply response is input from the close proximity wireless communication unit 21, and causes the microphone 23 to generate a detection sound. The detection sound allows the pedestrian to recognize that he is on the sidewalk and has left the sidewalk.

  More specifically, the pedestrian recognizes that he / she is on the sidewalk by the detection sound. When the pedestrian moves off the sidewalk, the detection sound that has been generated until then stops. Then, the pedestrian recognizes that he / she has left the sidewalk. A pedestrian who recognizes that he / she has deviated from the sidewalk moves in search of a place where detection sound is generated. As a result, it is possible to prevent the pedestrian from greatly leaving the sidewalk. That is, a pedestrian is guided.

[Modification 4]

  In the fourth modification, as illustrated in FIG. 11, the IC chip 40 includes a storage unit 41, and the configuration in which the position information of the installation position where the IC chip 40 is installed is stored in the storage unit 41 is described. The Configurations other than those detailed below are the same as those in the first embodiment, the second embodiment, the first modification, the second modification, and the third modification.

  The control unit 22 executes the determination / notification process 2 shown in FIG. The control unit 22 waits until a reply response is input from the close proximity wireless transfer unit 21 (S21: No). When a reply response is input (S21: Yes), the control unit 22 acquires position information included in the reply response (S22). The control unit 22 determines whether or not the pedestrian is on the planned route from the acquired position information (S23). The planned route is set by the pedestrian or set by the control unit 22 according to the destination set by the pedestrian. Whether or not the pedestrian is on the planned route is determined based on, for example, whether or not the distance between the current position and the planned route is a predetermined value or more.

  When determining that the pedestrian is on the planned route (S23: Yes), the control unit 22 waits until a reply response is input again (S21: No). When the control unit 22 determines that the pedestrian has deviated from the planned route (S23: No), the control unit 22 outputs an audio signal to the microphone 23 to generate a warning sound.

  In the fourth modification, the pedestrian can walk to the destination without departing from the route by setting the destination and the planned route. That is, pedestrian guidance is performed.

[Other variations]

  In the first embodiment, the configuration in which the mounting plate 53 is attached to the lid 50 by the screw 49 has been described. However, the mounting plate 53 may be attached to the lid 50 using other fixing tools such as bolts and nuts. In addition, the mounting plate 53 may be attached to the lid 50 by snap fitting so that a resin claw is provided on the lid 50 or the mounting plate 53. The mounting plate 53 may be fixed to the lid 50 using an adhesive. The mounting plate 53 may be fixed to the lid 50 by a resin mold. However, it is desirable that the IC chip 40 be detachable in consideration of maintenance and replacement of the IC chip 40. That is, it is preferable to use a screw 49, a bolt and a nut, or a snap fit. Furthermore, screws 49, bolts and nuts are more preferable. More specifically, when the screw 49, the bolt, and the nut are used, it is only necessary to provide a hole in the lid 50. Providing a hole in the lid 50 can be realized only by standing a pin on the mold. That is, the lid 50 can be manufactured by diverting an existing mold. Furthermore, by replacing the pins, it is possible to manufacture both the lid 50 with holes and the lid without holes with a single mold.

  In the above-described embodiments and modifications, the microphone 23 has been described as an example of the notification unit. The notification unit may be a display, for example. The control unit 22 displays a warning display or a detection display on the display instead of the warning sound or the detection sound or together with the warning sound or the detection sound. The warning display and detection display are characters and figures.

  [Third embodiment]

  As shown in FIG. 12, the cable protector 110 according to the third embodiment includes a first main body 34 </ b> A, a second main body 35 </ b> A, and a connection body 60. FIG. 12 is a perspective view showing a state in which the first main body 34A and the second main body 35A are connected along the longitudinal direction. In the figure, two first main bodies 34A, a second main body 35A and a first main body 34A are connected in order from the left front side in the figure.

  The cable protector 110 is suitable when a power transmission cable, a communication cable, an optical fiber cable, and other cables are buried in a relatively shallow position (depth of about 30 cm or less) in the ground or laid on the ground surface. Used for.

  FIG. 13 is a longitudinal sectional view of the first main body 34 </ b> A and the connection body 60.

  The first main body 34A shown in FIG. 13 has a cable (not shown) inserted therein. The first main body 34A includes a first tube main body 11C, and a male insertion port 13 and a female receiving port 12 are formed in the first tube main body 11C.

  The first tube body 11C is configured in a straight tube shape. The male insertion port 13 is formed integrally with the first tube main body 11C at one end of the first tube main body 11C, that is, at one end side (left side in the drawing) in the longitudinal direction (the direction along the axial center line CL1). ing. The female receptacle 12 is formed integrally with the first tube main body 11C at the other end of the first tube main body 11C (on the right side in the direction along the axial center line CL1 in the drawing).

  A flange-shaped reinforcing rib 11S is formed at a substantially central portion in the longitudinal direction of the first tube main body 11C. The reinforcing rib 11S protrudes in the radial direction at a certain height from the outer peripheral surface of the first tube main body 11C, and is continuous over the entire circumference. The height of the reinforcing rib 11S is set to 2 mm, for example. Such a reinforcing rib 11S may be omitted. As for the outer diameter, inner diameter, and thickness of the first tube body 11C, for example, the outer diameter can be set to 100 mm, the inner diameter to 90 mm, and the thickness to 5 mm.

  14A and 14B are enlarged views of main parts of the first pipe body 11C.

