JPS5953766B2 - In-line two-wheeled gold wheel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-line two-wheel metal wheel used for guiding electric wires when extending them.

In the case of the one-wheeled metal wheel 1, if it is used in a place where the hugging angle α is large as shown in Fig. 1, when the protector 3 of the electric wire 2 [wire connection part protector] 3 and others climb over it, a large amount of damage will occur on the winch side A. Immediately after crossing over, various problems are inevitable, such as a strong impact being applied to the wheel wheel 1 and the electric wire 2, and the electric wire 2 starting to run at a dangerous speed (Fig. 2). I9).

As a solution to this problem, two-wheel metal wheels in series, for example, as shown in FIGS. 3 to 6, have been known.

That is, this in-line two-wheel metal wheel 4 has a support frame 9 on which wheels 7.8 are pivotally supported at both ends of an upper frame 6 having a hanging portion 5 in the center.
are rotatably connected and suspended, and the support frame 9 is connected by a connecting rod 10 to form a parallel four-bar link.

As a result, the included angle α of the electric wire 2 is determined.

, α1 (α.=α1) respectively as α′o. Not only can it be halved to α'1, but when the protector 3 approaches, the rotation of the suspension point 5 and the support frame 8 makes the included angle α substantially.

, α″1 can be made even smaller (Fig. 5).

However, such conventional two-wheel metal wheels in series have disadvantages in that they have a complicated structure, are expensive to manufacture, and have many moving parts, making them difficult to manage.

Regarding management, gold wheels are used outdoors, especially in the mountains or near the coast, where they are exposed to wind, snow, rain, etc.
Because it is used while being exposed to salt etc. for a long period of time,
The movable parts are prone to defects due to rust, mud, etc. Therefore, if there is a defect in even one part of the movable part, it will not function as intended, so conventional structures have had to be carefully managed.

Furthermore, it is heavy and inconvenient to handle, and when used in a place where there is a so-called horizontal angle β, there is also the problem that it tends to form a bending angle γ (Fig. 6).

This invention was made in view of these conventional problems, and while it basically has the same functions as the conventional one, it has a simple structure, is easy to handle, and is easy to maintain and manage. The purpose is to provide an in-line two-wheel metal wheel that hardly causes bending even when used in a certain place.

The details of this invention will be explained below based on the illustrated embodiments.

7 to 10 are diagrams showing a first embodiment of the present invention.

First, to explain the structure, this two-wheel metal wheel 11 has a triangular frame 12, 13, 14, wheels 17, 18 respectively arranged at apex parts 15, 16 that sandwich the frame 12 corresponding to the base of the triangle, and a rotatable hanging part 20 provided at the other apex part 19.

In principle, the triangle formed by the frames 12, 13, and 14 is an isosceles triangle, that is, the base angle θ1
．． Basically, the magnitude of θ2 is made equal.

Each frame 12. 13. The cross-sectional shape of 14 is not particularly limited.

The height h of the apex portion 19 on which the hanging portion 20 is provided is desirably kept as low as possible in view of strength and weight, while having enough margin to prevent the protector 3 from coming into contact with the apex portion 19 when the protector 3 passes.

That is, the lower the height h, the smoother the rotation 21, and the lighter the weight, the smaller the bending angle (γ') when there is a horizontal angle β (the effect will be described later).

Next, the effect will be explained.

Normally, the included angle is α relative to the one-wheeled gold wheel.

, α1 is reduced to 1/2 α'o, α'1 [Figure 9a].

When the protector 3 of the electric wire 2 enters, the entire frame rotates together with the wheels 17 and 18 in the hanging portion 20, and the substantial included angle is further reduced to α″0.α″1.

This rotation becomes larger as the passing resistance of the protector 3 increases, and the actual included angle α″ increases accordingly.

, α″1, which is reasonable.

As the protector 3 that has entered advances, rotations as shown in Figure 9, Figure 9, C and II are performed, allowing the protector 3 to move in and out smoothly.

In addition, since the height h from the suspension point 19 to the wire connecting the wheels 17 and 18 is small, the electric wire 2
Even when there is a horizontal angle β in the number of people, this series two-wheeled metal wheel 11
easily tilts in that direction, so almost no bending angle γ' occurs.

This is also an important effect compared to the conventional method [Fig. 10].

FIG. 11 shows a second embodiment of the invention.

In this embodiment, the base angle θ3 of the triangle formed by the frames 22, 23, and 24. θ4 is made to be slightly different, so that the position of the hanging portion 20 is removed by e from the perpendicular bisector of the frame 22, which corresponds to the bottom side.

