JP2009153244A - Cable relaxation preventing suspended wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable relaxation preventing suspended wheel for automatically adjusting a relaxation without use of an electrical control when a cable is installed, and surely preventing the excess relaxation of the cable. <P>SOLUTION: The cable relaxation preventing suspended wheel comprises: a pulley 12 for supporting the communication cable 5, and moving the communication cable 5 in the axial direction; a swing arm 13 for contacting the delivery side of the communication cable 5 from the pulley 12, and sensing the relaxation of the communication cable 5 on the delivery side; a power transmission means 14 for mechanically transmitting a swing of the swing arm 13 due to the relaxation of the communication cable 5; and a brake means 15 for contacting the delivery side of the communication cable 5, and suppressing a movement of the communication cable 5 in the axial direction when it is driven by the power transmission means 14, and the quantity of the swing of the swing arm 13 due to the relaxation of the communication cable 5 exceeds a predetermined value. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cable suspension used when laying a communication cable or the like, and more particularly, to a cable slack prevention suspension capable of preventing excessive cable slack without using electric control.

  In laying work such as communication cables, when extending cables between multiple power poles, the cable drawn from the cable drum side is supported by a suspension car attached to each power pole, and the tip end side of the cable is wound up Is taken up by. FIG. 13 shows a state of cable extension in a conventional communication cable laying operation, and a suspension wheel 4 is attached to the upper part of each of the power poles 1a to 1d. The communication cable 5 drawn out from the cable drum 2 is wound up by the winding device 3 while being supported by each suspension vehicle 4. In this case, if the cable feed amount of the cable drum 2 and the cable winding amount in the winding device 3 are the same, the slack of the cable 5 does not occur between the utility poles 1a to 1d. However, when the cable feed amount of the cable drum 2 is larger than the winding amount of the winding device 3, as shown in FIG. 14, a large slack of the communication cable 5 occurs between the utility poles, and the communication cable 5 becomes a passing vehicle. There is a risk of interference with 6 or the like.

Then, the laying construction method which prevented the excessive slack of the cable at the time of laying a cable is conventionally known (for example, refer patent document 1). In this laying method, tension is applied in the direction opposite to the direction in which the cable is extended to prevent the cable from hanging down.
JP 2002-17011 A

  However, since the laying method of Patent Document 1 adjusts the tension of the cable using electrical control, the following problems exist. That is, in the case of tension adjustment by electric control, a delay in the cable tension adjustment operation tends to occur due to signal processing, and it is difficult to adjust the slack of the cable with good response. Further, in the case of tension adjustment by electric control, there is a problem that it cannot be used in a place without a power source. Since the installation of communication cables and the like is necessary not only in cities but also in mountainous areas where there is no power supply, it is required to automatically adjust the slack of cables without using electrical control.

  Accordingly, an object of the present invention is to provide a cable slack prevention suspension wheel that can automatically adjust the slack of the cable when laying the cable without using electric control, and can reliably prevent excessive slack of the cable. .

  In order to achieve the above object, the invention according to claim 1 is directed to a pulley for supporting a cable and moving the cable in an axial direction, and a delivery side of the cable in contact with a delivery side of the cable from the pulley. A swing arm that detects slack of the cable, power transmission means that mechanically transmits the swing of the swing arm due to slack of the cable, and the swing arm that is driven by the power transmission means and slack of the cable. A cable slack prevention suspension vehicle comprising braking means that contacts the cable delivery side when the swing amount exceeds a predetermined value and suppresses axial movement of the cable.

  According to this invention, the slack of the cable on the delivery side from the pulley is detected by the swing arm, and the swing of the swing arm due to the slack of the cable is mechanically transmitted to the braking means by the power transmission means. The cable is braked by the braking means.

  According to a second aspect of the present invention, in the cable slack preventing suspension vehicle according to the first aspect, the power transmission means is constituted by a link mechanism.

