JP7041604B2 - Pantograph lifting system for rail vehicles - Google Patents

Description

The present invention relates to an elevating system for a pantograph for a railroad vehicle, and particularly to a system for automatically lowering the pantograph in the event of an earthquake.

A vehicle for an electric railway (hereinafter, simply referred to as a "vehicle") travels when a pantograph attached to the upper part of the ceiling surface of the vehicle slides in contact with an overhead wire erected above the rail to receive power. The pantograph is raised so as to be in contact with the overhead wire from below by being raised by a push-up mechanism for raising and lowering the pantograph.

As shown in FIG. 1, the overhead wire 200 for railways is erected above the rail R and has a trolley wire 201, a catenary overhead wire 202, and a hanger 203. The trolley line 201 is in sliding contact with the current collector boat 20 of the pantograph 10 to supply electric power to the vehicle 1. The overhead wire 202 is erected above the trolley wire 201 so that the fluctuation of the static height of the trolley wire 201 is small, and is provided so as to suspend the trolley wire 201 via a hanger 203 extending in a substantially vertical direction. .. Further, the overhead wire 202 is fixed to the overhead wire pillar (not shown) at predetermined intervals. For example, when the overhead wire 200 is erected above the rail R for the Shinkansen, the overhead wire 202 is fixed to the overhead wire pillar at intervals of about 50 m, and the hanger 203 is placed in the erection direction of the trolley wire 201 and the overhead wire 202. On the other hand, it is provided at intervals of about 5 m.

As described above, the current collector boat 20 of the pantograph 10 is usually pressed against the trolley wire 201 so as to be in contact with the trolley wire 201 from below (FIG. 2A). However, the overhead wire 200 may swing significantly in the horizontal direction orthogonal to the train traveling direction due to the influence of an earthquake or the like. When the magnitude of the runout becomes larger than the width of the current collector boat 20, or when the magnitude of the runout approaches the width of the current collector boat 20, the current collector boat 20 pushes up the trolley line 201 in the direction of travel of the train. As a result of pushing away in the orthogonal horizontal direction, as shown in FIG. 2B, the trolley wire 201 may slip under the current collector boat 20 (hereinafter referred to as “interruption”). If the vehicle 1 continues to travel in a state where such an interruption occurs, the current collector boat 20 and the hanger 203 may collide with each other, and both the pantograph 10 and the hanger 203 may be damaged. Further, the damaged pantograph 10 may involve the trolley wire 201, which may lead to a wide range of damage to the overhead wire 200 including the disconnection of the trolley wire 201. Further, when the pantograph 10 and the overhead wire 200 are damaged in this way, the time required for these facilities to be restored (hereinafter referred to as “downtime”) increases.

In order to suppress equipment damage caused by interruptions, it is necessary to lower the pantograph, for example, when an earthquake occurs, thereby suppressing the occurrence of interruptions. The descent operation of the pantograph needs to be performed promptly in order to suppress the occurrence of interrupts more appropriately, and it is desirable that the descent operation is automatically controlled when an earthquake is detected.

Patent Document 1 discloses a configuration for automatically lowering the pantograph when the current collector boat of the pantograph detects an overload. According to Patent Document 1, when an external force exceeding the detected load is applied, for example, due to a collision of a flying object with a current collector boat of the pantograph, the stopper of the piston provided on the cylinder is released, thereby lowering the pantograph. Can be done.

Further, in Patent Document 2, for example, when an excessive force acts on a pantograph current collector boat or a framework supporting the current collector boat due to an abnormality of an overhead wire or a collision of a flying object, a balance bar constituting the framework is provided. A configuration is disclosed in which the pantograph is urgently lowered by breaking the mounting pin that supports the pantograph.

Further, Patent Document 3 discloses a configuration in which a pin provided at a connecting portion of an upper frame or a lower frame constituting the frame of a pantograph is sheared and broken when a large load is applied to the current collector boat. .. By breaking the pin in this way, the support point of the balance bar of the pantograph is lost, the framework collapses backward in the traveling direction and separates from the overhead wire, and it is possible to prevent the overhead wire from being cut or the insulator from being broken.

