JP4079437B2 - Railroad crossing breaker - Google Patents

Description

  The present invention relates to a railroad crossing breaker and, more particularly, to a transmission means and a control means for rotational motion necessary for raising and lowering a barrier rod.

  FIG. 5 is a block diagram showing a level crossing breaker 20 which is installed on a railroad crossing road and is equipped with a blocking bar 30 for swinging the blocking bar 30 from horizontal to vertical for opening and closing the level crossing. Therefore, the railroad crossing breaker 20 includes a barrier rod holding portion 29 for holding the barrier rod 30, a motor 25 capable of bidirectional rotation, and a motor 25 for swinging the barrier rod 30 for raising and lowering. A rotary transmission unit 27 that transmits the rotary motion of the motor 25 to the barrier rod holding unit 29, and a control unit 21 that controls the rotary motion of the motor 25 according to the train entry signal TER received from the external railroad crossing control device 11. Yes.

  Among them, the rotation transmission unit 27 includes a rotation shaft that supports the breaking rod holding portion 29 in a swingable manner, a rotation / swing conversion mechanism that transmits the rotational motion of the motor 25 to the rotation shaft, and a cantilever state of the breaking rod 30. And a balancer 28 for reducing the load-side rotational force that is undesirably applied to the rotating shaft from the barrier rod holding portion 29. Conventionally (see, for example, Patent Document 1), weights and springs are employed for the balancer 28, and the rotation / oscillation conversion mechanism of the rotation transmission unit 27 is a reduction gear mechanism that combines large and small spur gears, or a ball screw mechanism. A combination mechanism with a linear-oscillation conversion link mechanism has been employed.

  The motor 25 is usually provided with a rotation detector 26 such as an optical rotary encoder in order to detect its rotation state, for example, position information. Further, the rotation control of the motor 25 is performed by feedback control based on the detection signal, and the lifting / lowering operation of the blocking rod 30 can be flexibly and stably performed according to the setting in the setting unit 24 using the control. Specifically, the lowering time, the rising time, the lowering stop position, and the rising stop position of the blocking rod 30 can be set (see, for example, Patent Document 2). In addition, it is also known that the motor drive current is detected to perform the jump control while descending and the unwinding control while climbing (for example, see Patent Document 3). Conventionally, in such motor rotation control by the control unit 21, there is a difference between whether the target position is changed or fixed not only when the shut-off rod 30 is raised or lowered, but a current is supplied to the motor 25 or The motor 25 was continuously driven in a flowable state.

  Such a control unit 21 is roughly divided into a control logic circuit 22 that performs processing of the train entry signal TER and a motor drive circuit 23 that outputs a motor drive current and directly drives the motor 25. Each circuit operates with a standard power supply voltage DC24V (for example, a DC voltage of 24V) supplied from the external power supply device 12. Conventionally, the transmission line of the train entry signal TER extending to the railroad crossing control device 11 and the control unit 21 and the power supply line of the standard power supply voltage DC 24V extending to the power supply device 12 and the control unit 21 are the common multi-core cable 13 and the junction box. 14 was routed through 14 etc., but other power feeding was not performed because it was not necessary for the control unit 21 and the like.

JP 2002-154433 A JP 2002-160635 A JP 2002-160634 A

However, such a conventional level crossing breaker incorporates or is combined with a balancer that tends to be larger than the motor in terms of weight and shape, whether it is a weight method or a weightless method using a spring. For this reason, it is difficult to reduce the weight and size.
If the balancer is simply omitted to reduce the weight, an undesired load-side rotational force acting on the rotating shaft of the rotating transmission part, which is caused by an unbalance caused by the load moment corresponding to the weight of the cantilevered interrupting rod Rotational force is the largest when the breaking rod is lowered and leveled, but this load side turning force is not attenuated at all. The drive side rotational force on the shaft must be strengthened.

In order to respond to this, it is necessary to increase the power, that is, to increase the drive capacity of the motor, and if this is implemented in a straightforward and general manner, for example, the motor will be increased in size and adapted to it. This is because a current-corresponding power supply line is additionally wired, which is contrary to the purpose of weight reduction.
Therefore, it is important to devise the mechanical structure and electric circuit of the crossing breaker so that the balancer can be omitted in order to reduce the weight, and the enlargement of the motor can be avoided.
In addition, it is a further technical problem to add a device that eliminates the need for additional wiring of the feeder line.

