JP2011199966A - Structure, method, and tool for fixing cable protecting tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable-protecting tube fixing structure, and the like, that excel in workability, enable installation of a protecting tube by minimum boring, or the like, and excel in appearance.SOLUTION: A first holding portion 3 and a second holding portion 5, each have a circular-arc sectional shape. Ends of the first holding portion 3 and the second holding portion 5 are coupled with each other at a hinge portion 9. The first holding portion 3 and the second holding portion 5 are rotatable on the hinge portion 9. Engaging portions 7a, 7b is engageable with each other. When the engaging portions 7a, 7b are engaged with each other, a protecting tube holding space 19, having a substantially circular cross-sectional shape, is formed. The protecting tube-holding space 19 is a part into which a protective tube is inserted, and a recessed portion 11 is formed on the inner surface side of the first holding portion 3. The recessed portion 11 is a groove formed in part of the first holding portion 3 along the direction of the axis of a protecting tube fixing tool 1 (the direction of protecting tube insertion). A tension member 21 is fit in the recessed portion 11.

Description

  The present invention relates to a fixing structure of a cable protection tube, which is excellent in fixing workability of the protection tube and excellent in appearance.

  Conventionally, in order to lay an optical cable or the like in an apartment house or the like, it is necessary to lay a protective tube through which the optical cable is inserted into each room. Laying of the protective tube is performed by, for example, arranging a flexible protective tube on the wall surface of the building and fixing the protective tube to the wall surface. A protective tube fixing tool is used to fix the protective tube.

  As such a protective tube fixing tool, for example, there is a pipe fixing saddle comprising a saddle member for holding a pipe and a base member for fixing the saddle part to a predetermined part, and holding the pipe by the saddle part. Yes (Patent Document 1).

JP 2004-44751 A

  However, when the protective tube has flexibility, deflection occurs due to its own weight. For this reason, when trying to fix such a protective tube with a fixed saddle, it is necessary to use a large number of fixed saddles at predetermined intervals.

  On the other hand, there is a case where such a protective tube is not laid at the same time as the construction of the building but is laid later in an already populated apartment house or the like. In such a case, an operator enters the veranda etc. of each room, and after drilling holes at predetermined intervals on the wall surface, the fixed saddle is fixed to the wall surface, and a protective tube is attached to the fixed saddle. It is necessary to lay. For this reason, the work time in a veranda etc. is required, and it is necessary to go back and forth between the adjacent verandas many times.

  Some residents dislike drilling holes on the wall itself, and noise and dust during drilling are also problematic. However, when the installation amount of the fixed saddle is reduced and the installation pitch is widened, there is a problem in that the appearance of the protective tube is poor because the deflection of the protective tube is conspicuous.

  The present invention has been made in view of such problems, and provides a cable protection tube fixing structure and the like that are excellent in workability, can be laid with a minimum number of holes, and are excellent in appearance. For the purpose.

  In order to achieve the above-mentioned object, a first invention is a cable protection tube fixing structure, which is connected by a first holding portion having a substantially arc-shaped cross section, and an end portion of the first holding portion and a hinge portion. And a second holding part having a substantially arc-shaped cross section that is rotatable with respect to the first holding part with respect to the hinge part, and each of the first holding part and the second holding part Engaging portions that can be engaged with each other are provided at the ends of the first and second protection tubes having a substantially circular cross section when the first holding portion and the second holding portion are engaged with each other. A holding space is formed, and groove-shaped recesses formed on the inner surface side of at least one of the first holding portion and the second holding portion toward the outer surface side of both holding portions remain in the same shape. Using a fixture formed continuously along the axial direction, tension is applied to the concave portion in a substantially linear shape. Fitted tension members stretched, the protective tube holding space is a fixed structure of the cable protection tube, wherein a protective tube is held.

  The protective tube is a corrugated tube having a wave shape on an outer surface, and a part of the inner surface side of at least one of the first holding part or the second holding part has a cross-sectional circumference of the protective tube holding space. It is desirable that a protrusion protruding in the center direction along the direction is formed, and the protrusion is fitted into a wave valley portion on the outer periphery of the protection tube in a state where the protection tube is held in the protection tube holding space.

