JPH0332504B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field> The present invention relates to an indexing electric switch having an unauthorized unlocking prevention mechanism that can reliably prevent unlocking due to unauthorized external force from the rail side.

<Background technology> An indexing electric switch is capable of moving the wheels of a vehicle without damaging the switch mechanism when a vehicle approaches from the opposite side of a turnout where the point is not open. The force applied from the flange automatically causes the tongue rail to change direction (indexing operation) so that the vehicle can safely pass through the point. Conventional examples of such indexing electric point machines include, for example, those using a gellench and those with an indexing mechanism built into the switch body, and these are shown in FIGS. 1 and 2, and their indexing Briefly explain the operation.

First, Figure 1 shows an example of using a gellenk, in which the vehicle is running on the back side of the point where it is not open, that is, on the basic rail 1B and the opening side tongue rail 2A of the basic rails 1A, 1B and tongue rails 2A, 2B. As the vehicle advances, the opening side tongue rail 2A is pushed toward the base rail 1A by the flange portion of the wheel.
As a result, each tongue rail 2A, 2B
A substantially Y-shaped gel lens 4 connected to the tip via links 3A and 3B rotates counterclockwise in the figure around a fulcrum A. Accompanying this rotation of the gear lever 4, the tongue rails 2A, 2B move to perform indexing. In the normal electric conversion operation, force is applied from an operating rod (not shown) to the opening side tongue rail 2A via the tie bar 5 and the connecting plate 6 to rotate the gear lever 4.

On the other hand, in the case of a point machine with an indexing mechanism built into the main body as shown in Fig. 2, two operating rods 11 and 12 are provided and connected to the tongue rails 2A and 2B, respectively, and the opening side tongue rail 2A is connected to the wheel. When pushed toward the basic rail 1A by the flange portion, one of the operating rods 11 connected to the tongue rail 2A moves in the same direction. This movement of the operating rod 11 causes the conversion gear 14 and cam 15 to rotate via the conversion roller 13, and the other operating rod 12, which engages with the conversion roller 13 together with the operating rod 11, also moves in the same direction as the operating rod 11. do. Since the operating rod 12 is connected to the close-contact side tongue rail 2B, the close-contact side tongue rail 2B moves in a direction away from the base rail 1B, thereby converting or indexing the tongue rails 2A and 2B.

In conventional switch machines having the above-mentioned indexing mechanism, the toggle spring 7 in the one shown in FIG. In the one shown in FIG. 2, a compression spring 16 is provided between the two operating rods 11 and 12 to provide resistance to the movement of the operating rods 11 and 12. ing. In the latter case, one operating rod 11 connected to the opening side tongue rail 2A
Even if the moving rod 12 moves, the other operating rod 12 will not be connected to the conversion gear 14.
Until the conversion roller 13 comes out of the escape cam surface 12A area of the operating rod 12, which is formed concentrically with It is beginning to give.

However, in the conventional unauthorized unlocking prevention mechanism, the spring force of the toggle spring or compression spring is stronger than the force caused by the vibration of a passing vehicle, preventing unauthorized unlocking, but if a person intentionally uses a lever etc. When you try to move the rail, it easily unlocks.

To prevent this, it is possible to strengthen the spring force of the toggle spring or compression spring, but in the conventional structure, the spring force acts even during normal electric conversion operation, which may lead to an increase in the load on the motor. This results in an increase in motor power and power consumption, which is economically disadvantageous.

<Object of the invention> The present invention has been made in view of the above circumstances, and
By adopting a structure in which a strong spring force acts only during the indexing operation, the lock will not unlock due to vibrations from passing vehicles or unauthorized external forces caused by human mischief, and moreover, the motor load will be reduced during normal electric conversion operation. It is an object of the present invention to provide an indexing electric switch having a mechanism for preventing unauthorized unlocking without increasing the number of locks.

