Vehicle passage structure

Abstract

To propose various types of vehicle passage structures such as a vehicle tire mud removal device or a vehicle gangway footplate device capable of suppressing generation of rust in a tire contact part and prolonging a repair interval.SOLUTION: Provided is a vehicle passage structure made of steel and having a tire contact part formed of a stainless steel material. The tire contact part can have a shape orthogonal to a vehicle travel direction. The stainless steel material can be a stainless steel member, a stainless steel round rod, or a stainless steel overlay welding bead.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to the technology of the tire contact part in a steel vehicle passing structure.

Background Art

[0002] There are various steel vehicle passing structures through which vehicles pass, such as vehicle tire mud removal devices and vehicle crossing plate devices.

[0003] For example, there is known a vehicle tire mud removal device that drops the mud adhering to the tires of a vehicle when the vehicle travels (Patent Document 1).

[0004] The mud removal device described in Patent Document 1 has a plurality of convex members continuous with the surface on which the vehicle tire rolls. The plurality of convex members are arranged at intervals in the longitudinal direction of the support plate. The plurality of convex members are arranged parallel to each other, and the intervals between adjacent convex members are substantially equal. The vehicle moves forward when the tire contacts and rolls on the upper end of the convex member.

[0005] The vehicle tire mud removal device of Patent Document 1 has a simple structure, but has a mud removal effect that when the tire of the vehicle passes over the convex member, an impact is applied due to the up and down movement, and the mud adhering to the tire is peeled off and falls.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] The vehicle passing structure is generally a steel structure, and painting and plating for rust prevention purposes are applied to the whole. However, the part in contact with the tire such as the convex member in the mud removal device described in Patent Document 1 is in a very severe state where it not only supports a large tire load but is also scraped by the mud adhering to the tire. Therefore, the painting and plating on the surface of the convex member, which is the tire contact part, are easily peeled off. In addition, the vehicle support structure is also exposed to wind and rain. Therefore, rust easily occurs on the steel convex member.

[0008] In that case, repair work such as rust removal of the convex member and then repainting or replating is frequently required. This repair work requires a large amount of man-hours and costs.

[0009] The present invention proposes a vehicle passing structure capable of suppressing the generation of rust in the tire contact part due to vehicle passage.

Means for Solving the Problems

[0010] The vehicle passing structure according to the first invention is a steel vehicle passing structure, characterized in that the tire contact part is made of a stainless steel material.

[0011] Since the tire contact part of the vehicle passing structure according to the first invention is made of a stainless steel material, it will not rust even if the paint or plating peels off.

[0012] The vehicle passing structure according to the second invention is characterized in that the tire contact part has a shape perpendicular to the vehicle traveling direction.

[0013] By making the tire contact part of the vehicle passing structure according to the second invention have a shape perpendicular to the vehicle traveling direction, the left - right width of the tire contact part can be increased.

[0014] The vehicle passing structure according to the third invention is characterized in that the stainless steel material is a stainless steel.

[0015] The vehicle passage structure according to the third invention can be configured by selecting and using stainless steel materials of various shapes and materials according to the structure of the tire contact portion.

[0016] The vehicle passage structure according to the fourth invention is characterized in that the stainless steel material is a stainless steel round bar.

[0017] The vehicle passage structure according to the fourth invention can configure a tire contact portion by arranging stainless steel round bars that are easily available perpendicular to the vehicle traveling direction.

[0018] The vehicle passage structure according to the fifth invention is characterized in that the stainless steel material is a stainless steel build-up welding bead.

[0019] The vehicle passage structure according to the fifth invention can configure a tire contact portion made of stainless steel material at low cost by forming a stainless steel build-up welding bead.

[0020] The vehicle passage structure according to the sixth invention is a steel vehicle passage structure provided with a vehicle passage portion in which long tire support members having a convex shape with a uniform cross-section facing upward are arranged in parallel at equal intervals in the vehicle traveling direction, and the tire contact portion at the upper tip of the tire support member is made of stainless steel material.

