JP7245587B2 - Vibration-absorbing support member for catenary in contact line and support structure using the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vibration-absorbing support member for a catenary wire that suspends a trolley wire via a hanger on an overhead contact line, and a support structure for the catenary wire.

In order to obtain stable current collection by the pantograph of a train, it is ideal that the amount of push-up of the contact wire is uniform over the entire contact wire, that is, that the spring constant of the overhead wire is uniform. In a catenary system called a simple catenary, the contact wire is fixed below the catenary via a hanger, thereby suppressing changes in the amount of push-up of the contact wire. However, since the catenary wire is fixed to supporting objects such as movable brackets at supporting points for each predetermined span along the line, the spring constant of the catenary wire increases near the supporting point, and the contact wire is pushed up by a large amount. It tends to be extremely small.
In order to reduce this change, an overhead wire system called a modified Y-shaped simple catenary has been proposed (see Non-Patent Document 1). In this overhead wire system, as shown in FIG. 12, an auxiliary overhead wire M2 called a Y wire is provided near the support point S in order to increase the lifting amount of the trolley wire T near the support point S of the overhead wire M. A contact wire T is suspended by a hanger H from this auxiliary overhead wire M2. As a result, the trolley wire T is structurally separated from the support point S of the suspension wire M, thereby enhancing the effect of the spring and making it easier for the trolley wire T to be pushed up.
Further, in Patent Document 1, a suspension wire restraint is provided so as to be in close contact with the outer periphery of the suspension wire over a predetermined length on both sides of the support point of the suspension wire by the movable bracket, and is fixed to the movable bracket together with the suspension wire at the center. A vibrating device is described. This vibration damping device includes an inner fixing member that is fixed in close contact with the suspension wire, an outer slide member that is superimposed on the inner fixing member, and a viscoelastic body that is adhered between these members. The inner fixing member is fixed in close contact with the catenary wire over a predetermined length on both sides of the support point of the catenary wire so as to integrally follow the behavior of the catenary wire. The outer slide member is superimposed on the outer side of the inner fixed member so as to be displaceable relative to the inner fixed member in the extension direction of the suspension wire as the suspension wire vibrates. In this vibration damping device, the suspension wire itself is provided with a vibration damping function on both sides of the support point in the extension direction to suppress vibration while the suspension wire has a fixed point.

Trolley Watching, retrieved May 25, 2017, Internet (URL: http://blog.kaz-ic.net/post/141673090232/)

JP 2016-179775 A

In the overhead wire system described in Non-Patent Document 1, the tension of the overhead wire is divided into the overhead wire M and the auxiliary overhead wire M2 at the connection point of the auxiliary overhead wire M2. , the catenary (catenary curve) of the auxiliary overhead wire M2 changes. Therefore, maintenance such as adjustment of the length and mounting position of the hanger H connecting the auxiliary overhead wire M2 and the contact wire T is required.
In the overhead wire system using the vibration damping device described in Patent Document 1, the suspension wire itself is intended to have a vibration damping function on both sides of the support point in the extension direction while the support point of the suspension wire is a fixed point. Therefore, the leveling effect by reducing the spring constant at the supporting point of the overhead wire is not necessarily sufficient.
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a suspension wire support structure that saves the trouble of maintenance and can equalize the spring constant of the suspension wire without forming a fixed point directly on the suspension wire. there is

The following description refers to the reference numerals in the attached drawings, but the present invention is not limited thereto.
In order to solve the above problems, a vibration absorbing support member for a catenary wire M according to the present invention supports a catenary wire M, which is installed below a support such as a movable bracket B, on a support. The vibration-absorbing support member 1 is supported by the support B at its central portion so as to extend on both sides of the support B along the suspension line M, and is made of a member having a spring rigidity that both sides bend in a direction perpendicular to the extension direction, It is connected to a catenary M at both ends.

