JP2002212902A - Railroad switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a railroad switch capable of preventing a switching defect of a branching device. SOLUTION: When a second lock piece 25 is driven in a state to slip a position between a notch section 18a and a projection 25a, pushing force for pushing the projection 25a against the notch section 18a does not forcedly push the projection 25a into the notch section 18a because a buffer spring 29a buffers the pushing force. When a position of the front end of a tongue rail finely moves by temperature variations or the passing of a train or the like, the side of the notch section 18a is strongly brought into contact with the side of the projection 25a to adhere to each other. Then, when an action lever 15 is operated in the direction D for switching the tongue rail, a cam follower 28b forcedly gets out of the notch section 18a parallel to an inclined plane by engaging with operation of the action lever 15. As a result, since the second lock piece 25 is moved in the direction D to forcedly get the projection 25a out of the notch section 18a, the fault in a switchover can be prevented from catching the projection 25a in the notch section 18a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch for converting and locking a railroad switch.

[0002]

2. Description of the Related Art Conventional electric bullet trains for Shinkansen trains include an operating rod that operates when changing tong rails, a main chain lock that operates in a direction perpendicular to the operating direction of the operating rod, and an operating rod. A secondary lock can that is arranged in front of and behind the main lock in parallel with the direction of movement of the main lock and operates integrally with the main lock, and a protrusion inserted into a cutout of the main lock and the secondary lock. , A drive unit that drives the lock piece, and a buffer spring that connects the lock piece and the drive unit. In this electric point machine for Shinkansen,
Two lock pieces are provided with two projections facing the main and secondary locks, and the projections are inserted from a direction perpendicular to the cutouts of the main and secondary locks. The lock pieces are arranged as possible. In this electric bullet point machine for Shinkansen, when the drive unit drives the lock piece with the position of the notch and the protrusion shifted, the buffer spring is used to prevent the protrusion from being forcibly inserted into the notch. The driving force generated by the driving unit is buffered.

[0003]

In a conventional electric bullet point machine for a Shinkansen, a locked state in which a projection is inserted into a notch is provided.
When the tip position of the tongue rail moves minutely due to a temperature change, passage of a train, or the like, the notch and the projection come into strong contact with each other and come into close contact with each other. As a result, when the resistance (adhesion force) between the notch and the projection is greater than the urging force of the buffer spring, the lock piece is driven via the buffer spring. The protruding part could not be pulled out, so that the protruding part was fitted in the notch, and there was a risk that the switch could not be changed.

[0004] It is an object of the present invention to provide a switch capable of preventing a switch from being unable to be switched.

[0005]

The present invention solves the above-mentioned problems by the following means. Note that description will be given with reference numerals corresponding to the embodiment of the present invention, but the present invention is not limited to this embodiment. Claim 1
The invention of the present invention relates to an operation can (15) that operates when the tong rails (3a, 3b) are converted, and a main chain that operates in directions (B, C) orthogonal to the operation directions (D, E) of the operation can. A lock can (17), a secondary lock can (18) arranged parallel to the main chain lock can before and after the moving direction of the operation can, and operating integrally with the main chain lock. The notch (17a) of the lock can and the notch (18) of the secondary lock can formed at a position different from the notch of the main lock can.
The lock piece (23) having the projections (24a, 25a) to be inserted into the locker (a) and the direction in which the projections are inserted into the cutouts of the main and secondary locks are opposite to each other. A driving unit (2) for driving the lock piece
6) wherein the lock piece comprises a first lock piece (24) having a projection (24a) inserted into a notch (17a) of the main chain lock, and the sub-lock. The protrusion (2) inserted into the notch (18a) of the can
5a) comprising a second lock piece (25), wherein the driving part inserts the projection into the cutout of the main chain lock when the tongue rail has completed the conversion, and the tongue rail is turned. The first drive unit (2) that drives the first lock piece in conjunction with the operation can so that the protrusion comes off from the notch of the main chain lock can when starting the operation.
7) and when the tongue rails have finished turning in the opposite direction, the projections are inserted into the cutouts of the auxiliary locking cans, and when the tongue rails start to convert from the opposite direction, the auxiliary locking device has been used. As the protrusion comes out of the notch of the can,
A second drive unit (28) for driving the second lock piece in conjunction with the operation can, wherein the first and second drive units are arranged when the positions of the notch and the protrusion are shifted; The driving force of the first and second lock pieces is buffered so as not to push the protrusion into the notch,
When the notch and the protrusion come into close contact with each other, the first protrusion is forcibly pulled out of the notch.
And a driving machine (13) for driving the second lock piece.