[0021] The vehicle passage structure according to the sixth invention can configure the tire contact portion of a steel vehicle passage structure provided with a vehicle passage portion in which long tire support members having a convex shape with a uniform cross-section facing upward are arranged in parallel at equal intervals in the vehicle traveling direction with stainless steel material.

[0022] The vehicle passage structure according to the seventh invention is characterized in that a chamfered surface is provided at the convex tip of the tire support member, and the stainless steel build-up welding bead is provided on the chamfered surface.

[0023] The vehicle passing structure according to the seventh invention is provided with a chamfered surface at the convex tip of the tire support member, so that a stainless steel build-up bead can be stably welded to the chamfered surface.

Effect of the Invention

[0024] According to the vehicle passing structure of the present invention, even if the painting and plating of the tire contact portion are peeled off due to the passage of the vehicle, the generation of rust can be suppressed, so that the maintenance interval of the vehicle passing structure can be extended. Thereby, the time and cost required for the maintenance of the vehicle passing structure can be reduced.

Brief Description of the Drawings

[0025]

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Mode for Carrying Out the Invention

[0026] (First Embodiment) FIG. 1 shows a vehicle tire mud removal device 1 placed on the ground 3 and its bridge plate device 2 as a vehicle passing structure according to the first embodiment. The bridge plate device 2 is connected to the front end portion 8 and the rear end portion 7 of the mud removal device 1 so that the vehicle can get on and off the mud removal device 1. Hereinafter, when explaining the directions in the figure, it shall follow the arrows in the figure. In addition, as vehicle passing structures, there are various steel structures having tire contact portions such as bridge structures and grating structures, but the present invention can be applied to any vehicle passing structure.

[0027] FIG. 2 is a view taken along arrow A in FIG. 1, and is a view of the vehicle tire mud removal device 1 and its bridge plate device 2 according to the first embodiment as seen from above. In the vehicle tire mud removal device 1, a pair of vehicle passing portions 4 are arranged in parallel at intervals within a frame body 5. The vehicle passing portions 4 are rectangular in shape that is long in the front-rear direction as seen from above. In the vehicle passing portions 4, long tire support members 6 are arranged in parallel at equal intervals in the vehicle traveling direction.

[0028] A pair of bridging plate devices 2 are connected to the rear end portion 7 of the frame body 5 of the vehicle tire mud removal device 1. Similarly, a pair of bridging plate devices 2 are connected to the front end portion 8 of the frame body 5 of the vehicle tire mud removal device 1. In each of the bridging plate devices 2, long tire support members 10 extending in the left-right direction are arranged in parallel at equal intervals in the vehicle traveling direction.

[0029] FIG. 3 is a cross-sectional detailed view taken along the line B-B of FIG. 2, and is a view for explaining the details of the tire support member 6 constituting the vehicle passing portion 4 of the mud removal device 1. Further, FIG. 4 is a perspective detailed view of the tire support member 6 shown in FIG. 3. As shown in FIGS. 3 and 4, a steel equilateral angle steel (angle material) is used for the tire support member 6. The tire support member 6 is arranged with its apex of the equilateral angle facing upward and its both leg portions are disposed on the upper surface of the connecting support member 11 and welded and connected. A steel section steel is also used for the connecting support member 11, and it has a length extending over the entire length before and after the vehicle passing portion 4 (see FIG. 2).

[0030] As shown in FIG. 3, the tire support members 6 are arranged in parallel at equal intervals in the front-rear direction. As shown in FIGS. 3 and 4, a stainless steel round bar 12 is welded along the longitudinal direction of the tire support member at the upper tip of the tire support member 6. The stainless steel round bar 12 has a length slightly shorter than the left-right total length of the tire support member 6.

