JP2007091444A - Cable drum supporting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable drum supporting device eliminating pay-out of an extra cable. <P>SOLUTION: The cable drum supporting device 30 supports a cable drum wound with a cable 10, and is provided with a device main body part 31, a shaft part 39, and a rotation control means A. The device main body part 31 includes a columnar storage part 31a capable of storing a part of the cable drum 20 therein. The shaft part 39 extends in a longitudinal direction of the storage part 31a to be fixed to the device main body part 31, and is inserted in a shaft hole 22a formed on a flange 22 so as to communicate with the inside of a winding part 21 of the cable drum 20. The rotation control means A is mounted on the device main body part 31, and is configured so as to control rotation of the cable drum 20 by being pressed on a peripheral edge of the flange 22 and rotating together with the flange 22. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cable drum support device, and more particularly to a cable drum support device that supports a cable drum around which a cable is wound.

  Conventionally, an optical cable such as an optical drop cable has been installed between utility poles. Patent Documents 1 and 2 disclose a cable drum support device that supports a cable drum around which an optical cable is wound.

  Patent Document 1 discloses a wire feeder (cable drum support device) that rotates a drum to draw an underline such as a messenger wire or a cable. The wire feeder includes a wire main body and a plurality of brakes, and each of the brakes is attached to the wire main body and applies a braking force to the rotating drum to rotate. Configured to control. And this wire feeder is comprised so that a drum may be braked with another brake, even if one of the brakes of a plurality of brakes fails. Thereby, it is described that the safety of the overhead wire laying work can be improved.

Patent Document 2 discloses a brake-equipped wire feeder that rotates a drum while applying brake braking to feed an overhead wire such as a messenger wire, a cable extension rope, or a cable. This brake-equipped feeder includes a feeder body, a brake drum, a frictional force applying portion, a band band, a fixing portion, a lever portion, and an adjustment handle. The brake drum is pivotally supported on the side of the wire main body and is fixed integrally when the drum is mounted. The frictional force applying portion is in contact with the outer peripheral surface of the brake drum. The band band is arranged along the outer peripheral surface of the brake drum, and is configured such that the frictional force applying portion is fixed. The fixing part is attached to the wire main body and fixes one end of the band. The lever portion is rotatably attached to the wire main body via a support shaft, and one end is configured to freely support the other end of the band band. The adjustment handle is disposed on the opposite side of the band with the support shaft interposed therebetween, and adjusts the tension of the band by moving the lever portion. In this brake-equipped wire feeder, the brake braking force can be adjusted by rotating the adjustment handle. Accordingly, it is described that the brake brake force can be easily adjusted in the brake-equipped wire feeder.
JP 2001-327014 A JP 2003-148521 A

  However, the techniques disclosed in Patent Documents 1 and 2 are configured such that an operator adjusts a brake. Therefore, if the operator forgets to apply the brake when the brake is to be applied, an extra cable will be unwound. The extra cable means a cable that has been unwound longer than the cable required for the erection work.

  Moreover, there is a possibility that the extra cable unwound in this way may come into contact with the ground or be wound around an object placed on the ground. As a result, the excess cable that has been unwound is damaged on the cable surface or the core wire is broken inside the cable, so that it cannot be installed between the utility poles. Therefore, the unwound cable is wasted.

  The present invention has been made in view of the above points, and the object of the present invention is to control drum rotation even when an instruction for drum rotation control is not issued by an operator, thereby unwinding an extra cable. It is to provide a cable drum support device which is not performed.

  In the cable drum support device of the present invention, flanges having a larger diameter than the cylinder are formed at both ends of the cylinder, and the cable drum around which the cable is wound is supported. An apparatus main body having a columnar accommodating portion in which at least a part of the cable drum is accommodated, a flange extending in the longitudinal direction of the accommodating portion, fixed to the apparatus main body, and communicated with the inside of the cylinder. A shaft portion that is inserted into the shaft hole, and a rotation control means that is attached to the apparatus main body portion and is pressed against the periphery of the flange to rotate together with the flange to control the rotation of the cable drum.

  In such a configuration, the rotation control means controls the rotation of the cable drum as the cable drum rotates. Therefore, the rotation of the cable drum can be controlled without an operator giving an instruction for the rotation control of the cable drum. Therefore, the convenience of the cable drum support device can be improved.

