JP2012165528A - Pantograph with lift adjusting member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pantograph with a lift adjusting member, which is improved so that lift is positive regardless of a vehicle speed in order to prevent bouncing of the pantograph from a trolley wire.SOLUTION: A drooping planar member (lift addition member) 30 is attached to the ceiling tube 25 of the pantograph. When a part drooping from the ceiling tube 25 is provided, a flow field changes around the ceiling tube 25. Since the speed of airflow flowing above a collector head 10 is faster than the speed of airflow flowing below the collector head, the lift is generated in the ceiling tube 25. When the vehicle speed increases, variation in contact force increases and the pantograph bounces easily. The lift addition member is attached to the ceiling tube 25, so that the contact force is supplemented by the lift so as not to be reduced, and thereby bouncing can be prevented.

Description

  The present invention relates to a current collector (pantograph) for supplying electricity to a railway vehicle from a trolley wire installed in the air. In particular, the present invention relates to a pantograph with a lift adjustment member that has been improved so as to prevent separation from a trolley line by adding lift (the speed characteristic of lift is an appropriate plus characteristic).

  In the current electric railway, a method of sending electric power from a trolley line (overhead line) to a vehicle via a pantograph mounted on a vehicle body roof is common. Such a pantograph includes a boat body (including a sliding plate) pressed against a trolley wire, a support mechanism that supports the boat body so as to be movable up and down, and a push-up force that presses against the trolley wire.

  The running pantograph presses the sliding plate against the trolley wire by the lift force it receives and the mechanical force of the support mechanism. The lift varies depending on the vehicle speed, etc. When the lift is small or negative (acts in the direction of lowering the pantograph), the force pressed against the trolley wire is equal to or smaller than the static push-up force. End up. At this time, if the contact force fluctuation between the trolley line and the pantograph is greatly affected, there is a possibility that a separation phenomenon occurs in which the hull of the pantograph is separated from the trolley line. Particularly when the vehicle speed is high, the fluctuation of the contact force becomes large due to the disturbance from the trolley line, and the line is likely to be disconnected.

  For this reason, it is preferable that the lift of the pantograph has a certain degree of positive characteristic with respect to the vehicle speed (the lift increases as the vehicle speed increases).

  The present invention has been made in view of the above problems, and provides a pantograph with a lift adjustment member that is improved so that lift is positive regardless of vehicle speed in order to prevent separation from the trolley line. The purpose is to do.

  A pantograph with a lift adjustment member of the present invention includes a frame that is installed on a roof of an electric railway vehicle and that can stand up and down, a boat that is supported on the frame and holds a sliding plate that slides on a trolley wire, It has a ceiling pipe that connects the tops of the left and right frame bodies of the frame, and a lifting force adding member is attached to the ceiling pipe.

  In the pantograph, when the vehicle speed increases, the contact force fluctuation increases and the line is easily separated. In order to reduce this separation line, it is desirable to have a lift characteristic with a certain degree of inclination relative to the vehicle speed. In the present invention, a lifting force adding member is attached to the ceiling pipe, and the contact force is supplemented by the lift force so that the contact force does not become negative, so that the separation line can be suppressed. In addition, as a specific configuration example of the lift addition member, a lift addition member such as a downward protruding shape may be attached to a ceiling tube that is generally a stainless steel round tube.

  In the present invention, the lift addition member can be a plate-like member that hangs downward or a member that has a corner protruding downward.

  By providing a portion that hangs down from the ceiling pipe or projects downward, the flow field changes around the ceiling pipe. And it is thought that the speed of the airflow flowing above the hull becomes faster than the speed of the airflow flowing below, and lift is generated in the ceiling pipe. Therefore, it is possible to give lift to the hull through the ceiling pipe by attaching a plate-like member hanging downward to the ceiling pipe and a member having a corner protruding downward.

It is desirable that the pantograph has such characteristics that the lift increases as the vehicle speed increases. Therefore, by attaching a lift adding member to the ceiling pipe and adding the lift to the ceiling pipe, the contact force can be supplemented by the lift, so that the occurrence of separation can be suppressed.
Specifically, the lift addition member can be a member that hangs downward from the ceiling pipe or projects downward. By attaching such a member, it is considered that the speed of the airflow flowing above the hull becomes higher than the speed of the airflow flowing below, and lift is generated in the ceiling pipe.

It is a figure which shows the structure of the upper part (boat body vicinity) of the pantograph with a lift adjustment member which concerns on the 1st Embodiment of this invention, FIG. 1 (A) is a front view, FIG.1 (B) is the side of a ceiling pipe It is sectional drawing. It is a figure which shows the structure of the upper part (boat body vicinity) of the pantograph with a lift adjustment member which concerns on the 2nd Embodiment of this invention, FIG. 2 (A) is a front view, FIG.2 (B) is the side of a ceiling pipe It is sectional drawing. It is a perspective view which shows the whole structure of the pantograph with a lift adjustment member of this invention. It is a side view which illustrates typically the whole structure of the pantograph with a lift adjustment member of the present invention. It is a graph which shows the measurement result of the lift of a pantograph.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, with reference to FIG. 3, FIG. 4, the whole structure which concerns on one Embodiment of the pantograph with a lift adjustment member of this invention is demonstrated. FIG. 3 is a perspective view of the pantograph, and FIG. 4 is a side view schematically illustrating the structure of the pantograph.
The pantograph 1 with a lifting force adjusting member includes a boat body 10 that holds a sliding plate body 11 that slides on a trolley wire T, and a frame that supports the boat body 10 and is installed on the roof 3 of an electric railway vehicle so as to stand upside down. 20 is mainly provided. As shown in FIG. 4, these are attached to a frame 5 fixed to a vehicle roof 3 via an insulator 4.

  The boat body 10 is a box-like body extending along the width direction (left-right direction) of the vehicle body. The boat body 10 is made of an aluminum alloy or the like, for example. In this example, two boat bodies 10 are arranged in parallel to the traveling direction (front-rear direction). A sliding plate 11 is attached to the upper surface of each boat body 10. For example, the slip plate 11 is made of an iron-based or copper-based sintered alloy, a carbon-based material, or the like. The sliding plate 11 is in direct contact with the trolley wire T. By providing two boat bodies 10 as in this example, any one of the sliding plates 11 can be reliably landed on the trolley wire T. The two boat bodies 10 are supported by left and right boat supports 13 near both ends. Each boat support 13 is provided with a horn 14 (see FIG. 3) extending outward in the left-right direction.

  The frame 20 is a lower frame crossing type in this example, and has front and rear frame bodies 21A and 21B as shown in FIG. Each frame 21 includes an upper frame 22 and a lower frame 23 that are rotatably connected. The upper end of the upper frame 22 of each frame 21 is connected to the ceiling tube 25. The ceiling tube 25 is, for example, a metal cylindrical tube extending in the left-right direction. A lifting force adding member 30 is attached to the ceiling tube 25. The lift adding member 30 will be described later. Left and right boat supports 13 are supported at both ends of the ceiling tube 25.

  As shown in FIG. 4, the lower end of the lower frame 23 of one (the front side in this example) frame 21 </ b> A is connected to the main shaft 41. The main shaft 41 is rotatably attached to a mounting flange 42 on the frame 5. At the same time, the lower end of the lower frame 23 is connected to a main spring 43 disposed on the frame 5. The main spring 43 is a spring that applies a rising force to the frame 20.

  One end of a counter bar 45 is connected to the main shaft 41. The other end of the counter bar 45 is connected to the lower end of the lower frame 23 of the other frame body 21 </ b> B (the rear side in this example) by a mounting flange 46 on the frame 5.

  This pantograph 1 with a lift adjustment member moves up and down as follows. To raise the hull 10, the release mechanism (not shown) is released and the main spring 43 is contracted. Then, the main shaft 41 rotates in the counterclockwise direction in response to the restoring force of the main spring 43, and thereby the lower frame 23 of the front frame body 21A rises. At the same time, the lower frame 22 of the rear frame body 21 </ b> B rises through the counterbalance 45. As each lower frame 23 rises, the upper frame 22 of each frame 21 performs an indirect motion, the frame 20 extends, and the boat support 13 is lifted through the ceiling tube 25. In this way, the boat body 10 rises and the sliding plate 11 is pressed against the trolley line T.

  Conversely, to lower the boat body 10, the lower frame 23 of the front frame body 21 </ b> A is tilted with a folding cylinder (not shown). At the same time, the main shaft 41 rotates in the clockwise direction in the drawing, and the lower frame 23 of the rear frame body 21 </ b> B falls over the counter rod 45. Then, the upper frame 22 of each frame body 21 is folded, and the boat body 10 is lowered through the ceiling pipe 25. When the frame 21 is in the folded state, the main spring 43 is extended, and the pantograph 1 can be locked in the folded state by locking with a key device (not shown).

The structure of a pantograph with a lift adjustment member according to the first embodiment of the present invention will be described mainly with reference to FIGS. 1A is a front view of a pantograph, and FIG. 1B is a side sectional view of a ceiling pipe.
Two plate-like members 30 (lifting addition members) that hang downward are attached to the ceiling pipe 25 of the pantograph with a lifting force adjusting member of this example. The plate-like member 30 is attached side by side in the left-right direction at a position that is substantially symmetrical with respect to the center in the left-right direction of the ceiling tube 25.

  The plate-like member 30 is made of resin, metal, or the like, and, for example, as shown in FIG. 1B, the cross-sectional shape of the attachment member 30a has an arc shape and extends substantially vertically downward from the lower end of the attachment member 30a. And a warm-hanging drooping portion 30b. The plate member 30 is attached to the ceiling tube 25 by fixing the attachment portion 30a to the ceiling tube 25 with a screw 31 or the like so that the attachment portion 30a is applied along the ceiling tube 25 and the hanging portion 30b is suspended substantially vertically. Can be attached.

  The reason why the lift of the pantograph 1 is improved by attaching the plate-like member 30 to the ceiling tube 25 in this way is estimated as follows. If there is a member that hangs downward from the ceiling tube 25, the flow field changes around the ceiling tube 25, particularly above and below the hull. Then, the speed of the airflow flowing above the hull becomes higher than the speed of the airflow flowing below, and lift is generated in the ceiling pipe 25.

  Since it has been experimentally confirmed that the degree of improvement in lift varies depending on the length and area of the hanging part 30b of the plate-like member 30, the speed of the vehicle mounted and the frequency of the tunnel in the travel section (generally in the tunnel) The length and area of the drooping portion 30b are selected according to, for example, the opposing wind speed increases.

  In this example, the two plate-like members 30 are mounted side by side in the left-right direction, but may be one or three or more.

With reference to FIG. 2, the structure of the pantograph with a lift adjusting member according to the second embodiment of the present invention will be described. 2A is a front view of the pantograph, and FIG. 2B is a side sectional view of the ceiling pipe.
Two prismatic members 50 (lifting addition members) are attached to the ceiling tube 25 of the pantograph with a lifting force adjusting member of this example. As shown in FIG. 2C, the prism member 50 is arranged in the left-right direction at a position that is substantially symmetrical with respect to the center in the left-right direction of the ceiling tube 25, with one corner C protruding downward. It is attached.

  The prism member 50 is also made of resin or metal, and can be configured by vertically dividing a prism having a through hole 51 having the same diameter as the ceiling tube 25 as shown in FIG. The prismatic member 50 is fixed to the ceiling tube 25 by fixing each divided piece 52 to the ceiling tube 25 with a screw 53 or the like in such a posture that each of the divided pieces 52 sandwiches the ceiling tube 25 so as to protrude downward. Can be attached.

  It is considered that the pantograph in this example can improve lift for the same reason as the pantograph in FIG. Although the prism member 50 has corners at the top and bottom, the air flow conditions around the top and bottom corners are different from each other because the upper and lower air flow conditions of the prism member 50 are different depending on the presence of the boat body 10.

  Since there is a portion that hangs down from the ceiling tube 25 or protrudes downward in this way, the lift can be improved. Therefore, in addition to these embodiments, there is a portion that hangs down or protrudes downward. A member can be used. For example, instead of the prismatic member shown in FIG. 2, a triangular prism-shaped member may be used and attached to the ceiling pipe so that one corner of the member protrudes downward.

  Moreover, although the lower frame crossing type pantograph has been described in the present embodiment, it can also be applied to a rhombus or single arm type pantograph.

Next, the experimental results of measuring the lift of the pantograph with the lift adjustment member of the present invention will be described with reference to the graph of FIG. The vertical axis of the graph represents lift (N), and the horizontal axis represents wind speed (vehicle speed) (km / h). As a comparative example, a member not provided with a lifting force addition member was cited.
In the comparative example without the lift addition member, the lift gradually increases as the vehicle speed increases, but does not reach 5 N at the maximum.
In contrast, the pantograph with the lift adjusting member of the present invention shown in FIGS. 1 and 2 also gradually increases in lift as the vehicle speed increases. When the vehicle speed exceeds 70 km / h, the lift begins to increase further, reaching a maximum of about 18N. From this, it was confirmed that the pantograph of the present invention improves the lift particularly at a high vehicle speed.

DESCRIPTION OF SYMBOLS 1 Pantograph with a lift adjustment member 3 Roof 4 Insulator 5 Frame 10 Ship body 11 Sliding board 13 Boat support 14 Horn 20 Frame 21 Frame body 22 Upper frame 23 Lower frame 25 Ceiling pipe 30 Plate member (lift addition member) 31 Screw 41 Main shaft 42 Mounting flange 43 Main spring 45 Balance rod 46 Mounting flange 50 Square column member (lifting force adding member) 51 Through hole 52 Split piece 53 Screw

Claims (3)

A frame that can stand up and down installed on the roof of an electric railway vehicle;
A boat body that is supported on the frame and holds a sliding plate that slides on the trolley wire,
A pantograph comprising
A ceiling pipe that connects the tops of the left and right frames of the frame;
A pantograph with a lift adjustment member, wherein a lift addition member is attached to the ceiling pipe.   The pantograph with a lift adjustment member according to claim 1, wherein the lift addition member is a plate-like member that hangs downward.   The pantograph with a lift adjustment member according to claim 1, wherein the lift addition member is a member having a corner protruding downward.

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