JP7429005B2 - Mounting parts for tension adjustment device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mounting member for attaching a tension adjustment device to a support column for adjusting the tension of overhead contact lines necessary for supplying electric power to a railway vehicle.

In general, when the tension changes, overhead contact lines have the problem of separating from the pantograph or increasing stress, and to prevent this, it is necessary to construct the line with appropriate tension to maintain contact with the pantograph. be. Furthermore, fluctuations in tension due to expansion and contraction of the overhead contact line due to changes in outside temperature, etc., are thought to be a factor for fluctuations in the tension of the overhead contact line.

As a means of adjusting the tension of the overhead contact line, a tension adjustment device is installed at the holding point of the overhead contact line, and the tension adjustment device maintains the tension of the overhead contact line at an appropriate level. There is. Various forms of such tension adjustment devices are known, and for example, as described in Patent Document 1, tension adjustment devices of a pulley type or a spring type are known.

Japanese Patent Application Publication No. 6-144088

However, while spring-type tension adjustment devices are easier to maintain than pulley-type ones, they have a structure in which heavy objects are placed on top of the columns, so equipment can be damaged due to increased loads on the overhead contact lines and columns during earthquakes. There are concerns. This is thought to be due to the tension adjustment device shaking horizontally due to the earthquake load, resulting in an excessive load being applied to the strut band attached to the strut, leading to equipment damage. A possible reason why such a load is transmitted is that the conventional mounting bracket uses a substantially triangular plate-shaped member.

In addition, the tension adjustment device is fixed by a mounting bracket and a hanging rod installed above the mounting bracket, and in the event of an earthquake, if a bending load is applied to the hanging rod, the hanging rod itself may break. There was a problem.

Furthermore, when the tension adjustment device oscillates, the only hope is that the vibration will be focused by damping of the overhead wires, etc., and if the tension adjustment device oscillates significantly due to an earthquake, etc., it is not possible to actively suppress the oscillation of the tension adjustment device. The problem was that it couldn't be done.

SUMMARY OF THE INVENTION Therefore, an object of the present invention has been made to solve the above-mentioned problems, and the purpose of the present invention is to prevent the load from being transmitted to the support band and the suspension rod when the tension adjustment device is shaken during an earthquake. It is an object of the present invention to provide a mounting member that can prevent damage to a rod, further suppress weight increase, and actively suppress vibrations as a countermeasure when a tension adjustment device is shaken.

A mounting member according to the present invention is a mounting member for mounting a tension adjustment device connected to an overhead contact line and a hanging rod supporting the tension adjustment device to a column, and the mounting member includes a pair of suspension rods attached to the column. a rod-shaped first member attached to each of the strut bands and arranged to extend substantially parallel to the strut; and a second member attached to the tension adjustment device or the hanging rod; The first member and the second member are rotatably assembled to each other by a rotation shaft extending in a direction intersecting the horizontal direction.

Further, in the mounting member according to the present invention, it is preferable that the hanging rod includes a damping mechanism that damps input in the extending direction.

Further, in the mounting member according to the present invention, it is preferable that the rotation axis of the mounting member to which the hanging rod is attached is coaxial with the rotation axis of the attachment member to which the tension adjustment device is attached.

In the mounting member according to the present invention, the rotation axis of the mounting member to which the hanging rod is attached is located along the extension direction of the tension adjustment device, rather than the rotation axis of the attachment member to which the tension adjustment device is attached. It is preferable to arrange the suspension rod on the side where the tension adjustment device is attached.

According to the present invention, the tension adjustment device is attached to the column by the mounting member and the hanging rod, and the mounting member and the hanging rod are connected to a rotation axis extending in a direction crossing the horizontal direction by the first member and the second member. Since they are attached to each other so that they can rotate freely, in the event that the tension adjustment device is shaken due to an earthquake, etc., the load will not be transmitted to the support band and suspension rod, preventing damage to the support band and suspension rod, and suppressing weight increase. be able to.

Further, according to the present invention, since the suspension rod is provided with a damping mechanism that damps input in the extension direction, active vibration damping is possible when the tension adjustment device oscillates.

Further, according to the present invention, since the rotation axes of the mounting members for the tension adjustment device and the hanging rod are arranged substantially coaxially with each other, when the tension adjustment device and the hanging rod move, the tension adjustment device can be moved horizontally. The posture is maintained, and no unnecessary external force is applied to the hanging rod.

Further, according to the present invention, the rotation axis of the attachment member of the hanging rod is disposed closer to the attachment part of the tension adjustment device than the rotation axis of the attachment member of the tension adjustment device, so that the tension adjustment device and the suspension rod can be connected to each other. When the rod oscillates, the tip of the tension adjustment device is in a position facing upward, and the moment due to the tension in this position is applied in the direction of pulling the hanging rod, so buckling of the hanging rod can be prevented.

