Cable drum rotation control device and method for using the same

Abstract

To more appropriately rotate a cable drum without the necessity of replacing any component even when the size of the cable drum is different.SOLUTION: A cable drum rotation control device comprises: a drum fixing rotary transmission jig 17 which comprises a sprocket 13 which is detachably fixed in accordance with a flange D of the left side surface of a cable drum CD and into which a drum axis 9 is penetrated at the center thereof; left and right jacks which support and fix left and right both ends of the drum axis 9; and left and right connection frames which connect space between a jack head part 6 of each jack and left and right extension frames in a bogie 2 respectively, hold a distance between the rotational center of the sprocket 13 and the rotational center of the sprocket 24 of a drum drive motor 22 on the left extension frame 2L2, and slide the extension frame in a direction of drawing into a base part frame or in a direction of pulling out it in accordance with ascending / descending of the jack.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE Embodiments of the present invention relate to a cable drum rotation control device and method of use. [Background technology]

[0002] For example, cable extension in electrical work at a construction site is carried out by pulling the cable out from a cable drum.

[0003] Pulling out the cable from the cable drum requires manual labor, but (1) if the cable is thick, or (2) if the cable is long, the weight of the cable itself becomes heavy depending on the respective conditions, and the cable drum also becomes large and heavy.

[0004] The larger and heavier the cable drum, the greater the force of inertia when the cable drum rotates, and the greater this force of inertia, the more force is required to start and stop pulling out the cable, requiring a larger number of workers.

[0005] Conventionally, in order to reduce the number of workers required for extending a cable, a cable drum rotating device provided with a rotary drive means for electrically rotating the cable drum has been considered. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 11-343073 [Patent Document 2] Japanese Utility Model Application Publication No. 07-043164 Summary of the Invention [Problem to be solved by the invention]

[0007] The problem that the present invention aims to solve is to provide a cable drum rotation control device and a method for using the same that enable more appropriate rotation of a cable drum without the need to replace any of the components, even when the cable drum is of a different size. [Means for solving the problem]

[0008] The cable drum rotation control device of the embodiment includes: a drum fixing rotation transmission jig that is detachably fixed to one flange of a cable drum in accordance with the diameter of the flange and includes a first sprocket through which a drum shaft of the cable drum is inserted at its center; Left and right jacks each supporting and fixing the left and right ends of the drum shaft, and each having a head that can be raised or lowered to any height; a carriage having left and right base frames on which the left and right jacks are respectively erected and which are longitudinally arranged in parallel with the left and right flanges of the cable drum, and having left and right extension frames which can be extended and contracted by sliding in the longitudinal direction from one end of each of the left and right base frames; a drum drive motor mounted on one of the extension frames of the carriage and having a second sprocket with a roller chain wound between the second sprocket and the first sprocket; and left and right connecting frames that connect the heads of the left and right jacks to the left and right extension frames, respectively, and slide the left and right extension frames in a direction to retract them into one end of the left and right base frames in response to the lifting of the left and right jacks, while maintaining the distance between the center of rotation of the first sprocket and the center of rotation of the second sprocket, and slide the left and right extension frames in a direction to pull them out from the one end of the left and right base frames in response to the lowering of the left and right jacks. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a side view showing the external configuration of the cable drum rotation control device 1 according to the embodiment when the cable drum CD is large. [Diagram 2]FIG. 2 is a side view showing the external configuration of the cable drum rotation control device 1 according to the embodiment when the cable drum CD is small. [Diagram 3] 1 is a front view showing an external configuration of a cable drum rotation control device 1 according to an embodiment. [Figure 4] FIG. 2 is a front view of a cable drum CD for explaining the relationship between the cable drum CD of the cable drum rotation control device 1 according to the embodiment and a drum fixed rotation transmitting jig 17 integrally attached to one flange (brim) D of the cable drum CD. [Diagram 5] 1A and 1B are diagrams showing the configuration of a flange-fixed spoke 14 in a drum-fixed rotation transmitting jig 17 of a cable drum rotation control device 1, in which FIG. [Figure 6] 1A and 1B are simplified cross-sectional views illustrating the extension and retraction movement of the flange-fixed spokes 14, where FIG. 1A illustrates the sliding movement of the spoke extension 16 relative to the spoke base 15, and FIG. 1B illustrates the fixing movement of the spoke extension 16 relative to the spoke base 15. [Figure 7] 1A and 1B are diagrams illustrating the configuration and operation of the C-type clamp 16C provided at the other end of the spoke extension portion 16, where FIG. 1A illustrates a state in which the C-type clamp 16C is not fixed to the flange D of the cable drum CD, and FIG. 1B illustrates a state in which the C-type clamp 16C is fixed to the flange D of the cable drum CD. [Figure 8] FIG. 2 is a front view showing the external configuration of the remote control RE of the cable drum rotation control device 1, where (A) shows the state when the main power supply of the device 1 is turned OFF, and (B) shows the state when the main power supply of the device 1 is turned ON. [Figure 9] 4 is a diagram for explaining the relationship between the operation of the brake button BB of the remote control RE and the operation of the non-excitation actuated brake 28. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] (Configuration and operation of embodiment) FIG. 1 is a side view showing the external configuration of a cable drum rotation control device 1 according to an embodiment when a cable drum CD is large.