[0031] FIG. 5 is a detailed view taken along the arrow C of FIG. 2, and is a view of the bridging plate device 2 seen from the side. The bridging plate device 2 connects between the upper surface of the vehicle tire mud removal device 1 and the ground 3. The bridging plate device 2 includes a bridging plate main body 13. As shown in FIG. 5, the bridging plate main body 13 has two square pipes 14 arranged in parallel and separated from each other in the left-right direction over the entire length before and after. A plurality of tire support members 10 are arranged in parallel and at equal intervals on the upper surface of the square pipe 14. Note that the bridging plate device 2 according to the present embodiment has a grounding plate 17 rotatably connected to the ground side end portion of the bridging plate main body 13 by a connecting pin 18.

[0032] The boarding plate body 13 is configured as a rectangle as a whole in plan view (see Fig. 2). As shown in Fig. 5, an equilateral angle steel (angle material) is used for the tire support member 10 of the boarding plate device 2. The tire support member 10 has its both leg portions arranged on the upper surface of the square pipe 14 with the apex of the equilateral angle facing upward. The length of the tire support member 10 in the left - right direction is the same as the length of the boarding plate device 2 in the left - right direction. The contact portion between the tire support member 10 and the square pipe 14 is welded.

[0033] In this embodiment, an example of configuring the boarding plate body 13 by combining the square pipe 14, the tire support member 10, etc. in a lattice shape will be described. Such a lattice - shaped boarding plate body 13 has the characteristics that the tires of the vehicles passing through its upper surface are less likely to slip. It also has the characteristic that soil, small stones, etc. attached to the tires are less likely to remain on the boarding plate body 13.

[0034] The boarding plate body 13 according to the present embodiment shown in Figs. 2 and 5 has a stainless - steel round bar 15 with the same length as the longitudinal length of the tire support member 10 welded to the top above the tire support member 10. That is, it has substantially the same configuration as the tire support member 6 of the mud - removing device 1 described with reference to Fig. 4. The boarding plate device 2 is provided with engaging means 16 for engaging the boarding plate body 13 with the front - end portion 8 of the frame body 5 of the vehicle tire mud - removing device 1. Note that in the boarding plate device 2 according to the present embodiment, a tire support member 10 having a stainless - steel round bar 15 is also installed on the grounding plate 17.

[0035] Regarding the vehicle tire mud - removing device 1 as a vehicle - passing structure and its boarding plate device 2 according to the first embodiment described above, their operations and effects will be described below. Fig. 6 shows a state where a vehicle 20 (dump truck) is passing over the vehicle tire mud - removing device 1 and its boarding plate device 2 according to the first embodiment. The front - wheel tire 21 of the vehicle 20 is passing over the boarding plate device 2. The rear - wheel tire 22 of the vehicle 20 is passing over the vehicle tire mud - removing device 1.

[0036] FIG. 7 is a detailed view of part D in FIG. 6, and is a diagram for explaining the contact state between the rear wheel tire 22 during passage and the tire contact portion of the vehicle tire mud removal device 1. As shown in FIG. 7, the rear wheel tire 22 contacts the stainless steel round bar 12. However, the rear wheel tire 22 does not contact the steel tire support member 6 made of equilateral angle steel. Therefore, the paint or plating on the surface of the tire support member 6 (equilateral angle steel) does not peel off. The surface of the stainless steel round bar 12 may be scraped by the rear wheel tire 22, but rust does not occur.

[0037] As is known, stainless steel, which is an alloy of iron and chromium, forms a very thin chromium oxide film on its surface, and this film exhibits the effect of preventing corrosion. Even if the surface is scratched, it immediately reacts with oxygen in the air, and a new film is regenerated. Therefore, since the generation of rust is suppressed in the vehicle tire mud removal device 1 according to the first embodiment, the maintenance frequency is reduced. Therefore, the man-hours and costs required for the maintenance of the vehicle tire mud removal device 1 can be reduced.

