Metal load-carrying platform for heavy snow area and snow cleaning method

Abstract

To provide a metal load-carrying platform which can efficiently remove snow ice, is simple, is excellent in durability and is inexpensive, and an efficient snow cleaning method using the metal load-carrying platform.SOLUTION: There is provided a metal load-carrying platform in which a fluororesin sheet is detachably fixed to a floor surface of the metal load-carrying platform. Preferably, the corner part of the metal load-carrying platform is coated with a joint member in which a fluororesin plate is joined to the surface of a metal plate, and the joint member has a joint region where a metal plate and a fluororesin plate are directly joined to each other.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a metal loading platform for heavy snowfall areas that is mounted on dump trucks or the like in heavy snowfall areas, and a snow removal method using said metal loading platform for heavy snowfall areas. [Background technology]

[0002] It takes a lot of time and effort to remove snow and ice that has accumulated on various loading platforms, and there is a need to make this work more efficient. In particular, in areas with heavy snowfall, snow removal is difficult because the loading platform and snow freeze, making manual thawing or melting with a snow melting machine necessary. In these circumstances, there is a strong need to establish a more efficient method of removing snow from the loading platforms of dump trucks and trucks.

[0003] In contrast, Patent Document 1 (JP 2019-94059 A) describes an exhaust lift device (1) provided on a dump truck (20) for heating or keeping warm a loading platform (22) by using exhaust gas from an engine. The device includes exhaust flow path members (2, 3, 4, 5) that form a flow path capable of guiding the exhaust gas that flows in to a position directly below a floor plate (22a) when the loading platform (22) is in a non-inclined state, and an annular groove ( has been proposed an exhaust lift device for a dump truck comprising: a receiver (5A) having an annular groove (5A3) for receiving the exhaust gas from the exhaust passage member (2, 3, 4, 5), an exhaust passage hole (6A) penetrating the floor plate (22a) for discharging the exhaust gas guided to the opening of the exhaust flow path member (2, 3, 4, 5) into the space of the loading platform (22), and a cylindrical body (6B) extending downward from the periphery of the exhaust passage hole (6A), wherein when the loading platform (22) is in a non-inclined state, the cylindrical body (6B) is placed within the annular groove (5A3) of the receiver (5A).

[0004] In the dump truck exhaust lift device of Patent Document 1, it is said that the heat of the exhaust is applied to the space in the loading platform 22, heating the loading platform 22, thereby melting the snow and preventing the cargo from freezing.

[0005] In addition, Patent Document 2 (JP Patent Publication No. 2009-291804) proposes a crane truck with a snow removal function, which has a jib crane mounted on the truck chassis, and a snow removal frame is installed on the loading platform so that it can slide back and forth, and the snow removal frame can be pulled and slid backward by the jib crane, allowing the loaded snow to be unloaded.

[0006] In the crane truck described in Patent Document 2, the snow loaded on the truck can be removed by pulling and sliding the snow removal frame on the loading platform backwards with a jib crane, which makes effective use of the crane truck.

[0007] In addition, in Patent Document 3 (JP 2022-49070 A), the inventors propose a loading platform for transporting soil and sand, characterized in that a fluororesin material is provided on the inner surface of a steel loading platform, the steel loading platform has a joint where the fluororesin material is directly bonded to the steel loading platform, and when the fluororesin material is peeled off from the steel loading platform at the joint, the fluororesin material extends in a fibrous form from the surface of the steel loading platform.

[0008] The loading platform for transporting soil and sand described in Patent Document 3 can efficiently suppress the adhesion of residual soil, even when compared with a loading platform having a steel plate floor structure, and can maintain this effect even when soil and sand are repeatedly transported. In addition, since the fluororesin material is directly bonded to the inner surface of the steel loading platform without using rivets, screws, etc., there is no weight increase due to the bonding. In addition, the fluororesin material can be made thin, and weight increase due to bonding of the fluororesin material can be suppressed. Furthermore, the fact that the inner surface of the steel loading platform and the fluororesin material are directly bonded means that the inner surface and the surface of the fluororesin material are in complete contact with each other, and even fine soil and sand will not penetrate between the steel loading platform and the fluororesin material. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2019-94059 A [Patent Document 2] Japanese Patent Application Publication No. 11-291804 [Patent Document 3] Patent Publication No. 2022-49070 Summary of the Invention [Problem to be solved by the invention]

[0010] However, the exhaust lift device for a dump truck described in Patent Document 1 has a complex mechanism, which increases the introduction and running costs. In addition, the device is likely to be damaged by cargo other than snow in summer, making it impractical. Furthermore, as the electrification of automobiles progresses, it will no longer be possible to utilize the engine exhaust, and the device itself will no longer be viable.

