JP5113589B2 - Rope fixing device - Google Patents

Description

  The present invention relates to a rope fixing device for fixing a rope installed between steel towers to a steel tower, and in particular, a rope for extending a transmission line suspended in a hollow by a helicopter or the like is automatically fixed to the steel tower. The present invention relates to a rope fixing device suitable for this.

  Conventionally, when a transmission line is stretched on a steel tower, instead of stretching the transmission line from the beginning, a rope for extension (stretching rope) is first stretched, and the extension rope is replaced with a steel wire as a guide. Finally, a method of replacing the power transmission line and erection is used.

  First, when a rope along the railway line is installed, especially when it is difficult to work on the ground in mountainous areas, a helicopter is used.

  FIG. 9 is a diagram showing an outline of a conventional construction for extending a wire rope. There is an average distance of about 250 meters between each tower, and a wire rope is installed on about 10 towers at a time. Two to three workers are waiting at the helicopter in the upper part of each tower (the position of the transmission line overhead line). At the bottom of the helicopter, a drum wound with a wire rope is installed and ascends from the starting point of wire drawing on the ground called the “drum field”. When the worker who has boarded the helicopter reaches the sky above the first tower while drawing the wire rope from the drum, the worker guides the wire rope to the position where the worker is waiting. The worker waiting at the top of the tower receives the suspended wire rope while receiving the wind pressure from the helicopter, and ties it to the brace of the transmission tower with strings and fixtures. The helicopter who received the signal of the completion of lashing flies to the next steel tower while drawing the wire rope from the drum, and performs the same lashing work.

  In this way, a state in which the wire rope is secured to about 10 power transmission towers is created, and the helicopter descends to the overhead wire end point called the “engine station”, and the installation work of the wire rope is completed.

  The work to replace the wire rope with the steel wire and the power transmission line is performed on another day as follows. The wire rope once tied to the armrest of the steel tower is tied up by the worker and transferred to the gold wheel. A gold wheel is a pulley used to work on the extension of power transmission lines. After all the steel towers are in the state where the wire rope is put on the gold wheel, the end of the wire rope is connected to the steel wire at the drum field, and the other wire rope is pulled at the engine field. The wire rope is replaced with a steel wire, and the steel wire is replaced with a transmission line in the same way, and the installation of the transmission line is completed.

  As a conventional construction method for constructing a transmission line using such a helicopter, a construction method for constructing a messenger wire (extended wire rope) with an unmanned helicopter is disclosed (Patent Document 1).

In addition, as a method of installing a steel wire between steel towers with a long span using a helicopter, a method of installing an aerial cable while controlling tension is disclosed (Patent Document 2).
JP-A-6-276634 JP-A-8-144218

  When installing a transmission line, it is necessary to install a wire rope using a helicopter. However, since this transmission line is installed by the method described above, the following operational safety aspects are required. In addition, cost issues arise.

  In other words, workers who work at high altitudes are required to actually go up to the top of the steel tower and perform work in the normal visual inspection and installation work of transmission lines. In addition to the danger at high altitudes, the wire rope must be secured while balancing the wind pressure caused by the helicopter hovering near the tower. Also, when catching a wire rope that moves in the air and fixing it to the armrest of a steel tower, there is an increased risk of force being applied to the rope due to unexpected movement of the helicopter. It is difficult to secure to a steel tower.

  In addition, when installing the wire rope, it is necessary to secure 20 or more workers working on the upper part of the tower.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rope fixing device that can safely and reliably fix a wire drawing rope to a steel tower by remote control from a helicopter, instead of work by an operator at the top of the steel tower. is there.

  In order to achieve the above object, the first technical means of the rope fixing device of the present invention is a rope fixing device attached to a steel tower for fixing the rope laid between the steel towers to the steel tower. A groove portion of a predetermined length for accommodating a rope entering from the upper opening portion, a lock release mechanism portion for releasing the locked state when the rope is received in the groove portion, and releasing the locked state to And a rope fixing portion that presses against a side surface of the groove portion and closes an upper opening portion of the groove portion to fix the rope.