  The protrusions are provided in the vicinity of both ends in the axial direction of the fixture, and the protrusions are arranged on the outer circumferences of the protection tubes in a state where a pair of the protection tubes are inserted from both sides of the fixture. You may make it fit in the wave valley part.

  According to the first aspect of the invention, the groove-shaped recess formed on the inner surface side of the first holding portion or the second holding portion toward the outer surface side of the both holding portions has the same shape along the axial direction. Thus, the tension member can be fitted in the recess. For this reason, the protective tube can be suspended by the tension member. The concave shape is preferably U-shaped or horseshoe-shaped so that the tension member is difficult to come off. Further, since the first holding part and the second holding part are connected to each other by the hinge part and can be opened and closed, the protective tube can be easily held.

  Since the fixing tool of the present invention can lay a protective tube along a tension member to which tension is applied, there is no need to fix it on the wall surface, and the working time can be greatly reduced, and the fixing tool is fixed. There is no need to drill holes in the wall.

  In addition, when the protective tube is a corrugated tube, a protrusion is formed on the inner surface side of the fixture, so that the protrusion fits into the wave valley on the outer periphery of the protective tube in a state where the protective tube is held. The tube does not shift axially relative to the fixture.

  In addition, by forming the protrusions in the vicinity of both ends of the fixture, a pair of protective tubes are inserted from both sides, and each protective tube is prevented from being displaced in the axial direction by the protrusions. It can also be used as a joint between each other.

  A second invention is a method for fixing a cable protection tube, which is joined by a first holding portion having a substantially arc-shaped cross section, an end portion of the first holding portion, and a hinge portion, with the hinge portion as a base point. A second holding part having a substantially arcuate cross section that is rotatable with respect to the first holding part, and the end parts of the first holding part and the second holding part are mutually connected to each other. An engaging portion that can be engaged is provided, and when the engaging portions of the first holding portion and the second holding portion are engaged with each other, a protective tube holding space having a substantially circular cross-sectional shape is formed, At least one of the first holding part and the second holding part is provided with a fixing tool on the inner surface side and tension is applied to the tension member that is stretched substantially linearly. The fixture is attached to the tension member so as to fit into the recess, It is fitted the protection tube to serial fixture by engaging the engaging portion of one another, a method of fixing the cable protection tube, characterized in that to hold the protective tube in the protective tube holding space.

  The protective tube is a corrugated tube having a wave shape on an outer surface, and is provided on each of the inner surfaces of at least one of the first holding unit and the second holding unit in the vicinity of both ends in the axial direction of the fixture. Protrusions that protrude in the center direction along the circumferential direction of the cross section of the protective tube holding space are formed on a part of the side, and a pair of protective tubes are fitted from both sides of the fixture, and the engaging portions are By engaging, the protrusions may be fitted into the wave valleys on the outer periphery of the respective protective tubes.

  According to the second invention, since the protective tube is laid in a substantially straight line by simply attaching the protective tube to the fixing member from the state where the fixing member is attached to the tension member, the workability is excellent and the fixing member is attached to the wall surface. There is no need to fix to. Moreover, there is no need to make a hole for installing the fixture. For this reason, it is extremely excellent in workability.

  Further, by forming the protrusions on the inner surfaces near both ends of the fixture, the protective tube can be inserted and held from both sides of the fixture, and it is therefore easy to connect the protective tubes together.

A third invention is a fixture for a cable protection tube, and is joined by a first holding part having a substantially arc-shaped cross section, an end of the first holding part and a hinge part, and the hinge part is used as a base point. A second holding part having a substantially arc-shaped cross section that is rotatable with respect to the first holding part;
Each of the first holding portion and the second holding portion is provided with an engaging portion that can be engaged with each other, and the first holding portion and the second holding portion. When the engaging portions are engaged with each other, a protection tube holding space having a substantially circular cross section is formed, and both holding portions are provided on the inner surface side of at least one of the first holding portion and the second holding portion. The cable protective tube fixing device is characterized in that the groove-shaped recess formed toward the outer surface side of the cable is continuously formed along the axial direction with the same cross-sectional shape.