  The railroad crossing breaker of the present invention (Solution 1) was invented in order to solve such a problem, and includes a barrier rod holding portion for holding the barrier rod, a bidirectionally rotatable motor, A rotary transmission unit having a rotary shaft that supports the barrier rod holding unit so as to swing and a rotary swing conversion mechanism that transmits the rotary motion of the motor to the rotary shaft, and the motor according to a train entry signal received And a control unit for controlling the rotational motion of the rotary transmission, a belt speed reduction mechanism is included in the rotational oscillation conversion mechanism of the rotational transmission unit, and a standard power supply voltage and an additional power supply voltage higher than the standard power supply voltage are provided. A control logic circuit that is supplied to the control unit and that processes the train entry signal in the control unit operates at the standard power supply voltage, and a motor drive circuit that directly drives the motor in the control unit With additional power supply voltage By making it, the driving side rotational force from the motor to the rotating shaft exceeds the load side rotational force from the blocking rod holding part to the rotating shaft based on the cantilever state of the blocking rod. Is.

  Further, the railroad crossing breaker of the present invention (solution means 2) is the railroad crossing breaker of the above solution means 1, and instead of eliminating the balancer, a lower limit stopper is provided and the motor is activated when the barrier rod is lowered to the limit position. The drive is stopped. Specifically, the blocking rod holding portion for holding the blocking rod, a motor capable of bidirectional rotation, a rotating shaft that supports the blocking rod holding portion in a swingable manner, and the rotational movement of the motor on the rotating shaft A rotation transmission part having a rotation oscillation conversion mechanism for transmitting the rotation and a balancer for reducing the load side rotational force from the breaking bar holding part to the rotating shaft based on the cantilever state of the blocking bar, and the train entry signal received And a control unit for controlling the rotational movement of the motor in response to the rotation of the rotary shaft at the lower limit position of the barrier bar instead of the balancer of the rotary transmission unit. A lower limit stopper is provided to stop at the contact, and the rotation oscillation conversion mechanism of the rotation transmission unit includes a belt speed reduction mechanism, and the control unit is supplied with a standard power supply voltage and added higher than that. Supply voltage is also available The control unit that operates at the standard power supply voltage includes a control logic circuit that processes the train input signal, and the control unit that operates at the additional power supply voltage. Includes a motor drive circuit that directly drives the motor, and stops the drive of the motor when the control unit lowers the blocking bar to the lower limit position. .

  Further, the railroad crossing breaker according to the present invention is (the solution means 3), the railroad crossing breaker of the above solution means 1 and 2, wherein the train incoming signal transmission line, the standard power supply voltage feed line, and the additional power supply voltage The feeder line is connected to the external device through a common multi-core cable.

  In such a railroad crossing breaker of the present invention (Solution 1), since the driving side rotational force exceeds the load side rotational force based on the cantilever state of the barrier rod, the balancer can be omitted. The barrier can be raised and lowered. In addition, when the driving side rotational force is strengthened, the rotation of the motor is prevented from being enlarged by including a belt speed reduction mechanism in the rotation / oscillation conversion mechanism and increasing the driving voltage of the motor. The belt speed reduction mechanism has a relatively small inertia load and a moderately large speed reduction ratio, so it can output a large torque at a speed sufficient for swinging of the barrier when combined with a motor that is small and non-powerful and has a high voltage. Can do.

Furthermore, when supplying such relatively large power to the motor, an additional power supply voltage for the motor drive circuit is introduced separately from the standard power supply voltage for the control logic circuit, and this additional power supply voltage is derived from the standard power supply voltage. By making it high, it is possible to increase the power supply without increasing the current value of the feeder line. Therefore, it is possible to use the same power supply wire used for the standard power supply voltage and the train incoming signal transmission line as the additional power supply voltage power supply line. If an unused unused wire remains in the multicore cable bundled with the train incoming signal transmission line, the additional wiring of the power supply line becomes unnecessary by assigning it to the power supply line of the additional power supply voltage.
Therefore, according to the present invention, it is possible to realize a lightweight railroad crossing breaker without a balancer.