  According to a third aspect of the present invention, in the cable slack preventing suspension vehicle according to the first aspect, the power transmission means includes a flexible tube that can be bent, and a power transmission wire that is movably inserted into the flexible tube. It is characterized by being comprised from the cable rod which has.

  According to a fourth aspect of the present invention, in the cable slack preventing suspension vehicle according to the first aspect, the braking means is configured such that a braking force can be adjusted.

  According to the first aspect of the present invention, since the cable is braked by mechanically transmitting the swing amount of the swing arm, the cable braking response is improved as compared with the case where electric control is used. It is possible to reliably prevent excessive slack of the cable in the cable laying operation. Further, by preventing excessive slack of the cable, interference between the cable and a passing vehicle can be avoided, and the number of monitoring personnel in cable laying work can be reduced as compared with the conventional case. Furthermore, since electrical control is not required, it can be used even in mountainous areas where there is no power source.

  According to the second aspect of the present invention, since the power transmission means is constituted by a link mechanism, the configuration can be simplified as compared with the case where a power transmission mechanism such as a gear or a hydraulic device is used.

  According to the third aspect of the invention, since the power transmission means is constituted by a bendable cable rod, the degree of freedom in designing the power transmission mechanism is increased and the design is facilitated. In addition, since the wire moves along the flexible tube when the power is transmitted to the cable rod, it is not necessary to secure a space for swinging in the apparatus unlike the link mechanism, and the apparatus can be made compact.

  According to the invention described in claim 4, since the braking force of the braking means can be adjusted, the movement of the cable is appropriately adjusted by adjusting the braking force according to the type and thickness of the cable. Can be suppressed.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
1 to 9 show Embodiment 1 of the present invention. As shown in FIG. 9, in the cable laying operation, the cable slack prevention suspension wheel 10 is used in a state of being attached to the upper part of the utility poles 1a to 1d, for example. The communication cable 5 as a cable drawn from the cable drum 2 is wound by the winding device 3 while being supported by a cable slack prevention suspension wheel 10 attached to each of the power poles 1a to 1d.

  1 to 8 show details of the cable slack preventing suspension 10. As shown in FIGS. 1 to 8, the cable slack prevention suspension wheel 10 mainly includes a frame 11, a pulley 12, a swing arm 13, a link mechanism 14, and a braking means 15. Among these, the braking means 15 is shown about two types, and the braking means 15 shown in FIGS. 3-6 has shown the modification of FIG. 1 and FIG. As shown in FIG. 3, the frame 11 has a first side portion 11a and a second side portion 11c. The first side part 11a has a lower part formed in a semicircular shape, and an upper part connected to a flat top part 11b. The second side portion 11c is arranged to face the first side portion 11a with a predetermined interval. The lower part of the second side portion 11c is formed in a semicircular shape. The lower end portion of the first side portion 11a and the lower end portion of the second side portion 11c are connected via a bottom plate 11e. An open / close side portion 11d for inserting the communication cable 5 between the first side portion 11a and the second side portion 11c is attached to the upper end portion of the second side portion 11c. The opening / closing side portion 11d can be opened / closed around a hinge 11f fixed to the second side portion 11c side. A suspension bolt 11h is fixed to the top 11b of the frame 11 via a nut 11i. The suspension bolt 11h is connected to the utility poles 1a to 1d using a rope (not shown) or the like. The connecting portion between the first side portion 11a and the top portion 11b is reinforced by a reinforcing member 11j as shown in FIG.

  Between the first side portion 11a and the second side portion 11c of the frame 11, a pulley 12 for supporting the communication cable 5 and moving the communication cable 5 in the axial direction is disposed. As shown in FIG. 4, the outer peripheral surface 12a of the pulley 12 is formed in the circular-arc-shaped groove which considered the thickness of the communication cable. The outer diameter of the pulley 12 is slightly smaller than the width of the first side portion 11 a and the second side portion 11 c of the frame 11. A holding shaft 12b is inserted through the rotation center of the pulley 12, and both ends of the holding shaft 12b are fitted into holding holes 11g formed in the first side portion 11a and the second side portion 11c of the frame 11. Yes. As a result, the pulley 12 is rotatable about the axis about the holding shaft 12b.

