JPH0568164B2 - - Google Patents

Description

[Detailed Description of the Invention] <Field of Application of the Invention> The present invention relates to a safe used for overhead line work, in particular, since the joint part does not substantially apply a load to the wheel, it does not give resistance to the joint part, and This invention relates to a joint transfer type safe that can be passed through without being subjected to bending loads that may cause damage.

In this specification, the term "electric wire" includes not only the original electric wire but also connection or traction wires. Furthermore, the term "joint part" refers to a part to which electric wires are connected, and includes both cases where a joint protector is attached and cases where a joint protector is not attached.

<Conventional technology> Conventionally, safes similar to this type include:
Jitsukō No. 53-34554, Special Kokō Sho 55-20447, Jitsukōaki
No. 53-47592, Publication No. 59-15204, Japanese Unexamined Patent Publication No. 1973-
28695, Utility Model Application Publication No. 54-150995, etc. are known.

<Problem to be solved by the invention> All of these methods require the safe to be tilted or deformed in order to pass through the joint part.
No. 55-20447 is an external drive type in which a drive source is installed outside the safe body to tilt the safe.
Others utilize intrusion resistance, which utilizes the intrusion resistance of the joint to operate the safe.

However, with the external drive type, it takes a considerable amount of time to operate when the included angle is large.
There are cases where the operation cannot follow the passage of the joint part, and since the operation means are outside the safe itself, it is difficult to avoid making the device complicated and large.
In addition, the fact that the operating means are outside the safe itself and the device is complicated and large makes the installation work more complicated.
There are problems such as...

On the other hand, in the case of a type that utilizes intrusion resistance, the resistance required to operate the safe will naturally be applied to the joint, which will cause instability in the tension of the wire and prevent the safe from returning to its original position if it is tilted. There are problems such as it may not go well and a joint protector is indispensable at the joint part.

Here, eliminating the need to use a joint protector has great significance in streamlining overhead line construction, as its procurement, installation and removal work, etc. are very important. Facilitating the passage of joints is of sufficient significance only when the joint protector is finally made unnecessary.

<Means and operations for solving the problem> In order to solve the above problem, the present invention is similar to the conventional one in that the safe is operated when passing through the joint part, but takes it one step further. When operating the safe, the joint part passes through the safe without substantially applying a load to the wheel, and in particular, the operating means of the safe can be operated with a small driving force so that it can be miniaturized, and it is also easy to follow. In order to improve performance, the operation time is shortened.

Specifically, two or more wheels that are connected in the direction in which the electric wires travel are integrally held by a frame body, and the connection points of the wheels with the hanging tools for hanging them from the steel tower are connected. For this purpose, a pair of cylinder bodies having hooks for hooking on rods that move forward and backward are attached to the frame body in a pair facing each other, and the movement of each cylinder body is The hook is separably hooked onto the pin rod at the connection point with the hanging tool, and the connection point is forcibly moved in one direction with one cylinder body and in the other direction with the other cylinder body. That's what I do.

With this structure, when the joint section enters the safe, the wheel on the front side in the direction of travel is lower than the wheel on the destination side in the direction of travel, so that the wheel on the front side in the direction of travel does not receive the load of the joint section. By making the wheel on the forward side in the traveling direction lower than the wheel on the near side in the traveling direction in a state where the joint section is placed between both wheels, the wheel on the forward side in the traveling direction does not receive the load of the joint section. This is to prevent the wheel from receiving substantially any load from the joint portion, and the operability that makes such a mechanism effectively possible is realized as follows.

That is, at the initial stage when the joint part enters, the connection point is moved in one of the cylinder bodies, but if this movement changes the balance of the suspended state and the frame body tilts beyond a certain level, Since the relationship between the hooking claw on each cylinder body and the pin rod at the connection point can be separated, the connection point will naturally move quickly to the required range and create the required tilted state. As a result, only a small amount of driving force is required, and excellent operability is realized in which the joint part can follow the entry and passage of the joint part.

