JPH04117881U - Drum mount for cable overhead lines - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to provide a cable overhead line drum mount with a device that mechanically rotates the existing wire winding drum in the winding direction, thereby reducing the number of workers and fatigue. It is an object of the present invention to provide a drum mount for a cable overhead line. [Configuration] The drum mount for cable overhead lines according to the present invention is
a drum mount 33 rotatably supporting both ends of the drum shaft 1 inserted into and removably into the shaft hole 14 of the cable drum; a shaft fixing means for integrally connecting the drum shaft 1 and the cable drum 72; In the drum mount for a cable overhead line, which has a braking means 42 provided on the drum mount 33 for applying a variable braking force to the drum shaft 1, the flange of the cable drum 72a is frictionally driven by the drum mount 33. A friction wheel 113 is provided so as to be rotatable, and a power transmission device 109 is provided on the shaft of this friction wheel 113 via a clutch 110.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a drum mount for cable overhead lines used in cable overhead line work, and is specially developed for This relates to a drum mount for cable overhead lines used in the cable threading method. Ru.

0002

[Conventional technology]

During communication cable overhead line work, contact the communication cable with obstacles on the ground. Various methods have been devised to carry out continuous and stable wire extension without any problems.

0003 In the general overhead line construction method, a rotatable cable drum is installed on a drum mount, and A metal wheel is installed on the cleat pillar to guide and pass the wire and cable. By pulling the extended wire connected to the cable wire with low tension, Cable passing method in which the cable is passed between the cleat column spans, and A large number of hanging metal wheels are connected by long connecting ropes, and the connecting ropes are folded once. Then, attach the end of the cable to these hanging wheels. The end of the cable is integrally connected to the first suspension wheel, and the first suspension The cable is supported by each metal wheel by pulling the metal car with a wire. There is a hanging metal car (moving metal car) construction method in which the wire is extended. But these Even if this construction method is adopted, the weight of the cable drum continues to decrease as the cable extension progresses. Conversely, the total weight of the cables strung between the concrete column spans is When the weight exceeds the weight, the cable drum will pay out depending on the weight difference. There is a problem in that the cable rotates in the opposite direction without permission, and the cable comes into contact with objects on the ground. So Here, the applicant first inserts the cable into the drum shaft hole and then drives the cable drum. The outer peripheral surface of the drum shaft and the drum shaft are attached to the drum shaft to be rotatably supported on the ram mount. A wedge is inserted between the hole to integrate the cable drum and drum shaft. The pillow brake is used to brake the drum shaft to prevent the cable drum from rotating freely. , and its braking force can be adjusted to enable back-tension wire drawing with low tension. proposed a "drum mount for cable overhead lines" (patent application No. 139676, Showa 2). .

0004

[Problem that the idea aims to solve]

By the way, during cable overhead line work, new cables are attached to newly erected concrete columns. In addition to constructing cables (new lines), existing cables (existing lines) are removed and new cables are installed. There was work to replace the installed cables, so conventionally the above-mentioned drum mount for cable overhead lines was used. In addition, you can install a separate drum stand for winding the cable, or A drum for cable winding is installed on the drum stand for the cable winding. The existing line was recovered by manually turning it in the winding direction.

[0005] However, in order to recover existing lines, in addition to a drum mount for cable overhead lines, a special cable Installing a drum stand for winding the rolls is important in terms of transportation and because of the available land. It is not suitable for construction because it is restricted, and it is basically used for recovering existing lines. There was a problem in that it required a lot of labor.

[0006] The purpose of this invention is to wind the existing wire winding drum on the cable overhead drum frame. We installed a device that mechanically rotates in the scraping direction to reduce the number of workers and reduce fatigue. To provide a drum mount for cable overhead lines.