[0012] FIG. 2 is a side view showing the external configuration of the cable drum rotation control device 1 according to the embodiment when the cable drum CD is small.

[0013] In the embodiment, in the cable drum rotation control device 1 shown in Figures 1 and 2, the front side of the figure will be described as the left side of the device 1, the back side of the figure will be described as the right side of the device 1, the right side of the figure will be described as the front (front side) of the device 1, and the left side of the figure will be described as the back (rear side) of the device 1.

[0014] FIG. 3 is a front view showing the external configuration of the cable drum rotation control device 1 according to the embodiment.

[0015] FIG. 4 is a front view of a cable drum CD for explaining the relationship between the cable drum CD of the cable drum rotation control device 1 according to the embodiment and a drum fixed rotation transmitting jig 17 integrally attached to one flange (bump) D of the cable drum CD.

[0016] The cable drum rotation control device 1 includes a carriage 2 movable on the ground (floor surface) G.

[0017] The trolley 2 is arranged parallel to the left and right sides of the device 1 and has a left base frame 2L1 and a right base frame 2R1 (see Figure 2) which have a hollow portion with, for example, a rectangular cross-section that is longitudinal in the front-to-rear direction, and also has a left extension frame 2L2 and a right extension frame 2R2 which are slidably inserted into the hollow portions of the left base frame 2L1 and the right base frame 2R1, respectively, and which extend and contract forward.

[0018] For example, wheels (casters) 3 movable in all directions are provided on the undersides of the rear ends of the left base frame 2L1 and the right base frame 2R1 and on the undersides of the front ends of the left extension frame 2L2 and the right extension frame 2R2.

[0019] The left extension frame 2L2 extending forward from the front end of the left base frame 2L1 is fixed, for example, by pressing the tip of a left frame fixing bolt 4L, which penetrates and is screwed into the left side surface of the front end of the left base frame 2L1, against the left side surface of the left extension frame 2L2. Similarly, the right extension frame 2R2 extending forward from the front end of the right base frame 2R1 is fixed, for example, by pressing the tip of a right frame fixing bolt (not shown), which penetrates and is screwed into the right side surface of the front end of the right base frame 2R1, against the right side surface of the right extension frame 2R2.

[0020] The left and right widths of the left base frame 2L1 and the left extension frame 2L2 of the trolley 2 (Figure 2) are configured as a motor base that is wider than the left and right widths of the right base frame 2R1 and the right extension frame 2R2 in order to mount the drum drive motor 22 and its motor base 23, which will be described later, on the upper surface of the left extension frame 2L2.

[0021] A pair of left jack 5L and right jack 5R are provided upright at the same positions in the front-to-rear direction on the top surfaces of the left base frame 2L1 and the right base frame 2R1, respectively.

[0022] The left and right jacks 5L, 5R are configured using, for example, screw jacks. The jack heads 6 of the left and right jacks 5L, 5R are adjusted to any desired height by manually rotating the rotary operating parts 7a at the bottom to the right or left to extend and retract the screw parts 7b upward.

[0023] A left shaft fixing portion 8L and a right shaft fixing portion 8R are integrally formed on the upper part of the jack head 6 of each of the left and right jacks 5L, 5R for fixing both ends of the drum shaft 9 inserted into the shaft hole DH (Figure 3) of the cable drum CD.

