JP2015131621A - Trolley wire suspending device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trolley wire suspending device that has a relatively simple structure, eliminates the need for frequent maintenance inspection and component replacement, stably exhibits damper function, facilitates manufacture, and can be obtained at low cost.SOLUTION: An end lid 5c of the other end of a casing 5 with one end connected to a messenger wire M is hermetically inserted in a rod section 7 in a freely coming in/out manner, and the outward end is connected to a trolley wire T. A piston 6 for connecting the rod section 7 is slidably inserted into an axial direction in the casing 5. Cylindrical bellows 8 are disposed in the inside of the casing 5, the one end is hermetically closed by the piston 6, and the other end is hermetically closed by the end lid 5c of the casing 5. Orifices 9a, 9b for bringing the inside and outside of the cylindrical bellows 8 into communication are provided in the piston 6 and the end lid 5c of the casing 5. The vibration of the trolley wire T is damped by the internal pressure of the cylindrical bellows 8 with the movement of the piston 6. The internal pressure of the cylindrical bellows 8 is adjusted by the gas coming in/out through the orifices 9a, 9b.

Description

  The present invention relates to a suspension device for supporting a trolley wire under a suspension wire or an auxiliary suspension wire in an overhead wire structure of a train line, and particularly has a function of a damper that absorbs vibration of the trolley wire.

In the trolley wire suspension system, the trolley wire is supported by the hanger that is hung from the suspension wire, but the vibration of the trolley wire when passing through the pantograph causes the trolley wire and the pantograph to be separated from each other. The current collecting performance is deteriorated and the trolley wire is wavy, so it is necessary to suppress the vibration of the trolley wire, which is particularly important in high-speed train lines.
Conventionally, there is a vibration-proof trolley wire suspension device that has a damper function based on spring pressure and frictional resistance against vibration of the trolley wire (Patent Document 1). In this overhead wire structure, a piston having a rod portion for gripping a trolley wire is inserted into a cylinder suspended from an auxiliary suspension wire, and a piston ring that generates frictional resistance with the cylinder is attached to the piston. An axial spring is interposed therebetween to absorb vibration.
Similarly, as a vibration-proof type trolley wire suspension device, a magnetic housing is fixed in the cylinder, and this housing is provided with an axial slot so that it can be contracted in the radial direction. There is one that inserts a piston provided with an adsorption portion and generates frictional resistance by magnetic adsorption with a housing (Patent Document 2).

Japanese Patent Laid-Open No. 06-171402 JP 2003-080976 A

In the former of the above conventional trolley wire suspension devices, sufficient frictional braking force cannot be obtained when the piston ring is worn, so that maintenance and inspection are performed relatively frequently, and the member such as the piston ring needs to be replaced. . In addition, in order to obtain a predetermined frictional resistance between the cylinder and the piston, a high degree of integration accuracy between the constituent members is required. As a result, there is a problem that the manufacturing is not easy and the cost becomes high.
In the latter case, the housing requires relatively frequent maintenance and inspection in consideration of the wear of the magnetic material, and the replacement of the member is required. Further, the structure of the additional member such as the housing provided with the slot and the permanent magnet is complicated. As a result, it is difficult to procure a permanent magnet having an appropriate magnetic force in order to obtain a predetermined frictional resistance between the piston and the piston.
Therefore, the present invention eliminates the need for frequent maintenance inspections and member replacements, stably maintains the intended function, and has a damper function that can be easily manufactured at a low cost with a relatively simple structure. An object is to provide a suspension device.

