JPH0341603B2 - - Google Patents

Description

[Detailed Description of the Invention] The present applicant had previously proposed a "small track section transportation device" in which a vehicle is supported by rubber tires and air floating pads in patent application No. 2881 of 1980, but the present invention The invention relates to a running surface for a rubber tire or an air levitation pad that supports a vehicle, which can be effectively used in the track of the above-mentioned transport device, and in particular to an expansion joint of the running surface useful for an air levitation pad.

An object of the present invention is to prevent flat surfaces from being interrupted and to prevent part of the flat surface from being missing at the joints of elevated girders, etc., which are basic structures that constitute vehicle passages. To provide an expansion joint on a running surface that allows smooth running of air float pads, reduces outflow loss of air from air floating pads, and is sufficiently applicable to cases where gap changes are large, such as in foundation structures.

Another object of the present invention is to provide an expansion joint for a running surface having a structure that follows the elastic deflection or other displacement of a substructure such as an elevated girder forming a vehicle passageway.

In general, at the joints of foundation structures such as roads and tracks that serve as vehicle passageways, such as elevated girders, there are changes in the joint gap due to temperature expansion and contraction of the girder, as well as changes in the joint gap due to deflection of the girder due to vehicle loads (discussed later in the explanation of Figure 4). ) also occurs. In order to allow the vehicle to run smoothly even at the joint portion with such a gap, it is necessary to provide continuous support for the vehicle, and a so-called expansion joint is used here. The running surface of a rubber tire (including the rolling surface of a guide wheel of a rubber tire) has a shape shown in Figure 4 of Patent Publication No. 59202 of 1982, a so-called finger shape as shown in Figure 6 of the same publication, There are expansion joints such as the inclined type shown in Figure 14 of the same bulletin, and these have a structure that does not discontinue the plane (no wheel depression), so they are sufficient for practical use in vehicles with rubber tire support. It has an effect. However, when these expansion joints are used to support a vehicle using air floating pads, there are parts of the joints that are missing a part of the flat surface, which becomes a gap in terms of fluid and causes excessive fluid flow when the air floating pad passes through. Air leaks out and the vehicle cannot be supported adequately. As a solution to this problem, an expansion joint using a lip with a triangular cross section is proposed in Patent Publication No. 132511 of 1978, ``Track Device for Air Cushion Type Transport Equipment,'' but the same publication proposes an expansion joint using a lip with a triangular cross section, page 5, line 17. As mentioned above, the single orbit length is about 15m,
It is difficult to apply this method to long elevated girders that have a large amount of expansion and contraction. The reason for this is that the length of the lip must be longer than the amount of expansion and contraction, but a long triangular lip poses a problem in terms of strength.Furthermore, when the seam spacing increases, the lip falls down along the slope of the partner, creating triangular grooves on the running surface. This is because the air outflow from the air floating pad cannot be ignored. On the other hand, considering the construction conditions, elevated roads constructed over surface roads in cities are generally 30m to 40m long, and at road intersections, the length is 40m due to the convenience of surface road traffic.
It has become common to have girder lengths of ~50 m or more, and it must be assumed that such conditions will naturally be attached to elevated structures constructed within cities. In order to accommodate this, expansion joints are required that can tolerate changes in the seam spacing of several tens of millimeters.

The present invention eliminates the above-mentioned disadvantages of the known expansion joints and is capable of fully accommodating the amount of expansion and contraction required in construction.

The gist of the present invention is that, in a vehicle passageway where the two left and right running surfaces for the rubber tires or air floating pads that support the vehicle are flat, (1) they face each other at the joint of the foundation structure of the passageway; It consists of a running surface end member provided on each of the two basic structures, and a joint plate provided across the two running surface end members, (2) The joint plate is provided in the longitudinal direction of the passage. It is a flat plate whose end faces are non-parallel and basically has a triangular or trapezoidal planar shape; The joint plate moves in the direction across the aisle to fill the gap, and when the joint interval decreases, the joint plate is pushed out in the direction across the aisle. The upper surface of the edge is at the same height as the running surface and has a part that supports the joint plate one step below the upper surface of the edge. When the seam plate is pulled in or pushed in and the seam spacing decreases, the seam plate is pushed out in the cross-path direction. (6) The width of the seam plate is , the width shall be wide enough to include the minimum width necessary to support passing vehicles even when the joint plates are moving in the cross-pathway direction when the joint spacing is at its maximum; (7) The two joint plates shall be placed in symmetrical positions. This joint plate moving structure is provided with a spring that provides a moving force to move the joint plate in the direction across the passage.

According to the above configuration of the invention, the spring moves the seam plate in the cross-path direction and presses the end face of the seam plate against the edge of the running surface end member. As a result, when the seam spacing increases, the seam plate is pulled into or pushed into the seam, and when the seam spacing decreases, the seam plate is pushed out of the seam. In this way, an expansion seam is obtained that can accommodate variations in seam spacing.