[0024] Both the left and right shaft fixing portions 8L, 8R have annular portions through which the tip of the drum shaft 9 is inserted in the left-right direction of the device 1, and the drum shaft 9 is fixed, for example, by pressing the tip of a drum shaft fixing bolt 10L, 10R, which penetrates the front surfaces of the left and right shaft fixing portions 8L, 8R and screws into them, against the side of the drum shaft 9 inserted into the shaft fixing portions 8L, 8R.

[0025] In addition, on the right side surface of the left shaft fixing portion 8L, i.e., at a position adjacent to the cable drum CD side along the drum shaft 9 (Figure 3), an armature brake 11 (brake member) having, for example, an annular portion through which the drum shaft 9 is inserted in the same manner as the left shaft fixing portion 8L, is provided.

[0026] The armature brake 11 functions as an armature brake of a non-excitation actuated brake 28 (electric brake) that is built into or integral with the left shaft fixed portion 8L.

[0027] The armature brake 11 is supported by two movable shafts 12a, 12b that penetrate the left shaft fixed portion 8L and the annular portion of the non-excitation actuated brake 28 from left to right parallel to the drum shaft 9, and is supported so as to be slidable in both a direction protruding toward the cable drum CD along the drum shaft 9 and a direction being pulled toward the left shaft fixed portion 8L (non-excitation actuated brake 28).

[0028] When the power to the non-magnetic actuated brake 28 is turned OFF, the armature brake 11 protrudes toward the cable drum CD side due to the spring force of the spring built into the non-magnetic actuated brake 28, and when the power to the non-magnetic actuated brake 28 is turned ON, the armature brake 11 is attracted toward the left shaft fixed portion 8L (non-magnetic actuated brake 28) side due to the magnetic force generated by the magnetic circuit built into the non-magnetic actuated brake 28.

[0029] The cable drum rotation control device 1 also includes a drum fixing rotation transmission jig 17 for fixing the peripheral edge of one of the flanges (brim) D of the cable drum CD by clamping it from the outer periphery, thereby transmitting a rotational force centered on the shaft hole DH to the cable drum CD.

[0030] The drum-fixed rotation transmission jig 17 comprises, for example, a sprocket 13 (first sprocket) having an axial hole at its center that is the same diameter as the axial hole DH of the cable drum CD, a disk-shaped sprocket base 19 for positioning the sprocket 13 in alignment with the center of one side of the cable drum CD, and four flange-fixed spokes 14 extending radially (in four directions here) from the outer circumferential surface of the sprocket base 19, each of which is attached and fixed to the peripheral edge of the flange (brim) D of the cable drum CD.

[0031] FIG. 5 is a diagram showing the configuration of the flange-fixed spokes 14 in the drum-fixed rotation transmitting jig 17 of the cable drum rotation control device 1, FIG. 5(A) is a front view thereof, and FIG. 5(B) is a side view thereof.

[0032] The flange-fixed spokes 14 are fixed to the outer peripheral surface of the sprocket base 19 and comprise a spoke base 15 having a longitudinal slide hole 15H in the radial direction, and a spoke extension 16 having one end 16S inserted into the slide hole 15H of the spoke base 15, allowing the length of the flange-fixed spokes 14 to be extended or contracted, as shown by arrow c.

[0033] FIG. 6 is a simplified cross-sectional view illustrating the extension and retraction movement of the flange-fixed spokes 14, where (A) is a diagram illustrating the sliding movement of the spoke extension 16 relative to the spoke base 15, and (B) is a diagram illustrating the fixing movement of the spoke extension 16 relative to the spoke base 15.

[0034] The spoke extension 16 is provided with a latch 16F that is protruding from the side of one end that is inserted into the slide hole 15H of the spoke base 15, and a latch release button 18 that is provided on the side of the other end of the spoke extension 16 and is pressed when the latch 16F is buried via the interlocking wire 16W.

[0035] The spoke extension 16 becomes slidable in the direction extending the spoke base 15, as shown by arrow c, by pressing the latch release button 18, as shown by arrow a1 in Figure 6(A), and sinking the latch 16F into the side of the spoke extension 16, as shown by arrow b1.

[0036] In addition, when the latch release button 18 of the spoke extension 16 is released as shown by arrow a2 in Figure 6 (B), the latch 16F is caused to protrude from the side of the spoke extension 16 as shown by arrow b2, and the latch 16F is engaged with one of multiple latch grooves 15D formed continuously along the longitudinal direction of the inner wall of the slide hole 15H of the spoke base 15, so that the sliding position of the spoke extension 16 relative to the spoke base 15 is fixed as shown by arrow d.

