JP7653322B2 - Snow-resistant ring installation device for overhead wires and method for installing snow-resistant rings using the same - Google Patents

Description

The present invention relates to a device that is operated by a worker riding on a suspended aircraft suspended from an overhead wire while moving along the overhead wire to attach a snow-resistant ring to the overhead wire, and a method for attaching a snow-resistant ring using the same.

Conventionally, to prevent snow from accumulating on electric wires, snow-resistant rings have been attached to overhead electric wires at regular intervals (e.g., 600 mm intervals). These rings are flexible rings with slits and mutual engagement parts formed at both ends. They are placed on the electric wire with the slits open, and are fixed by crimping (butt-engaging) the engagement parts (e.g., Patent Document 1, Figure 9). Patent Document 1 proposes a device that attaches rings at regular intervals while traveling on an overhead electric wire. However, the mainstream method of installation is for a worker to attach the rings one by one by crimping them using hand tools while moving around on a flying machine suspended from the overhead wire.

Japanese Patent Application Publication No. 63-265505

In manual work performed by workers aboard the aerial vehicle, in order to reduce the burden on the worker, it is desirable to connect a semi-automatic attachment device to the aerial vehicle and have the worker operate this attachment device to attach the snow-resistant ring. Incidentally, a damper is attached to the overhead wire within the span of the overhead wire in order to suppress twisting of the overhead wire when snow accumulates. In the case of such an overhead wire, the aerial vehicle cannot pass over the damper. For this reason, the aerial work must be performed in two parts, from each steel tower supporting the overhead wire on both sides of the span to the damper installation position. In order to perform continuous work on one span, the damper must be removed once, and after the aerial vehicle passes through this, the damper must be reattached, which is a damper removal and installation work. However, if the attachment device is connected to the front or rear of the aerial vehicle, this attachment device becomes an obstacle, and there is a problem that the worker cannot perform the damper removal and installation work.
Therefore, the objective of the present invention is to provide a snow-resistant ring installation device that is connected to an aerial vehicle and that allows an operator on the aerial vehicle to easily install and remove dampers while the installation work of the snow-resistant ring is carried out continuously and quickly over one span, and a method for installing the snow-resistant ring using the same.

In the following description, reference will be made to reference numerals in the accompanying drawings, but the present invention is not limited thereto.
In order to solve the above problem, the snow-resistant ring mounting device 1 (hereinafter also referred to as the "mounting device") of the present invention is connected to the rear part of the aerial vehicle 101 opposite to the traveling direction so as to be freely rotatable horizontally around a vertical axis 7a, and is configured to be rotatable at a predetermined angle between a working position and a retreating position. The mounting device 1 is placed on an overhead line W such as an overhead electric wire at the working position, and is capable of mounting the snow-resistant ring R, and is removed from the overhead line W at the retreating position to open the overhead line W. The worker removes the damper D in the traveling direction and passes the aerial vehicle 101 through the damper mounting position, and then performs the installation operation of the snow-resistant ring R, after which the mounting device 1 on the damper mounting position is rotated to the retreating position to open the damper mounting position on the overhead line W, and the damper D can be re-mounted.

According to the present invention, even for overhead lines where dampers are installed during the line extension, snow-resistant rings can be continuously installed on one span between towers using a flying machine.

1 is a front view of the snow-resistant ring mounting device of the present invention. FIG. 2 is a rear view of the snow-resistant ring mounting device of FIG. 1 . FIG. 2 is a side view of the snow-resistant ring mounting device of FIG. 1 . FIG. 2 is a plan view of the snow-resistant ring mounting device of FIG. 1 . 2 is a rear view of the running body in the snow-resistant ring mounting device of FIG. 1 . FIG. 6 is a view taken along the arrow VI in FIG. 5 . 2 is a plan view of a running body in the snow-resistant ring mounting device of FIG. 1 . 2 is a schematic side view of a rear support roller portion in the snow-resistant ring mounting device of FIG. 1 . FIG. 2 is an explanatory diagram of a main body of the snow-resistant ring mounting device of FIG. 1. FIG. 2 is an explanatory diagram of an operation state using the snow-resistant ring mounting device of FIG. 1. 2 is a schematic plan view showing the sequence of steps for using the snow-resistant ring mounting device of FIG. 1. 2 is a schematic plan view showing the sequence of steps for using the snow-resistant ring mounting device of FIG. 1.

As shown in Figure 10, the snow-resistant ring R attachment device 1 is pulled by a flying machine 101 on which an operator rides and travels intermittently along an overhead wire W while continuously attaching snow-resistant rings R onto the overhead wire W, and is equipped with a running body 2 that travels along the overhead wire W, and a main body 3 that is supported on the lower part of the running body 2. The main body 3 can be operated by an operator to attach the snow-resistant ring R onto the overhead wire W. Hereinafter, the traveling direction will be referred to as the forward direction, the opposite direction as the backward direction, etc., and the left and right of the traveling direction will be referred to as the right side, the left side, etc., respectively.