According to such a joint transfer type safe,
The joint can pass through the safe with almost no resistance, and therefore the joint protector can be eliminated, greatly contributing to rationalization of overhead line construction.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. In the following description, parts common to each embodiment will be denoted by the same reference numerals, and redundant description will be omitted.

First embodiment (Figs. 1 to 4) This safe 1 has two wheels 2 and 3 connected to electric wires W.
are arranged in series in the traveling direction (direction of arrow X) and held by a frame body 4, and are used by being suspended from a steel tower T by a hanging device 5.

The hanging tool 5 is connected to the frame body 4 by a pin connection at a connection point P, and this connection point (suspension fulcrum) P is movable in the direction in which the wheels 2 and 3 are connected.

Specifically, a long hole 6 is provided in the frame body 4, and a pin rod 7 at the tip of the hanging tool 5 is slidably engaged with the long hole 6 as a connection point (hanging fulcrum) P. A pair of cylinder bodies 8 and 9 are attached to the frame body 4 in a facing state, and hooking claws 8c and 9c are provided on rods 8d and 9d of each cylinder body 8 and 9, respectively.

That is, when the rod 8d of the cylinder body 8 is driven, the pin rod 7 is pulled by the hooking pawl 8c.
moves in the direction of arrow Y, and the rod 9 of the cylinder body 9
When d is driven, the pin rod 7 is moved in the Z direction by the hook 9c. At this time, for example, when the cylinder body 8 is driven and the hooking pawl 8c forcibly pulls the pin rod 7, the cylinder body 9 is in a free state,
The hooking pawl 9c may be made to move freely as the pin rod 7 moves, or by using an automatic return type cylinder body, the hooking pawl of the cylinder body that is not involved in the drive can be attached to the pin rod 7. It may be possible to return to a state where it does not come in contact with.

Here, numeral 10 in the figure is a stopper, which has the role of limiting the movement of the pin rod 7.
Since the movement limit of the pin rod 7 differs depending on the included angle at the place where it is used, the mounting position can be adjusted.

As can be seen from this, the maximum stroke of each of the cylinder bodies 8 and 9 is required to be approximately half the length of the frame body 4, specifically, the elongated hole 6.

The cylinder bodies 8 and 9 can be hydraulically, pneumatically, or electrically powered, but the drive source for these pumps (not shown) is the wheel 2, which rotates as the electric wire W passes through. It is more preferable to use the rotational force of No. 3. Moreover, as a power source when using an electric cylinder body, it is also possible to operate a generator in the same way as a pump and use the electric power via a battery.

Initially, the movement of the pin rod 7 must be performed by an external force, that is, the cylinder bodies 8 and 9, but due to changes in the balance of the suspended state, that is, the load balance on both sides of the connection point P, the frame body is forced to move beyond a certain level. Once the tilt occurs, the rest can happen naturally. This phenomenon is caused by the hooking claw 8c, as described above.
By hooking and pulling the pin rod 7 by the pin 9c, this can be made easier and its operability can be improved.

In addition, in this safe 1, a sensor 11 for determining the difference in diameter between the joint J and the electric wire W is provided in the frame body 7, and this sensor 11 detects that the joint J enters between the wheels 2 and 3. That's what I do.

If the pin rod 7 serving as the connection point P is moved by driving the cylinder bodies 8 and 9 in response to the approach and passage of the joint portion J, the safe 1 can be adjusted to a suspended state as described above. The balance, that is, the load balance on both sides of the connection point P changes, and a Yajirobe-like movement occurs in the frame body 7, resulting in a change to the state necessary for passage of the joint portion J.

Specifically, when breaking into the safe 1 at the joint part J, the wheel 2 on the near side in the direction of movement is lowered than the wheel 3 on the forward side in the direction of movement. A state in which no load is applied, specifically a state in which there is light contact [Fig. 4a]. In this state,
Although the joint portion J is in contact with the wheel 2, it does not actually pass through the wheel 2.
In other words, the wheel 2 does not provide any resistance.