[0037] In other words, the spoke extension 16 fixes the length by which the spoke base 15 is extended by the spoke extension 16 (i.e., the length of the flange-fixed spoke 14) in an expandable and contractible manner by engaging its latch 16F with one of multiple latch grooves 15D in the spoke base 15.

[0038] Figure 7 is a diagram explaining the configuration and operation of the C-type clamp 16C provided at the other end of the spoke extension portion 16, where (A) is a diagram explaining the state in which the C-type clamp 16C is not fixed to the flange D of the cable drum CD, and (B) is a diagram explaining the state in which the C-type clamp 16C is fixed to the flange D of the cable drum CD.

[0039] A C-clamp 16C is provided at the other end of the spoke extension 16 for hooking and fixing the spoke extension 16 onto the periphery of a flange (brim) D of a cable drum CD. A flange fixing bolt 20 is provided at the tip of the C-clamp 16C facing the inner surface of the periphery of the flange D, and is screwed into the inner surface of the periphery of the flange D, as indicated by arrow e. A rubber pressing part 21 that has high friction with the wooden flange D, for example, is provided at the tip of the flange fixing bolt 20.

[0040] That is, as shown in Figures 1 to 4, the drum-fixed rotation transmitting jig 17 of the cable drum rotation control device 1 is attached integrally to one side of the cable drum CD by adjusting the lengths of the flange-fixed spokes 14 provided in four radial directions from the outer periphery of the sprocket base 19 by expanding and contracting them with the respective spoke extensions 16 as shown in Figures 5 and 6 with the centers of the sprocket 13 and sprocket base 19 aligned with the center of the shaft hole DH on one side of the cable drum CD, and then, as shown in Figure 7, by hanging the C-clamps 16C of each spoke extension 16 on the peripheral portion of the flange D of the cable drum CD and fixing them with the flange fixing bolts 20. The drum-fixed rotation transmitting jig 17 is configured to be rotatable integrally with the cable drum CD around the shaft hole DH of the cable drum CD or the shaft holes of the sprocket 13 and sprocket base 19.

[0041] In addition, the drum shaft 9 is inserted into the shaft hole DH of the cable drum CD to which the drum fixed rotation transmission jig 17 is attached, and both ends of the drum shaft 9 are fixed through the shaft fixing portions 8L, 8R provided on the jack heads 6 of the left and right jacks 5L, 5R of the cable drum rotation control device 1. With the cable drum CD attached to the cable drum rotation control device 1, when the power to the non-excitation actuated brake 28 is turned off and the armature brake 11 is caused to protrude along the drum shaft 9, the armature brake 11 is pressed against the side of the sprocket 13 of the drum fixed rotation transmission jig 17, and the rotation of the cable drum CD is braked by friction with the armature brake 11.

[0042] When the power supply to the non-excitation actuated brake 28 is turned on, the armature brake 11 is attracted to the non-excitation actuated brake 28 along the drum shaft 9 and separated from the sprocket 13 of the drum fixed rotation transmission jig 17, thereby releasing the braking of the cable drum CD.

[0043] 1 to 3, a drum drive motor 22 that generates a rotational force for the cable drum CD is mounted on the upper surface of the left extension frame 2L2 of the dolly 2 via a motor base 23. A roller chain 25 is hung between a sprocket 24 (second sprocket) coupled to the rotating shaft of the drum drive motor 22 and a sprocket 13 of the drum fixed rotation transmitting jig 17 to transmit the rotational motion of the drum drive motor 22 to the cable drum CD. Note that, on the periphery of each of the sprockets 24, 13 on which the roller chain 25 is hung, there are provided detachment prevention flanges 24f, 13f that prevent the roller chain 25 from coming off even if the roller chain 25 is allowed to have some slack.

[0044] In addition, a left connecting frame 26L and a right connecting frame 26R are suspended between the jack heads 6 of the left and right jacks 5L, 5R and the respective tips of the left extension frame 2L2 and right extension frame 2R2 of the cart 2 to connect them to each other.

[0045] The rear end of the left connecting frame 26L is rotatably supported relative to the jack head 6 of the left jack 5L via a left jack support shaft 27L1 that penetrates from left to right from the left side of the left connecting frame 26L to the jack head 6 of the left jack 5L, and the tip end of the left connecting frame 26L is rotatably supported relative to the tip end of the left extension frame 2L2 via a left extension frame support shaft 27L2 that penetrates from left to right from the left side of the left connecting frame 26L to the tip end of the left extension frame 2L2.

