JPS5812401B2 - Point girder with guide surface bending mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a point girder for a box-shaped cross-section track having a guide plate bending mechanism, and is suitable for a point device for a normal conducting magnetically levitated vehicle track.

In conventional monorail car point equipment, a flexible method that bends the girder integrated with the guideway has a limited lifespan and requires a large installation space, so a method that only bends the guideway has been proposed. It has been adopted.

Figure 1 is a plan view of a conventional point girder, Figure 2 is an enlarged plan view of the girder in Figure 1, Figure 3 is an enlarged cross-sectional view taken along line A-A in Figure 2, and Figure 4 is an enlarged view of the girder. FIG. 5 is a plan view showing the support state of the guide and stabilizing face plates, and a side view of the actuating mechanism provided within the girder.

The operation of the bending mechanism of the guide face plate and the stabilizing face plate will be explained with reference to the drawings. When hydraulic or pneumatic pressure is applied to the cylinder 13, the gear shaft 4 is rotated by the lever 12 via the arm 5.

When the gear shaft 4 rotates, the gears 6 and 9 on both sides rotate, and the camshaft 7 rotates.

When the camshaft 7 rotates, the gum 8 attached to the camshaft 7
Accordingly, the interlocking rod 11 is moved to the left or right by the protrusion 10, and the guide face plate 2 and the stabilizing face plate 3 are respectively bent by the required amount.

These mechanisms are installed inside the girder body 1.

In the conventional point girder described above, the cams and gears require high-precision machining, and the girders to which they are attached also require high-precision machining.

In addition, since it has many parts and is relatively large, it is difficult to maintain and inspect, and it may be difficult to install it as a point girder for a track with a small girder cross section, making it unsuitable.

The present invention provides a point girder having a guide plate bending mechanism,
The objective is to obtain a point girder that has fewer components, requires less space for installation, and is easier to maintain and inspect.

In the present invention, several interlocking rods connecting the left and right guide face plates are connected by a suspension link and a connecting link, and the force application point of the suspension link is connected to an actuator whose one end is fixed to a girder to bend the guide face plate. It has a simple structure and a reduced number of parts.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below using an example in which the present invention is applied to a point girder for a normally conducting magnetically levitated vehicle track.

Figure 6 is a plan view showing the entire point girder, Figure 7 is an enlarged plan view of the girder, Figure 8 is a sectional view taken along line B-B in Figure 7, and Figure 9 is support for the guide face plate of the girder. A plan view showing the state, Fig. 10 is a perspective view of the link mechanism installed in the girder, Fig. 11 is a detailed plan view of the connection between the actuator and the link mechanism, and Fig. 12 shows the hydraulic pressure for switching left and right movement of the guide face plate. It is a connection diagram of a circuit.

In the figure, 21 is the girder body of the point girder.

The girder main body 21 is composed of a box cross-section made up of a side plate 22, an upper plate 23, and a lower plate 24, an air bearing surface plate 25 fixed to the upper plate 23, an auxiliary wheel receiver 26, and a movable guide surface plate 27.

The guide face plate 27 is supported at both ends by the girder body 21 by hinges 31.

The left and right guide plates 27 are connected by an interlocking rod 28,
The interlocking rod 28 is provided with a stopper 29 that determines the amount of movement δ of the guide face plate 27.

The interlocking rod 28 passes through the left and right auxiliary wheel receivers 26 (which serve as locking members for the stopper 27), and is connected to the guide surface plate 27 by a pin 30.

Each interlocking rod 28 is connected by a tether link 32.33, and the tether link 32.33 connects an actuator 35 with one end connected to the girder body 21 via a suspension link 34.
is combined with

The actuator 35 is connected to a hydraulic circuit shown in FIG.

This hydraulic circuit includes an accumulator 41, a check valve 42,
Switching valve 43, check valve 44, hydraulic pump 45, electric motor 45
, a bypass valve 47, a relief valve 48, a filter 49, and an oil tank 50.

Therefore, the suspension % of actuator 35 - IJ link 3
The force application point 51 to the actuator 3 is attached to each interlocking rod 28.
The distance 4, t3 between the point of action 52.53 of the suspension link 34 and the actuator 35 is such that equal force acts from the suspension link 34 and the connecting link 32.33 from the suspension link 34.
The distance t1 between the actuator 35 and the interlocking rod 28 is determined.

For example, in FIG. 11, if no connecting link is connected from the left to the left interlocking rod 28 and ll is zero, then the number is 424.