  The inner diameter of the male insertion port 13 is constant (see FIG. 13). As shown in FIG. 14A, the outer peripheral surface 13A of the male insertion slot 13 bulges outward in the radial direction, and the vicinity of the tip of the male insertion slot 13 is formed in a substantially wedge shape. Has been. A first groove 13B is continuously provided on the outer peripheral surface 13A of the male insertion opening 13 over the entire circumference.

  The depth of the first groove 13B is constant, and a first O-ring 131 made of rubber that can be elastically deformed is mounted inside the first groove 13B. The outer diameter of the first O-ring 131 is set larger than the inner diameter of the female receptacle 12 provided at the other end of the first pipe body 11C. The first O-ring 131 is fitted and positioned in the first groove 13B. The first O-ring 131 circulates around the outer peripheral surface 13A of the male insertion port portion 13, and the outer edge of the first O-ring 131 protrudes radially outward from the outer peripheral surface 13A of the male insertion port portion 13.

  A second groove 13 </ b> D is provided on the distal end surface 13 </ b> C of the male insertion opening 13. The second groove portion 13D circulates around the distal end surface 13C around the axial center line CL1 of the first tube main body 11C. A second O-ring 132 made of rubber that can be elastically deformed is fitted into the second groove 13D. The second O-ring 132 protrudes from the distal end surface 13 </ b> C of the male insertion opening 13.

  A flange-shaped first displacement guide portion 14 is provided in the male insertion port portion 13. The first displacement guide portion 14 is provided at a position away from the distal end surface 13C of the male insertion port portion 13 by a predetermined distance, and protrudes radially outward. One surface 14A of the first displacement guide portion 14 (the surface on the distal end surface 13C side) is a flat surface along a direction orthogonal to the axial center line CL1 of the first tube main body 11C. In the present specification, the one surface 14 is referred to as a “flat surface 14A”. The other surface 14B of the first displacement guide portion 14 (the surface on the female die receiving portion 12 side) is formed into a curved surface. In the present specification, the other surface 14B is referred to as a “first guide curved surface 14B”. The first guide curved surface 14B is constituted by a part of a virtual spherical surface whose center is located on the axial center line CL1 of the first main body 34A.

  The first displacement guide portion 14 forms a pivot together with a second displacement guide portion 120B (see FIG. 13) described later. As will be described in detail later, in a state where the male insertion opening 13 and the female receiving opening 12 are fitted and connected to each other, both can be flex pivot displaced.

  As shown in FIG. 13, the female receiving part 12 has a cylindrical shape and is formed integrally with the first pipe body 11C. The central axis of the female receptacle 12 coincides with the central axis (the axis core line CL1) of the first tube body 11C and the male insertion slot 13, and the inner diameter and the outer diameter of the female receptacle 12 are It is set to be larger than the outer diameter and inner diameter of one tube body 11C. As shown in FIG. 14 (B), a step portion 15 is formed between the inner peripheral surface 12A of the female receptacle 12 and the inner peripheral surface 11Y of the first tube main body 11C.

  The length L1 along the axial center line CL1 of the female mold receiving portion 12 is longer than the length L2 along the axial center line CL1 of the arc-shaped portion of the male insertion port portion 13.

  As shown in FIG. 14B, the third groove portion 12H is provided on the inner peripheral surface 12A of the female receptacle 12. The third groove portion 12H is formed in an annular shape over the entire circumference of the inner peripheral surface 12A. The depth of the third groove portion 12H is constant, and the groove width (the length along the axial center line CL1) is larger than the groove width of the first groove portion 13B provided in the male insertion port portion 13.

  A ring-shaped rubber plate 12J is fitted in the third groove portion 12H. The rubber plate 12J has a rectangular cross section and is positioned in a state in which a part protrudes from the third groove portion 12H. That is, the rubber plate 12J goes around the inner peripheral surface 12A of the female receiving portion 12 and protrudes radially inward from the inner peripheral surface 12A.

  A male screw 12 </ b> B is formed on the outer peripheral surface of the female receiving part 12. A flange 12C is provided at the boundary between the female receiving part 12 and the first pipe body 11C. The flange 12 </ b> C protrudes radially outward from the outer peripheral surface of the female receptacle 12. The flange 12C functions as a stopper that restricts tightening of the connection body 60 described later.

  A locking groove 12G is provided adjacent to the flange 12C. The locking groove 12G is an annular groove that is formed in a part of the flange 12C and circulates around the flange 12C. The locking groove 12G is used to prevent the connection body 60 from loosening as will be described later. In this embodiment, the locking groove 12G is formed in the flange 12C, but it may be formed in another part of the female receiving part 12.

  For example, the inner diameter and the outer diameter of the female receptacle 12 are set to 106 mm and 116 mm, and the wall thickness is set to 5 mm as in the first main body 34A. Further, the length (length along the axial center line CL1) L1 of the female receiving portion 12 is set to 36 mm, for example. However, it is not limited to these dimensions, and is appropriately changed depending on the size of the cable to be inserted. The first tube main body 11C, the female receiving port 12 and the male insertion port 13 are made of a resin such as PE (polyethylene) or POM (polyoxymethylene), and are typically integrally formed by injection molding. . In addition, 11C of 1st pipe | tube main bodies, the female type | mold receptacle part 12, and the male insertion part 13 may be comprised with metal other than resin.

  As shown in FIG. 13, the connection body 60 has a cylindrical shape and is fitted to the outside of the female receiving portion 12.

  15A and 15B are perspective views for explaining the configuration of the connection body 60. FIG.

  As shown in FIGS. 15A and 15B, the connection body 60 includes a pair of first half body 61 and second half body 62 that can be divided into two. The first half body 61 and the second half body 62 have a semi-cylindrical shape, and the cylindrical connection body 60 is assembled by abutting and joining the respective openings.