Further, in the railroad crossing breaker according to the present invention (solution 2), a lower limit stopper for mechanical contact is provided instead of eliminating the balancer, and the driving of the motor is stopped at the lower limit position. Thus, when the blocking rod is lowered to the limit position, the blocking rod contacts the lower limit stopper and is mechanically stopped, and the reaction force stably remains at the lower limit position. In addition, since it is not necessary to supply drive current to the motor at the point where the load moment / load side rotational force is the largest for the control unit, it is possible to avoid an excessive increase in power consumption even without a balancer. .
Therefore, according to the present invention, it is possible to realize a lightweight railroad crossing breaker that has no balancer and does not consume much power.

Furthermore, in the railroad crossing breaker of the present invention (Solution 3), as described above, the additional power supply voltage is made higher than the standard power supply voltage, so that the power supply for the standard power supply voltage and the transmission of the train incoming signal can be reduced. Based on the fact that it can be used for additional power supply voltage feeders, it remains in the multicore cables already installed to wire standard power supply voltage feeders and train incoming signal transmission lines. By using unused wires as feeders for additional power supply voltage, it can be installed at railroad crossings by connecting both ends of the wires considerably more easily without tedious additional wiring with cable laying. can do.
Therefore, according to the present invention, it is possible to realize a lightweight railroad crossing breaker having no balancer and easy to install.

  About such a railroad crossing breaker 40 of the present invention, a specific form for carrying out this will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic structure of a railroad crossing breaker 40, FIG. 2 shows a mechanical structure of the railroad crossing barrier 40 with a barrier bar 30 lowered horizontally, and FIG. FIG. 2 and FIG. 3 show the mechanical structure of the breaking machine 40 in a state where the breaking bar 30 is raised vertically, and both of FIG. 2 and FIG. 3 show the inside by vertically cutting the frame part 42 and the lid part 43. The left view of what was exposed, (b) is a front view of what exposed the inside by cutting the lid part 43 vertically.

  Further, FIG. 4 is a flowchart of the control for raising and lowering the barrier rod by the control logic circuit 52. In the illustration, for the sake of simplicity, fasteners such as bolts, coupling tools such as hinges, detailed electronic circuits, internal wiring, etc. are omitted from the illustration, The illustrations are mainly related. In addition, since the same reference numerals are given to the same components as those in the prior art in the illustration, the repeated description will be omitted, and the following description will focus on differences from the prior art.

  The railroad crossing breaker 40 is different from the conventional railroad crossing barrier 20 (see FIG. 1) in that a number of wires bundled in the multi-core cable 13 that are unused and empty are fed with an additional power supply voltage of AC 200V. And the control logic circuit 22 in the control unit 51 in place of the control unit 21 includes the detector 72 and the lower limit detector 72 and the upper limit detector 73 are introduced instead. 73, and a control logic circuit 52 using the control unit 21, and the motor drive circuit 23 operating at the standard power supply voltage DC24V in the control unit 21 is replaced by a motor drive circuit 53 operating at the additional power supply voltage AC200V. The rotation transmission unit 27 is a rotation transmission unit 60 in which the gear reduction mechanism 61 and the belt reduction mechanism 62 are combined, and the balancer 28 is eliminated and the lower limit stop is used instead. 70 is the point which has been introduced.

  The multi-core cable 13 connects the railroad crossing breaker 40 installed near the railroad crossing to the railroad crossing control device 11 and the power supply device 12 installed away from the railroad crossing for power feeding and signal transmission. In the railway field, about 12 wires with a current capacity of 6.6 mA are usually bundled. One or a pair of wires of the multi-core cable 13 is selected as a transmission line for the train entry signal TER, one end of which is connected to the railroad crossing control device 11 via an appropriate extension wire, and the other end is It is connected to the control logic circuit 52 via the connection box 14 or the like. Another pair of the wires of the multi-core cable 13 is selected as a power supply line for the standard power supply voltage DC24V, one end of which is connected to the power supply device 12 through an appropriate extension wire or the like, and the other end is connected box 14 or the like. To the control logic circuit 52. Further, another pair is selected as a power supply line for the additional power supply voltage AC200V, one end of which is connected to the power supply device 12 by an appropriate extension wire or the like, and the other end is connected to the motor drive circuit 53 via the connection box 14 or the like. Has been.