  The rope fixing device of the present invention is attached to the steel tower in advance before the rope erection work with the fixing portion locked. When the rope coming down from the helicopter is received in the groove, the locked state of the rope fixing part is released. By releasing the locked state, the rope fixing part is received in the groove and presses the rope against the side surface of the groove and The rope is fixed in the groove portion by closing the upper opening portion.

  According to a second technical means of the rope fixing device of the present invention, in the first technical means, the rope fixing portion includes a clamp member that suppresses movement of the rope in the groove in the length direction. Features.

  This clamp member prevents the rope from moving back and forth (in the length direction) when the rope moves back and forth (moves in the length direction) due to its own weight or movement of the helicopter.

  According to a third technical means of the rope fixing device of the present invention, in the first or second technical means, the unlocking mechanism portion has a switch provided at a bottom portion of the groove portion, and the rope is the switch. It is characterized in that the locked state is released by touching to.

  This switch is provided to release the locked state at the bottom of the groove so that the locked state is released after the rope is completely accommodated in the groove.

  According to a fourth technical means of the rope fixing device of the present invention, in any one of the first to third technical means, the length direction of the groove portion is inclined up and down by a predetermined angle with respect to a horizontal plane. It is attached to the said steel tower so that rocking is possible.

  In this fourth technical means, the rope fixing device can be attached at a predetermined angle from the horizontal to the right and left with a light force, so that the rope approaches the horizontal surface of the rope fixing device at an angle. However, the horizontal plane of the rope fixing device can be aligned with the length of the rope. As a result, a length sufficient to fix the rope can be accommodated in the groove.

  According to a fifth technical means of the rope fixing device of the present invention, in any one of the first to fourth technical means, the rope fixing portion includes a spring that presses the rope against a side surface of the groove portion. By releasing the state, the spring that has been compressed and held in the locked state is released, so that the spring presses the rope against the side surface of the groove.

  The fifth technical means has an effect that the rope can be fixed by a relatively simple structure using the force of the spring.

  A sixth technical means of the rope fixing device according to the present invention includes a display unit for displaying that the rope is fixed by the rope fixing part in any of the first to fifth technical means. Features.

  This display unit is provided so that an operator on board the helicopter can confirm the completion of the rope fixing from a distance.

  A seventh technical means of the rope fixing device of the present invention is the above-mentioned sixth technical means, wherein the display unit stores a display flag and the case so that the case lid is kept closed. A pin attached to the rope, and a connecting means for connecting the rope fixing portion and the pin, and the movement of the rope fixing portion by releasing the locked state causes the pin to come off from the case and open the lid of the case, The display flag appears outside the case.

  According to an eighth technical means of the rope fixing device of the present invention, in the sixth technical means, the display portion is exposed to the outside so as to be visible in a locked state of the rope fixing portion, and the rope fixing by unlocking is performed. It is in the part of the rope fixing part that cannot be visually recognized from the outside due to the movement of the part, and the part has a colored part of a color different from other parts of the rope fixing part.

  According to a ninth technical means of the rope fixing device of the present invention, in any one of the first to eighth technical means, the rope fixing device includes a guide portion that guides the rope to the upper opening portion of the groove portion. .

  This guide portion functions so that the operator of the helicopter can easily guide the rope to the groove portion of the rope fixing device.

  According to a tenth technical means of the rope fixing device of the present invention, in the ninth technical means, a temporary placing portion for placing the rope on which the guide portion moves along the guide portion is placed on the guide portion. It is characterized by having.

  This guide part functions so that the rope can be dropped (guided) into the groove part at an appropriate speed.

