JP3830184B2 - Mast lock mechanism of direct acting pantograph device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mast lock mechanism for a direct-acting pantograph device that vertically moves a current collecting boat attached to a mast by a lift cylinder device.
[0002]
[Prior art]
A general structure of a pantograph device for supplying electric power from an overhead wire to a vehicle is as shown in Japanese Patent Application Laid-Open No. 62-68002 and Japanese Patent Application Laid-Open No. 63-92202. The current collector boat provided at the top of the body is brought into contact with and separated from the overhead line. For the purpose of reducing aerodynamic noise, one mast provided with the current collector boat is vertically moved by a lift cylinder. A direct-acting pantograph device that can be moved up and down has been proposed.
[0003]
[Problems to be solved by the invention]
The linear motion pantograph device stands up the pantograph device, and in this state, the mast is extended by the lift cylinder to bring the current collecting boat body sliding plate provided on the mast into contact with the overhead wire, and power is supplied from the overhead wire. .
[0004]
However, if the mast is not maintained in an upright state with sufficient strength against the air resistance and impact force applied by the section section, etc., as the vehicle travels, the pantograph will be separated and the vehicle will be disconnected. There is a risk that it will not be able to fully perform its function, such as being unable to pass the power required by the.
[0005]
Also, even if a lock mechanism is provided to maintain the standing state of the mast,
It is necessary to prevent the mast from being lowered due to malfunction or the like, and when a lock mechanism is further provided, the operation of other mechanisms should not be hindered.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the mast lock mechanism according to the present invention is a linear motion in which a base is rotatably supported on a frame, a mast is provided on the base so as to be movable up and down, and a current collector boat body is attached to the mast. In the pantograph device , the direct-acting pantograph device is a mast-locking mechanism for a direct-acting pantograph device in which a mast-locking mechanism for maintaining the standing state of the mast between the base frame and the base is provided. An open / close valve is provided in the middle of the pipe for supplying air to the extension side chamber, and this open / close valve is opened in conjunction with the locking operation of the mast lock cylinder.
[0007]
In the mast lock mechanism , a mast lock cylinder is provided on a base frame, an engagement portion for engaging a rod of the mast lock cylinder is provided on a base, and the mast lock cylinder has the same compressed air source as a lift cylinder that lifts and lowers the mast. It shall be operated by air from
[0008]
In addition, the pipe line leading to the lift side chamber of the lift cylinder forms a closed circuit, a pilot valve is provided in the closed circuit, and the pilot valve is opened by air supplied to the pipe line leading to the compression side chamber of the lift cylinder. I made it.
[0009]
It is also possible to connect a pipe line connected to the lift pipe of the lift cylinder until the mast stands up to the lock release side chamber of the mast lock cylinder, and to return the rod once before locking.
[0010]
Further, a pipe that forms a closed circuit is connected to the lock side chamber of the mast lock cylinder by a mast standing detection valve, and a pilot valve is provided in the pipe that forms this closed circuit, and this pilot valve is connected to the compression side chamber of the lift cylinder. You may make it open with the air supplied to the pipe line which leads to.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a side view of a linear motion pantograph device to which a mast lock mechanism according to the present invention is applied.
2 is an enlarged side view of the mast portion shown in FIG. 1, FIG. 3R> 3 is an enlarged plan view of the mast lock mechanism according to the present invention, FIG. 4 is a perspective view of the base, and FIGS. It is an air control circuit diagram which shows.
[0012]
First, the structure of the linear motion pantograph device will be described with reference to FIGS. The direct-acting pantograph device is attached to a vehicle roof by insulating a frame 1 via an insulator 2, and supports one end of a base 4 on a horizontal shaft 3 supported by the frame 1 so as to be rotatable. A mast 5 is provided on the base 4.
