JP3288095B2 - Electric point machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric switch for switching a tongue rail between a normal position and a reverse position by using a line branching device.

[0002]

2. Description of the Related Art Conventionally, as this type of electric point machine,
The one proposed by the applicant in Japanese Patent Application No. 2-275935 is known. This is provided with a conversion lock device for converting the tongue rail, an operation rod for operating the conversion lock device, and a drive mechanism for driving the operation lock. The shock absorbing mechanism provided between them realizes a shock absorbing effect when the operation of the operation can is obstructed for some reason, and has an excellent effect of reducing maintenance costs.

[0003] However, as the electric motor constituting the drive mechanism, a motor operated by a three-phase AC power supply is used.
As a method of braking the motor, a method of opening a power supply terminal of the motor during operation and short-circuiting the terminal after a predetermined time has elapsed (so-called power generation braking) has been adopted.

[0004]

For this reason, when the power supply is a single-phase power supply (the signal power supply in a normal railway signal system is a single-phase power supply), a large and expensive single-phase to three-phase power supply is converted. A conversion device is required, and the power cable from the equipment room where this conversion device is installed to the site where the electric point is installed needs to be replaced from a single-phase cable to an expensive three-phase cable. There was a problem to be improved that the cost of the supply equipment was high.

[0005] In addition, in the case of dynamic braking, since the braking force varies unless the time from when the power supply terminal is opened to when this terminal is short-circuited is strictly controlled, precise control is required, and reliability and economy are poor. Had the disadvantage that The present invention
The present invention has been made in view of the problems of the related art, and an object thereof is to provide an electric switch capable of simplifying a power supply facility and the like and improving reliability. .

[0006]

The gist of the present invention to achieve the above object is to convert a tong rail (T) between a localization and an inversion by a one-line branch (P). A conversion lock device (35) for converting the tong rail (T), an operation can (30) for operating the conversion lock device (35), and a drive mechanism for driving the operation can (30) (12) An electric point machine provided with a point control device (60), wherein the drive mechanism (12)
Is constituted by an electric motor (M) operated by a single-phase alternating current, and the conversion lock device (35) has an engagement recess (38a) at one end and a stopper portion forming both edges of the engagement recess (38a). (38b) is formed, and the other end is connected to the tongue rail (T) to actuate the tongue rail (T) from the normal position where the tongue rail (T) is locked in a fixed position. An output link that can swing to the turning position
One end is connected to the operation can (30), and the other end is disposed so as to face one end of the output link (38). ) Is brought into contact with one of the engagement recesses (3).
8a) and swings so as to abut on the other of the stopper portions (38b) to swing the output link (38) from the normal position to the turning position and lock the input link (38) to the turning position. 37), and the input link (3)
7) The contact position of the output link (3) with respect to the stopper portion (38b) is set even if the braking force of the brake is always small.
8) A position deeper than the engaging concave portion (38a) so that the locked state to the change position of 8) can be sufficiently locked, and the switch control device (60) sets the position when the change operation is completed. A point control unit (63) that outputs a braking command to the electric motor (M) during the conversion operation to operate the electric motor (M), and when the braking command is issued,
While cutting off the power supply to the electric motor (M),
An electric point machine comprising a motor drive section (62) for applying a rectified current to a primary winding of the electric motor (M) to perform excitation braking.

[0007]

When the operating rod (30) is operated by the electric motor M of the drive mechanism (12), the tongue rail T is converted by the conversion locking device (35). Since the electric motor M operates in a single phase, power equipment such as a single-phase power supply and a power cable usually prepared in a railway signal system can be used as it is.

When the contact position of the input link (37) to the stopper portion (38b) in the conversion lock device (35) is made sufficiently deep, a so-called constant state normally provided in this type of a turning machine is provided. Even if the braking force of the brake is reduced, the locked state is locked with sufficiently high reliability. For this reason, in addition to the driving force required for the conventional tong rail T conversion, the capacity of the electric motor, which is required to output the driving force for overcoming the large braking force of the constant brake, can be reduced. Thus, the disadvantage of a single-phase motor, in which the efficiency decreases as the capacity increases, can be avoided.