  Further, since the rotation of the cable drum can be controlled, the idle rotation of the cable drum can be prevented. As a result, unnecessary contact of the cable with the ground and entanglement with the object can be prevented. Therefore, it is possible to prevent the cable surface from being scratched or the core wire inside the cable from being cut.

  In a preferred embodiment to be described later, the rotation control means is a rod-shaped member that extends substantially parallel to the shaft portion so as to be in contact with the flange, and is configured to be rotatable in the direction opposite to the rotation direction with the rotation of the cable drum. It is a member.

  Further, in the cable drum support device of the present invention, another rod-like member extending substantially parallel to the shaft portion is provided on the opposite side across the rod-shaped member and the shaft portion, and each of the rod-shaped member and the other rod-shaped member is a first member. The urging force applied to the apparatus main body by the first and second elastic bodies is smaller than the urging force applied to the apparatus main body by another bar-shaped member. It is preferable.

  Due to the magnitude relationship of such urging forces, the other bar-like member is pressed against the flange more weakly than the bar-like member. Therefore, the other rod-shaped member controls the rotation of the cable drum slightly, and auxiliaryly controls the rotation of the cable drum.

  Further, during the work, depending on the relationship between the cable pulling speed and the length of the cable wound around the cable drum, it may be difficult to control the rotation of the cable drum. Even in this case, since another rod-shaped member is attached, it is possible to prevent the cable from protruding from the flange.

  In the cable drum support device of the present invention, the first distance changing means for changing the distance between the rod-shaped member and the shaft portion and the second distance changing means for changing the distance between another rod-shaped member and the shaft portion are further provided. It is preferable to provide.

  In such a configuration, even a cable drum having different flange outer diameters can support the cable drum.

  According to the present invention, drum rotation is controlled even if a drum rotation control instruction is not issued by an operator, so that no extra cable is unwound.

  Prior to describing the present invention, a conventional cable drum support device 90 will be described with reference to FIG. Although FIG. 7 shows a state in which the optical cable 70 is wound around the cable drum 80 seven times, it goes without saying that the number of turns is not limited.

  As shown in FIG. 7, the conventional cable drum support device 90 includes one shaft portion 91, two coupling tools 93 and 93, and two leg portions 95 and 95. Is also made of metal.

  The shaft portion 91 is formed so as to be able to be inserted into the hollow portion of the winding portion 81 of the cable drum 80 and the shaft hole of each flange 82.

  Each connector 93 is substantially T-shaped, and connects the shaft portion 91 and each leg portion 95. Specifically, the connection tool 93 includes a shaft insertion part 93a into which the shaft part 91 can be inserted, and a fitting part 93b into which the upper part of the connection tool 95 can be fitted. The joining portion 93b is arranged substantially vertically to form a T shape.

  Each leg portion 95 includes a plate-like installation portion 95a installed on the ground, and three support portions 95b, 95b, and 95b that extend from the installation portion 95a and support the cable drum 80.

  In order to lay the optical cable 70 using the conventional cable drum support device 90, first, the cable drum 80 around which the optical cable 70 is wound, the shaft portion 91, the two couplers 93 and 93, and two Are transported to the work site.

  Next, with a space slightly longer than the length of the winding portion 81 of the cable drum 80, the support portions 95b and 95b extend upward from the ground and are substantially parallel to each other. Place the installation parts 95a, 95a on the ground. And the fitting part 93b of each connection tool 93 is fitted to the upper part of each leg part 95. FIG.

  Subsequently, the cable drum is disposed between the two leg portions 95 and 95 so that the shaft portion 91 can be inserted into the hollow portion of the winding portion and the shaft hole of each flange. Thereafter, one end of the shaft portion 91 is inserted into the shaft insertion portion 93a of the connector 93 fitted to one leg portion 95, and into the hollow portion of the winding portion 81 of the cable drum 80 and the shaft hole of each flange 82. It is inserted and inserted into the shaft insertion part 93 a of the connector 93 fitted to the other leg part 95. Thereby, the optical cable 70 can be unwound from the cable drum 80.

  However, the conventional cable drum support device 90 has the following two problems.