  A part of at least one inner surface side of the first holding part or the second holding part for holding a protective tube protruding in the central direction along the circumferential direction of the cross section of the protective tube holding space. It is desirable that a protrusion is formed.

  A base portion having a flat portion in cross section is formed in either the first holding portion or the second holding portion, and the inner surface of the base portion is formed by the first holding portion and the second holding portion. May protrude in a radial direction with respect to a virtual circle in a cross section of the protective tube holding space formed by the above.

  According to the third invention, workability is excellent, and a protective tube can be laid without making a hole in the wall surface. Further, if the protrusion is formed, the protective tube is securely held, and the protective tube is not displaced in the axial direction.

  Further, by providing the base portion, it is possible to obtain a fixture that can be used both for fixing the protective tube by the tension member and for fixing to the wall surface as in the prior art. For this reason, the usage method according to the installation place can be selected with one member.

  According to the present invention, it is possible to provide a cable protection tube fixing structure that is excellent in workability, can be laid with a minimum number of holes, and is excellent in appearance.

The perspective view which shows the protective tube fixing tool 1 of the open state. The perspective view which shows the protective tube fixing tool 1 of the closed state. The perspective view which shows the protective tube fixing tool 1 which changed the position of the recessed part. (A) is a figure which shows the protective tube fixing structure 20, (b) is the A section enlarged view of (a), (c) is the BB sectional drawing of (b). The figure which shows the state which attached the tension member 21. FIG. (A) is a figure which shows the state which attached the protection tube fixing tool 1 to the tension member 21, (b) is the C section enlarged view of (a). (A) is the figure which shows the state which laid the protective tube 23, (b) is the figure which looked at the protective tube fixture in the D part vicinity of (a) from the axial direction, (c) is the protective tube fixing of (b) The figure which shows the state which closed the tool 1. FIG. FF sectional view taken on the line of FIG.7 (c). The figure which shows the state which connected a pair of protective tube 23a, 23b with the protective tube fixing tool 1. FIG. The figure which shows the state which attached the protective tube fixture 1 to the wall surface.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 are perspective views showing the protective tube fixture 1, FIG. 1 is a view showing a state in which the protective tube fixture 1 is opened, and FIG. 2 is a state in which the protective tube fixture 1 is closed. FIG. The protective tube fixture 1 mainly includes a first holding portion 3 and a second holding portion 5 for holding the protective tube.

  The first holding unit 3 and the second holding unit 5 each have an arcuate cross-sectional shape. End portions of the first holding part 3 and the second holding part 5 are connected by a hinge part 9. The hinge part 9 is a thin part formed in the vicinity of the boundary where the first holding part 3 and the second holding part 5 are connected. The first holding part 3 and the second holding part 5 are rotatable with the hinge part 9 as a base point. That is, it can operate from the open state as shown in FIG. 1 to the closed state as shown in FIG. 2 (or vice versa).

  An engaging portion 7a having a convex cross section is formed on the inner surface side of the end portion of the first holding portion 3 (the side opposite to the hinge portion 9). In addition, an engaging portion 7b having a concave cross section is formed on the outer surface of the end portion of the second holding portion 5 (the side opposite to the hinge portion 9). The engaging portions 7a and 7b can be engaged with each other. As shown in FIG. 2, when the first holding part 3 is rotated with respect to the second holding part 5 with the hinge part 9 as a base point and the engaging parts 7a and 7b are engaged, the protective tube has a substantially circular cross section. A holding space 19 is formed. The protective tube holding space 19 is a part through which the protective tube is inserted.

  A concave portion 11 is formed on the inner surface side of the first holding portion 3. The recess 11 is a groove formed in a part of the first holding part 3 and formed along the axial direction of the protective tube fixture 1 (the insertion direction of the protective tube).