Japanese Unexamined Patent Publication No. 2007-236104 Japanese Unexamined Patent Publication No. 2007-189754 Japanese Unexamined Patent Publication No. 2005-6390

However, the configurations disclosed in Patent Documents 1 to 3 described above are based on the assumption that the current collector is overloaded due to an abnormality in the overhead wire or a flying object, and the idea of lowering the pantograph in the event of an earthquake is the idea. Not done.

Further, in the configuration disclosed in Patent Documents 1 to 3 described above, when an excessive load is applied to the pantograph, that is, when the pantograph is actually damaged, the pantograph is immediately lowered. , It does not predict that the pantograph will be damaged and suppress the damage in advance. That is, the downtime of the equipment increases.

The present invention has been made in view of the above circumstances, and an object of the present invention is to suppress the occurrence of interrupts and reduce downtime by lowering the pantograph when an earthquake occurs.

The present invention, which solves the above problems, is an elevating system for a pantograph for a railroad vehicle, which includes an information detection device for acquiring information on the occurrence of an earthquake and a push -up device for raising and lowering the pantograph. Has a main push-up mechanism that raises and lowers the pantograph in a normal state and an emergency descent mechanism that makes the pantograph urgently descend in an emergency . The pantograph is separated from the overhead wire erected above the rail by the emergency descent mechanism , the main push-up mechanism and the emergency descent mechanism have an air cylinder, and the pressure receiving area of the air cylinder constituting the emergency descent mechanism is It is characterized in that it is larger than the pressure receiving area of the air cylinder constituting the main push-up mechanism .

According to the present invention, when the information detection device acquires the earthquake occurrence information, the push-up device is operated to lower the pantograph, so that the overhead wire and the pantograph are at least separated from each other, so that the overhead wire enters below the pantograph. That is, it is possible to suppress the occurrence of an interrupt.

Furthermore, by adopting such a pantograph elevating system, it is possible to improve the damage reduction performance in the event of an earthquake and reduce the downtime of the equipment.

INDUSTRIAL APPLICABILITY The present invention is a pantograph lifting system for rail vehicles, which comprises an information detection device for acquiring information on the occurrence of an earthquake and a pushing device for raising and lowering the pantograph. The information detection device is driven when the information on the occurrence of an earthquake is acquired, and separates the overhead wire erected above the rail from the pantograph. The push-up device has an air cylinder, and the air cylinder is inside. It has an intake hole for supplying gas to the air and an exhaust hole for discharging gas from the inside, and the opening area of the exhaust hole in an emergency is larger than the opening area of the exhaust hole in a normal time. Is also characterized by being large.

The information detection device may be configured to detect the occurrence of an earthquake by detecting the stoppage of power supply to the pantograph.
The present invention from another viewpoint is an elevating system for a pantograph for a railroad vehicle, which includes an information detection device for acquiring information on the occurrence of an earthquake and a push-up device for raising and lowering the pantograph. The information detection device is driven when the information on the occurrence of an earthquake is acquired, and separates the overhead wire erected above the rail from the pantograph, and the information detection device detects that the power supply to the pantograph is stopped. It is characterized by detecting the occurrence of an earthquake by doing so.

According to the present invention, it is possible to suppress the occurrence of interrupts and reduce downtime by lowering the pantograph when an earthquake occurs.

It is explanatory drawing which shows the outline of the structure of the overhead wire schematically. It is explanatory drawing which showed the outline of the positional relationship between a pantograph and an overhead wire schematically. It is explanatory drawing which shows the outline of the structure of the elevating system which concerns on 1st Embodiment. It is explanatory drawing which shows the outline of the structure of the air cylinder schematically. It is explanatory drawing which shows the elevating operation by the elevating system schematically. It is a flow chart which showed the emergency operation of a vehicle at the time of an earthquake. It is explanatory drawing which shows the outline of the structure of the modification of the air cylinder schematically. It is explanatory drawing which shows the outline of the structure of the elevating system which concerns on 2nd Embodiment. It is explanatory drawing which shows the outline of the structure of the modification of the air cylinder as an emergency descent mechanism schematically.