FIG. 3 is a diagram showing an attached state of the attachment member according to the embodiment of the present invention. FIG. 2 is an enlarged view of a mounting member according to an embodiment of the present invention. The figure which shows the modification of the attachment member based on embodiment of this invention. FIG. 2 is an enlarged view of a mounting member according to an embodiment of the present invention. The figure which shows the structure of the hanging rod based on other embodiment of this invention. FIG. 3 is a diagram showing the operation of the mounting member according to the embodiment of the present invention.

Hereinafter, preferred embodiments for carrying out the present invention will be described using the drawings. Note that the following embodiments do not limit the inventions claimed in each claim, and not all combinations of features described in the embodiments are essential to the solution of the invention. .

FIG. 1 is a diagram showing an attached state of a mounting member according to an embodiment of the present invention, FIG. 2 is an enlarged view of the mounting member according to an embodiment of the present invention, and FIG. 3 is a diagram showing an attached state of a mounting member according to an embodiment of the present invention. FIG. 4 is an enlarged view of the mounting member according to an embodiment of the present invention, and FIG. 5 is a diagram showing a modification of the mounting member according to another embodiment of the present invention. FIG. 6 is a diagram showing the operation of the mounting member according to the embodiment of the present invention.

As shown in FIG. 1, the tension adjustment device 1 includes an outer cylinder member 2, a central cylinder member (not shown), and an inner cylinder member 3, which are three cylinder members arranged coaxially.

A first coil spring in a compressed state is housed in the radial gap between the outer cylinder member 2 and the central cylinder member. One end of the first coil spring is in contact with an outer flange formed on the central cylindrical member, and the other end of the first coil spring is in contact with an inner flange formed on the outer cylindrical member 2.

A second coil spring in a compressed state is housed in the radial gap between the central cylinder member and the inner cylinder member 3. One end of the second coil spring is in contact with an outer flange formed on the inner cylindrical member 3, and the other end of the second coil spring is in contact with an inner flange formed on the central cylindrical member. Grease, which is a lubricant, is applied or filled in the portions where the first coil spring and the second coil spring come into contact with the cylindrical member so as not to inhibit relative sliding between the two. The lubricant is not limited to grease as long as it has a lubricating function.

A contact wire 10 is attached to the end surface of the inner cylinder member 3 in FIG. 1 via a contact wire attachment member. The overhead contact line may be a railway overhead line, but may also be an overhead power line for other purposes, an overhead line for signal transmission, an overhead line for support, or the like.

Further, the tension adjustment device 1 is supported by the support column 11 by the support portion 6 . That is, the flange portion of the support portion 6 is fixed to a mounting member 20 attached to the support column 11 by a support band 12.

Further, one end of a rod-shaped hanging rod 7 is attached to the upper part of the outer cylinder member 2, and the other end of the hanging rod 7 is fixed to the upper part of the support column 11 by a support band 12 via a mounting member 20.

As shown in FIG. 2, the mounting member 20 according to the present embodiment includes a first member 21 that is attached to a column, and a second member 22 that is attached to a tension adjustment device or hanging rod 7 that is connected to the overhead contact line 10. It is equipped with The first member 21 and the second member 22 are rotatably assembled to each other by a rotation shaft 23 or a hanging rod rotation shaft 24 extending in a direction intersecting the horizontal direction (vertical direction in FIG. 1). There is.

The first member 21 is a rod-shaped member extending substantially parallel to the support column 11, and both ends thereof are held and fixed by the support band 12. Note that the rotation axis 23 overlaps the central axis of the first member 21.

The support band 12 includes a pair of outer peripheral parts 15, 15 that are in contact with the outer periphery of the support pillar 11, and attachment parts 14 extending horizontally from both ends of the outer peripheral part 15. The mounting portion 14 has a mounting hole formed substantially in the center, and the mounting hole is arranged on an extension line of the rotation shaft 23 when the first member 21 is attached.

The second member 22 is rotatably attached around the rotation shaft 23 of the first member 21, and has a through hole 27 through which the first member 21 is inserted, and a fixing part fixed to the support part 6. It is equipped with 25.

By configuring the mounting member 20 in this way, the rotation shaft 23 can be arranged approximately parallel to the support column 11 and the rotation shaft 23 can be arranged near the support column 11, so that the tension adjustment device 1 can be Even in the case of shaking, the bending moment generated in the strut band 12 can be minimized to prevent the strut band 12 from being damaged.

Further, in the mounting member according to this embodiment, the hanging rod 7 is also mounted by a mounting member 20 similar to the mounting member 20 attached to the tension adjustment device 1. The rotation axis of the mounting member 20 to which the hanging rod 7 is attached acts as the hanging rod rotation axis 24, so that when the tension adjustment device 1 oscillates, the suspension rod 7 moves as the tension adjustment device 1 oscillates. Since the suspension rod itself can also sway, breakage of the suspension rod 7 can be prevented.