<Summary of the Invention> For this reason, the first invention includes an electric conversion mechanism that converts the tongue rail via an operating rod using power from a motor, as well as an electric conversion mechanism that converts the tongue rail by an external force from the opening side tongue rail that is separated from the basic rail. In an indexing electric point machine having an indexing mechanism in which an operating rod slides to change a tongue rail, a sliding member provided so as to be slidable in the same direction as the sliding direction of the operating rod, and the sliding member and the operating rod are provided. an elastic member arranged to be extendable and retractable in the sliding direction of both; a locking means for locking the sliding member in a non-slidable state when the conversion of the tongue rail is completed; The locking device is configured to include a first unlocking device for unlocking the locking device, and a second unlocking device for unlocking the locking device before the movement rod starts sliding during the electric conversion operation.

Further, in a second invention, in addition to the configuration of the first invention, a notch opening of the operating rod with which a conversion roller of an electric conversion mechanism rotated by power from a motor engages during electric conversion, A tapered surface that widens toward the opening direction is provided.

<Example> Examples of the present invention will be described below.

FIG. 3 to FIG. 9 show the structure of an embodiment in which a gel lens is used.

In the figure, 21A and 21B are basic rails, 2
2A and 22B are tongue rails, and 23 is a rhombus-shaped gel rod, which is rotatably supported on a support shaft 24 and linked to the respective tongue rails 22A and 22B via links 25A and 25B, as well as through a rod 26. It is connected to an operating rod 38 of the switch main body 30, which will be described later. Said tongue rail 22
At the link joint portions A and 22B, one end is connected to lock rods 42 and 43, which will be described later, of the switch main body 30, and the other end of the rod 27 and 28 is connected to links 25A and 25B.
They are also connected by pins 25C and 25D.

Next, the configuration of the main body of the point machine is shown in FIGS. 4 and 5.

The power from the motor 31 is transmitted to a pair of bevel gears 32.
It is transmitted from the friction clutch 33 to the pinion 34 to rotate the conversion gear 35 that meshes with the pinion 34. 39 is a hand-cranked handle for manual use. Said conversion gear 3
5, a cam 36 having a predetermined cam surface 36A on its upper surface is provided integrally with the conversion gear 35, and a conversion roller 37 is provided on its lower surface. The conversion roller 37 is connected to the conversion gear 35 during normal electric conversion operation.
It is provided at a position that engages with a notch 38A formed in the above-mentioned operating rod 38 disposed on the lower surface side.
An escape cam surface 38a formed concentrically with the conversion gear 35 is provided in the notch 38A. Further, a tapered surface 38c is formed on the opening side of the escape cam surface 38a to widen in a tapered shape. 40 and 41 are an operating rod 38 and a locking rod 42,
With the lock piece that locks the spring 4
4 and 45, the operating rod 38 and locking rods 42 and 43
is constantly biased in the locking direction (downward in the figure). Each lock piece 40, 41 has a first roller 40A, 41 that contacts the cam surface 36A of the cam 36.
A, and second rollers 40B and 41B that come into contact with an inclined surface 38b formed on the operating rod 38 and an end surface of a holding plate 51, which will be described later, at the end of the conversion. Therefore, the second rollers 40B, 41B of the lock pieces 40, 41 serve as locking means for the retaining plate 51,
The inclined surface 38b of the operating rod serves as a first unlocking means, and the cam 36 and the first rollers 40A, 41B constitute a second unlocking means. In addition, there is a locking rod 4 in the middle part.
A locking element 47 that engages when the locking rod is locked is provided in a notched groove 46 provided in each of the locking rods 2 and 43, and the locking element 47 is cut out when the lock pieces 40 and 41 are pushed upward in FIG. The locking rods 42 and 43 are unlocked by coming out of the groove 46.

Reference numeral 50 designates a compression spring as an elastic member that resists the movement of the operating rod 38 during indexing operation and has a stronger spring force than the conventional one to prevent unauthorized unlocking. It is held by a holding plate 51 as a sliding member that can freely slide.