In the above configuration, when the actuator 35 is actuated by hydraulic pressure, the suspension link 34 pushes the points of action 52, 53 with the connecting link 32, 33, and moves each interlocking rod 28 to the left via the connecting link 32, 33. Alternatively, the guide surface plate 27 can be bent in a predetermined direction by moving it to the right.

The amount of movement of the guide plate 27 is determined by the stopper 29 and the auxiliary wheel holder 26.
It is determined by the gap δ between the

The bending direction of the guide face plate 27 to the left and right can be switched using the switching valve 4.
By switching 3 to position A or A, the supply of pressure oil to chambers a and b of the actuator 35 can be switched.

The pressing force by the actuator 35 is
5's force application point 51 and the action points 52, 53 of the suspension link 34
It acts equally on each interlocking rod 28 depending on the ratio between them.

Therefore, by making the force acting on each interlocking rod 28 equal and larger than the lateral load when a vehicle passes, it is possible to prevent the guide face plate from being displaced by the vehicle passing and maintain its curvature.

Incidentally, in order to eliminate the effects of oil leakage, oil temperature changes, etc., and to maintain a constant pressing force on the guide surface plate, an accumulator 41 is provided in each circuit.

Although the embodiments described above use a hydraulic cylinder as an actuator, the actuator can also be operated using a pneumatic cylinder or an electric piston.

13 and 14 show a case where the present invention is applied to a box-shaped point girder of a monorail car as shown in FIG. 3.

FIG. 13 shows a cross section of the girder when the box-type point girder main body 1 is equipped with the mechanism shown in FIG. 10 for bending the guide face plate 2 and stabilizing face plate 3, and FIG. ', stopper 29', pin 30', hinge 31', connecting link 3
Guide surface plate 2 consisting of 2', 33', and suspension link 34'
and the bending mechanism of the stabilizing face plate 3.

The upper and lower bending mechanisms are connected by a connecting rod 51, and an actuator 35 is disposed at the midpoint of the connecting rod 51, so that the guide face plate 2 and the stabilizing face plate 3 can be bent simultaneously with one set of actuators.

According to the present invention, there are no parts such as cams and gears that require high-precision machining, and there are few machined parts on the girder body to which these parts are attached.Furthermore, since the number of parts is small and only pin joints are used, there are few parts that wear out and there are fewer maintenance inspections. Since it is easy to install and does not take up much installation space, it has the effect of being able to be installed even on girders with small cross sections.

[Brief explanation of drawings]

Figures 1 to 5 show conventional point girders, where Figure 1 is an overall plan view of the point girder, Figure 2 is an enlarged plan view of the girder body, and Figure 3 is Figure 2. FIG. 4 is a plan view showing the support state of the guide plate, and FIG. 5 is a side view of the operating mechanism inside the girder body. 6 to 12 show the point girder of the present invention, FIG. 6 is an overall plan view of the point girder, FIG. 7 is an enlarged plan view of the girder body, and FIG. 9 is a plan view showing the supporting state of the guide plate, FIG. 10 is a perspective view of the link mechanism inside the girder, and FIG. 11 is a detailed plan view of the connection between the actuator and link mechanism. , FIG. 12 is a connection diagram of a hydraulic circuit, and FIGS. 13 and 14 are a sectional view and a perspective view of the present invention applied to a box-type point girder. 21...Girder body, 22...Side plate, 23...Top plate, 24...
...Lower plate, 27...Guide plate, 28...Interlocking rod, 25...
Air bearing surface plate, 26... Auxiliary wheel holder, 29... Stopper, 31
... Hinge, 32, 33, 34 ... Hanging link, 35
...actuator, 41 ...accumulator, 42
, 44...Check valve, 43...Switching valve, 45...Hydraulic pump, 46...Electric motor, 47...Bypass valve, 50...Oil tank.

Claims (1)

[Claims] 1. In a switch girder for a box-shaped cross-section track in which only the guide plate provided separately from the girder body is bent to match the track alignment when switching, the left and right guide plates are connected by multiple interlocking rods, When the guide face plate is moved, a stopper is provided on the interlocking rod so that the guide face plate forms a required curved surface, and a locking member for the stopper is provided, and these interlocking rods are connected with a connecting link, and the connecting link is connected at one end are connected to the girder body by a suspension link connected to an actuator, and the connecting link of the suspension link is connected to the point where the actuator applies force to the suspension link so that equal force is applied from the actuator to each interlocking rod. A point girder having a guide surface bending mechanism, characterized in that the point of application to the point is determined.