JPH079896A - Trolley wire of pi form rigid body - Google Patents

Abstract

PURPOSE:To increase the strength of a rigid body trolley wire against bending stress, expand an interval between both support points and simplify a fitting work without any need of welding. CONSTITUTION:A body 1 is constituted of an upper side 1a, two leg sides 1b and two ear-form sides 1c. Both leg sides 1b having a flexible thin wall section at the center of the upper side 1a are formed to be expanded externally for allowing the insertion and subsequent tightening of a trolley wire T with a bolt 5. At the joint of both bodies 1, a joint plate 4 is laid in contact with the leg sides 1b ranging over both bodies 1. The joint plate 4 has an waveform projection at the contact surface thereof, and is fixed to each corresponding leg side with a bolt 5. Separately, the joint plate 4 and a trolley wire may be fastened to a body unit of certain length, and a trolley wire unit may be fabricated at a workshop. In this case, each unit is only required to be jointed at a construction site.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a rigid electric power line, which greatly simplifies on-site installation work.

[0002]

2. Description of the Related Art As shown in FIG. 8, a conventional rigid train line has a body M consisting of an upper side and a single leg side, a trolley wire T arranged at the lower end of the leg side, and an ear E applied to both sides of the leg side. The trolley wire T was bolted. The length of the ear E is 50 to 100 cm.
This structure had the following problems. First, the ear is divided into two, increasing the number of parts. It is not easy to attach a pair of ears when working at height. Second, since the ear is divided and the mounting is intermittent along the longitudinal direction of the main body, the current-carrying capacity is correspondingly limited. Thirdly, since the train line is supported only by the main body of a single leg, the rigidity for maintaining straightness is insufficient, and when the distance between both fulcrums becomes long, downward bending is inevitable and it cannot be connected to the panta. Make contact less smooth. In order to avoid this, the distance between both fulcrums is limited to 5m by rule,
The number of supporting devices H (FIG. 7) to be attached also increases. Fourthly, the end connection of the main body is welded in order to secure a current-carrying capacity, but since it is a work at a high place in the side road, it is difficult to carry on the equipment and work. In particular, it is extremely difficult to align the lower surface of the main body with a smooth line by welding due to thermal strain, and it is easy to become a hard spot on a train line.

[0003]

SOLUTION: A body M, which is a conventional single leg, has a π shape having both legs, and the lower ends of both legs are formed into a pair of opposing ears. The center of the upper side of the main body should be thin and flexible, and the legs should be bent outwards. All you have to do is to insert the trolley wire between the two ears and tighten the bolts for on-site work. At the next part of the main body, the strip-shaped joint plate is straddled over both main bodies and fixed to the leg side with an attachment bolt. This seam plate has two purposes: to secure the strength corresponding to the bending stress at the seam and to ensure the electric conductivity comparable to that of welding. For the former, the seam plate shall extend symmetrically from the seam to an appropriate length and fit tightly between the lower surface of the main body and the upper surface of the ear side. For the latter, it is assumed that a covered projection is provided on the contact surface with the leg side of the main body. By the above, welding work is abolished.

[0004]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is divided into two, A and B, according to the difference in the embodiments, and each of them will be described with reference to the drawings. A. When installing the main body of the rigid train wire and the trolley wire separately. First, the main body is installed on the ceiling, and the seam plate is installed on the main body joint. Then, the trolley wire is inserted and fixed one after another from one end. B. When a unit that incorporates the main body, trolley wire, and joint plate into one unit is prepared in advance at the factory, and the units that have been carried in are connected to each other at the work site. In the case of mode A In FIG. 1, the aluminum main body 1 has two leg sides 1b hung from an upper side 1a, and the lower end thereof is formed as an opposed ear side 1c. Both leg sides 1b are preformed so that the trolley wire T can be pushed into the space between the ear sides 1c so as to open outward. Further, a thin portion is provided at the center of the upper side 1a so as to have flexibility.
The trolley wire T is gripped by the ear 1c with the bolts 2 inserted through the lower portions of both legs. Sufficient gripping force can be obtained on both legs by bolting near the ear side away from the thin portion (fulcrum). Moreover, since both legs are biased to open outward, the bolt is prevented from loosening. Both sides of the body 1 are preformed so as to open outward.