[0011] In addition, the crane truck described in Patent Document 2 requires the installation of a crane, which not only significantly increases the cost and weight of the vehicle, but also takes time to remove snow from the loading platform due to the crane operation. In addition, the truck is hardly effective in removing snow that has frozen onto the loading platform.

[0012] Furthermore, the loading platform for transporting soil and sand described in Patent Document 3 is primarily intended to prevent soil and sand from adhering, and it is unclear whether it is effective against snow and ice that accumulates in areas with heavy snowfall. In addition, in order to deal with the intrusion of soil and sand and wear caused by soil and sand, the fluororesin material provided on the inner surface of the steel loading platform is firmly and directly bonded to the steel loading platform, and there is a concern that if the fluororesin material is applied to the entire floor surface of the steel loading platform, the manufacturing costs will increase due to the increase in the number of bonds and bonding area.

[0013] In view of the problems in the conventional technology described above, an object of the present invention is to provide a simple, durable, and inexpensive metal loading platform that can efficiently remove snow and ice, and an efficient snow removal method using said metal loading platform. [Means for solving the problem]

[0014] In order to achieve the above-mentioned object, the inventors conducted extensive research into the structure of metal loading platforms and discovered that snow that has accumulated on the surface of a fluororesin material can be easily removed, and that the effect of this can be fully realized by providing appropriate fluororesin material in appropriate locations on the metal loading platform, thereby arriving at the present invention.

[0015] That is, the present invention provides: A fluororesin sheet is removably fixed to the floor surface of the metal loading platform; To provide a metal loading platform for use in heavy snowfall areas, characterized by:

[0016] In the metal loading platform for heavy snowfall areas of the present invention, the floor of the metal loading platform is covered with a fluororesin sheet, so snow can be removed more reliably and efficiently than when only the corners of the metal loading platform are covered with fluororesin plates. Furthermore, since the fluororesin sheet is removably fixed to the floor of the metal loading platform, if the fluororesin sheet deteriorates or is damaged, only the fluororesin sheet can be replaced. Furthermore, when earth and sand are loaded onto the metal loading platform, only the fluororesin sheet can be removed in order to reduce damage to the fluororesin sheet.

[0017] In the metal loading platform for use in heavy snowfall areas of the present invention, it is preferable that the corners of the metal loading platform are covered with a joining member having a fluororesin plate joined to the surface of a metal plate, and that the joining member has a joining area where the metal plate and the fluororesin plate are directly joined.

[0018] By covering the corners, which are the most difficult to remove snow from, with fluororesin plates, the freezing of snow on the loading platform is suppressed, and snow accumulated on the loading platform can be removed very efficiently. In addition, although it is difficult to place fluororesin, which is a material that is difficult to join, on the corners of a metal loading platform, by using a joining member in which a metal plate and a fluororesin plate are firmly joined, the corners of the metal loading platform can be simply and easily covered with fluororesin plates. Since the fluororesin plate placed on the corners has a joining area that is firmly and directly joined to the metal plate, it does not peel off even if snow removal work is repeated, and can be used for a long period of time without maintenance. The method of fixing the metal plate to the metal loading platform is not particularly limited as long as it does not impair the effects of the present invention, and various conventionally known methods for joining metal materials to metal materials can be used, for example, welding, mechanical fastening, etc.

[0019] Here, the "directly bonded joint area" does not refer to, for example, a joint area formed by adhesive or mechanical fastening, but rather refers to a state in which the surfaces of the fluororesin plate and the metal bed are in direct contact with each other to form a strong joint interface. Since no adhesive with poor environmental resistance is used, the metal bed for heavy snowfall areas of the present invention can be suitably used in cold regions and wet regions. Furthermore, in the metal bed for heavy snowfall areas of the present invention, the fastening force does not decrease over time as in mechanical fastening, and no gaps are generated between the fluororesin plate and the metal bed, so long-term reliability can be ensured.

[0020] In the metal loading platform for use in heavy snowfall regions of the present invention, it is preferable that the fluororesin plate has a plate thickness of 1.0 to 4.0 mm, and the fluororesin sheet has a sheet thickness of 0.5 to 5.0 mm.

