JPH04136302A - Locking device for switch-and-lock movement apparatus - Google Patents

Abstract

PURPOSE:To enable operation space necessary for locking and unlocking a lock piece to be reduced by inserting the lock piece in the notch of a locking lever, and providing a link for connecting an intermittent motion cam to the lock piece. CONSTITUTION:A motor 1 is driven to start the shift of an operation lever 4. Then, the slide face F of an intermittent motion cam 9a is moved with a shifting roller 8a, thereby pushing the shifting face E of the cam 9a and causing the rotation thereof. Thereafter, a lock piece 7a is pulled out of a locking lever notch 6a via a link 10a. Furthermore, a roller K for a retaining mechanism is coupled to a recess G around the external surface of the intermittent motion cam 9a and the rotation thereof is prevented. Thereafter, when the operation lever 4 is shifted, the aforesaid roller K is disengaged from the recess G around the external surface of the intermittent motion cam 9a, and a lock piece 7b is inserted in the notch 6b of the locking lever, thereby interrupting the power of the motor 1. According to the aforesaid construction, the locking and unlocking operation of the lock pieces 7a and 7b can be undertaken within the minimum required shift space.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a locking device for a switching machine that performs switching locking via an escape crank in order to switch and lock the tongue rail or movable rail of a turnout in a railway.

[Conventional technology]