  The first problem is that the cable drum support device 90 must be assembled at the work site. That is, the cable drum 80, the shaft portion 91, the two connecting members 93 and 93, and the two leg portions 95 and 95 must be transported to the work site. And since none of them are lightweight, they cannot be transported by one person and require a plurality of human efforts. In addition, after transporting, assembling and erection, and dismantling after erection, the work time becomes longer and the work efficiency is reduced.

  The second problem is that the conventional cable drum support device 90 does not have a brake function. Therefore, the idle rotation of the cable drum 80 cannot be prevented, and an extra optical cable may be unwound. As a result, the unwound optical cable comes into contact with the ground or is wound around an object on the ground, the cable surface is scratched, or the core wire inside the cable is cut.

  In addition, as described above, Patent Documents 1 and 2 disclose cable drum support devices having a brake function. In either case, rotation control instructions are issued by an operator to control rotation. For this reason, if the operator carelessly forgets to issue a rotation control instruction, the cable drum cannot stop spinning.

  In view of the above, the inventors of the present application have invented a cable drum support device that can efficiently perform the erection work and can automatically prevent the cable drum from spinning freely. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In this embodiment, a drop cable is taken as an example of the optical cable 10, and the configuration of the optical cable 10, the configuration of the cable drum 20, the configuration of the cable drum support device 30, and the cable drum support device 30 are used with reference to FIGS. The installation method was shown.

  First, the structure of the optical cable 10 and the cable drum 20 is shown using FIG.1 and FIG.2. FIG. 1 is a cross-sectional view of the optical cable 10. FIG. 2 is a perspective view of the cable drum 20.

  As shown in FIG. 1, the optical cable 10 includes a cable main body portion 1, a support wire portion 2, and a neck portion 3, and the cable main body portion 1 and the support wire portion 2 are aligned with each other in the longitudinal direction and the neck portion 3 is interposed therebetween. Are connected. The cable body 1 is composed of one or a plurality of optical fibers 4, 4,..., Tension members 5 and 5, and a common coating 6. The tension members 5 and 5 are respectively arranged above and below a predetermined distance from the optical fiber 4 to maintain the tension in the optical cable main body 1. The common coating 6 is provided on the outer periphery of the optical fibers 4, 4,. The support wire portion 2 is composed of a support wire 7 and a coating 8, and the coating 8 is applied to the outer periphery of the support wire 7.

  As shown in FIG. 2, the cable drum 20 includes a winding portion (cylinder) 21 and flanges 22 and 22 having shaft holes 22a, both of which are made of resin. The winding part 21 is a part formed in a cylindrical shape and around which the optical cable 10 is wound. Each flange 22 is formed in a disk shape having a diameter larger than the outer diameter of the winding portion 21, and the shaft hole 22 a and the hollow portion of the cylinder of the winding portion 21 are communicated with each other at the end of the winding portion 21. It is connected.

  Next, the configuration of the cable drum support device 30 will be described with reference to FIGS. 3, 4, and 6. FIG. 3 is a view of the apparatus main body 31 as viewed from above. FIG. 4 is a view of the apparatus main body 31 as viewed from the side. FIG. 6 is an enlarged view of the vicinity of the distance changing means B. In the following description, the “front surface of the apparatus main body 31” means the surface of the apparatus main body 31 arranged on the worker side during work, and the “rear surface of the apparatus main body 31” means the worker during work. Means the surface of the apparatus main body 31 arranged away from the device.

  As shown in FIGS. 3 and 4, the cable drum support device 30 includes a resin device main body 31 and a shaft 39. The shaft portion 39 (shown in FIG. 5) is a metal pipe and is formed so as to be able to be inserted through the hollow portion of the winding portion 21 and the shaft holes 22a of the flanges 22.

  As shown in FIGS. 3 and 4, the apparatus main body 31 is a substantially rectangular parallelepiped box having no upper surface. And a part of cable drum 20 is accommodated in the box inside (accommodating part) 31a.

  On both side surfaces of the apparatus main body 31, external connectors 32, 32 are attached to the outside of the apparatus main body 31, and internal connectors 33, 33 are attached to the inside of the apparatus main body 31. Each external connector 32 and each internal connector 33 are each a long plate-like member that extends in the longitudinal direction of each side surface, and is attached so that the upper surface is flush with the upper portion of each side surface. It has been. A shaft fixing tool 37 is attached to the upper surface of each external connector 32. A resin semi-disc-shaped flange abutting portion 35 is attached to each internal connector 33 so as to face the inside of the apparatus main body 31. Each flange contact portion 35 is configured not only to contact each flange 22 but also to rotate each flange 22 in the extraction direction when the optical cable 10 is extracted.

