JP2000289618A - Switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify structure of a switch for lightening its weight, and to detect an overload at the time of inconvertibility by an obstacle or the like for performing an automatic stop. SOLUTION: This switch comprises a servomotor 32, a ball screw 34 connected to the servomotor 32, a carrier unit 36 screwed to the ball screw 34, a guiding means adapted to displace horizontally the carrier unit 36, a movable rod 38 having an oblong actuation hole a guide plate 42 having a crank-shaped guide hole, a driving shaft 41 fixed in the guide hole of the guide plate 42 and in the actuation hole of the movable rod 38 for driving the movable rod 38, a driving link 40 having the carrier unit 36 and the driving shaft 41 connected, a lock rod 47 having two lock grooves, two lock pieces 48a and 48b fixably mounted in the lock grooves of the lock rod 47, and a lock block 46 mounted on the carrier unit 36 adapted to have the lock pieces 48a and 48b fitted into the lock grooves.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching machine for switching points by moving a tongue rail with respect to a track rail of a railway line.

[0002]

2. Description of the Related Art An example of the structure of a conventional general point machine is shown in FIGS. FIG. 17 is a top view of the entire structure, and FIG. 18 is a perspective view showing the structure of the operation part of the operation can and lock can, which are the main parts. 17 and 18, 1 is a motor, 2 is a bevel gear that converts the rotation of the motor in the horizontal direction into rotation in the horizontal direction, 3 is an intermediate gear that reduces the number of rotations,
4 is a conversion gear, 5 is a conversion roller provided on the conversion gear 4, 6 is an operation can, 7 is a lock can made of two lock rods 7a and 7b having a rectangular cross section. Stick 7
It is assembled so that a gap 8 is formed between a and 7b. Reference numeral 9 denotes a cam bar, which is two symmetrical right and left cam bars.
a, 9b. 10a and 10b are lock pieces which are respectively connected to the cam bars 9a and 9b. 11 is a control circuit, 12 is a control relay, 13 is a conversion display board, 14 is a push button switch, and 15 is an external terminal board.

FIGS. 19 (a) and 19 (b) show the above-mentioned conversion roller 5, operation can 6, cam bars 9a and 9b, and lock piece 1 respectively.
FIG. 2 is an assembled perspective view of Oa, 10b and a lock can 7 and a partially exploded perspective view thereof, and details thereof will be described. First, operation can 6
In the direction substantially intersecting with the operation direction, the conversion cam surface 1
6 and an escape cam surface 17 are provided, and on the opposite side of the groove, step portions 18 which are locked by lock pieces 10a and 10b are provided on the left and right. Also lock can 7
Lock grooves 19a, 19b, which are thick portions (opposite directions) at the tips of lock pieces 10a, 10b, are engaged in gaps 8 between lock bars 7a, 7b.
0b is formed. The cam bars 9a and 9b have conversion cam surfaces 21a and 21b and escape cam surfaces 22a and 2b.
2b is formed.

[0004] Next, the outline of the operation of the above-mentioned conventional point machine will be described with reference to FIGS. 20 (a) (b) to 24 (a) (b). 20A to 24A are perspective views,
FIGS. 20 to 24B are top views. FIG. 20 shows a localized or inverted state. If this state is assumed to be a localized state, the rotation of the conversion gear 4 to the left causes the conversion roller 5 to be positioned at the end of the escape cam surface 22a of the cam bar 9a. That is, the lock piece 10a is pulled to the left, the rear end outside 23a of the lock piece 10a engages with the step 18 of the operation can 6, and the lock 19a engages with the lock groove 20a of the lock can 7. The operation can 6 and the lock can 7 are both in the locked state.

FIG. 21 shows a state where the operation can 6 and the lock can 7 are unlocked. That is, when the conversion gear 4 is rotated by the rotation of the motor 1 and the conversion roller 5 performs an arc operation, each of the conversion cam surfaces 1 from the escape surface 17 of the operation can 6 and the escape surface 22a of the cam bar 9a.
6 and 21a, the cam bar 9a is pushed rightward so that the rear end outside 23a of the lock piece 10a
From the stepped portion 18 and the tip lock portion 19a thereof.
Are released from the lock groove 20a of the lock can 7 and both are unlocked.

FIG. 22 shows a conversion state, in which the conversion cam surface 1 of the operation can 6 is formed by the progress of the circular operation of the conversion roller 5.
6 is moved downward, the operation can 6 is moved, and with this movement, the lock can 7 also moves downward. At this time, the conversion roller 5 moves from the conversion cam surface 21a of the cam bar 9a to the conversion cam surface 21b of the cam bar 9b.
And the lock piece 10 does not operate.

