JP7041521B2 - Railroad crossing breaker - Google Patents

Description

The present invention relates to a railroad crossing breaker.

Conventionally, in a railroad crossing breaker, a large force is required to raise the break break only by the force of the motor, so by providing a balance weight on the opposite side of the break break across the support rotation shaft of the break break, The load on the motor has been reduced by balancing the weight around the shaft. However, as a so-called "waitless cutting machine", the demand for a cutting machine that does not use a balance weight is increasing. As a technique that does not use a balance weight, for example, a method of reducing a load by using a spring force instead of the balance weight is known (see, for example, Patent Document 1). Further, there is known a technique that can be raised only by the force of a motor without mounting an auxiliary mechanism using a balance weight or a spring only when the decapitation is short (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2007-125918 Japanese Unexamined Patent Publication No. 2007-269138

However, when the decapitation is raised only by the force of the motor without a balance weight, the maximum load is applied to the motor when the decoupling is raised from the horizontal position where the deactivation angle is 0 degrees (Patent Document 1). (See FIG. 11), a large motor with a drive torque corresponding to its maximum load must be mounted.

On the other hand, in a railroad crossing breaker provided with an auxiliary mechanism using a balance weight or a spring, a load corresponding to the residual torque obtained by subtracting the auxiliary torque from the load torque is applied to the motor (see FIG. 9 of Patent Document 1). Therefore, the fluctuation of the load applied to the motor can be suppressed to a small value, but there is a limit to make it constant regardless of the angle of the decapitation. Therefore, the conventional railroad crossing breaker is equipped with a large motor having a drive torque corresponding to the assumed maximum load, and the current corresponding to the load is still supplied at the time of the maximum load.

Further, in a railroad crossing cutoff machine that does not have an auxiliary mechanism using a balance weight or a spring as in Patent Document 2, when the cutoff can be lowered, the lowering speed is accelerated as the cutoff is closer to horizontal. Therefore, it is necessary to use a motor as a generator to control the brakes so that the decapitation does not drop rapidly and consume the generated electric energy, so a large motor must also be installed here.

From the standpoint of the manufacturer or user of the railroad crossing breaker, an energy-saving railroad crossing breaker with a small capacity of the mounted motor and a small motor current is desirable. In addition, when a large motor is installed, the length of the railroad crossing breaker in the track crossing direction (outer dimension in the depth direction) becomes large, and the installation site is required for that amount, so the length in the track crossing direction is required. A thin railroad crossing breaker with a short length is desired.

The present invention has been made in view of such a background, and an object of the present invention is to provide a technique for realizing a thin railroad crossing cutoff machine capable of downsizing or reducing power consumption of a mounted motor.

The first invention for solving the above-mentioned problems has a holder for attaching a breaker on one end side, an electric motor on the other end side, and an intermediate portion between the one end and the other end. A swinging arm that can swing up and down around the breaking rotation axis by being pivotally supported by the breaking rotation axis.
A weight mounting bar connected to the other end side of the swing arm portion so as to swing up and down so as to change the angle formed with respect to the swing arm portion by the electric motor.
The first torque for rotating the breaking rotation shaft in the direction of lowering the one end side and the second torque for rotating the breaking rotation shaft in the direction of lowering the other end side. It is a crossing cutoff machine provided with an elevating control device for controlling the elevating and lowering of the decapitation by controlling the rotation of the electric motor so that one of the torque balances is superior to the other.

The second invention includes a rotation sensor for detecting the angle formed by the rotation sensor and a brake for stopping the rotation of the breaking rotation shaft, and the elevating control device applies the brake based on the detection result of the rotation sensor. It is a crossing breaker of the first invention to operate.

A third aspect of the invention is a railroad crossing breaker according to the first or second invention, which comprises a brake unit for braking the electric motor, and the elevating control device operates the brake unit when the elevating / lowering control device is completed. ..

A fourth aspect of the invention is a railroad crossing breaker according to any one of the first to third inventions, which comprises a stopper for limiting the further rotation of the breakthrough beyond the descent completion position by the first torque in the descent direction. Is.

According to a fifth aspect of the present invention, the elevating control device rotates and controls the electric motor so that the first torque becomes superior to the second torque in the descent complete state of the railroad crossing. It is a railroad crossing cutoff machine of any of the inventions.

A sixth aspect of the present invention is the first to fifth aspects in which the elevating control device rotates and controls the electric motor so that the second torque becomes superior to the first torque in the ascending state of the railroad crossing. It is a railroad crossing cutoff machine of any of the inventions.