Hereinafter, the present embodiment of the present invention will be described with reference to the drawings. In the present specification, elements having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

<Structure of pantograph 10>
First, the configuration of the pantograph 10 according to the present embodiment will be described. FIG. 3 is an explanatory diagram showing an outline of the configuration of the pantograph 10. In the following description, the pantograph 10 will be described by exemplifying a case where the framework 30 described later has a single-arm spring-lifting pantograph configuration. Further, in the following description, a case where the vehicle 1 is a Shinkansen will be described as an example.

As shown in FIGS. 2 and 3, the pantograph 10 is provided on the upper ceiling surface of the vehicle 1, and includes a current collector boat 20 that is in sliding contact with the trolley wire 201, and a framework 30 having a pantograph mechanism that supports the current collector boat 20. have. The current collector boat 20 comes into contact with the trolley wire 201 from below when the framework 30 rises due to the operation of the push-up device 50 described later, and in this state, an electric current is passed through the trolley wire 201 to supply electric power to the vehicle 1. Will be supplied.

In the current collector boat 20, a boat body 21 that is slidably contacted with the trolley line 201 and can collect current is connected to the framework 30 via a ceiling pipe 22 and a boat support 24. Further, the boat body 21 has a sliding plate 21a that is in sliding contact with the trolley wire 201, and a sliding plate support portion 21b that supports the sliding plate 21a from below. Furthermore, at the longitudinal end of the ground plate 21a and the ground plate support portion 21b, that is, the end in the direction orthogonal to the trolley wire 201, the sliding plate 21a is slid against the sliding plate 21a to prevent interruption of the trolley wire 201. A horn 21c that extends the tangent portion downward is formed.

An elastic member 23 such as a coil spring is provided between the boat body 21 and the ceiling pipe 22 in a substantially vertical direction. The current collector boat 20 is configured to swing in a substantially vertical direction due to the elastic restoring force of the elastic member 23. For example, even if the trolley wire 201 is displaced in the vertical direction, the trolley wire 201 follows the displacement. It is possible to slide in contact with.

The framework 30 constitutes a link mechanism for vertically displaceably supporting the current collector boat 20 by means of an upper frame 31, a lower frame 32, a balancing rod 33, and a balance rod 34. The upper frame 31 and the lower frame 32 support the current collector boat 20. That is, one end 31a of the upper frame 31 is connected to the boat support 24 of the current collector boat 20, and one end 32a of the lower frame 32 is rotatably connected to the other end 31b side. Further, the other end 32b of the lower frame 32 is rotatably connected to the first connecting portion 35 fixed to the ceiling surface of the vehicle 1.

As shown in FIG. 3, an intersection angle θ1 is formed between the upper frame 31 and the lower frame 32, and an elevating angle θ2 is formed between the lower frame 32 and the vehicle 1. The pantograph 10 can move the current collector boat 20 up and down in a substantially vertical direction by changing the crossing angle θ1 and the elevating angle θ2 by the operation of the push-up device 50 described later. The details of the raising and lowering operation of the pantograph 10 will be described later.

The balancing rods 33 are provided side by side with the lower frame 32, one end 33a is connected to the other end 31b of the upper frame 31, and the other end 33b is rotatably connected to the second connecting portion 36. The balancing rod 33 has a link structure that is displaced integrally with the elevating operation of the lower frame 32, and the elevating locus of the current collector boat 20 is adjusted by setting the length of the balancing rod 33. can do. That is, the vertical direction of the current collector boat 20 can be adjusted by the action of the balance rod 33.