FIG. 23 shows a state in which the transition state is shifted to the inverted locking state, that is, when the conversion roller 5 is moved from the operation can 6 and the conversion cam surfaces 16 and 21b of the cam bar 9b to the respective escape surfaces 1 and 2.
FIG. 24 shows a state immediately before shifting to the operation bar 7 and 22b, and FIG.
7 and 22b, the cam bar 9b is pulled back to the left to lock the step 18 of the operation can 6 at the rear end outside 23b of the lock piece 10b, and the lock 19b is locked by the lock groove of the lock can 7. Engaging with 20b, both the operating can 6 and the locking can 7 are in the inverted position and locked. In the above, the conversion operation from the localization to the inversion has been described. However, the conversion from the localization to the localization is performed by the reverse operation.

[0008] Next, as a point machine having a structure different from the above-mentioned point machine currently in practical use, Japanese Patent Application Laid-Open No. H7-100011 is disclosed.
There has been proposed a pointing machine having a structure in which a ball screw described in Japanese Patent Application Laid-Open Publication No. H11-15095 is rotated by a motor to drive an operation can. This point machine has a cam groove having a shape in which the rotation of a motor rotates a ball screw via a reduction gear mechanism of four gears, and both ends are offset by a predetermined distance to a side opposite to an intermediate part. The operation can is linearly moved in the front-rear direction by rotating the ball screw, and the linear motion is turned 90 degrees by using an escape crank mechanism to move the tongue rail, and the slide member is inserted into the cam groove of the operation can. Engage, the slide member is moved by the displacement of the offset of the cam groove, and this movement drives the lock piece connected to the slide member, thereby positioning the lock can arranged perpendicular to the operation can or The inverted state is locked.

[0009]

In the former of the prior art described above, the rotation of the motor is reduced by using a plurality of gears, and the moving distance of the tong rail is controlled by a conversion roller provided on the conversion gear. Therefore, a plurality of gears are required, which increase the size of the conversion gear and are robust from the viewpoint of strength. For this reason, the weight of the point machine becomes 400 kg or more, and there is a problem that a great deal of labor is required for transporting and installing the point machine.

Although the latter uses a ball screw, it is necessary to greatly reduce the number of revolutions of a normal motor, for example, an induction motor. This embodiment also requires a reduction gear mechanism composed of four gears. Things. Therefore, it is considered that the assembling work is complicated due to the complicated speed reduction mechanism, and it is difficult to significantly reduce the size and weight of the point machine. The present invention aims to reduce the size and weight by driving a ball screw with a servomotor, and to provide a small and lightweight servomotor with an output of the operation can to the drive distance of the operation can in the range from near localization and inversion to locking. Therefore, the tongue rail can be securely locked to the track rail. Further, by using a servomotor, a function of detecting an overload and automatically stopping the motor when it is impossible to convert due to an obstacle or the like is achieved.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a rolling machine for operating a tongue rail on a track rail in a fixed or inverted position, comprising a servomotor, a ball screw connected to the servomotor, and a ball screw. A carrier unit which is screwed and performs a moving operation by rotation of the ball screw; a guide means provided in parallel with the ball screw with respect to the carrier unit so that the moving operation of the carrier unit can be performed horizontally; An operation canister having a vertically long operation hole in a direction intersecting the direction and having one end connected to the tongue rail, and a crank-shaped guide hole having an intermediate straight portion formed to be long, and the operation can be slid. Two guide plates fixed to the frame so as to be clamped, each guide hole of the two guide plates, and an operation hole of the operation can A drive shaft that is inserted and moves along the guide hole of the guide plate to operate the operation rod; a drive link provided to transmit the movement operation of the carrier unit to the drive shaft; A locking can which has two locking grooves provided at a required interval in the direction and is connected to the tongue rail; and the locking can operates based on the operation of the tong rail, and the operation can The two lock pieces, which are located at positions opposite to one of the lock grooves of the lock can when actuated in the normal position or the inverted position, respectively, and are provided movably in the lock groove direction. When the carrier unit has actuated the operating can to a normal or inverted position, the lock piece is fitted into a corresponding one of the two locking grooves of the locking can. Those made up of a lock block provided on said carrier unit to for moving the.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 16 are drawings for explaining a point machine according to the present invention, and FIG. 1 is a structural view for explaining the whole point machine. ) Is a top view with the lid opened, FIG. 1B is a front view, and FIG. 2 is a side view showing two states, a closed state and an opened state. FIG. 3 is a system configuration diagram, FIG. 4 shows a driving mechanism of the operation canister, FIG. 4 (a) is an assembled perspective view, and FIG. 4 (b) is an exploded perspective view thereof. 5 is a perspective view of the drive shaft shown in FIG. 4, FIG. 5 (a) is an exploded view, and FIG. 5 (b) is an assembly view. FIG. 6 is a cross-sectional view showing a state where the drive shaft is mounted on an operation can or the like. FIG. 7 is a view showing the shape of the guide hole of the guide plate for guiding the drive shaft.