  A swing arm 13 is attached to the first side portion 11a of the frame 11 so as to come into contact with the delivery side of the communication cable 5 from the pulley 12 and detect looseness of the communication cable 5 on the delivery side. The swing arm 13 has an arm main body 13a, a first guide roller 13c, and a second guide roller 13e. The arm main body 13a extends in the moving direction of the communication cable 5, and can swing in the vertical direction around a bolt as the fulcrum A. A pair of brackets 13d are attached to the tip of the arm body 13a via a shaft 13b. As shown in FIG. 3, between the pair of brackets 13d, a first guide roller 13c that is rotatable about a shaft 13b is disposed. Disposed above the first guide roller 13c is a second guide roller 13e that is supported at both ends by a pair of brackets 13d and is rotatable about an axis. The second guide roller 13e can be removed from the pair of brackets 13d in order to insert the communication cable 5 between the first guide roller 13c and the second guide roller 13e. The upper end of the restoring spring 13g is connected to the screw 13f provided at the rear end of the arm main body 13a. The lower end of the restoring spring 13g is connected to a fixing screw 13h provided on the first side 11a of the frame 11. The arm body 13a is always urged upward on the guide roller side about the fulcrum A by the tensile force of the restoring spring 13g. A stopper pin 13 i is attached to the first side portion 11 a of the frame 11 to restrict the swing arm 13 from moving upward.

  A link mechanism 14 as a power transmission means is connected to the swing arm 13. The link mechanism 14 has a function of mechanically transmitting the swing of the arm main body 13 a due to the slack of the communication cable 5 to the braking means 15. The link mechanism 14 includes a first link member 14a and a second link member 14b. The second link member 14b is a plate-like member extending in parallel with the first side portion 11a of the frame 11, and swings in the vertical direction around a bolt as a fulcrum D attached to the first side portion 11a. It is possible to move. One end of the first link member 14 a is connected to the rear end of the arm body 13 a of the swing arm 13 via a joint (joint) B. In FIG. 3, the joint B is disposed between the fulcrum A and the screw 13f connecting the restoring spring 13g. However, as illustrated in FIG. 1, the joint B may be disposed at the same position as the screw 13f. The other end of the first link member 14a is connected to the second link member 14b via a joint C. The movement of the arm main body 13a of the swing arm 13 is transmitted to the second link member 14b via the first link member 14a. The link member 14b swings up and down around the fulcrum D.

  A braking means 15 is connected to the second link member 14 b of the link mechanism 14. The braking means 15 has a function of suppressing the movement of the communication cable 5 in the axial direction by making contact with the sending side of the communication cable 5 when the swinging amount of the arm main body 13a due to the slack of the communication cable 5 exceeds a predetermined value. ing. As shown in FIGS. 1 and 5, the braking means 15 includes a first brake member 15a, a second brake member 15b, a first connecting plate 15c, a second connecting plate 15d, and a support plate 15e. Have. The first brake material 15a and the second brake material 15b are arranged so as to face each other in the vertical direction with the communication cable 5 interposed therebetween. A braking surface S1 that can contact the outer peripheral surface of the communication cable 5 is formed on the first brake member 15a, and the braking surface S1 is formed in a waveform to increase friction with the communication cable 5. Similarly, an arcuate braking surface S2 that can come into contact with the outer peripheral surface of the communication cable 5 is formed on the second brake material 15b, and the braking surface S2 has a waveform to increase friction with the communication cable 5. Is formed. As shown in FIG. 1, one end of the first connecting plate 15 c is connected to the arm main body 13 a of the swing arm 13 via a fulcrum A. One end of the second connecting plate 15d is connected to the second link member 14b of the link mechanism 14 via the joint E. The other end of the first connecting plate 15c and the other end of the second connecting plate 15d are connected to the first brake material 15a via a joint F. As described above, in FIG. 1, the first brake member 15a is connected to the first connecting plate 15c and the second connecting plate 15d, but as shown in FIG. 3, the first brake member 15a is connected. May be connected directly to the second link member 14 b of the link mechanism 14.