Details of this compression spring holding structure are shown in FIGS. 6 to 9. That is, the operating rod 38 has a square hole 38d and a square groove 3 for housing the compression spring 50.
8e and the guide 5 for sliding the retaining plate 51.
2 will be provided. In addition, there is an operating rod 38 on the holding plate 51 side.
A square hole 51a and a square groove 51b of the same shape are formed. Then, the holding plate 51 is fitted between the guides 52 of the operating rod 38, and the compression spring 50 is held in the square holes 38d and 51a via the pair of spring receivers 53 and 54. The pair of spring receivers 53, 5
4 has medium-square support parts 53A and 54A supported in a square groove part 55 formed by the square groove 38e of the operating rod 38 and the square groove 51b of the holding plate 51, and the support parts 53A and 54A are different from each other. On the opposite facing side, one spring receiver 54 is formed with a tubular portion 54B, and the other spring receiver 53 is formed with a rod-shaped portion 53B that can fit into the inner diameter of the tubular portion 54B. has been done.

Next, the action will be explained.

First, a case will be described in which the vehicle enters the turnout from the rear side (upper side in FIG. 3) and indexes the tongue rail.

In this case, the vehicle is running on the basic rail 21A and the opening side tongue rail 22B, and as the vehicle approaches the point, the tongue rail 22B is pushed toward the basic rail 21B by the wheel flange of the vehicle. As a result, the gear lever 23 rotates around the support shaft 24 in the indexing direction (counterclockwise in the figure), so the operating rod 38 connected to the gear lever 23 via the rod 26 also rotates in the indexing direction (fourth direction). slide to the right (in the figure). During the sliding operation of the operating rod 38, the holding plate 51 attached to the operating rod 38 does not move at the initial stage of sliding because its end surface is in contact with the second roller 40B of the lock piece 40 and is locked. Since the indexing force on the vehicle side is greater than the spring force of the compression spring 50,
Due to the indexing force, only the operating rod 38 slides, and the square holes 38d and 51a of the operating rod 38 and the holding plate 51 are
There is a gap between the compression spring 5 and the
0 is compressed. On the other hand, when the operating rod 38 slides, the second roller 40 is moved by its inclined surface 38b.
The lock piece 40 is pushed upward in FIG. 4 against the spring force of the spring 44 via B. Then, when the center of the rotation axis of the second roller 40B is pushed upward from the upper end position of the holding plate 51, the locking force of the second roller 40B to the holding plate 51 is released, so that the holding plate 51 is compressed. Based on the spring force of the compression spring 50, it slides together with the operating rod 38 in the indexing direction, and the indexing operation is completed.
Note that the opening side tongue rail 22B is the basic rail 21.
When the lock pieces 40 and 41 are in close contact with B and the indexing is completed, the state of the lock pieces 40 and 41 is reversed to that shown in FIG. It comes into contact with the end face of.

In addition, the lock rod 4 that was in the locked state before indexing
2 is unlocked by the movement of the lock piece 40 being pushed up in FIG. Ru.

Next, normal electric conversion operation will be explained.

The rotational force from the motor 31 is transmitted to a pair of bevel gears 3.
2. Friction clutch 33 and pinion 34
The conversion gear 35 transmitted to the conversion gear 35 via
rotates clockwise in FIG. Then, the cam 36 and the conversion roller 37 rotate together with the conversion gear 35, and while the conversion roller 37 passes the escape cam surface 38a of the operating rod 38, the cam 36 causes
The lock piece 40 is pushed upward in FIG. 4 via the first roller 40A. Lock piece 40
When the locking rod 42 is pushed upward, the locking rod 42 is unlocked and the locking force of the second roller 40B of the locking piece 40 against the retaining plate 51 is released. As a result, as the conversion gear 35 rotates, the conversion roller 37 and the notch 38A of the operating rod 38 mesh with each other, and when the operating rod 38 slides to the right in FIG. 4, the holding plate 51 also slides together with the operating rod 38. Therefore, there is no compression operation of the compression spring 50 as in the indexing operation described above, and the switching operation of the tongue rails 22A, 22B can be performed as is. Therefore, during normal electric conversion operation, the compression spring 50 is unrelated to the motor 31, and even if the spring force is set strong, the load on the motor 31 will not increase. If the spring force of the compression spring 50 does not exceed the indexing force of the vehicle,
It becomes possible to set the spring force to be much stronger than before without causing any trouble to the indexing operation.