  Cutout portions 31b and 31b are formed on the front surface and the back surface of the apparatus main body 31 from the top to the bottom. Thereby, the front surface and the back surface of the apparatus main body 31 are each formed by cutting out part of the upper portion. In addition, external connectors 41 and 51 are attached to the outside of the apparatus main body 31 on the front and rear surfaces of the apparatus main body 31, respectively. Each of the external connectors 41 and 51 is a long plate-like member, and is attached so that it extends in the longitudinal direction of the front surface and the back surface, and the upper surface is flush with the upper portion of the cutout portion 31b. Yes.

  Above the external connector 41, an outer tube (another rod-like member) 43 and an inner tube 44 are disposed so as to extend substantially parallel to the longitudinal direction of the external connector 41. The outer tube 43 is a tube made of vinyl chloride. The inner tube 44 is an iron tube, is smaller in diameter and longer than the outer tube 43, and is arranged inside the outer tube 43 with the longitudinal direction thereof aligned. Therefore, both ends of the inner tube 44 are exposed from the outer tube 43, and screws 45, 45 are stuck into the exposed portions of the inner tube toward the upper surface of the external connector 41, respectively. The head of each screw 45 projects upward from the outer surface of the inner tube 44.

  As shown in FIG. 6, springs (second elastic bodies) 46, 46, nuts (second distance changing means) 47, 47, and shock absorbers 48, 48 are attached to the screws 45, 45, respectively. Yes. Each spring 46 is disposed outside each screw 45 below the inner tube 44 so as to be extendable in the longitudinal direction of each screw 45. Each nut 47 is screwed into a screw groove of each screw 45 above the inner tube 44, and is screwed into a screw groove of each screw 45 between the head of each screw 45 and the side surface of the inner tube 44. It is movable. Further, each nut 47 has a fixing means, whereby the movement of each nut 47 in the longitudinal direction of each screw 45 can be prevented. Each shock absorber 48 includes an upper shock absorber and a lower shock absorber, and is formed so that the side surface of the inner tube 44 can be clamped.

  Above the external connector 51, an outer tube (bar-shaped member) 53 and an inner tube 54 are disposed so as to extend substantially parallel to the longitudinal direction of the external connector 51. The outer pipe 53 is a pipe made of vinyl chloride, and is arranged so that the flanges 22 and 22 can come into contact with each other. The urging force that urges the outer tube 53 to the apparatus main body 31 is larger than the urging force that urges the outer tube 43 to the apparatus main body 31. The inner tube 54 is an iron tube, is smaller in diameter and longer than the outer tube 53, and is arranged inside the outer tube 53 with the longitudinal direction thereof aligned with each other. Therefore, both ends of the inner tube 54 are exposed from the outer tube 53, and screws 55, 55 are stuck into the exposed portions of the inner tube toward the upper surface of the external connector 51, respectively.

  As with the screws 45 and 45, the screws 55 and 55 have springs (second elastic bodies) 56 and 56, nuts (second distance changing means) 57 and 57, and a shock absorber 58, respectively, as shown in FIG. , 58 are attached. Each spring 56 is disposed outside each screw 55 below the inner tube 54 so as to be stretchable in the longitudinal direction of each screw 55. Each shock absorber 58 is formed so as to be able to sandwich the side surface of the inner tube 54. Each nut 57 is screwed into the screw groove of each screw 55 above the inner tube 54, and is screwed into the screw groove of each screw 55 between the head of each screw 55 and the side surface of the inner tube 54. It is movable. In addition, each nut 57 has a fixing means, whereby the movement of each nut 57 in the longitudinal direction of each screw 55 can be prevented. Each shock absorber 58 is formed so as to be able to sandwich the side surface of the inner tube 54.

  As described above, the outer pipe 53 is arranged so that the flange 22 of the cable drum 20 can be contacted without being fixed to the external connector 51. For this reason, when the cable drum 20 rotates, the outer tube 53 rotates in the direction opposite to the rotation direction of the cable drum 20 to control the rotation of the cable drum. That is, in the present embodiment, the rotation control means A that controls the rotation of the cable drum 20 is the outer tube 53.