  As shown in FIG. 5, the second brake member 15b of the braking means 15 is supported by the frame 11 via a support plate 15e. The support plate 15e is rotatable with respect to the second side portion 11c around the support pin 15i, and is movable in the direction of the arrow with respect to the second side portion 11c. The support plate 15e has a fan-like shape in plan view, and is attached to one end so as to be rotatable about an axis G where the second brake material 15b is eccentric. A rectangular wave-shaped uneven portion 15f is formed at the other end of the support plate 15e. The uneven portion 15 f can be engaged with a positioning pin 15 g fixed to the second side portion 11 c of the frame 11. That is, the support plate 15e is configured such that the inclination is variable about the support pin 15i by changing the engagement position between the concave and convex portion 15f and the positioning pin 15g by movement in the arrow direction. The coil spring 15h provided on the support plate 15e has a function of urging the uneven portion 15f toward the positioning pin 15g. Thereby, it is possible to adjust the 2nd brake material 15b to the optimal position according to the thickness etc. of the communication cable 5. FIG.

  In the braking means 15 according to the first embodiment, the inclination of the support plate 15e is adjusted by the concavo-convex portion 15f and the positioning pin 15g. Instead of the concavo-convex portion 15f and the positioning pin 15g, a screw adjusting mechanism is adopted. May be. Further, as described above, the braking means 15 shown in FIGS. 3 to 6 shows a modification of FIGS. 1 and 2, and the configuration of the braking means 15 of FIGS. 1 and 2 is as shown in FIGS. Although it is somewhat more complicated than the configuration of the braking means 15, it is basically the same that both operate upon receiving power transmission from the link mechanism 14.

  Next, the operation in the first embodiment will be described. As shown in FIG. 9, when the communication cable 5 is laid, the cable slack preventing suspension wheel 10 is attached to the upper part of each of the power poles 1 a to 1 d. And the communication cable 5 pulled out from the cable drum 2 is wound up by the winding device 3 in a state where the communication cable 5 is supported by the pulley 12 of each cable slack preventing suspension 10 of each of the power poles 1a to 1d. Since the pulley 12 is rotatable about the axis about the holding shaft 12b, the force for winding the communication cable 5 by the winding device 3 may be small, and excessive tension acts on the communication cable 5. There is no. Here, if the cable feed amount of the cable drum 2 and the cable winding amount in the winding device 3 are the same, the communication cable 5 is not loosened between the utility poles 1a to 1d, and the communication cable 5 is extended. Work continues. However, when the cable feed amount of the cable drum 2 is larger than the winding amount of the winding device 3 during the wire drawing work of the communication cable 5, the communication cable 5 is largely slackened between the utility poles 1a to 1d. However, when the slack of the communication cable 5 becomes large, the cable slack prevention suspension wheel 10 operates as follows.

  In FIG. 1, the cable feed amount of the cable drum 2 and the cable winding amount in the winding device 3 are the same. In this state, the arm main body 13a of the swing arm 13 is kept almost horizontal. Since the first guide roller 13c and the second guide roller 13e of the swing arm 13 are always in contact with the outer peripheral surface of the communication cable 5 when the cable is laid, as shown in FIG. When it becomes larger, the arm main body 13a swings downward about the fulcrum A on the tip end side. At the same time, the rear end portion side of the arm main body 13a swings upward about the fulcrum A to push up the first link member 14a of the link mechanism 14.