According to the first invention, the balance between the first torque and the second torque can be adjusted by changing the relative distance between the breaking rotation shaft and the weight attached to the weight mounting bar. When both torques are balanced, the element related to the decapitation connected to one end side of the swing arm and the element related to the weight mounting bar (and thus the weight) connected to the other end side are decapitated. With the rotation axis as the fulcrum, it becomes a balanced "yajirobe" state, and the swing arm can be swung with a slight force. That is, by slightly shifting the position of the weight, it is possible to raise and lower the decapitation, and it is difficult to apply a large load to the electric motor. Therefore, it is possible to realize a railroad crossing cutoff machine that is more compact and consumes less energy than the conventional one by making the mounted electric motor smaller than the conventional one.

According to the second invention, it is possible to maintain a state in which the decapitation reaches a predetermined ascending / descending completion position.

According to the third invention, the angle formed by the swing arm portion and the weight mounting bar can be fixed. Therefore, it is possible to more reliably maintain the state in which the decapitation reaches the predetermined ascending / descending completion position.

According to the fourth invention, a physical restriction can be provided at the descent completion position of the decapitation.

According to the fifth aspect of the invention, even if an attempt is made to lift the decapitation that has completed the descent, it can be prevented from being easily lifted.

According to the sixth invention, even if an external force such as wind pressure acts on the decapitation that has completed the ascent, the decapitation can be easily prevented from starting to descend.

Internal structure diagram seen from the track crossing direction showing a configuration example of a railroad crossing breaker. The rear view which shows the configuration example of a railroad crossing breaker. The figure (1) for demonstrating the operation of raising a railroad crossing breaker. The figure (2) for demonstrating the operation of raising a railroad crossing breaker. The figure (3) for demonstrating the operation of raising a railroad crossing breaker. The figure (1) for demonstrating the operation of lowering a railroad crossing breaker. The figure (2) for demonstrating the operation of lowering a railroad crossing breaker. The figure (3) for demonstrating the operation of lowering a railroad crossing breaker.

FIG. 1 is an internal structural diagram seen from a track crossing direction showing a configuration example of a railroad crossing breaker according to the present embodiment, and shows a descent complete state in which the railroad crossing breaker is lowered. FIG. 2 is a view seen from the right side of FIG. 1, and is a rear view of the railroad crossing breaker. It should be noted that the illustration of electrical wiring related to signals, power supply, etc. is omitted.

The railroad crossing cutoff machine 10 is
1) The housing 11 erected on the concrete pedestal 4 and
2) A shearing rotation shaft 20 provided on the upper part of the housing 11 along the track crossing direction (left-right direction for the housing), and
3) The brake 22 that stops the rotation of the decapitation rotation shaft 20 and
4) A rotation sensor 24 that detects the rotation of the decapitation rotation shaft 20 and
5) A swinging arm portion 30 pivotally supported by a breaking rotation shaft 20 and
6) A shearing can 32 and its mounting holder 34 provided on one end side (lower side in FIG. 1) of the swing arm portion 30.
7) An electric motor 40 and a deceleration mechanism 42 provided on the other end side (upper side in FIG. 1) of the swing arm portion 30.
8) The drive shaft 46, which is the output shaft of the deceleration mechanism 42,
9) A weight mounting bar 52 fixed to the drive shaft 46 on the side near the drive shaft 46 and a weight 50 mounted on the far end side far from the drive shaft 46.
10) Elevating control device 90 and
11) A cover portion 13 (not shown in FIG. 2) provided on the back side of the railroad crossing cutoff machine 10 so as to cover the swing range of the weight 50 and the weight mounting bar 52.
12) A stopper 15 that restricts the further rotation of the decapitation 32 that exceeds the descent completion position in the descent direction, and
To prepare for.

The breaking rotation shaft 20 is pivotally supported with respect to the housing 11 so as to be freely rotatable.

The brake 22 is a braking device whose operation is controlled by the elevating control device 90, and is in a non-braking state when no power is applied.

The rotation sensor 24 detects the rotation angle of the breaking rotation shaft 20 and outputs a signal corresponding to the detected rotation angle to the elevating control device 90. In the present embodiment, a magnetic hollow encoder is used, but the form of the sensor is not limited to this.

The swing arm portion 30 is a member created by bending, and has a rectangular shape in a side view (see FIG. 1) and a downward U-shape in a rear view (see FIG. 2). ). The swing arm portion 30 has a shearing can 32 and its mounting holder 34 on one end side, and has an electric motor 40, a reduction mechanism 42, a weight mounting bar 52, and a weight 50 on the other end side, and has one end portion. By being pivotally supported by the shearing rotation shaft 20 at the intermediate portion between the other end portion, they can be integrally swung up and down around the shearing rotation shaft 20.