[0046] Similarly, the rear end of the right connecting frame 26R is rotatably supported relative to the jack head 6 of the right jack 5R via a right jack support shaft 27R1 that penetrates left and right from the right side of the right connecting frame 26R to the jack head 6 of the right jack 5R, and the tip end of the right connecting frame 26R is rotatably supported relative to the tip end of the right extension frame 2R2 via a right extension frame support shaft 27R2 that penetrates left and right from the right side of the right connecting frame 26R to the tip end of the right extension frame 2R2.

[0047] When the extension frames 2L2, 2R2 are released from the left and right base frames 2L1, 2R1 (fixed by fixing bolt 4L in Figure 1), and the jack heads 6 of the left and right jacks 5L, 5R (Figure 3) are raised as shown by arrow A1 in Figure 1, the rear ends of the left and right connecting frames 26L, 26R also rise together with the jack heads 6, and the left extension frame 2L2 and right extension frame 2R2, whose tip ends are supported via the connecting frames 26L, 26R, slide and are drawn into the hollow portions of their respective left and right base frames 2L1 and 2R1, as shown by arrow B1 in Figure 1.

[0048] As the left and right jack heads 6 are raised by the left and right jacks 5L, 5R, when the left and right extension frames 2L2, 2R2 are pulled into the base frames 2L1, 2R1, the inclination angle of the left and right connecting frames 26L, 26R changes (increases), and just as this, the inclination angle of the straight line connecting the center of the sprocket 13 of the drum fixed rotation transmission jig 17, which is the center of the drum shaft 9, and the center of the sprocket 24 of the drum drive motor 22 also changes (increases).As a result, the cable drum CD is raised while the distance between the center of rotation of the sprocket 13 and the center of rotation of the sprocket 24 is kept constant.

[0049] Conversely, when the jack heads 6 of the left and right jacks 5L, 5R (Figure 3) are lowered using the left and right jacks 5L, 5R (Figure 3), the rear ends of the left and right connecting frames 26L, 26R also lower together with the jack heads 6, and the left extension frame 2L2 and right extension frame 2R2, whose tip ends are supported via the connecting frames 26L, 26R, are slid out of the hollow portions of their respective left base frames 2L1 and right base frames 2R1, as shown by arrow B2 in Figure 2.

[0050] When the left and right extension frames 2L2, 2R2 are pulled out from the base frames 2L1, 2R1 as the left and right jack heads 6 are lowered by the left and right jacks 5L, 5R, the inclination angle of the left and right connecting frames 26L, 26R changes (becomes smaller), and just as this, the inclination angle of the straight line connecting the center of the sprocket 13 of the drum fixed rotation transmission jig 17, which is the center of the drum shaft 9, and the center of the sprocket 24 of the drum drive motor 22 also changes (becomes smaller).Therefore, the cable drum CD is lowered while the distance between the center of rotation of the sprocket 13 and the center of rotation of the sprocket 24 is kept constant.

[0051] In other words, the cable drum rotation control device 1 of the embodiment can attach the drum fixing rotation transmission jig 17 to any of different sizes of cable drums CD (large and small) without requiring the replacement of any parts, and the rotation transmission system, including the roller chain 25, etc., can also be fitted easily and in a state as stable as possible by fixing the drum shaft 9 to the shaft fixing portions 8L, 8R provided on each jack head 6 while adjusting the height of the left and right jacks 5L, 5R so that the center of gravity is as low as possible in accordance with the size of the cable drum CD (the diameter of the flange D).

[0052] (Power supply system configuration and operation) 1 to 3, a motor power cord 29 that supplies operating power to the drum drive motor 22 is connected to an inverter output terminal of a control distributor 34 via an inverter 30 and an inverter power cord 31, both of which are mounted on the left base frame 2L1. In addition, a brake power cord 32 that supplies operating power to the non-excitation actuated brake 28 is connected to a brake output terminal of the control distributor 34. A device power cord 33 that supplies commercial power to the cable drum rotation control device 1 is connected to a power input terminal of the control distributor 34.