  The outer tube 43 is disposed below the outer tube 53 because the heads of the screws 45 project upward from the inner tube 44. Specifically, as will be described later, the outer tube 43 is lightly brought into contact with the flanges 22 and 22 by rotating the screw 45 downward to move the outer tube 43 downward. Therefore, the outer tube 43 is in contact with the flange 22 of the cable drum 20 more weakly than the outer tube 53. Therefore, when the cable drum 20 is rotated, the outer tube 43 is only slightly rotated in the direction opposite to the rotation direction, and the rotation of the cable drum 20 is not controlled as much as the outer tube 53. That is, the outer tube 43 assists in controlling the rotation of the cable drum 20.

  Next, a method for laying the optical cable 10 will be described with reference to FIG. FIG. 5 is a side view of the drum support device 130 to which the cable drum 20 is attached.

  First, the cable drum support device 30 shown in FIG. 4 is assembled.

  In order to assemble the cable drum support device 30, first, a device main body 31, outer connectors 41 and 51, vinyl chloride outer tubes 43 and 53, and iron inner tubes 44 and 54 are prepared.

  Next, the outer connectors 41 and 51 are attached to the outside of the apparatus main body 31 so that the upper surface is flush with the notches 31b and 31b. Further, the inner tubes 44 and 54 are inserted into the outer tubes 43 and 53, respectively, with their longitudinal directions aligned.

  Subsequently, two screws 45 and 55, two nuts 47 and 57, and two shock absorbers 48 and 58 are prepared. Then, the nuts 47 and 57 are screwed into the screw grooves of the screws 45 and 55, and the upper shock absorbers 48 and 58 are attached to the screw tip side of the nuts 47 and 57. Further, the springs 46 and 56 are placed on the respective ends of the upper surfaces of the outer coupling tools 41 and 51, and the lower cushioning tools 48 and 58 are placed on the upper ends of the springs 46 and 56, respectively. .

  Subsequently, the outer pipes 43 and 53 into which the inner pipes 44 and 54 are respectively inserted are arranged above the outer coupling parts 41 and 51, respectively, and upper nuts 47 and 57 and upper shock absorbers 48 and 58. Are attached from above the inner tubes 44 and 54 exposed from the outer tubes 43 and 53 toward the upper surfaces of the outer connectors 41 and 51. Thereby, the cable drum support device 30 shown in FIG. 4 can be assembled.

  Next, as shown in FIG. 5, the cable drum 20 is supported by the cable drum support device 30. Specifically, a part of the cable drum is accommodated in the interior 31a of the apparatus main body 31, and the flanges 22 are brought into contact with the upper portions of the cutout portions 31b and 31b, so that the hollow portion of the winding portion 21 and the cable drum 20 are placed. The shaft portion 39 is inserted through the shaft hole 22a. Then, one flange 22 is brought into contact with one flange contact portion 35, and both ends of the shaft portion 39 are fixed to shaft fixing portions 37 and 37, respectively. Then, due to the weight of the cable drum 20, the springs 46 and 56 contract, and the outer tubes 43 and 53 come into contact with a part of the flanges 22 and 22. Then, the upper shock absorber of the shock absorber 58 is placed on the inner tube 54, and the nut 57 is placed on the inner tube 54. Similarly, the upper shock absorber of the shock absorber 48 is placed on the inner tube 44, and the nut 47 is placed on the inner tube 44. Then, the nut 47 is moved slightly downward while being screwed onto the screw 45, and the outer tube 43 is brought into light contact with a part of the flanges 22 and 22. Then, the nut 47 is fixed at that position. As a result, the outer tube 53 is urged against the flange 22 while the outer tube 43 is lightly brought into contact with the flange 22.

  Subsequently, the cable drum support device 130 to which the cable drum 20 is attached is transported to the work site.

  Subsequently, the optical cable 10 is unwound from the cable drum 20 and installed at a predetermined location. At this time, as shown in FIG. 5, since the outer tube 53 is in contact with the flange 22 of the cable drum 20, the outer tube 53 rotates in the direction opposite to the rotation direction as the cable drum 20 rotates. Thereby, the rotation of the cable drum 20 is controlled, and the installation work can be performed without causing the cable drum 20 to idle. Further, since the outer tube 43 is in light contact with the flange 22 of the cable drum 20, the outer tube 43 slightly rotates in the direction opposite to the rotation direction as the cable drum 20 rotates. Thereby, the rotation of the cable drum 20 is slightly controlled.