Conventionally, a switch machine releases the lock by removing the lock piece from the notch of the locking pin (unlocking operation), moves the operating pin in any horizontal direction (converting operation), and locks when the movement is completed. The mechanism operates by inserting a lock piece into the notch of the can and locking it (locking operation). This l1ll! is also used when converting and locking a tongue rail or movable rail using an escape crank. Point machines have been used that operate in sequence. However, the escape crank has a locking function, and when this switch is used in conjunction with the switch, the escape crank unlocks, switches, and unlocks due to the switching operation of the switch, so the switch and escape A large amount of time is consumed in unlocking and unlocking the crank, and conversion operations that apply a large load must be performed in a short period of time, and a large amount of energy is required to convert the same load. Therefore, by attaching a lock piece directly to the operating lever of the switch and locking or unlocking the lock via the reciprocating movement of the operating lever, the switch can be activated while the escape crank is locked or unlocked. Start locking or unlocking and finish locking or unlocking the escape crank and switch machine at the same time, increasing the time available for load switching, converting efficiently with less energy, and locking. An electric switch with a simplified mechanism has been published as a patent (Japanese Unexamined Patent Application Publication No. 1992-192901). [Problems to be Solved by the Invention] In the case of the switch machine disclosed in JP-A-1-192901, since the lock piece is directly attached to the operating link, there are the following drawbacks. To explain the locking of the lock piece 7a with reference to FIGS. 6 and 7, in order to unlock the locked lock piece 7b and lock the unlocked lock piece 7a, it is necessary to change the lock piece 7a to the locked state. A minimum operating stroke of 8 minutes is required to provide space for the lock piece 7b to move, and in the case of a switch that operates the lock piece 7b inside the body, the length of the body becomes longer. Since the insertion depth of the lock piece is determined by the movement stroke amount corresponding to the escape stroke of the escape crank 20, the insertion depth of the lock piece cannot be increased, and the required locking strength is secured. The height of the lock had to be increased. [Means for Solving the Problems] Now, the configuration will be explained with reference to FIG. 11. (a) A shaft 16a taken out from the body 15 of the switch machine. Intermittent rotating cams 9a and 9b are provided rotatably supported around 18b. (b) Attach conversion rollers 8a, 8b on the operating link 4 for moving the intermittent rotating cams 9a, 9b. (c) Conversion rollers 8a and 8b are activated by the movement of the operating pin 4.
a holding mechanism 13a that maintains the state of the intermittent rotating cams 9a, 9b when the intermittent rotating cams 9a, 9b are separated;
13b is provided. (d) Links 10a, 10 connecting the lock pieces 7a, 7b to be inserted into the notches 6a, 6b of the lock pin, the intermittent rotating cams 9a, 9b, and the lock pieces 7a, 7b.
b. The locking device for the switch machine is configured as described above. [Function] In this way, the conversion roller 8a on the operation plane. The intermittent rotation cams 9a and 9b rotate only when the intermittent rotation cam 8b pushes the switching surface E of the intermittent rotation cam, and do not rotate when they are in a position other than 9. Therefore, the lock piece 7
a and 7b are horizontally moved only when the intermittent rotating cams 9a and 9b rotate. Furthermore, the amount of horizontal movement of the lock pieces 7a, 7b can be changed arbitrarily by changing the mounting positions of the links 10a, 10b on the intermittent rotating cam. (Example 1 An example of the present invention will now be described based on the drawings. In FIGS. 1 and 12 showing this example, motor 1
The power is transmitted to the ball screw 3 via the gears 2a and 2b, and the rotation of the ball screw 3a supports the operating pin 4 so that it can reciprocate in the axial direction of the ball screw. Conversion rollers 8 are installed on both sides of the ball screw in the axial direction of the operating pin 4.
a, 8b are attached, and intermittent rotating cams 9a, 9b are installed, which are rotatably supported around shafts lea, 16b taken out from the housing 15 of the switch machine, and the conversion rollers 8a, 8b are intermittent rotating cams. The intermittent rotating cams 9a, 9b can be rotated by pressing the switching surface E of the cams. In addition, the movement of the operating pin 4 causes the conversion roller 8a to change. A holding mechanism 13 that maintains the state of the intermittent rotating cams 9a, 9b when the intermittent rotating cams 8b are separated from the intermittent rotating cams 9a, 9b.
a. 13b is provided. In this holding mechanism 13a, 13b, a roller K is constantly pushed up by a spring L, and the roller is fitted into a recess G provided on the outer periphery of an intermittent rotating cam.
Rotation of the intermittent rotating cams 9a, 9b is prevented. Lock pieces 7a and 7b, intermittent rotating cams 9a and 9b, and lock piece 7a to be inserted into locking pin notches 8a and 6b. Links 10a and 10b are provided to connect 7b. The switch machine constructed in this way is connected to the driving crank 20a of the escape crank 20 with the iron 17 as shown in Fig. 118, and the escape crank is connected to the switch rod 21 connecting the two tongue rails 22a and 22b. 20 driven cranks 20b are connected by a switch adjuster 19. The ends of the two tongue rails 22a and 22b are connected to each other by a front rod 24, and the center of the front rod 24 and the locking pin 5 are connected to each other by a connecting pin 18. Therefore, when the operating switch 4 of the switch machine shown in FIG.
The lock pin 5 connected to the lock pin 5 moves upward, and when the tongue rail 22b comes into contact with the basic rail 23b, the lock piece 7b is brought to a position where it can be inserted into the notch 6b of the lock pin 5. Next, a description will be given of the operation of the switch having such a configuration when moving from the state shown in FIGS. 1 and 2 to the state shown in FIGS. 3 and 14. When motor 1 is driven, its rotational force is transferred to gears 2a and 2b.
, the ball screw 3a and the movement link 4 begin to move. The movement of the operating pin 4 causes the conversion roller 8a to move on the sliding surface F of the intermittent rotation cam 9a, and when the conversion surface E is pressed, the intermittent rotation cam 9a rotates to the left, locking the lock piece 7a via the link loa. The roller K of the holding mechanism fits into the recess G on the outer periphery of the intermittent rotating cam 9a, and prevents the intermittent rotating cam 9a from rotating. When the operating ring 4 further moves to the right, the conversion roller 8b pushes the conversion surface E of the intermittent rotation cam, and the intermittent rotation cam 9b rotates to the left, and when the roller K of the holding mechanism is removed from the recess G on the outer periphery of the intermittent rotation cam, The lock piece 7b is inserted into the notch 6b of the locking pin via the link 10b. As soon as the lock piece 7b is inserted, the detection fitting 11b attached to the lock piece 7b pushes the limit switch 12b, and the power to the motor 1 is turned off. The actuator 4 moves further to the right due to the inertia of the motor 1, the actuator 4, etc., but the conversion roller 8b does not rotate because it moves on the sliding surface F of the intermittent rotating cam. Therefore, lock piece 7
b does not move. When the movement wheel moves from left to right, the movement is the opposite of the above movement, so it will be omitted. [Effects of the Invention] In this way, the switching roller 9a on the operation side. The intermittent rotating cams 9a and 9b rotate only when 9b pushes the switching surface E of the intermittent rotating cam, and do not rotate when they are in other positions. Therefore, the lock piece 7a
, 7b move horizontally only when the intermittent rotating cams 9a, 9b rotate. Moreover, the horizontal movement t of the lock pieces 7a and 7b is caused by the link 1 on the intermittent rotating cam.
The installation of 0a and 10b can be set arbitrarily by changing their positions. Therefore, the lock pieces 7a and 7b only need to have the minimum necessary movement space for locking and unlocking operations (the sum of the lock piece thickness D and the distance d from the locking pin in Figure jI7), and the operation is easy. When the lock pieces are directly attached to the lock pieces, a space corresponding to the movement stroke S required for movement of the lock pieces 7a and 7b is no longer required. In addition, when switching the tongue rail or movable rail via the escape crank 20, the operation of the switch corresponds to the range in which the roller H of the driving crank 20a of the escape crank slides on the escape surface I of the driven crank 20b. It is possible to secure a locking depth sufficient to lock the locking pin 5 within the range of the locking pin stroke, and the operation timing of the locking pieces 7a, 7b can be arbitrarily selected.

