TWI516395B - Disengagement detection equipment and railway vehicles for railway vehicles - Google Patents

Description

Derailment detection device for railway vehicles and railway vehicles

The present invention relates to a derailment detecting device for a railway vehicle and a railway vehicle provided therewith.

Conventionally, as a derailment detecting device for a railway vehicle, for example, a derailment detecting sensor having an actuator such as a micro switch is known, and when the rail is derailed, the actuator is rotated to be turned on ( ON) Actuator to activate the alarm and issue an alarm (for example, refer to Patent Document 1).

Patent Document 1: Japanese Patent No. 2695976

According to the technique described in Patent Document 1, in the configuration in which the derailment detecting sensor is used to detect the derailment, the sensor is easily damaged by the vibration of the trolley or the like. Therefore, it is necessary to be a very sturdy special specification sensor, and the price is high.

It is an object of the present invention to provide a derailment detecting device for a railway vehicle capable of detecting derailment with a simple configuration and inexpensive, without using such a special sensor, and a railway vehicle having the same.

The derailment detecting device of the present invention is provided with a derailing detecting device at the front end of the trolley, and has a movable member that moves in a predetermined direction by a load of a predetermined value or more; the derailing detecting member is attached to When the trolley is derailed, it will be accepted by contact with the track. The load above the predetermined value is transmitted to the movable member, and the movable member is moved in a predetermined direction; and the derailment detecting line is used to detect the derailment of the trolley or the derailment detection line of the light. Further, when the trolley is derailed, the electric conduction state or the light conduction state is blocked by the movement of the movable member.

According to this, it is possible to inexpensively detect the derailment by the so-called simple configuration of the movable member, the derailment detecting member, and the derailment detecting line. In addition, derailment can be detected without using a special-sized sensor or the like.

In addition, the railway vehicle of the present invention comprises: the derailment detecting device of the railway vehicle; the derailment detecting circuit is connected to the derailment detecting line of the derailing detecting device, and includes the conductance of the derailing detecting line. A relay that is actuated when the through state or the light conducting state is interrupted, and a brake is actuated in conjunction with the action of the relay.

The present invention can provide a derailment detecting device for a railway vehicle that can detect a derailment with a simple configuration and inexpensively, without using a special-sized sensor, and a railway vehicle having the same.

1‧‧‧ Derailment detection device

11‧‧‧ movable components

11A‧‧‧ Body Department

11Aa‧‧‧through hole

11B‧‧‧Installation Department

12‧‧‧Detecting arm

14‧‧‧Breakout board

21‧‧‧Fixed components

21a‧‧‧ Coverage

24‧‧‧ hollow bolts

3‧‧‧ Derailment detection line

4‧‧‧Trolley for railway vehicles

40‧‧‧ Vehicles

51‧‧‧ Derailment detection circuit

53‧‧‧煞车器

54‧‧‧ obstacle detection circuit

6‧‧‧ obstacle detection device

61‧‧‧ movable member (2nd movable member)

8‧‧‧ obstacle detection line

Fig. 1 is a side view of a railway vehicle trolley provided with a derailment detecting device for a railway vehicle.

Figure 2 is an enlarged view of a portion A of Figure 1.

Figure 3 is a front view of the portion A of Figure 1.

Figure 4 is a plan view of a portion A of Figure 1.

Figure 5 is a perspective view of the derailment detecting device.

Fig. 6 is an enlarged view of the fixing member and the movable member at a position where the derailment detecting line passes.

7(a) and 7(b) are a front view and a side view, respectively, showing the derailment detecting device in the state at the time of derailment.

Figure 8 is a block diagram of a portion of a derailment detecting device in a railway vehicle.

9(a) and 9(b) are front and side views, respectively, of a portion of a railway vehicle trolley provided with a derailment detecting device for a railway vehicle and an obstacle detecting device.

Figure 10 is a partial cross-sectional plan view of a derailment detecting device and an obstacle detecting device.

Figure 11 is a block diagram of a portion of a derailment detecting device and an obstacle detecting device in a railway vehicle.