[0007]

[Means to solve the problem]

In order to achieve the above object, the drum mount for cable overhead lines according to the present invention is A drive that rotatably supports both ends of the drum shaft, which is removably inserted into the shaft hole of the bull drum. Shaft fixing for integrally connecting the ram mount, the above drum shaft and cable drum and a means provided on the drum mount for applying a variable braking force to the drum shaft. In the drum mount for a cable overhead line, the drum mount has a braking means for A friction wheel is provided rotatably to frictionally drive the collar of the cable drum, and A power transmission device that drives the shaft in the winding direction is connected to the shaft of this friction wheel via a clutch. It was established as follows.

[0008]

[Effect]

Insert the drum shaft into the shaft hole of the cable drum using the shaft fixing means and rotate it to the drum mount. After the rotatable installation, the drum shaft and cable are connected by means of shaft fixation, for example a wedge. integrally fixed with the drum. As a result, the cable drum is integrated with the drum shaft. It rotates. When extending the cable, adjust the braking force of the braking means against the drum shaft. When the rotation of the drum shaft is properly controlled by A back tension corresponding to the braking force acts on the wheel. For this reason, the cable The dip is well adjusted and the cable drum is prevented from rotating freely.

[0009] If it is necessary to remove the existing line before extending the cable, remove the cable for the extension. Prepare an empty cable drum for removal that is separate from the drum, and use a shaft fixing means to secure it. The cable drum and drum shaft are integrated, and then the end of the existing line is attached to a cage for removal. After fixing to the cable drum, the power transmission device is driven and the braking force of the braking means is released. Release and connect the clutch. As a result, the cable drum for removal has a method of winding. The existing line is sequentially wound around the cable drum.

0010

【Example】

Preferred embodiments of this invention will be described below with reference to the accompanying drawings.

[0011] The drum mount for cable extension according to the present invention can be roughly divided into drum shaft, drum mount, It consists of a pillow brake means, a tension detector, a controller, and a drum drive means.

0012 Drum shaft... Cable drums have standardized drum width, body diameter, and shaft hole depending on the type of cable. It is formed by Therefore, the drum shaft usually matches the shaft hole diameter of the cable drum. The cable drum is pivotally supported on the drum mount by inserting the , In this way, preparing a drum shaft dedicated to a specific cable drum, drum mount Configuring the device into a structure that allows the use of various drum shafts reduces the equipment configuration, cost, and cost. undesirable from a management perspective.

[0013] Therefore, in this invention, as shown in Figure 2, the cable of the minimum standard commonly used is used. A pipe (mechanical (e.g., carbon steel pipes for machine structures), and the axial length of the pipe body is set to the minimum standard cable drum length. The drum shaft body 2 is formed by making the drum shaft body 2 suitably shorter than the drum width, and both sides of the drum shaft body 2 are The drum shaft 1 is constructed by attaching shaft members 3 and 4 coaxially and integrally to each end. has been completed.

[0014] One shaft member 3 has a shaft coaxially fitted to the drum shaft main body 2 at one end thereof. 5 and a flange for defining the fitting position of the shaft portion 5. The other end is further reduced in diameter in two steps from the flange 6 to form a flange. A drum fitting shaft portion 7 and a rotating shaft portion 8 are sequentially formed on the other end side of the drum 6.

[0015] The other shaft member 4 is formed from the same processed material (round bar) as the one shaft member 3, It has a shaft portion 9 coaxially fitted into the drum shaft main body 2 on one end side thereof, and , is formed with a flange 10 for defining the fitting position of the shaft 9, and A shaft portion 11 having a rectangular cross section is formed on the other end side from the flange portion 10 of The diameter of the side is reduced in two steps, and the other end side of the shaft portion 11 corresponds to the drum fitting shaft portion 7. A screw shaft portion 12 and a rotating shaft portion 13 are sequentially formed.

[0016] By welding between the flanges 6, 10 and the end surface of the drum shaft body 2, , these shaft members 3 and 4 are integrated into the drum shaft main body 2 and constitute an integral drum shaft 1. to be accomplished.