More specifically, in any process between the descent completed state and the ascending completed state, the shearing is always on the front side (front side (left side when facing FIG. 1)) with the shearing rotation axis 20 as the boundary. The swing arm portion 30 can swing up and down around the breaking rotation shaft 20 so that there is an element related to 32 and an element related to the weight 50 on the rear side (back side (right side when facing FIG. 1)). It is supported.

The electric motor 40 is a motor that is driven and controlled by the elevating control device 90, and will be described as having a built-in brake unit that brakes the motor. In the electric motor 40, the output shaft becomes rotation-free in a non-energized state (for example, at the time of a power failure), and the braking state of the built-in brake unit is turned off. The brake unit may be separated from the electric motor 40 to be a brake unit whose operation is controlled by the elevating control device 90. For example, a gear that rotates integrally with the drive shaft 46 is provided, and a locking mechanism is provided by a solenoid that inserts a locking portion between the teeth of the gear when energized and pulls back the locking portion when the power is off to bring it into a non-engaged state. The brake part such as is conceivable.

The reduction mechanism 42 decelerates the rotation of the output shaft of the electric motor 40 and outputs the rotation to the drive shaft 46.

The drive shaft 46 is pivotally supported along the track crossing direction on the other end side of the swing arm portion 30, the upper end portion side as shown in FIG.

The elevating control device 90 controls the drive of the electric motor 40 and the built-in brake unit of the electric motor 40 based on the rotation angle of the breaking rotation shaft 20 detected by the rotation sensor 24 and the crossing control signal input externally. It is an electronic electric circuit that controls the operation of the brake 22 and the operation of the brake 22.

Next, the operation of the railroad crossing cutoff machine 10 of the present embodiment will be described.
3 to 5 are explanatory views when the breaking can 32 operates from the descent completed state, which is the predetermined breaking position, to the ascending completed state, which is the predetermined ascending position. The cover portion 13 is not shown.

First, the descent completion state will be described in detail.
When the rotation angle detected by the rotation sensor 24 is within the angle range determined to be in the predetermined descent completed state, the elevating control device 90 determines that the railroad crossing breaker 10 is in the descent completed state. When it is determined that the descent is completed, the elevating control device 90 controls the electric motor 40 to be stopped and the built-in brake unit to be ON (braking state) to maintain that state. As a result, the angle formed by the swing arm portion 30 and the weight mounting bar 52 in the descent completed state is maintained so that the first torque T1 is slightly larger than the second torque T2 (see FIG. 3). As shown in FIG. 3, the first torque T1 is a torque that attempts to rotate the shearing rotation shaft 20 in a direction that lowers the side of the breaking shear 32, and the second torque T2 is a shearing rotation. It is a torque that tries to rotate the shaft 20 in the direction of lowering the side of the weight 50.

Further, the elevating control device 90 controls to keep the brake 22 ON (braking state) while it is determined that the descent is completed. Therefore, even if an attempt is made to lift the shearing pin 32 in the breaking position, it can be easily lifted from the two points of the action of the brake 22 and the fact that the first torque T1 is in a superior state to the second torque T2. There is no such thing. On the contrary, even if an attempt is made to push down the breaking can 32 by leaning against the breaking can 32 in the breaking position, the action of the brake 22 prevents it. Even if the breaking can 32 tries to push down further beyond the braking force of the brake 22, the swinging arm portion 30 abuts on the stopper 15 projecting from the housing 11, and the breaking can 32 is in the descent completion position. It is physically restricted to go down further in the descent direction beyond the above.

When the railroad crossing cutoff machine 10 in the descent completed state receives a command signal to release the cutoff from the outside, as shown in FIG. 3, the elevating control device 90 first turns off the built-in brake portion of the electric motor 40. In the non-braking state, the drive control is started in the direction of increasing the angle formed by the weight mounting bar 52 and the swing arm portion 30 (circle number "1" in FIG. 3).

By the drive control, the drive shaft 46 is driven counterclockwise as referred to in FIG. 3, and the weight mounting bar 52 is relatively swung upward (circle number “2” in FIG. 3). Then, the distance between the weight 50 and the breaking rotation shaft 20 in the horizontal direction increases, and the second torque T2 increases. Then, when the timing at which the first torque T1 and the second torque T2 are predicted to antagonize and balance is reached (specifically, a predetermined time after the predetermined drive start; 3 "), the elevating control device 90 turns off the brake 22 to put it in a non-braking state (circle number "4" in FIG. 3).