According to a second aspect of the present invention, in the turning machine according to the first aspect, the first and second driving portions include a cam (27a, 28a) formed on the operation can, and a cam (27a, 28a) formed on the operation can. A cam follower (27b, 28b) that engages with and disengages from the cam in accordance with the operation of the can, and guide grooves (27c, 28) formed in the first and second lock pieces.
c) and a roller (2) rotating and moving along the guide groove.
7d, 28d), a shock absorber (29) for damping the driving force of the first and second lock pieces, and a roller connected to one end and a shock-absorbing spring of the shock absorber to the other end. (29a), and a rotatable support arm (27e, 28e) for supporting the cam follower.

According to a third aspect of the present invention, in the switching machine according to the second aspect, when the tongue rail has completed the change, the first drive unit causes the cam follower to be moved by the urging force of the buffer spring. The support arm is rotated by engaging with the cam, and the first lock piece is driven while the roller is rotationally moved along the guide groove, and the projection is inserted into the cutout of the main chain lock. Then, when the tongue rail starts to change, the cam follower separates from the cam against the urging force of the buffer spring, the support arm reverses, and the roller rotates along the guide groove. While driving the first lock piece in the reverse direction,
The protrusion is forcibly pulled out from the notch of the main chain lock can, and the second drive unit causes the cam follower to move by the urging force of the cushioning spring when the tongue rail has finished turning in the opposite direction. The support arm is rotated by engaging with a cam, and the second lock piece is driven while the roller is rotationally moved along the guide groove, and the projection is inserted into the notch of the auxiliary lock can. When the tongue rail starts to change from the opposite direction, the cam follower separates from the cam against the urging force of the buffer spring, the support arm reverses, and the roller moves along the guide groove. The first lock piece is driven in the opposite direction while rotating, and the protrusion is forcibly pulled out from the notch of the auxiliary lock can, and the position of the notch and the protrusion is adjusted in the shock absorber. Gap State, when the first or the second locking piece is driven, a point lock device which is characterized by causing a pressing force pressing said projections on the notch buffered by the buffer spring.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a lock mechanism of a switch according to an embodiment of the present invention. FIG. 2 is a plan view of a turnout in which the switch according to the embodiment of the present invention is used. FIG. 3 is a plan view of a conversion mechanism of the switch according to the embodiment of the present invention. FIG.
FIG. 3 is a plan view showing a state in which the locking mechanism of the switch according to the embodiment of the present invention is locked in a fixed position. In the following, a state where the tong rails 3a and 3b shown in FIG. 2 are turned in the direction B is referred to as a localization, and a state where the tong rails 3a and 3b are turned in the direction C is referred to as an inversion.

The branching device 1 is a device for dividing one track into two or more tracks. The splitter 1 shown in FIG. 2 is a one-way splitter in which the reference line is a straight line and the branch line (another line) is a curve. The branching device 1 includes a point section 2, a crossing section (not shown) where the track intersects, and a lead section (not shown) connecting the point section 2 and the crossing section. In the direction of the branching device 1 shown in FIG. 2, the traveling direction of the vehicle (the direction A in the figure) is opposite from the point portion 2 to the crossing portion.

As shown in FIG. 2, the point portion 2 is composed of tongue rails 3a and 3b, which are convertible movable rails having sharpened end portions, and a basic portion where the end portions of the tongue rails 3a and 3b come into close contact with and separate from each other. Rails 4a, 4b, a floor plate 5 for movably supporting the tong rails 3a, 3b, a rolling rod 6 for converting the tong rails 3a, 3b, and a front for fixing the distance between the tips of the tong rails 3a, 3b. Rod 7
And a connecting rod 8 connected to the front rod 7,
A switch adjuster 9 for setting an adhesion force when the tong rails 3a and 3b are in close contact with the basic rails 4a and 4b;
Link 10 that operates at the time of conversion, and switch adjuster 9
And an escape crank 11 connected to the link 10. The point section 2 shown in FIG. 2 includes two sets of the switch adjuster 9 and the escape crank 11 and the like, and the tongue rails 3a,
This is a structure that converts 3b. In FIG. 2, illustration of an escape crank and the like connected to the distal end side of the link 10 is omitted.