  The present invention can secure a rope derived from a helicopter to the upper part of the tower safely and securely without installing an operator at the upper part of the tower in the construction work of the extension line in the construction of the transmission line. is there. Therefore, it is possible to release the worker from the dangerous work of the conventional lashing work and to reduce the cost of the worker in the construction using the helicopter which is influenced by the weather. The present invention can be applied to a rope installation work for a bridge, a rope installation work for a dam construction, and the like in addition to a construction for constructing a transmission line.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an external perspective view of a rope fixing device 1 according to an embodiment of the present invention. The rope fixing device 1 is attached to a pedestal 2, and the rope fixing device 1 is attached to the steel tower by fixing the pedestal 2 on the armature of the steel tower (portion extending laterally from the steel tower). Can do. The rope fixing device 1 has a mechanism for fixing an extension rope guided by a helicopter from above, and the overall dimensions of the rope fixing device 1 are about 375 mm in length, 115 mm in width, and 120 mm in height. , Made of stainless steel material. The weight excluding the guide part described later is about 13 kg. FIG. 1 shows a state where a wire drawing rope (for example, a diameter of 16 mm) is fixed to the rope fixing device 1. The means for fixing the wire rope will be specifically described with reference to FIG. 2 is an internal side view of the rope fixing device, FIG. 2 (a) shows a state before the rope fixing operation of the rope fixing device 1, and FIG. 2 (b) shows a state after the rope fixing operation. .

  The rope fixing device 1 includes a groove portion 10 having a predetermined length that opens upward so as to accommodate an extended rope (hereinafter simply referred to as a rope) approaching from above. Preferably, an introduction portion 11 for introducing a rope into the groove portion 10 is provided. The introduction portion 11 has a shape that spreads upward as shown in the figure, and a rope approaching from above is inserted into the groove portion 10. It is designed in a shape that can be guided to enter easily.

  A fixing portion 12 that presses the introduced rope is provided on the side of the groove portion 10, and a lid portion 12 a that closes the upper opening portion of the groove portion 10 is attached to the fixing portion 12. The lid portion 12a functions to prevent the rope from being pulled upward from the groove portion 10 when the fixing portion 12 is operating and pressing the rope.

  The fixing portion 12 is movable in the left-right direction in the figure, and is provided so that it can be moved to the left side by pulling the handle 13. Further, a spring 14 is attached to the fixed portion 12, and when the handle 13 is pulled to move the fixed portion 12 leftward, the spring 14 is compressed. When the handle 13 is further pulled leftward, a small spring 15 built in the inside of the fixing portion 12 acts to push down the tip protrusion of the lock pin 16 and insert it into a hole provided on the lower side. Become. In this state, the fixing portion 12 is locked while the spring 14 is maintained in the compressed state. FIG. 2A shows a state in which the fixing portion 12 is locked.

  Next, means for releasing the locked state of the fixing portion 12 will be described with reference to FIG. FIG. 2B shows a state in which the lock of the fixing portion 12 is released and the rope is fixed to the groove portion 10 by the fixing portion 12 and the lid portion 12a. A lock release mechanism 18 for releasing the locked state of the fixed portion 12 is provided at the bottom of the groove portion 10. When the rope descends with its own weight along the introduction part 11 and is guided to the groove part 10, the rope pushes down the switch (plate) 18a of the unlocking mechanism 18 installed at the bottom of the groove part 10 with its own weight. At this time, because of the lever principle, the unlocking portion 18b at the other end of the unlocking mechanism 18 rises and pushes up the lock pin 16, so that the protruding portion of the lock pin 16 inserted into the hole is fixed to the fixing portion 12. The lock will be released. When the lock is released, the fixing portion 12 and the lid portion 12a thereon slide to the right by the force of the spring 14 maintained in a compressed state, and the fixing portion 12 moves the rope in the groove portion 10 on its side surface 23. At the same time, the lid portion 12a closes the upper opening portion of the groove portion 10, and the rope is firmly fixed in the groove portion 10. In this state, the lid portion 12a closes (closes) the upper opening portion of the groove portion 10, so that even if an upward force is applied to the rope, the rope does not come out upward.

  The rope fixing device 1 of the present invention has a structure shown in FIG. 3A shows a state before the rope fixing operation of the rope fixing device 1, and FIG. 3B shows a state after the rope fixing operation. Referring to the structure shown in FIG. 3, the fixing portion 12 includes two springs 14 and a handle 13, and the lid portion 12 a has the same width as the fixing portion 12. A switch (plate) 18 a for releasing the lock by the lock pin 16 is installed near the center of the groove 10. This is because when the switch 18a is close to the end, the lock may be released only by one end of the rope coming into contact with the end of the groove 10 to prevent the rope from being fixed sufficiently. It is.