  When the first link member 14a is pushed up by the swing arm 13, the second link member 14b swings around the fulcrum D. Thereby, as shown by the arrow of FIG. 2, the 2nd connection board 15d of the braking means 15 is pushed down, and the 1st brake material 15a moves below. When the swing amount of the arm body 13a of the swing arm 13 exceeds a predetermined value, the communication cable 5 is sandwiched between the first brake material 15a and the second brake material 15b, and the communication cable 5 The first brake member 15a and the second brake member 15b are in contact with the outer peripheral surface of the brake member. Since the first brake member 15a and the second brake member 15b are formed with corrugated braking surfaces S1 and S2, the frictional resistance of the contact surface is increased, and the movement of the communication cable 5 in the axial direction is suppressed. The Thereby, the sending-out amount of the communication cable 5 from the pulley 12 side is suppressed, and the communication cable 5 does not loosen greatly.

  FIG. 8 shows the movement of the second brake material 15b. As shown in FIG. 8A, when the communication cable 5 is not slack, the distance between the outer peripheral surface of the communication cable 5 and the axis G of the second brake material 15b is H1. Yes. If the communication cable 5 is slack, the distance between the outer peripheral surface of the communication cable 5 and the axis G of the second brake material 15b is H2, as shown in FIG. The entire braking surface S2 of the brake material 15b is in contact with the outer peripheral surface of the communication cable 5. Further, the axis G of the second brake material 15b is eccentric, and by making the second brake material 15b rotatable about the axis G, the braking surface S2 of the second brake material 15b communicates. It acts so as to bite into the outer peripheral surface of the communication cable 5 by the frictional force with the cable 5, and a greater braking effect can be obtained than a structure in which the communication cable 5 is simply sandwiched between the brake materials.

  After that, when the communication cable 5 is wound up by the winding device 3 and the communication cable 5 is no longer loose, the arm body 13a of the swing arm 13 swings upward, and the arm body 13a is again in the state shown in FIG. Return to. In this state, braking of the communication cable 5 by the braking means 15 is released, and the communication cable 5 moves smoothly in the axial direction by the pulley 12.

  Thus, since the link mechanism 14 as the power transmission means has a pure mechanical configuration, the braking response is higher than that of the electric control, and the large slack of the communication cable 5 is surely prevented when the cable is laid. be able to. As a result, work efficiency in cable laying work can be increased, and interference between the communication cable 5 and the passing vehicle 6 can be avoided as in the conventional case, and safety can be ensured. Moreover, since electric control is unnecessary, it can be used even in a mountainous area without a power source. Furthermore, since the structure of the link mechanism 14 can be simplified as compared with the case of using gears or hydraulic equipment, the cost can be reduced.

  In the first embodiment, electrical control is not required, but a detection switch 16 that detects a swing exceeding a predetermined value of the arm body 13a of the swing arm 13 is attached, and the fact that the looseness of the communication cable 5 has increased. You may employ | adopt the structure to notify.

(Embodiment 2)
10 to 12 show a second embodiment of the present invention. As shown in FIGS. 10 to 12, the cable slack prevention suspension wheel 20 mainly includes a frame 21, a pulley 22, a swing arm 23, a cable rod 24, and a braking means 25. The frame 21 is formed in a substantially trapezoidal shape, and has a hook 21a for hanging at the top. An opening / closing portion (not shown) for entering the frame 21 of the communication cable 5 is formed on the side of the frame 21, and the opening / closing portion can be opened / closed by a hinge 21 b attached to the side of the frame 21. It has become.

  At both left and right ends on the lower side of the frame 21, pulleys 22 for supporting the communication cable 5 and moving the communication cable 5 in the axial direction are arranged. The outer peripheral surface of the pulley 22 is formed in an arc-shaped groove in consideration of the thickness of the communication cable 5. A holding shaft 22 b is inserted through the rotation center of the pulley 22, and both ends of the holding shaft 22 b are supported by the frame 21. As a result, the pulley 22 is rotatable about the axis about the holding shaft 22b. A swing arm 23 is attached to the frame 21. The swing arm 23 includes an arm main body 23a, a guide plate 23b, and a guide roller 23d. The arm main body 23a extends in the moving direction of the communication cable 5, and can swing in the vertical direction around the fulcrum A1. An upper end portion of a restoring spring 23g is engaged with a hole 23f formed in the rear end portion of the arm main body 23a. The lower end of the restoring spring 23g is connected to a fixing screw 23h provided on the frame 21. The distal end side of the arm body 23a is constantly urged upward about the fulcrum A1 by the tensile force of the restoring spring 23g.