  The additional power supply voltage AC200V is an AC voltage of 200V, for example, and when the power supply device 12 outputs it, the connection is made as described above. Although illustration is omitted, when the power supply device 12 does not output the additional power supply voltage AC200V, another power supply capable of outputting the additional power supply voltage AC200V sufficiently higher than the standard power supply voltage DC24V is added, and the multicore A control unit 51 is connected via the cable 13. In any case, the control unit 51 of the railroad crossing breaker 40 and the external device via the multicore cable 13 in which the transmission line of the train incoming signal TER, the power supply line of the standard power supply voltage DC24V, and the power supply line of the additional power supply voltage AC200V are shared. 11 and 12 are connected.

If the motor 25 is a servo motor or the like, it will continue to be used with the rotation detector 26, but if not, it will not be a large motor but a small bi-directionally rotatable motor with a driving voltage. The one whose rotational speed can be increased by increasing the voltage or the like is adopted. The rotational speed of the motor 25 is not essential, but is preferably 900 revolutions per minute or more.
Since the motor drive circuit 53 of the control unit 51 may be a commercially available servo controller or the like, the illustration of the internal circuit is omitted, but in short, the drive current necessary for the direct drive of the motor 25 is supplied under the supply of the additional power supply voltage AC200V. It is only necessary to be able to generate the data according to the control signal received from the control logic circuit 52. Three-phase driving in the switching method is frequently used, but other driving methods may be used.

  The rotation transmission unit 60 (see FIGS. 2 and 3) includes a rotation shaft 66 that supports the above-described blocking rod holding unit 29 in a swingable manner, and a rotation swing that transmits the rotational motion of the motor 25 to the rotation shaft 66. The gear speed reduction mechanism 61 and the belt speed reduction mechanism 62 as the conversion mechanism, the lower limit stopper 70 that stops the rotation of the rotary shaft 66 by mechanical contact at the lower limit position of the blocking rod 30, and the rocking that contacts and separates from the lower limit stopper 70. A moving arm 71 is provided. Among them, the belt speed reduction mechanism 62 is stretched over a drive pulley 63 attached to the output shaft tip of the gear speed reduction mechanism 61, a driven pulley 65 attached to one end of the rotary shaft 66, and both drive pulleys 63, 65. Belt 64.

  These, including a later-described control logic circuit 52, are attached to a frame portion 42 fixed to the upper end of a column 41 standing on the ground. Among them, the motor 25, the lower limit stopper 70, and the like are housed in the frame portion 42, but the belt speed reduction mechanism 62 and the like are covered by the lid portion 43 outside the frame portion 42 in order to facilitate belt replacement. The other end of the rotating shaft 66 protrudes outward from the frame portion 42, and a blocking rod holding portion 29 for detachably holding the blocking rod 30 is attached thereto.

The gear reduction mechanism 61 is composed of, for example, a planetary gear mechanism or the like, is attached to the frame portion 42 in a state of being directly connected to the motor 25, transmits the rotation from the motor 25 to the drive pulley 63, and at that time the rotation speed is 30 to 30. Decelerate to about 1/35.
The belt 64 is made of, for example, a resin-made timing belt that is lightweight and does not require lubrication, and corresponds to the ratio between the diameter of the driving pulley 63 and the diameter of the driven pulley 65, and the rotational speed between the pulleys is 6 to 7 minutes. Decelerate to about 1 In order not to impair the lightness of the belt 64, the driven pulley 65 having a large diameter is made by scraping off the meat.

  The rotary shaft 66 is held horizontally by the frame portion 42 with an appropriate bearing interposed therebetween, and the total reduction ratio in the gear reduction mechanism 61 and the belt reduction mechanism 62 is about 210 to 220/220. When it rotates 50 to 55, the blocking rod holding portion 29 and thus the blocking rod 30 is swung by 90 °. As described above, since the motor 25 rotates at a high speed, even if the reduction ratio is large, the swing, that is, the lifting / lowering operation of the blocking rod 30 is performed in an appropriate time of about 4 seconds in one way.

The lower limit stopper 70 is fixedly attached to the frame portion 42, and a buffer member such as a spring is incorporated in the contact portion in order to reduce the impact when the swing arm 71 contacts.
The swing arm 71 has a base end attached to the rotary shaft 66 and a tip that swings along with the rotation of the rotary shaft 66. When the blocking rod 30 is lowered to the lower limit position, The front end is in contact with the lower limit stopper 70 and is mechanically stopped.
In order to detect this, a lower limit detector 72 composed of, for example, a limit switch is provided at the position where the swing arm 71 comes when the blocking bar 30 is lowered to the lower limit position. An upper limit detector 73 made of a limit switch, for example, is provided at the position where the swing arm 71 comes when it is raised.