[0021] By making the thickness of the fluororesin plate 1.0 mm or more, it is possible to suppress the deterioration of the slip resistance due to wear and friction of the fluororesin material during long-term use, and by making it 4.0 mm or less, it is possible to suppress the deterioration of the loading efficiency due to the decrease in volume and the increase in weight. The more preferable thickness of the fluororesin plate is 2.0 to 3.0 mm, and the most preferable thickness is 2.0 to 2.5 mm.

[0022] Also, by setting the sheet thickness of the fluororesin sheet to 0.5 mm or more, it is possible to suppress wear of the fluororesin material and a decrease in slip resistance due to friction during long-term use. By setting it to 5.0 mm or less, it is possible to suppress a decrease in loading efficiency due to a decrease in volume and an increase in weight. A more preferable sheet thickness of the fluororesin sheet is 1.0 to 3.0 mm, and the most preferable sheet thickness is 1.0 to 2.0 mm.

[0023] Also, in the metal loading platform for heavy snow areas of the present invention, it is preferable that the end portion of the fluororesin sheet is mechanically fastened to the front surface of the metal loading platform. Since the end portion of the fluororesin sheet is mechanically fastened to the front surface of the metal loading platform, when the fluororesin sheet is not required, the fluororesin sheet can be fixed to the front surface of the metal loading platform in a rolled state. Further, when the fluororesin sheet is required, the floor surface of the metal loading platform can be quickly and easily covered by simply spreading the rolled fluororesin sheet.

[0024] Also, in the metal loading platform for heavy snow areas of the present invention, it is preferable that the end portion of the fluororesin sheet is directly joined to a fixing metal plate, and the fixing metal plate is mechanically fastened to the front surface of the metal loading platform. Since the fixing metal material, which is a metal material, and the front surface of the metal loading platform can be easily joined, by preparing a fixing metal material in which the end portion of the fluororesin sheet is directly joined in advance, the degree of freedom in the design of the metal loading platform can be increased.

[0025] Also, in the metal loading platform for heavy snow areas of the present invention, it is preferable that the fluororesin sheet has through holes, and the fluororesin sheet is fixed to the floor surface of the metal loading platform by fastening a bolt inserted into the through holes and a magnet nut arranged on the floor surface of the metal loading platform. By using mechanical fastening with bolts and nuts, the fluororesin sheet can be easily detached. In addition, by using a magnet nut, fastening points can be provided at any location on the floor surface of the metal loading platform, and changes to the fastening points are also easy.

[0026] Furthermore, in the metal loading platform for use in heavy snowfall areas of the present invention, it is preferable that the bolts are fluororesin bolts. By using fluororesin bolts, adhesion between the bolts and snow and ice is suppressed, and the efficiency of snow removal can be more reliably guaranteed.

[0027] The present invention also provides a method for producing a semiconductor device comprising the steps of: Using the metal loading platform for heavy snowfall areas of the present invention, tilting the metal loading platform to remove accumulated snow from the metal loading platform; The present invention also provides a method for removing snow from a metal loading platform, comprising:

[0028] In the metal loading platform for heavy snowfall areas of the present invention, the corners are covered with fluororesin plates and the floor is covered with a fluororesin sheet, so that adhesion of snow and ice to the surface of the metal loading platform is effectively suppressed. Also, since the affinity between the surface of the metal loading platform and snow and ice is low, snow accumulated on the metal loading platform can be removed extremely efficiently by simply tilting the metal loading platform.

[0029] In addition, in the method for removing snow from a metal loading platform of the present invention, the inclination is preferably set to 30 to 50°. By setting the inclination to 30° or more, the loaded snow can be easily slid down. On the other hand, by setting the inclination to 50° or less, snow can be removed within the inclination limit of the loading platform of the dump truck. The inclination of the metal loading platform is more preferably set to 30 to 45°, and most preferably set to 40 to 45°. Effect of the Invention

[0030] The metal loading platform and snow removal method of the present invention for use in heavy snowfall areas make it possible to provide a simple, durable, inexpensive metal loading platform that can efficiently remove snow and ice, as well as an efficient snow removal method using said metal loading platform. [Brief description of the drawings]

