JPH0447536B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Application of the Invention> The present invention relates to a metal wheel that can be passed through a protector used at a connecting portion of an electric wire being extended with low resistance.

<Conventional technology> Conventionally, this type of technology
The one shown in the above publication is known.

<Problems to be solved by the invention> Although this conventional device reduces the included angle to a certain extent to reduce the resistance to passing through the metal wheel due to the rigidity of the protector, there is still a considerable included angle. However, in cases where the protector's entry timing or balance is poor, it is not necessarily sufficient, and further improvements have been desired.

<Means for Solving the Problems> Therefore, in the present invention, two wheels are arranged in series in the direction of movement of the electric wire, and when passing the protector, the wheel on the front side in the direction of movement of the electric wire is moved to the front side in the direction of movement. After the protector passes the wheel on the front side in the direction of travel, the wheel on the front side in the direction of travel is positioned lower than the wheel on the front side in the direction of travel. When the protector enters, the included angle is approximately 0 to reduce the passing resistance.For this purpose, the metal wheel according to the present invention has a frame body having hanging sides and mounting sides that are parallel to each other. One wheel is attached to each apex of the mounting side, and a long slot-like hole is formed on the hanging side, and the engaging part of the hanging tool is movably and rotatably engaged with this long hole. At the same time, the actuating part of the actuating means fixed to the hanging side is connected to the hanging tool, and the engaging part of the hanging tool to the elongated hole is forcibly moved back and forth within the elongated hole. There is.

With such a structure, the hanging fulcrum can be moved within the range of the structure provided in the frame body to reduce resistance to passing the metal wheel.
As seen in Publication No. 34554, the structure is simpler than the structure in which a hoist-like operating means is installed on the steel tower to move the suspension support, and the installation on the tower can be done using a conventional metal wheel. It can be done almost unchanged, and the installation work can be made easier.

<Example> Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

The metal wheel 10 according to this description includes a quadrilateral frame body 12 having hanging sides 12a and mounting sides 12b that are parallel to each other.
One wheel 11 is attached to each vertex of the attachment side 12b of 2.

Further, a long hole 14 in the shape of a long and narrow groove is formed in the hanging side 12a of the frame body 12, and the engaging portion of the hanging tool 13 is inserted into this long hole 14 in the direction in which the wheels 11, 11 are connected (as shown by the arrow B). direction) and move in the direction of arrow C.
They are engaged so as to be rotatable as shown in FIG.

Further, a cylinder means 15 is fixed to the hanging side 12a as an actuating means by a pin connection, and the actuating part, that is, the rod thereof is connected to the hanging tool 13 in close proximity to the engaging part. The cylinder means 15 may be either hydraulic or pneumatic. Moreover, it is also possible to use electric actuating means instead of the cylinder means 15.

Such a metal wheel 10 is used by being suspended from the steel tower 6 via the hanging tool 13 with the hanging cord 16, but when the protector 5 approaches or passes, the hanging tool 13
The engaging part to the elongated hole 14 is moved within the elongated hole 14 by the cylinder means 15 (actually, the frame body 12 is moved relative to the hanging tool 13 connected to the hanging cord 16), and the hanging fulcrum is P can be moved in the direction in which the wheels 11 are connected.

As a result, the balance of the hanging state changes, and the wheel 11 on the front side in the direction of travel of the electric wire 2 can be positioned lower than the wheel 11 on the forward side in the direction of travel before the protector 5 enters (Fig. 1). After the protector 5 passes the wheel 11 on the front side in the traveling direction, conversely, the wheel 11 on the forward side in the traveling direction
can be positioned lower than the wheel 11 on the near side in the direction of travel (Fig. 2).

As a result, in any case, an inclination corresponding to the included angle α that occurred in the case of the conventional one is formed by the successively arranged wheels 11, 11, and the protector 5 to each wheel 11 is
The "closing angle" when the protector 5 enters can be made approximately zero, and the resistance to passing the metal wheel caused by the rigidity of the protector 5 can be almost eliminated.

<Effects of the Invention> As explained above, the metal wheel according to the present invention can effectively reduce the resistance to passing the metal wheel by moving the hanging fulcrum, and can effectively reduce the resistance to passing the metal wheel by moving the hanging fulcrum to reduce the resistance to passing the metal wheel. This can be done within the scope of the structure provided in the frame body, so a simpler structure is required, and it is also easy to attach to the steel tower, greatly contributing to rationalization of wire extension work.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing a state in which a protector is entering the metal wheel according to the present invention, and FIG. 2 is a schematic side view showing a state in which the metal wheel of FIG. 1 has finished passing through the protector. DESCRIPTION OF SYMBOLS 10... Metal car body, 2... Electric wire, 5... Protector, 6... Steel tower, 11... Wheel, 12... Frame body, 12a... Hanging side, 12b... Mounting side, 13... Hanging tool , 14...Long hole, 15...Cylinder means (actuation means), A...Advancing direction, B...
...Connection direction, P...Hanging fulcrum.

Claims (1)

[Scope of Claims] 1. A low-resistance passing type metal protector in which two wheels are connected in series in the direction in which electric wires travel, and the suspension fulcrum to the steel tower is movable in the direction in which the wheels are connected. The vehicle has a hanging side and a mounting side that are parallel to each other, and one wheel is attached to each apex of the mounting side of the frame body, and an elongated slot-like hole is formed in the hanging side. The engaging part of the hanging tool is movably and rotatably engaged with the elongated hole, and the operating part of the actuating means fixed to the hanging side is connected to the hanging tool. A low-resistance pass-through type metal wheel for a protector, characterized in that an engaging portion of the protector is forcibly moved back and forth within an elongated hole.