  Further, the side surface 23 of the fixing portion 12 is provided with unevenness for preventing slipping in order to firmly fix the rope. This unevenness makes it possible to firmly fix the rope while pressing the rope with the fixing portion 12 and the lid portion 12a. Instead of the uneven surface of the side surface 23, the fan-shaped clamp 20 may be installed to make a pair on the side opposite to the fixed portion 12. The fan-shaped clamp 20 shown in FIG. 3 is provided with a jagged tooth surface on the contact surface side of the rope. Since the tooth surface is engaged with the rope and tightened, the rope moves in the length direction of the groove portion 10. Can be deterred.

  As described above, in the rope fixing device 1 according to the present invention, the operator ties the rope with a string or a fixture by the pressing force by the spring 14 of the fixing portion 12 and the tightening force by the jagged tooth surface of the fan-shaped clamp. It is possible to achieve rope fixing equivalent to or better than that. In addition, although the shape of the clamp shown in FIG. 3 is a sector shape, it is not restricted to this sector shape.

  Next, the state where the rope fixing device 1 of the present invention is attached to the base 2 on the armature of the steel tower will be described with reference to FIG.

  4A shows a state in which the rope fixing device 1 is horizontally attached to the pedestal 2, FIG. 4B shows a state in which the rope fixing device 1 is attached to be inclined, and FIG. ) Is a diagram showing a state in which the rope fixing device 1 is swinging.

  The rope fixing device 1 of the present invention is swingable (swingable) so that it can be tilted up and down by a predetermined angle in a direction (the length direction of the rope) perpendicular to the direction in which the fixing portion 12 moves in the horizontal plane. 2 is attached. When the rope approaches the surface of the groove 10 of the rope fixing device 1 at a certain angle, even if the rope comes into contact with one end of the rope fixing device 1 and a force acts, the rope is fixed against the force. Since the device 1 is mounted so as to swing, the surface of the groove 10 can naturally follow the inclination direction of the rope. Therefore, since the rope can contact the surface of the groove portion 10 over a certain range, only one end of the rope is not fixed, and the rope is pressed and fixed on the entire surface of the fixing portion 12. It becomes possible.

  The angle at which the rope fixing device 1 swings and tilts can be set as appropriate depending on the thickness of the rope and the size of the rope fixing device, and the swing structure (swing structure) capable of tilting about 15 to 25 degrees up and down. ), It works effectively for this rope fixing device. For example, if it is about 15 degrees up and down with respect to a horizontal plane, it can be easily inclined with a light force.

  The rope fixing device 1 is preferably provided with auxiliary members such as a guide portion 21 and a display portion 22 around the rope fixing device 1. FIG. 5 shows a general situation in which the guide portion 21 and the display portion 22 are attached.

  Since the rope fixing device 1 is mounted on the armature of the steel tower, it is necessary to reliably guide the wire drawing rope to the narrow groove portion 10 of the rope fixing device 1 by remote control from the helicopter. Since there is a case where it is difficult to align the rope with the position of the groove portion 10 alone, an auxiliary member that can safely and surely guide the rope to the introduction portion 11 is installed around the rope fixing device 1. It is preferable to do. FIG. 5 shows a guide portion 21 composed of a guide rail 21a and an exchange 21b as an example. The guide portions 21 are provided on both sides of the rope fixing device 1 and serve to guide the rope safely and reliably to the introduction portion 11 and the groove portion 10 of the rope fixing device 1. In many cases, the armature of a steel tower is generally attached so as to be lowered in a direction away from the steel tower side. Therefore, a guide rail 21a along the armature is provided on the steel tower side, and a rail is dropped on the remote side. It is preferable to provide the transmission 21b for prevention as the guide portion 21. With such a guide portion 21, the operator of the helicopter can guide the rope to the rope fixing device 1 safely and reliably.