[Brief explanation of drawings]

FIG. 1 shows a plan view of the locking mechanism of the switch machine of the present invention (when the operating switch is on the right). FIG. 2 shows a side view of the locking mechanism of the switch machine of the present invention (when the operating lever is on the right). FIG. 3 shows a plan view of the locking mechanism of the switch machine of the present invention (when the operating switch is on the left). FIG. 4 shows a side view of the locking mechanism of the switch machine of the present invention (when the operating lever is on the left). Figure 115 shows a three-dimensional view of the locking mechanism of the switch of the present invention (when the operating lever is on the right). FIG. 6 shows the relationship between the locking pin and the lock piece of the switch disclosed in JP-A-1-192901. FIG. 7 shows the relationship between the locking pin and the lock piece of the switch machine of this embodiment. FIG. 8 shows a switch machine disclosed in Japanese Patent Application Laid-open No. 1-192901. 1. Motor 2a, Gear 2b, Gear 31, Ball screw with 3 threads, Ball nut 4, Operating pin 5, Lock pin, Thickness d of lock piece, Distance from lock pin 6a, Notch in lock pin 6b, Chain Lock notch 7a, lock piece 7b, lock piece 8a, conversion roller 8b, conversion roller 9a, intermittent rotation cam 9b, intermittent rotation cam E2 conversion surface F1 of intermittent rotation cam sliding surface G3 of intermittent rotation cam recess 10a, link 10b, link 11a, detection fitting 11b, detection fitting 12a, limit switch 12b, limit switch 13a, holding mechanism 13b, holding mechanism 14a, support stand 14b, support stand 15, intermittent rotating cam of body 16a0. Axis 16b0 Intermittently rotating cam shaft 17, Rondo 18, Connection pin 19, Switch adjuster 20, Escape crank 20a, Escape crank driving crank 20b, Escape crank driven crank H0FK Moving crank roller ■, Driven crank escape surface J, Driven crank conversion surface 21, rolling rod 22a, tongue rail 22b, tongue rail 23a, basic rail 23b,! Book seal 24, front rond

Claims (1)

[Scope of Claims] (a) An intermittent rotating cam is provided that is rotatably supported around a shaft extending from the body of the switch machine. (b) Install a conversion roller on the movement plate to move the intermittent rotating cam. (c) A holding mechanism is provided to maintain the state of the intermittent rotation cam when the conversion roller is separated from the intermittent rotation cam due to movement. (d) A lock piece to be inserted into the notch of the locking pin and a link connecting the intermittent rotation cam and the lock piece are provided. A locking device for a switch machine configured as described above.