JPH0537733Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field to which the invention pertains This invention relates to an electric point machine, and more specifically, improves the method of using the prime mover, the transmission mechanism, and the locking mechanism.

Prior Art and Its Disadvantages Most of the conventional electric point machines use a motor as the prime mover, as illustrated in FIG.
The reduction gear 4 is meshed with the gear 3 provided in the
A pin 5 provided at an eccentric position of the gear is fitted into a V-shaped groove 7 of an operating bar 6. The rotation of the motor 1 in one direction or the other causes the pin 5 to move along one side of the groove 7, thereby moving the actuation bar linearly to the left or right in FIG. 4, and at the end of the stroke, i.e. When the conversion is completed, the pin 5 is brought into contact with an escape surface 8 formed by a part of the inner surface of the groove 7, thereby locking the groove.

This conventional technique converts the rotational motion of the prime mover into linear motion of the actuating bar, but since it uses gear type reduction mechanisms 3 and 4, it is bulky, has a small reduction ratio, and has large inertia. Another disadvantage is that the escape surface of the actuating bar 6 is not easy to manufacture.

FIG. 5 shows an example of a conventional device that uses a linear reciprocating drive means such as a cylinder and piston as a prime mover, in which a piston rod 11 is connected to one end of a lever 10 that is swingably supported by a fulcrum 9 in the center, and the other end is A pin 14 provided on the actuating bar 13 is fitted into the V-shaped groove 12 on the side, and the piston rod 1
The linear motion of the lever 10 is converted into a rotational motion of the lever 10 to move the pin 14 along one side of the groove 12, and at the end of the stroke corresponding to the end of the conversion, the pin 14 is moved along one side of the groove 12.
4 is locked by abutting against an escape surface 15 formed by a part of the inner surface of the groove 12.

This prior art converts the linear motion of the prime mover into the linear motion of the actuating bar, but since it uses the swinging lever 10, it requires a swinging area for the piston rod 11, which poses problems in terms of installation. There is also a problem with the reliability of locking.

Purpose of this invention In view of the above points, this invention aims to miniaturize the device, reduce inertia, and improve locking reliability by improving the method of using the prime mover, the transmission mechanism, and the locking mechanism. It is ivy.

Embodiments of this invention Next, embodiments of this invention are shown in Figures 1 to 3.
This will be explained based on the diagram.

The conversion device according to this invention can use either a rotary drive means such as a motor or a reciprocating drive means such as a cylinder/piston as the prime mover. Therefore, when referring to an electric switch machine in this invention, it also includes an electropneumatic switch machine.

The embodiment shown in FIGS. 1 and 2 is an example in which a motor is used.

Reference numeral 21 denotes a fixed base fixed to the ground, and a bottom plate and a guide plate 22 move the operating bar 23 to the center of stroke c.
In the drawing, it is held so as to be able to reciprocate in a predetermined distance in the left and right direction. A tongue rail is connected to one end or the other end of the actuating bar 23 via a tie bar (not shown), and movement of the actuating bar in one direction changes the tongue rail to the normal position, and movement of the actuating bar in the other direction changes the tongue rail to the reverse position. It is something.

The actuating bar 23 is provided with notches 24 and 25 that open in a direction substantially perpendicular to the longitudinal direction of the actuating bar at symmetrical positions with respect to the stroke center c. A letter-shaped crank 26 is swingably attached at its center by a pin 27.

The crank 26 has lock pins 2 at both ends that can fit into the notches 24 and 25 by swinging the crank.
It has 8,29. Then, an escape surface 3 is provided on the surface opposite to the bottom of the notches 24 and 25 of each lock pin.
It has 0.31.

On the side of the fixed base 21 opposite to the guide plate 22 with respect to the operating bar 23, there is a first guide surface 32 that extends parallel to the operating bar in the middle of the stroke of the operating bar.
However, second guide surfaces 33 and 34 are also formed at both ends of the stroke, which are connected to the first guide surface and are inclined with respect to the moving direction of the actuating bar. When the operating bar is in the middle of its stroke, both the crank lock pins 28 and 29 are connected to the first guide surface 32.
is in contact with and guided by, preventing the crank from swinging,
In addition, it is held in a state where it is retracted outward from the notches 24 and 25. On the other hand, when the actuating bar moves to either end of its stroke, one of the locking pins 28
or 29 correspond to the second guide surface 33 or 34, respectively, so that the crank can swing and fit into the notch 24 or 25.

A movable table 35 is attached to the fixed table 21 on the same side as the first guide surface 32 with respect to the actuating bar 23 so as to be able to reciprocate in parallel to the moving direction of the actuating bar 23. This moving platform is linearly reciprocated by a prime mover operated by a switching command given from a control room equipped with a relay interlocking device.

In the first embodiment in which a motor is used as the prime mover, a motor 36 is fixed to a fixed base 21, and a gear 37 fixed to its rotating shaft is attached to a bearing 38 on the fixed base 21.
The movable base is engaged with a gear 41 fixed to one end of a threaded rod 40 rotatably supported by a screw 39, and connected to a nut 42 screwed onto the threaded rod.

A pair of rollers 4 are mounted on the movable table 35 at symmetrical positions with respect to the stroke center c of the actuating bar 23.
3 and 44 are provided between the lock pins 28 and 29 of the crank 26 when the actuating bar is in the center of its stroke, and on substantially the same plane as the movement plane of the lock pins.