Since the start of the drive control, the elevating control device 90 has continued to drive the electric motor 40, and the second torque T2 has also continued to increase. As shown in FIG. 4, when the second torque T2 eventually exceeds the first torque T1 (circle number "5" in FIG. 4), the decapitation 32 begins to rise (circle number "5" in FIG. 4). 6 ").

As the breaker 32 rises, the swing arm portion 30 also rotates in conjunction with it. As a result, the weight 50 moves relatively downward from the position in the descent completed state, and the distance between the weight 50 and the breaking rotation shaft 20 in the horizontal direction tends to decrease. That is, the first torque T1 and the second torque T2 try to antagonize and balance again.
However, since the elevating control device 90 continues to drive the electric motor 40, the angle formed by the weight mounting bar 52 and the swing arm portion 30 continues to increase, and the second torque T2 continues to dominate. Will be done. That is, the cutoff 32 continues to rise.

When the decapitation 32 continues to rise, as shown in FIG. 5, the climbing completion position is reached, and the rotation angle detected by the rotation sensor 24 reaches a predetermined range recognized as the climbing completion state (in FIG. 5). The circle number "7").

When the rotation angle of the breaking rotation shaft 20 reaches the predetermined range, the elevating control device 90 turns on the brake 22 and starts braking (circle number "8" in FIG. 5) to drive the electric motor 40. At the same time as stopping, the built-in brake unit is turned on to start braking (circle number "9" in FIG. 5). As a result, the railroad crossing cutoff machine 10 is in the ascending state of the railroad crossing cutoff 32.

After the braking of the brake 22 is started, the drive of the electric motor 40 is stopped and the braking of the built-in brake portion is started with a slight delay, so that the second torque T2 is superior to the first torque T1 in the ascending complete state. It will be maintained. Therefore, even if an external force (for example, wind pressure) for lowering the decapitation 32 acts, the braking action of the brake 22 and the maintenance of the second torque T2 in a predominant state make it easy. It is designed not to go down.

6 to 8 are diagrams for explaining the operation of the breaking can 32 from the ascending completed state to the descending completed state. The cover portion 13 is not shown.

When the railroad crossing cutoff machine 10 in the ascending completed state receives a command signal to execute the cutoff from the outside, as shown in FIG. 6, the elevating control device 90 first turns off the built-in brake unit of the electric motor 40. In the non-braking state, the drive control is started in the direction of reducing the angle formed by the weight mounting bar 52 and the swing arm portion 30 (circle number "1" in FIG. 6).

By the drive control, the drive shaft 46 is driven clockwise as referred to in FIG. 6, and the weight mounting bar 52 is relatively swung downward (circle number “2” in FIG. 6). Then, the distance between the weight 50 and the breaking rotation shaft 20 in the horizontal direction decreases, and the second torque T2 begins to decrease. Then, when the timing at which the first torque T1 and the second torque T2 are predicted to antagonize and balance is reached (specifically, after a second predetermined time has elapsed from the predetermined drive start; in FIG. 6). The round number “3”) and the elevating control device 90 turn off the brake 22 to put it in a non-braking state (round number “4” in FIG. 6).

Since the start of the drive control, the elevating control device 90 has continued to drive the electric motor 40, and the second torque T2 has also continued to decrease. As shown in FIG. 7, when the second torque T2 eventually falls below the first torque T1 (circle number "5" in FIG. 7), the decapitation 32 begins to descend (circle number "5" in FIG. 7). 6 ").

The swing arm portion 30 also rotates in conjunction with the descent of the decapitation 32. As a result, the weight 50 moves relatively upward from the position in the ascending completed state, and the distance between the weight 50 and the breaking rotation shaft 20 in the horizontal direction tends to increase. That is, the first torque T1 and the second torque T2 try to antagonize and balance again.
However, since the elevating control device 90 continues to drive the electric motor 40, the angle formed by the weight mounting bar 52 and the swing arm portion 30 continues to decrease, and the first torque T1 continues to dominate. Will be done. That is, the decapitation 32 continues to descend.

When the decapitation 32 continues to descend, as shown in FIG. 8, the descent complete position is reached, and the rotation angle detected by the rotation sensor 24 reaches a predetermined range recognized as the descent complete state (in FIG. 8). The circle number "7").

When the rotation angle of the breaking rotation shaft 20 reaches the predetermined range, the elevating control device 90 turns on the brake 22 and starts braking (circle number "8" in FIG. 8) to drive the electric motor 40. At the same time as stopping, the built-in brake unit is turned on to start braking (circle number "9" in FIG. 8). As a result, the railroad crossing cutoff machine 10 has returned to the descent complete state of the railroad crossing cutoff 32.