Next, when the sensor 11 detects that the joint part J has entered between the wheels 2 and 3, that is, the joint part J is not hanging over any of the wheels [Fig. 4b], the progress is made. The wheel 3 on the forward side in the direction of travel is made to be lower than the wheel 2 on the front side in the direction of travel so that the wheel 3 on the forward side in the travel direction is similar to the wheel 2 on the front side in the direction of travel [FIG. 4c].

Then, when the joint part J is separated from the wheel 3 [Fig. 4 d], Fig. 4 e
As shown in the figure, the wheel 2 on the near side in the direction of travel is made lower than the wheel 3 on the forward side in the direction of travel in preparation for the approach of the next joint portion J. Incidentally, the state in which the joint part J is separated from the wheel 3 may be detected by the time elapsed after the joint part J passes the sensor 11, or may be detected by a separately provided sensor.

In this way, the joint J can be attached to the safe 1 without putting any substantial load on either wheel.
pass through. In other words, when looking at each wheel 2 and 3, the joint part J does not pass through,
They will be "transferred" and will not encounter any resistance. Therefore, according to this safe 1, the joint protector of the joint portion J, which was conventionally required, can be eliminated, and the wire extension work can be further streamlined.

Second Embodiment (Fig. 5) A feature of the safe 20 of this embodiment is that a valve body 21 is used to detect the joint J, whereas the previous embodiment uses the sensor 11 to detect the joint J. .

That is, the valve body 21 is a "manual valve" that controls the drive of each cylinder body 8, 9, and this valve body 21
The cylinder bodies 8 and 9 are caused to move as described above by being actuated by the joint portion J that has entered the cylinder body.

In this way, the valve body 21, which is a "manual valve", is operated at the joint J, and as described above, the drive source for the pump for the cylinder bodies 8 and 9 is determined from the rotational force of the wheels 2 and 3. By doing so, there is no need to supply any energy from the outside, so the overall structure can be made very compact.

<Effects of the Invention> As explained above, the joint transfer type safe according to the present invention has a structure in which each hook of the pair of cylinder bodies is separably hooked to the connection point with the hanger. Since the connection point is forcibly moved, the tilting motion for transporting the joint can be performed with a small amount of driving force, and with quick and excellent followability. It is possible to almost eliminate resistance during passage. Therefore, by using this, the joint protector can be abolished and the overhead line work can be significantly streamlined.

[Brief explanation of the drawing]

1 is a schematic side view of a safe according to the first embodiment, FIG. 2 is a schematic sectional view taken along the arrow line in FIG. 1, and FIG. 3 is a schematic side view of the safe in the first embodiment. FIGS. 4a to 4e are schematic side views of the sensor as viewed from the outside, and FIG. 5 is a schematic side view showing the usage state of the safe according to the first embodiment, and FIG. FIG. 1... Safe, 2, 3... Wheel, 4... Frame body, 5... Hanging tool, 8, 9... Cylinder body, 1
1...Sensor, 21...Valve body, P...Connection point.

Claims (1)

[Scope of Claims] 1 A frame body integrally holds two or more wheels connected in the direction of propagation of electric wires, and the connecting point of the wheels is connected to a hanging tool for hanging from a steel tower. A joint part transfer type safe that can be forcibly moved in the installation direction, in which a pair of cylinder bodies each having a hook for hooking on a rod that moves forward and backward is attached to a frame body in a pair of facing directions. , the hook of each cylinder body is separably hooked onto the pin rod at the connection point with the hanging tool, and the connection point is moved in one direction with one cylinder body and in the other cylinder body. A joint part transfer type safe characterized in that the joint part is forcibly moved in the other direction. 2. The joint according to claim 1, wherein a sensor is provided on the frame body to determine the difference in diameter between the joint part and the electric wire, and the sensor detects that the joint part has entered between the wheels. Portable safe. 3. The joint part transfer type safe according to claim 1, wherein the operation of the pair of cylinder bodies is controlled by a valve body actuated by the joint part that has entered between both wheels.