The balance rods 34 are provided side by side with the upper frame 31, one end 34a is connected to the boat support 24, and the other end 34b is connected to the lower frame 32. The balance rod 34 has a link structure that is displaced integrally with the elevating operation of the upper frame 31, and the current collector boat 20 is provided by the balance rod 34 and the boat support 24 regardless of the size of the crossing angle θ1. The posture of the current collector is kept constant, and the upper surface of the current collector boat 20 can be kept horizontal.

<Structure of the elevating system 40 according to the first embodiment>
Next, the configuration of the elevating system 40 for elevating and lowering the pantograph 10 configured as described above will be described. The elevating system 40 includes a push-up device 50, an information detection device 60, and a control device 70.

The push-up device 50 can adjust the elevating angle θ2 by rotating the spindle M in the first connecting portion 35, and can perform the elevating operation of the framework 30. The push-up device 50 rotates the spindle M in the ascending direction of the framework 30 via the rotary rod 35a, for example, an elastic member 51 made of a spring and a cylinder that rotates the spindle M in the descending direction of the framework 30 via the rotary rod 35b. 52 and. In the present embodiment, the elastic member 51 and the cylinder 52 constitute a "main push-up mechanism".

The cylinder 52 is, for example, an air cylinder. FIG. 4 is an explanatory diagram schematically showing an outline of the configuration of the cylinder 52. As shown in FIG. 4, the cylinder 52 has a main body portion 52a and a head 52b.

The main body 52a has a hollow substantially cylindrical shape, and an intake hole 52c and an exhaust hole 52d are formed on a side surface or an end surface. The inside of the main body 52a is divided into an intake space and an exhaust space by a pressure receiving portion 52f described later, and compressed air or the like is supplied to the inside through the intake hole 52c to move the head 52b in the expansion / contraction direction. It is freely configured. When the head 52b moves in the extension direction due to the supply of compressed air, the air inside the exhaust space is exhausted to the outside of the main body 52a through the exhaust hole 52d.

The head 52b is configured to be movable in the expansion / contraction direction by taking in air and exhaust air inside the cylinder 52. The head 52b is connected to a pressing portion 52e that presses and rotates the rotary rod 35b and a pressure receiving portion 52f that is pressed by compressed air to move the head 52b via a shaft 52g that penetrates the main body portion 52a. .. The diameter of the pressure receiving portion 52f is configured to substantially match the inner diameter of the main body portion 52a, so that the inside of the main body portion 52a is divided into an intake space and an exhaust space.

The information detection device 60 acquires and detects earthquake occurrence information, and transmits the information to the control device 70. Further, when the control device 70 acquires the earthquake occurrence information from the information detection device 60, the control device 70 controls at least the elevating system 40 to perform an emergency operation at the time of the earthquake occurrence.

The emergency operation in the elevating system 40 is, for example, a descent operation of the pantograph 10 by operating the main push-up mechanism of the elevating system 40, thereby separating the trolley wire 201 and the current collector boat 20.

The earthquake occurrence information may be, for example, information acquired outside the vehicle 1 and may be information transmitted to the information detection device 60, or may be information directly acquired by the vehicle 1. There may be. For example, the earthquake occurrence information may be the power reception status from the trolley line 201 by the current collector boat 20. That is, for example, a power failure or a pulse is detected due to a stoppage of power transmission at a substation due to the occurrence of an earthquake, and an earthquake occurs when the current collector 20 detects a stoppage of power supply for a predetermined time (for example, about 1 second). It may be determined that it has occurred. Further, for example, the earthquake occurrence information may be the detection of shaking by the coastal seismometer of the early earthquake detection system for vehicles, or the information acquired by the earthquake detection system of the Japan Meteorological Agency. Furthermore, two or more types of seismic detection systems selected from these may be configured to be used in combination.

The information detection device 60 may be independently provided in the elevating system 40 as in the present embodiment, or may be integrally configured with the control device 70, for example.

<Up and down operation of pantograph 10>
The elevating system 40 according to the present embodiment constitutes the above-mentioned automatic descent system. Subsequently, the elevating operation of the pantograph 10 by the elevating system 40 will be described with reference to the drawings.