[0017] The drum shaft 1 configured in this way has shafts with different hole sizes depending on the standard. In order to fix the drum shaft 1 in the hole 14, a wedge means serving as a shaft fixing means is attached. There is.

[0018] That is, the drum fitting shaft portion 7 of one shaft member 3 has a diameter extending toward the shaft hole 14 side. A first wedge member 15 formed into a cone shape by successively reducing the diameter is fixed. . This first wedge member 15 has a fitting member that fits into the drum fitting shaft portion 7 at its axis. A pin is formed with a hole 16 and passes through the first wedge member 15 in the radial direction after being fitted therein. It is fixed to the drum fitting shaft portion 7 by a member 17.

[0019] The other shaft member 4 has a cylindrical ring that is screwed onto the threaded shaft portion 12 and is movable in the axial direction. A retainer 18 is provided, which is fitted into the shaft portion 11 so as to be movable with respect to the shaft portion 11. A sleeve 20 is provided which is formed with a mating square hole 19. sleeve A square hole 21 is provided on the side closer to the shaft hole 14 than the shaft 20 and is movably fitted into the shaft portion 11. A second wedge member 22 having a cone shape is provided, and the sleeve 20 and the second wedge member 22, the outer circumferential surfaces of these opposing ends extend in the radial direction. Flange portions 23 and 24 are formed, respectively. These flanges 23 and 24 each have As shown in FIG. 3, spring housing portions 25 are formed at intervals in the circumferential direction. The sleeve 20 and the second wedge member are placed in these spring housing portions 25. A compression coil spring 26 is stretched between the spring 22 and the spring 22 to apply elastic force in both directions. It is provided.

[0020] Furthermore, the end of the sleeve 20 on the rotating shaft 13 side is cut off diagonally at a certain inclination angle. between the inclined surface 27 and the right-angled end surface 28 of the cylindrical retainer 18. moves the cylindrical retainer 18 to the shaft hole 14 side against the compression coil spring 26. A wedge 29 is attached for movement. The wedge 29 is It is formed with an elongated hole 30 that fits with the screw shaft portion 12 along the screw shaft portion 1. 2 so as to be movable in the radial direction. 31 is the sleeve 20 and the second wedge It is fitted onto the outer circumferential surface of the member 22 and spans the second wedge member 22. This is a cylindrical connecting member for movably guiding the tube 20 toward the flange 10. The end of the connecting member 31 on the rotating shaft portion 13 side is engaged with the flange portion 23 to attach the sleeve 2. A protrusion 32 is provided extending radially inward to prevent the zero from coming off.

[0021] Next, a process for attaching the drum shaft 1 constructed as described above will be explained.

[0022] First, the cylindrical retainer 18, the wedge 29, the sleeve 20, and the second wedge member 22 are Remove and insert the drum shaft 1 from one shaft hole 14 side to the other shaft hole 14 side. 1st At the position where the wedge member abuts one of the shaft holes 14, a second wedge member and a second wedge member are attached to the drum shaft 1. Attach the wedge sleeve 20, wedge 29, and cylindrical retainer 18, and attach the cylindrical retainer 1. 8 to the other shaft hole 14 side, and the second wedge member 22 comes into contact with the other shaft hole 14. After this, the wedge 29 is driven against the inclined surface 27 in the direction in which the wedge force is generated. Chime in. In other words, the wedge force of the wedge 29 causes the compression coil spring 26 to move in the compression direction. The spring force of the compression coil spring 26 accumulated as a result of the deflection is applied directly to the shaft. The drum shaft 1 and the cable drum are integrated by acting on the hole 14, and the first wedge Due to the alignment action of the member 15 and the second wedge member 22, the drum shaft 1 can be rotated without eccentric rotation. It becomes possible to roll.