The joint structure of the case A will be described with reference to FIGS. Seam plates 3 and 4 (Fig. 4) are used for the seam. The seam plates 3 and 4 are strip-shaped, and have a width that fits in a rectangular space between the upper and lower surfaces of the main body 1 and the upper surface of the ear side, and have an appropriate length symmetrical about the seam center and sandwich the leg side 1b. , Bolt 5 is tightened. The joint plate 3 has bolt holes, and the joint plate 4 has screw holes. As shown in FIG. 4, it is preferable that the joint plates 3 and 4 are provided with inclined surfaces 3a (4a) on the lower side and the left and right ends on the upper side. This inclined surface is convenient for insertion into the above space, and when it is inserted into the main body 1, the bottom face of the main surface is
It strongly abuts the upper surface of the lower side to increase the rigidity of the seam, prevents downward bending of the seam, and prevents a step from occurring at the seam of the trolley wire. In addition, the inner joint plates 4, 4
The thickness should be such that the trolley wire is not hindered when both legs are tightened with bolts 2. The seam board is also shown in Figure 4.
As shown in FIG. 5, a longitudinal corrugated projection is provided on the contact surface with the leg side. Even if two flat surfaces are brought into contact with each other, the number of contact points that are effective for energization is small, but if a corrugated projection is provided and tightened with a bolt, the top of the projection will be deformed, ensuring an effective contact surface. . A moat-proof compound is sufficiently applied to the wavy projection surface so that an excessive amount of application is caused to overflow from both ends through the corrugated groove portion by tightening bolts. The length of the main body 1 is about 10 m, and the length of the joint plate 3 (4) is about 20 cm. After the main body is connected with a seam plate to a length of 200 to 300 m, a drum-wound trolley wire is inserted one after another from the end, and the bolt 2 is tightened to complete the construction. Case of Mode B A case of preparing a train line unit in advance will be described with reference to FIG.
The body 1 has the same cross section as that of FIG. 1, but has a constant length for the convenience of transportation and assembly. Similarly, the joint plate 3 (4) is inserted between the upper side and the ear side, and half of its length is projected to the outside of the main body, and is fixed to each corresponding leg side by bolts 5. The trolley wire T is also a unit having substantially the same length as the main body, but the insertion position is shifted, and the end portion is positioned within the protruding length of the joint plate. This is to protect the trolley wire from being damaged or curved during transportation, and to use the joint plate as a guide plate to butt-connect each trolley wire on the same axis. In this state, the bolt 2 is tightened and the trolley wire is integrated with the main body to form an electric line unit. At the site, fit the following unit to this, and fix the joint plate protrusion with bolt 3
Tighten with (4) to connect. At that time, the seams of the trolley wire T are overlapped with each other by providing alternate cuts in advance as shown in FIG. 6 in order to ensure electrical connection. Therefore, the trolley wire unit is made longer than the main body unit by the above-mentioned cut length.

[0006]

[Effect] Since the main body has the π shape of both legs and the ear sides are integrally continuous, the strength of the main body against bending stress is increased, and the distance between both fulcrums can be greatly extended from the current 5 m. Doubling is also possible. Further, since the trolley wire can be gripped only by tightening both legs, the work at the site is remarkably simplified. Introducing a seam plate at the seam ensures strength against bending stress at the seam and does not cause a step at the seam. Therefore, there is no danger of becoming a hard spot on the train line. In addition, the provision of wavy projections on the seam plate also acts to ensure reliable energization, thus eliminating welding work. In the case of the train line B as a unit, the units previously assembled in the factory are simply connected on site, and the assembling is further simplified, and the same effects as described above are obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a power line main body of the present invention.

FIG. 2 is a sectional view of the joint portion.

FIG. 3 is a front view of the joint portion.

FIG. 4 is a perspective view of a joint plate.

FIG. 5 is a front view of a power line unit.

FIG. 6 is a plan view showing a trolley wire connection portion of the unit.

FIG. 7 is a side view of the suspension device.

FIG. 8 is a side view of a conventional train line.

[Explanation of symbols]

 1 Main body 2 Bolt 3,4 Seam plate 5 Bolt 6 pin

Claims (4)

[Claims] 1. An aluminum π in which a pair of leg sides are opened from the upper side and hang down freely, a pair of ear sides is provided at the lower end thereof so that a trolley wire can be held, and a flexible thin portion is formed at the center of the upper side. A π-type rigid electric power line consisting of a main body and a tightening bolt that passes through the leg side near the ear side. 2. The rigid train line according to claim 1, further comprising an aluminum strip-shaped joint plate that can be fitted between the upper side and the ear side.
A seam structure that is inserted symmetrically to the center of the seam of the main body and bolted tightly to the corresponding leg sides. 3. The joint structure according to claim 2, wherein a longitudinal corrugation is provided on the leg contact surface of the joint plate, and a compound is applied. 4. A π-shaped main body unit made of aluminum having a fixed length in which a pair of leg sides are opened from the upper side and freely hung down, an opposite ear side is provided at the lower end thereof, and a flexible thin portion is formed at the center of the upper side. , The aluminum strip-shaped joint plate that is fitted between the upper side and the ear side so that it can contact the leg side, half of the length protrudes from the main body, and is bolted to the corresponding leg side, and the main body ear side is almost the same length as the main body A π-type combined electric line unit that is inserted into the main body and protrudes from the main body within the range that does not exceed the seam plate, and the end part can be connected to the adjacent trolley wire, and the trolley wire unit is bolted between both legs.