  As shown in FIG. 13, the second displacement guide portion 120 </ b> B is formed on the other end side of the connection body 60. The second displacement guide portion 120B protrudes radially inward over the entire circumference. The second displacement guide portion 120B has an annular shape, and an opening 120C is formed at the center thereof. The inner diameter of the opening 120 </ b> C is larger than the maximum outer diameter of the male insertion port 13.

  As shown in FIGS. 15 (A) and 15 (B), a half circumference portion of the second displacement guide portion 120 </ b> B is formed at the other end of each of the first half 61 and the second half 62. . Half-circumferential portions of the second displacement guide portion 120B are continuous in a state where the first half body 61 and the second half body 62 are abutted with each other and assembled to the connection body 60, and the annular second displacement guide portion 120B. Configure. The opening 120C is formed at the center of the second displacement guide 120B.

  As shown in FIG. 13, the second displacement guide portion 120B includes a second guide curved surface 120E. The second guide curved surface 120E is configured by the inner surface of the second displacement guide portion 120B and is curved in a spherical shape. The curvature of the second guide curved surface 120E corresponds to the curvature of the first guide curved surface 14B (see FIG. 14A) provided in the male insertion slot 13.

  As shown in FIG. 15, the second half 62 is formed with a half circumference portion of the second guide curved surface 120 </ b> E. The first half 61 is also formed with a half circumference portion of the second guide curved surface 120E. The first half body 61 and the second half body 62 are abutted with each other to assemble the connection body 60, whereby a second guide curved surface 120E that is continuous in the circumferential direction is formed.

  As shown in FIG. 13, a female screw 120 </ b> A is formed on the inner peripheral surface of the connection body 60. As shown in FIGS. 15 (A) and 15 (B), a half-circumferential portion of the female screw 120A is formed on the inner peripheral surfaces of the first half 61 and the second half 62, respectively. The first half body 61 and the second half body 62 are abutted with each other and the connecting body 60 is assembled, whereby a female screw 120A continuous in the circumferential direction is formed.

  As shown in FIG. 13, a protrusion 120 </ b> F is formed on one end side of the connection body 60. The protrusion 120F protrudes inward in the radial direction of the connection body 60, and is formed in an annular shape over the entire circumference. As shown in FIG. 15A and FIG. 15B, a half circumference portion of the protrusion 120 </ b> F is formed at one end of each of the first half 61 and the second half 62. The first half body 61 and the second half body 62 are butted against each other and the connection body 60 is assembled, whereby a protrusion 120F continuous in the circumferential direction is formed.

  Each of the first half 61 and the second half 62 is provided with a ridge 120D. Each ridge 120D is disposed at the circumferential center of the first half 61 and the second half 62, and extends in the direction of the axis CL1. Further, the first half 61 includes a first flange 63 on the surface facing the second half 62. On the other hand, the second half 62 includes a second flange 65 on the surface facing the first half 61. The first half body 61 and the second half body 62 are butted against each other and the connecting body 60 is assembled, whereby the ridge 120D is formed. That is, on the outer peripheral surface of the assembled connecting body 60, four ridges 120D, each along the axial center line CL1, are formed in a state where a certain interval is provided in the circumferential direction.

  As shown in FIG. 15, the second flange 65 provided in the second half 62 is provided with three insertion holes 66 through which bolts (not shown) are inserted.

  As shown in FIGS. 15A and 15B, the first flange 63 is provided with three insertion holes 64 through which bolts (not shown) are inserted. These are arranged at positions corresponding to the respective insertion holes 66. The bolts inserted through the insertion hole 64 and the insertion hole 66 are screwed into the nut, whereby the first half 61 and the second half 62 are connected and fixed, and the connection body 60 is assembled.

  The first flange 63 of the first half 61 includes a recess 67 into which the IC chip 40 is fitted. The recess 67 opens to the contact surface side with the second flange 65. After the IC chip 40 is fitted in the recess 67, the first half 61 and the second half 62 are coupled, whereby the IC chip 40 is held by the connection body 60.

  The electromagnetic shield member 48 (FIG. 7) is disposed between the first body 34 </ b> A and the second body 35 </ b> A and the connection body 60. The electromagnetic shield member 48 is held by being sandwiched between the first main body 34 </ b> A and the second main body 35 </ b> A and the connection body 60. The electromagnetic shield member 48 arranged in this way is located between the IC chip 40 and the cable 32. Therefore, the electromagnetic shield member 48 shields the electromagnetic wave emitted by the cable 32 and protects the IC chip 40 from the electromagnetic wave. The electromagnetic shield member 48 may be attached to the inner peripheral surfaces of the first main body 34A and the second main body 35A.

  FIG. 17 is a cross-sectional view showing a state where adjacent first main bodies 34A are connected.

  The first main body 34A having such a configuration is adjacent to and connected to the first main body 34A having the same configuration, for example. In this case, the connection body 60 is preliminarily fitted to the outside of the male insertion opening 13 provided at one end of the first main body 34A (see FIG. 17).

  The male insertion opening 13 provided at one end of the first main body 34A is inserted into the female receiving opening 12 provided at the other end of the other first main body 34A. The connection body 60 provided on one first main body 34A is screwed into the female receptacle 12 of the other first main body 34A. The connection body 60 is operated and further screwed. In this case, for example, when a jig for rotating the connection body 60 is engaged with each protrusion 120D provided on the connection body 60, the connection body 60 is easily rotated.