  A pair of guide plates 23b is attached to the tip of the arm body 23a. Between the pair of guide plates 23b, two sets of guide rollers 23d are provided at a predetermined interval in the axial direction of the communication cable 5. One set of guide rollers 23d is disposed so as to sandwich the communication cable 5 from above and below. The other set of guide rollers 23d is also arranged so as to sandwich the communication cable 5 from above and below. Each guide roller 23d is rotatable about its axis and can contact the outer peripheral surface of the communication cable 5. One guide plate 23b is cut out at the center for inserting the communication cable 5. As shown in FIG. 12, the guide plate 23b has a rotatable cover 23e for covering the cut-out portion. Installed.

  A cable rod 24 as power transmission means is connected to the swing arm 23. The cable rod 24 has a power transmission wire 24d inserted through the flexible tube 24a so as to be movable, and has a function of transmitting power via the wire 24d. One end 24 b of the flexible tube 24 a is fixed to the frame 21. The other end 24c of the flexible tube 24a is fixed to the lower lever 25a of the braking means 25. One end of the wire 24d is connected to the joint B1 of the arm main body 23a via a metal fitting 24f. The other end of the wire 24d is connected to the upper lever 25b of the braking means 25 through a metal fitting 24e.

  As shown in FIGS. 10 to 12, the braking means 25 has a lower lever 25a, an upper lever 25b, a pair of brake members 25c, and a pair of braking force adjusting portions 25d. The brake member 25c is formed in an arc shape in cross section in order to increase the contact surface with the communication cable 5. One brake member 25c is attached to the lower lever 25a via one braking force adjusting portion 25d. The other brake member 25c is attached to the upper lever 25b via the other braking force adjusting portion 25d. The lower lever 25a can swing up and down around a support pin 25a1 supported by a pair of guide plates 23b. The upper lever 25b can swing up and down around a support pin 25b1 supported by a pair of guide plates 23b. The braking force adjusting unit 25d adjusts the position of the brake material 25c using a screw, and can adjust the brake material 25c to an optimal position according to the thickness of the communication cable 5 or the like. Yes.

  Next, the operation in the second embodiment will be described. As shown in FIG. 10, when the communication cable 5 is laid, the front end side of the communication cable 5 is wound by a winding device (not shown) while being supported by the pulley 22 of the cable slack prevention suspension wheel 20. If the sending amount and the winding amount of the communication cable 5 are the same, the communication cable 5 being extended does not sag greatly, and the braking of the communication cable 5 by the brake material 25c is not performed. Next, when the amount of communication cable 5 fed out is larger than the amount of winding of communication cable 5, a large slack is generated in communication cable 5, and arm body 23a of swing arm 23 has fulcrum A1. The tip side swings downward as the center. At the same time, the rear end side of the arm body 23a swings upward about the fulcrum A1. Thereby, the wire 24d of the cable rod 24 is pulled upward by the arm main body 23a, and the lower lever 25a and the upper lever 25b move in a direction approaching each other. Therefore, as shown in FIG. 10, the communication cable 5 is sandwiched between the pair of brake members 25 c from above and below, and the friction between the brake member 25 c and the communication cable 5 prevents the movement of the communication cable 5 in the axial direction. As a result, the communication cable 5 does not loosen greatly.

  Thereafter, when the cable feed amount is reduced by the braking of the communication cable 5 and the slack of the communication cable 5 is reduced, the distal end side of the arm body 23a of the swing arm 23 swings upward, and the arm body 23a is again in the horizontal state. Return to. In this state, braking of the communication cable 5 by the braking means 25 is released, and the communication cable 5 moves smoothly in the axial direction by the pulley 22.

  As described above, in the second embodiment, the pure mechanical cable rod 24 is used as the power transmission means. Therefore, the braking response is higher than that of the electric control, and the communication cable 5 is large when the cable is laid. The slack can be surely prevented. Moreover, since electric control is unnecessary, it can be used even in mountainous areas where there is no power source. Furthermore, since the cable rod 24 can be freely bent, the degree of freedom in designing the power transmission mechanism is increased and the design is facilitated. In the cable rod 24, since the wire 24d moves along the flexible tube 24a during power transmission, it is not necessary to secure a space for swinging in the apparatus unlike the link mechanism, and the apparatus can be made compact. .

  The embodiment of the present invention has been described in detail above, but the specific configuration is not limited to the above-described embodiment, and even if there is a design change or the like without departing from the gist of the present invention, It is included in this invention. For example, in each of the above embodiments, the cable slack preventing suspensions 10 and 20 are both used for laying the communication cable 5, but the target is not only the communication cable 5 but also a power cable and other cables. Of course, it is applicable to.

It is a front view of the cable slack prevention suspension wheel concerning Embodiment 1 of this invention. It is a front view which shows the braking state of the cable in the cable slack prevention suspension vehicle of FIG. It is a perspective view of the cable slack prevention suspension wheel of FIG. FIG. 4 is an enlarged side view of the upper portion of the cable slack preventing suspension wheel of FIG. 3. It is a front view which shows the braking operation | movement of the cable in the cable slack prevention suspension vehicle of FIG. It is a side view of the cable slack prevention suspension wheel of FIG. It is a front view of the front-end | tip part of the rocking | swiveling arm in the cable slack prevention suspension wheel of FIG. FIG. 4 is a side view showing the positional relationship between the braking means and the cable in the cable slack preventing suspension shown in FIG. 3, wherein (a) is a side view showing a non-braking state of the cable, and (b) is a braking state of the cable. FIG. It is a schematic diagram which shows the cable laying operation | work using the cable slack prevention suspension vehicle of this invention. It is a front view of the cable slack prevention suspension wheel concerning Embodiment 2 of this invention. It is a top view of the rocking | swiveling arm vicinity in the cable slack prevention suspension wheel of FIG. It is a rear view of the vicinity of the swing arm in the cable slack preventing suspension wheel of FIG. It is a schematic diagram which shows the conventional cable laying operation | work. It is a schematic diagram which shows the slack generation | occurrence | production situation of the cable in the cable laying operation | work of FIG.

Explanation of symbols

2 Cable drum 3 Winding device 5 Cable (communication cable)
10 Cable slack prevention suspension wheel 11 Frame 12 Pulley 13 Swing arm 14 Link mechanism (power transmission means)
DESCRIPTION OF SYMBOLS 15 Braking means 20 Cable slack prevention suspension wheel 21 Frame 22 Pulley 23 Swing arm 24 Cable rod (power transmission means)
25 Braking means

Claims (4)

A pulley for supporting the cable and moving the cable in the axial direction;
A swinging arm that contacts the delivery side of the cable from the pulley and detects looseness on the delivery side of the cable;
Power transmission means for mechanically transmitting the swing of the swing arm due to the slack of the cable;
Braking means that is driven by the power transmission means and contacts the cable delivery side when the swing amount of the swing arm due to the slack of the cable exceeds a predetermined value, and suppresses axial movement of the cable;
A cable slack prevention suspension vehicle characterized by comprising:   2. The cable slack preventing suspension vehicle according to claim 1, wherein the power transmission means includes a link mechanism.   2. The cable slack according to claim 1, wherein the power transmission means comprises a cable rod having a flexible tube that can be bent and a power transmission wire that is movably inserted into the flexible tube. Prevent suspension car.   The cable slack preventing suspension vehicle according to claim 1, wherein the braking means is configured such that a braking force can be adjusted.

Images