JPH0324448Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a level crossing barrier having a blocking rod that is reverse-controlled when a train approaches or passes.

(Prior Art) Examples of conventional stepping machines include those shown in FIGS. 1 and 2, for example.

That is, the barrier main body 10 of the level crossing barrier 1 is provided with a drive shaft 11, and a holding fitting 2 is connected to a square shaft portion 11a formed at the tip of the drive shaft 11 by a connecting pin 12. Holding part 2 of holding fitting 2
1 has one end of a blocking rod 20 fixedly held, and when the train approaches a railroad crossing, the blocking rod 20 is reversed to the blocking position as shown in FIGS. 1 and 2 by normal rotation of the drive shaft 11, and the train is After passing the railroad crossing, drive shaft 1
1, the blocking rod 20 returns to the open position.

However, in recent years, there have been many accidents in which the barrier bars of level crossing barriers are damaged by vehicles, etc., and when the barrier bars 20 of the conventional level crossing barrier 1 as described above are damaged by vehicles, etc. Until the damaged cutoff rod 20 is replaced with a new cutoff rod,
Blocking rod 2 damaged by approaching and passing trains
There is a problem in that the function of the level crossing barrier 1 stops even if the level crossing barrier 1 simply swings and reverses between the blocking position and the open position, which is very dangerous.

In particular, if the barrier 20 of the level crossing barrier 1 is damaged at an unmanned level crossing, it will take longer to install a new barrier than in the case of a manned level crossing. is even more dangerous.

(Purpose of the invention) The present invention has been developed by focusing on the above-mentioned problems.The above-mentioned problems can be solved by providing the level crossing barrier with a secondary barrier that performs the blocking function when the barrier is damaged. It aims to solve the problem.

[Structure of the idea]

In order to achieve such an object, the present invention provides a level crossing barrier having a barrier that is reverse-controlled when a train approaches and passes, including a sub-blocking barrier that is rotatable around a drive shaft of the barrier and A damage detector is provided for detecting damage to the cutoff rod, and the sub-breakage rod is in a holding position where the secondary cutoff rod is held in an open position under normal conditions, and is in a release position in which the holding is released when the detector detects damage. A locking member that is displaced in conjunction with the detector is provided integrally with the sub-blocking rod, and is further connected to the locking member in the detached position when the damaged blocking rod returns to the open position. A level crossing barrier is characterized in that a locked member is integrally provided with the drive shaft, and the damage detector detects damage to the barrier rod, and the damaged barrier is in an open position. When returned, the locking member is connected to the locked member, and the sub-blocking rod is connected to the drive shaft via this connection.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

3 to 9 show an embodiment of the present invention, and FIG. 5 is a sectional view taken along the line - in FIG.
FIG. 6 is a view taken along the arrows in FIG. 5, showing a state in which part A in FIG. 5 is removed.

Note that the same parts as in the conventional example are given the same reference numerals.

As shown in Figures 3 to 5, the level crossing barrier 1
is a circuit breaker main body 10, a drive shaft 11 provided in the main body 10, and a circuit breaker rod 2 connected to the drive shaft 11.
0, a damage detector 3 that detects damage to the cut-off rod 20, and a second holding metal fitting 4 that is rotatable about the drive shaft 11 and holds the sub-shut-off rod 40. and is provided integrally with the metal fitting,
A locking member 5 is in a holding position in which the sub-blocking rod 40 is held in the open position under normal conditions, and is moved in conjunction with the damage detector 3 to a release position in which the holding is released when damage to the blocking rod 20 is detected. , and a locked member 6 that is provided integrally with the drive shaft 11 and is connected to the locking member 5 in the release position when the blocking rod 20 returns to the open position.

The drive shaft 11 is connected to a control mechanism (not shown) provided in the circuit breaker main body 10, and is controlled to reverse when a train approaches or passes.

As shown in FIG. 5, a square shaft portion 11a is formed at the tip of the drive shaft 11.
The square hole 71 of the replenishment socket 7 is fitted into the
The socket 7 is fixed to the square shaft portion 11a of the drive shaft 11 by a connecting pin 72. This socket 7
A circular shaft portion 73 and a square shaft portion 74 are formed in the.

The mounting portion 22 of the first holding fitting 2 is fixed to the square shaft portion 74 by a connecting pin 23, and the first holding fitting 2 is connected to the drive shaft 11 via the socket 7.

As shown in FIGS. 3 to 5, the first holding fitting 2
An end portion 20a of the blocking rod 20 is fixedly held in the holding portion 21 of the holding portion 21. A weight 24 for the blocking rod 20 is fixed to the side wall of the first holding fitting 2.