[0023] Note that the wedge angles of the first and second wedge members 15 and 22 are determined according to the applied cable cord. It is determined according to the cable drum shaft hole dimensions of the maximum and minimum specifications of the ram, and The wedge angle of the wedge 29 is also based on the wedge angle of the first and second wedge members 15 and 22. It is determined uniquely.

[0024] Drum stand... As shown in FIG. 4, the drum mount 33 is The two side frames 34, 34 installed at a distance from each other are placed at their front and rear ends. It is connected by two cross frames 35, 35 to form a rectangular frame shape, and A drum jack 36 is provided upright on each side frame 34, 34. The drum shack 36 has a cylindrical shape with a feed screw (not shown) on the inner peripheral surface. The jack cylinder 37 and the feed screw of the jack cylinder 37 are screwed together. A jack rod 38 is formed so as to be freely retractable relative to the jack cylinder 37. It is composed of. This jack cylinder 37 has a base plate 39 at its base. , and a stay member 40 facing diagonally downward is integrally formed on the side thereof. has been completed. The base plate 39 is welded and fixed to the upper surface of the side frame 34. It will be done. At the tip of one of the jack rods 38 is shown in FIGS. 2 and 5. A shaft bearing 41 is attached to the other end of the jack rod 38. A pillow brake means 42 having the structure shown in FIGS. 4, 6 and 7 is used as the motion means. It is attached.

[0025] The bearing portion 41 is a rectangular base as shown in FIGS. 2 and 5. The base 43 is integrally attached to the tip of one jack rod 38 by welding, and the A bearing frame 44 is attached to the outer side of the base 43, and the rear end of the base 43 is It is formed by attaching a rectangular holding frame 45 to the end face of the bearing frame. Two radial bearings 46 are provided on the upper part of the arm 44 at appropriate intervals in the horizontal direction. installed. A screw hole 47 is formed downward on the top surface of the base 43. A knob bolt 48 is screwed into the screw hole 47. And the above presser frame The arm 45 is formed with a hole into which the threaded portion of the knob bolt 48 is loosely fitted. A step-like shaft holding portion 49 is formed in a portion facing the bearing 46. There is.

[0026] Therefore, in order to rotationally support the drum shaft 1, the knob bolt 48 is loosened and pressed. Rotate the frame 45 to release the space between the radial bearings 46, and After rotationally supporting the rotating shaft portion 8 on the bearing 46, the holding frame 45 is placed on the rotating shaft portion 8. By rotating to the position and tightening the knob bolt 48, the rotation shaft portion 8 is prevented from coming off. will be stopped.

[0027] Pillow brake means... As shown in Figures 4, 6 and 7, the tip of the other jack rod has a A base member 50 formed in a rectangular shape is welded and attached to the drum shaft 1. A lever support plate 51 is welded to each end face of the base member 50 in the axial direction. installed. These lever support plates 51 have support shafts spaced apart in the vertical direction. 52 are provided over each other. The fulcrum portion of the brake lever 53 is attached to these shafts 52. It is supported and provided. These brake levers 53 are located on the intermediate side in the longitudinal direction. It is formed with a braking groove 54 for sandwiching the rotating shaft portion 13 . placed on the bottom The power point of one of the brake levers 53 is cut into a U-shape as shown in FIG. A pivot portion 55 is formed in this portion, and this pivot portion 55 has a lifting height along the circumferential direction. A cam 56 formed by changing the cam 56 is interposed. This cam 56 is hung on the pivot portion 55. It is integrally attached to a rotating shaft 57 provided by a fixed pin 58, and the rotating shaft 57 is It is configured to change the lifting height as the moving shaft 57 rotates. Brake lever above 53, 53 are in a state in which the rotating shaft portion 13 is engaged as shown in FIGS. 2 and 6. It is configured to be housed within a rectangular frame 59 in the state. This rectangular frame 59 , a short elongated hole 58a is formed along the vertical direction in the center of the side plate. The rotation shaft 57 is attached to the elongated hole 58a so as to be hung therebetween. That is, the above The rotation shaft 57 is rotatable relative to the elongated hole 58a and allows the rectangular frame 59 to easily fall over. It is provided so as to be movable along the long hole 58a. Further, the rectangular frame 59 is It is shaped to have dimensions that allow rotation with considerable margin for the two brake levers 53 mentioned above. has been completed. One (upper) brake lever 5 is mounted on the upper plate 60 constituting the rectangular frame 59. A knob bolt 61 for rotating the brake lever 3 toward the other (lower) brake lever 53 is screwed together. It is provided. In other words, this knob bolt 61 is attached to one (upper) brake lever 53. The rectangular frame 59 rotates ( At the same time, the distance between the braking groove 54 and the rotating shaft portion 13 is reduced. decide. Further, the lower plate 62 constituting the rectangular frame 59 has a cam surface of the cam 56. A support shaft member 64 with a cone-shaped receiving portion 63 attached to the tip is attached in contact with the It is being This support shaft member 64 is attached to pass through the lower plate 64, and A pin member (spring pin, etc.) is inserted through the end opposite to the receiving part 63 in the radial direction. )65 is installed. A receiving portion 63 is provided between the receiving portion 63 and the lower plate 62. A spring 26a is provided that applies a resilient force to bring the cam into contact with the cam surface. There is.

