JP7068129B2 - Shoe chain type overhead wire machine using a sliding plate - Google Patents

Description

The present invention relates to an electric wire feeding machine or an electric wire winding machine used for electric wire erection work of an overhead power transmission line and electric wire removal work.

The conventional shoe chain type wire drawing car has been developed, improved and used with a focus on how to use the brake to feed the electric wire, that is, to surely perform the wire drawing.
In recent years, wire-drawing vehicles that can also be wound have become widespread from the viewpoint of ease of wire-drawing work and efficient use of machinery.

In the shoe chain type wire drawing wheel, the shoe chain to which a large number of shoes are connected winds around the shoe chain drum while supporting the electric wire, and the shoe that receives the tensile force of the electric wire is caught by the key, which synchronizes with the rotation of the drum. However, by applying a brake to the rotation of the drum, the tensile force of the electric wire to be unwound is maintained.

The load received from the electric wire by the shoe chain type wire drawing wheel is received by the surface of the shoe chain drum and a straight rod-shaped member called a key arranged on the surface of the shoe chain drum in parallel with the shoe chain drum shaft via the shoe. ing.
That is, the shoe chain drum surface mainly receives the load in the shoe chain drum normal direction, and the key mainly receives the load in the shoe chain drum tangential direction.
In the shoe chain type wire drawing car, the shoe chain type wire drawing car frame and the branch line foundation laid behind the shoe chain type wire drawing car are connected by a wire rope to obtain a reaction force against the tensile force from the electric wire. ing.

The shoe is connected as a shoe chain, wrapped around the shoe chain drum, and then rotates according to the rotation of the shoe chain drum. Creates enough space to fit.
The shoe rotates with the shoe chain drum the number of turns corresponding to the required frictional force with the electric wire, then separates from the shoe chain drum and returns to the initial position.

The lateral movement of the shoe is a component that generates a reaction force for lateral movement while receiving resistance due to friction between the shoe and the surface of the shoe chain drum and friction between the shoe and the key, that is, a shoe feed device having a predetermined width. It is a mechanism to move laterally. Since the resistance due to friction between the shoe and the shoe chain drum is proportional to the tension of the electric wire, the lateral load applied to the shoe feed device at the time of winding where lateral movement occurs on the high tension side is extremely large, and the shoe feed device is damaged. Was causing trouble.

In addition, the surface of the shoe chain drum is made closer to a perfect circle with respect to the shoe chain drum shaft so that friction when the bottom surface of the shoe moves in contact with it can be reduced, and the surface is finely finished and lubricated. , There were problems such as surface roughness due to sand biting and uneven wear of the shoe bottom.

The present invention provides a method for reducing friction between a shoe and a shoe chain drum by using a material having a low coefficient of friction used for a slide bearing or the like and adopting a flat plate-shaped component as a slide plate.

Until now, the contact portion between the shoe and the shoe chain drum has generally been a method in which a lubricating oil such as grease is applied to the contact surface between the steel materials.
The present invention provides a method of forming the contact surface between a steel material and a flat plate using the low friction material, or a flat plate using the low friction material.

The frictional resistance between the shoe and the shoe chain drum of the shoe chain type wire drawing car has an important influence on the energy efficiency of the entire equipment and the design of each part, and was a design concern. Previously, a design in which a rotating body such as a bearing was inserted into the contact portion was also considered, but further studies have been desired from the viewpoint of its strength and cost.
Therefore, the configuration of the contact part made of a material that does not require lubricating oil was studied, and a method of attaching a flat plate using a low friction material was devised.
Various self-lubricating metals, resins, and composites thereof have been developed as low-friction materials, and flat plates with non-lubricating performance suitable for high loads and low-speed motion are selected.
The flat plate using the low friction material may be installed at all three places where the shoe and the shoe chain drum come into contact with each other and one key, or may be a part of them. Further, there may be two places where the shoe and the key come into contact with each other. Further, by devising the shape of the key or shoe, the contact point may be limited to only the key or shoe.
Further, a flat plate made of a low friction material may be attached by bolts, adhesion or the like, or may be adhered to or coated on the surface of the contact portion. Further, if the load capacity and cost allow, the shoe or key structure may be made of a low friction material.