Further, the form of the mounting member 20 is not limited to the above-described form, and may be configured as shown in FIGS. 3 and 4, for example. Specifically, as shown in FIG. 3, the tension adjustment device 1 includes a pivoting portion 13' that is rotatable around a pivoting shaft 23 on the support band 12', and a pivoting portion 13' that is rotatable around a pivoting shaft 23. It is attached by inserting a cotter bolt 26 as a first member into the main body portion 22' as a member. Similarly, the suspension rod 7 is also attached to have a suspension rod rotation axis 24 by a support band 12' having a rotation portion 13'.

The suspension rod 7 may be provided with a damping mechanism 30, as shown in FIG. The damping mechanism 30 can employ various conventionally known damping mechanisms as long as it can damp the external force input in the extending direction of the hanging rod 7. For example, a hydraulic or spring damping mechanism may be used. It is suitable to adopt this method.

At this time, the hanging rod rotating shaft 24 of the mounting member to which the hanging rod 7 is attached is not arranged coaxially with the rotating shaft 23 of the mounting member of the tension adjusting device 1, and is not arranged coaxially with the rotating shaft 23 of the mounting member of the tension adjusting device 1. Accordingly, it is preferable that the suspension rod 7 is arranged so that the length thereof changes so that the damping mechanism functions more effectively due to the change in length.

In addition, when the damping mechanism 30 is not provided on the hanging rod 7, the rotating shaft 23 and the hanging rod rotating shaft 24 are approximately coaxial, or the hanging rod rotating shaft 24 is closer to the tension adjustment device 1 than the rotating shaft 23. It is preferable that they are arranged so that Specifically, as shown in FIG. 6(a), when the rotation shaft 23 and the suspension rod rotation shaft 24 are arranged coaxially with each other, the tension adjustment device 1 and the suspension rod 7 move, and the support band 12, the tension adjustment device 1 can maintain a horizontal posture.

In addition, when the hanging rod rotation shaft 24 is arranged on the tension adjustment device 1 side, the rotation radius of the suspension rod 7 is smaller than the rotation radius of the tension adjustment device 1, as shown in FIG. 6(b). Therefore, the tension adjustment device 1 is in an upward posture, and the tension caused by the contact wire 10 acts on the hanging rod 7 as a tensile load.

On the other hand, when the hanging rod rotation shaft 24 is arranged closer to the support column 11 than the rotation shaft 23, the rotation radius of the suspension rod 7 becomes larger than the rotation radius of the tension adjustment device 1, and the tension adjustment device 1 Be in a downward facing position. In this case, since the tension of the overhead contact line 10 acts on the suspension rod 7 as a compressive load, there is a possibility that the suspension rod 7 will buckle due to the compressive load.

In this way, considering the load applied to the hanging rod 7 due to the movement of the hanging rod 7, it is preferable that the rotating shaft 23 and the hanging rod rotating shaft 24 are arranged coaxially; If this is not possible, it is desirable to arrange the hanging rod rotation shaft 24 on the tension adjustment device 1 side in consideration of construction accuracy.

In addition, in the embodiment mentioned above, the case where the hanging rod 7 was fixed to the support column 11 was explained, but in a tunnel etc., the hanging rod 7 may be configured to be fixed to the wall surface of the tunnel. It is clear from the claims that such modifications or improvements can be included within the technical scope of the present invention.

1 Tension adjustment device 2 Outer cylindrical member 3 Inner cylindrical member 6 Support part 7 Hanging rod 10 Contact wire 11 Strut 12 Strut band 20 Mounting member 21 First member 22 Second member 23 Rotation shaft 24 Hanging rod rotation shaft 30 damping mechanism

Claims (4)

A mounting member for attaching a tension adjustment device connected to an overhead contact line and a hanging rod supporting the tension adjustment device to a column,
The attachment member is attached to each of a pair of support bands attached to the support support , and includes a rod-shaped first member extending substantially parallel to the support support, and a first member attached to the tension adjustment device or the suspension rod. a second member to be attached;
A mounting member characterized in that the first member and the second member are rotatably assembled to each other by a rotation shaft extending in a direction intersecting a horizontal direction. The mounting member according to claim 1,
The mounting member is characterized in that the hanging rod is provided with a damping mechanism that damps input in the extension direction. The mounting member according to claim 1 or 2,
A mounting member characterized in that a rotation axis of the mounting member to which the hanging rod is attached is arranged coaxially with a rotation axis of the attachment member to which the tension adjustment device is attached. The mounting member according to claim 1 or 2,
The rotation axis of the attachment member to which the hanging rod is attached is located along the extension direction of the tension adjustment device rather than the rotation axis of the attachment member to which the tension adjustment device is attached. A mounting member characterized in that it is arranged on the side of the body.

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