In the vibration-absorbing support member 1 for the suspension wire M of the present invention, the suspension wire M is not directly supported by the support B, and the support points of the suspension wire M are two ends of the vibration-absorbing support member 1 having a small spring constant. Since they are distributed in places, the spring constant near the supporting point of the overhead wire is reduced, thereby reducing the contact loss rate of the pantograph. Since the hanger H is supported only by the suspension wire M without being supported by the vibration absorbing support member 1, there is no change in the catenary associated with movement of the suspension wire due to temperature changes or the like at the location where the hanger H is installed. Therefore, adjustment of the hanger H is unnecessary.

1 is a front view of a suspension wire support structure according to a first embodiment of the present invention; FIG. FIG. 2 is an enlarged front view with a part of the suspension wire support structure of FIG. 1 cut away; FIG. 2 is a cross-sectional view taken along line III-III in FIG. 1; FIG. 2 is a sectional view along IV-IV in FIG. 1; FIG. 2 is an enlarged view of a V portion of FIG. 1; FIG. 6 is a front view of a suspension wire support structure according to a second embodiment of the present invention; FIG. 7 is an enlarged front view with a part of the suspension wire support structure of FIG. 6 cut away; FIG. 7 is an enlarged plan view with a part of the suspension wire support structure of FIG. 6 cut away; FIG. 7 is a cross-sectional view taken along line IX-IX of FIG. 6; FIG. 7 is a cross-sectional view taken along the line XX of FIG. 6; FIG. 7 is an enlarged view of a V portion of FIG. 6; FIG. 11 is an enlarged front view of a partially cutaway suspension wire support structure according to a third embodiment of the present invention; 13 is a cross-sectional view taken along line XIII-XIII of FIG. 12; FIG. 13 is a cross-sectional view taken along line XIV-XIV of FIG. 12; FIG. FIG. 11 is an enlarged front view of a partially cutaway suspension wire support structure according to a fourth embodiment of the present invention; FIG. 16 is an enlarged plan view with a part of the suspension wire support structure of FIG. 15 cut away; FIG. 16 is a cross-sectional view taken along line XVII-XVII of FIG. 15; FIG. 16 is a cross-sectional view taken along line XVIII-XVIII of FIG. 15; FIG. 11 is an enlarged front view of a partially cutaway suspension wire support structure according to a fifth embodiment of the present invention; Fig. 20 is an enlarged plan view with a part cut away of the suspension wire support structure of Fig. 19; It is the enlarged front view which notched a part of support structure of the catenary wire which concerns on the modification of the 5th Embodiment of this invention. FIG. 21 is an enlarged plan view with a part cut away of the suspension wire support structure of FIG. 20; It is an explanatory view of a modified Y-shaped simple catenary system.

A first embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the overhead wire M is provided with a vibration-absorbing support member, such as a horizontal main pipe of a movable bracket B extending perpendicularly upward from the track, from a post on the side of the track for each predetermined span in the extension direction. 1. The overhead wire M suspends the trolley wire T with a hanger H at predetermined intervals in the wire extension direction.

The vibration absorbing support member 1 is fixed to the movable bracket B via the support fitting 7 at the support portion 1a near the center, extends to both sides in the extension direction along the suspension wire M, and is connected to the suspension wire M at both ends. . Therefore, the catenary M passes under the movable bracket B without being directly fixed to the movable bracket B. As shown in FIG. The hanger H is not provided inside both ends of the vibration absorbing support member 1, but is provided between the suspension wire M and the trolley wire T on the outside thereof.

Both sides of the vibration absorbing support member 1 have spring rigidity that bends in a direction orthogonal to the extension direction, and elastically suspends the suspension wire M at both ends. Therefore, the vibration absorbing support member 1 has springiness and rigidity to withstand the weight of the overhead wire M even when the overhead wire M is connected to its tip, and has tensile strength to withstand the tension of the overhead wire. The vibration absorbing support member 1 has a shape along a catenary equivalent to the catenary of the suspension wire M formed on both sides of the movable bracket B when the suspension wire M is directly fixed to the movable bracket B, and has a central horizontal support portion. 1a and spring portions 1b bent at a predetermined angle and extending obliquely downward on both sides thereof.