FIG. 8 is a perspective view of a lock mechanism of the lock can.
8A is an overall configuration diagram, FIG. 8B is an assembly diagram of a lock piece portion, and FIG. 8C is an exploded view of the lock piece portion. FIG. 9 is a perspective view of a mechanism for detecting the amount of out-of-lock during the locking operation of the locking can. FIG. 9 (a) is an assembled view, and FIG. 9 (b).
Is an exploded view. FIGS. 10 to 12 are top views for explaining the operation of the operation can of the switch and the operation of the lock can.
0 (a) is a diagram showing a locked state in which the pointing machine is located in the localization or inversion position, and this state is temporarily set as the localization. FIG. 10 (b) is a diagram in which the device has been released from the stereotaxic state and has shifted to the unlocked state, and FIG. 11 (a).
FIG. 11B shows a state during the point change operation, and FIG.
FIG. 12 is a diagram showing a transition from the point changing operation to the locked state, and FIG. 12 is a diagram showing a state where the point machine has shifted to the inverted locked state.

FIG. 13 and FIG. 14 are perspective views for explaining the operation of the lock can and the lock piece. FIG. In the figure showing the locked state, this state is temporarily set as the localization. FIG.
FIG. 3 (b) is a diagram showing a state in which the terminal device has been released from the stereotactic state and shifted to an unlocked state, FIG.
FIG. 14 (a) is a diagram showing a state immediately before shifting from the point changing operation to the locked state, and FIG. 14 (b) is a view showing a state where the locking machine is located at the opposite position and the locking can is locked. FIG.
FIG. 15 is a characteristic diagram showing the mechanism efficiency of the operation can. FIG.
6 is a time chart showing the operation of the switch in a time series.

1 to 3, reference numeral 31 denotes a frame, 3
Reference numeral 2 denotes an AC servomotor which rotates in a required direction according to a control signal from a control box 33 including a servo driver and the like. Reference numeral 34 denotes a ball screw connected to the AC servomotor 32 via a coupling 35. 36 is a carrier unit screwed to the ball screw 34, 3
Reference numeral 7 denotes a guide shaft provided in parallel with the ball screw 34 and penetrating the carrier unit 36 to guide the movement thereof. Reference numeral 38 denotes an operation rod for driving the tongue rail 39 shown in FIG. 3, and reference numeral 40 denotes a drive link connecting the carrier unit 36 and a drive shaft 41 for driving the operation rod 38. Although the illustrated drive link 40 is formed in a curved shape, the operation is the same even if it is formed in a straight line. Reference numeral 42 denotes a guide plate for guiding the operation of the drive shaft 41. A guide hole 43 having a substantially crank shape shown in FIG. Both ends of the ball screw 34 are rotatably supported by bearings provided on the frame 31.

Reference numeral 44 denotes a link shaft for rotatably attaching the drive link 40 to the carrier unit 36, and reference numeral 45 denotes a spacer shaft for allowing the operation can 38 to be slidably mounted on the guide plate 42. 46 is a lock block provided on the side surface of the carrier unit 36, and 47 is an assembly of two lock bars 47a, 47b having one end connected to a tong rail and having a rectangular cross section so that a gap 60 is formed. Can lock the lock stick 47
The locking grooves 59a, 5b are provided on the gap 60 side of
9b is provided. 48a and 48b are lock cans 47
Is a lock piece that locks. 49a, 49b are lock detectors for detecting the locked state of the lock can, 50a, 50
Reference symbol b denotes a linear sensor (a linear displacement sensor using a magnetoresistive element and a mug) fixed to the frame 31 by a fixture for detecting the operation state of the lock can, and is attached to the lock rods 47a and 47b of the lock can 47. Detection metal fittings 51 fixed respectively
The stop position of the lock can is detected based on the positional relationship between the lock a and the lock 51b.

52 is a lid, 53 is a push button switch, 5
4 is a control relay, 55 is a connector, 56 is a terminal block, 57
Is a hand-operated handle shaft, and 58 is a hand-operated safety device. The above-described guide shaft 37 is guide means provided in parallel with the ball screw 34 to move the carrier unit 36 horizontally, but the guide shaft 3
7 is provided on both sides of the ball screw 34, or slides in a state in which a block having a ball retainer circulating on a rail provided with a plurality of rolling grooves for the ball is fitted.
Guide means or the like called "linear guide" (registered trademark) may be used. Push button switch 5
Reference numeral 3 denotes a switch for confirming the operation of the switch when the switch is installed. The switch 3 reverses the command signal from the signal point. It starts to change to the side, but when it is released, it returns according to the command signal of the signal station.

Next, the switching / locking mechanism and the basic operation of the operation can 38 of the switch according to the present invention will be described with reference to FIGS.
First, an AC servo motor 32 is operated according to an instruction signal from a signal station.
When is rotated in a certain direction, it is transmitted to the ball screw 34 via the coupling 35. The ball screw 34 converts the rotational motion into a linear motion, and the driving force moves the two drive links 40 having one end connected to the upper and lower surfaces of the carrier unit 36, as shown in FIG. Also,
A drive shaft 41 is rotatably attached to the other end of the drive link 40, and moves left and right along a guide hole 43 of two guide plates 42 fixed to the frame 31, and the two guide plates 42 Central bulging part 6 of the operating rod 38 slidably provided between
The operation can 38 is slid left and right through an operation hole 62 provided in the device 1.