The electric switch 13 is a device for converting and locking the point unit 2. The electric pointing machine 13 includes a conversion mechanism 14 shown in FIG. 3 and an operation can 15 shown in FIGS.
, A lock can 16 shown in FIGS. 1, 2 and 4, and a lock mechanism 22 shown in FIGS. 1 and 4. As shown in FIG.
The operation can 15 is installed so as to be operable in parallel to the positions a and 4b.

The conversion mechanism unit 14 is a device that operates the operation can 15 to convert the point unit 2. Conversion mechanism 1
4, an electric motor 14a for generating a driving force, a clutch 14b for transmitting and disconnecting the driving force of the motor 14a, a bevel gear 14c fixed to an output shaft of the clutch 14b, Bevel gear 14d meshing with bevel gear 14c, small gear 14e rotating integrally with bevel gear 14d, intermediate gear 14f meshing with small gear 14e, and small gear rotating integrally with intermediate gear 14f 14g, a conversion gear 14h that meshes with the small gear 14g, and a sector gear 14i that rotates integrally with the conversion gear 14h. The conversion mechanism 14 converts the rotational movement of the electric motor 14a into a linear movement of the operating rod 15.

The operation can 15 is a plate-like body which operates when the tong rails 3a and 3b shown in FIG. 2 are changed. As shown in FIG. 3, the operation can 15 includes a sector gear 14i.
And a connection hole 15b for connecting to the link 10 shown in FIG. The operation can 15 includes a link 10, an escape crank 11,
It is connected to the tongue rails 3a, 3b via the switch adjuster 9 and the switching rod 6, and converts the tong rails 3a, 3b by the driving force generated by the conversion mechanism unit 14. As shown in FIGS. 1 to 4, when the operation can 15 is operated in the D direction, the tongue rails 3 a and 3 b are operated in the B direction to change from the reverse position to the normal position (the position shown in FIG. 2).
When operating in the E direction, the tongue rails 3a, 3b
Operate in the direction to change from localization to inversion.

The lock can 16 is provided with tong rails 3a, 3b.
Is a member that locks the tip position after the conversion. Lock Can 1
6 is, as shown in FIG. 1 and FIG.
Secondary lock can 18, joint fitting 19, fixing members 20, 2
And 1. The lock can 16 is an operation can 1
It is arranged on the upper side of 5 at right angles to the operation can 15 and is connected to the front rod 7 shown in FIG.

The main lock 17 is a plate-like body connected to the front rod 7. As shown in FIG. 4, a notch 17a is formed below the main chain lock can 17. The main lock can 17 is moved in the operation direction (D direction and E direction) of the operation can 15.
Direction) (directions B and C).

The auxiliary lock can 18 is a plate-like body connected to the main lock can 17. The auxiliary lock can 18 is used for the operation can 15.
Are arranged in parallel with the main lock can 17 before and after in the moving direction of the main lock, and operate integrally with the main lock 17. On the lower side of the auxiliary lock can 18, a notch 18a is formed at a position different from the notch 17a of the main lock 17.

The joint fitting 19 is a member for connecting the connecting can 8 and the main lock 17 shown in FIG.
7 is fixed to the tip. The fixing member 20 connects the distal end of the main lock can 17 and the distal end of the auxiliary lock can 18, and the fixing member 21 includes a rear end of the main lock 17 and a rear end of the auxiliary lock 18. And a member composed of a fixing bracket, a bolt, a nut, and the like for connecting the above.

The lock mechanism 22 is a device for checking the tip positions of the tongue rails 3a and 3b after conversion. The lock mechanism 22 is, as shown in FIGS.
3 and a drive unit 26. Rock piece 2
3 is a projection (piece) 2 to be inserted into the cutouts 17a, 18a.
4a, 25a, the first lock piece 2
4 and a second lock piece 25. The driving unit 26 includes projections 24a, 25 on the notches 17a, 18a.
This is a mechanism for driving the first lock piece 24 and the second lock piece 25 such that the directions of inserting the “a” are opposite to each other. The driving section 26 includes a first driving section 27 and a second driving section 28.