In the point control device (60), a braking command is output from the point control unit (63) when the conversion operation is completed, and in response to the braking command, the motor drive unit (62) receives the braking command. The power supply to the electric motor M is cut off, and the excitation braking is performed by supplying a rectified current to the primary winding of the electric motor M. At this time, it is not necessary to perform control such as power generation braking that strictly manages the time.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG.
Is provided beside the turnout P of the track. The branching device P is configured such that a tongue rail T is convertably provided on a main rail R. An operation can 30 connected to the tong rail T side to perform a conversion operation, and an operation can 30
And a lock can 50 for restraining the tongue rail T is provided so as to be slidably supported on the point machine case 11.

A conversion lock device 35 is provided outside the electric switch main body 10, and the operation can 30 is connected to the tong rail T via the conversion lock device 35. As shown in FIGS. 5 to 7, the electric point machine main body 10 includes a point machine case 1.
An electric motor M is provided at one end in the device 1, and the output of the electric motor M acts on the operation can 30 via the drive mechanism 12.

The electric motor M is operated by a single-phase power source.
1 for reducing the rotation speed, and comprises the following gear system. An output gear 13 is fixed to an output shaft M1 of the electric motor M, and the output gear 13 is meshed with a first-stage large gear 14a of a first-stage reduction gear 14. The second-stage large gear 15a of the second-stage reduction gear 15 meshes with the first-stage small gear 14b of the first-stage reduction gear 14. The second-stage small gear 15b of the second-stage reduction gear 15 has the third-stage large gear 1 of the third-stage reduction gear 16 attached thereto.
6a mesh with each other, and the third-stage small gear 16 of the third-stage reduction gear 16
b is meshed with the conversion gear 20.

The conversion gear 20 serves as a driving member of a conversion lock device 35 for converting the operation can 30, and the conversion gear 20.
Is engaged with the rack member 25. An operating can 30 is connected to the rack member 25 via a buffer mechanism 21. 8 to 11, a guide groove 31 is formed in the operation can 30 and the rack member 25 is fitted in the guide groove 31 so as to be relatively movable in the forward and backward directions. A long hole 25a is formed in the rack member 25 and the long hole 2a is formed.
A lifting bolt 32 screwed to the operation can 30 is fitted into 5a.

The rack member 25 has a recess 26 having a semicircular cross section.
Is formed in the space defined by the concave portion 26 of the rack member 25 and the groove 33 of the operation can 30 facing the concave portion 26.
Is fitted. The buffer mechanism 21 is configured as follows. The spring member 22 having a buffering action is provided by the telescopic rod 2.
3 are provided with a plurality of continuous flat springs 22a, which urge the ends 23a, 23b of the telescopic rod 23 in the direction of being separated by the flat springs 22a. The ends 23a and 23b of the telescopic rod 23 resiliently contact the front and rear walls of the fitting groove 33 of the can 30 respectively.

The flat spring 22a may be a coil spring. The operation can 30 extends forward and is connected to the conversion lock device 35 via a link member 34. As shown in FIGS. 4 and 8, the conversion lock device 35 includes a conversion case 36 and an input link 37 that is swingably supported by the conversion case 36 and has a link member 34 connected to one end.
And an output link 38, which is also pivotally supported, one end of which is disengaged from the other end of the input link 37.

One end of the output link 38 is connected to the input link 3
7 are engaged, and the input link 37 is connected to the output link 38.
The engagement recess 38a is formed so that the output link 38 is disengaged, and one end of the input link 37 is disengaged.
Are formed continuously on both sides of the engagement recess 38a. A driving rod 39 is connected to the other end of the output link 38, and the driving rod 39 is connected to the tongue rail T side.