  A base 15 is formed on the lower surface of the second holding part 5. The base 15 is a portion having a flat portion 17 on the outer surface, and is a portion having a substantially U-shaped cross section with the opening side facing upward. That is, as shown in FIG. 2, when the engaging portions 7a and 7b are engaged to form a circular tube-shaped protective tube holding space 19, a virtual circle (indicated by a dotted line in FIG. 2) of the protective tube holding space 19 is formed. The bottom surface (inner surface) of the base 15 protrudes in the radial direction with respect to the circular shape formed when the inner surfaces of the first holding unit 3 and the second holding unit 5 are connected. Therefore, a space is formed between the upper surface of the base 15 and the virtual circle outer periphery of the protective tube holding space 19, so that the protective tube 23 does not contact the base 15 and the protective tube 23 is stably attached to the protective tube fixture 1. While being able to fix, it can prevent that fixing members, such as a screw which fixes protection tube fixture 1, and protection tube 23 do not contact.

In the present invention, the base 15 is not necessarily required, and the base 15 may not be formed. Moreover, the recessed part 11 may be formed not in the 1st holding | maintenance part 3 inner surface but in the inner surface of the 2nd holding | maintenance part 5, and you may form more than one. When the base 15 is formed, the base 15 and the concave portion 11 may be formed at a 90 ° portion with the protective tube fixture 1 closed.
FIG. 3 shows an example in which the concave portion 11 is formed at the second holding portion 5 at a position of approximately 90 degrees with respect to the base 15. In this way, after the tension member to be described later is attached, the tension member is sandwiched between the protective tube and the protective tube fixing tool by fitting the protective tube to the second holding portion 5, so that the engaging portion 7 a, The tension member will not come off without closing 7b. For this reason, it is easy to adjust the fixing position of the protective tube. After adjusting the fixing position of the protective tube, the protective tube and the tension member are fixed by closing the engaging portions 7a and 7b. Further, in the case of FIG. 3, when the tension member is attached to the protective tube fixture 1, the protective tube fixture 1 is pressed against the building wall by the tension member, so that the protective tube fixture 1 can be stably fixed. .

  A protrusion 13 is formed on the inner surface side of the second holding part 5. The protrusion 13 is formed in the vicinity of each end of the protective tube fixture 1 in the axial direction. The protruding portion 13 is formed with a predetermined length along the circumferential direction of the cross section of the second holding portion 5. In addition, the protrusion part 13 may be formed in the inner surface of the 1st holding | maintenance part 3, and may be formed in the multiple places of the circumferential direction. For example, each of the first holding unit 3 and the second holding unit 5 may be provided at a position facing each other when the protective tube fixture 1 is closed.

  Next, the protective tube fixing structure 20 using the protective tube fixing tool 1 will be described. 4A and 4B are diagrams showing the protective tube fixing structure 20. FIG. 4A is an overall view of a structure such as a housing complex, FIG. 4B is an enlarged view of a portion A in FIG. c) is a sectional view taken along line BB in FIG.

  In an apartment house or the like, an optical cable or the like is branched and laid in each room. An optical cable or the like is inserted into the protective tube 23. Therefore, the protective tube 23 is laid from the outside to the vicinity of the entrance of each room. The protective tube 23 is laid substantially horizontally on the same floor, and an internal optical fiber is drawn out in the vicinity of each room and drawn into each room.

  In the protective tube fixing structure 20, the tension member 21 is stretched substantially horizontally at the laying position of the protective tube 23. The tension member 21 is stretched from one end of the structure to the other end (both ends of the laying range of the protective tube 23), and both ends are joined to the structure via a turnbuckle or the like. Since tension is applied to the tension member 21, the tension member 21 is stretched substantially horizontally.

  In addition, a crest 25 and a trough 27 are repeatedly and continuously formed on the outer periphery of the protective tube 23 in the axial direction of the protective tube 23. That is, a corrugated tube is used as the protective tube 23. As the protective tube 23, for example, a polyethylene tube can be used. In addition, as the tension member 21, for example, a wire having a recess size in which a galvanized steel wire is coated with a flame retardant polyethylene coating is used. For example, a wire having an outer diameter of about 2 mm can be used.