Hereinafter, embodiments will be described with reference to the drawings. [1. Configuration of Derailment Detection Device] [1-1. Outline of Overall Configuration] FIG. 1 is a side view of a railway vehicle trolley provided with a derailment detecting device for a railway vehicle, and FIGS. 2 to 4 are respectively FIG. A magnified view, a front view and a top view of the A portion, and FIG. 5 is a perspective view of the derailment detecting device. The concept of the direction in the following description is that the direction in which the railway vehicle travels is forward, which is consistent with the concept of the direction toward the front. That is, the longitudinal direction of the vehicle corresponds to the front-rear direction, and the vehicle width direction corresponds to the left-right direction.

In FIG. 1 to FIG. 5, the derailment detecting device 1 for detecting the derailment of a railway vehicle is provided at the front end of the railway vehicle trolley 4 (hereinafter, also referred to as "trailer") (the front side of the vehicle traveling direction). It is located in front of the wheel 40. The off-track detecting device 1 includes a fixing member 21, a movable member 11, a detecting arm 12 functioning as a derailing detecting member, and a derailing detecting line 3.

As shown in FIGS. 1 to 4, the column member 42 is suspended from both end portions in the vehicle width direction of the front surface of the carriage 41 of the carriage 4, and a beam member extending inward in the vehicle width direction is provided at the lower portion of the column member 42. 43. In the present embodiment, the members 42 and 43 constitute the front end portion of the bogie 4. Further, the derailment detecting device 1 is attached to a support bracket 44 that protrudes forward from the front end of the beam member 43.

[1-2. Configuration of Fixing Member 21] The fixing member 21 is fixed to the beam member 43 through the support bracket 44. Specifically, as shown in FIG. 5, the fixing member 21 has a base portion that is T-shaped in plan view and fastened by a support bracket 44 and a bolt, and protrudes forward from a substantially center of the base portion. It is a flat plate in the direction of the width of the car. Further, in the fixing member 21, a cover 21a having a width equal to the base portion from the upper and the front cover plate portions is integrally formed. The main surface on the inner side in the vehicle width direction of the plate portion of the fixing member 21 is provided with a pedestal portion 21b (see FIG. 6) in a region overlapping the movable member 11.

[1-3. Configuration of Movable Member 11] As shown in FIGS. 2 and 3, the movable member 11 is disposed at a position above the rail R when the railway vehicle travels in orbit. Specifically, as shown in FIG. 5, the movable member 11 has a main body portion 11A and a mounting portion 11B.

The main body portion 11A is formed in a plate shape extending parallel to the longitudinal direction of the vehicle, parallel to the plate portion of the fixing member 21. The main body portion 11A is fastened to the plate portion of the fixing member 21 by a mounting bolt 22 extending in the vehicle width direction and a nut screwed to the mounting bolt 22. Thereby, the movable member 11 is rotatable around the mounting bolt 22. That is, the mounting bolt 22 functions as a rotating shaft. Further, the movable member 11 is configured to be rotated (moved) in a predetermined direction B by the action of a load of a predetermined value or more, with the aid of a hollow bolt 24 to be described later.

The main body portion 11A is formed with a through hole 11Aa at a position shifted from a center of rotation in a region overlapping the plate portion of the fixing member 21 (see FIG. 6). Further, a through hole 21c (see FIG. 6) is formed in the plate portion of the fixing member 21 and the pedestal portion 21b at a position corresponding to the through hole 11Aa. In the through holes 11Aa and 21c, one of the portions of the derailment detecting line 3 is inserted as will be described later.

The mounting portion 11B has a plate shape that is inclined with respect to the main body portion 11A so as to be located rearward of the vehicle. Further, the center portion of the mounting portion 11B in the left-right direction is connected to the front end portion of the main body portion 11A.

Further, in the mounting portion 11B, a plate-shaped barrier plate 14 (for example, a rubber plate in which a reinforcing cloth is embedded) is attached so as to be suspended, and when the railway vehicle is traveling, the track can be eliminated by the barrier plate 14. Obstacle on R.

[1-4. Configuration of Detection Arm 12] The detection arm 12 is, for example, in the form of a rod, and protrudes from the side of the main body portion 11A of the movable member 11 toward the inner side of the vehicle. In addition, the detecting arm 12 may protrude beyond the inner side of the vehicle and protrude toward the outer side of the vehicle.

The base end portion of the detecting arm 12 is fixed to the side surface of the main body portion 11A by welding or the like. The detecting arm 12 extends in a substantially horizontal direction to a position corresponding to the vicinity of the side edge of the rail fastening device 15. Further, the detecting arm 12 is disposed obliquely rearward as viewed from the mounting bolt 22 described above.