  The guide rail 21a may be made of metal from the viewpoint of strength, but it is preferable that the guide rail 21a is lightweight in order to work on the steel tower. Therefore, considering that the rope is not damaged by friction, the guide rail 21a may be made of plastic. Good.

  In order to guide the rope safely and reliably, it is preferable to further provide a temporary placement portion 21c in the guide portion. FIG. 6 shows another example of the shape of the guide portion 21 provided with the temporary placement portion 21c. The temporary placing portion 21c in this example is for temporarily placing the rope before guiding the rope to the groove portion 10, and is recessed or recessed on the guide rail 21a and / or the sending out 21b that the rope contacts and moves. It can be configured by providing a step or the like.

  When the temporary placement portion 21c is provided on the guide portion 21, the following operational effects are obtained. In other words, the wire rope will be stretched between steel towers with a certain amount of slack. At that time, the rope is temporarily placed on the temporary holding portion 21c, and the helicopter is moved forward and backward (direction between steel towers). As a result, the slack can be adjusted. In addition, when the rope suddenly contacts the rope fixing device 1 vigorously, the rope floats due to the reaction, and an unstable fixing state occurs, and the rope cannot be guided well to the groove portion 10 by bouncing. Although there is a possibility that a situation may occur, when the temporary placement portion 21c is provided in the guide portion 21, the rope can be temporarily placed, so that sudden contact and bouncing of the rope can be prevented in advance and an appropriate amount can be obtained. A rope can be dropped (guided) into the groove 10 at a speed. In addition, it is preferable to design the guide rail 21a and the exchange 21b of the guide part 21 so that the installation angle and the installation length can be appropriately adjusted. In FIG. 6, the installation angle of the exchange 21b can be adjusted. This is illustrated.

  In the rope fixing device 1 of the present invention, although not shown, when the rope is fixed in an unstable state or when the lock mechanism is released in a state where the rope is not well accommodated in the groove portion 10 Can be designed so that the fixing portion 12 can be locked again by moving the fixing portion 12 in the left direction indicated by the arrow in FIG. 2 by operating the motor by remote control.

  Next, a display unit that displays unlocking will be described. As shown in FIG. 5, the display unit 22 is suspended from an arm metal or the like, and is a means for displaying that the rope accommodated in the groove 10 is fixed by the fixing unit 12. When the rope 12 is normally operated and the rope is fixed, the completion of the operation is transmitted to the helicopter worker.

  A specific configuration example of the display unit 22 is shown in FIG. 7A and 7B are a side view and a front view inside the display unit 22 in the standby state, and FIGS. 7C and 7D are a side view and a front view inside the display unit 22 in the operating state. FIG. In the display unit 22, a display flag 22a is stored in an elongated case in a standby state. When installing the rope fixing device 1, the handle 13 is pulled to lock the fixing portion 12. At this time, the locking pin 22 c attached to the end of the locking pin pull-out chain (connection means) 22 b connected to the fixing portion 12. Then, the lid of the case of the display unit 22 is closed, and the chain 22b is installed without loosening (FIGS. 7A and 7B). When the locked state is released and the fixing portion 12 slides in the direction of pushing the rope, the locking pin 22c is pulled out by pulling the chain 22b. As a result, the lid of the display unit 22 is opened, and the display flag 22a stored therein hangs down (FIGS. 7C and 7D). The operator of the helicopter can visually confirm that the display flag 22a appears outside, so that it can be confirmed that the wire rope is fixed to the steel tower.

  The display unit 22 can be attached to the armrest of the steel tower with a magnet incorporated on one side (see FIG. 5). Since the magnet can be easily removed, the looseness of the retaining pin pull-out chain 22b can be easily adjusted by shifting the mounting position of the display unit 22.