[0028] Furthermore, the base member 50 is provided coaxially with the brake groove 54 as shown in FIG. A bearing frame is provided in which the two radial bearings 46 are rotatably supported in a position. 66 is attached to one end of the rotation shaft 57 as shown in FIG. The lifting height of the cam 56 is changed by rotating the rotating shaft 57 of the cam 56, and as a result, one side The brake lever 53 is driven in the direction of increasing or decreasing the braking force relative to the other brake lever 53. A control lever 67 is integrally attached. This control lever 67 is equipped with oil. A double-acting actuator means 68 is attached. Actuator means 6 The tip of the piston rod 69 of No. 8 is connected to the power point of the control lever 67, The base end of the cylinder 70 is pivoted to a bracket fitting 71 attached to the base member 50. It is supported and installed.

[0029] Therefore, by expanding and contracting the actuator means 68 in the braking direction, one of the The brake groove 54 formed on the brake lever 67 and the brake groove formed on the other brake lever 67 As the distance between the groove 54 and the groove 54 is increased or decreased, the braking torque acting on the rotating shaft portion 11 is increased or decreased. As a result, the tension of the overhead wire on the cable drum 72 integrated with the drum shaft 1 can be increased or decreased. Ru.

[0030] Tension detector... As shown in FIG. 4, on the front cross member 35 of the drum mount 33, has a pole 73 erected at its center position, and a case is placed at the upper end of the pole 73. A tension detector 75 is attached to detect the actual tension of the bull 74. Pole A base plate 76 is welded and attached to the upper end of 73, and this base plate 76 On one side, there is a base frame 7 formed along the pulling direction of the cable 74. 7 is installed vertically. This base frame 77 is horizontal at both end positions. A frame portion 78 is integrally formed, and a vertical frame 79 is integrally formed at the center position. formed and composed. The axis of the pole 73 is centered on the base frame 77. The first rollers 80 are installed horizontally at axially symmetrical positions, which are the center, and the horizontal frame The arms 78, 78 have two vertically spaced second wires spaced apart from each other in the horizontal direction of the cable 74. A roller 81 is attached. And the base frame 77 has a second guide row. A third roller 82 is installed horizontally above and below a position close to the roller 81. At a position above the base frame 76 on the side of the first roller 80 from the roller 82, , a fourth roller 83 is installed horizontally. These first to fourth rollers 80, 8 1, 82, and 83 have their proximal ends relative to the base frame 77 and horizontal frame 78. It is rotatably supported via a bearing on a fixed shaft that is integrally fixed. The shaft is connected to the first to fourth rollers 80, 81, 82 to prevent each roller from falling off. , 83, the tip is caulked. and the vertical frame 7 9 has a detector extending in the same direction as the horizontal frame 78 at the upper and lower positions thereof. Support frames 84 and 85 are integrally formed. Upper detector support frame A knob bolt 86 is screwed into the knob bolt 84 so as to be movable in the vertical direction. 6 has a rotor configured to detect a compressive load via a bracket 87. A docel 88 is attached.