The structure of the drive shaft 41 is as shown in FIG.
Is formed in a shape obtained by cutting four sides of a cylindrical portion. The engagement portion 64 of the guide plate 42 with the guide hole 43 is formed in two stages. That is, on both sides of the large-diameter shaft portion 63, an engagement shaft portion 65 formed in a shape in which both sides of the cylindrical portion are cut, and further on both outer sides, the reduced-diameter cylindrical portion 6 is formed.
6 are formed, and the roller follower 6 is provided on each of the cylindrical portions 66.
7 is inserted. This two-stage configuration works so that the roller follower 67 rolls to reduce the friction with the guide hole 43 of the guide plate 42 during the change of the point, and the drive shaft 41 has the chain formed at both ends of the guide hole 43. When the engagement shaft portion 65 enters the inner narrow portion 69 of the guide hole 43 when the lock member 68 is moved to the lock portion 68, the operation can 38 is fixed by the action of a bar between the operation can 38 and the guide plate 42. It is.

As described above, the drive shaft 41 is
The state in which the operation can 38 is moved to the lock portion 68 of FIG. 3 and the operation can 38 is locked is shown in the cross-sectional view of FIG. That is, the large diameter shaft portion 63 of the drive shaft 41 is engaged with the operation hole 62 of the operation can 38, and the roller follower 67 of the drive shaft 41 is engaged with a portion of the guide plate 42 having the same width as the guide hole 43. The cut portion of the engagement shaft 65 of the drive shaft 41 is engaged with the inner narrow portion 69 of the guide plate 42. As shown in FIG. 7, the shape of the guide hole 43 of the guide plate 42 is a point changing portion from the straight portion to the curved portion of the guide hole 43, and the locking portions 68 at both ends of the guide hole 43 are the operation cans 38. Is locked, and at the time of operation of the carrier unit 36 at this portion, the lock piece 48 is operated to lock the lock can 47 immediately after stopping.

As described above, on both side surfaces of the lock portion 68, about 1/2 of the plate thickness on the support side of the operation can 38 is formed as a narrow portion 69 having a slightly narrow width. The difference between the length of the locking portion 68a and the length of the locking portion 68b is that the left and right lock pieces 48a, 48 at the time of each locking are different.
This is to make the operation of b the same. That is, since the shape of the lock block 46 for operating the lock pieces 48a and 48b is symmetrical to the left and right, it is necessary to make the operating distances of the carrier units 36 for moving the lock block 46 at the time of each locking the same. Since the angle of the drive link 40 with respect to the movement line of the drive shaft 41 changes between the left side) and the opposite side (right side), the length of the lock portion 68a and the lock portion 68b is changed within a range in which the lock action can be achieved. Is what it is.

Next, the structure and basic operation of the lock of the lock can 47 will be described with reference to FIGS. 1 to 3, 8 and 9. As described above, when the operation can 38 is operated by the rotation of the servomotor 32 and the tongue rail 39 is operated, the lock can 47 is operated.
Also operates in conjunction with the operation of the operation can 38 via the tongue rail 39. At this time, the lock block 46 provided on the side surface of the carrier unit 36 for operating the operation can 38 also operates. This operation state will be described with reference to FIG. As shown in FIGS. 8B and 8C, the lock piece assembly 70 provided with the lock pieces 48a and 48b
On the upper side of the upright part of the lock piece holder 71 of the mold, a lock piece 4 is formed by a shaft 73 having a male screw part 72 at one end and a pressing spring 74 made of a coil spring.
Reference numeral 8 denotes an attached member. In the attached state, the lock piece 48 is urged in a direction away from the lock piece holder 71.

The shaft insertion hole 75 of the lock piece 48 is provided with a step for locking the head of the shaft 73 on one side and an enlarged diameter through hole into which the pressing spring 74 can be inserted. ing. In addition, the lock piece holder 71
On the lower side, a return spring 76 made of a coil spring,
A holding shaft 77 for holding the return spring 76 is provided. The return spring 76 abuts against the inner wall 78a (FIG. 2) of the holding portion 78 below the lock piece 48 in FIG. 8A, and is urged in a direction to separate the lock piece holder 71 from the inner wall. . A cam follower 79 having a screw portion 80 and having a rotatable outer ring is attached to the base of the lock piece holder 71.