[0031] [Figure 1] 1 is a schematic diagram showing an example of a metal loading platform for use in heavy snowfall regions according to the present invention. [Diagram 2]FIG. 2 is a schematic diagram showing an example of a state in which a fluororesin sheet is fixed to the floor surface of a metal loading platform. [Diagram 3] FIG. 1 is a schematic diagram showing an example of a fluororesin sheet rolled up on the front surface of a metal loading platform. [Figure 4] 1 is a schematic diagram showing an example of a state in which a fixing metal plate is fixed to the front surface of a metal loading platform with bolts. [Diagram 5] FIG. 1 is a schematic diagram showing an example of a situation in which a metal loading platform is tilted to remove accumulated snow and ice. [Figure 6] 1 is a photograph showing the appearance of a fixing metal plate fixed to the front surface of a metal loading platform in an embodiment. [Figure 7] 1 is a photograph showing the appearance of a fastening portion between a fluororesin sheet and a metal loading platform floor in an embodiment. [Figure 8] 1 is a photograph showing the appearance of a metal loading platform for use in heavy snowfall areas obtained in the embodiment. [Figure 9] 1 is a photograph showing the appearance of a truck and a loading platform used in a verification experiment of an embodiment. [Figure 10] This is a photograph showing the situation when snow starts to fall in the example (first time). [Figure 11] This is a photograph showing the situation when snow starts to fall in the example (second time). [Figure 12] This is a photograph showing the situation when snow starts to fall in the example (third time). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] Representative embodiments of the metal loading platform for heavy snowfall areas and the snow removal method of the present invention will be described in detail below with reference to the drawings, but the present invention is not limited to these. In the following description, the same or equivalent parts are given the same reference numerals, and duplicated descriptions may be omitted. In addition, since the drawings are intended to conceptually explain the present invention, the dimensions of each component shown and their ratios may differ from the actual ones.

[0033] (1) Metal loading platform for heavy snow areas Fig. 1 is a schematic diagram showing an example of a metal loading platform for use in regions with heavy snowfall according to the present invention. The metal loading platform for use in regions with heavy snowfall 2 shown in Fig. 1 is the loading platform of a dump truck, and the corners of the metal loading platform 4 are covered with joining members 6 to which fluororesin plates are joined. As a result, the surfaces of the corners are in a state in which the fluororesin plates are arranged. Since the corners of the metal loading platform 4 are substantially L-shaped, two joining members 6 may be directly joined to the floor and side surfaces of the corners, respectively, or the joining members 6 given a substantially L-shape may be directly joined.

[0034] In the joining member 6, the entire surface area of ​​the metal plate may be covered with a fluororesin plate, or only a part of the surface area may be covered with a fluororesin plate. When a fluororesin plate, which is a difficult-to-join material, is directly joined to the corners of a large metal loading platform 4, the joining process may become complicated. However, by manufacturing the joining member 6 in advance, it is possible to easily and efficiently attach the joining member 6 to the metal loading platform 4.

[0035] The joining member 6 has a joining region where the metal plate and the fluororesin plate are directly joined, and "joined directly" means that the surface of the metal plate and the surface of the fluororesin plate are directly and firmly joined, not by joining using an adhesive or mechanical fastening. For this joining, the joining method disclosed in JP 2022-49070 A can be suitably used. By directly joining the metal plate and the fluororesin plate, it is possible to suppress the decrease in environmental resistance caused by the use of an adhesive, the weight increase caused by the use of mechanical fastening, and the stress concentration at the fastening part.

[0036] The material of the metal loading platform 4 is not particularly limited as long as it does not impair the effects of the present invention, and various conventionally known metal materials used as loading platforms can be used. For example, various steel materials and aluminum alloy materials can be used as the material of the metal loading platform 4, but it is preferable to use steel material. By using the metal loading platform 4 made of steel material, the surface of the metal loading platform that has been subjected to an appropriate surface treatment using a laser can be firmly and directly bonded to the fluororesin plate. In addition, steel material is a general-purpose material that is easily available, and an inexpensive metal loading platform 2 for heavy snowfall areas can be obtained.

[0037] The width of the fluororesin plate covering the floor and sides at the corners of the metal loading platform 4 depends on the shape and size of the metal loading platform 4 and may be adjusted appropriately according to the desired snow removal performance, but is preferably 40 to 140 mm, more preferably 60 to 120 mm, and most preferably 80 to 100 mm. Covering the corners with a fluororesin plate 40 to 140 mm wide can sufficiently improve snow removal performance.

[0038] The thickness of the fluororesin plate is preferably 1.0 to 4.0 mm, more preferably 2.0 to 3.0 mm, and most preferably 2.0 to 2.5 mm. By making the thickness of the fluororesin plate 1.0 mm or more, it is possible to suppress the deterioration of the slip resistance due to wear and friction of the fluororesin material during long-term use, and by making the thickness 4.0 mm or less, it is possible to suppress the deterioration of the loading efficiency due to the reduction in volume and the increase in weight.