  The control logic circuit 52 of the control unit 51 is connected to the power supply line of the standard power supply voltage DC24V as in the conventional case, and the control logic circuit 52 operates at the standard power supply voltage DC24V. The control logic circuit 52 processes the train entry signal TER received from the railroad crossing control device 11 via the multi-core cable 13 and the connection box 14, and according to this, rotates the motor 25 via the motor drive circuit 53. As long as it can be controlled, for example, a relay circuit or a microprocessor application system may be used, the illustration of a specific internal circuit is omitted, but the train entry signal TER, the lowering detection signal SW2 of the lower limit detector 72, and the rising detection signal of the upper limit detector 73 SW3 is input to generate a control signal to the motor drive circuit 53.

  That is, (see FIG. 4), the control logic circuit 52 controls the motor rotation to lower the barrier rod 30 when the train entry signal TER changes from the OFF state to the ON state with the barrier rod 30 raised (step S11). (Step S12), waits for the descent detection signal SW2 to change from the OFF state to the ON state (step S13), ends the shut-off descent control (step S14), and further stops the driving of the motor 25. (Step S15). As described above, the control logic circuit 52 stops the driving of the motor 25 when the blocking rod 30 is lowered to the lower limit position, and the motor driving current is transferred from the motor driving circuit 53 to the motor 25 in the driving stopped state. Is not supplied, and it is left to the reaction force of the lower limit stopper 70 to keep the cantilevered breaking rod 30 horizontal against a large load moment and load side rotational force.

  In addition, when the train entry signal TER changes from the ON state to the OFF state while the barrier rod 30 is lowered (step S21), the control logic circuit 52 causes the motor drive circuit 53 to drive the motor 25 that has been stopped. The motor rotation control is started so that the motor drive current is supplied from the motor drive circuit 53 to the motor 25 and the barrier rod 30 is raised (step S23). Then, after waiting for the rise detection signal SW3 to be turned from the OFF state to the ON state (step S24), the interrupting rod raising control is finished (step S25). As described above, the control logic circuit 52 does not stop the driving of the motor 25 when there is almost no load moment / load-side rotational force when the blocking rod 30 is raised to the ascent limit position.

  About the level crossing cutting machine 40 of this embodiment, the use aspect and operation | movement are demonstrated referring drawings. FIG. 1 shows the connection state of the power supply line to the railroad crossing breaker 40, FIG. 2 shows the state of the railroad crossing barrier 40 when the barrier bar 30 is lowered horizontally, and FIG. The state of the railroad crossing breaker 40 when it is raised vertically is shown, and FIG. 4 shows the procedure of the control for raising and lowering the barge according to the train entry signal TER.

  When a level crossing is newly provided, the multi-core cable 13 is newly laid together with the installation of the level crossing breaker 40. In this case, the level crossing breaker 40 is erected on the side of the level crossing, and the level crossing breaker is installed. 40 is connected to the external railroad crossing control device 11 and the power supply device 12 through the multi-core cable 13 and the connection box 14 as described above. The unused wires of the multicore cable 13 are connected to the connection box 14 or the like as a wire end fixing process when laying the cable, but are not connected to a railroad crossing breaker or an external device. A new barrier rod 30 is usually attached to the barrier rod holder 29 of the railroad crossing breaker 40.

  On the other hand, when the existing old railroad crossing breaker 20 is replaced with a new railroad crossing barrier 40, the multicore cable 13 can be re-laid or separated by utilizing the unused wires of the multicore cable 13 that has already been laid. The additional laying of cables can be avoided. That is, after the railroad crossing breaker 40 is erected on the side of the railroad crossing instead of the railroad crossing barrier 20, the train incoming signal TER transmission line and the standard power supply voltage DC24V feed line are connected to the control unit 51 on the railroad crossing barrier 40 side. The existing wiring can be used as it is on the external devices 11 and 12 side. Further, among the wires of the multicore cable 13, any pair of unused unused wires fixed to the connection box 14 is selected as a power supply line for the additional power supply voltage AC 200 V, and one end thereof is used as an extension wire or the like. Are connected to the motor drive circuit 53, and the other end is connected to the output terminal of the additional power supply voltage AC200V of the power supply device 12 by another extension wire or the like. A barrier rod 30 removed from the railroad crossing breaker 20 is usually attached to the barrier rod holding part 29 of the railroad crossing barrier 40.