First, the ascending operation of the pantograph 10 by the elevating system 40, that is, the ascending operation of the current collector boat 20 will be described. When raising the pantograph 10, as shown in FIG. 5A, the elastic member 51 is connected to the spindle M via the rotary rod 35a. The elastic member 51 pulls the rotary rod 35a toward the pulling direction (right direction in FIG. 5A) of the elastic member 51, whereby the spindle M is in the ascending direction of the framework 30, that is, the direction in which the elevating angle θ2 is increased. Rotate to.

When the lower frame 32 rotates and the elevating angle θ2 increases, the upper frame 31 rotatably connected to one end 32a of the lower frame 32 is lifted upward, and the crossing angle θ1 increases. As a result, that is, the current collector boat 20 rises due to the displacement of the crossing angle θ1 and the elevating angle θ2.

At this time, the balancing rod 33 is connected to the other end 31b of the upper frame 31, and a reaction force is applied to the other end 31b of the upper frame 31 in the counterclockwise direction. The direction is kept approximately vertical. Further, the movement of the current collector boat 20 in the rotation direction is restricted by the action of the balance rod 34, and the upper surface of the current collector boat 20 is maintained horizontally.

By the above operation, the pantograph 10 rises and the current collector boat 20 comes into contact with the trolley wire 201. As a result, the vehicle 1 is in a state where it can receive power from the trolley line 201.

Subsequently, the descent operation of the pantograph 10 by the elevating system 40, that is, the descent operation of the current collector boat 20 will be described. When lowering the current collector boat 20, compressed air C is supplied to the intake space of the cylinder 52 as shown in FIG. 5 (B). As a result, the head 52b of the cylinder 52 moves in the extension direction and is pressed against the rotary rod 35b, and when the pressing force becomes larger than the elastic force in the pulling direction of the elastic member 51, the spindle M moves in the descending direction of the framework 30. That is, it rotates in the direction in which the elevating angle θ2 becomes smaller.

When the lower frame 32 rotates and the elevating angle θ2 becomes smaller, the upper frame 31 rotatably connected to one end 32a of the lower frame 32 descends, and the crossing angle θ1 becomes smaller. As a result, that is, the current collector boat 20 descends due to the displacement of the crossing angle θ1 and the elevating angle θ2.

At this time, the balancing rod 33 is connected to the other end 31b of the upper frame 31 and a reaction force is applied to the other end 31b of the upper frame 31 in the clockwise direction. Is kept approximately in the vertical direction. Further, the movement of the current collector boat 20 in the rotation direction is restricted by the action of the balance rod 34, and the upper surface of the current collector boat 20 is maintained horizontally.

By the above operation, the pantograph 10 is lowered and the current collector boat 20 is separated from the trolley line 201. Further, by separating from the current collector boat 20 trolley wire 201 in this way, it is possible to suppress the occurrence of interrupts even when the trolley wire 201 swings significantly, for example, and downtime and equipment cost can be reduced. It can be reduced.

When the pantograph 10 is transitioned from the descending state to the ascending state, the compressed air supplied to the intake space of the cylinder 52 is discharged. As a result, the pressing force of the cylinder 52 on the rotary rod 35b by the head 52b weakens, and when the elastic force in the pulling direction of the elastic member 51 becomes larger than the pressing force, the spindle M moves up and down in the frame 30. It rotates in the direction in which the angle θ2 increases.

<Flow of operation of the elevating system 40 when an earthquake occurs>
Next, the flow of emergency operation of the vehicle 1 at the time of an earthquake will be described. FIG. 6 is a flowchart showing the flow of emergency operation of the vehicle 1.

When an earthquake occurs or is predicted to occur while the vehicle 1 is traveling, the earthquake detection system first detects the occurrence information of the earthquake (step S1 in FIG. 6).