As shown in FIGS. 3 and 7 to 9, a support member 30 with a U-shaped cross section is fixed to the first holding fitting 2, and an end portion of the support member 30 is provided to prevent damage to the cutoff rod 20. A damage detector 3 for detecting damage is fixedly installed.

This damage detector 3 includes a case 3a fastened to a support member 30 with bolts, a lid 3b for the case 3a, and a crank 31 whose shaft is pivotally supported by the case 3a and a detection pin 31a is fixed to the tip. A sector gear 32 fixed to the shaft of the crank 31, a mounting plate 3c fixed to the inner wall of the case 3a, and a sector gear 3
2, and a pinion 33 with a shaft portion 33a pivotally supported on the mounting plate 3c, and a shaft portion 34a coaxial with the pinion 33.
A small gear 33 and a semicircular cam plate 3 are attached depending on the thickness and bending strength of the cutoff rod 20.
a needle 35 that connects the shaft parts 33a and 34a so that the relative position with respect to the needle 35 can be changed; and a protrusion 36a that is urged to abut against the cam surface 43a of the semicircular cam plate 34.
The micro switch 36 is stretched between a pin fixed to the case 3a and a pin protruding from the sector gear 32, which operates when the protrusion 36a engages with the detection part 34b of the cam surface 34a. , the sector gear 32 is moved in the direction in which the detection pin 31a comes into contact with the blocking rod.
It consists of a tension spring 37 that urges the.

As shown in FIGS. 3 to 6, the second holding fitting 4 that holds the sub-blocking rod 40 includes a holding part 41 that fixes and holds the end of the sub-blocking rod 40, a base part 42,
A bearing portion 43 that fits around the circular shaft portion 73 of the socket 7 is integrally formed, and the second holding fitting 4 is rotatable around the circular shaft portion 73 of the socket 7.
Further, a weight 44 for the sub-blocking rod 40 is fixed to the second holding fitting 4.

A plunger 81a is attached to the base portion 42 of the second holding fitting 4 in conjunction with the operation of the micro switch 36 (when the damage detector 3 detects damage to the cutoff rod 20) as shown in FIG. A plunger-shaped magnet 81 that can be retracted by suction from a position is installed, and a lever 82 having one end 82a connected by a pin is pivotally attached to the plunger 81a.

A spring member 83 that urges the plunger 81a clockwise is provided on the base portion 42, and the urging force of the spring member 83 is set to be smaller than the attraction force of the magnet 81.

As shown in FIGS. 4 to 6, the locking member 5
The main arm 50 is pivotally connected to a washer 5a fixed to the lower force of the base part 42 by a pin 5b, and the sub arm 5 is provided to protrude laterally from the main arm 50.
1, one end of the main arm 50 has a U-shaped engagement portion 50a that engages with the rib 10a of the circuit breaker main body 10 to hold the sub-shutoff rod 40 in the open position, and the other end of the main arm 50 has a U-shaped engagement portion 50a that engages with the rib 10a of the circuit breaker main body 10 to hold the sub-shutoff rod 40 in the open position. A tip engaging portion 50b that can be engaged with the outer peripheral portion 60 of the locked member 6 is formed, respectively. The distal end 51a of the sub-arm 51 is capable of engaging with the engaging end 82b of the lever 82, and the distal end 51a of the sub-arm 51 is locked by the engaging end 82b of the lever 82 in the original position shown in FIG. The locking member 5 is held in the holding position shown in FIG.

As shown in FIGS. 5 and 6, a spring member 52 that biases the locking member 5 toward the release position (counterclockwise in the figure) is attached to the base portion 4 of the second holding fitting 4.
2 and the main arm 50.

The locked member 6 is fixed to the circular shaft portion 73 of the replenishment socket 7, and when the cutoff rod 20 returns to the open position, the engagement portion 50 at the tip of the main arm 50
A notch 60a that can be engaged with the locking member 6 is formed in the outer peripheral portion 60 of the locked member 6.

In the level crossing barrier 1 having the above configuration, the barrier rod 2
0 is not damaged (normal state), the plunger 81 and the lever 82 are held in the original position shown in FIG. 6 by the biasing force of the spring member 83, and the engaging end 82b of the lever 82 is Since the distal end portion 51a of the sub-arm 51 of the locking member 5 is locked and the rotation of the locking member 5 in the counterclockwise direction by the spring member 52 is prevented, the U-shaped engaging portion 5 of the main arm 50
The locking member 5 is held at the holding position by the engagement of the rib 10a with the rib 10a.