When the frictional force between the shoe and the shoe chain drum is reduced, the reaction force of the shoe feed device is also extremely small, and a simple guide plate can control the lateral movement of the shoe chain. Therefore, the shoe feed device is simple and lightweight.

Further, in the past, it was indispensable to apply grease as a lubricating oil because of contact between steel materials, and it took a lot of cost and labor to regularly remove and clean the grease and reapply it, but that work becomes unnecessary.
On the other hand, it is necessary to replace the flat plate using a low friction material due to wear, but the frequency is extremely low. In addition, since grease is always present on the surface of the drum, sand particles flying by the wind are caught by the grease and caught between the shoe and the drum, resulting in abnormal wear of the contact surface, and the surface of the contact portion of the drum or shoe. However, by using the present invention, it is not necessary to adjust the flat surface, that is, to adjust the flat surface, which requires a high level of skill.

FIG. 1 shows, as an embodiment of the present invention, a state in which a flat plate using a low friction material is provided on a shoe chain drum and a key at a contact point between the shoe and the shoe chain drum according to claim 2. FIG. 2 shows, as an embodiment of the present invention, a state in which a flat plate using a low friction material is attached to a shoe at a contact point between a shoe and a key according to claim 2. FIG. 3 shows the relationship between the shoe and the electric wire, and the relationship between the shoe and the shoe chain drum and the key.

The contact portion between the shoe 13 and the shoe chain drum 10 is a portion where the bottom surface of the shoe 13 and the surface of the shoe chain drum 10 supporting the shoe 13 are in contact with each other, and a key 11 for transmitting the rotational force of the shoe 13 and the shoe chain drum 10 to the shoe 13. There is a part that touches.
The present invention provides a structure in which all of these contact portions are in contact with a sliding plate 12 using a low friction material.

The sliding plate 12 is attached to either side of the portion where the shoe 13, the shoe chain drum 10 or the key 11 is in contact with each other by bolts or adhesives, and by arranging them in a composite manner, friction between the shoe 13 and the shoe chain drum 10 is generated. It can be reduced.
FIG. 1 shows a schematic diagram in which a shoe chain drum 10 and a key 11 are equipped with a sliding plate 12.

Further, for example, only the contact portion with the key 11 is made contact with the sliding plate 12, not all the contact portions, and the surface of the shoe chain drum 10 is left as it is, or conversely, the contact with the surface of the shoe chain drum 10 is maintained. It is conceivable that only the portion is brought into contact with the sliding plate 12 and the contact portion with the key 11 is left as it is, and even with this, the frictional force is considerably reduced.

At least one sliding plate 12 needs to be provided at a position where the frictional force due to the tangential force or the frictional force due to the normal force can be reduced.

1 Electric wire 10 Shoe chain drum 11 Key 12 Sliding plate 13 Shoe

Claims (3)

A shoe chain in which multiple shoes that receive and support a striatum such as an electric wire are connected, a cylindrical shoe chain drum for winding and rotating the shoe chain, and a wire such as an electric wire attached to the surface of the shoe chain drum. In a shoe chain type overhead wire machine that feeds or winds a striatum such as a shoe chain type electric wire having a straight bar-shaped key for transmitting the rotational force of the shoe chain drum that resists the tension of the strip to the shoe. ,
A shoe chain type overhead wire machine characterized in that a slip plate having self-lubricating property is arranged in all or a part of a contact portion between the shoe and the shoe chain drum and a contact portion between the shoe and the key. .. The shoe according to claim 1 , wherein the sliding plate is arranged at the contact portion between the shoe and the shoe chain drum and the contact portion between the shoe and the key in the normal direction of the shoe chain drum. Chain type overhead wire machine. The shoe chain type overhead wire machine according to claim 1, wherein the sliding plate is arranged at the contact portion between the shoe and the key in the normal direction of the shoe chain drum.

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