  When performing installation work using cable drums having different flange outer diameters, the cable drum 20 is detached from the cable drum support device 30 and the nut is released. Then, each spring 46, 56 extends according to a restoring force. Thereafter, cable drums having different outer diameters of the flanges are fixed. Then, each spring 46 and 56 contracts again. At this time, each of the springs 46 and 56 further shrinks when a cable drum having a larger flange outer diameter is fixed, and so much when a cable drum having a smaller flange outer diameter is fixed. Does not shrink. Thereby, the cable drum support apparatus 30 can support the cable drum which has the outer diameter of a different flange.

  As described above, the cable drum support device 30 in this embodiment includes the rotation control means A. The rotation control means A is configured such that the rotation of the cable drum 20 is controlled by the rotation of the cable drum 20 so that the outer tube 53 rotates in the direction opposite to the rotation direction. Therefore, the idle rotation of the cable drum 20 can be prevented. As a result, the erection work can be performed without unwinding an extra cable. Therefore, the extra cable that has been unwound does not come into contact with the ground or wrap around an object on the ground. Therefore, the cable surface is not scratched or the core wire is not cut inside the cable before the installation, and the optical cable 10 is not wasted.

  Further, the cable drum support device 30 is configured so that the urging force that urges the outer tube 43 to the apparatus main body 31 is larger than the urging force that urges the outer tube 53 to the apparatus main body 31. Yes. In other words, as shown in FIG. 5, the outer tube 43 is in light contact with the flanges 22 and 22 compared to the outer tube 43. As a result, the outer tube 43 is configured to slightly rotate in the direction opposite to the rotation direction by the rotation of the cable drum 20 to control the rotation of the cable drum 20. Therefore, the idle rotation of the cable drum 20 can be prevented a little. Furthermore, depending on the relationship between the speed at which the optical cable 10 is pulled and the length of the optical cable 10 wound around the cable drum 30, the rotation control by the rotation control means A may not be performed. Even in that case, the outer tube 43 can prevent the optical cable 10 from protruding from the flanges 22 and 22.

  Further, the cable drum support device 30 includes outer tubes 43 and 53. Therefore, as in the present embodiment, the cable drum 20 is supported by the cable drum support device 30 such that the outer tube 43 assists the rotation of the cable drum 20 and the outer tube 53 controls the rotation of the cable drum 20. Conversely, the cable drum 20 is connected to the cable drum support device 30 so that the outer tube 43 controls the rotation of the cable drum 20 and the outer tube 53 controls the rotation of the cable drum 20 in an auxiliary manner. Can be supported. Therefore, the cable drum support device 30 can support the cable drum 20 without considering the rotation direction of the cable drum 20 and the unwinding direction of the optical cable 10.

  Further, the outer tubes 43 and 53 are installed below the cable drum support device 30. Therefore, the cable drum 20 can be easily installed on the cable drum support device 30.

  In addition, since the outer tubes 43 and 53 are fixed to the apparatus main body 31 with screws 45 and 55, the optical cable 10 can be prevented from protruding from the cable drum 20 when the drum rotates.

  Further, the cable drum support device 30 includes distance changing means B. Therefore, even if the outer diameter of the flange 22 changes, the cable drum support device 30 is configured so that the cable drum can be attached to the cable drum support device 30 to perform the installation work. Therefore, there is no need to change the cable drum support device in accordance with the size of the cable drum, which is economical.

  Further, unlike the conventional cable drum support device 90, the cable drum support device 30 does not require assembly of the device, so that the installation time can be shortened. Further, since the cable drum support device 30 can be carried by one person, the work can be performed by a small number of people. Therefore, the cable drum support device 30 can improve work efficiency.

  In the present embodiment, the distance changing means is configured such that the outer tubes 43 and 53 can move along the longitudinal direction of the screws 45 and 55 as the springs 46 and 56 expand and contract, respectively. However, the outer tubes 43 and 53 may be configured to be movable in the vertical direction, the horizontal direction, and the radial direction of the flange.