In the present invention, in order to solve the above-mentioned problem, a casing 5 whose one end side is connected to one of the trolley wire T or the suspension wire M above the trolley wire T, and the other end side of the casing 5 are inserted freely. The piston 6 is provided with a rod portion 7 that extends outwardly of the casing 5 and whose outer end is connected to the other of the trolley wire T or the suspension wire M, and is slidably inserted into the casing 5 in the axial direction. To constitute the trolley wire suspension device 1. Inside the casing 5, one end is locked to the piston 6, and the other end is locked to the casing 5, and is extendable in the axial direction of the rod portion 7 of the piston 6, while restricting the amount of gas flowing in and out. A cylindrical bellows 8 having orifices 9a and 9b for communicating inside and outside is provided. The vibration of the trolley wire T is attenuated by the internal pressure of the cylindrical bellows 7 accompanying the movement of the piston 6.
The rod portion 7 of the piston 6 allows the end lid 5 c of the casing 5 to be inserted in an airtight and slidable manner, one end of the cylindrical bellows 8 is closed by the piston 6, and the other end is hermetically sealed by the end lid 5 c of the casing 5. Close to. The orifices 9 a and 9 b are provided in the piston 6 and the end lid 5 c of the casing 5.
The rod portion 7 of the piston 6 is inserted into the open end of the casing 5 so as to freely enter and exit, and one end portion of the cylindrical bellows 8 is closed by the piston 6 and the other end portion is provided by an inner lid 5f that partitions the casing 5 in the axial direction. The orifice 9a was provided in the piston 6 in an airtight manner.
One end of the casing 5 is connected to the suspension wire T via the hanger 2, and the rod portion 7 of the piston 6 is connected to the trolley wire T via a gripping member such as the ear 4.

  According to the present invention, there are relatively few local wear parts, stable operation can be stably maintained, product life can be extended, maintenance labor and member replacement work can be reduced, Since it has a simple structure that relaxes accuracy, it can be easily manufactured and can be provided at low cost.

It is a front view of the trolley wire suspension apparatus which concerns on this invention. It is a longitudinal cross-sectional view of the trolley wire suspension apparatus of FIG. It is III-III sectional drawing of FIG. It is the schematic which shows an overhead wire structure. It is a longitudinal cross-sectional view of the trolley wire suspension apparatus which concerns on other embodiment of this invention.

Embodiments of the present invention will be described with reference to the drawings.
In FIG. 4, the suspension device 1 suspends a trolley line T from a suspension line M at predetermined intervals.

  1 to 3, the suspension device 1 includes a hanger portion 2 made of a strip-shaped steel material bent in a U-shape in the middle so as to be hooked on a suspension line M via a cover C, and a lower end of the hanger portion 2. A damper part 3 coupled to the part, and an ear part 4 coupled to the lower end part of the damper part 3 to grip the trolley wire T.

  The damper part 3 has a casing 5 with one end closed, and a rod part 7 which is inserted into the other end side of the housing 5 so as to be able to enter and exit in the axial direction, extends outwardly of the casing, and has an outer end coupled to the ear part 4. The piston 6 inserted in the casing 5 and the cylindrical bellows 8 disposed between the casing 5 and the piston 6 are provided.

  The casing 5 has a cylindrical shape, and has an end lid 5a with a handle 5b coupled to the lower end of the hanger portion 2 on one end side, and an end lid 5c having an opening 5d on the other end side. In the illustrated embodiment, the cross-sectional shape of the casing 5 is circular, but is not limited thereto.

  The piston 6 is slidably inserted with its axis aligned with the casing 5 and divides the casing 5 into upper and lower compartments in an airtight manner. The piston 6 is coupled with a load portion 7 that slidably and air-tightly passes through the opening 5d of the end lid 5c of the casing 5.

  A cylindrical bellows 8 is accommodated in the lower compartment of the piston 6 in the casing 5. The cylindrical bellows 8 is cylindrical and has its own spring force, and its outer periphery can expand and contract without contacting the casing 5. The upper end of the cylindrical bellows 8 is airtightly closed by being coupled to the piston 6, and the lower end is airtightly closed by being airtightly connected to the end lid 5 c of the casing 5, and the rod portion 7 penetrates on the axis. An orifice 9 a that allows the upper and lower compartments to communicate with each other passes through the piston 6, and an orifice 9 b that allows the lower compartment to communicate with the outside passes through the end cover 5 c of the casing 5. Accordingly, the cylindrical bellows 8 expands and contracts by the vertical movement of the piston 6, and at that time, allows the air to enter and exit through the orifices 9a and 9b, and applies a resistance force to the vertical movement of the piston 6 by the internal pressure.

  The ear portion 4 holds the trolley wire T by sandwiching the trolley wire T between the pair of ear pieces 4a and 4a and tightening the bolt 4b. As for the ear part 4, the cylindrical coupling | bond part 4c which continues to one ear piece 4a is connected to the rod part 7 with the pin 4d.