The detecting arm 12 receives a load of a predetermined value or more by contact with the rail R when the trolley 4 is derailed, and transmits the load to the movable member 11. Thereby, the movable member 11 fixed to the detecting arm 12 is rotated.

[1-5. Configuration of Derailment Detection Side Line 3] The derailment detection side line 3 is electrically connected or lighted, and when the trolley 4 is derailed, the electrical conduction state or the light conduction state is blocked by the rotation of the movable member 11. Broken. Thereby, the derailment can be detected. Specifically, the derailment detecting line 3 is connected to the off-track detecting circuit 51 provided on the vehicle body side as shown in FIG. 8. Once the derailing detecting circuit 51 detects the derailment, the message is displayed on the monitor device. 52. For example, the off-track detecting circuit 51 includes a relay that operates when the electrical conduction state or the light conduction state of the off-track detection line 3 is blocked. Once the relay is actuated, the brake 53 is actuated in conjunction with this as a very brake.

In the present embodiment, as the derailment detecting line 3, an electric wiring for conducting electricity is used. However, the derailment detecting line 3 can also be an optical fiber that conducts light. In this case, both ends of the derailment detecting line 3 are connected to the off-track detecting circuit 51 by converting the electric light into a light projector and converting the light into an electric light receiver. When the electric wiring is used as the off-track detection line 3, there is a fear that noise is applied to the signal device or the electronic device. However, if an optical fiber is used, such noise can be prevented.

The derailment detecting line 3 is formed in a rope shape having a hoop at the front end, and the majority of the outgoing and returning paths are bundled into a wire 30. The wire 30 is disposed along the column member 42, and the hoop portion formed by the central portion of the derailment detecting line 3 intersects the plate portion of the fixing member 21 at two places. More specifically, the derailment detecting line 3 is formed by a through hole provided at a position above the plate portion of the fixing member 21, and a through hole 11Aa of the movable member 11 and a through hole 21c of the fixing member 21. Continuous hole penetration.

As shown in Fig. 6, the shaft portion of the hollow bolt 24 is inserted into the through hole 11Aa of the movable member 11 and the through hole 21c of the fixing member 21. In other words, the hollow bolt 24 penetrates the main body portion 11A of the movable member 11 and the pedestal portion 21b and the plate portion of the fixing member 21. The nut 25 is screwed to the shaft portion of the hollow bolt 24, whereby the plate portion of the movable member 11 and the fixing member 21 is fastened. Further, the derailment detecting line 3 is inserted into the hollow bolt 24. Further, the derailment detecting line 3 exposed from the hollow bolt 24 is covered with a rubber hose 26. Further, the derailment detecting line 3 is covered by the heat shrinkable tube 27 at the exit portion of the through holes 11Aa and 21c.

Thereby, when the trolley 4 is derailed, when the load of the movable member 11 is applied to the movable member 11 by the detecting arm 12 that is in contact with the rail R, the movable member 11 is rotated, and the through hole 11Aa of the movable member 11 is opposed to The through hole 21c of the fixing member 21 is offset, thereby The hollow bolt 24 is broken. That is, the strength of the hollow bolt 24 is set to be broken by a load of a predetermined value or more to break the hollow bolt 24. In other words, the predetermined value is the breaking strength of the hollow bolt 24.

[1-6. Derailment and obstacle detection] When the vehicle is derailed, as shown in Figs. 7(a) and (b), the wheel 40 of the trolley 4 is detached from the rail R, and the trolley 4 includes the wheel 40 falling downward. . Thereby, the detecting arm 12 protruding to the side of the vehicle is in contact with the upper surface of the rail R, and the movable arm 11 is applied to the movable member 11 by a load of a predetermined value or more. Further, the movable member 11 rotates in a predetermined direction with respect to the fixed member 21, thereby functioning as a cutter, and the hollow bolt 24 and the derailment detecting line 3 inserted therein are cut. Once the derailment detecting line 3 is cut off, the electrical conduction state is blocked and the derailment is detected.

Further, the load for moving the movable member 11 is, for example, a static load of about 1 ton, but it can be variously changed by the diameter of the hollow bolt 24 or the distance from the center of rotation, and the like, as long as it is a load capable of detecting derailment. can.