[0038] Part E in FIG. 6 shows the tire contact portion between the front wheel tire 21 during passage and the tire support member 10 (see FIG. 5) of the crossing plate device 2. The contact state is the same as the relationship between the rear wheel tire 22 and the tire support member 6 of the vehicle tire mud removal device 1 described above. Similar to the vehicle tire mud removal device 1, the repair frequency of the crossing plate device 2 according to the first embodiment is reduced. Therefore, the man-hours and costs required for the maintenance of the crossing plate device 2 can be reduced.

[0039] (Second Embodiment) FIG. 8 is a perspective detailed view of the tire support member 30 of the vehicle tire mud removal device 31 according to the second embodiment. An equilateral angle steel (angle material) is used for the tire support member 30. The tire support member 30 has its apex of the equilateral angle facing upward, and both of its legs are arranged on the upper surface of the support member 32 and are welded and connected. Since the configurations of the other vehicle tire mud removal devices 31 are the same as those in the first embodiment, detailed descriptions thereof are omitted.

[0040] As shown in FIG. 8, a chamfered surface 33 is formed at the apex of an equilateral angle steel (angle material) which is the tire support member 30. And, stainless steel build-up welding beads 34 are built up on the surface of the chamfered surface 33, leaving both left and right end portions of the tire support member 30. When the chamfered surface 33 is formed at the apex of the equilateral angle steel (angle material) in this way, the welding operation for building up the stainless steel build-up welding beads 34 becomes easy.

[0041] FIG. 9 is a photograph of the manufacturing process of an equilateral angle steel (angle material) which is the tire support member 30 on which the stainless steel build-up welding beads 34 are built up. As shown in FIG. 9, the chamfered surface 33 may be provided only in the range where the tire may pass, and the stainless steel build-up welding beads 34 may be built up only on the chamfered portion.

[0042] The effect of the vehicle tire mud shedding device 31 as the passing vehicle support structure according to the second embodiment is the same as that of the vehicle tire mud shedding device 1 in the first embodiment described with reference to FIG. 7. The tire 22 contacts the stainless steel build-up welding beads 34. However, the tire 22 does not contact the tire support member 30 made of equilateral angle steel. Therefore, the paint or plating on the surface of the tire support member 30 (equilateral angle steel) does not peel off. Even if the surface of the stainless steel build-up welding beads 34 is slightly worn by the tire 22, rust does not occur.

[0043] <x Therefore, the repair frequency of the vehicle tire mud shedding device 31 according to the second embodiment can be reduced. Therefore, the man-hours and cost required for the maintenance of the vehicle tire mud shedding device 31 can be reduced.

[0044] FIG. 10 is a photograph of a crossover plate device 35 in which a tire contact portion is configured using stainless steel build-up welding beads. Also, FIG. 11 is an enlarged photograph of the stainless steel build-up welding beads 37 formed on the tire support member 36 of the crossover plate device 35. By adopting the same configuration in the crossover plate device 35, the same effect can be obtained.

[0045] (Third Embodiment) FIG. 12 is a photograph of the vehicle tire mud removal device 40 according to the third embodiment. The vehicle tire mud removal device 40 according to the third embodiment includes a cleaning function plate 42 that is swingably supported by bearing structures 43 disposed at both left and right ends of a tire support member 41.

[0046] The cleaning function plate 42 includes a ladle function portion 44 having a length substantially the same as the length in the left-right direction of an equilateral angle steel (angle material) constituting the tire support member 41, and a tire hanging portion 45. The ladle function portion 44 is a rectangular steel plate bent so that the front and rear centers are concave. Reinforcing bars are used for the tire hanging portion 45. The ladle function portion 44 and the tire hanging portion 45 are disposed before and after the tire support member 41, and both left and right ends thereof are welded and connected to a pair of left and right arms 46. Intermediate portions of the left and right arms 46 are respectively pivotally supported by the bearing structures 43.