In this suspension device 1, when a train pantograph (not shown) passes through the support position of the trolley wire T, the rod portion 7 is pushed up together with the trolley wire T, and the piston 6 rises in the casing 5. , Descend with the trolley line T. At this time, since the cylindrical bellows 8 expands and contracts, the vertical vibration of the trolley wire T is caused by the internal pressure related to the flow rate of air entering and exiting through the orifices 9a and 9b and the flow velocity in addition to the spring pressure of the cylindrical bellows 8. Buffered. Accordingly, if the diameters of the orifices 9a and 9b are appropriately adjusted, an appropriate resistance force is generated against the vibration of the trolley wire T and a damping action is performed. Thereby, the separation rate of the trolley wire with respect to the pantograph is reduced, and the occurrence of wavy wear of the trolley wire is prevented.
The damper portion 3 is mounted in the reverse direction, and the rod portion 7 is connected to the suspension wire M, and the same action is performed even if the casing 5 is connected to the trolley wire T side.

A trolley wire suspension apparatus 10 according to another embodiment of the present invention will be described with reference to FIG. In the figure, the same components as those of the previous embodiment are denoted by the same reference numerals, and description thereof is omitted.
The casing 5 of the damper portion 11 is provided with an inner lid 5f that is open at one end and hermetically partitions the inside in the axial direction. The piston 6 is positioned on the open end side so as to face the inner lid 5f, and the rod portion 7 extends so as to freely enter and leave the open end of the casing 5. The cylindrical bellows 8 has one end coupled to the piston 6 and closed, and the other end coupled to the inner lid 5f and closed, and communicates with the outside through the orifice 9a of the piston 6.
Also in the damper portion 11 of the trolley wire suspension device 10, the rod portion 7 together with the trolley wire T is pushed up as the pantograph passes in the same manner as in the previous embodiment, and the cylindrical bellows 8 expands and contracts. In addition to the spring pressure of the cylindrical bellows 8, the vibration in the vertical direction of the line T is buffered by the internal pressure related to the flow rate and flow velocity of air entering and exiting through the orifice 9a.
In this embodiment, one end of the cylindrical bellows 8 is coupled to the inner lid 5f of the casing 5, but may be configured to be coupled to the end lid 5a of the casing 5 and closed.

DESCRIPTION OF SYMBOLS 1 Suspension apparatus 2 Hanger part 3 Damper part 4 Ear part 5 Casing 6 Piston 7 Rod part 8 Cylindrical bellows 9a Orifice 9b Orifice 10 Trolley line suspension apparatus 11 Damper part T Trolley line M Suspension line

Claims (4)

One end of the casing is connected to one of the trolley wire or the suspension wire above the trolley wire, and the other end of the casing is inserted into the casing so as to freely enter and extend, and the outer end extends to the trolley wire or A trolley wire suspension device comprising a rod portion connected to the other of the suspension wires, and a piston inserted in a casing so as to be slidable in an airtight manner in an axial direction,
In the casing, one end is locked to the piston and the other end is locked to the casing. The orifice is extendable in the axial direction of the rod portion of the piston, and communicates the inside and outside while restricting the amount of gas flowing in and out. Comprising a cylindrical bellows having
A trolley wire suspension device that attenuates vibration of a trolley wire by an internal pressure of the cylindrical bellows accompanying the movement of the piston. The rod portion of the piston is inserted in an airtight manner so that the end lid of the casing is slidable,
One end of the cylindrical bellows is closed by the piston, and the other end is airtightly closed by the end cover of the casing,
The trolley wire suspension device according to claim 1, wherein the orifice is provided in an end lid of the piston and the casing. The rod portion of the piston is inserted so as to freely enter and exit the open end of the casing,
One end of the cylindrical bellows is closed by the piston, and the other end is hermetically closed by an inner lid that partitions the casing in the axial direction.
The trolley wire suspension device according to claim 1, wherein the orifice is provided in the piston. The one end part of the said casing is connected with the said suspension wire through a hanger, and the rod part of the said piston is connected with the said trolley wire through a holding member. Trolley wire suspension device.

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