  When the connection body 60 is rotated, the second displacement guide portion 120B of the connection body 60 approaches the first displacement guide portion 14 of the first main body 34A. Accordingly, the second guide curved surface 120E in the second displacement guide portion 120B of the connection body 60 abuts on the first guide curved surface 14B in the first displacement guide portion 14. In this state, when the connecting body 60 is further tightened, the male insertion opening 13 provided in one first main body 34A is press-fitted into the female receiving opening 12 in the other first main body 34A. At the same time, one end surface 120H of the connection body 60 abuts on the flange 12C.

  FIG. 16 is a cross-sectional view showing a state where adjacent first main bodies 34A are connected.

  The first main body 34A having such a configuration is adjacent to and connected to the first main body 34A having the same configuration, for example. In this case, the connection body 60 is preliminarily fitted to the outside of the male insertion opening 13 provided at one end of the first main body 34A (see FIG. 16).

  The male insertion opening 13 provided at one end of the first main body 34A is inserted into the female receiving opening 12 provided at the other end of the other first main body 34A. The connection body 60 provided on one first main body 34A is screwed into the female receptacle 12 of the other first main body 34A. The connection body 60 is operated and further screwed. In this case, for example, when a jig for rotating the connection body 60 is engaged with each protrusion 120D provided on the connection body 60, the connection body 60 is easily rotated.

  When the connection body 60 is rotated, the second displacement guide portion 120B of the connection body 60 approaches the first displacement guide portion 14 of the first main body 34A. Accordingly, the second guide curved surface 120E in the second displacement guide portion 120B of the connection body 60 abuts on the first guide curved surface 14B in the first displacement guide portion 14. In this state, when the connecting body 60 is further tightened, the male insertion opening 13 provided in one first main body 34A is press-fitted into the female receiving opening 12 in the other first main body 34A. At the same time, one end surface 120H of the connection body 60 abuts on the flange 12C.

  FIG. 17 is an enlarged view of a main part in FIG.

  As shown in FIGS. 16 and 17, when the connection body 60 abuts on the flange 12C, the tightening of the connection body 60 is regulated by the flange 12C. Further, the protrusion 120 </ b> F provided on the connection body 60 is fitted into the loosening groove 12 </ b> G provided on the outer peripheral surface of the female receiving part 12. As a result, the male insertion opening 13 of one first main body 34A and the female receiving opening 12 of the other first main body 34A are fitted and connected to each other, and the first main body 34A and the first first main body 34A are connected to each other. The main body 34A is connected.

  Since the tightening of the connection body 60 is restricted in a state where the pair of first main bodies 34A are coupled, the second displacement guide portion 120B of the connection body 60 is replaced by the first displacement guide portion 14 of the first main body 34A. It is avoided that the pressure comes into contact with a predetermined pressure and the pressure becomes excessive. For this reason, the 1st displacement guide part 14 and the 2nd displacement guide part 120B which contact | connected mutually will be in a slidable contact state. That is, the male insertion opening 13 of one first main body 34A is flex pivot displaced with respect to the female receiving opening 12 of the other first main body 34A.

  Next, the second main body 35A will be described.

  FIG. 18 is a longitudinal sectional view of the second main body 35A.

  As shown in FIG. 18, a cable (not shown) is inserted through the second main body 35A. The connection body 60 has the same configuration as the connection body 60 provided in the first main body 34A. As will be described later, the second main body 35A can maintain a cable inserted through the second main body 35A.

  The second main body 35A includes a second pipe main body 11X, a male insertion opening 13 provided at one end of the second pipe main body 11X, and a female provided at the other end of the second pipe main body 11X. And a mold receiving portion 12. The male insertion opening 13 and the female receiving opening 12 of the second main body 35A have the same configuration as the male insertion opening 13 and the female receiving opening 12.

  FIG. 19 is an enlarged view of a main part of FIG. 18, and is a longitudinal sectional view in which a part of the second main body 35A in the second main body 35A is enlarged.

  As shown in FIGS. 18 and 19, the second main body 35A includes a cylindrical body 11D having a rectangular tube shape. The cylinder 11D is disposed at the center of the second main body 35A and protrudes outward in the radial direction. As shown in FIG. 18, the axial center line CL2 of the cylinder 11D is orthogonal to the axial center line CL1 of the second main body 35A.

  FIG. 20 is an enlarged perspective view of the cylinder 11D provided in the second main body 35A.

  As shown in FIG. 21, the cylindrical body 11D includes a pair of first wall surfaces 11E extending from the outer peripheral surface of the second pipe body 11X along the tangential direction of the outer peripheral surface, and the first wall surfaces 11E. A pair of second wall surfaces 11F orthogonal to each other. The pair of first wall surfaces 11E have the same shape, and the tips on the protruding sides of the pair of first wall surfaces 11E are located on the same virtual plane. The pair of second wall surfaces 11F have the same shape, and the protrusion-side tips of the second wall surfaces 11F are located on a virtual plane where the protrusion-side tips of the first wall surfaces 11E are located.

  Therefore, the end openings formed by the respective leading ends of the pair of first wall surfaces 11E and the respective leading ends of the pair of second wall surfaces 11F are located on a virtual plane, and the maintenance window 39 is formed by the end opening. Is formed. The maintenance window 39 is used in the maintenance work of the cable that passes through the inside of the second main body 35A.

  As shown in FIG. 19, a recess 11 </ b> H is formed on the peripheral edge 11 </ b> N of the maintenance window 39 over the entire circumference. A rubber third O-ring 11J as a seal member is fitted in the recess 11H.