Here, the input link 37 is connected to the operation
With the operation of, the stopper portion 38b comes into contact with one of the stopper portions 38b.
From the state, engages with the engagement recess 38a and further stops the stopper.
Swinging so as to contact the other end of the
38 is the normal position L shown in FIG. ₀ Conversion position L₁ Rocking
The turning position L₁ Have the function of locking
However, the position where it comes into contact with the stopper portion 38b is as shown in FIG.
Is set to

That is, conventionally, the engaging recess 38a
Was the position of the end (locking limit) T ₀ near shallow position T _1, so that the locked state is sufficient locking possible, is set at a deep position T ₂ than the locking limit T ₀ I have. Specifically, the position of 18 mm (6.0 degrees at the angle of the input link 37)
9 °) was at 37mm (11.18 °)
It has been. Note that the position of the input link 37 abuts against the stopper portion 38b is also subjected to any impact or the like due to the passage of the train, is locked state of the braking force always weakened brake convertible position L ₁ of the output link 38 The depth is not limited to this value as long as the depth can be sufficiently locked.

Here, the constant brake is a brake that constantly applies a braking force to the electric motor M, and is, for example, a so-called magnet brake. Here, the magnet brake is a magnet-side disc having N poles and S-poles alternately formed along the outer circumference, and a hysteresis material-side disc having conductors and the like on the outer circumference facing the N-pole and S-pole. And a torque generated by an eddy current generated by a hysteresis phenomenon of the magnet and a rotation difference between the two disks.

Since the contact position of the input link 37 with the stopper portion 38b is set sufficiently deep as described above, the braking force of this constant brake can be made smaller than in the prior art. For this reason, conventionally, the tong rail T
The capacity of the electric motor M, which is required to output the driving force required to overcome the large braking force of the constant brake in addition to the driving force required for the conversion of the power, can be reduced, and as the capacity increases, The disadvantage of the single-phase motor that the efficiency is reduced can be avoided.

As shown in FIG. 5 and FIG.
The lock mechanism 40 of the lock canister 50 is synchronized with the movement of the lock can.
Is provided. The lock mechanism 40 of the lock can 50 is fixed to the base member 41 fixed to the operation can 30 and the front and rear ends of the base member 41, and is driven by the operation can 30 to lock the lock can 50. It comprises a pair of lock pieces 45, 45 which are engaged and disengaged with the notch 51 to lock or unlock.

Each of the operation cans 30 has a check block 4
3a and 43b are provided, and the check blocks 43a and 43b are provided.
43b includes detection arms 44a and 44b of the sensor unit 44.
Abuts and can swing. As shown in FIG.
A point control device 60 that controls the operation of the electric point machine main body 10 includes a motor drive unit 62 that receives electric power from a motor power supply unit 61 and drives the electric motor M, and a roller that controls the motor drive unit 62. And a control unit 63.

The point control device 60 has a sensor input section 64 for receiving operation information detected by the sensor section 44 of the electric point machine main body 10, and a transmission for transmitting external information to the point control section 63. A part 65 is provided. The motor drive unit 62 receives a braking command from the point control unit 63, and cuts off the power supply to the electric motor M in response to the completion of the conversion of the operation can 30, while supplying a rectified current to the power supply line to perform excitation braking. It is configured to be.

That is, as shown in FIG. 2, the motor drive unit 62 is a relay for connecting the single-phase AC power supply terminals R and S supplied from the motor power supply unit 61 to the respective windings of the motor M during the conversion operation. 71, 72, 73 and the phase advance capacitor 7
4, a full-wave rectifier circuit 75, and relays 76 and 77 for connecting the single-phase AC power supply terminals R and S to the temporary winding of the motor M via the full-wave rectifier circuit 75 during braking.

Next, the operation will be described. FIG. 5 shows, for example, a locked state of the lock, in which one lock piece 45 is engaged with the lock notch 51 of the lock can 50 to lock the lock can 50. At this time, the front end 23a of the telescopic rod 23 resiliently contacts the front wall of the concave portion 26 of the rack member 25 and the front wall of the fitting groove 33 of the operation can 30.
The rear end 23b of the telescopic rod 23 resiliently contacts the rear wall of the concave portion 26 of the rack member 25 and the rear wall of the fitting groove 33 of the operation can 30.