  In the railroad crossing breaker 40 thus installed at the railroad crossing, the control logic circuit 52 operates under the standard power supply voltage DC24V, and the motor drive circuit 53 and the motor 25 under the additional power supply voltage AC200V higher than that. Works. When the train entry signal TER sent from the level crossing control device 11 to the control logic circuit 52 is changed from the OFF state of the level crossing to the ON state of the level crossing, the control logic circuit 52 performs a series of barge descent control ( 4 (see steps S11 to S15 in FIG. 4), the motor drive circuit 53 according to this rotates the motor 25, and the motor 25 rotates at high speed. The rotational motion is decelerated by the gear speed reduction mechanism 61 and the belt speed reduction mechanism 62, and then a gentle 90 ° swinging motion of the blocking rod holding portion 29, the blocking rod 30 and the swinging arm 71 via the rotation shaft 66. Converted.

  When the shut-off rod 30 is leveled, the power consumption of the motor 25 and the motor drive circuit 53 becomes maximum, for example, about 400 W. However, since the additional power supply voltage AC200V is as high as 200V, the current of the power supply line is about 2A. However, the current capacity is not exceeded. When the blocking bar 30 becomes horizontal and the tip of the swing arm 71 approaches or lightly contacts the lower limit stopper 70, the lower limit detector 72 is activated and the lowering detection signal SW2 is turned on. Thus, the driving of the motor 25 is stopped. In this state, the motor 25 and the motor drive circuit 53 do not consume power, and the swing arm 71 contacts the lower limit stopper 70 and stops further swinging. Accordingly, the blocking bar 30 is kept horizontal (see FIG. 2). In this way, the level crossing closing operation is appropriately performed even in the lightweight level crossing breaker 40.

  When the train entry signal TER sent from the level crossing control device 11 to the control logic circuit 52 changes from the ON state of the level crossing to the OFF state of the level crossing closing, the control logic circuit 52 performs a series of interruptions including the start of motor driving. Ascending control is performed (refer to steps S21 to S25 in FIG. 4), and the motor drive circuit 53 according to the control is driven to rotate the motor 25, so that the motor 25 rotates at high speed in the opposite direction. The rotational motion is also decelerated by the gear speed reduction mechanism 61 and the belt speed reduction mechanism 62, and then a gentle 90 ° swinging motion of the blocking rod holding portion 29, the blocking rod 30 and the swinging arm 71 via the rotation shaft 66. Is converted to

  Eventually, when the blocking bar 30 becomes vertical, the lower limit detector 72 responds to the tip of the swinging arm 71 that has swung, and the rise detection signal SW3 is turned on. In this state, the motor 25 and the motor drive circuit 53 consume almost no power, and the position control by the control logic circuit 52 is easy to be stabilized. Therefore, the drive of the motor 25 is continued without stopping and the target position is fixed. By the motor control, the blocking bar 30 is maintained vertically (see FIG. 3). In this way, the step-incision operation is also appropriately performed.

[Others]
In the above embodiment, the lifting / lowering speed of the barrier rod is not mentioned, but for example, as described in Patent Document 2, the descending time, the ascending time, the descending stop position, the ascending stop position, etc. can be set. Also good. Further, for example, as described in Patent Document 3, the jumping control during the lowering of the barrier rod and the unwinding control during the lifting may be performed.
Furthermore, in the case where intelligent control means such as a microprocessor is incorporated in the control unit 51 and there is a surplus in its processing capacity, in order to enable status monitoring at a monitoring center or the like, failure detection and failure information External transmission may be performed.
Further, in the implementation, the controller 51 is required to be fail-safe, which can be achieved by a combination of known techniques.