The first lock piece 24 is a plate having a projection 24a inserted into the notch 17a, and the second lock piece 25 is a plate having a projection 25a inserted into the notch 18a. A projection 24a is formed on the upper side of the first lock piece 24 near the distal end in the length direction, and on the upper side of the second lock piece 25, a projection 24a is formed.
A protruding portion 25a is formed closer to the end in the length direction. First lock piece 24 and second lock piece 25
Are arranged along the operation direction of the operation can 15 so that the projections 24a, 25a enter the notches 17a, 18a from a direction orthogonal to the operation direction of the lock can 16. First lock piece 24 and second lock piece 25
Is movably supported by a guide member (not shown), and operates between the operation can 15 and the lock can 16 in the same direction as the moving direction of the operation can 15. Notch 17a,
When the tong rails 3a, 3b shown in FIG.
Are positioned and adjusted by the fixing members 20 and 21 so that the center of the notch 17a and the center of the notch 17a coincide with each other.

The first driving section 27 includes the tong rails 3a, 3
When b has completed the conversion, the notch 17a has a projection 24a.
So that the projection 24a comes out of the notch 17a when the tongue rails 3a and 3b start to be converted.
This is a mechanism for driving the first lock piece 24 in conjunction with the operation of the operation can 15. When the tong rails 3a and 3b complete the reverse direction, the second driving unit 28 starts the notch 1
8a, the projection 25a is inserted into the tongue rails 3a, 3b.
The second lock piece 25 is driven such that the protrusion 25a comes out of the notch 18a when the switch starts to change from the opposite direction. When the positions of the notches 17a, 18a and the protrusions 24a, 25a are shifted, the first driver 27 and the second driver 28 move the protrusions 24a, 2a to the notches 17a, 18a.
The driving force of the first lock piece 24 and the second lock piece 25 is buffered (buffered lock) so as not to push the 5a. The first driving unit 27 and the second driving unit 28
The first lock piece 24 and the second lock piece 25 are driven (forced) so that the protrusions 24a, 25a are forcibly pulled out from the notches 17a, 18a when the protrusions 24a, 25a come into close contact with the protrusions 24a, 25a. Unlock). The first drive unit 27 and the second drive unit 28 include cams 27a and 28a,
Cam followers 27b and 28b and guide grooves 27c and 28
c, rollers 27d and 28d, and support arms 27e and 2
8e and a shock absorber 29.

The cams 27a and 28a are cam grooves formed in the operation can 15. The cam 27a is formed on one side of the operation can 15, and the cam 28a is
5 is formed on the other side surface. The cam 27a is formed closer to the distal end than the center of the operation can 15, and the cam 28a is formed closer to the rear end than the center of the operation can 15. The cam 27a has a corner surface formed on the front end side and an inclined surface formed on the rear end side, and the cam 28a has an inclined surface formed on the front end side and a corner surface formed on the rear end side. .

The cam follower 27b is a rotating body that engages with and disengages from the cam 27a in accordance with the operation of the operation can 15, and the cam follower 28b engages and disengages in the cam 28a in accordance with the operation of the operation can 15. It is. When the operation can 15 operates, the cam followers 27b and 28b come into rotational contact with the side surface of the operation can 15, and the cams 27a and 28b
The cams 27a and 28a engage with the falling cams 27a and 28a from the inclined surfaces of the cams 27a and 28a, and are separated from the cams 27a and 28a.

The guide groove 27c is provided in the first lock piece 24.
The guide groove 28c is a linear groove formed at a predetermined depth along the width direction above the second lock piece 25. The guide groove 28c is a linear groove formed at a predetermined depth along the width direction. . The guide groove 27c is formed closer to the rear end than the center of the first lock piece 24, and the guide groove 28c is formed closer to the front end than the center of the second lock piece 25.

The roller 27d is a rotating body that rotates and moves along the guide groove 27c.
8c is a rotating body that rotates and moves along 8c. Roller 27d
Drives the first lock piece 24 by rotating along the guide groove 27c, and drives the second lock piece 25 by rotating the roller 28d along the guide groove 28c.