Although the off-track detecting circuit 51 serves as a derailer, the obstacle board 14 can also be used for obstacle detection. That is, since the barrier plate 14 is attached to the movable member 11 (the mounting portion 11B), the barrier plate 14 collides with an obstacle on the rail R, and the load is received from the obstacle more than a predetermined value, and the movable member 11 The load of the predetermined value or more is received through the barrier plate 14, and is rotated in a predetermined direction to break the hollow bolt 24. Also in this case, the breakage detecting line 3 is cut off by the breakage of the hollow bolt 24 and the electrical conduction state is blocked. Further, even if the barrier board 14 collides with an obstacle on the rail R, if an obstacle such as a gravel is used, the obstacle is not removed from the rail R, and the movable member 11 does not rotate.

[1-7. Effects of the respective configurations] In this manner, the derailment detecting device 1 can be used in the station When the vehicle 4 is derailed, the detecting arm 12 is brought into contact with the track R and the movable member 11 is rotated, and the derailment detecting circuit 51 electrically detects the simple configuration of the rotation, and the derailment can be detected.

In this way, for example, in the case where the derailment detecting sensor (microswitch) is attached to the bogie 4 and the derailment is detected, for example, in order to surely avoid the vibration of the trolley 4 or the like, the derailment detection is sensed. If the device is damaged, it is necessary to use a sensor of a special specification, but according to the various configurations described above, this situation can be avoided, and even the cost side is advantageous.

In order to detect the derailment, the derailment can be detected by providing a simple configuration of the detecting arm 12 (derailing detecting member) protruding from the side of the movable member 11 toward the inner side of the vehicle (or the outer side of the vehicle). Make a very brakes work.

In addition, it is also possible to detect obstacles on the track R, as well as to activate the very brakes. In particular, the off-track detection and the obstacle detection can be performed by the common movable member 11 and the derailment detecting line 3, so that the structure can be simplified.

Further, since the derailment detection line 3 (the hollow bolt 24) is cut off by the simple action of the rotation of the movable member 11, the derailment is detected, so that it is possible to use a sensor of a special specification and inexpensively Perform detection.

Further, since the movable member 11 does not rotate if it does not receive a load of a predetermined value or more, it does not rotate during normal traveling, and does not inadvertently interrupt the electrical conduction state of the derailment detecting line 3.

[2. Others] The above embodiment can be modified as follows in addition to the above.

(1) In the movable member 11, not only the detecting arm 12 (derail detecting member) but also the venting plate 14 is attached, but only the detecting arm 12 (derail detecting member) may be attached. In this case, too In the same manner, the obstacle detecting device having the barrier plate can be separately mounted to the trolley 4, and the dedicated obstacle detecting circuit for detecting the obstacle on the track R can be further equipped to the railway vehicle. Hereinafter, this example will be described in detail with reference to FIGS. 9(a) to 11 .

9(a) and 9(b) are front and side views, respectively, of a portion of the railway vehicle trolley 4 provided with the off-track detecting device 1 and the obstacle detecting device 6, and FIG. 10 is a derailing detecting device 1 and an obstacle. A partial cross-sectional plan view of the object detecting device 6. In the present modification, the support bracket 44 for the derailment detecting device 1 protrudes rearward from the front end of the beam member 43. On the other hand, the obstacle detecting device 6 supports the bracket 45 from the front end of the beam member 43. Prominent in front.

The off-track detecting device 1 is configured in the same manner as the embodiment except that the movable member 11 is constituted only by a plate-like portion parallel to the plate portion of the fixing member 21. That is, in the movable member 11, only the detecting arm 12 is attached.

The obstacle detecting device 6 has the same configuration as the derailing detecting device 1 of the above-described embodiment except that the detecting arm 12 is not provided. In other words, the obstacle detecting device 6 includes a fixing member 71 fixed to the beam member 43 through the support bracket 45, a cover 72 integrally formed with the fixing member 71, and a movable member coupled to the fixing member 71 (second movable Member 61, and obstacle detection line 8.

The movable member 61 has a plate-shaped main body portion 61A that is fastened in the longitudinal direction of the vehicle by the plate portion of the fixing member 71, the mounting bolts 22 and the nut, and a mounting portion that is inclined with respect to the main body portion 61A. Mounting portion 61B of the board 14. That is, the movable member 61 is rotatable around the mounting bolt 22. Further, similarly to the configuration shown in FIG. 6, the movable member 61 is also fastened to the plate portion of the fixing member 71 by the hollow bolt 24 and the nut 25. Thereby, the movable member 61 is rotated (moved) in a predetermined direction by the action of a load of a predetermined value or more. In the hollow bolt 24, insert There is an obstacle detection line 8.