[0013]
A lever 6 is attached to the base 4, and a pair of mast raising / lowering cylinders 7 that are operated by air are disposed between the lever 6 and the frame 1, and further between the lever 6 and the frame 1. A hydraulic damper 8 is disposed substantially parallel to the mast raising cylinder 7 to absorb shocks at the mast standing position and the falling position.
[0014]
In addition, by compressing the mast raising cylinder 7, the mast 5 falls to the imaginary line position in the figure, and by extending the mast raising cylinder 7, the mast 5 stands up to the vertical position shown by the solid line in the figure. Further, the mast extends in the direction of the arrow in a lift cylinder described later.
[0015]
As shown in FIG. 2, the mast 5 is provided with a lift cylinder 9 that is operated by air on a base 4 that is rotatably supported at one end by a horizontal shaft 3, and a slider 10 is disposed outside the lift cylinder 9. The upper end of the slider 10 and the upper end of the rod of the lift cylinder 9 are coupled via a housing 11 so that the slider 10 moves up and down as the lift cylinder 9 expands and contracts. A spring 12 is provided on the outside of the upper part of the lift cylinder 9 to alleviate the impact at the time of maximum compression.
[0016]
The slider 10 is disposed in a main pipe 13, and a plurality of guide rollers 14 are attached to the main pipe 13, and the guide roller 14 guides the slider 10 to move up and down and prevents the slider 10 from rotating. ing.
[0017]
A guide 15 is attached to the inside of the concave portion provided in the central portion of the housing 11, and a cylindrical body 16 having an upper end closed is slidably inserted inside the guide 15, and the lower end is inserted into the cylindrical body 16 with the lift cylinder. A high-frequency absorbing spring 17 supported by the upper end of the rod 9 is disposed, and a top plate 18 is fixed to the upper end of the cylinder 16, and a lid that prevents intrusion of dust or the like into the pantograph device on the top plate 18. A current collecting boat body 20 is provided on the top plate 18 to take in current in contact with the overhead wire. A current from an overhead line (not shown) flows through a sliding plate provided in the current collector boat 20.
[0018]
Further, an inner cover 21 supported on the base 1 side is disposed outside the main pipe 13, and an outer cover 22 that moves up and down with the expansion and contraction of the lift cylinder 9 is disposed outside the inner cover 21. Is arranged.
[0019]
An arm 23 for locking the mast 5 in the tilted position, a storage lock cylinder 24 for operating the arm 23, and an upright detection valve 25 for detecting that the mast 5 has stood up are provided on the underframe 1. A mast lock mechanism 30 according to the present invention is provided adjacent to the other end of 4.
[0020]
As shown in FIG. 3, the mast lock mechanism 30 includes a pair of left and right mast lock cylinders 31, 31. The rod 32 of the mast lock cylinder 31 is slidably held in a guide portion 34 via a joint 33. The lock pin 35 is connected.
[0021]
The lock pin 35 engages with the engagement hole 4a of the base 4 (the mast is in a standing state in this state) rotated to the horizontal position as shown in FIG. Retract to the indicated position.
[0022]
Next, the air control circuit of the direct acting pantograph device will be described with reference to FIGS. Here, FIG. 5 is an air control circuit diagram showing the stowed state of the mast, FIG. 6 is an air control circuit diagram showing the standing state, and FIG. 7 is an air control circuit diagram showing the extended state.
[0023]
In the figure, L1 is a first ascending line L1, and air is supplied to the first ascending line L1 via a switching valve 41 on the downstream side of the regulator 40. The first ascending line L1 A buffer tank 42 is provided, and an electromagnetic valve 43 is connected to the tank 42 so that the pressure in the tank 42 is released to the atmosphere in a short time.
[0024]
The main pipeline of the first rising pipeline L1 passes through the insulator 2 and is connected to the standing side chamber (lower chamber) 7a of the mast raising cylinder 7 and the unlocking side chamber (lower chamber) of the storage lock cylinder 24. 24a is connected.