[0053] The cable drum rotation control device 1 is equipped with a remote control RE. The remote control RE controls ON / OFF of the main power supply of the cable drum rotation control device 1, adjustment of the rotation of the drum drive motor 22, and ON (operation power OFF) / OFF (operation power ON) of the non-excitation actuated brake 28 according to the operation of a user (an operator in this case). A remote control cord 35 of the remote control RE is connected to a control distributor 34 via a remote control connector 36.

[0054] The control distributor 34, for example, supplies commercial power supplied to the power input terminal via the device power cord 33 to the remote control RE, and outputs the operating power of the non-excitation actuated brake 28 input via a remote control connector 36 in response to operation of the remote control RE from the brake output terminal to the brake power cord 32, and outputs the operating power of the drum drive motor 22 input via the remote control connector 36 in response to operation of the same remote control RE from the inverter output terminal to the inverter power cord 31.

[0055] The inverter 30 increases or decreases the power frequency of the operating power for the drum drive motor 22, which is input from an inverter power cord 31, in response to the operation of a remote control RE, thereby changing the rotation speed of the drum drive motor 22.

[0056] FIG. 8 is a front view showing the external configuration of the remote control RE of the cable drum rotation control device 1, where (A) shows the state when the main power supply of the device 1 is turned OFF, and (B) shows the state when the main power supply of the device 1 is turned ON.

[0057] FIG. 9 is a diagram for explaining the relationship between the operation of the brake button BB on the remote control RE and the operation of the non-excitation actuated brake 28. As shown in FIG.

[0058] The remote control RE is equipped with a power button BP for switching the main power of the cable drum rotation control device 1 ON / OFF, an operation lamp LD that lights up when the main power of the device 1 is ON, a brake button BB for switching the non-excitation actuated brake 28 ON (operating power OFF) / OFF (operating power ON), and a rotation adjustment knob TC for adjusting the rotation speed of the drum drive motor 22.

[0059] The remote control cord 35 shown in Figures 1 and 2 accommodates an equipment power cord 33, an inverter power cord 31, and a brake power cord 32, which distribute the power input from the commercial power source, the power output to the inverter 30, and the power output to the non-excitation actuated brake 28 via a control distributor 34.

[0060] As shown in Figure 8 (A), when the power button BP on the remote control RE is released, the main power supply of the cable drum rotation control device 1 is OFF, and no operating power is output to either the inverter power cord 31 (drum drive motor 22) or the brake power cord 32 (non-excitation actuated brake 28).

[0061] As shown by arrow f in Figure 9(B), when the operating power is OFF (energized (non-excitation)), the armature brake 11 protrudes along the drum shaft 9 and presses against the side of the sprocket 13 of the drum fixed rotation transmission jig 17, braking the rotation of the cable drum CD. Therefore, when the main power of the cable drum rotation control device 1 is OFF, the rotation of the cable drum CD is constantly braked and stopped.

[0062] As shown by the arrow PP in Figure 8 (B), when the power button BP on the remote control RE is pressed, the main power supply of the cable drum rotation control device 1 is turned ON, but in the initial state, the non-excitation actuated brake 28 is maintained ON (operating power OFF) and the drum drive motor 22 is maintained OFF (operating power OFF).

[0063] After the main power is turned ON (initial state) by the power button BP, each time the brake button BB is pressed, it switches between OFF of the non-excitation actuated brake 28 (operating power ON) and ON of the drum drive motor 22 (operating power ON) and ON of the non-excitation actuated brake 28 (operating power OFF) and OFF of the drum drive motor 22 (operating power OFF).

[0064] That is, after turning the main power on (initial state) with the power button BP, pressing the brake button BB turns the non-excitation actuated brake 28 off (operating power on), the armature brake 11 is attracted to the non-excitation actuated brake 28, the braking of the cable drum CD is released, and the drum drive motor 22 turns on (operating power on), and the cable drum CD starts to rotate. At this time, by operating the rotation adjustment knob TC, the power supply frequency of the drum drive motor 22 is increased or decreased by the inverter 30, and the rotation speed of the cable drum CD is changed.

[0065] This allows an operator to easily pull out and extend the cable CL from the cable drum CD without using a large amount of force, regardless of the size of the cable drum CD (the diameter of the flange D), as shown in Figures 1 and 2.