The obstacle detecting line 8 is electrically connected or lighted, and the movable member 61 receives a load of a predetermined value or more from an obstacle on the track R while the railway vehicle is traveling, and rotates to make the electric conduction state or light. The on state is blocked. In this way, obstacles can be detected. Specifically, the obstacle detecting line 8 is connected to the obstacle detecting circuit 54 provided on the vehicle body side as shown in FIG. 11, and once the obstacle detecting circuit 54 detects the obstacle, the message will be Displayed on the monitor device 52. For example, the obstacle detecting circuit 54 includes a relay that operates when the electrical conduction state or the light conduction state of the obstacle detecting line 8 is blocked. Once the relay is actuated, the brake 53 is actuated in conjunction with this as a very brake.

As the obstacle detecting line 8, it is also possible to use an electric wiring for conducting electricity, or an optical fiber for conducting light. In the latter case, both ends of the derailment detecting line 8 are connected to the obstacle detecting circuit 54 by converting the electric light into a light projector and converting the light into an electric light receiver. Similarly to the derailment detecting line 3, the obstacle detecting line 8 bundles most of the outward and return paths into a wire 80 so as to have a rope shape having a hoop at the front end. The wire 80 is disposed along the column member 42, and the hoop portion formed by the central portion of the obstacle detecting line 8 intersects with the plate portion of the fixing member 61 at two places. Similarly to the configuration shown in FIG. 6, the movable member 61 is provided with the through hole 11Aa, and the through hole 21c is provided in the plate portion of the fixing member 21 and the pedestal portion 21b. Further, a shaft portion of the hollow bolt 24 is inserted into the through hole 11Aa of the movable member 61 and the through hole 21c of the fixing member 21.

Alternatively, the movable member 11 of the off-track detecting device 1 can also be used for derailment detection and obstacle detection, respectively. In this case, the obstacle detecting line 8 is added to the off-track detecting device 1 shown in FIGS. 1 to 5, and the obstacle detecting circuit 54 may be added to the vehicle body side. In addition, once the obstacle detection line 8 is added to the derailment detecting device 1, it means that 2 movable members 11 are provided. Hollow bolts 24.

(2) The movable member 11 of the off-track detecting device 1 and/or the movable member 61 of the obstacle detecting device 6 do not necessarily need to be rotated, and may be derailed by moving (linear movement, bending movement, etc.) The detection line 3 and/or the obstacle detection line 8 are cut off.

(3) The derailment detecting line 3 and/or the obstacle detecting line 8 may not penetrate through the through holes 11Aa and 21c, but only penetrate one through hole. Further, the through holes may not be penetrated at all, and may be arranged to be cut by the movement of the movable member 11. For example, if the derailment detecting line 3 and/or the obstacle detecting line 8 are disposed in such a manner as to traverse the moving rail (rotating orbit) of the movable member 11, the derailment detection can be easily cut off by the movement of the movable member 11. Line 3 and/or obstacle detection line 8.

(4) In the above-described embodiment, the brake device 53 is operated as a very brake, but the invention is not limited thereto. For example, the warning light of the driver's seat may be lighted, or the alarm may be sounded.

(5) The detecting arm 12 as the derailment detecting member may be a columnar shape, a plate shape, a box shape or the like in addition to the cylindrical shape, as long as it can detect the shape of the derailment.

(6) The fixing member 21 does not necessarily have to be different from the bogie 4, and may be integrally formed in one portion of the bogie 4.

(7) The factor that the electrical conduction state or the light conduction state of the derailment detecting line 3 is blocked is not necessarily limited to the cutting of the derailing detecting line 3. For example, the derailment detecting line 3 may be divided into a line portion on the side of the fixing member 21 and a line portion on the side of the movable member 11, and the line portions are connected to each other through the connector, and when the movable member 11 moves, the connector Separate. In this respect, the obstacle detection line 8 is also the same.

(8) The movable member 11 and/or the obstacle detecting device 6 of the derailment detecting device 1 The predetermined value of the movable member 61 moving in a predetermined direction does not necessarily have to be the breaking strength of the hollow bolt 24, and may be appropriately selected. For example, the buckling strength of the tubular member extending in the longitudinal direction of the vehicle can also be employed.