Therefore, the sub-blocking rod 40 is closed by the locking member 5.
is held in the open position shown in FIGS. 3 to 6, and only the blocking rod 20 is driven in reverse by rotation of the drive shaft 11 between the blocking position shown in FIG. 3 and the open position.

Next, when the blocking rod 20 receives a force in the direction shown by the arrow in FIGS. 7 and 8 and is damaged in the direction of the arrow, the detection pin 31a of the damage detector 3 , the crank 31 rotates counterclockwise in FIG. 7, and this rotation causes the sector gear 32 to rotate counterclockwise in FIG. 7. The semicircular cam plate 34 is rotated clockwise in FIG. 7 via the small gear 33. Due to this rotation, the detection part 3 of the cam surface 34a of the semicircular cam plate 34
4b engages with the protrusion 36a of the micro switch 36, the micro switch 36 is activated.

By the operation of the micro switch 36, the plunger magnet 81 attracts and retracts the plunger 81a from the original position shown in FIG. 6 against the biasing force of the tension spring 83, and the lever 82 returns to the original position shown in FIG. Rotate counterclockwise from Due to this rotation, the engaging end 82b of the lever 82 is disengaged from the tip 51a of the sub-arm 51, and the locking member 5 is released from the holding position shown in FIG. 5 in the counterclockwise direction by the biasing force of the spring member 52. The U-shaped engaging portion 50a of the main arm 50 is disengaged from the rib 10a, and the distal end engaging portion 50b of the main arm 50 comes into contact with the outer peripheral portion 60 of the locked member 6 at the released position.

In this manner, when the locking member 5 is displaced to the release position, the blocking rod 20 is moved counterclockwise by 90 degrees from the blocking position shown in FIG. 3 due to the rotation of the drive shaft 11 as the train passes. When the locked member 6, which is integrated with the drive shaft 11, also rotates counterclockwise from the position shown in FIG. 6, the main arm 5
The tip engaging portion 50b of 0 is connected to the outer peripheral portion 6 of the locked member 6.
It engages with the notch 60a of 0 under the biasing force of the spring member 52.

This engagement connects the locked member 6 and the locking member 5, so the sub-blocking rod 40 is connected to the drive shaft 11 via the locking member 5 and the locked member 6.

In this state, when the drive shaft 11 rotates as the train approaches, the sub-blocking rod 40 will be moved to the damaged blocking rod 20.
At the same time, the sub-blocking rod 40 rotates from the open position to the blocking position, and the auxiliary blocking rod 40 functions as a blocking rod in place of the damaged blocking rod 20.

(Effects of the invention) According to the level crossing barrier according to the present invention, the sub-bar which is held in the open position under normal conditions is provided separately from the bar, and the damage detector detects damage to the bar and detects damage. When the cut-off rod returns to the open position, the secondary cut-off rod is connected to the drive shaft of the cut-off rod, so the secondary cut-off rod is connected to the drive shaft of the cut-off rod after the cut-off rod is damaged until the cut-off rod is repaired. The blocking rod is driven in reverse together with the blocking rod, the blocking function of the level crossing barrier is maintained, and it is possible to prevent the level crossing blocking function from being stopped due to an accident in which the blocking rod is damaged.

[Brief explanation of the drawing]

Fig. 1 and Fig. 2 show a conventional example, Fig. 1 is a front view of the main part, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 to Fig. 9 are one embodiment of the present invention. For example, Figure 3 is a front view, Figure 4 is a left side view of Figure 3, Figure 5 is a sectional view taken along the - line of Figure 3, and Figure 6 is A of Figure 5. Fig. 5 is a view taken in the direction of the arrows in Fig. 5 showing the state in which the parts are removed, Fig. 7 is a front view showing the main parts, Fig. 8 is a right side view of Fig. 7, and Fig. 9 is a
FIG. 1... Level crossing barrier, 3... Damage detector, 5...
Locking member, 6... Locked member, 11... Drive shaft,
20...Block rod, 40...Sub-block rod.

Claims (1)

[Scope of utility model registration request] A level crossing barrier having a blocking rod that is reverse-controlled as trains approach and pass, includes a sub-blocking rod rotatable around a drive shaft of the blocking rod and a damage detector for detecting damage to the blocking rod. and a locking member that is in a holding position to hold the sub-blocking rod in the open position under normal conditions and is moved in conjunction with the detector to a release position in which the holding is released when the detector detects the damage. A locked member that is integrally provided with the sub-blocking rod and that is connected to the locking member in the release position when the damaged blocking rod returns to the open position is integrated with the drive shaft. A level crossing barrier machine characterized by the following: