JPH0123886Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a low-noise skirt that surrounds the lower part of a bogie of a rectangular monorail vehicle, for example, and is particularly suitable for absorbing running noise and reducing noise of a vehicle. It's about skirts.

[Conventional technology]

Conventionally, the lower skirt structure of the bogie section of a pedestal monorail vehicle has consisted of an openable and closable skirt that surrounds the entire undercarriage, and a separate, fixed skirt on the bogie side that surrounds only the stability wheels. The frequency of maintenance and inspection of bogie parts is very high, and inspections around the guide and stabilizing wheels are usually carried out through the gap between the track girder and the skirt, but the gap is made as small as possible in order to reduce the radiated sound of bogie running. Therefore, it had the disadvantage of poor workability. In addition, the low-noise treatment on the back side is done with a sound-absorbing layer that follows the external shape of the lower skirt and has a uniform thickness, so the sound absorption coefficient is relatively small, and the sound radiated from the skirt opening becomes large. In addition to the drawbacks, there was also the problem that there was a risk that the insulation effect between the current collector and the vehicle body side would be lost due to snow accumulating on the bottom surface of the lower skirt.

[Purpose of invention]

An object of the present invention is to allow the lower skirt to open by itself without providing a drive means or a special member for moving the center of gravity, and to allow the lower skirt to open at least on the bogie when the lower skirt is opened. It is an object of the present invention to provide a low-noise skirt that is located outside of the structural members, improves the sound absorption effect and prevents snow from accumulating, and has a simple and strong fixing structure to the vehicle body.

[Summary of the idea]

In this invention, a sound-absorbing material is attached to the inner surface, and an air layer is formed on the inner side of the sound-absorbing material except for the vicinity of the stabilizing wheels at the central part of the vehicle in the longitudinal direction, and the sound-absorbing material is tilted at a steep angle together with the punching plate. A skirt installed in the vehicle is rotatably supported by a support point that connects the outer position of the skirt in the vehicle width direction with a skirt support of the vehicle body, and the lower part of the skirt is shaped to wrap around the lower part of the underfloor equipment, Further, the outer circumferential surface of the skirt is inclined toward the center in the vehicle width direction as it goes downward, and when the skirt is supported only at the support points, the center end of the skirt in the vehicle width direction is at least connected to the bogie component. The center of gravity can be located further outward, and locking means for fixing the skirt to the vehicle body is provided at the end of the skirt in the longitudinal direction of the vehicle and at the center end in the width direction of the vehicle. be.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 9. In the same figure, 1 is the vehicle body, 2
1 shows a bogie configured to straddle the track girder 3, and there are a stabilizing wheel 5, a guide wheel 4, and a current collector 10 at the bottom of the bogie 2, and a skirt support 12 provided at an outer position in the width direction of the car body 1. A lower skirt 6 hangs down through it. Reference numeral 9 denotes a locking device for fixing the lower skirt 6 to the vehicle body 1 side, which is installed at the center side in the width direction of the vehicle at both ends of the lower skirt 6 in the longitudinal direction of the vehicle, and is arranged in such a manner that the lower skirt 6 can be supported most stably. There is. The lower skirt 6 has an outer circumferential surface that is inclined inward in the vehicle width direction toward the bottom, and has a tire portion 8 at the center in the longitudinal direction of the vehicle and an enclosure whose inclination in the longitudinal direction of the vehicle is changed with respect to the tire portion 8. It has a shape that extends from the support point 26 to the lower part of the stabilizing ring 5. 11 shows the self-opening state of the lower skirt 6, which shows that the gap size W with the track girder 3 changes to the gap size W' when the lower skirt 6 is opened. That is, in the open state supported only by the support points of the lower skirt 6, the center end of the lower skirt 6 in the vehicle width direction is at least closer to the vehicle body than the outer side of the members constituting the bogie 2, such as the stabilizing wheels 6. The center of gravity G of the lower skirt 6 is set so as to have a gap W' with the track girder 3 located on the outside in the width direction. The inclined shape of the lower skirt 6 is very effective in locating the center of gravity G at the center in the width direction of the vehicle without providing any special member. In addition, a sound absorbing material 15 is attached to the entire surface of the back surface of the lower skirt 6 to reduce noise, and a sound absorbing material 17 is attached at an acute angle to the surrounding portion 7 to prevent snow from accumulating on the back surface of the lower skirt 6. It is a material. 16 is a punch plate for protecting the sound absorbing material, and 18 is a closing plate for reducing direct radiation sound from the side opening 27. Sound absorbing material is attached to the upper and lower surfaces, and as shown in FIG. It is provided. 13 is a mount cover with sound absorbing material on the vehicle body 1 side.

As shown in FIGS. 6 to 9, the structure of the locking device 9 includes a receiver 19 for a hook 20 provided on the side of the vehicle body 1, a pin receiver 22 with a double lock system, and a frame provided at the front and rear of the lower skirt 6. 25 has a hook 20 that can be automatically locked by pushing it in and an insert type lock pin 23, and the hook 20 is unlocked by pulling a pull bar 21. 28 is a return spring for the pull rod 21, and 24 is a fixing spring for the lock pin 23.

To explain the operation based on the above configuration, in order to reduce running noise, the following measures are taken as a general rule: after taking measures against the sound source, the area around the sound source is made wider and surrounded with smaller gaps, and the inner surface is treated for sound absorption.
Therefore, the lower skirt is also hinged at the support point 26 to the skirt support 12 as a vehicle body side support that is advantageous in terms of strength, and the gap size W is also reduced to a possible range. On the other hand, inspection of the lower surface of the stabilizing wheel 5 and current collector 10
When replacing the shoe, the lower skirt 6 is opened in order to enlarge the above-mentioned gap dimension W so that the worker can fit in. However, the center of gravity G of the lower skirt 6 is changed from the skirt shape and the mounting position of the sound absorbing material to the track girder. 3 side, the gap W' between the track girder 3 and the track girder 3 when it is released by itself becomes large, and maintenance and inspection work is easy.
Further, even when separating the vehicle body 1 and the truck 2, which is a large-scale maintenance and inspection work, the separation can be performed without the constituent members of the lower skirt 6 and the truck 2 coming into contact, resulting in good work efficiency. Note that since the support point 26 is hinged as described above, the lower skirt 6 when opened is
The position of the center of gravity is directly below the support point 26.

Next is the installation of sound absorbing material on the back side of the lower skirt 6, but since the cross-sectional shape of the lower skirt 6 is almost L-shaped, snow may accumulate during snowfall, and the center of gravity should be moved closer to the track girder 3 side. As shown in FIG. 5, the sound absorbing materials 17 are provided at an acute angle different from the inclination angle of the lower skirt 6 by a distance l. This prevents snow from accumulating, moves the center of gravity to the track girder 3 side, and creates an air layer with a size l between the sound absorbing materials 15 and 17, so that low frequency component noise can also be absorbed. In addition, since a closing plate 18 with sound absorbing material attached to the upper and lower surfaces is installed in the side opening 27,
In addition to having a resonance sound absorption effect unique to the type, it also helps move the center of gravity of the lower skirt 6 toward the track girder 3. The locking device 9 locks the lower skirt 6 while the vehicle is running.
This is a double locking device so that the lock cannot be opened by oneself, and is normally fixed to the vehicle body side with a hook 20 and a lock pin 23. By pulling the pull rod 21, the hook 20 is disengaged from the receiver 19 and moved to the two-dot chain line position to be unlocked.The lock pin 23 is removed from the pull-out pin receiver 22 in the direction of the arrow and rotated to the two-dot chain line position. This allows the large lower skirt 6 to be safely fixed and released. When locking the opened lower skirt 6 to the vehicle body 1 side, the hook 20 engages with the receiver 19 and can be locked by pushing the lower skirt 6 with the operator's hand. In addition, since the locking device 9 is provided at both ends of the lower skirt 6 in the vehicle longitudinal direction and at an inner position in the vehicle width direction, the locking device 9 is provided at an inner position in the vehicle width direction at both ends of the lower skirt 6 in the vehicle longitudinal direction. Since it is supported at both ends in the direction, it can be supported most stably and can prevent noise from occurring due to vibrations at the ends.

[Effect of idea]

According to the present invention, the lower skirt can be opened by itself without providing a drive means or a special member for moving the center of gravity position, and the end portion of the lower skirt in the vehicle width direction is at least a part of the bogie component when opened. Since it is located further outside, work efficiency can be improved even in maintenance and inspection work, especially work that involves separating the vehicle body and truck. Furthermore, the sound absorption effect can be improved by minimizing the gap between the track girder and the lower skirt and by providing a sound absorbing material on the inner surface. Furthermore, it is possible to prevent snow from accumulating inside the lower skirt. In addition, by supporting the lower skirt with a rotating support part and a locking device, both end positions are fixed in the vehicle width direction and in the longitudinal direction. It is also possible to prevent noise caused by vibrations in the parts.

[Brief explanation of the drawing]

Figure 1 is a side view of the monorail vehicle, Figure 2
The figure is a front view of the lower skirt that surrounds the lower part of the bogie.
The figure is a sectional view taken along line A-A in Figure 2, and Figure 4 is B in Figure 2.
-B sectional view, Figure 5 is a CC sectional view in Figure 2, Figure 6 is a front view of the locking device for fixing the lower skirt,
Figure 7 is its plan view, Figure 8 is its side view, and Figure 9 is its top view.
The figure is a sectional view taken along the line DD in FIG. 2... Trolley, 4... Guide wheel, 5... Stable wheel, 6
... lower skirt, 9 ... lock device, 10 ... current collector, 15, 17 ... sound absorbing material, 18 ... closing plate, 20 ... hook, 23 ... lock pin, 26
...support point.

Claims (1)

[Scope of utility model registration request] A skirt in which a sound-absorbing material is attached to the inner surface, and an air layer is formed on the inner side of the sound-absorbing material except for the vicinity of the stabilizing wheels in the central part of the vehicle in the longitudinal direction, and the sound-absorbing material is installed at a steep angle along with a punching plate. is rotatably supported by a support point that connects the outer position of the skirt in the vehicle width direction and the skirt support of the vehicle body, and the lower part of the skirt is shaped to wrap around the lower part of the underfloor equipment; The outer circumferential surface of the skirt is inclined toward the center in the vehicle width direction as it goes downward, and when the skirt is supported only at the support point, the center end of the skirt in the vehicle width direction is located at least on the outside of the bogie component. 1. A low-noise skirt for a vehicle, characterized in that the skirt has a center of gravity that can be positioned at a center of gravity, and is provided with locking means for fixing the skirt to a vehicle body at an end in the vehicle longitudinal direction and at a central end in the width direction of the vehicle.