  As shown in FIGS. 19 and 20, a rib 11K is provided on the outer peripheral side of the recessed portion 11H of the peripheral edge portion 11N. The ribs 11K are continuous on the tip surfaces of the pair of second wall surfaces 11F. On the other hand, three gaps 11M are formed in the rib 11K on the front end surfaces of the pair of first wall surfaces 11E. Each of the three gaps 11M provided in one first wall surface 11E is opposed to each of the three gaps 11M provided in the other first wall surface 11E.

  As shown in FIG. 12, a lid 50 for opening and closing the maintenance window 39 is attached on the cylinder 11D. The lid 50 includes a lid main body 50 </ b> A that is large enough to close the maintenance window 39 and a protruding piece 51. Three protruding pieces 51 are arranged on each side edge of the lid main body 50A along the longitudinal direction.

  The lid main body 50A is fitted to the inner peripheral side of the rib 11K provided on the peripheral edge portion 11N of the maintenance window 39. As shown in FIG. 19, when the lid main body 50A is fitted to the inner peripheral side of the rib 11K, the lid main body 50A is pressed against the third O-ring 11J.

  As shown in FIG. 12, each protruding piece 51 formed on the lid main body 50 </ b> A includes an insertion hole 52. When the lid main body 50A is arranged on the peripheral edge portion 11N, the protruding pieces 51 provided on the lid main body 50A are respectively outward from the gaps 11M of the ribs 11K provided on the front end surfaces of the first wall surface 11E. Protruding state.

  The lid 50 is attached to the second tube main body 11X of the second protective tube 11B by three attachment fittings 45. Each mounting bracket 45 is made of, for example, a steel material. The mounting bracket 45 has a bracket main body 45A that is curved in a U-shape. At both ends of the metal fitting main body 45A, flanges 46 that are bent outward with respect to the metal fitting main body 45A are provided. Each flange 46 is provided with an insertion hole 47.

  The flange 46 of each mounting bracket 45 is opposed to the protruding piece 51 provided on the lid 50. In such a state, the bolt 43 is inserted into the insertion hole 52 of each protruding piece 51 and the insertion hole 47 of the flange 46, and the nut 44 is screwed to each bolt 43. As a result, the lid 50 is attached to the cylinder 11D of the second pipe body 11X with the maintenance window 39 closed. At this time, the lid 50 is in pressure contact with the third O-ring 11J provided at the peripheral edge portion 11N of the cylinder 11D, and the maintenance window 39 is sealed in a liquid-tight manner by the lid 50.

  In addition, you may comprise cylinder 11D with an elastic body. In this case, it is not necessary to provide the third O-ring 11J, and the lid main body 50A and the cylinder 11D are sealed in a liquid-tight manner by pressing the lid main body 50A against the peripheral edge portion 11N of the cylinder 11D. Further, the cylindrical body 11D is not limited to a rectangular tube shape, and may be a cylindrical shape.

  The case where the second main body 35A is connected to the first main body 34A is the same as the case where the first main bodies 34A are connected to each other. That is, the male insertion opening 13 provided in the second main body 35A of the second main body 35A and the female receiving opening 12 provided in the first protection 11A of the adjacent first main body 34A are fitted together, and the connection body 60 is fitted. It is connected via. In addition, the female receiving part 12 provided in the second main body 35A and the male insertion opening 13 provided in the adjacent first main body 34A are fitted to each other and connected via the connection body 60. The connected second main body 35A and first main body 34A can be flex pivot displaced as described above.

  When maintenance work is performed on the cable inserted through the second main body 35A, the lid 50 attached to the second pipe main body 11X of the second main body 35A is removed from the maintenance window 39 by the operator. When the second main body 35A is buried in the ground, the ground is excavated so that the second main body 35A is exposed to the ground surface.

  When the mounting bracket 45 is removed, the fixing of the lid 50 to the second main body 35A is released, and the lid 50 is removed from the second main body 35A by the operator. In such a state, the maintenance window 39 of the cylinder 11D provided in the second main body 35A is opened, and the operator can perform maintenance work on the cable inserted through the second main body 35A.

  As shown in FIG. 16, when the pair of first main bodies 34A are connected to each other, the male insertion port 13 of one first main body 34A of the pair of adjacent first main bodies 34A is the other first main body 34A. Flex pivot displacement is possible with respect to the female receiving portion 12 of the main body 34A. Thereby, even when an external force is applied to the first main body 34A, damage to one or both of the first main bodies 34A is suppressed. Further, even when the first main body 34A and the second main body 35A are fitted and connected, both can be flex-pivot displaced. Thereby, damage to either one or both of the first main body 34A and the second main body 35A is suppressed.

  Since the first tube main body 11C of the first main body 34A and the second tube main body 11X of the second main body 35A are liquid-tightly connected (that is, exhibit a waterproof function), it is not necessary to be separately accommodated in a protective case. . This improves the workability for connecting the first main bodies 34A or for connecting the first main body 34A and the second main body 35A. In addition, since a protective case is not required, the economical efficiency as a cable protector is improved.

  In the present embodiment, a guide curved surface that abuts each other and guides the flex pivot displacement is formed on the first displacement guide portion 14 of the male insertion port portion 13 and the second displacement guide portion 120B of the connection body 60. . This facilitates the flex pivot displacement described above. In this case, since the second guide curved surface 120E has a concave shape corresponding to the convex first guide curved surface 14B, as shown in FIG. 8, the second guide curved surface 120E and the first guide curved surface that are in contact with each other. 14B slides smoothly. Thereby, the male insertion opening 13 and the female receiving opening 12 that are fitted and connected are more smoothly brought into sliding contact with each other, and the breakage of both is more reliably suppressed.