According to the indexing electric switch having such a configuration, when an external force is applied from the opening side tongue rail side, it is necessary to compress the compression spring 50 as described above.On the other hand, during normal electric switching, the compression spring 50 must be compressed. The compression spring 50 is independent of the motor 31, and no matter how strong the spring force is set, the motor 3
This will not result in an increase in load of 1. Since the indexing force caused by the vehicle is larger than the generally assumed external force caused by human mischief, the spring force of the compression spring 50 can be set to be larger than the external force caused by the human within a range smaller than the indexing force.
To reliably prevent a switch machine from being unlocked due to unauthorized external force such as mischief, without increasing the load on the motor.

By the way, in the switch machine of this embodiment, the conversion roller 37 comes out of the notch 38A of the operating rod at the end of the electric conversion operation, so that the electric conversion mechanism from the conversion gear 35 to the motor 31 is operated during the indexing operation. The indexing load is reduced by preventing rotation. In addition, when a vehicle enters the turnout from the back side and indexes the tongue rail, if the leading vehicle does not pass the turnout and stops in the middle of the tongue rail and moves backward, the operating rod 38 is moved to the intermediate position of the switching operation. With the conventional notch shape of the operating rod, there is a risk that the conversion roller will not mesh well with the notch during the electric conversion operation.

Therefore, in this embodiment, the notch 3 of the operating rod 38
Tapered surface 38 that spreads out in the opening part of 8A
c to ensure that the switching roller 37 is surely engaged with the notch 38A no matter what position the operating rod 38 is in.

Next, a second embodiment is shown in FIGS. 10 and 11. Incidentally, the same parts as in the first embodiment are given the same reference numerals and the explanation thereof will be omitted. This embodiment shows an example of application in which two operating rods are used without using a gel rod.

That is, operating rods 38, 38' are connected to the tongue rails 22A, 22B, respectively, via rods 26, 26'. Each operating rod 38, 38' has a notch 38A, 38'A, escape cam surface 3,
8a, 38'a, inclined surfaces 38b, 38'b, tapered surfaces 38c, 38'c, square holes 38d, 38'd for supporting the compression spring 50, and square grooves for supporting the spring receiver (not shown). ) are formed in the same way as in the first embodiment. Furthermore, the operating rods 38, 38' of this embodiment are provided with vertical surfaces that come into contact with the second rollers 40B, 41B of the lock pieces 40, 41 at the initial stage of the indexing operation to restrict the sliding of the operating rods 38, 38'. 38f and 38'f are formed.

In this embodiment, the tongue rails 22A, 2
2B, one of the operating rods 38, 38' functions as the holding plate 51 of the first embodiment, and therefore the inclined surfaces 38b, 38'
b and vertical surfaces 38f and 38'f are formed at symmetrical positions, respectively.

In this configuration, in the case of indexing operation, the operating rod 38 connected to the opening side tongue rail 22B slides first. At this time, the operating rod 38' connected to the close contact side tongue rail 22A has its vertical surface 3
8'f is in contact with the second roller 40B of the lock piece 40, so it does not move, and both operating rods 38, 38'
A displacement occurs, and the compression spring 50 is compressed. When the lock piece 40 is pushed up by the slide of the operating rod 38 and the center of the rotational axis of the second roller 40B is above the upper surface position of the operating rod 38' in the figure, the restriction of the operating rod 38' by the lock piece 40 is released. , the two operating rods 38, 38' can slide together to effect the switching of the toggle rails 22A, 22B. In the operation example, operation stick 3
8' acts as the holding plate 51 of the first embodiment.

On the other hand, in the normal electric conversion operation, the rotation of the motor 31 causes the conversion roller 37 to move into the notches 38A, 3 of the operation rods 38, 38', as in the first embodiment.
8'A, escape cam surfaces 38a, 3
8'a, the control of the locking rod 42 of the operating rod 38' by the lock piece 40 has been unlocked, so as the conversion roller 37 rotates, the operating rod 3
8, 38' slide together, and the tongue rails 22A, 22B are switched without compression of the compression spring 50.