[0039] On the other hand, it is preferable that the entire periphery of the corners of the metal loading platform 4 be covered with a fluororesin plate. By covering the entire periphery of the corners, where it is difficult to remove snow and ice, with a fluororesin plate, it is possible to improve the snow removal efficiency over the entire area of ​​the metal loading platform 4. In addition, since the fluororesin plate is directly joined without using rivets, screws, etc., there is no weight increase due to joining.

[0040] In addition, a fluororesin sheet 8 is detachably fixed to the floor surface of the metal loading platform 4, which is the greatest feature of the metal loading platform 2 for heavy snowfall areas of the present invention. If a fluororesin plate is directly bonded to the floor surface of the metal loading platform 4, the required bonding area becomes large, and the manufacturing cost associated with the direct bonding becomes high. In addition, when heavy objects, soil, etc. are loaded onto the metal loading platform 4, the fluororesin plate is damaged over time, so it is desirable to be able to simply and easily remove the fluororesin material from the floor surface in consideration of continued use outside of winter. Here, from the viewpoint of snow removal characteristics, it is preferable that the fluororesin sheet 8 completely covers the floor surface of the metal loading platform 4. On the other hand, snow removal efficiency can be improved even if only a part of the floor surface is covered with the fluororesin sheet 8, and the shape and size of the fluororesin sheet 8 may be determined by considering the balance between snow removal efficiency and material costs.

[0041] The method for fixing the fluororesin sheet 8 to the floor surface of the metal loading platform 4 is not particularly limited as long as it does not impair the effects of the present invention, and various conventionally known methods can be used. For example, the fluororesin sheet 8 may be designed to be fixed to the floor surface by bolts and nuts, or an appropriate clamp mechanism may be provided on the floor surface to fix the fluororesin sheet 8 to the floor surface.

[0042] Here, a preferred method for fixing the fluororesin sheet 8 to the floor surface is to provide through holes in the fluororesin sheet 8 and fasten a bolt inserted into the through hole to a magnetic nut placed on the floor surface to fix the fluororesin sheet 8 to the floor surface. Mechanical fastening with a bolt and a nut allows the fluororesin sheet 8 to be easily attached and detached. In addition, the use of a magnetic nut allows a fastening point to be provided at any point on the floor surface of the metal loading platform 4, and the fastening point can be easily changed. FIG. 2 shows an example of the state in which the fluororesin sheet 8 is fixed to the floor surface of the metal loading platform 4 with a bolt 10 and a magnetic nut 12.

[0043] Moreover, it is preferable that the bolts 10 used to fasten the fluororesin sheet 8 to the floor surface are made of fluororesin. By using fluororesin bolts, adhesion of the bolts 10 to snow and ice is suppressed, and the efficiency of snow removal can be more reliably guaranteed.

[0044] It is also preferable that the ends of the fluororesin sheet 8 are mechanically fastened to the front surface of the metal loading platform 4. By mechanically fastening the ends of the fluororesin sheet 8 to the front surface of the metal loading platform 4, when the fluororesin sheet 8 is not required, the fluororesin sheet 8 can be fixed in a rolled-up state to the front surface of the metal loading platform 4. When the fluororesin sheet 8 is required, the floor surface of the metal loading platform 4 can be covered quickly and easily by simply unfolding the rolled-up fluororesin sheet 8. Figure 3 shows the fluororesin sheet 8 removed from the floor surface of the metal loading platform 4 and rolled up on the front surface of the metal loading platform 4.

[0045] 4 shows an example of a state in which a fixing metal plate 14 to which a fluororesin sheet 8 is directly bonded is fixed to the front surface of a metal loading platform 4 with bolts 10. It is more preferable that an end of the fluororesin sheet 8 is directly bonded to the fixing metal plate 14, and the fixing metal plate 14 is mechanically fastened to the front surface of the metal loading platform 4. When the end of the fluororesin sheet 8 is mechanically fastened directly to the front surface of the metal loading platform 4, there is a risk that the fluororesin sheet 8 may break due to stress concentration at the fastening portion, but this can be prevented by using a fixing metal plate 14 to which the end of the fluororesin sheet 8 is directly bonded.

[0046] The sheet thickness of the fluororesin sheet 8 is preferably 0.5 to 5.0 mm, more preferably 1.0 to 3.0 mm, and most preferably 1.0 to 2.0 mm. By making the sheet thickness of the fluororesin sheet 8 0.5 mm or more, it is possible to suppress the deterioration of the slip resistance due to wear and friction of the fluororesin material during long-term use, and by making the thickness 5.0 mm or less, it is possible to suppress the deterioration of the loading efficiency due to the reduction in volume and the increase in weight.