The embodiments shown in FIGS. 1 to 5 are suitable for use in curved sections of contact lines. In the curved section, the catenary line M is pulled sideways and the road surface of the contact line is slanted. It vibrates in the direction perpendicular to the line. The structure of the vibration-absorbing support member 1 of the present embodiment is effective when considering a shape that can accommodate individual bends in the suspension wire curved portion. The vibration-absorbing support member 1 is formed by covering the outer circumference of a round bar-shaped core material 2 with a large number of elongated suppressing materials 4 via a viscoelastic body 3 (FIG. 3). The viscoelastic body 3 is firmly adhered to the core material 2 and the suppressing material 4 . Both the core material 2 and the restraining material 4 are made of a metal material such as steel having a predetermined spring rigidity, and are bent so as to form a horizontal support portion 1a and an inclined spring portion 1b as a whole. Since the core material 2 is in the shape of a round bar, it has a spring property to bend in a direction perpendicular to the length direction. The core 2 is exposed at both ends and is connected to the catenary M by means of fasteners 8 . A plurality of restraining members 4 are adhered in an annular manner around the core member 2, and a slight gap is formed between the adjacent restraining members 4 to avoid mutual interference when the spring portion 1b is flexed.

As shown in FIG. 4, in the horizontal support portion 1a of the vibration-absorbing support member 1, the outer periphery of the core material 2 is not covered with the viscoelastic body 3, and a cylindrical spacer fitting 5 is fitted instead.

As shown in FIG. 5, the restraining material 4 is bound around the core material 2 with tie bands 6 near both ends. Annularly continuous grooves 4a are formed at both ends of the suppressing member 4, and the binding band 6 is arranged in the grooves 4a. The groove width of the groove 4a is larger than the width of the binding band 6, so that each restraining member 4 can be individually displaced relative to the core member 2 in its axial direction.

When the vibration-absorbing support member 1 receives the vibration of the suspension wire M and vibrates in the direction perpendicular to the length direction on both sides thereof, the suppressing members 4 expand and contract the viscoelastic bodies 3, respectively, and the core member 2 and the vibration-absorbing support member 1 vibrate. relative displacement in the axial direction. At this time, the vibration of the vibration absorbing support member 1 is damped by the viscoelastic body 3 .

The support fitting 7 is fixed to the lower portion of the movable bracket B. As shown in FIG. The horizontal support portion 1a of the vibration absorbing support member 1 is put on the horizontal support plate 7a of the support fitting 7 and fixed with U bolts 7b. Although not shown, the support fitting 7 may be structured to be fixed to the upper portion of the movable bracket B, and the structure may be such that the vibration absorbing support member 1 is supported to the upper portion of the movable bracket B. FIG.

Since the overhead wire M is suspended from the movable brackets B at both ends of the vibration absorbing support member 1, the support points are distributed at two locations. It is possible to reduce the spring constant of the overhead wire near the point, thereby reducing the contact loss rate of the pantograph. In addition, since the vibration-absorbing support member 1 has a vibration-absorbing function, it is possible to attenuate the vibration in the traveling direction transmitted to the overhead wire and the vibration reflected at the support point as the pantograph passes. has the effect of reducing Furthermore, it can be expected that vibration transmitted from the movable bracket B and the like on the ground side during an earthquake can be blocked or attenuated by the vibration-absorbing support member 1 with respect to the overhead wire.

6 to 11 show a second embodiment of the invention. In the following description, the same reference numerals are given to the same parts as those of the components already described, and the description thereof will be omitted.