<Effects of the Invention> As described above, according to the present invention, the expansion and contraction action of the spring is required during indexing operation, but there is no expansion and contraction action of the spring during normal electric conversion operation, so the load on the motor is not increased. The spring force can be set to a large value without causing problems. Therefore, even if the resistance to illicit external force caused by mischief or the like is increased, there is no need to power up the motor, and there is no increase in power consumption, which is very economically advantageous.

Further, according to the second invention, even when the operating rod is stopped at an intermediate position of the switching operation, the conversion roller of the electric conversion mechanism can be reliably engaged with the notch of the operating rod.

[Brief explanation of drawings]

FIGS. 1 and 2 are configuration diagrams of main parts of a conventional example, and FIG. 3 is a configuration diagram showing a first embodiment of the present invention,
Fig. 4 is a configuration diagram of the main parts inside the switch main body of the same embodiment as above, Fig. 5 is a right side view of Fig. 4, Fig. 6 is an enlarged perspective view of the holding plate attachment part of the operating rod, Fig. 7 The figure is an enlarged perspective view of the holding plate, FIG. 8 is an enlarged view of the compression spring holding part, FIG. 9 is a sectional view taken along the line A-A in FIG. 8, and FIG. 10 is a second embodiment of the present invention. Main part configuration diagram shown,
FIG. 11 is a right side view of FIG. 10. 21A, 21B...Basic rail, 22A, 22
B...Tongrail, 23...Gerenku, 31...
...Motor, 35...Conversion gear, 36...Cam, 3
7... Conversion roller, 38, 38'... Operating rod, 3
8A, 38'A... Operating rod, 38b, 38'b...
Inclined surface, 38f, 38'f...Vertical surface, 40,4
1... Lock piece, 40A, 41A... First roller, 40B, 41B... Second roller, 44, 4
5... Spring, 50... Compression spring, 5
1...Retaining plate.

Claims (1)

[Claims] 1. In addition to an electric conversion mechanism that converts the tongue rail by sliding an operating rod connected to the tongue rail using power from a motor, the wheel is connected to the tongue rail via the opening side tongue rail that is separated from the basic rail. In an indexing electric point machine having an indexing mechanism that causes the operating rod to slide and change the tongue rail when an external force is applied from a flange portion, the operating rod is provided so as to be slidable in the same direction as the sliding direction of the operating rod. an elastic member that connects the slide member and the operating rod and is arranged to be expandable and retractable in the sliding direction of both; and a locking means that locks the slide member in a non-slidable state when the tongue rail conversion is completed. , a first unlocking means for unlocking the locking means in the middle of sliding the operating rod when the operating rod is actuated by an external force from the opening side tongue rail; and before the operating rod starts sliding when the operating rod is actuated by the power of the motor. and a second unlocking means for unlocking the locking means. 2 In addition to the electric conversion mechanism that converts the tongue rail by sliding the operating rod connected to the tongue rail using power from the motor, external force from the wheel flange is applied via the opening side tongue rail that is separated from the basic rail. In an indexing electric point machine having an indexing mechanism that causes the operating rod to slide and change the tongue rail when the operating rod is connected, the sliding member is provided so as to be slidable in the same direction as the sliding direction of the operating rod; an elastic member that connects the slide member and the operating rod and is disposed so as to be expandable and retractable in the sliding direction of both; a locking means that locks the slide member in a non-slidable state when the conversion of the tongue rail is completed; and the opening side tongue rail. a first unlocking means for unlocking the locking means in the middle of sliding the operating rod when the operating rod is actuated by an external force; and a second unlocking means for unlocking the lock, and the switching roller of the electric conversion mechanism rotated by the power from the motor is directed toward the opening direction of the notch opening of the operating rod that engages during electric conversion. An indexing electric point machine was once characterized by having a tapered surface that expanded.