When the electric motor M is started for the conversion operation, the output gear 13 of the output shaft M1, the first-stage large gear 14a, the first-stage small gear 14b, and the second-stage reduction gear 15 of the first-stage reduction gear 14 are provided. , The second-stage large gear 15a, the second-stage small gear 15b,
The conversion gear 20 is rotationally driven by the drive mechanism 12 that reaches the third-stage large gear 16a and the third-stage small gear 16b of the third-stage reduction gear 16.

In the normal shifting operation, the spring member 22 of the buffer mechanism 21 does not bend, and the rack member 25 is displaced forward together with the shifting gear 20. When the rack member 25 is slightly displaced, the operation can 30 is also displaced, and one lock piece 45 in the locked state is slid and displaced forward, that is, in the unlocking direction. The lock piece 45 is disengaged from one lock notch 51 of the lock can 50 and the lock can 50 is unlocked.

When the conversion gear 20 further rotates and the rack member 25 is further displaced forward, the operation can 30 is driven, and the input arm 37 swings clockwise in FIG. When the input link 37 swings, the end of the input link 37 is disengaged from the stopper 38b of the output link 38 and engages with the engagement recess 38a of the output link 38.

Further, when the input link 37 swings, the end of the input link 37 is engaged with the engagement recess 38a of the output link 38.
, The output link 38 swings counterclockwise, and the tongue rail T is turned to the opposite position via the driving rod 39. The end of the input link 37 is brought into contact with the predetermined position T ₂ of the other stopper portion 38b, the output link 38 is locked by swinging up the conversion position L _1. When the conversion of the tongue rail T is completed, the other lock piece 45 is fitted into the other lock notch 51 of the lock can 50 and locked.

The operating state of the lock pieces 45, 45 during the conversion operation is detected by the sensor unit 44 when the detection arms 44a, 44b are pushed and moved by the check blocks 43a, 43b. The movement of the lock pieces 45, 45 indicates the operation state of the operation can 30 and the lock can 50, and the sensor unit 44 switches the operation state of the operation can 30 and the lock can 50 via the sensor input unit 64. The information is transmitted to the control unit 63.

At the time of the switching operation, the switching control unit 63 outputs a braking command to the motor driving unit 62 based on the information from the sensor unit 44, and the motor driving unit 62 turns on the relay The connection to the electric motor M operated by single-phase alternating current by the operation of 71, 72, 73 is cut off,
By actuation of the relays 76 and 77, a rectified current is supplied to the temporary winding of the electric motor M to perform excitation braking.

Therefore, the locking of the output link 38 to the turning position L ₁ can be sufficiently performed by the braking force and the set distance (depth) of the turning position L ₁ even if an impact such as passing of a vehicle is applied. Made with high reliability. In addition, if a pebble is caught between the tongue rail T and the main rail R, the operation can 30 stops in the middle of the conversion despite being driven, and the operation can 30 stops. Try to
Since the rack member 25 is about to be displaced by the conversion gear 20, the spring member 22 of the buffer mechanism 21 interposed therebetween bends to absorb the impact.

That is, the spring member 22,
22 is locked by being fitted to both the rack member 25 and the operation can 30, for example, the tong rail T
When the two members are relatively displaced due to halfway obstruction when changing from the normal position to the reverse position,
The rear wall and the rear wall of the fitting groove 33 of the movement can 30 attempt to approach each other, and the ends 23a, 2
3b are close to each other, and the plurality of flat springs 22a are respectively compressed to cushion the impact.

When changing in the opposite direction, the rack member 25 and the operation can 30 are displaced in the opposite direction, the operation starts from the displacement of the other lock piece 45, and the operation is reversed in the reverse order. As described above, the above-mentioned device can convert the tong rail T with high reliability, and furthermore, since the electric motor M operates in a single phase, a single unit usually prepared in a railway signal system is used. Power equipment such as a phase power supply and a power cable can be used as it is.