[0066] After that, when the brake button BB is pressed again as shown by the arrow PB in Fig. 9(A), the non-excitation actuated brake 28 turns ON (operating power OFF), and as shown by the arrow f, the armature brake 11 presses against the side of the sprocket 13 to brake the rotation of the cable drum CD, and the drum drive motor 22 turns OFF (operating power OFF), and the rotation drive of the cable drum CD is stopped. At this time, the inertial force associated with the previous rotation acts on the cable drum CD, but the rotational force of the cable drum CD due to the inertial force is braked by the friction caused by the armature brake 11 pressing against the side of the sprocket 13, so that the cable drum rotation control device 1 on which the cable drum CD is placed does not become unstable due to the shock associated with the sudden stop, and the rotation of the cable drum CD and the withdrawal of the cable CL can be safely stopped.

[0067] (Summary of the embodiment) The cable drum rotation control device 1 of the embodiment includes a drum fixing rotation transmission jig 17 that is detachably fixed to a side surface (left side surface in this case) of one flange D of the cable drum CD in accordance with the diameter of the flange D and includes a sprocket 13 through which a drum shaft 9 of the cable drum CD is inserted at the center, and left and right jacks 5L, 5R that support and fix both left and right ends of the drum shaft 9, respectively, and have jack heads 6 (shaft fixing parts 8L, 8R) that can be raised or lowered to any height. The left and right jacks 5L, 5R are respectively erected, and the device includes a dolly 2 that has a left base frame 2L1 and a right base frame 2R1 that are arranged longitudinally in parallel with the left and right flanges D of the cable drum CD, and a left extension frame 2L2 and a right extension frame 2R2 that can slide forward from the front ends of the left and right base frames 2L1, 2R1, respectively, and can be extended and retracted. The drum drive motor 22 is mounted on the left extension frame 2L2 and has a sprocket 24 with a roller chain 25 hung between the sprocket 13 of the drum fixed rotation transmission jig 17. The left and right connection frames 26L and 26R connect the jack heads 6 of the left and right jacks 5L and 5R to the left and right extension frames 2L2 and 2R2, respectively, and slide the left and right extension frames 2L2 and 2R2 in a direction to draw them into the left and right base frames 2L1 and 2R1 in response to the rise of the left and right jacks 5L and 5R, while maintaining the distance between the center of rotation of the sprocket 13 of the drum fixed rotation transmission jig 17 and the center of rotation of the sprocket 24 of the drum drive motor 22, and slide the left and right extension frames 2L2 and 2R2 in a direction to draw them out from the left and right base frames 2L1 and 2R1 in response to the descent of the left and right jacks 5L and 5R.

[0068] As a result, the drum fixing rotation transmission jig 17 can be attached to any of different sizes of cable drums CD (large and small) without the need to replace any of its parts, and the rotation transmission system, including the roller chain 25, etc., can also be attached easily and stably by fixing the drum shaft 9 to each jack head 6 while adjusting the height of the left and right jacks 5L, 5R so that the center of gravity is as low as possible in accordance with the size of the cable drum CD (the diameter of the flange D).

[0069] Therefore, according to the cable drum rotation control device 1 of the embodiment, even if the cable drum has a different size, it is possible to rotate the cable drum more appropriately without having to replace any of the components.

[0070] In addition, the cable drum rotation control device 1 of the embodiment is provided with a non-excitation actuated brake 28 that is provided between the jack head 6 (shaft fixing portion 8L) of the left jack 5L to which the drum shaft 9 is fixed and the sprocket 13 of the drum fixed rotation transmission jig 17, and that presses the armature brake 11 against the side of the sprocket 13 to brake the rotation of the sprocket 13 when no current is applied, and moves the armature brake 11 away from the side of the sprocket 13 to release the brake when current is applied.

[0071] As a result, a safe state can be maintained with the rotation of the cable drum CD braked when the main power supply to the cable drum rotation control device 1 is not supplied (including power outages). Even if an inertial force is generated in the rotation of the cable drum CD, the cable drum rotation control device 1 carrying the cable drum CD does not become unstable due to the shock caused by a sudden stop, and the rotation of the cable drum CD can be stopped safely.