With the above configuration, when the motor 36 is rotated in one direction in the state shown in FIG. Move in a straight line. Now, if the moving table moves to the left in the drawing, the roller 43 pushes the lock pin 28 of the crank 26. Since this lock pin is now in contact with the first guide surface 32 of the fixed base and on the roller moving surface, the roller 43 engages with the lock pin 28, so the actuating bar 23 is moved to the left by the crank 26. Ru. That is, the linear motion of the moving table 35 is converted into the linear motion of the actuating bar 23 via the secondary transmission mechanism, ie, a roller and a lock pin of the crank.

When the operating bar reaches the left stroke end, as shown in FIG. 2, the lock pin 28 moves from the first guide surface 32 of the fixed base to the second guide surface 33, and the crank 26 becomes swingable. , the roller 43 rides on the lock pin 28 and the lock pin is cut out 24.
It is fitted into the inside and comes into contact with the escape surface 30 of the crank. Further, when the stroke end is reached, the rotation of the motor 36 is stopped by an output signal from an end detector (not shown). Therefore, since the crank 26 is fixed by the roller 43 so that it cannot swing, the operating bar is locked in the state shown in FIG. 2 by the engagement of the lock pin 28 with the second guide surface.

When the motor 36 is reversely rotated by a reverse direction change command input from the control room, the movable table 35 is moved to the right in FIG. 2 via the primary transmission mechanisms 37, 41, 40, and 42. As the roller 43 moves away from the escape surface 30 and releases the lock pin 28, the other roller 44 engages with the other lock pin 29 of the clamp 26, so that the crank is swung, and the lock pin 28 exits the notch 24 and simultaneously opens the lock pin 28. 2 Move away from the guide surface. Accordingly, the operating bar 23 is unlocked, moves to the right in FIG. 2, and returns to the state shown in FIG. 1.

The moving table 35 further moves to the right, and when it reaches the right end of its stroke, the action of the rollers 44 and the lock pin 29 causes the crank to oscillate in the same way as described above for the case where the operating bar 23 reaches the left end of its stroke. As the lock pin 29 moves, the lock pin 29 comes into contact with the second guide surface 34, and the roller 44 comes into contact with the escape surface 31 of the lock pin 29, thereby being locked.

In the above embodiment, since the power of the motor 36 is transmitted to the movable table 35 via the threaded rod 40 and the nut 42, the reduction ratio is large and the inertia is significantly reduced. Furthermore, by using a threaded rod and a nut, there is no need for a reduction gear with a large diameter, so it is possible to downsize the entire conversion device.

In order to move the moving table 35 in a straight line, instead of using the above motor, as illustrated in FIG.
It is also possible to employ a structure in which the cylinder/piston 45 is used and the movable table 35 is linearly connected to the piston rod 46.

In the case of this embodiment, the gears 37, 41, threaded rod 40, and nut 42, which are the primary transmission mechanisms in the previous embodiment, are not necessary, so that the device can be further miniaturized. Further, in this embodiment as well, inertia can be reduced.

Effects of this invention As described above, according to this invention, the swinging of the crank attached to the operating bar is prevented and allowed by the first and second guide surfaces provided on the fixed base, and The crank is engaged and moved along the first guide surface by a roller provided on the crank, and is swung on the second guide surface to bring the lock pin provided on the crank into contact with the second guide surface. The lock pin is inserted into the cutout and locked by fixing the lock pin with a roller.
It is possible to convert the linear motion of the moving platform into linear motion of the actuating bar using a simple transmission mechanism. Therefore, the moving platform can be connected to a rotary drive means such as a motor and a transmission means such as a threaded rod and a nut screwed thereto. Alternatively, it becomes possible to use reciprocating drive means such as a cylinder and piston, achieving high deceleration and low inertia.

Further, since the locking mechanism is constituted by the roller, the crank having the lock pin, and the first and second guide surfaces, the reliability of locking is improved.

[Brief explanation of the drawing]

Figures 1 and 2 show a first embodiment of this invention; Figure 1 is a plan view when the actuating bar is in an intermediate position, and Figure 2 is a plan view of the actuating bar at one end of its stroke due to conversion. FIG. FIG. 3 is a plan view showing the second embodiment. FIGS. 4 and 5 are plan views showing the main parts of the conventional device. 21... Fixed base, 23... Operating bar, 24,2
5... Notch, 26... Crank, 28, 29...
Lock pin, 30, 31... Escape surface, 32
...First guide surface, 33, 34...Second guide surface, 3
5...Moving table, 36...Motor, 40...Threaded rod, 42...Nut, 43, 44...Roller, 4
5...Cylinder/piston, 46...Piston rod.

Claims (1)

[Claims for Utility Model Registration] Fixed base 21, operating bar 23, and movable base 35
and a prime mover 36, the fixed base 21 has a horizontal first guide surface 32 and a first
The actuating bar 23 has two inclined second guide surfaces 33 and 34 on both sides of the guide surface 32, and is installed on the ground where the fixed rail is laid. one end in the moving direction is connected to a tongue rail and is slidably provided on the fixed base 21, and the two notches 24 and 25 are provided at a predetermined interval in the moving direction of the actuating bar 23. The crank 26 is rotatably provided at the midpoint of a surface different from the surface where the two notches 24 and 25 are provided, and has lock pins 28 and 29 at both ends, respectively. 28, 29 are one notch 24 or 25 and one second guide surface 33 or 3.
4, it comes off the other notch 25 or 24 and the first guide surface 32, and when it is kept horizontally, it contacts the first guide surface 32 at the same time. two notches 2
4, 25, and has two rollers 43, 44 having a spacing slightly smaller than the spacing between the two lock pins 28, 29.
The motor 36 is provided on the fixed base 21 to move the movable base 35 parallel to the moving direction of the operating bar 23 on the movable base 21 . Switch machine.