[0031] A rectangular block 89 is integrally attached to the load input portion of the load cell 88. It is attached. The lower detector support frame 85 lifts and lowers its block 89. The block 89 is guided by being engaged with the block 89 so as to prevent the block 89 from rotating. It is formed with a rectangular opening 90. The block 89 has the above-mentioned opening. When viewed from the pulling direction of the cable 74, there is a A roller frame 91 formed in a U-shape is integrally attached. A press roller 92 is rotatably attached to the roller frame 91. . The bracket 87 also has a proximal end integrally attached thereto, as shown in FIG. The mounted tip passes through a hole 90 formed in the upper detector support frame 86. A gauge 94 is also attached. The gauge 94 is formed into a rod shape and is spaced apart in the axial direction. A scale 95 is formed on the upper surface of the upper detector support frame 85. The movement position of the press roller 92 is determined by measuring the amount of movement of the bracket 87 relative to the It is designed to be adjusted.

[0032] Therefore, the cable formed by the second roller 81 and the third roller 82 arranged in front and behind The cable 74 is inserted through the cable passage part, and the cable 74 is rotatably supported by the first roller 80. and adjust the knob bolt 86 using the gauge 94 to The cable 74 between the rollers 80 is bent permissibly by the pressing roller 92. When the cable 74 is wired after being bent within the bending ratio range, the cable 74 is A load cell 88 detects the component force of the lever 74 in the return direction.

[0033] Controller... As shown in FIG. 10, the controller 96 includes a tension setting circuit 97 and a tension detection circuit. 98 and a braking torque control circuit 99. The tension setting circuit 97 is The overhead line tension F of the cable 74 depends on the type of cable 74 used for overhead line work.₁of The tension detection circuit 98 is electrically connected to the load cell 88. so as to input the load f detected by the load cell 88 into the braking torque control circuit 99. It is composed of The braking torque control circuit 99 is set by the tension setting circuit 97. value F₁Basically, the braking stroke of the actuator means 68 is determined based on and adjust the stroke of the piston rod 69. and piston rod 6 Immediately after braking in step 9, the actual tension F of the cable is determined from the holding angle θ of the holding roller 92 and the load f. ₂ is configured to be calculated based on equation (1). Also, the set tension F₁against Actual tension value F₂At the same time as calculating the difference △T, and determining whether △T is positive or negative, △T is “ 0'', the operating direction of the actuator means 68 and its stroke are determined. The actuator is configured to adjust the stroke of the actuator.

F ₂ =f/2sin θ (1) Hereinafter, the cable 74 overhead line system and overhead line construction method of the present invention will be described.