[0025]
Further, the second ascending pipeline L2 is branched from the middle of the first ascending pipeline L1. The second ascending pipeline L2 passes through the shaft 3 and is connected to the ascending chamber 9a of the lift cylinder 9 via the on-off valve 44. The second ascending line L2 is connected to the unlocking side chamber 45a of the slider lock cylinder 45. Further, this line extends and branches in the middle and is connected to the pilot valve 46. 9 is connected to a rise detection device 47 and a fall detection device 48.
[0026]
Further, the third ascending line L3 branches from the middle of the second ascending line L2, and the rising detection valve 25 is provided in the middle of the third ascending line L3. The branched pipe L3a of L3 is connected to the lock side chamber 31a of the mast lock cylinder 31, and the pipe L3b is connected to the pilot valve 49.
[0027]
Further, when the standing detection valve 25 moves in the non-detecting direction from the standing detection valve 25, the pipe L3c communicating with the ascending pipe L3 is branched, and this pipe L3c is connected to the mast lock cylinder 31 via the shuttle valve 50. It is connected to the lock release side chamber 31b.
[0028]
On the other hand, a storage line L4 is provided on the downstream side of the regulator 40 via a switching valve 51. The storage pipe L4 passes through the insulator 2 and is connected to a fall side chamber (upper chamber) 7b of the mast raising cylinder 7.
[0029]
Further, the descending pipeline L5 is branched from the middle of the storage pipeline L4. The descending pipeline L5 is connected to the descending chamber 9b of the lift cylinder 9 and the lock chamber (upper chamber) 45b of the slider lock cylinder 45, and the branch pipeline L5a from the descending pipeline L5 is connected to the pilot valve 46. .
[0030]
Further, the detection pipeline L6 is branched from the middle of the storage pipeline L4 toward the fall side chamber (upper chamber) 7b of the mast raising cylinder 7. A storage detection valve 52 is provided in the middle of the detection pipe L6, and the detection pipe L6 passes through the insulator 2 and a storage detection device 53 is connected to the end thereof.
[0030]
A pipe L7 branches off from the middle of the storage pipe L4, and this pipe L7 is connected to the lock release side chamber 31b of the mast lock cylinder 31 via the shuttle valve 50.
Further, a branch pipe L7a from the pipe L7 is connected to the pilot valve 49.
[0031]
The operation of the air control circuit having the above configuration will be described below. First, in order to change the mast storage state shown in FIG. 5 to the mast standing state shown in FIG. 6, the switching valve 51 connected to the storage pipe L4 is closed and the switching valve 41 connected to the first ascending pipe L1 is opened. To do.
[0032]
Then, air is supplied to the lock release side chamber 24 a of the storage lock cylinder 24, the engagement state between the hook of the storage lock cylinder 24 and the base 4 is released, and the base 4 can rotate about the shaft 3. Then, in this state, air is supplied to the standing side chamber (lower chamber) 7a of the mast raising cylinder 7 and the mast raising cylinder 7 extends, whereby the base 4 rotates about the shaft 3 and the mast 5 Stand up. This state is shown in FIG.
[0033]
Further, until the mast 5 stands up (the base 4 becomes horizontal), the standing detection valve 25 is in the closed position, the third ascending pipeline L3 and the pipeline L3c communicate with each other, the pipeline L3c and the shuttle valve Air is supplied to the lock release side chamber 31b of the mast lock cylinder 31 via 50, and the lock pin 35 is in the retracted position.
[0034]
When the mast 5 stands up (the base 4 becomes horizontal), this is detected by the standing detection valve 25, and the standing detection valve 25 is in the open position. When the rising detection valve 25 is opened, air is supplied to the lock side chamber 31a of the mast lock cylinder 31 via the third ascending pipeline L3, and the lock pin 35 moves forward to engage the engagement hole of the base 4 4a is engaged, and simultaneously with this engagement, the on / off valve 44 is pushed by the lock pin 35 to open the on / off valve 44.