The support arm 27e has a cam follower 27b.
The roller 27d is connected to one end and the shock absorber 29 is connected to the other end.
Are connected. Support arm 28e
Is a rotatable stepped crank that supports the cam follower 28b, a roller 28d is connected to one end,
The buffer spring 29a of the buffer 29 is connected to the other end. The support arms 27e, 28e are fixed shafts 27f, 2
8f, lower arm portions 27g and 28g, and upper arm portions 27h and 28h. Support arm 27
e and 28e are cam followers 27b and 28b
The operation of the first lock piece 24 and the second lock piece 25 is controlled by the minute rotation when engaging and disengaging with a and 28a.

The fixed shafts 27f and 28f are connected to the electric
3 is a member fixed to the bottom surface of the casing (not shown). As shown in FIG. 4, the fixed shaft 27f is
5, and the fixed shaft 28 f is disposed near the first lock piece 24. Lower arm 27
g and 28g are members that rotatably support the cam followers 27b and 28b. A cam follower 27b is rotatably connected to a base end of the lower arm 27g, and a cam follower 2 is connected to a base end of the lower arm 28g.
8b is rotatably connected. Upper arm 27
h and 28h are members that rotatably support the rollers 27d and 28d. A roller 27d is rotatably connected to a tip of the upper arm 27h, and a roller 28d is rotatably connected to a tip of the upper arm 28h. Lower arm 27g and upper arm 27h
Are connected stepwise so as to rotate about a fixed shaft 27f in a state of being bent substantially in an L shape, and the lower arm portion 28g and the upper arm portion 28h are fixed in a state of being bent in a substantially L shape. They are connected stepwise so as to rotate about the shaft 28f.

The shock absorber 29 is a mechanism for damping the driving force of the first lock piece 24 and the second lock piece 25. As shown in FIG. 4, the shock absorber 29 includes a buffer spring 29a.
Is provided inside. The buffer spring 29a is a coil spring that constantly generates an urging force (pressure) in a direction in which the cam followers 27b and 28b are pressed against the side surface of the operation can 15. The cushioning spring 29a connects the projections 24a, 25a to the notch 17
a, 18a function as a power source when inserted. The buffer spring 29a is configured such that one end 29b is connected to the lower arm 27.
g, and the other end 29c is connected to the tip of the lower arm 28g.

Next, the operation of the switch according to the embodiment of the present invention will be described. FIG. 5 is a plan view showing a state where the lock mechanism of the switch according to the embodiment of the present invention is unlocked in a fixed position. FIG. 6 is a plan view showing a state in which the locking mechanism of the switch according to the embodiment of the present invention is in the process of being changed from the normal position to the reverse position. FIG. 7 is a plan view showing a state in which the locking mechanism of the switch according to the embodiment of the present invention is locked at an opposite position. FIG. 8 is a plan view showing a state in which the lock mechanism of the switch according to the embodiment of the present invention cannot be changed due to the reverse position of the lock mechanism.

(State Locked in Orientation) As shown in FIG. 2, when the tongue rails 3a and 3b have completed the conversion to the orientation and the tongue rail 3a and the basic rail 4a are in close contact with each other, as shown in FIG. The cam follower 27b is
a, the support arm 27e is rotated clockwise by a small angle around the fixed shaft 27f. In this state, the side surface of the guide groove 27c is pushed in the direction D by the roller 27d, the first lock piece 24 moves in the direction D, and the projection 24a is inserted into the notch 17a. On the other hand, the cam follower 28b comes out of the cam 28a and is in pressure contact with the side surface of the operation can 15 by the urging force of the buffer spring 29a.