  As shown in FIG. 17, the first O-ring 131 provided in the male insertion port portion 13 is elastically deformed and pressed against the rubber plate 12J provided on the inner peripheral surface 12A of the female receiving port portion 12. Thereby, the elastic displacement between both is accept | permitted, ensuring the liquid-tightness of the female receiving part 12 and the male insertion part 13 which became the fitting state. As a result, the flex pivot displacement of the male insertion opening 13 with respect to the female receiving opening 12 is further smoothed.

  The second O-ring 132 provided on the distal end surface 13C of the male insertion opening 13 elastically contacts the step portion 15 formed on the inner peripheral surface of the first main body 34A. Thereby, the elastic displacement between the female receptacle part 12 and the male insertion part 13 which were mutually fitted is permitted. Also by this, the flex pivot displacement of the male insertion opening 13 with respect to the female receiving opening 12 becomes smooth.

  In addition, as shown in the figure, the protrusion 120F provided on the connection body 60 is fitted into the loosening groove 12G provided on the outer peripheral surface of the female receptacle 12 so that the connection body 60 Looseness is reliably regulated.

  As shown in FIG. 15, since the connection body 60 has a pair of first half 61 and second half 62 that can be divided into two, the pair of first half 61 and second half 62 are combined. Thus, the connection body 60 is assembled in a state where it is mounted on the first main body 34A or the second main body 35A. Therefore, workability such as attachment and replacement of the connection body 60 is improved.

  As shown in FIG. 15, the protrusions 120 </ b> D are formed along the axial direction on the outer peripheral surface of the connection body 60, so that the strength of the connection body 60 is improved and the tightening operation of the connection body 60 is easy. become.

  As shown in FIGS. 13 and 18, the female receiving part 12 and the male insertion part 13 are formed integrally with the first pipe main body 11C or the second pipe main body 11X, and thus the first pipe. The main body 11C or the second pipe main body 11X, the female receiving part 12 and the male insertion opening 13 can be integrally formed. Therefore, the first main body 34A and the second main body 35A are manufactured at low cost.

  As shown in FIG. 12, since the second main body 35A is provided with the maintenance window 39 and the lid 50 for opening and closing the maintenance window 39 on the second main body 35A, the maintenance operator removes the lid 50 and opens the maintenance window. Through 39, the maintenance work of the cable inserted through the second tube main body 11X can be easily performed.

  The maintenance window 39 is provided in the end face opening of the cylinder 11D. Thereby, the maintenance worker can perform the maintenance work of the cable through the end opening of the cylinder 11D.

[Modification 5]

  In the embodiment described above, the connection body 60 is formed by coupling the first half body 61 and the second half body 62 to each other, but is not limited to such a configuration.

  FIG. 21 is a cross-sectional view of the cable protector 111 according to this modification.

  As shown in FIG. 21, the cable protector 111 includes a first main body 34 </ b> B and a connection body 129. The first main body 34 </ b> B includes a first pipe main body 11 </ b> C, a female receiving port 12, and a male insertion port 13.

  In this modification, the connection body 129 is integrally formed of a synthetic resin (for example, vinyl chloride), and the protrusion 120D (see FIG. 15) is not provided. The connection body 129 of this modification has the same configuration as that of the connection body 60 of the third embodiment except for the above.

  The connecting body 129 is molded in a state in which it is fitted and attached to the male insertion port 13 provided in the first main body 34A. For this purpose, for example, in one mold, a molded body corresponding to the internal shape of the connection body 129 around the male insertion opening 13 having the first displacement guide portion 14, and the molded body is connected to the connection body. The connecting body used as the internal mold of 129 is molded at the same time. That is, the male insertion slot 13 having the first displacement guide portion 14 is arranged in the mold, and a shape corresponding to the internal shape of the connection body 129 is formed around the male insertion slot 13 by, for example, ABS resin. A molded body is molded, and at the same time, the connecting body 129 is molded by, for example, vinyl chloride. Thereafter, the molded body made of ABS resin is removed from the male insertion slot 13 to form the connection body 129 fitted and attached to the male insertion slot 13.

[Modification 6]

  In the first main body 34A, the first tube main body 11C, the female receiving portion 12 and the male insertion opening 13 are not limited to being integrally formed with the same resin. For example, the first tube body 11C and the female receiving port 12 may be formed of a hard synthetic resin, and the male insertion port 13 may be formed of an elastic body. In this case, the male insertion port 13 is integrally connected to the first tube body 11C. The outer peripheral surface of the male insertion opening 13 that is an elastic body is elastically pressed against a rubber plate 12J provided on the inner peripheral surface of the female receiving opening 12. Therefore, without using the first O-ring 131, the female receiving part 12 and the male insertion part 13 are fitted elastically and fluid-tightly.

  Moreover, the structure which the rubber plate 12J is not provided in the female-type receptacle part 12 may be sufficient. In this case, the outer peripheral surface of the male insertion port portion 13 that is an elastic body is brought into pressure contact with the inner peripheral surface of the female receiving port portion 12, and both are brought into elastic and liquid-tight contact. Furthermore, the female receiving part 12 may be constituted by an elastic body.

  Note that the same design change is possible in the second main body 35A, and the second pipe main body 11X (FIG. 20), the female receiving portion 12 and the male insertion portion 13 are integrally formed by the same resin. It is not restricted to the structure shape | molded by.

[Modification 7]

  An existing pipe joint (general-purpose product) can be used as the first pipe body 11C of the first body 34A.

  22A to 22D are side views of pipe joints 140A to 140D used as the first main body 34A.