The vibration absorbing support member 1 has a viscoelastic body 13 interposed between a strip-shaped main plate member 12 and a suppressing plate member 14 overlapping thereon. The viscoelastic body 13 is firmly adhered to the main plate member 12 and the suppression plate member 14 . Both the main plate member 12 and the suppression plate member 14 are made of a metal material such as steel having a predetermined spring rigidity in the vertical direction of thickness. It is bent to form 1b. Since the main plate 12 has a strip-like shape, it has a spring property to bend in the vertical thickness direction. The main plate 12 is exposed at both ends and is connected to the catenary M by fasteners 18 .

As in the previous embodiment, the vibration-absorbing support member 1 has springiness and rigidity to withstand the weight of the overhead wire M even when the overhead wire M is connected to its tip, and has tensile strength to withstand the tension of the overhead wire.

As shown in FIG. 7, in the horizontal support portion 1a of the vibration absorbing support member 1, the viscoelastic body 3 is not interposed between the main plate member 12 and the suppressing plate member 14, and a spacer plate 15 is inserted instead. and the three are fixed together.

As shown in FIG. 8, the suppression plate member 14 is bound together with the main plate member 12 by binding bands 16 near both ends. Concave portions 12a and 14a are formed at both edges of the binding portion of the main plate member 12 and the restraining plate member 14, and binding bands 16 are arranged in the concave portions 12a and 14a. The width of the concave portions 12a and 14a is larger than the width of the binding band 16, so that the restraining plate member 14 is relatively displaceable with respect to the main plate member 12 in its longitudinal direction.

When the vibration absorbing support member 1 vibrates vertically on both sides thereof and bends, the suppressing plate member 14 causes the viscoelastic body 13 to expand and contract, and is displaced relative to the main plate member 12 in the longitudinal direction. At this time, the vibration of the vibration absorbing support member 1 is damped by the viscoelastic body 13 .

The support bracket 17 is fixed to the lower portion of the movable bracket B. As shown in FIG. The horizontal support portion 1a of the vibration absorbing support member 1 is put on the horizontal support plate 17a of the support metal fitting 17, and the pressing plate 17c is placed thereon and fixed with a U-shaped bolt 17b. Although not shown, the support metal fitting 17 can be structured to be fixed to the upper portion of the movable bracket B, and the vibration absorbing support member 1 can be structured to be supported to the upper portion of the movable bracket B. FIG.

12 to 14 show a third embodiment of the invention.
The vibration-absorbing support member 1 is formed by covering the outer circumference of a round bar-shaped core material 22 with a large number of elongated suppressing materials 24 via viscoelastic bodies 23 in the same manner as in the first embodiment. The vibration-absorbing support member 1 has spring portions 1b at both ends bent from a horizontal support portion 1a and extending obliquely downward. . That is, the diameter of the core member 22 decreases toward the tip of the portion corresponding to the spring portion 1b. The viscoelastic body 23 is adhered on the core material 22 with a uniform thickness. The restraining material 24 has a uniform thickness, and the width becomes narrower toward the tip.

In the vibration absorbing support member 1 of this embodiment, the spring portion 1b has a tapered shape, and the spring property of bending in the direction perpendicular to the length direction is enhanced, and the vibration damping effect of the viscoelastic body 23 is improved.

15 to 17 show a fourth embodiment of the invention.
As in the second embodiment, the vibration absorbing support member 1 has a viscoelastic body 33 interposed between a strip-like main plate member 32 and a restraining plate member 34 overlapping thereon. The viscoelastic body 33 is firmly adhered to the main plate member 32 and the suppression plate member 34 . The vibration-absorbing support member 1 has spring portions 1b at both ends bent from a horizontal support portion 1a and extending obliquely downward. formed into a shape. That is, the main plate member 32 has a tip-side thickness T2 and W2 smaller than a base-side top and bottom thickness T1 and a left-right width W1, and is tapered from the base to the tip. The viscoelastic body 33 and the suppression plate member 34 have a uniform thickness, but corresponding to the main plate member 32, the width W2 on the tip side is gradually smaller than the left and right width W1 on the base side.