When the occurrence of an earthquake is detected and it is determined that an emergency operation is necessary due to the influence of the earthquake, the occurrence information of the earthquake is transmitted to the information detection device 60 provided in the elevating system 40 (step in FIG. 6). S2).

The case where an emergency operation is required is, for example, a case where it is determined that the rail R or the overhead wire 200 may be defective due to the earthquake, or a case where it is determined that an interruption occurs due to the influence of the earthquake. And so on.

When the information detection device 60 detects the occurrence information of the earthquake, the detection signal of the occurrence information of the earthquake is transmitted to the control device 70 (step S3 in FIG. 6).

When the control device 70 receives the signal, the control device 70 operates the main push-up mechanism of the push-up device 50 based on the signal, and the descent operation of the pantograph 10 by the elevating system 40 starts (step S4 in FIG. 6).

In the descent of the pantograph 10, compressed air is first supplied to the intake space of the cylinder 52 as described above, and the head 52b rotates the rotary rod 35b in the descent direction of the frame 30. As a result, the pantograph 10 descends through the lower frame 32 and the upper frame 31, and the current collector boat 20 is separated from the trolley line 201.

Further, when the information detection device 60 detects the occurrence information of the earthquake in step S2, the traveling speed of the vehicle 1 is acquired by the speed detection device (not shown) in parallel with the descent operation of the pantograph 10 in step S4 (FIG. Step S5 of 6.

When it is detected by step S5 that the vehicle 1 is traveling at a constant speed or higher (for example, 70 km / h or higher), the emergency brake of the vehicle 1 is activated to make the vehicle 1 emergency stop (step S6 in FIG. 6). ).

If, for example, it is detected in step S5 that the traveling speed of the vehicle 1 is traveling at a constant speed or less (for example, 70 km / h or less), the emergency brake is not activated.

According to the above operation, when the occurrence of an earthquake is detected, the current collector boat 20 of the pantograph 10 descends so as to be separated from the trolley line 201. Therefore, for example, when the trolley line 201 shakes significantly due to the shaking of the earthquake. Even if there is, it is possible to suppress the occurrence of interrupts.

Further, according to the present embodiment, the descent operation of the pantograph 10 is controlled to be performed independently of the emergency stop of the vehicle 1, that is, to perform the descent operation even when the vehicle 1 does not make an emergency stop. To. As a result, even if it is detected that the vehicle 1 is traveling at a low speed or is stopped, it is possible to appropriately suppress the occurrence of interrupts without being affected by the vehicle 1 or the traveling condition, and downtime and equipment cost can be suppressed. Can be reduced.

It is desirable that the descent operation of the pantograph 10 by the elevating system 40 according to the present embodiment is performed before the arrival of the S wave, which is considered to have a large swing motion of the trolley wire 201. In other words, it is desirable to predict the occurrence of an earthquake by detecting the P wave and start the descent operation of the current collector boat 20 before the arrival of the S wave. By performing such control, it is possible to suppress the occurrence of interrupts more appropriately.

As described above, it is desired that the descent operation of the pantograph 10 is performed as soon as possible in order to appropriately suppress the occurrence of interruption of the overhead wire. As described above, when the elevating operation is performed by the elevating system 40 using the main push-up mechanism that is also used in normal times, the descent operation of the pantograph 10 is performed relatively slowly, so that it takes time for the pantograph 10 to descend. It ends up.

Therefore, as shown in FIG. 7, in the cylinder 52, the emergency exhaust hole 52h for quickly exhausting the air in the cylinder in the event of an earthquake, the exhaust hole 52d, and the emergency exhaust hole 52h are selectively closed. A shutter 52i that can be used may be further provided. The emergency exhaust hole 52h is formed so as to have a larger opening area than, for example, the exhaust hole 52d. The shutter 52i is arranged so as to close the emergency exhaust hole 52h at normal times, and when the information detection device 60 acquires the earthquake occurrence information, the shutter 52i moves to close the exhaust hole 52d and closes the emergency exhaust hole 52h. Open.

Since the cylinder 52 has such a configuration, the air inside the cylinder 52 is discharged from the emergency exhaust hole 52h having an opening area larger than that of the exhaust hole 52d in an emergency, so that the head 52b can be expanded and contracted more quickly. can. That is, the pantograph 10 can be lowered more quickly.

The configuration of the cylinder 52 is not limited to the above configuration, and the same effect as described above can be obtained if air can be exhausted with a larger opening area than in a normal state in an emergency. That is, for example, the cylinder 52 may be provided with a plurality of exhaust holes, and in an emergency, it may be controlled to exhaust the inside of the cylinder 52 using more openings than in a normal case. Further, for example, the cylinder 52 may be provided with one exhaust hole provided with a shutter whose opening area can be arbitrarily changed, and may be controlled so as to expand the opening area by opening and closing the shutter in an emergency. In such a case, the structure of the shutter is not limited to the slide structure, and for example, a diaphragm blade type shutter may be adopted.

Further, according to the above embodiment, the elevating system 40 performs the descent operation of the pantograph 10 by operating the main push-up mechanism even in an emergency, but for example, for emergency descent of the pantograph 10 in the event of an earthquake. The push-up mechanism may be provided in the elevating system 40.

<Elevating system 400 according to the second embodiment>
Therefore, next, the configuration of the elevating system 400 provided with the "emergency descent mechanism" for emergency descent of the pantograph 10 in an emergency, that is, when the occurrence of an earthquake is detected will be described with reference to the drawings. FIG. 8 is an explanatory diagram schematically showing an outline of the configuration of the elevating system 400 according to the second embodiment. In the present embodiment, the elements having substantially the same functional configuration as the elevating system 40 are designated by the same numbers, and the description thereof will be omitted.

The elevating system 400 according to the second embodiment has a cylinder 520 as an emergency descent mechanism in addition to the configuration of the elevating system 40 according to the first embodiment. The cylinder 520 is, for example, an air cylinder, and the head 520b can be moved in the expansion / contraction direction by supplying and discharging compressed air or the like to the cylinder 520.

The cylinder 520 is installed in parallel with the main push-up mechanism, and the head 520b moves in the extension direction and is pressed against the rotary rod 35c in the same manner as the cylinder 52 of the main push-up mechanism. Then, when the pressing force becomes larger than the elastic force in the pulling direction of the elastic member 51 of the main push-up mechanism, the spindle M rotates in the descending direction of the frame 30, that is, in the direction in which the elevating angle θ2 becomes smaller, and descends the pantograph 10. Can be made to.

The cylinder 520 has a larger area for receiving compressed air than the cylinder 52, that is, has a larger cross-sectional shape than the cylinder 52. By forming the pressure receiving area large in this way, the pressing force applied in the extension direction becomes larger than that of the cylinder 52, and the rotary rod 35c can be rotated with a larger force. As a result, the pantograph 10 can be lowered more quickly than the cylinder 52 of the main push-up mechanism, and the current collector boat 20 can be separated from the trolley wire 201.

For example, the compressed air supply path to the cylinder 520 may be provided with an ignition mechanism (not shown) so that the compressed air is supplied to the inside of the cylinder 520 more quickly.

Further, as shown in FIG. 9, the opening area of the exhaust hole 520d of the cylinder 520 may be formed larger than that of, for example, the intake hole 520c. As a result, the head 520b can be expanded and contracted more quickly, that is, the pantograph 10 can be lowered more quickly.

When the information detection device 60 detects the occurrence information of the earthquake, the cylinder 520 as the emergency descent mechanism configured as described above operates in place of the operation of the cylinder 52 of the main push-up mechanism, that is, preferentially operates. It is controlled by the control device 70. That is, the operation is controlled so that the pantograph 10 can descend more quickly in the event of an earthquake. As a result, the interrupt of the trolley wire 201 can be suppressed more appropriately.