After the braking of the brake 22 is started, the drive of the electric motor 40 is stopped and the braking of the built-in brake portion is started with a slight delay, so that the first torque T1 is superior to the second torque T2 in the descent completed state. It will be maintained.

As described above, according to the present embodiment, the shearing can 32 can be raised and lowered while adjusting the balance between the first torque T1 and the second torque T2. When both torques are balanced, the element related to the shearing can 32 connected to one end side of the swing arm portion 30 and the element related to the weight 50 connected to the other end side are the elements related to the shearing rotation shaft 20. With the fulcrum as a fulcrum, a balanced "yajirobe" state is reached, and the swing arm portion 30 can be swung with a slight force. That is, by gradually changing the angle formed by the weight mounting bar 52 and the swing arm portion 30 and gradually changing the distance between the weight 50 and the shearing rotation shaft 20 in the horizontal direction, the shearing can 32 is raised and lowered. It is possible to make it. The load applied to the electric motor 40 can be small. Therefore, the mounted electric motor 40 can be made smaller or consume less power than the conventional one, and the railroad crossing cutoff machine 10 which is compact and has a power saving effect can be realized.

Further, the rocking surface of the weight 50 and the weight mounting bar 52 is a vertical surface that is the same as or parallel to the rocking surface of the breaking can 32 and intersects the track crossing direction. Therefore, it is possible to realize the railroad crossing cutoff machine 10 in a thin shape with a short length in the track crossing direction (direction from the back to the front in FIG. 1), and the land for installing the railroad crossing cutoff machine 10 can be reduced.

[Modification example]
Although an example of the embodiment of the present invention has been described above, the embodiment to which the present invention can be applied is not limited to the above, and components can be added, omitted, or changed as appropriate.

4 ... Concrete pedestal 10 ... Cross-cutting machine 11 ... Housing 13 ... Cover 15 ... Stopper 20 ... Shaking rotation shaft 22 ... Brake 24 ... Rotation sensor 30 ... Swing arm 34 ... Mounting holder 40 ... Electric motor 42 ... Deceleration Mechanism 46 ... Drive shaft 50 ... Weight 52 ... Weight mounting bar 90 ... Elevation control device T1 ... 1st torque T2 ... 2nd torque

Claims (3)

It has a holder for mounting the decapitation on one end side, an electric motor on the other end side, and is pivotally supported by the decapitation rotation shaft at the intermediate portion between the one end and the other end. A swinging arm that can swing up and down around the decapitation rotation axis,
A weight mounting bar connected to the other end side of the swing arm portion so as to swing up and down so as to change the angle formed with respect to the swing arm portion by the electric motor.
The brake that stops the rotation of the decapitation rotation shaft and
The first torque for rotating the breaking rotation shaft in the direction of lowering the one end side and the second torque for rotating the breaking rotation shaft in the direction of lowering the other end side. By controlling the rotation of the electric motor in the first rotation direction so that the first torque is superior to the second torque , the decapitation is lowered, and the second torque is the first torque. An elevating control device that controls to raise the decapitation by controlling the rotation of the electric motor in the second rotation direction so as to be more dominant .
Equipped with
The descent complete state is a state in which the decapitation is in the descent complete position and the brake is applied at an angle at which the first torque is predominant over the second torque.
The ascending complete state is a state in which the decapitation is in the ascending complete position and the brake is applied at an angle at which the second torque is more dominant than the first torque.
The elevating control device is
When operating from the descent completed state to the ascending completed state, after starting the control of gradually changing the angle formed by starting the rotation of the electric motor in the second rotation direction, the first torque and the said. The brake is released at a predetermined timing when the second torque reaches a predetermined balance state, and the rotation of the electric motor is stopped when the decapitation reaches the ascending completion position by continuing the rotation of the electric motor. Apply the brake to
When operating from the ascending completed state to the descending completed state, after starting the control of gradually changing the angle formed by starting the rotation of the electric motor in the first rotation direction, the first torque and the said. The brake is released at a predetermined timing when the second torque reaches a predetermined balance state, and the rotation of the electric motor is stopped when the decapitation reaches the descent completion position by continuing the rotation of the electric motor. Applying the brake,
Railroad crossing cutoff machine. A brake unit for braking the electric motor is provided.
The elevating control device operates the brake unit when the elevating and lowering of the decapitation is completed.
The railroad crossing cutoff machine according to claim 1 . A stopper that limits the further rotation of the decapitation beyond the descent completion position by the first torque in the descent direction.
The railroad crossing cutoff machine according to claim 1 or 2 .

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