The present invention will be explained below with reference to figures of embodiments.

FIG. 1 is a partial cross-sectional perspective view of the case where the expansion joint of the running surface of the present invention is implemented in patent application No. 2881 of 1982, ``Small track cross-section transportation device''. A vehicle 1 for transporting passengers is supported by a large number of air levitation pads 2, a propulsion vehicle 3 is supported by running wheels 4 made of rubber tires, and each vehicle has guide wheels 5, which support the pads 2 and running wheels. The wheels 4 are supported by a running surface 6, and the guide wheels 5 are guided by guide rails 7.As shown in the figure, the wheels 4 are supported by a running surface 6, and the guide wheels 5 are guided by guide rails 7. There are elevated track girders 8 and 9, the joints of which are provided directly above the piers 10, and the expansion joints of the present invention are used on the running surfaces of those parts. 11 is one running surface end member provided on the elevated track girder 8 (one of the opposing foundation structures), and 12 is the elevated track girder 9
Of the other running surface end members provided on (the other of the opposing foundation structures), the upper edge surfaces of these are shown and are at the same height as the running surface 6. 13
is a joint plate installed across both of them, and its planar shape is triangular (to be more precise, it is trapezoidal because there is a slightly flattened area at the apex of the triangle). There are two running surfaces per passage (one track), and joint components are distinguished by subscripts R and L in their numbers. Note that the joint plate moving structure is not shown.

When the seam interval increases, the seam plates 13R, 13
By moving outward in the transverse direction of the path (track), L acts to fill the gaps created between 11 and 13 and between 13 and 12. 14 is another bridge pier, and a joint for the elevated girder is also provided just above this pier, and an expansion joint for the running surface is also provided.

Figure 2 is a plan view showing one embodiment of the present invention.
The figure is a longitudinal cross-sectional view. Elevated girders 15 and 16, which are the basic structures of the passageway (track), face each other at the joint, and are provided with running surface end members 17 and 18, respectively, and are fastened with bolts.
A seam plate 19 is provided across the groove, and a groove 20
A joint plate moving structure consisting of the projections 21 and 21 is used for the joint plate, and these constitute the expansion joint of the running surface of the present invention.

The joint plate has both end faces 22 and 23 in the longitudinal direction of the passage which are non-parallel, and the planar shape is trapezoidal as shown in the figure, and the whole is flat plate-like. The running surface end members 17 and 18 have edges 24 and 25 that face and contact the end surfaces 22 and 23 of the joint plates, and the upper surfaces thereof are at the same height as the running surfaces 26 and 27 and are one step higher than the upper surfaces of the edges. It has portions 28 and 29 below that support the lower surface of the joint plate 19. The joint plate moving structure has a groove 20 on the lower surface of the joint plate 19 on the end surface 2.
2, 23 (in other words, parallel to the edge of the running surface end member), and the protrusion 21 supports the lower surface of the joint plate in the running surface end member.
It is installed protrudingly at 9. This protrusion consists of a shaft 30 and a roller 31. Left and right joint plates 19
A precompressed coil spring (not shown) is disposed therebetween. This coil spring connects the end surfaces 22, 23 of the joint plate 19 to the edges 24, 2 of the running surface end member.
It acts to push it towards 5. A groove 20 is parallel to the joint plate end surfaces 22 and 23, and a protrusion 2 is provided in this groove.
1 is engaged, the joint plate can only move relative to the edges 24 and 25 of the running surface end member, and
When the joint spacing of the foundation structure increases, the joint plate moves outward in the passageway cross direction due to the engagement effect of the groove 20 and the protrusion 21 under the pressing force of the coil spring, as shown by the dashed line. do. Also, when the joint spacing of the foundation structure decreases, the joint plate is sandwiched between the two running surface end members and both end surfaces 22 and 23 are pushed, and the cross-path component of the pressure pushes it toward the center of the path. . The width of the seam plate in the cross-path direction is the minimum width necessary to support passing vehicles both when the seam plate is moved furthest outward at the maximum seam distance and when it is moved furthest inward at the maximum seam distance. It has a width B that encompasses A.

Reference numeral 50 is a packing for closing minute gaps, and reference numeral 51 is a guide rail for guiding and running a guide rail car or the like.

The elevated girder 16 is connected to the elevated girder 1 via the fixed shoe 32.
5 is supported by the pier 10 via a movable shoe 33, and the end face of the elevated girder 15 does not move relative to the pier 10 even if the temperature expands and contracts, and the other end of the elevated girder 16 (not shown) is supported by a fixed shoe. Therefore, expansion and contraction due to temperature changes results in displacement of the movable shoe 33.
The end face of the elevated girder 15 moves and the joint interval G changes.