  FIG. 8 is a diagram illustrating another configuration example of the display unit 22. FIG. 8A shows the position of the display unit 22 in the standby state, and FIG. 8B shows the position of the display unit 22 in the operating state. The display unit 22 in FIG. 8 is exposed to the outside so as to be visible when the fixing unit 12 is in the locked state, and is hidden inside the rope fixing device 1 when the locking state of the fixing unit 12 is released and the fixing unit 12 slides. , Which is in a part that cannot be visually recognized, and the part is given a color different from other parts so that it can be visually recognized from a distance. When the color becomes invisible, it is possible to determine that the rope is normally fixed by the fixing unit 12. Further, not only coloring but also coloring, for example, as a symbol or a character may be performed. In this configuration example, when the rope is in an unstable fixed state, or when the lock mechanism is released while the rope is not well accommodated in the groove 10, the rope is fixed again by remote control or the like. It is valid.

It is an appearance perspective view of a rope fixing device in an embodiment of the invention. It is an internal side view of a rope fixing device. It is the top view which looked at the inside of a rope fixing device from the upper surface. It is a figure which shows the state connected with the base 2 with which a rope fixing apparatus is fixed to the armrest of a steel tower. The state which installed the guide part and the display part in the rope fixing apparatus 1 is shown. It is a figure which shows another example of a shape of a guide part. 3 is a diagram illustrating a configuration example of a display unit 22. FIG. 6 is a diagram illustrating another configuration example of the display unit 22. FIG. It is a figure which shows the outline | summary of the construction which stretches the conventional wire drawing rope.

Explanation of symbols

  1: rope fixing device, 2: pedestal, 10: groove portion, 11: introduction portion, 12: fixing portion, 12a: lid portion, 13: handle, 14: spring, 15: spring, 16: lock pin, 18: unlocking Mechanism, 18a: Switch, 18b: Unlocking part, 20: Fan clamp, 21: Guide part, 21a: Guide rail, 21b: Transfer, 21c: Temporary placing part, 22: Display part, 22a: Display flag, 22b : Chain, 22c: Stop pin, 23: Side

Claims (10)

In the rope fixing device attached to the steel tower to fix the rope erected between the steel towers to the steel tower,
A groove of a predetermined length for accommodating a rope entering from an upper opening that is open when locked;
An unlocking mechanism that releases the locked state when a rope is received in the groove;
A rope fixing device, comprising: a rope fixing portion that presses a rope in the groove portion against a side surface of the groove portion and closes an upper opening portion of the groove portion to fix the rope by releasing the locked state. In claim 1,
The rope fixing portion includes a clamp member that inhibits the rope in the groove portion from moving in the length direction of the rope. In claim 1 or 2,
The unlocking mechanism has a switch provided at the bottom of the groove, and the rope is released when the rope comes into contact with the switch. In any one of Claims 1 thru | or 3,
The rope fixing device is attached to the steel tower so as to be swingable so that a length direction of the groove portion is inclined up and down by a predetermined angle with respect to a horizontal plane. In any one of Claims 1 thru | or 4,
The rope fixing portion has a spring that presses the rope against the side surface of the groove portion, and the release of the locked state releases the spring that is compressed and held in the locked state, so that the spring causes the rope to move to the groove portion. A rope fixing device that is pressed against a side surface. In any one of Claims 1 thru | or 5,
A rope fixing device comprising: a display unit for displaying that the rope is fixed by the rope fixing unit. In claim 6,
The display unit includes a case for storing a display flag, a pin attached to the case so as to keep the lid of the case closed, and a connecting means for connecting the rope fixing unit and the pin, and is in a locked state. The rope fixing device according to claim 1, wherein the pin is removed from the case and the case lid is opened by the movement of the rope fixing portion by releasing the display, and the display flag appears outside the case. In claim 6,
The display portion is located at a portion of the rope fixing portion that is exposed to the outside so as to be visible in a locked state of the rope fixing portion and is not visible from the outside due to movement of the rope fixing portion by unlocking, Has a colored portion having a different color from other portions of the rope fixing portion. In any one of Claims 1 thru | or 8,
A rope fixing device comprising a guide portion for guiding the rope to an upper opening portion of the groove portion. In claim 9,
The rope fixing device according to claim 1, wherein the guide portion includes a temporary placement portion for placing a rope moving along the guide portion on the guide portion.