JPH0442324Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a track girder device for a suspended monorail, which features a running rail that guides the running wheels of the suspended monorail.

As shown in FIGS. 1 to 5, a pair of running rails are connected to each other at a distance from each other on the inside of both lower ends of both side webs 1a, 1a of a track girder 1 having a gate-shaped cross section. An upper flange 2 that forms a running horizontal plane for the running wheels is connected to the inside of the lower end of the web by welding or the like, a web 3 that is welded along the center of the lower surface of the upper flange 2, and a lower part of the web 3. It has a structure having an I-shaped cross section with a lower flange 4 welded along the edge, so that the load W of the suspended monorail is repeatedly applied to the upper flange 2 of the traveling rail via the traveling wheels. It's summery.

However, in the conventional track girder device for a suspended monorail, the running rail is formed in an I-shaped cross section with the above-described structure, and when the load W in the direction of the arrow shown in FIG. 1 is repeatedly applied, Lower flange 4
Since the strength is significantly reduced due to fatigue of the welded part between the weld and the web 3, the lower flange 4 has to be made extremely thick to reduce the stress level, which has the disadvantage of increasing the amount of steel and weight. has and also
The lower flange 4 is welded to a bracket plate 6 constituting the lower part of reinforcing ribs 5 arranged at appropriate intervals in the length direction on the outer periphery of the track girder 1, and the joint between the lower flange 4 and the lower flange 4 is welded. In order to prevent the strength from decreasing due to fatigue, the parts must be rounded as shown in FIG. 5, which has the drawback of increasing manufacturing costs.

The present invention is an invention to eliminate the above-mentioned drawbacks of the conventional track girder of a suspended monorail, and includes an upper flange that forms a running horizontal surface for the running wheels and a lower surface of the upper flange on the inside of the lower part of both side webs of the track girder. The present invention is characterized in that a pair of traveling rails each made of a section steel having at least a lower edge protrusion welded along the sides are provided in series with an interval provided between them.

In the present invention, with the above-mentioned configuration, a pair of running rails which are connected with each other at a distance from each other inside the lower part of both side webs of the track girder are connected to the upper flange forming the horizontal running surface of the running wheels and the lower surface side of the upper flange. Since it is formed from a section steel having at least a lower edge protrusion that is integrally welded along the rail, even if the load of the suspended monorail is repeatedly applied to both running rails via the running wheels, the upper The section steel with at least a lower edge protrusion welded integrally along the lower surface of the flange makes it an excellent fatigue-resistant member, and its rigidity is significantly increased, resulting in significantly improved travel guidance performance and reliability. At the same time, the amount of steel and weight are significantly reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. An embodiment of the present invention is shown in FIGS. 6 to 8, in which 1 indicates a track girder with a portal cross section having webs on both sides, and 5 indicates the outer circumference of the track girder 1 at appropriate intervals in the length direction. The reinforcing ribs a and a are attached by welding or the like, and a and a are guide rails for guide wheels (not shown) provided on the lower inner side of both side webs of the track girder 1, and in this embodiment, is orbit girder 1
The running rails, which are connected by welding or the like on the inside of both lower parts of both side webs 1a, are connected to an upper flange 2 which is oriented horizontally to form a running horizontal plane for running wheels (not shown). Lower edge protrusion 10 integrally welded along the lower surface side
The lower end of the reinforcing steel rib 5 was joined to the shaped steel 10 by welding or the like after removing the bracket plate.

Since the embodiment of the present invention has the above-described configuration, even if the load W of the suspended monorail is repeatedly applied to the upper flange 2 of the traveling rail having the above-mentioned configuration through the traveling wheels, the upper flange 2 Shaped steel 1 integrally welded along the lower surface side
0 has an integral lower edge protruding strip 10a on its lower edge, which eliminates the need for welding the lower flange 4 and web 3 as in the prior art, and provides strength that does not reduce strength due to fatigue of the welded part. As the rigidity is significantly increased, the running guide performance and reliability of the running rail are significantly improved.Furthermore, the above-mentioned excellent strength and significant increase in rigidity due to the section steel 10 are achieved. Therefore, the conventional lower flange is not required, making it possible to save the amount of steel and reduce the weight. Furthermore, there are fewer welding points, which simplifies the joint structure and significantly reduces manufacturing costs.

In the above-mentioned embodiments, a structure in which the shaped steel has a lower edge protrusion has been described, but scalene thick angle shape steel, scalene angle shape steel, etc. can also be used in place of the lower edge protrusion.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing the track girder of a conventional suspended monorail, Figure 2 is a vertical cross-sectional view of the - part in Figure 1, Figure 3 is an enlarged cross-sectional view of the part shown in Figure 1, and Figure 4. is a plan view showing a cross section of the − part in FIG. 3;
Fig. 5 is a plan view showing the cross section of the - part in Fig. 6, Fig. 6 is a cross-sectional view of a track girder showing an embodiment of the present invention, and Fig. 7 is a longitudinal cross-section showing the cross section of the - part in Fig. 6. 8 is an enlarged cross-sectional view of the portion shown in FIG. 6. 1...Race girder, 2...Upper flange, 5...Reinforcement rib, 10...Shape steel, 10a...Lower edge projection strip, A...Interval.

Claims (1)

[Scope of utility model registration request] A pair of steel sections are provided on the inside of the lower part of both side webs of the track girder, and are made of an upper flange that forms a horizontal running surface for the running wheels, and a section steel having at least a lower edge protrusion welded along the lower surface side of the upper flange. A track girder device for a suspended monorail characterized by running rails connected to each other at intervals.