  Further, the outer tubes 43 and 53 are both provided below the cable drum support device 30, but may be provided other than below the cable drum support device 30 as long as they can contact the flange 22. good. However, in consideration of convenience when the cable drum 20 is installed in the cable drum support device 30, it is preferable that the outer tubes 43 and 53 are both provided below the cable drum support device 30.

  The urging force that urges the outer tube 43 to the apparatus main body 31 is larger than the urging force that urges the outer tube 53 to the apparatus main body 31. You may be comprised so that it may become larger than a stretching force.

  Although the apparatus main body 31 is a substantially rectangular parallelepiped box, it may be a prismatic box. The shape of the apparatus main body 31 is not particularly limited as long as a part of the cable drum 20 is accommodated. In addition, the apparatus main body 31 may include a lid. In that case, the lid is preferably configured to cover the upper surface of the cable drum 20 after supporting the cable drum 20.

  Instead of each external connector 32 and each internal connector 33, the upper part of each side surface of the device main body 31 may be formed to extend outside and inside the device main body 31. Similarly, instead of the external connector 41, the front upper part of the device main body 31 may be formed to extend outside the device main body 31, and each of the device main bodies instead of the external connector 51 may be formed. The upper part of the back surface of the part 31 may be formed to extend to the outside of the apparatus main body part 31.

  The shaft portion 39 is a metal pipe, but may be a resin pipe. The material of the shaft part 39 is not particularly limited. Similarly, the material of the outer tubes 43 and 53 is vinyl chloride, but is not limited to vinyl chloride. Further, although the inner pipes 44 and 54 are each made of iron, they are not limited to iron. Further, each of the inner tubes 44 and 54 may be a rod instead of a tube.

  Further, in the cable drum 20, the winding portion 21 and the flanges 22 and 22 are all made of resin, but may be made of styrene foam or cardboard, and is limited to the material. There is nothing.

  As described above, the present invention is useful for the cable drum support device.

It is a figure which shows the cross section of a cable. It is a front view of a cable drum. It is the figure which looked at the cable drum support apparatus from upper direction. It is the top view which looked at the cable drum support apparatus from the side. It is the figure which looked at the cable drum support apparatus to which the cable drum was attached from the side. It is an enlarged view near distance changing means. It is the figure which looked at the conventional cable drum support apparatus from the front.

Explanation of symbols

10 Optical cable 20 Cable drum 21 Winding part (cylinder)
22 Flange 22a Shaft hole 30 Cable drum support device 31 Device main body 31a Housing portion 39 Shaft portion 43, 53 Outer tube (bar-shaped member)
44, 54 Inner tube (another bar)
46, 56 Spring (first and second elastic bodies)
47, 57 Nut A Rotation control means B Distance changing means

Claims (4)

A cable drum support device for supporting a cable drum in which a flange having a diameter larger than that of the cylinder is formed at both ends of the cylinder and a cable is wound around the cylinder,
An apparatus main body having an accommodating portion in which at least a part of the cable drum is accommodated;
A shaft portion that is inserted into a shaft hole formed in the flange so as to be able to communicate with the inside of the cylinder, and is fixed to the apparatus main body portion;
A cable drum support device, comprising: a rotation control unit which is attached to the device main body and is pressed against a peripheral edge of the flange to control the rotation of the cable drum by rotating together with the flange. . The cable drum support device according to claim 1,
The rotation control means is a rod-shaped member that extends substantially parallel to the shaft portion and is arranged so as to be in contact with the flange, and is configured to be rotatable in the direction opposite to the rotation direction with the rotation of the cable drum. A cable drum support device. The cable drum support device according to claim 2,
On the opposite side of the rod-shaped member and the shaft portion, another rod-shaped member extending substantially parallel to the shaft portion is provided,
The rod-shaped member and the another rod-shaped member are urged to the device main body by first and second elastic bodies, respectively.
The cable drum support device according to claim 1, wherein an urging force that urges the bar-like member to the apparatus main body is smaller than an urging force that urges the other bar-like member to the apparatus main body. The cable drum support device according to claim 1,
First distance changing means for changing a distance between the rod-shaped member and the shaft portion;
A cable drum support device further comprising second distance changing means for changing a distance between the another rod-shaped member and the shaft portion.

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