Further, since the point control device 60 brakes the motor M by excitation braking, control involving strict time management such as power generation braking is unnecessary, and simple control is sufficient. And the like can be a very simple and highly reliable configuration as described above. In performing the excitation braking of the motor, in the above-described embodiment, the case where a full-wave current is applied is shown. However, the rectified current in the present invention does not include a normal DC current, a full-wave current, and a half-wave current. Needless to say.

[0036]

According to the electric switch according to the present invention,
The switching operation can be performed with high reliability, and the power supply equipment such as a single-phase power supply and a power supply cable normally prepared in a railway signal system can be used as it is, and the configuration of the control device is simplified. This can contribute to the improvement of the reliability of the equipment related to the point machine and the improvement of the investment effect.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electric switch according to one embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration of a motor drive unit according to one embodiment of the present invention.

FIG. 3 is a diagram showing a contact position of an input link to an output link in the conversion lock device according to one embodiment of the present invention.

FIG. 4 is a plan view of a conversion lock device according to an embodiment of the present invention.

FIG. 5 is a plan view of the electric switch shown with the top cover removed in one embodiment of the present invention.

FIG. 6 is a plan view showing a branch and its vicinity according to an embodiment of the present invention;

FIG. 7 is a longitudinal sectional view of the main body of the electric pointing machine according to one embodiment of the present invention.

FIG. 8 is a longitudinal sectional view showing a driving mechanism according to an embodiment of the present invention.

9 is a sectional view taken along line VV in FIG.

FIG. 10 is a sectional view taken along line VI-VI in FIG. 8;

FIG. 11 is a view taken in the direction of arrow VII in FIG. 8;

[Explanation of symbols]

 P: branching device R: main rail T: tong rail M: electric motor 10: electric point machine body 12: drive mechanism 30: operation rod 35: conversion locking device 37: input link 38: output link 38a: engagement Recess 38b Stopper 60 Point control device 62 Motor drive 63 Point control

Continuing on the front page (72) Inventor Hirai et al. 1-4-1 Meieki Station, Nakamura-ku, Nagoya City Inside the Tokai Passenger Railway Co., Ltd. (72) Inventor Munetaka Takemoto 1-4-1, Meieki Station, Nakamura-ku, Nagoya City East (72) Inventor Yoshihiro Torimaru 1-4-1 Meieki Station, Nakamura-ku, Nagoya Tokai Passenger Railway Co., Ltd. (72) Minoru Tadokoro 2-29 Heiancho, Tsurumi-ku, Yokohama, Kanagawa Prefecture (1) Kyosan Seisakusho Co., Ltd. (72) The inventor Katsuka Otokawa 2-29, Heian-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Pref. (JP, A) JP-A-3-295901 (JP, A) JP-A-2-125587 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B61L 5/10

Claims (1)

(57) [Claims] 1. A tong rail for turning a tong rail between a localization and an inversion in a track branching device. An electric pointing machine comprising a driving mechanism for driving the operation rod and a point control device, wherein the driving mechanism is constituted by an electric motor operated by a single-phase alternating current; An engaging recess is formed at one end, and a stopper forming both edges of the engaging recess is formed, and the other end is connected to the tong rail, and the tong rail is shifted from a normal position where the tong rail is locked in a fixed position. An output link that is swingable to a turning position in which the output link is operated in reverse, one end is connected to the operation can, and the other end is disposed to face one end of the output link, and the operation of the operation can , The other end of the stopper An input that engages with the engaging recess from the state of contact with one side and swings so as to abut on the other of the stoppers, swings the output link from the normal position to the turning position, and holds the output link at the turning position. The input link abuts against the stopper portion, so that the output link can be sufficiently locked in the transition position even when the braking force of the brake is small. A position deeper than the engagement concave portion, wherein the point control device outputs a braking command when the conversion operation is completed, and a power supply to the electric motor during the conversion operation. When the braking command is issued, the electric motor is turned off, and the supply of power to the electric motor is cut off, and a rectifying current is supplied to the primary winding of the electric motor to perform excitation braking. To become a An electric point machine characterized by the following.