The elevating system 400 configured as described above does not have a fuse mechanism built-in. That is, even when the emergency descent operation is performed when an earthquake occurs, the pantograph 10 rises by releasing the compressed air supplied to the inside of the cylinder 520, and the emergency descent mechanism is used again. Can be done. As a result, it is not necessary to replace parts for each emergency operation, and downtime and equipment cost required for restoration can be further reduced.

However, the above configuration does not prevent the fuse mechanism (not shown) from being adopted for the elevating system 400. That is, by adopting a fuse mechanism (not shown) in the elevating system 400, the pantograph 10 may be configured to perform a more rapid descent operation.

In the above embodiments, the single-arm spring-lifting pantograph has been described as an example, but the type of pantograph to which the present invention is applied is not limited to this. For example, the present invention can be applied to any pantograph structure such as a diamond-shaped pantograph or a T-shaped pantograph as long as the current collector boat 20 can be separated from the trolley line 201 by performing a descent operation in an emergency. ..

Further, in the above embodiment, the structure of the air-lowering pantograph, that is, the pantograph that performs the lowering operation by supplying compressed air to the cylinder has been described as an example, but the air-rising pantograph, that is, the cylinder It may be applied to a pantograph that rises due to movement. In such a case, as an emergency ascending mechanism, for example, an emergency discharge means for compressed air is provided in parallel with the main push-up mechanism.

In the above description, the case where the elevating system 40 and the elevating system 400 are adopted for the vehicle 1 as a Shinkansen has been described as an example, but the elevating system 40 and the elevating system 400 are also applied to, for example, a conventional line. Can be done.

Although the preferred embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to such an example. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the ideas described in the claims, and these also naturally belong to the technical scope of the present invention. It is acknowledged that.

The present invention is useful for vehicle pantographs, especially pantographs for Shinkansen bullet trains.

1 Vehicle 10 Pantograph 20 Current collector 30 Frame 40 Elevating system 50 Pushing device 52 Cylinder 60 Information detection device 70 Control device 200 Overhead wire 201 Trolley line 400 Elevating system 520 Cylinder

Claims (4)

It is a pantograph lifting system for railway vehicles.
An information detection device that acquires earthquake occurrence information,
It has a push-up device for raising and lowering the pantograph.
The push-up device is
The main push-up mechanism that raises and lowers the pantograph in normal times,
It has an emergency descent mechanism that makes the pantograph make an emergency descent in an emergency.
When the information detection device acquires earthquake occurrence information, the overhead wire erected above the rail and the pantograph are separated by the emergency descent mechanism .
The main push-up mechanism and the emergency descent mechanism have an air cylinder.
A pantograph elevating system for a railroad vehicle, characterized in that the pressure receiving area of the air cylinder constituting the emergency descent mechanism is larger than the pressure receiving area of the air cylinder constituting the main push-up mechanism . It is a pantograph lifting system for railway vehicles.
An information detection device that acquires earthquake occurrence information,
It has a push-up device for raising and lowering the pantograph.
The push-up device is driven when the information detection device acquires earthquake occurrence information, and separates the overhead wire erected above the rail from the pantograph .
The push-up device has an air cylinder and has an air cylinder.
The air cylinder is
An intake hole for supplying gas to the inside and
It has an exhaust hole for exhausting gas from the inside,
An elevating system for a pantograph for a railroad vehicle, characterized in that the opening area of the exhaust hole in an emergency is larger than the opening area of the exhaust hole in a normal time . The lifting system for a railroad vehicle pantograph according to claim 1 or 2 , wherein the information detection device detects the occurrence of an earthquake by detecting the stoppage of power supply to the pantograph. It is a pantograph lifting system for railway vehicles.
An information detection device that acquires earthquake occurrence information,
It has a push-up device for raising and lowering the pantograph.
The push-up device is driven when the information detection device acquires earthquake occurrence information, and separates the overhead wire erected above the rail from the pantograph .
The information detection device is a pantograph elevating system for railway vehicles, characterized in that it detects the occurrence of an earthquake by detecting the stoppage of power supply to the pantograph.

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