When the electric motor 14a shown in FIG. 3 is driven, the gear train such as the bevel gear 14c rotates through the clutch 14b, and the gear 14j rotates clockwise while the rack 15a rotates. And the operation can 15 moves in the E direction. As a result, the driving force is transmitted to the point rod 6 via the link 10 and the escape crank 11 shown in FIG. 2 so that the point rod 6 operates in the C direction,
The tong rails 3a and 3b start to change from the localization to the inversion. As shown in FIG. 5, when the operation can 15 starts operating in the direction E, the cam follower 27b rotates and the cam 2 moves.
7a, moves relatively along the inclined surface of 7a, comes out of the cam 27a, and opposes the urging force of the buffer spring 29a.
, The support arm 27e rotates counterclockwise by a small angle. At this time, since the buffer spring 29a is pulled by the minute rotation of the support arm 27e, the cam followers 27b and 28b and the side surface of the operation can 15 come into strong press contact, and the cam followers 27b and 28b are brought into contact with the cams 27a and 2b.
8a is applied to the cam followers 27b, 2b.
8b. When the support arm 27e rotates slightly counterclockwise, the roller 27d rotates and moves along the guide groove 27c, and the side surface of the guide groove 27c is pushed in the E direction by the roller 27d. As a result, the first lock piece 24
Moves in the direction E, the protrusion 24a comes out of the notch 17a, and the tongue rails 3a and 3b are in a state where they can be changed from the normal position to the reverse position.

As shown in FIG. 6, when the operating rod 15 further moves in the direction E, the tong rails 3a and 3b shown in FIG. After the almost conversion, the tongue rail 3b tries to adhere to the basic rail 4b. Tong rail 3a, 3
When b changes to the direction C, the front rod 7 follows and operates, and as shown in FIG.
, The lock can 16 is passively operated in the direction C. Immediately before the tong rails 3a and 3b complete the conversion, the inclined surface of the cam 28a approaches the cam follower 28b and
It is in a state just before fitting into a.

When the tongue rails 3a and 3b shown in FIG. 2 complete the conversion to the inverted position and come into close contact with the tongue rail 3b and the basic rail 4b, the operation can 15 is stopped and stopped. The lock can 16 shown in FIG. 6 stops. Immediately before the operation can stop, the center of the notch 18a and the projection 25a
Is substantially aligned with the center of the urging spring 29a.
, The cam follower 28b fits into the cam 28a, and the support arm 28e rotates clockwise by a small angle around the fixed shaft 28f. As a result, since the side surface of the guide groove 28c is pushed in the direction E by the roller 28d, the second lock piece 25 moves in the direction E and the projection 25a is inserted into the notch 18a, and the tongue rail 3a shown in FIG. , 3b are inverted and inverted. At this time, as shown in FIG.
b is in pressure contact with the side surface of the operating can 15 by the urging force of the buffer spring 29a.

As shown in FIG. 8, the center of the notch 18a and the center of the projection 25a do not coincide with each other, and their positions are slightly shifted. In this state, the projection 25a cannot be inserted into the notch 18a. However, the cam follower 28b has the cam 28
When a reaches, the cam follower 28b tries to fall into the cam 28a by the urging force of the buffer spring 29a, and the support arm 28e tries to rotate clockwise. as a result,
The side surface of the guide groove 27c is slightly pushed in the direction E by the roller 27d, the first lock piece 24 moves in the direction E, and the notch 18a comes into contact with the projection 25a and is pressed. At this time, the pressing force (pressing force) generated between the projection 25a and the notch 18a acts in a direction to pull the buffer spring 29a against the urging force of the buffer spring 29a. As a result, the pressing force for pressing the projection 25a against the notch 18a is buffered by the buffer spring 29a, so that the projection 25a is forcibly pushed into the notch 18a, and the corner of the projection 25a bites the side surface of the notch 18a. I won't.

(Forced unlocking) As shown in FIG. 7, when the lock mechanism 22 is locked in an inverted position, the tip positions of the tong rails 3a and 3b shown in FIG. , The side surface of the notch 18a and the side surface of the projection 25a come into strong contact with each other. However, the tong rails 3a, 3 shown in FIG.
When the operating rod 15 moves in the D direction as shown in FIG. 7 in order to move b in the C direction to change from the reverse position to the localization, the cam follower 28 b
Is forced out of the cam 28a along the inclined surface. As a result, the second lock piece 25 moves in the D direction, and the protrusion 25a is forced out of the notch 18a.
The projection 25a is not caught by the notch 18a, so that it is impossible to change the position.

In the above description, the operation of the lock mechanism 22 when the tong rails 3a, 3b shown in FIG. 2 change from the normal position to the opposite position has been described. However, the tongue rails 3a, 3b change from the opposite position to the normal position. When switching, the operation can 15 shown in FIGS. 4 to 7 operates in the direction D, and the lock mechanism 22 performs the reverse operation.