  The protective tube fixture 1 is attached to the tension member 21 at a predetermined interval. The protective tube 23 is laid along the tension member 21. As shown in FIGS. 4B and 4C, the protective tube fixture 1 holds both the tension member 21 and the protective tube 23 in a lump. The tension member 21 is fitted in the recess 11. The diameter (width) of the recess 11 is preferably slightly smaller (about 0.01 to 0.05 mm) than the outer diameter of the tension member 21. By doing so, when the tension member 21 is fitted into the recess 11, the recess 11 (and the tension member 21) is fixed to the recess 11 by a slight elastic deformation and does not shift in the axial direction.

  The protective tube 23 is held in the protective tube holding space 19. In other words, the tension member 21 and the protection tube 23 are accommodated in the same cross-sectional closed space and held together by the protection tube fixture 1. Accordingly, the protective tube 23 is held substantially horizontally by the tension member 21.

  Next, a method for laying the protective tube 23 will be described. First, as shown in FIG. 5, the tension member 21 is stretched substantially horizontally at the laying position of the protective tube 23 in advance. At this time, as described above, the tension member 21 is given a predetermined tension and does not sag due to its own weight.

  FIG. 6A is an overall view, and FIG. 6B is a view of the protective tube fixture 1 in section C of FIG. 6A as viewed from the axial direction. As shown in FIG. 6, the protective tube fixture 1 is attached to the tension member 21. The tension member 21 is fitted in the recess 11. At this time, the engaging portions 7a and 7b are disengaged, and the protective tube fixture 1 is open.

  FIG. 7A is an overall view, and FIG. 7B is a view as seen from the axial direction in the D portion of FIG. 7A. Next, as shown in FIG. 7, the protective tube 23 is fixed to the tension member 21 while the protective tube 23 is laid along the tension member 21.

  As shown in FIG. 7B, the protection tube 23 is fixed to the protection tube fixture 1 by first fitting the protection tube 23 into the second holding portion 5 and then holding the first holding portion 3 in the second holding state. Rotate with respect to the hinge portion 9 as a base point (in the direction of arrow E in the figure), and engage the engaging portions 7a and 7b as shown in FIG. 7C. As described above, the protective tube 23 is fixed to the tension member 21 by the protective tube fixture 1. The tension member 21 is pushed into the recess 11 by the protective tube 23.

  FIG. 8 is a cross-sectional view taken along line FF in FIG. As shown in FIG. 8, when the protective tube 23 is attached to the protective tube fixture 1, the protruding portion 13 fits into the valley portion 27 on the outer periphery of the protective tube 23. For this reason, the protective tube 23 does not shift in the axial direction with respect to the protective tube fixture 1. That is, the protrusion height of the protrusion 13 is lower than the depth of the trough 27, and the distance of the protrusion 13 (arrow G in the figure) is the wave-like pitch of the protective tube 23 (the pitch between the valleys 27 (see FIG. Although it is desirable to be an integral multiple of the middle arrow H)), the distance of the protrusion 13 from the integral multiple of the corrugated pitch is within the range where the protrusion 13 fits into the trough 27. Is acceptable.

  As shown in FIG. 8, the tension member 21 fitted in the recess 11 is not dropped off by the protective tube 23. Further, since the tension member 21 is fitted into the recess 11 as described above, the tension member 21 is not displaced from the protective tube fixture 1. Further, since the tension member 21 is pushed into the recess 11 by the protective tube 23, it is possible to prevent the tension member 21 from falling off or being displaced in the axial direction.

  As described above, according to the present embodiment, when the protective tube 23 is laid, it is not necessary to drill holes in the wall surface of the structure at a predetermined interval, and it is not necessary to fix the protective tube 23 to the wall surface. Therefore, for example, when the protective tube 23 is laid in an apartment house, it is possible to greatly reduce the working time on the veranda or the like of each room. Further, since there is no need to make holes in the wall surface other than both ends for tensioning the tension member 21, there is no problem of noise or dust.