FIG. 4 is a side view illustrating the deflection of a commonly known elevated girder, and the solid line indicates the case where a vehicle load is applied in an unloaded state, and the two-dot chain line indicates the case. The elevated girder 16 undergoes vertical bending due to the load, creates a deflection angle at the support point, and rotates about the shoe 32. As a result, the top surface of the girder moves by δ and the seam interval increases. The value of this δ is the height h from the shoe to the running surface.
It is related to δ=h. In this way, there are factors other than temperature expansion and contraction that cause changes in seam spacing, and these must be taken into account when designing expansion joints.

Regarding the deflection of the elevated girder, the joint plate 1 shown in Fig. 3
The intermediate part C in the longitudinal direction of the passageway (track) at No. 9 is made particularly thin, and this part has flexibility in the vertical bending direction, and the deflection of the elevated girder, which is the foundation structure shown in Fig. 4, is made particularly thin. I'm trying to get the effect of following.

FIG. 5 is a plan view showing another embodiment having a joint plate moving structure which is a component of the present invention, and FIG. 6 is a cross-sectional view thereof. The configuration consisting of the running surface end member and the joint plate is the same as in the case shown in Fig. 2, but there is a difference in the joint plate movement structure, which uses a pre-compressed coil spring device. end member,
35 is the other running surface end member, and 36 is a joint plate whose actual planar shape is hexagonal, but the portion used as the running surface is up to the part shown by the dotted line, and its basic planar shape is trapezoidal. The plane has been extended into a hexagonal shape due to the relationship with the coil spring device. 37 is a pre-compressed coil spring that applies outward pressure to the left and right joint plates via a vertical arm 38. The vertical arm 38 is an arm stand 3 fastened to the upper surface of the elevated girder.
9 and has the function of holding the position of the coil spring 37.

As explained above, the expansion joint of the running surface of the present invention always supports the vehicle by being composed of two running surface end members and a triangular or trapezoidal flat plate-shaped joint plate that straddles between them and has a structure that moves in the transverse direction. You can ensure a perfect plane of the required width,
Not only can rubber tire vehicles run smoothly, but also vehicles supported by air floating pads can run with less air outflow loss, and can be fully applied to cases where there are large changes in gaps between foundation structures. Furthermore, by providing a flexible portion in the middle of the joint plate in the longitudinal direction of the passageway, the present invention can sufficiently follow the deflection of the foundation structure.
In the joint plate moving structure, if a structure in which the joint plate and the running surface end member are engaged by grooves and protrusions using a preloaded coil spring device, and a structure in which a moving force is applied using a spring are both implemented, The engagement structure allows reliable movement, and the spring device completely eliminates gaps between the ends of the joint plates.

[Brief explanation of drawings]

Fig. 1 is a partially cross-sectional perspective view showing a transportation device in which an expansion joint of the running surface of the present invention is implemented, Fig. 2 is a plan view of an embodiment of the first invention of the present application, and Fig. 3 is a longitudinal section thereof. 4 is a side view illustrating the deflection of a commonly known elevated girder, FIG. 5 is a plan view of an embodiment of the second invention of the present application, and FIG. 6 is a cross-sectional view thereof. 2... Air floating pad, 4... Rubber tire running wheel, 6, 26, 27... Running surface, 8, 9, 15,
16...Elevated girder, 11, 12, 17, 18, 3
4, 35, 40, 41... running surface end member, 1
3, 19, 36, 42...joint plate, 20, 47...
...Protrusions, 24, 25...Edges of running surface end members, 37...Coil springs.

Claims (1)

[Claims] 1. In a vehicle passageway where the two left and right running surfaces for the rubber tires or air floating pads that support the vehicle are flat, two foundation structures that face each other at a joint such as an elevated girder that is the foundation structure of the passageway. It consists of a running surface end member provided at the end of the running surface, and a joint plate provided across the two members, and the joint plate has an essentially triangular or trapezoidal planar shape with non-parallel end surfaces at both ends in the longitudinal direction of the passage. When the joint spacing of the basic structure increases, the joint plate moves in the cross-passage direction to fill the gap in the running surface caused by this, and when the joint spacing decreases, the joint plate moves. has a joint plate moving structure in which the running surface is pushed out in a direction across the course; The width of the joint plate in the cross-passage direction is the width of the joint plate when the joint interval of the foundation structure is at its minimum, even when the joint plate is moving in the cross-passage direction. The width includes the minimum width necessary to support passing vehicles even when the joint plates are moving in the cross-aisle direction, and the two joint plates are placed in symmetrical positions, with the joint plate An expansion joint for a running surface, characterized in that it is provided with a spring that provides a moving force to move it in the direction across the aisle.