[0072] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0073] 1...Cable drum rotation control device, 2...Cart, 2L1...Left base frame, 2L2...Left extension frame, 2R1...Right base frame, 2R2...Right extension frame, 3...Wheels (casters), 5L...Left jack, 5R...Right jack, 6...Jack head, 7a...Rotation operation part, 7b...Screw part, 8L...Left shaft fixing part, 8R...Right shaft fixing part, 9...Drum shaft, 10L, 10R...Drum shaft fixing bolt, 11...Armature brake (brake member), 12a, 12b...Movable shaft, 13...Sprocket (first sprocket), 14...Flange fixing spoke, 15...Spoke base, 15D...Latch groove, 16...Spoke extension part, 16F...Latch, 16C...C-type clamp, 17...Drum fixing rotation transmission jig, 1 8...latch release button, 19...sprocket base, 20...flange fixing bolt, 21...pressure portion, 22...drum drive motor, 23...motor base, 24...sprocket (second sprocket), 25...roller chain, 26L...left connecting frame, 26R...right connecting frame, 27L1...left jack support shaft, 27L2...left extension frame support shaft, 27R1...right jack support shaft, 27R2...right extension frame support shaft, 28...non-excitation operated brake (electric brake), 30...inverter, 34...control distributor, CD...cable drum, D...flange (brim), DH...shaft hole, CL...cable, G...ground (floor surface), RE...remote control, BP...power button, BB...brake button, TC...rotation adjustment knob.

Claims

1. a drum fixing rotation transmission jig including a first sprocket that is detachably fixed to one flange of a cable drum in accordance with a diameter of the flange and through which a drum shaft of the cable drum is inserted at its center; Left and right jacks each supporting and fixing the left and right ends of the drum shaft, and each having a head that can be raised or lowered to any height; a carriage having left and right base frames on which the left and right jacks are respectively erected and which are longitudinally arranged in parallel with the left and right flanges of the cable drum, and having left and right extension frames which can be extended and contracted by sliding in the longitudinal direction from one end of each of the left and right base frames; a drum drive motor mounted on one of the extension frames of the carriage and having a second sprocket with a roller chain wound between the second sprocket and the first sprocket; left and right connecting frames that connect the heads of the left and right jacks to the left and right extension frames, respectively, and slide the left and right extension frames in a direction to draw them into one end of the left and right base frames in response to the lifting of the left and right jacks while maintaining a distance between the center of rotation of the first sprocket and the center of rotation of the second sprocket, and slide the left and right extension frames in a direction to draw them out from the one end of the left and right base frames in response to the lowering of the left and right jacks; A cable drum rotation control device comprising:

2. The drum fixed rotation transmission jig is a disk-shaped sprocket base through which the drum shaft is inserted and which positions the first sprocket in alignment with the center of one flange of the cable drum; a plurality of flange fixing spokes provided radially from an outer circumferential surface of the sprocket base so as to be extendable and retractable, each of the extendable ends being removably attached and fixed to a periphery of one of the flanges of the cable drum; The cable drum rotation control device according to claim 1 , further comprising:

3. an electric brake provided between the head of one of the jacks to which the drum shaft is fixed and the first sprocket, the electric brake pressing a brake member against the side surface of the first sprocket when no current is applied to brake the rotation of the first sprocket, and separating the brake member from the side surface of the first sprocket when current is applied to release the brake; The cable drum rotation control device according to claim 1 or 2.

4. a remote control that switches on / off a power supply to the drum drive motor in accordance with the power supply to the electric brake; The cable drum rotation control device according to claim 3 .

5. The electric brake is a non-excitation actuated brake, and the brake member is an armature brake. The cable drum rotation control device according to claim 3 .

6. a drum fixing rotation transmission jig including a first sprocket that is detachably fixed to one flange of a cable drum in accordance with a diameter of the flange and through which a drum shaft of the cable drum is inserted at its center; Left and right jacks each supporting and fixing the left and right ends of the drum shaft, and each having a head that can be raised or lowered to any height; a carriage having left and right base frames on which the left and right jacks are respectively erected and which are longitudinally arranged in parallel with the left and right flanges of the cable drum, and having left and right extension frames which can be extended and contracted by sliding in the longitudinal direction from one end of each of the left and right base frames; a drum drive motor mounted on one of the extension frames of the carriage and having a second sprocket with a roller chain wound between the second sprocket and the first sprocket; A method for using a cable drum rotation control device comprising left and right connecting frames that connect the heads of the left and right jacks to the left and right extension frames, respectively, While maintaining a distance between the center of rotation of the first sprocket and the center of rotation of the second sprocket via the left and right connecting frames, the left and right extension frames are slid in a direction in which they are drawn into one end of the left and right base frames in response to the lifting of the left and right jacks, and the left and right extension frames are slid in a direction in which they are drawn out from one end of the left and right base frames in response to the lowering of the left and right jacks. How to use a cable drum rotation control device.

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