[0035]
When the on-off valve 44 is opened, air is supplied to the lock release side chamber 45a of the slider lock cylinder 45, the locked state between the hook and the mast 5 is released, and the mast 5 can be raised. And in this state, the extension side chamber (lower chamber) 9a air of the lift cylinder 9 is supplied,
As the lift cylinder 9 extends, the mast 5 rises as shown in FIG. 7, and the current collector boat 20 contacts the overhead wire. Note that whether or not the lift cylinder 9 has been extended is detected by the rise detection device 47.
[0036]
Here, even when the on-off valve 44 is in the closed position for some reason when the mast 5 is in the extended state, the current circuit boat 20 is lowered by the mast 5 contracting according to the air circuit according to the present invention. There is no. That is, the mast 5 is not contracted because the conduit that leads to the expansion side chamber of the lift cylinder 9 forms a closed circuit with the on-off valve 44 closed.
[0037]
On the other hand, in order to return the mast 5 from the state shown in FIG. 7 to the housed state in FIG. 5, the switching valve 41 is first set to the atmospheric release position. Open the air inside.
[0038]
When the extension side chamber (lower chamber) 9a of the lift cylinder 9 communicates with the atmosphere, the mast to which the current collecting boat body 20 is attached descends (shrinks) by its own weight. When the lowering detecting device 48 detects that the lowering to the predetermined position, the switching valve 51 is opened and air is supplied to the storage pipe L4. The air supplied to the storage line L4 enters the compression side chamber 9b of the lift cylinder 9 via the down line L5, and reliably lowers the slider of the mast 5 to the lowest point, and also locks the chamber 45b of the slider lock cylinder 45. Air is supplied to the hook, and the hook is locked to the mast. Since the on-off valve 44 is closed and a residual pressure remains between the ascent detection valve 48 and the lift cylinder 9a chamber, the pilot valve 46 is opened via the descending pipeline L5 and the pipeline L5a, and the residual pressure is released to the atmosphere. The air is exhausted in communication with.
[0039]
Air supplied to the storage pipe L4 is supplied to the lock release side chamber 31b of the mast lock cylinder 31 via the pipe L7 and the shuttle valve 50, and at the same time, the pilot valve 49 is opened via the pipe L7a. As a result, the lock side chamber 31a of the mast lock cylinder 31 is opened to the atmosphere, so that the lock pin 35 is retracted and the base 4 can be rotated.
[0040]
By the way, even if the standing detection valve 25 rises due to a malfunction and air is supplied to the unlocking side chamber 31b via the pipe L3c, in this case, the lock side chamber 31a and the pipes L3a and L3b form a closed circuit. Therefore, the lock pin 35 does not retract.
[0041]
The air supplied to the storage line L4 is supplied to the fall side chamber 7b of the mast raising cylinder 7. Then, the rod of the mast raising cylinder 7 is retracted, the base 4 rotates about the shaft 3, and finally the storage detection valve 52 is opened at the storage position. When the storage detection valve 52 is opened, the storage detection device 53 detects this. Then, the storage switching valve 51 is switched to the atmosphere release side, and the air in the storage pipeline L4 is released to the atmosphere.
[0042]
[0043]
【The invention's effect】
As described above, according to the present invention, a direct-acting pantograph device in which a base is rotatably supported on a frame, a mast is provided on the base so as to be movable up and down, and a current collecting boat body is attached to the mast. In this case, an opening / closing valve is provided in the middle of a pipeline for supplying air to the extension side chamber of the lift cylinder, and this opening / closing valve is opened in conjunction with the locking operation of the mast lock cylinder. An on-off valve is provided in the middle of the pipe supplying the gas, and the on-off valve is opened in conjunction with the locking operation of the mast lock cylinder, and a pipe that leads to the extension side chamber of the lift cylinder with the on-off valve closed. By forming a closed circuit, the mast can be kept standing even if the rod of the lock cylinder is retracted due to a malfunction during pantograph operation (in contact with the overhead wire). A pilot valve is provided in the closed circuit, and the pilot valve is opened with air supplied to a pipe line that leads to the compression side chamber of the lift cylinder so as to communicate with the atmosphere, so that the residual pressure in the lift cylinder can be released. it can.