[0035] First, the winch side is attached to concrete columns (not shown) erected at predetermined intervals. and drum side, and a vehicle equipped with a vehicle winch (not shown) on the winch side. is installed, and the drum mount 33 according to the present invention is installed on the drum side. and each The concrete pillar has guide rollers for guiding the cable 74 to the overhead line position. (not shown). The vehicle winch has a type that takes the output directly from the axle. Winch, winch that extracts output directly from the vehicle's hydraulic power source, vehicle power generation power source There are winches that obtain driving power from the motor, but the winch can be selected arbitrarily. Next, wrap the winch wire around the guide roller, and connect the tip of the winch wire to the drum mount 33. The cable drum 72 is connected to the tip of the cable drum 72 installed in the cable drum 72 via a swivel or the like. this In this state, apply DC power to the controller 96, and connect the tension setting circuit 97 to the cable to be used. Setting tension F suitable for 74₁is input, drive the vehicle winch in the winding direction. The moving cable 74 is connected to the overhead line. At this time, the preset value F₁according to cable Cable drum 72 is in a back-tensioned state with tension applied to 74. The overhead line is started in this state. At this time, the actual tension of the cable 74 detected by the load cell 88 Force F₂On the other hand, the braking torque control circuit 99 performs the control shown in the flowchart of FIG. Execute. That is, in step 100, the set tension F₁Actual tension F₂reduce Calculate the set tension F₁and actual tension F₂determine whether they are equal or not. step 100 If it is determined that the results are equal, the span difference is In this case, the braking torque control circuit 9 9 is the actual tension F in step 101.₂is converted into braking torque T and the actuator means Continue good braking of 68. In step 100, the set tension F₁and actual tension F₂If it is determined that they are not equal, the braking torque control circuit 99 performs step 102. , newly set tension F₁Actual tension F₂Subtract the set tension F₁against Actual tension F₂It is determined whether or not is a value greater than "0". In other words, the set tension F₁against Actual tension F₂is larger than “0”, the actual tension F₂is the cable overhead line This is the side where cable quality deteriorates by exceeding the tension suitable for₂but The set tension F may be insufficient due to factors such as elongation of the winch wire, etc.₁Actual tension F ₂ is less than “0”, the cable in the span of the concrete column Since the dip becomes larger than necessary, the braking torque control circuit 99 First, in step 102, it is determined which case the current overhead line state is. Ste The actual tension F is determined by step 102.₂is the set tension F₁was determined to be excessive compared to In this case, the braking torque control circuit 99 controls the actual tension F in steps 103 and 104.₂and request The calculated difference △F is converted into braking torque, and the difference △T is converted into the actual braking torque T. is added or subtracted so that the actual tension of the cable 74 is equal to the initial tension. The braking torque T is successively changed and adjusted. In other words, this control stops the vehicle winch. It also works effectively in cases where the cable drum 72 is prevented from rotating freely and the cable 74 is The function is to prevent the driver from escaping. Set the vehicle winch to constant tension like this In this state, the overhead line cable 74 is not subjected to excessive tension and is not exposed to excessive dip. The cable can now be installed quickly and safely without compromising the quality of the cable 74. It becomes possible to carry out overhead lines that are highly complete and labor-saving.

[0036] Note that friction pads made of urethane or the like are laminated on the surfaces of the first and second wedge members 15 and 22. Of course, it is also possible to further increase the frictional force by inning, and the above-mentioned Paul 7 3 is configured to be movably attached to the cross member 35, Pole 73 for cross member 35 or base plate 76 for pole 73 The cable 74 is configured to be rotatably mounted so that the overhead line direction of the cable 74 can be freely adjusted. It is also possible to do so.

Further, the tension F ₁ of the cable 74 used is set according to the diameter and logarithm of the wire accommodated in the cable 74, but the actual tension F ₂ when the cable 74 is a CCP cable is is determined between 0 and 100 kgf. In FIG. 4, 105 is a control box for protecting the controller 96 from wind and rain, and in FIG. 7, 106 is a hydraulic motor that supplies pressure oil to the actuator means 68.

[0038] Drum drive means... Now, the drum mount for the cable overhead line configured as described above is removed from the existing cable. In order to configure the drum mount 33 so that it can also be used for Means 107 are attached.

[0039] As shown in FIG. 1, the drum driving means 107 includes a cable drum 7 for removing cables. A friction wheel for frictionally driving 2a and a drive device for applying driving force to the friction wheel. It consists of a clutch and a clutch for releasably connecting the drive device and the friction wheel. has been done.