[0047] As shown in the photograph of FIG. 12, stainless steel plates 47 that are long in the left and right directions and short in the front and rear widths are welded to the ends of the steel plate of the ladle function portion 44. A stainless steel round bar 48 having a length substantially the same as that of the stainless steel plate 47 is welded to the upper apex of the equilateral angle steel (angle material) constituting the tire support member 41.

[0048] FIG. 13 is a diagram for explaining the operation and effects of the vehicle tire mud removal device 40 according to the third embodiment. The vehicle tire mud removal device 40 according to the third embodiment is used in a state where a vehicle passage portion 50 is immersed in water 51 in a water tank. The vehicle tire 52 travels while stepping on the stainless steel round bar 48 of the tire support member 41. At this time, when the vehicle tire 52 steps on the tire hanging portion 45 of the cleaning function plate 42, the cleaning function plate 42 swings and the ladle function portion 44 splashes water on the vehicle tire 52. Thereby, the mud adhering to the vehicle tire 52 is more effectively removed.

[0049] When the vehicle is moving, the stainless steel plate 47 at the rear end of the ladle functional part 44 comes into contact with the vehicle tire 52. However, the steel plate part of the ladle functional part 44 does not come into contact with the vehicle tire 52. Therefore, the paint or plating on the steel plate part of the ladle functional part 44 does not peel off. Thus, the present invention can also be applied to the tire contact part that swings and contacts the tire when the vehicle tire 52 passes. Even in that case, the repair frequency of the vehicle mud removal device 40 according to the third embodiment can be reduced. Thereby, the man-hours and costs required for the maintenance of the mud removal device 40 can be reduced.

[0050] FIG. 14 is a photograph of the cleaning function plate 42 when a stainless steel build-up welding bead 53 is formed on the ladle functional part 44 instead of the stainless steel plate 47 in the vehicle tire mud removal device 40 according to the third embodiment. By using the stainless steel build-up welding bead 53, the tire contact part can be configured at a lower cost.

[0051] As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited to these embodiments. Additions, omissions, substitutions, and other changes to the configuration are possible without departing from the spirit of the present invention. The present invention is not limited by the above description, but is defined by the appended claims.

Explanation of Reference Numerals

[0052] 1: Vehicle tire mud removal device (vehicle passing structure) 2: Crossing plate device (vehicle passing structure) 6: Tire support member 10: Tire support member 12: Stainless steel round bar 15: Stainless steel round bar 30: Tire support member 31: Vehicle tire mud removal device (vehicle passing structure) 33: Chamfered surface 34: Stainless steel build-up welding bead 40: Vehicle tire mud removal device (vehicle passing structure) 41: Tire support member 47: Stainless steel plate (stainless steel material) 48: Stainless steel round bar 53: Stainless steel build-up welding bead

Claims

Claim 1 A vehicle passage structure made of steel, characterized in that the tire contact portion is made of a stainless steel material. Claim 2 The vehicle passage structure according to claim 1, wherein the tire contact portion has a shape perpendicular to the vehicle traveling direction. Claim 3 The vehicle passage structure according to claim 2, wherein the stainless steel material is a stainless steel material. Claim 4 The vehicle passage structure according to claim 3, wherein the stainless steel material is a stainless steel round bar. Claim 5 The vehicle passage structure according to claim 2, wherein the stainless steel material is a stainless steel build-up welding bead. Claim 6 A steel vehicle passage structure provided with a vehicle passage portion in which long tire support members having a convex shape with a uniform cross section facing upward are arranged in parallel at equal intervals in the vehicle traveling direction, characterized in that the tire contact portion at the upper tip of the tire support member is made of a stainless steel material. Claim 7 The vehicle passage structure according to claim 6, characterized in that the convex tip of the tire support member is provided with a chamfered surface, and the chamfered surface has a stainless steel build-up welding bead.

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