[0044]
In addition, by connecting a pipe connected to the lift cylinder's rising pipe until the mast stands up to the lock release side chamber of the mast lock cylinder, the rod can be returned once before the lock operation starts, and the base and mast It is possible to reliably prevent the lock cylinder rod from interfering with the rotation of the base.
[0045]
Furthermore, a pipe that forms a closed circuit is connected to the lock side chamber of the mast lock cylinder when the standing detection valve of the mast is in a closed position, and a pilot valve is provided in the pipe that forms this closed circuit,
If this pilot valve is opened by air supplied to the pipe line leading to the compression side chamber of the lift cylinder, the rod of the mast lock cylinder can be prevented from moving backward even if the standing detection valve malfunctions. .
[Brief description of the drawings]
FIG. 1 is a side view of a linear motion pantograph device to which a mast lock mechanism according to the present invention is applied. FIG. 2 is an enlarged side view of the mast portion shown in FIG. Fig. 4 is a perspective view of the base. Fig. 5 is an air control circuit diagram showing the stowed state of the mast. Fig. 6 is an air control circuit diagram showing the standing state of the mast. Fig. 7 is an air control showing the extended state of the mast. Circuit diagram [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Underframe, 3 ... Horizontal axis, 4 ... Base, 4a ... Engagement hole, 5 ... Mast, 6 ... Lever, 7 ... Mast raising cylinder, 9 ... Lift cylinder, 20 ... Current collector boat body, 25 ... Standing up Detection valve, 30 ... mast lock mechanism, 31 ... mast lock cylinder, 35 ... lock pin, 44 ... open / close valve, 46,49 ... pilot valve, 50 ... shuttle valve, L1-L7 ... air line.

Claims (5)

  A direct-acting pantograph device in which a base is rotatably supported on a base frame, a mast is provided on the base so as to be movable up and down, and a current collecting boat body is attached to the mast. A mast lock mechanism of a direct acting pantograph device provided with a mast lock mechanism for maintaining the standing state of the mast between the base and the base. A mast lock mechanism for a direct acting pantograph device, wherein the open / close valve is opened in conjunction with a locking operation of a mast lock cylinder. The mast lock mechanism of the direct-acting pantograph device according to claim 1, wherein the mast lock mechanism is provided with a mast lock cylinder on a frame, and an engagement portion that engages with a rod of the mast lock cylinder is provided on a base. Further, the mast lock cylinder is actuated by air from the same compressed air source as the lift cylinder that lifts and lowers the mast.   In the mast lock mechanism of the direct acting pantograph device according to claim 1, the pipe line leading to the expansion side chamber of the lift cylinder in a state where the on-off valve is closed forms a closed circuit, and a pilot valve is provided in the closed circuit, A mast lock mechanism for a direct acting pantograph device, wherein the pilot valve is opened by air supplied to a pipe line leading to a compression side chamber of a lift cylinder.   3. The mast lock mechanism of the direct acting pantograph device according to claim 2, wherein a pipe line connected to the lift pipe of the lift cylinder is connected to the unlocking side chamber of the mast lock cylinder until the mast rises. A mast-lock mechanism in a direct-acting pantograph device.   3. A mast lock mechanism of a direct acting pantograph device according to claim 2, wherein a pipe line forming a closed circuit is connected to the lock side chamber of the mast lock cylinder by a mast standing detection valve to form the closed circuit. A mast lock mechanism for a direct acting pantograph device, characterized in that a pilot valve is provided in a pipe line, and the pilot valve is opened by air supplied to a pipe line leading to a compression side chamber of a lift cylinder.

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