1‧‧‧ Derailment detection device

3‧‧‧ Derailment detection line

11‧‧‧ movable components

11A‧‧‧ Body Department

11B‧‧‧Installation Department

12‧‧‧Detecting arm

14‧‧‧Breakout board

21‧‧‧Fixed components

21a‧‧‧ Coverage

22‧‧‧Installation bolts

23‧‧‧ hoop department

26‧‧‧Hose

27‧‧‧Heat shrink tube

44‧‧‧Support bracket

Claims (5)

A derailment detecting device for a railway vehicle is disposed at a front end portion of the trolley, and is characterized in that: the movable member is moved in a predetermined direction by a load of a predetermined value or more; the derailing detecting member is attached When the trolley is derailed, the load received above the predetermined value by the contact with the track is transmitted to the movable member, and the movable member is moved in a predetermined direction; the derailment detecting line is used to detect the The off-track conduction or light de-tracking detection line of the trolley is configured to be blocked by the movement of the movable member when the trolley is derailed, and the electrical conduction state or the light conduction state is blocked; a member fixed to the front end of the trolley; and a hollow bolt penetrating the movable member and the fixing member; the derailment detecting line is inserted through the hollow bolt; the predetermined value is a breaking strength of the hollow bolt. The off-track detecting device for a railway vehicle according to the first aspect of the invention, wherein the movable member receives a load of a predetermined value or more and rotates around a rotating shaft extending in a vehicle width direction; the derailing detecting line is transversely cut. The movable member is arranged in such a manner as to rotate the track. A derailment detecting device for a railway vehicle is disposed at a front end portion of the trolley, and is characterized in that: the movable member is moved in a predetermined direction by a load of a predetermined value or more; the derailing detecting member is attached When the trolley is derailed, it will be accepted by contact with the track. The load above the predetermined value is transmitted to the movable member, and the movable member is moved in a predetermined direction; and the derailment detecting line is used for detecting the derailment of the trolley or the derailing detection line of the light, and When the trolley is derailed, the movable member is blocked by the movement of the movable member, and the electrically conductive state or the light conducting state is blocked. The movable member has a plate-like body extending in the longitudinal direction of the vehicle. And the rail vehicle is disposed at a position above the rail when the rail vehicle is traveling on the rail, and receives a load equal to or greater than the predetermined value and rotates around a rotation axis extending in the vehicle width direction; the derailment detecting member is configured to An arm that protrudes from a side surface of the main body portion of the movable member to the outer side of the vehicle or the inner side of the vehicle, transverse to the rotation rail of the movable member. A derailment detecting device for a railway vehicle is disposed at a front end portion of the trolley, and is characterized in that: the movable member is moved in a predetermined direction by a load of a predetermined value or more; the derailing detecting member is attached When the trolley is derailed, the load received by the contact with the track is transmitted to the movable member and the movable member is moved in a predetermined direction; and the derailment detection line is used for detecting The off-track conduction current or the light de-track detection line of the trolley is configured to be blocked by the movement of the movable member when the trolley is derailed, and the electrical conduction state or the light conduction state is blocked; The movable member is disposed at a position above the rail when the railway vehicle is traveling on a track, and receives a load of a predetermined value or more and rotates around a rotating shaft extending in a vehicle width direction; the derailing detecting member is configured to Configuring from the manner of transversely cutting the rotating track of the movable member An arm protruding from a side of the movable member toward the outer side of the vehicle or the inner side of the vehicle; and the movable member is provided with a barrier plate for removing an obstacle from the rail, the movable member is from the rail when the railway vehicle is walking The upper obstacle is moved in a predetermined direction by receiving a load of a predetermined value or more. A railway vehicle characterized by comprising: a derailment detecting device for a railway vehicle of claim 4; a derailment detecting circuit connected to the derailment detecting line of the derailing detecting device, and including the derailment once When the electrical conduction state or the light conduction state of the detection line is blocked, the relay is actuated; the brake device is operated in conjunction with the action of the relay; the obstacle detection line is used to detect the track. The obstacle conduction or the light obstacle detection line is configured to block the electrical conduction state or the light conduction state by the movement of the movable member; and the obstacle detection circuit and the obstacle detection Wire connection.