  In addition, since tension is applied to the tension member 21 and the tension member 21 is installed substantially horizontally, the protective tube 23 does not sag and is excellent in appearance.

  Further, since the recess 11 is slightly smaller in width than the outer diameter of the tension member 21, the tension member 21 receives an elastic force from the recess 21, so that it does not shift with respect to the recess 21. Further, since the protruding portion 13 fits into the valley portion 27, the protective tube 23 does not shift with respect to the protective tube fixture 1.

  Further, since the tension member 21 and the protective tube 23 are simply fitted along the groove and the engaging portion is engaged in the state where the protective tube fixing tool 1 is opened, the workability is excellent.

  In the above-described example, the protective tube fixture 1 is attached after all the tension members 21 are stretched, but the tension member 21 to which the protective tube fixture 1 is previously attached at a predetermined interval may be stretched. Moreover, although the example which installs the protective tube 23 after attaching the protective tube fixture 1 over the full length of the tension member 21 was shown, it is good also considering installation of the protective tube fixture 1 and the protective tube 23 as simultaneous progress. That is, the protective tube fixture 1 may be attached from the end side of the structure, and the protective tube 23 may be installed, and this may be repeated at predetermined intervals.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  For example, as shown in FIG. 9, the protective tube fixture 1 can also be used as a joint for connecting a pair of protective tubes 23a and 23b. In this case, the protective tubes 23 a and 23 b inserted from both ends are prevented from being displaced in the axial direction by the protrusions 13 of the protective tube fixture 1 and are held together.

  By doing in this way, since the laying and connection of the protective tube 23 can be performed only by the protective tube fixture 1, the laying workability is excellent and the appearance is also excellent.

  In addition, if the projection part 13 is formed in multiple numbers by the circumferential direction of the internal peripheral surface of the protective tube fixing tool 1, the shift | offset | difference to the axial direction of the protective tube 23 can be prevented more effectively. For this reason, it is desirable to form the protrusion 13 on the inner surfaces of both the first holding part 3 and the second holding part 5.

  Further, as shown in FIG. 10, the protective tube fixture 1 can be fixed to the wall surface 29 as in the prior art. A hole is formed in the wall surface 29 and the base 15 in advance, and the protective tube fixture 1 can be fixed to the wall surface 29 with screws 31 or the like with the flat portion 17 in contact with the wall surface 29.

  At this time, since the inner surface of the bottom surface of the base 15 protrudes in the radial direction with respect to the virtual circle of the protective tube holding space 19, the screw 31 does not interfere with the protective tube 23.

  10, most of the laying range of the protective tube 23 is laid by the tension member 21, and only a portion where the tension member 21 cannot be stretched is fixed to the wall surface, so that the laying path of the protective tube 23 can be freely set. In addition, the same protective tube fixture 1 can be used to fix the tension member 21 and the wall surface 23. Therefore, even when it is necessary to change the route for laying the protective pipe suddenly at the site, it is possible to cope with it using the same member.

DESCRIPTION OF SYMBOLS 1 ......... Protection tube fixation 3 ......... 1st holding | maintenance part 5 ......... 2nd holding | maintenance part 7a, 7b ......... engagement part 9 ......... seal member 11 ......... concave part 13 ......... projection part 15 ......... Base 17 ...... Flat part 19 ......... Protection tube holding space 21 ......... Tension member 23 ......... Protection tube 25 ......... Mountain part 27 ......... Valley part 29 ......... Wall 31 ... …screw

Claims (8)