The lock piece holder 71 is mounted on the frame 31.
The lock block 46 provided on the carrier unit 36 is provided so as to slide within a required range in a direction perpendicular to the operation direction of the lock can 47.
When the cam follower 79 is pressed by the tapered portion 81, the lock piece holder 71 slides in the direction of the lock can 47. That is, when the carrier unit 36 is in the normal or inverted position, the lock piece holder 71 is
When the lock piece 48a or 48b is pushed in the 7 directions, the lock rods 47a and 47 constituting the lock can 47 also shown in FIG.
b into one of the locking grooves 59a, 59b,
The lock can 47 is to be locked.

The above-described lock mechanism of the present invention can be used even if the lock pieces 48a or 48b operate in a state where the lock pieces 48a and 48b do not match the lock grooves 59a and 59b. Since the pressing spring 74 contracts to absorb the stroke of the lock piece 48a or 48b, no excessive force is applied to the point mechanism.
It will not be a forced lock and will not damage the conversion mechanism. Further, since the two locking grooves 59a or 59b of the locking canister 47 with which the lock pieces 48a or 48b are engaged have different heights, the height of the two lock piece holders 71 and the mounting of each lock piece 48a, 48b. The positions also differ in height accordingly.

The two lock detectors 49a and 49b shown in FIG. 8 (a) use a limit switch, and are provided with a rotary shaft connected to a plunger of a micro switch in a main body 82 thereof. The roller 84 provided at the tip of the fixed lever 83 is used for the lock piece 48a or 4
When the push-up at the rear end of the lock piece 8b is released, the micro switch, that is, the lock detector 49a or 49b is in an inactive state and detects the locked state, and the lock switch 48a or 48b The micro switch, ie, the lock detector 49a or 49b, is in the operating state when the switch is in the up-converted state, and detects that it is in the up-converted state.

The position where the lock detector 49b is attached is as follows.
Lock detector 49a according to the height of lock piece 48b
Higher. In addition, the lock stick 47 of the lock can 47
As shown in FIGS. 1 and 9, detection metal fittings 51a and 51b are respectively provided on the side surfaces of a and 47b, and two linear sensors 50a and 50b are fixed in two steps to a frame 86 attached to the side surface of the frame 31. Have been. As described above, when the lock groove 59a or 59b of the lock can 47 faces the position of the lock piece 48a or 48b as described above,
The detection fitting 51a or 51b is a linear sensor 50a or 5
The linear sensor 50a or 50b detects the stroke amount controlled by hitting the operating rod 0b, and measures the amount of lock failure with the lock piece 48a or 48b in an analog manner. The alarm is sent to a signal place when the amount of lock deviation exceeds the threshold value in this measurement, and the lock 47 and the lock mechanism are adjusted before a problem occurs to prevent the occurrence of an accident. It is.

Next, the operation can 3 in the switch of the present invention.
The switching operation from the localization of the lock lever 8 and the locking canister 47 through the switching operation to the opposite position and the locked state will be described with reference to FIGS. 10 to 12 show the operation can 38 and the lock can 4.
7 and the like, and FIGS.
7 illustrates the locked state. FIGS. 10 (a) and 13 (a) show a localized or inverted state. If this state is assumed to be localized, the carrier unit 36 is at the right start position, and the drive shaft 41 It is located at the end of the locking portion 68a of the guide hole 43 and at the end of the operation hole 62 of the operation can 38,
As shown in FIG. 6, the operation can 38 is locked and locked.

At this time, the lock block 46 fixed to the carrier unit 36 includes a lock piece assembly 70a.
Is pushed up, the lock piece assembly 70a is moved to the lock can 47 side against the pressure of the return spring 76, and the lock piece 48a is moved to the lock can 4 in the fixed position.
7 is fitted into the lower locking groove 59a to be in a locked state. When the lock piece 48a is fitted into the lock groove 59a, the lever 83 of the lock detector 49a is moved to the lock piece 4a.
The push-up at the rear end of 8a is released, and it is detected that the micro switch is in the locked state on the localization side due to the inoperative state.

Next, as shown in FIGS. 10 (b) and 13 (b), when the servo motor 32 rotates and the carrier unit 36 moves, the drive shaft 41
As a result, the guide plate 42 is pulled out from the lock portion 68a of the guide hole 43 of the guide plate 42, and the operation can 38
To the central portion of the operating hole 62 and shifts from the locked state to the released state. At the same time, lock piece assembly 70a
Is lifted by the lock block 46, and the lock piece 48a is locked by the action of the return spring 76.
And the lock of the lock can 47 is released. When the lock piece 48a returns, the roller 84 of the lock detector 49a is pushed up at the rear end, and the micro switch is operated to detect that the lock state has shifted to the unlock state.

Next, as shown in FIGS. 11A and 13C, when the servo motor 32 further rotates and the carrier unit 36 moves, the drive shaft 41
3 moves from the curved portion to the straight portion, and then moves to the right in the straight portion. With the movement of the drive shaft 41, the operating rod 38 moves rightward. The moving speed of the operation can 38 gradually increases from a low speed until the drive shaft 41 passes through the curved portion of the guide hole 43, and becomes the same as the operation speed of the carrier unit 36 in a linear portion. When the tongue rail 39 is operated in a predetermined direction by the movement of the operation can 38, the lock can 47 connected to the tongue rail 39 also moves in the same direction in synchronization with the movement of the operation can 38.