[0040] Specifically, the bottom of the winding cable drum 72a is placed on the drum mount 33. A frame 111 for fixing the drive device to the side is integrally attached by welding. , the frame 111 has a built-in reduction gear as a drive device, such as a planetary gear and a sun A drive motor 109 composed of gears is integrally attached. and drive An input shaft 11 is connected to the output shaft of the motor 109 via an electromagnetic clutch 110 which is a clutch. 2 are installed coaxially, and a tire 113 serving as a friction wheel is integrally attached to the input shaft 112. installed on. The input shaft 112 may be mounted cantilevered as shown. If strength is required, a structure in which both ends are rotatably supported may be adopted. Ma In addition, the drive motor 109 and the electromagnetic clutch 110 are connected to a control box (not shown). The controller 96 is configured to be operated by a control switch of the When the switch is on, the actuator means 68 applies a braking force in response to the signal. It is designed to be free.

[0041] Therefore, the empty cable drum 7 for removal is separate from the cable drum 72 for cable extension. 2a is prepared, and the cable drum 72a and the drum shaft 1 are connected by a wedge means. After that, the tip of the existing line is fixed to the cable drum 72a for removal. Then, the control switch is turned on to operate the drive motor 109 and electromagnetic clutch 110. Then, the drum shaft 1 becomes free, and the tire 113 can run on the cable drive without slipping. 72a is rotated in the winding direction of the existing cable. As a result, the existing line The tape is sequentially wound around the cable drum 72a.

[0042] Note that a sprocket is integrally attached to the drum shaft 1 and a sprocket is attached to the motor 109. Of course, it is also possible to attach a sprocket and drive the drum shaft 1 with a chain in the winding direction. It is possible, but with this configuration, a motor with large output (shaft torque) will be used. She was forced to do so, and an unexpected accident occurred where her hand was grabbed by Chen. There is also a possibility that it may occur. On the other hand, as in the present invention, the flange end of the cable drum 72a is When configured to drive, a motor with low shaft torque can be used, The reliability, durability, and safety of the device are dramatically improved.

[0043]

[Effect of the idea] As is clear from the above explanation, this invention has the following excellent effects: Demonstrate.

[0044] (1) During cable overhead line work, back tension the new cable drum without idling. It is possible to extend cable lines and remove existing cables, which greatly contributes to labor savings. You can donate.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a drum mount for cable extension according to the present invention.

FIG. 2 is a cross-sectional view showing the drum shaft of the cable extending drum mount according to the present invention and its attachment.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a perspective view of a drum mount according to the present invention.

FIG. 5 is a side view showing the bearing part.

FIG. 6 is a side view of the pillow brake means.

[Figure 7] Enlarged view of main parts of pillow brake means

FIG. 8 is a sectional view showing a main part of the tension detection means.

FIG. 9 is a sectional view showing a main part of the tension detection means.

FIG. 10 is a conceptual diagram showing a drum mount system according to the present invention.

FIG. 11 is a flowchart showing the control contents of the controller.

[Explanation of symbols]

1 Drum shaft 14 Shaft hole 15 First wedge member (shaft fixing means) 22 Second wedge member (shaft fixing means) 33 Drum mount 42 Pillow brake means (braking means) 72a cable drum 110 Electromagnetic clutch (clutch) 109 Drive motor (power transmission device) 112 Drive motor input shaft 113 Tire (friction wheel)

Claims (1)

[Scope of utility model registration request] 1. A drum mount rotatably supporting both ends of a drum shaft that is inserted into and removably inserted into a shaft hole of a cable drum; shaft fixing means for integrally connecting the drum shaft and the cable drum; In the drum mount for a cable overhead line, the drum mount has a braking means for applying a variable braking force to the drum shaft, wherein the drum mount is rotatably configured to frictionally drive the collar of the cable drum. 1. A drum mount for a cable overhead wire, characterized in that a friction wheel is provided and a power transmission device is provided on the shaft of the friction wheel via a clutch.