  A pipe joint 140A shown in FIG. 22A includes a straight tubular joint body 141A and receiving ports 142 provided at both ends of the joint body 141A. When such a pipe joint 140A is used as the first pipe body 11C, the female receptacle part 12 and the male insertion part 13 are respectively connected to the receptacle parts 142 provided at both ends of the joint body 141A. By being connected, the first main body 34A is obtained. In addition, although the external thread is formed in the said receptacle part 142, this male screw may be abbreviate | omitted and the said female-type receptacle part 12 and the said male insertion part 13 may be connected to the said receptacle part 142.

  A pipe joint 140B shown in FIG. 22 (B) has a branch pipe 143 connected to the center of a straight tubular joint body 141A. Receiving port portions 142 are provided at both ends of the joint main body 141 </ b> A, and the receiving port portions 142 are also provided at the distal end portion of the branch pipe 143. Even in such a pipe joint 140B, the female receiving part 12 and the male insertion part 13 are respectively connected to the receiving parts 142 at both ends of the joint main body 141A. In addition, the female receiving port 12 or the male insertion port 13 is integrally connected to the receiving port 142 of the branch pipe 143. Thereby, the first main body 34A is formed. In addition, although the external thread is formed in the said receptacle part 142, of course, this external thread may be abbreviate | omitted.

  A pipe joint 140C shown in FIG. 22 (C) is provided with a pair of branch pipes 143 branched in opposite directions at the center of a straight tubular joint body 141A. Receiving port portions 142 are provided at both ends of the joint main body 141 </ b> A, and receiving port portions 142 are also provided at the distal end portions of the branch pipes 143. In such a pipe joint 140C, the female receiving part 12 and the male insertion part 13 are integrally connected to the receiving parts 142 at both ends of the joint main body 141A, respectively. In addition, the female receiving port 12 and the male insertion port 13 are integrally connected to the receiving port 142 of each branch pipe 143. Thereby, the first main body 34A is formed. In addition, although the external thread is formed in the said receptacle part 142, of course, this external thread may be abbreviate | omitted.

  In addition, instead of the pipe joint 140A shown in FIG. 22 (A), as shown in FIG. 22 (D), a pipe joint 140D in which the joint main body 141D has a curved shape is replaced with the first joint 34A of the first main body 34A. It can also be used as the tube body 11C. In addition, although the external thread is formed in the said receptacle part 142, of course, this external thread may be abbreviate | omitted.

[Modification 8]

  As shown in FIG. 14, in the above-described embodiment, the second O-ring 132 is provided on the distal end surface 13 </ b> C of the male insertion slot 13. However, the second O-ring 132 is not provided. There may be. In such a configuration, when the female receptacle 12 of the other first main body 34A is inserted into the male insertion opening 13 of one first main body 34A, the male insertion of the first first main body 34A is inserted. A gap is formed between the tip surface 13C of the mouth portion 13 and the step portion 15 in the other first main body 34A. Thereby, the tolerance | permissible_range of the flex pivot displacement of the male insertion part 13 with respect to the female type receiving part 12 becomes large.

[Fourth Embodiment]

  In the first embodiment, the second embodiment, the third embodiment, and the respective modifications, the round cylindrical cable protectors 30, 110, and 111 have been described. However, the cable protector may have another tubular shape such as a square tube. In the fourth embodiment, a rectangular tube-shaped cable protector 112 shown in FIG. 23 will be described.

  As shown in FIG. 23A, the cable protector 112 includes a plurality of protective casings 90 each having a rectangular tube shape. As shown in FIG. 23B, the protective housing 90 includes an intermediate cylinder 91 and an outer cylinder 92 that houses the intermediate cylinder 91. The middle cylinder 91 has a round cylindrical shape and has an insertion hole 93 through which a cable is inserted. The outer cylinder 92 has a rectangular box shape (square cylinder shape). The outer cylinder 92 has a pair of opening 94 that exposes the insertion hole 93 of the middle cylinder 91 on each of a pair of opposite side surfaces.

  The outer cylinder 93 includes a first half 95 and a second half 96 having substantially the same shape. The first half 95 and the second half 96 are attached to each other using bolts 97 and nuts 98.

  The IC chip 40 is attached to the first half 95. The attachment structure of the IC chip 40 is the same as that of the first embodiment. Briefly, the first half 95 is provided with a recess 54 (FIG. 4) into which the IC chip 40 is fitted. After the IC chip 40 is fitted into the recess 54, the electromagnetic shield member 48 (FIG. 4) is arranged as in the first embodiment. Thereafter, the mounting plate 53 (FIG. 4) is attached to the first half 95 using the screw 49. The electromagnetic shield member 48 and the IC chip 40 are fixed to the first half body 95 by the mounting plate 53.

[Modification 9]

  In the fourth embodiment, the example in which the IC chip 40 is provided in the first half 95 has been described. The IC chip 40 may be provided on the flange as in the second embodiment. That is, the first half body 95 and the second half body 96 are provided with flanges having the same configuration as the first flange 63 and the second flange 65 (FIG. 6) of the second embodiment. The IC chip 40 is disposed in a recess provided in the flange of the first half 95 or the second half 96.