The state shown in this drawing is a state in which the operation can 38 is located substantially at the center of the conversion operation. Therefore, in this state, the lock block 46 is also mounted on both lock piece assemblies 70.
a, 70b, the lock pieces 48a,
48b is in a fixed position by the action of the return spring 76. Therefore, both lock detectors 49a and 49b are operating and detect that they are unlocked.

Next, as shown in FIGS. 11 (b) and 14 (a), the servo motor 32 is further rotated to move the carrier unit 36, and the drive shaft 41 is connected to the guide hole 43 through the drive link 40. Immediately before the lock enters the bending portion, the movement of the operation can 38 stops, and the movement of the lock can 47 connected to the tongue rail 39 also stops. At this time, the lock piece 48b is at a position where it can be fitted into the lock groove 59b on the upper side of the lock can 47, and the lock block 46 fixed to the carrier unit 36.
Is located just before pushing up the cam follower 79 of the lock piece assembly 70b. Therefore, since the lock piece 48b does not operate until this state, the lock detectors 49a and 49b are still in the same operation state as described above.
It detects that it is unlocked. The moving speed of the operation rod 38 after the drive shaft 41 enters the curved portion of the guide hole 43 stops from the above-mentioned constant speed through a low-speed state.

Next, as shown in FIGS. 12 and 14 (b), when the servo motor 32 further rotates and the carrier unit 36 moves, the drive shaft 41
As a result, the end of the locking portion 68b of the guide hole 43 and the end of the operation hole 62 of the operation can 38 are pulled, and the operation can 38 is locked as shown in FIG. At the same time, the lock block 46 fixed to the carrier unit 36 pushes up the cam follower 79 of the lock piece assembly 70b,
The lock piece assembly 70b is moved to the lock can 47 side against the pressure of the return spring 76, and the lock piece 48b is fitted into the lock groove 59b on the upper side of the lock can 47 at the opposite position to lock the lock can. To

By the operation of the lock piece 48b, the lever 83 for operating the micro switch of the lock detector 49b is restored, and the lock detector 49b shifts from the unlocked state to the locked state on the opposite side. Detect that Although the above-described operation has been described for the case where the orientation is changed from the localization to the inversion, the same operation is also performed when the orientation is changed to the localization.

The output (ball screw output) of the operation can 38 from the above-described localization position to the inversion position through the conversion operation is, as shown in the characteristic diagram showing the mechanism efficiency in FIG. It is constant when the straight portion of the hole 43 is actuated, but is locked from the straight portion to the locking portion 68 through the curved portion.
, The output rapidly increases, and immediately before the operation is stopped, the output increases up to about 3 to 7 times the linear portion. Therefore, the present invention is suitable for an indirect locking type pointing machine in which the tongue rail 39 is brought into close contact with the track rail with three to five times the force at the time of conversion.

Next, the circuit operation will be described with reference to the system configuration diagram shown in FIG. When the control signal is inverted, the control relay 5
4 is switched, and at this time, the control relay 54 and the lock detector 4
The turning position command by the circuit constituted by 9a or 49b enters the servo driver of the control box 33. Accordingly, the servo driver (33) rotates the servomotor 32 in the direction of the change position command, and starts changing points. As described above, this change is made by first detecting the unlocking of the lock can 47 by the lock detector 49a or 49b, and thereafter, the operation can 3
8 starts operating. After the point is changed and the operation can 38 is stopped, the lock detector 49b or 49a on the opposite side detects the lock on the opposite side of the lock can 47 and reconfigures the circuit. As a result, the turning position command input to the servo driver (33) is eliminated, and the servo driver (33) stops the servo motor 32, and at the same time, the point position is displayed.

When a foreign object or the like is caught between the track rail and the tongue rail and cannot be converted, the servo driver (33) detects an overload of the servo motor 32 and stops the servo motor 32. After the conversion, the locking grooves 59a, 5
9b and the lock pieces 48a, 48b are displaced from each other so that the lock pieces 48a, 48b are locked with the lock grooves 59a, 59b.
If not, the carrier unit 36 hits the stopper, and the servomotor 32 is overloaded and stopped. At this time, no lock is detected. When this series of operations is shown in chronological order, it can be represented as a time chart in FIG. FIG. 16 shows a case where the orientation is changed from the localization (left side) to the opposite side (right side).

That is, when the switch is in the normal position (left side),
The control signal, the control relay 54, and the display circuit including the control relay 54 and the lock detector 49 are in a localized state. The left lock piece 48a enters the lock groove 59a of the lock can 47 and locks it, and the left lock detector 49a detects the locked state on the stereotactic side. When the control signal switches from the localization to the inversion, the control relay 54 switches to the inversion side, whereby the display circuit composed of the control relay 54 and the lock detector 49 is short-circuited, and the display signal disappears. Next, the servo motor 32 rotates according to the rotational position command of the servo driver (33), and the conversion starts. As a result, the left lock piece 48a starts operating and the left lock detector 49
a detects unlocking and stops after completely exiting from the lock groove 59a of the lock can 47.