It is a block diagram which shows the general | schematic structure of the railroad crossing breaker of one Embodiment of this invention. About the level crossing cutting machine, the mechanical structure of the state which lowered | hung the barrier rod horizontally is shown, (a) is the left view which cut | disconnected the frame part and the cover part, (b) is the front view which cut the cover part vertically. . About the level crossing cutting machine, the mechanical structure of the state which raised the barrier rod vertically is shown, (a) is the left side view which cut the frame part and the cover part vertically, (b) is the front view which cut the cover part vertically. . It is a flowchart of a breaking rod raising / lowering control. It is a block diagram which shows the general | schematic structure of the conventional level crossing cutoff machine.

Explanation of symbols

11 ... Railroad crossing control device, 12 ... Power supply device, 13 ... Multi-core cable, 14 ... Connection box,
20 ... Railroad crossing breaker,
21 ... Control unit, 22 ... Control logic circuit, 23 ... Motor drive circuit,
24 ... setting unit, 25 ... motor (electric motor), 26 ... rotation detector,
27 ... Rotation transmission part, 28 ... Balancer, 29 ... Blocking bar holding part,
30 ... interceptor,
40 ... Railroad crossing breaker,
41 ... post, 42 ... frame portion, 43 ... lid portion,
51 ... Control unit, 52 ... Control logic circuit, 53 ... Motor drive circuit,
60 ... Rotation transmission part, 61 ... Gear reduction mechanism, 62 ... Belt reduction mechanism,
63 ... Driving pulley, 64 ... Belt, 65 ... Driven pulley, 66 ... Rotating shaft,
70 ... lower limit stopper, 71 ... swing arm, 72 ... lower limit detector, 73 ... upper limit detector,
TER: Train input signal, DC24V ... Standard power supply voltage, AC200V ... Additional power supply voltage

Claims (3)

A blocking rod holding portion for holding the blocking rod, a motor capable of rotating in both directions, a rotating shaft that supports the blocking rod holding portion in a swingable manner, and a rotary shake that transmits the rotational motion of the motor to the rotating shaft. In a railroad crossing breaker comprising a rotation transmission section having a dynamic conversion mechanism and a control section for controlling the rotational movement of the motor in response to a received train entry signal, a belt reduction mechanism is configured to rotate the rotation transmission section of the rotation transmission section. A dynamic power supply mechanism, a standard power supply voltage and an additional power supply voltage higher than the standard power supply voltage are supplied to the control unit, and a control logic circuit that performs processing of the train entry signal in the control unit is used as the standard power supply voltage. The motor driving circuit that directly drives the motor of the control unit operates with the additional power supply voltage, so that the driving side rotational force from the motor to the rotating shaft is in a cantilever state of the interrupting rod based on From serial blocking rod holding portion being adapted to exceed the load side rotational force to the rotary shaft, wherein the motor is housed in the frame portion for holding the rotary shaft horizontally, the belt speed reduction mechanism in said frame outer A railroad crossing breaker characterized by being covered with a lid . A blocking rod holding portion for holding the blocking rod, a motor capable of rotating in both directions, a rotating shaft that supports the blocking rod holding portion in a swingable manner, and a rotary shake that transmits the rotational motion of the motor to the rotating shaft. A rotation transmission unit having a dynamic conversion mechanism and a balancer for reducing a load side rotational force from the blocking bar holding unit to the rotating shaft based on a cantilever state of the blocking bar, and the motor according to a train entry signal received And a control unit for controlling the rotational motion of the rotary transmission, in place of the balancer of the rotary transmission unit, a lower limit for stopping the rotation of the rotary shaft by mechanical contact at the lower limit position of the barrier rod A stopper is provided, and the rotational oscillation conversion mechanism of the rotation transmission unit includes a belt speed reduction mechanism, and the control unit is supplied with a standard power supply voltage and an additional power supply voltage higher than that. The above The part that operates at the standard power supply voltage of the control unit includes a control logic circuit that processes the train input signal, and the part that operates at the additional power supply voltage of the control unit includes the A motor drive circuit that directly drives the motor is included, and when the control unit lowers the blocking rod to the lower limit position, the motor drive is stopped and the rotating shaft is held horizontally. A railroad crossing breaker characterized in that the motor and the lower limit stopper are housed in a frame portion to be covered, and the belt speed reduction mechanism is covered with a lid portion outside the frame portion .   The transmission line for the train incoming signal, the power supply line for the standard power supply voltage, and the power supply line for the additional power supply voltage are connected to an external device via a common multicore cable. The railroad crossing breaker described in Item 2.

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