DESCRIPTION OF SYMBOLS 10 ...... Pedestrian guidance system 11C ... 1st pipe | tube main body 11D ... Cylindrical body 11X ... 2nd pipe | tube main body 12 ... Female type receptacle part 12B ... Male screw 12C ... Flange (stopper)
12G: Retaining groove 13 ... Male insertion slot 14 ... First displacement guide 14B ... First guide curved surface 20 ... Portable device 21 ... Proximity wireless communication Part 22 ... Control part 23 ... Microphone 30 ... Cable protector 31 ... Protective housing 32 ... Cable 33 ... Insertion hole 34A ... First body 25A ... second body 39 ... maintenance window 40 ... IC chip 41 ... storage unit 42 ... antenna 48 ... electromagnetic shielding member 50 ... lid 57 ... ... Lid 61 ... First half 62 ... Second half 63 ... First flange 65 ... Second flange 67 ... Recess 70 ... Lid 71 ... substrate 72 ... display window 74 ... transparent sheet 76 ... photoelectric element 77 ... light emitting diode 78 ··· Antenna 82 ··· Drive circuit 110 · · · Cable protector 111 · · · Cable protector 120A · · Female screw 120B · · Second displacement guide portion 120D · · · ridge 120E · · · second Guide curved surface 120F..Protrusion 129 ... Connector 131 ... First O-ring 132 ... Second O-ring

Claims (14)

A cylindrical protective housing having an insertion hole through which the cable is inserted;
A cable protector comprising: an IC chip that is provided in the protective housing and performs proximity wireless communication.   The cable protector according to claim 1, further comprising an electromagnetic shield member at a position between the IC chip and the cable. The protective housing is
A maintenance window exposing the cable,
A resin lid for closing the maintenance window,
The cable protector according to claim 1, wherein the IC chip is disposed inside the lid. An electromagnetic shielding member disposed inside the lid;
The cable protector according to claim 3, further comprising an attachment plate that sandwiches the electromagnetic shield member together with the lid. The protective housing includes a first half and a second half that are attached to each other;
The first half has a first flange;
The second half has a second flange secured to the first flange;
The cable protector according to claim 1 or 2, wherein at least one of the first flange and the second flange has a recess into which the IC chip is fitted. The protective housing is
A maintenance window exposing the cable,
A lid that closes the maintenance window;
6. The cable protector according to claim 1, wherein the lid includes an antenna that is electrically connected to the IC chip.   The cable protection body according to any one of claims 1 to 6, wherein the protective housing includes a wiring hole through which a connection line having one end connected to the IC chip and the other end connected to an antenna is inserted. A photoelectric element that converts light into current;
A power storage element that stores a current converted by the photoelectric element;
A drive circuit using the power storage element as a drive source;
The cable protector according to claim 1, further comprising: a light emitting diode that is turned on by the drive circuit. The protective housing is
A maintenance window exposing the cable,
A lid that closes the maintenance window;
The photoelectric element is disposed on the outer surface of the lid,
The power storage element, the drive circuit, and the light emitting diode are disposed in the protective housing,
The lid is
A display window for making the light emitting diode visible,
The cable protector of Claim 8 provided with the translucent sheet | seat which covers the said display window.   The cable protector according to claim 1, wherein the IC chip stores position information. The protective housing has one end and the other end, and includes a tube body into which a cable is inserted and a connection body externally fitted to the tube body, and one end of the adjacent tube bodies. A long cable can be surrounded by fitting and connecting the other end portion and the other end portion through the connection body,
The other end portion and one end portion of the tube main body are provided with a female receiving portion and a male insertion portion formed so as to be able to fit in an elastic and liquid tight manner corresponding to the female receiving portion. ,
A male screw is formed on the outer peripheral surface of the female receiving part, and the connection body has a female screw corresponding to the male screw,
In the female receiving part, the male insertion part is fitted to the female receiving part of the adjacent pipe body, and the connection body is screwed into a male screw formed in the female receiving part. , Having a stopper for restricting tightening of the connection body at a predetermined position,
The male insertion port portion is in contact with a predetermined portion of the connection body and the male mold in a state in which the connection body is restricted from being tightened by a stopper provided in the female reception port portion of the adjacent pipe body. The insertion port portion has a displacement guide portion that allows flex pivot displacement with respect to the female receiving portion of the adjacent tube body,
A guide curved surface formed of a part of a spherical surface that abuts each other and guides the flex pivot displacement is formed on the predetermined portion of the connection body and the displacement guide portion,
The center of the guide curved surface is located on the axial line on the one end side of the tube main body, and the projection length in the axial direction of the tube main body of the virtual line segment connecting the normal line of the guide curved surface and the center, It is arranged to be larger than the projected length in the radial direction of the pipe body of the virtual line segment,
A first O-ring that can be elastically deformed is attached to the outer peripheral surface of the male insertion opening, and the outer diameter of the first O-ring is larger than the inner diameter of the female receiving opening of the adjacent pipe body. Is set large,
The cable protector according to any one of claims 1 to 10, wherein a second O-ring that is elastically deformable is disposed so as to protrude from an end face of the male insertion slot. A cable protector according to any one of claims 1 to 11,
A close proximity wireless communication unit that performs close proximity wireless communication with the IC chip, a control unit that receives a reply response from the IC chip, and a portable device that has a notification unit that performs notification,
The said control part controls the operation | movement of the said alerting | reporting part by the said reply response, The pedestrian guidance system which guides the pedestrian who is the holder of the said portable apparatus. The notification unit is a microphone that generates sound,
The control unit
A determination process for determining whether the pedestrian is off the road from the reply response;
The pedestrian guidance system according to claim 12, wherein in the determination process, a notification process for generating a warning sound in the microphone is executed in response to determining that the pedestrian is off the road. The notification unit is a microphone that generates sound,
The pedestrian guidance system according to claim 12 or 13, wherein the control unit generates a detection sound in the microphone on condition that the reply response is input.