When the operation can 38 moves to the right and the right lock piece 48b enters the lock groove 59b of the lock can 47, the right lock detector 49b detects the lock on the opposite side. At this time, the display circuit forms an inverted signal circuit. Therefore, the rotational position command of the servo driver is lost, the servo motor stops, and the operation of the right lock piece 48b also stops. When performing a manual operation, the control command is inverted by the push button switch 53, and the point is changed to the opposite side. In addition, at the time of a power failure or an abnormal state of the system, the turning can be performed by manually turning the handle 85 to the handle shaft 57 and manually rotating the handle. At this time, the power supply circuit of the servo motor 32 is shut off by the manually operated safety device 58.

Since the AC servo motor 32 driven by the servo driver of the control box 33 is rotated by sequentially switching the current flowing through each phase winding, the servo driver (33) breaks down. When the output remains in the ON state, the rotation of the AC servomotor 32 stops, and it does not start to rotate freely. False recognition of the turning position command input to the servo driver (33) is prevented by double loading.

[0042]

As described above in detail, the turning machine according to the present invention uses an AC servomotor to provide a rotation ratio of a rotation transmitting mechanism to a ball screw of 1: 1. There is no need for a speed reduction mechanism for motor rotation, the structure is extremely simplified, and a significant reduction in weight can be achieved by eliminating the need for a reduction mechanism that occupies a considerable weight. The use of the servo motor also has the following effects. Able to detect an overload and automatically stop when switching is impossible due to obstacles, etc. The load on the mechanism can be reduced by gradually changing the speed during driving and stopping. By enriching the external devices, the following non-convertible preventive diagnosis function can be provided. -The conversion force can be monitored from the output torque of the servo motor.・ The amount of lock failure can be monitored by computerization with servo and adopting a linear sensor for the lock failure detector. Furthermore, by using a non-compulsory lock for the locking method of the lock can, it is possible to protect the mechanism when locking is not possible.

[Brief description of the drawings]

FIG. 1 is a top view and a front view showing an embodiment of a point machine according to the present invention.

FIG. 2 is a side view showing one embodiment of the points of the present invention;
The two states of the closed state and the opened state are shown together.

FIG. 3 is a system configuration diagram of an embodiment of the switch according to the present invention.

FIG. 4 is an assembled perspective view and an exploded perspective view showing one embodiment of a driving mechanism portion of the operation can according to the present invention.

FIG. 5 is a perspective view showing one embodiment of a drive shaft according to the present invention.

FIG. 6 is a longitudinal sectional view showing an embodiment in which the drive shaft according to the present invention is mounted on an operation can or the like.

FIG. 7 is a schematic view of one embodiment of a guide hole of a guide plate according to the present invention.

FIG. 8 is a perspective view showing an embodiment of a lock mechanism of the lock can according to the present invention.

FIG. 9 is a perspective view showing an embodiment of a lock deviation amount detecting mechanism during the locking operation of the lock can according to the present invention.

FIG. 10 is a top view for explaining the operation of the operation can and the lock can according to the present invention.

FIG. 11 is a top view for explaining the operation of the operation can and the lock can according to the present invention.

FIG. 12 is a top view for explaining the operation of the operation can and the lock can according to the present invention.

FIG. 13 is a perspective view illustrating the operation of the lock can according to the present invention.

FIG. 14 is a perspective view illustrating the operation of the lock can according to the present invention.

FIG. 15 is a characteristic diagram showing a mechanism efficiency of the operation can according to the present invention.

FIG. 16 is a time chart showing the operation of the switch according to the present invention in chronological order.

FIG. 17 is a top view showing an example of a conventional point machine.

FIG. 18 is a perspective view showing a driving mechanism of an operation can and a lock can of a conventional point machine.

FIG. 19 is a perspective view for explaining an operation relationship between an operation can of a conventional point machine and a cam bar and the like.

FIG. 20 is a perspective view and a top view for explaining the operational relationship between the operation can and the lock can of the conventional point machine.

21A and 21B are a perspective view and a top view for explaining the operational relationship between an operation can of a conventional point machine and a lock can.

FIG. 22 is a perspective view and a top view for explaining the operational relationship between the operation can of a conventional point machine and a lock can.

FIG. 23 is a perspective view and a top view for explaining the operational relationship between the operation can and the lock can of a conventional point machine.