[0036] The point machine according to the embodiment of the present invention includes:
The following effects are obtained. (1) In this embodiment, when the positions of the notches 17a, 18a and the protrusions 24a, 25a are shifted, the notch 17
The first drive unit 27 and the second drive unit 28 buffer the driving force of the first lock piece 24 and the second lock piece 25 so that the protrusions 24a and 25a are not pushed into the a and 18a. As a result, the notches 17a, 18a are replaced with the protrusions 24a,
Abrasion caused by galling of the lock 25a is prevented, so that the detection performance of the lock mechanism 22 can be prevented from lowering.

(2) In this embodiment, the notches 17a, 1
When the protrusions 24a and 25a come into close contact with each other, the first drive unit 27 and the second drive unit 28 are connected to the first lock piece 24 so that the protrusions 24a and 25a are forcibly pulled out from the cutouts 17a and 18a. And the second lock piece 25 is driven. As a result, the projections 24 are formed in the notches 17a and 18a.
a, 25a can be prevented from being caught, and it is possible to prevent occurrence of an inability to convert.

(3) In this embodiment, the main lock can 17 and the auxiliary lock can 18 are arranged before and after in the moving direction of the operation can 15, and the notches 17a, 18a have the protrusions 24a,
The first drive unit 27 and the second drive unit 28 drive the first lock piece 24 and the second lock piece 25 such that the directions of inserting the 25a are opposite to each other. As a result, the operation of the lock mechanism 22 can be checked with the upper cover of the electric switch 13 opened, thereby facilitating inspection and repair during maintenance.

The present invention is not limited to the embodiments described above, but various modifications or changes can be made as described below, and these are also within the scope of the present invention. (1) In this embodiment, the notch 1
The projection 25a is inserted into the notch 18a when the projection 24a is inserted into the notch 7a and turned to the opposite position.
The relationship between the insertion relationship between 7a, 18a and the projections 24a, 25a and the conversion position may be reversed. Further, in this embodiment, the notch 17a is formed near the rear end of the main lock can 17, and the notch 18a is formed near the front end of the sub-lock can 18. It may be reversed.

(2) In this embodiment, the first drive unit 27 and the second drive unit 28 also serve as one buffer 29 to reduce the number of components. However, two buffers having the same structure are used. It may be installed so that one end of the buffer spring is connected to the fixing member and the other end is connected to the support arm. Further, in this embodiment, the buffer spring 2 is used as a source of the urging force of the buffer 29.
Although 9a has been described as an example, a hydraulic cylinder or the like may be used.

(3) In this embodiment, the support arm 27
Although the cam followers 27b and 28b are provided on the sides e and 28e and the cams 27a and 28a are provided on the operation can 15 side, these may be provided on the opposite side. In this embodiment,
Roller 2 that rotates along guide grooves 27c and 28c
7d and 28d have been described as examples, but the rollers 27d and 28d
28d may be replaced with a moving body such as a slider,
A mechanism in which a moving body such as a slider slides along a guide member such as a guide shaft may be used.

(4) In this embodiment, the rollers 27d and 2d
Although the case where 8d is cylindrical has been described as an example, any shape may be used as long as it is slidable along the guide grooves 27c and 28d.
Further, in this embodiment, an electric switch for Shinkansen has been described as an example, but the present invention can also be applied to an electric switch used for a conventional line or the like.

[0043]

As described above, according to the present invention, when the positions of the notch and the projection are shifted, the first and second lock pieces are driven so that the projection is not pushed into the notch. The first and second lock pieces are driven so that the force is buffered and the protrusion is forcibly pulled out of the notch when the notch and the protrusion come into close contact with each other. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view of a lock mechanism of a switch according to an embodiment of the present invention.

FIG. 2 is a plan view of a turnout in which the switch according to the embodiment of the present invention is used.

FIG. 3 is a plan view of a conversion mechanism of the switch according to the embodiment of the present invention;

FIG. 4 is a plan view showing a state in which the lock mechanism of the switch according to the embodiment of the present invention is locked in a fixed position.

FIG. 5 is a plan view showing a state in which the lock mechanism of the switch according to the embodiment of the present invention is unlocked in a fixed position.

FIG. 6 is a plan view showing a state in which the lock mechanism of the switch according to the embodiment of the present invention is in the process of being changed from the normal position to the reverse position.