When the protector 3 passes, the protector 3 passes over the input side wheel 25, between both wheels 25 and 26, and when it crosses the output side wheel 26, respectively. There is a peak tension ratio at which the tension difference on the exit side is maximum, but when the triangle formed by the frame 22, 23, 24 is an isosceles triangle, the wheel 2 on the entry side
The peak tension ratio is the largest when it exceeds 5.

As in this embodiment, the base angle θ3. These three peak tension ratios can be averaged by slightly changing the magnitude of θ4 and giving the eccentricity e.

When the included angle α approaches 100°, the effect of optimizing the eccentricity e becomes large.

The other configurations and operations are the same as those of the previous embodiment, so their explanation will be omitted.

FIG. 12 shows a third embodiment of the invention.

In this example, the diameter di of the wheel 27.28.

d2 is made different.

An important factor to consider when designing the wheel diameter is the contact pressure of the electric wire with the wheel.

Since the contact pressure is inversely proportional to the wheel diameter, both wheels 27
, 28 diameter d1. This is a different version of d2.

This embodiment is combined with the previous second embodiment.

FIG. 13 shows a fourth embodiment of the invention.

In this embodiment, guide wheels 30, 31 are arranged between the wheels 17, 18 along the frame 12 corresponding to the bottom side.

During wire extension work, a counterweight (not shown) is often installed to prevent the connection between the wire and the electric wire from rotating, but the presence of this guide wheel 30°31 It is possible to pass the counterweight smoothly and without difficulty.

In addition, since the guide wheels 30 and 31 do not directly receive the force from the electric wire during wire stretching, they are not required to have much higher strength than the wheels 17 and 18, and the structure of the bearing portions 32 and 33 may be simple. .

Other structures and functions are the same as in the first embodiment.

As explained above, according to this invention, the configuration is
The frame is formed in a triangular shape, and a wheel is placed at each of the two apexes sandwiching the frame corresponding to the base of the triangle, and a rotatable hanging part is provided at the other apex, which reduces the included angle by half. In addition, it maintains the same effect as before, which is that the actual included angle can be further reduced when the protector etc. enter, but the structure is simple and the manufacturing cost is low.
Since there is only one movable part, maintenance and management are easy.

In addition, since the weight can be reduced, the movement of the frame is smooth when the protector enters, and there is an advantage that the bending angle is small even when used in a place with a horizontal angle.

This means that unnecessary external forces such as impact and twisting are not applied to the wire, and in other words, it is possible to extend the wire without damaging the wire and without energy loss.

By making the base angles of the frames different or the diameters of the wheels different, it is possible to equalize the peak tension ratio between the input and output sides of the wires and the contact surface pressure of each wheel. This makes it easier for the counterweight to pass.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the electric wire suspension state of the one-wheel metal wheel, Figure 2 A5
The mouth is an explanatory diagram of when the protector passes through the single wheel metal wheel,
Fig. 3 is a front view of a conventional two-wheel metal wheel in series, Fig. 4 is a side view of the same, Fig. 5 is an explanatory diagram of its operation, and Fig. 6 is an explanatory diagram when used in a place with a horizontal angle. , FIG. 7 is a plan view showing the first embodiment of the present invention, FIG. 8 is a side view of the same, FIG. 9 is an explanatory diagram of its operation, and FIG. The explanatory drawings and FIGS. 11 to 13 are front views showing second to fourth embodiments of the present invention, respectively. 12.13,14,22,23,24...Frame, 12,22...Base equivalent frame, 15
゜16.19... Vertex site, 17. 18.
25. 26, 27. 28...Wheel,
20...hanging part, θ1. θ2. θ3. θ4...
...Base angle, dl, d2 ... Wheel diameter, 30, 31 ... Guide wheel.

Claims (1)

[Scope of Claims] 1. A frame is formed into a triangular shape, and wheels are arranged at two apex portions sandwiching a frame corresponding to the base of the triangle,
An in-line two-wheeled metal wheel characterized by having a freely rotatable hanging part at the other vertex. 2. The in-line two-wheeled metal wheel according to claim 1, wherein the triangles have base angles of different sizes. 3. An in-line two-wheel metal wheel according to claim 1 or 2, wherein the wheels have different diameters. 4. The in-line two-wheeled vehicle according to claims 1 to 3, wherein a guide wheel is arranged between the respective wheels along the frame corresponding to the bottom side.