24A and 24B are a perspective view and a top view for explaining an operation relationship between an operation can and a lock can of a conventional point machine.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 motor 2 bevel gear 3 intermediate gear 4 conversion gear 5 conversion roller 6 operating rod 7 locking rod 8 gap between locking rods 9 cam bar 10 lock piece 11 control circuit 12 control relay 13 conversion display plate 14 push button switch 15 external terminal Plate 16 Conversion cam surface of operation can 17 Escape cam surface of operation can 18 Step portion of operation can 19 Lock portion of lock piece 20 Lock groove of lock can 21 Conversion cam surface of cam bar 22 Escape cam surface of cam bar 23 Lock piece Rear end outside 31 Frame 32 AC servomotor 33 Control box (servo driver) 34 Ball screw 35 Coupling 36 Carrier unit 37 Guide shaft 38 Operating rod 39 Tong rail 40 Drive link 41 Drive shaft 42 Guide plate 43 Guide hole 44 Link Shaft 45 Spacer shaft 46 Lock block 47 Lock canister 48 Lock piece 49 Lock detector (switch) 50 Linear sensor 51 Detecting bracket 52 Lid 53 Push button switch 54 Control relay 55 Connector 56 Terminal block 57 Manual handle handle shaft 58 Manual safety device 59 Lock Groove of Lock Can 60 Lock Gaps between Lock Bars 61 Swelling of the central part of operating can 62 Operating hole of operating can 63 Large shaft part of drive shaft 64 Engagement part of drive shaft 65 Engagement part of drive shaft Part 66 Column part of drive shaft 67 Roller follower of drive shaft 68 Lock part of guide hole 69 Inner narrow part of guide hole 70 Lock piece assembly 71 Lock piece holder 72 Male screw part 73 Shaft 74 Push spring 75 Shaft insertion hole 76 Return Spring 77 Holding shaft 78 Holder for lock 79 Cam follower for lock piece assembly 80 Screw for cam follower 81 Taper of lock block 82 Main body of lock detector 83 Lever of lock detector 84 Roller for lock detector 85 Handle 86 Linear sensor mounting Frame

Claims (5)

[Claims] 1. A turning machine for operating a tongue rail on a track rail in a fixed or inverted position, comprising: a servomotor 32; a ball screw 34 connected to the servomotor; and a ball screw screwed into the ball screw. A carrier unit 36 which performs a moving operation by rotation of the above; a guide means 37 provided in parallel with the ball screw with respect to the carrier unit so that the moving operation of the carrier unit can be performed horizontally; Operation can 38 whose one end is connected to a tongue rail 39 having a vertically elongated operation hole 62 in the direction of rotation.
And a crank-shaped guide hole 4 having a long intermediate straight portion.
3, two guide plates 42 fixed to the frame 31 so as to slidably hold the operation can, a guide hole 43 of the two guide plates, and an operation hole of the operation can 38 A drive shaft 41 which is fitted into the guide plate 62 and moves along the guide hole of the guide plate to operate the operation can 38; and a drive shaft 41 provided to transmit the movement operation of the carrier unit 36 to the drive shaft 41. A locking link 47 having two locking grooves 59a and 59b provided at a required interval in the operating direction and connected to the tongue rail 39; Is operated based on the operation of the tongue rail 39, and when the operation can 38 is operated at the normal position or the inverted position, one of the lock cans 47 is operated. And two lock pieces 48a and 48b movably provided in the direction of the locking groove, respectively, and the carrier unit 36 positions the operation can 38 in a fixed or inverted position. The lock unit 48 is provided on the carrier unit 36 to move the lock pieces 48a, 48b into the corresponding lock grooves of the two lock grooves 59a, 59b of the lock can 47 when the lock unit 47 is operated. And a locking block 46. 2. The operating rod 3 of the drive shaft 41.
8 is formed in a planar shape in contact with an operation hole 62, and a guide hole 43 of the guide plate 42 is formed.
A roller follower 67 is fitted into a portion in contact with the inside, and the inner narrow portion 69 of the locking portion 68 at both ends of the guide hole 43 is provided.
2. The turning machine according to claim 1, wherein a portion in contact with is formed in a planar shape. 3. The lock pieces 48a and 48b are mounted on a moving lock piece holder 71 by a shaft 73 and a pressing spring 74, and the lock piece holder 71 is moved and returned by a return spring 76 and a holding shaft 77. The turning machine according to claim 1 or 2, which is provided as follows. 4. Switches 49a, 49 which are turned on / off in accordance with the operation of the lock pieces 48a, 48b.
4. The switch according to claim 1, wherein the switch comprises a b and detects an operation state of the lock can 47. 5. 5. A lock 2 provided on a side surface of the lock can 47.
The two detection fittings 51a, 51b, and the frame so that their detection axes abut against the respective detection fittings 51a, 51b before the lock can 47 is operated to stop at the fixed or inverted locking position. 31 provided with two linear sensors 50a and 50b, and stopping the lock can 47 based on the stroke value of the detection axis of each linear sensor at the fixed or inverted lock position of the lock can 47. The point machine according to claim 1, 2, 3, or 4, wherein the position is measured and the amount of lock deviation is detected.