FIG. 7 is a plan view showing a state in which the locking mechanism of the switch according to the embodiment of the present invention is locked at an opposite position.

FIG. 8 is a plan view showing a state in which the lock mechanism of the switch according to the embodiment of the present invention cannot be changed due to a reverse position of the lock mechanism;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Switcher 2 point part 3a, 3b Tong rail 4a, 4b Basic rail 13 Electric point switch 14 Conversion mechanism part 15 Operation rod 16 Lock rod 17 Main chain lock rod 18 Secondary lock rod 17a, 18a Notch part 22 Chain Lock mechanism part 23 Lock piece 24 First lock piece 25 Second lock piece 24a, 25a Projection part 26 Drive part 27 First drive part 28 Second drive part 27a, 28a Cam 27b, 28b Cam follower 27c, 28c Guide groove 27d, 28d Rollers 27e, 28e Support arms 27f, 28f Fixed shaft 29 Buffer 29a Buffer spring

Claims (3)

[Claims] 1. An operating rod that operates when changing a tong rail, a main lock that operates in a direction perpendicular to the operating direction of the operating rod, and the main lock that moves before and after the moving direction of the operating rod. The secondary lock can is arranged in parallel with the can and operates integrally with the main lock can. The notch of the main lock and the notch of the main lock are formed at different positions. A lock piece having a projection to be inserted into the notch of the secondary lock can, so that the directions of inserting the projections into the notch of the main lock and the secondary lock can are opposite to each other, A drive unit for driving the lock piece, wherein the lock piece has a first projection having a projection inserted into a notch of the main chain lock.
A lock piece, and a second part having a projection inserted into a notch of the auxiliary lock can.
A lock piece, wherein the drive unit is configured such that when the tongue rail ends the conversion, the protrusion is inserted into a cutout portion of the main chain lock can, and the main chain lock starts when the tongue rail starts conversion. A first drive unit that drives the first lock piece in conjunction with the operation can so that the protrusion comes off from the notch of the can; and the sub-chain when the tongue rail finishes turning in the opposite direction. The projection is inserted into the notch of the lock can, and when the tongue rail starts to change from the opposite direction, the projection comes out of the notch of the auxiliary lock can, in conjunction with the operation can. A second drive unit that drives the second lock piece, wherein the first and second drive units are configured to attach the protrusion to the cutout when the position of the cutout and the protrusion is shifted. So that it does not And to buffer the driving force of the second lock piece, when said cut-out portion and the projecting portion are in close contact, as pulled forcing the protruding portion from the notch, the first
And a driving device for driving the second lock piece. 2. The switching machine according to claim 1, wherein the first and second driving units are configured to control the cam formed on the operation can and the cam according to the operation of the operation can. A cam follower that engages and disengages; a guide groove formed in the first and second lock pieces; a roller that rotates and moves along the guide groove; and a driving force of the first and second lock pieces. And a rotatable support arm connected to one end of the roller and the other end connected to a buffer spring of the buffer and supporting the cam follower. Point machine. 3. The switching machine according to claim 2, wherein the first drive unit engages the cam follower with the cam by the urging force of the buffer spring when the tongue rail ends the change. The support arm is rotated, the first lock piece is driven while the roller is rotationally moved along the guide groove, and the projection is inserted into a cutout of the main chain lock. When the rotation starts, the cam follower separates from the cam against the urging force of the buffer spring, the support arm rotates in the reverse direction, and the first roller rotates while moving along the guide groove. The lock piece is driven in the opposite direction to forcibly pull out the protrusion from the notch of the main chain lock can. The second drive unit is configured to: The cam follower is engaged with the cam by the urging force of the spring, the support arm rotates, and the roller is driven to rotate along the guide groove to drive the second lock piece. Insert the projection into the notch, when the tong rail starts to switch from the opposite direction,
The cam follower is disengaged from the cam against the urging force of the buffer spring, the support arm is rotated in the reverse direction, and the first lock piece is driven in the reverse direction while the roller rotates along the guide groove. The forcible withdrawal of the protrusion from the notch of the auxiliary lock can, and the shock absorber has the first or second lock piece in a state where the position of the notch and the protrusion is shifted. A driving force that presses the projection against the notch when the driving is performed, is buffered by the buffer spring.