As shown in Figures 1 to 4, the running body 2 comprises a running body frame 5 and a connecting member 6. The running body frame 5 supports a running means such as a pair of front and rear running rollers 4 that roll on an overhead wire W. The connecting member 6 connects the front end side of the running body frame 5 to the rear end side of the aerial vehicle 101.

As shown in Figures 5 to 7, the running body frame 5 has a top plate 5a and a pair of parallel side plates 5b, 5c that extend vertically downward from both the left and right edges of the top plate 5a. The running roller 4 is supported between the left and right side plates 5b, 5c. The connecting member 6 includes a hinge member 7 having a pair of wing plates 7b pivoted relative to each other by a vertical shaft 7a, and connects the front end of the running body frame 5 to the rear end of the aerial vehicle 101 so as to be freely rotatable horizontally around the vertical shaft 7a.

In Figures 1 to 4, the main body 3 includes a main body frame 8 that is connected to the lower part of the running body frame 5. An attachment mechanism 9 having an operating lever 26 for attaching the snow-resistant ring R to the overhead wire W is assembled on the main body frame 8.

As shown clearly in Figures 1, 2 and 5, the main frame 8 has a pair of left and right side plates 8a, 8b fixed parallel to each other at a distance corresponding to the side plates 5b, 5c of the running body frame 5. The upper edge of one side plate 8a is attached to the lower edge of one side plate 5b of the running body frame 5 at the front by a fastener 10 so as to be freely engaged and disengaged. The upper edge of the other side plate 8b is connected to the lower edge of the other side plate 5c of the running body frame 5 at the front by a hinge 11 so as to be freely rotatable about a horizontal axis.

A rear support roller 12 is provided at the rear of the main body frame 8 to support the rear of the main body 3 on the overhead wire W. As shown in FIG. 8, the rear support roller 12 is supported by an arch-shaped roller frame 13 having a pair of bearing plates 13a, 13b. The lower edge of one bearing plate 13a of the roller frame 13 is attached to the rear upper edge of the side plate 8a by a fastener 14 so as to be freely engaged and disengaged. The lower edge of the other bearing plate 13b is connected to the rear upper edge of the other side plate 8b by a hinge 15 so as to be freely rotatable about a horizontal axis.

Therefore, in the open position shown by the phantom lines in FIG. 3, where the side plate 5b of the running body frame 5 is open to the side plate 8a of the main frame 8, and where the side plate 8a is open to the bearing plate 13a of the roller frame 13, the running rollers 4 and rear support rollers 12 of the running body 2 are positioned on the overhead line W, and in the closed position shown by the solid lines in FIG. 3, where the running body frame 5 and roller frame 13 are closed to the main frame 8, the overhead line W is held between the running body frame 5 and roller frame 13 and the main frame 8.

A lower roller 16 is provided at the front of the main body frame 8 so as to roll on the underside of the overhead wire W opposite the running roller 4 when the main body 3 is in the closed position.

As shown in FIG. 9, the attachment mechanism 9 includes a ring supply mechanism 17 and a crimping mechanism 18. The ring supply mechanism 17 feeds the snow-resistant rings R one after another to a predetermined installation standby position directly below the overhead wire W, and includes a guide member 19, a ring slider 20, and a stopper 21.

The guide member 19 is provided between the left and right side plates 8a, 8b of the main frame 8 so as to guide the connected mass of snow-resistant rings R from the lower loading position to the upper standby position. As shown in FIG. 8, the snow-resistant rings R are supplied onto the guide member 19 through the loading opening 8c formed in the side plate 8a with the engaging portions at both ends open upward.

The ring slider 20 pushes up the connected body of the snow-resistant ring R on the guide member 19 toward the installation standby position with the force of a constant-load spring 23 connected via a wire 22.

The stopper 21 is provided at the tip of the guide member 19 so as to position the snow-resistant ring R at the tip of the ring connector in the installation standby position.

The crimping mechanism 18 comprises a scissors-shaped crimping claw 24, a link mechanism 25, and an operating lever 26.

The crimping claw 24 opens and closes to close the engagement portion of the snow-resistant ring R arranged in the installation standby position, and fixes the snow-resistant ring R to the outer circumference of the overhead wire W. The link mechanism 25 is interposed between the crimping claw 24 and the operating lever 26, and transmits the swing of the operating lever 26 to the crimping claw 24, causing it to open and close.

The operating lever 26 is pivoted to the main frame 8, and as shown in FIG. 10, its upper part extends upward so that an operator on the aerial vehicle 101 can swing it.