Since the spring portion 1b of the vibration absorbing support member 1 has a tapered shape, the spring property in the vertical and horizontal directions is enhanced, and the vibration damping effect of the viscoelastic body 23 is improved.

18 and 19 show a fifth embodiment of the present invention.
As in the second embodiment, the vibration absorbing support member 1 is provided with a viscoelastic body 13 firmly adhered between a strip-shaped main plate member 12 and a suppressing plate member 14 overlapping thereon. Further, a superimposed member 35 is fixed to the lower surface of the main plate member 12, and the thickness of the tip side of the spring portion 1b is thinner than that of the base end side. That is, the superimposed member 35 is formed of a metal plate material such as steel having a predetermined spring rigidity over substantially the middle portion between the support portion 1a and the spring portion 1b, and is fixed to the lower surface of the main plate member 12 at the support portion 1a.

In this vibration absorbing support member 1, the thickness of the spring portion 1b on the tip end side is smaller than that on the base end side due to the overlapping member 35, so that the spring stiffness in the vertical thickness direction is increased, and the vibration damping effect of the viscoelastic body 23 is improved.

As shown in FIGS. 21 and 22, the superimposed member 35 in the previous embodiment may be constructed by stacking a plurality of superimposed plates 35a, 35b, and 35c, which are successively shorter in the longitudinal direction, and fixing them at the support portion 1a. Also in this vibration absorbing support member 1, the thickness of the spring portion 1b is gradually reduced from the base end side to the tip end side by the overlapping member 35, so that the spring rigidity in the vertical thickness direction is further increased.

1 Vibration-absorbing support member 1a Horizontal support 2 Core material 3 Viscoelastic body 4 Suppressing material 4a Groove 5 Spacer fitting 6 Binding band 7 Support fitting 7a Support plate 8 Clamping fitting 12 Main plate material 13 Viscoelastic body 14 Suppressing plate material 14a Recess 15 Spacer Plate 16 Binding band 17 Supporting metal fitting 17a Supporting plate 17b U-shaped bolt 17c Pressing plate 18 Fastening metal fitting 22 Core material 23 Viscoelastic body 24 Restricting material 32 Main plate material 33 Viscoelastic body 34 Restricting plate material 35 Overlapping member 35a Overlapping plate 35b Overlapping plate 35c Overlapping plate B Movable bracket H Hanger M Catenary wire T Trolley wire

Claims (4)

A vibration-absorbing support member for supporting, on the support, a catenary installed under the support,
A round-bar-shaped core material, which is supported at the center by the support so as to extend on both sides of the support along the suspension wire, and which is connected to the suspension wire at both ends, and is arranged in the circumferential direction covering the outer circumference of the core. Equipped with multiple suppressors,
The core member radially shrinks toward both ends from the central portion supported by the support, and the suppressing member has a circumferential width that narrows toward both ends. 1. A vibration absorbing support member for a overhead wire in a contact line, characterized in that it has a spring rigidity that allows it to bend, and is further formed by adhering a viscoelastic body between a core member and a suppressor member. A vibration-absorbing support member for supporting, on the support, a catenary installed under the support,
A strip-shaped main plate member supported by the support at its central portion so as to extend on both sides of the support along the suspension wire, and connected to the suspension wire at both ends, and a restraining plate member overlapping the main plate member. ,
The main plate member has a thickness and width that decrease toward both ends from a central portion supported by the support, and the restraint plate member has a width that decreases toward both ends. A vibration-absorbing support member for a overhead wire in a contact line, characterized in that it has a spring rigidity such that both sides thereof are bent against the main plate member and a viscoelastic body is adhered between the main plate member and the restraining plate member. 3. A support structure using a vibration-absorbing support member for a catenary line in a contact line according to claim 1 or 2, wherein the overhead wire is supported below the support via the vibration-absorbing support member. 4. A support structure for a catenary wire in a contact line according to claim 3, wherein a contact wire is supported below the catenary wire outside between both ends of the vibration-absorbing support member via a hanger.

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