A cable protection tube fixing structure,
A first holding portion having a substantially arc-shaped cross section, and a substantially circular cross section that is connected to an end portion of the first holding portion and a hinge portion and is rotatable with respect to the first holding portion with the hinge portion as a base point. An arc-shaped second holding part,
Engaging portions that can be engaged with each other are provided at respective end portions of the first holding portion and the second holding portion, and the first holding portion and the second holding portion are engaged with each other. When the joint portion is engaged, a protective tube holding space having a substantially circular cross-sectional shape is formed,
A groove-shaped recess formed toward the outer surface side of the holding portion on the inner surface side of at least one of the first holding portion and the second holding portion continues along the axial direction while maintaining the same cross-sectional shape. Using a fixture formed as
A cable protection tube fixing structure, wherein a tension member to which tension is applied is stretched in the recess, and a protection tube is held in the protection tube holding space. The protective tube is a corrugated tube having a wave shape on the outer surface;
A protrusion protruding in the center direction along the circumferential direction of the cross section of the protective tube holding space is formed on a part of the inner surface side of at least one of the first holding part or the second holding part,
The cable protection tube fixing structure according to claim 1, wherein the protrusion is fitted into a wave valley portion on an outer periphery of the protection tube in a state where the protection tube is held in the protection tube holding space. The protrusions are respectively provided in the vicinity of both ends in the axial direction of the fixture,
3. The cable protection tube according to claim 2, wherein the protrusion is fitted into a wave valley portion on the outer periphery of each of the protection tubes in a state where the pair of protection tubes are inserted from both sides of the fixture. Fixed structure. A method of fixing a cable protection tube,
A first holding portion having a substantially arc-shaped cross section, and a substantially circular cross section that is joined to an end portion of the first holding portion and a hinge portion and is rotatable with respect to the first holding portion with the hinge portion as a base point An arc-shaped second holding part,
Engaging portions that can be engaged with each other are provided at respective end portions of the first holding portion and the second holding portion, and the first holding portion and the second holding portion are engaged with each other. When the joint portion is engaged, a protective tube holding space having a substantially circular cross-sectional shape is formed,
A groove-shaped recess formed toward the outer surface side of the holding portion on the inner surface side of at least one of the first holding portion and the second holding portion continues along the axial direction while maintaining the same cross-sectional shape. Using a fixture formed as
The fixing member is attached to the tension member so that the tension member is fitted in the concave portion in a tension member to which tension is applied and stretched substantially linearly,
A method of fixing a cable protection tube, wherein the protection tube is held in the protection tube holding space by fitting a protection tube to the fixture and engaging the engaging portions with each other. The protective tube is a corrugated tube having a wave shape on the outer surface;
Along the circumferential direction of the cross section of the protective tube holding space, in the vicinity of both ends in the axial direction of the fixture, at least part of the inner surface side of the first holding part or the second holding part. A protrusion protruding in the center direction is formed,
The pair of the protective tubes are fitted from both sides of the fixture, and the engaging portions are engaged with each other, whereby the projections are fitted into the corrugated portions on the outer periphery of the protective tubes. Item 5. A cable protection tube fixing method according to Item 4. A cable protection tube fixture,
A first holding part having a substantially arc-shaped cross section;
A second holding part having a substantially arc-shaped cross section that is joined to an end part of the first holding part by a hinge part and is rotatable with respect to the first holding part from the hinge part;
Comprising
Engaging portions that can be engaged with each other are provided at respective end portions of the first holding portion and the second holding portion, and the first holding portion and the second holding portion are engaged with each other. When the joint portion is engaged, a protective tube holding space having a substantially circular cross-sectional shape is formed,
A groove-like recess formed toward the outer surface side of the holding portion on the inner surface side of at least one of the first holding portion and the second holding portion continues along the axial direction while maintaining the same cross-sectional shape. A cable protection tube fixture characterized by being formed as follows.   A part of at least one inner surface side of the first holding part or the second holding part for holding a protective tube protruding in the central direction along the circumferential direction of the cross section of the protective tube holding space. 7. The cable protection tube fixture according to claim 6, wherein a protrusion is formed.   A base portion having a flat portion in cross section is formed in either the first holding portion or the second holding portion, and the inner surface of the base portion is formed by the first holding portion and the second holding portion. The fixture for a cable protection tube according to claim 6 or 7, characterized by projecting in a radial direction with respect to a virtual circle in a cross section of the protection tube holding space formed by.

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