If the operating lever 26 is pulled accidentally during movement, the crimping claws 24 will be damaged, so a lever lock mechanism 28, best shown in Figure 5, is provided between the running body 2 and the main body 3.

The lever lock mechanism 28 includes a travel detection mechanism 29 provided on the travel body 2 to detect the rotation of the travel roller 4, and a stopper mechanism 31 provided on the main body 3 to lock the rotation shaft 30 of the operating lever 26 while the travel detection mechanism 29 is detecting travel.

The travel detection mechanism 29 includes a drive lever 33 pivoted to the travel frame 5 so as to rotate to a locked position in response to the rotation of the rotation shaft 32 of the travel roller 4. The stopper mechanism 31 includes a lock lever 34 pivoted to the main frame 8 so as to engage with the rotation shaft 30 in response to the rotation of the drive lever 33.

A passive sprocket 35 is supported at the tip of the drive lever 33 with a certain amount of frictional resistance. A drive sprocket 36 is fixed to the rotating shaft 32 of the traveling roller 4. A chain 37 is hung between the sprockets 35, 36. When the traveling roller 4 rotates, the passive sprocket 35 rotates passively, but the rotational resistance causes the drive lever 33 to rotate to the locked position. The rotation of the drive lever 33 is transmitted to the lock lever 34 via the wire 38, and the lock lever 34 rotates to the locked position and engages with the rotating shaft 30, preventing the rotation of the operating lever 26.

The work of attaching the snow-resistant ring R to the overhead wire W using the attachment device 1 is carried out, for example, as follows.

The mounting device 1 is raised onto the steel tower supporting the overhead wire W, and connected to the rear of the aerial vehicle 101, which has already been mounted on the overhead wire W, via the connecting member 6, and the running roller 4 and rear support roller 12 are placed on the overhead wire W. At this time, the fasteners 10 and 14 are opened to open the gap between the running frame 5 and the main frame 8 and between the roller frame 13 and the main frame 8 (phantom lines in Figure 3), and the overhead wire W is introduced between them. Next, the gap between the running frame 5 and the main frame 8 and the gap between the roller frame 13 and the main frame 8 are closed, and the fasteners 10 and 14 are tightened.

The handle 27 for pulling out the constant force spring 23 is turned to the automatic temporary locking position, and the constant force spring 23 is pulled out, so that the ring slider 20 is positioned at the loading position below the guide member 19, and the connected body of the snow-resistant ring R is loaded onto the guide member 19 through the loading opening 8c.

When the handle 27 is reversed to release the temporary fastening and release the constant force spring 23, the ring slider 20 pushes the connected body of the snow-resistant rings R up along the guide member 19. The connected body stops at a position where the tip of the snow-resistant ring R abuts against the stopper 21, and the tip of the snow-resistant ring R is positioned in a standby position for installation directly below the overhead wire W.

As shown in Figure 10, the worker gets on the aerial vehicle 101, pulls the attachment device 1, and advances to a predetermined position on the overhead wire W. When the operating lever 26 is pulled and returned, the crimping claws 24 open and close, and the snow-resistant ring R located at the tip of the ring connecting body is fixed to the overhead wire W, and the next snow-resistant ring R is placed in a standby position for attachment. The worker advances intermittently at predetermined intervals on the overhead wire W from the steel tower supporting the overhead wire W to the adjacent steel tower, fixing the snow-resistant rings R to the overhead wire W one after another.

During the installation work, as shown in Figure 11A (1), when the aerial vehicle 101 reaches the damper D, it stops, and a worker on the aerial vehicle 101 removes the damper D, which is an obstacle to travel, from the overhead wire W and stores it (Figure 11A (2)). After that, it moves forward while passing through the damper installation position while performing the installation operation of the snow-resistant ring R (Figure 11A (3)). The aerial vehicle 101 passes the damper installation position, and the worker performs the installation operation of the snow-resistant ring R at a position where the worker can reinstall the damper D on the aerial vehicle 101, for example, a predetermined position where the installation device 1 is positioned above the damper installation position (Figure 11B (4)). In this case, the worker opens the fasteners 10 and 14 to open the gap between the running body frame 5 and the main frame 8 and between the roller frame 13 and the main frame 8, and rotates the mounting device 1 around the vertical axis 7a of the connecting member 6 to the required retreat position, thereby opening the re-attachment position of the damper D on the overhead wire W (Figure 11B (5)). This makes it possible to re-attach the damper D.

Once the work of reinstalling the damper D is complete, return the installation device 1 to the working position along the overhead line W (Figure 11B (6)) in a position where the damper D does not interfere, place the running roller 4 and rear support roller 12 on the overhead line W, close the fasteners 10 and 14, and continue installing the snow-resistant rings R in sequence until the work reaches other adjacent towers.

In this way, the installation of all snow-resistant rings R (for example, for a span of 100 m, approximately 167 rings at 0.6 m installation intervals) can be completed by simply running once along one span of the overhead line W.

1 Mounting device 2 Running body 3 Main body 4 Running roller 5 Running body frame 5a Top plate 5b Side plate 5c Side plate 6 Connection member 7 Hinge member 7a Vertical shaft 7b Blade plate 8 Main body frame 8a Side plate 8b Side plate 8c Loading opening 9 Mounting mechanism 10 Fastener 11 Hinge 12 Rear support roller 13 Roller frame 13a Bearing plate 13b Bearing plate 14 Fastener 15 Hinge 16 Lower roller 17 Ring supply mechanism 18 Crimping mechanism 19 Guide member 20 Ring slider 21 Stopper 22 Wire 23 Constant force spring 24 Crimping claw 25 Link mechanism 26 Operation lever 27 Handle 28 Lever lock mechanism 29 Travel detection mechanism 30 Lever rotation shaft 31 Stopper mechanism 32 Roller rotation shaft 33 Drive lever 34 Lock lever 35 Passive sprocket 36 Driving sprocket 37 Chain 38 Wire 101 Aerial vehicle D Damper R Snow-resistant ring W Overhead wire

Claims (3)

A snow-resistant ring installation device that allows an operator on an aerial vehicle to continuously install snow-resistant rings on an overhead line on which a damper that impedes the running of the aerial vehicle is installed, while moving and removing the damper,
The vehicle is connected to the rear of the vehicle opposite to the direction of travel of the vehicle so as to be freely rotated horizontally around a vertical axis, and is configured to be able to rotate around a predetermined angle around the vertical axis between a working position where the snow-resistant ring can be attached to the overhead line and a retreat position off the overhead line that does not interfere with the damper reattachment work;
A snow-resistant ring installation device for overhead wires, characterized in that it is configured so that an operator on the preceding aerial vehicle can perform the work of reattaching the damper to the rear overhead wire while positioned in the evacuation position. 2. The snow-resistant ring mounting device according to claim 1, further comprising a running body that runs on the overhead line, and a main body that is supported on a lower portion of the running body,
The running body includes a running body frame supporting a running means, and a connecting member connecting one end side of the running body frame to the rear end side of the aerial vehicle so as to be freely rotatable around a vertical axis;
The main body includes a main body frame connected to a lower portion of the traveling body frame, and an attachment mechanism assembled on the main body frame,
the main frame is connected to a lower edge of the running body frame so as to be relatively rotatable about a horizontal axis, and is provided so as to be movable between a closed position in which the main frame engages with the running body frame while receiving the overhead wire between the main frame and the running body frame, and an open position in which the main frame disengages to release the overhead wire;
The installation mechanism is characterized by comprising a ring supply mechanism that sequentially sends the snow-resistant rings with their engagement portions open to a predetermined installation waiting position immediately adjacent to the overhead wire, and a crimping mechanism that can be operated by the worker to close the engagement portion of the snow-resistant ring arranged at the installation waiting position to grip the overhead wire. A method for continuously installing snow-resistant rings on an overhead wire on which a damper that impedes the running of the aerial vehicle is installed, by a worker on the aerial vehicle using the snow-resistant ring installation device described in claim 1 to install and detach the damper while moving, the method comprising the steps of:
A first step of connecting the snow-resistant ring mounting device to the rear of the aerial vehicle attached to the overhead wire;
A second step of mounting the snow-resistant ring attachment device on the overhead wire so that the device can run on the overhead wire;
A third step in which an operator on the aerial vehicle operates the aerial vehicle to move intermittently on the overhead wire, and operates the snow-resistant ring attachment device at predetermined movement intervals to attach the snow-resistant ring to the overhead wire;
A fourth step in which, when the aerial vehicle reaches a position immediately behind the damper, an operator aboard the aerial vehicle removes the damper from the overhead line and stores it;
Following the fourth step, a fifth step is performed in which an operator riding on the aerial vehicle operates the aerial vehicle to pass the aerial vehicle through a mounting position of the damper on the overhead line;
A sixth step of rotating the snow-resistant ring mounting device, which is located at the working position above the damper mounting position, to the retreat position after the aerial vehicle has passed the damper mounting position on the overhead line, to open the damper mounting position on the overhead line;
A seventh step following the sixth step is to reinstall the damper that has been stored in the installation position of the damper on the released overhead line;
Following the seventh step, an eighth step of rotating the snow-resistant ring mounting device from the retreated position to the working position on the overhead wire;
A method for attaching a snow-resistant ring, comprising: a ninth step of performing the third step again following the eighth step to attach the snow-resistant ring to a predetermined position on the overhead wire.

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