[0047] The material of the fluororesin plate and the fluororesin sheet 8 may be any of various conventionally known fluororesin materials. Examples of the fluororesin material include polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE, melting point), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-ethylene copolymer (ETFE), tetrafluoroethylene-perfluorodioxole copolymer (TFE / PDD), and chlorotrifluoroethylene-ethylene copolymer (ECTFE). Polytetrafluoroethylene (PTFE) is preferred. Among the fluororesin materials, polytetrafluoroethylene has poor reactivity, and the contact angle between water and the resin is large, so that adhesion of snow and ice can be more efficiently suppressed.

[0048] (2) How to remove snow from metal loading platforms The method for removing snow from a metal loading platform of the present invention is a method for simply and efficiently removing snow and ice from a metal loading platform for use in heavy snowfall areas of the present invention, without involving manual loosening work or melting snow using a snow melting machine.

[0049] In the snow removal method for a metal loading platform of the present invention, snow and ice accumulated on the metal loading platform 4 can be easily removed simply by tilting the metal loading platform 2 for heavy snowfall areas, as shown in Figure 5. Here, compared to a conventional metal loading platform in which the fluororesin plate and the fluororesin sheet 8 are not installed on the metal loading platform 4, snow slides off the metal loading platform 2 for heavy snowfall areas at a smaller tilt angle. In other words, the greatest feature of the snow removal method for a metal loading platform of the present invention is that the use of the metal loading platform 2 for heavy snowfall areas results in a smaller snow fall start angle.

[0050] In the method for removing snow from a metal loading platform of the present invention, it is preferable that the inclination angle of the metal loading platform 4 is 30 to 50°. By setting the inclination to 30° or more, the loaded snow can be easily slid off. On the other hand, by setting the inclination to 50° or less, snow can be removed within the inclination limit of the loading platform of the dump truck. It is more preferable that the inclination angle of the metal loading platform is 30 to 45°, and most preferably 40 to 45°.

[0051] Furthermore, at the corners of the metal loading platform 4, where it is particularly difficult to remove snow from the metal loading platform 4, a relatively thick fluororesin plate is firmly fixed to the surface of the metal loading platform 4, and is sufficiently durable to withstand repeated snow removal work. That is, in the snow removal method for a metal loading platform of the present invention, even if the fluororesin sheet 8 provided on the bottom surface of the metal loading platform 4 is damaged, the fluororesin plate installed at the corners of the metal loading platform 4 can promote snow removal.

[0052] On the other hand, when a fluororesin plate is provided on the bottom surface of the metal loading platform 4, the material cost of the fluororesin plate and the manufacturing cost for directly joining the fluororesin plate to the metal loading platform 4 are high, so a thinner fluororesin sheet 8 is detachably fixed to the bottom surface of the metal loading platform 4. In addition to the fact that the fluororesin sheet 8 is less expensive than a fluororesin plate, this configuration allows the fluororesin sheet 8 to be easily replaced, for example, if the fluororesin sheet 8 is damaged. In addition, when transporting cargo other than snow, the fluororesin sheet 8 can be rolled up at the front of the metal loading platform 4 to prevent it from being damaged.

[0053] Representative embodiments of the present invention have been described above, but the present invention is not limited to these, and various design modifications are possible, all of which are included in the technical scope of the present invention. EXAMPLES

[0054] [Metal loading platform for heavy snow areas] A metal plate was joined using a laser to which a fluororesin plate was directly bonded, around the entire periphery of the corners of the steel loading platform (metal loading platform) of a conventional snow removal dump truck. The inside width of the stainless steel loading platform is 2.2 m and its length is 5.1 m. A polytetrafluoroethylene (PTFE) plate was used for the fluororesin plate, and the PTFE plate was 90 mm wide and 1000 mm long. The metal plate used was SUH409L measuring 100 mm x 1000 mm x 1.0 mm.

[0055] The direct joining of the fluororesin plate and the metal plate was performed using an 8kW semiconductor laser (LDF-8000-40) manufactured by Laserline, with a zoom homogenizer in the optical system to create a 9mm x 100mm line laser, and the laser output was controlled so that the surface temperature irradiated by the laser was 440°C, after which the laser was scanned at a scanning speed of 8mm / s. A pressure of approximately 3MPa was applied to the interface to be joined. A small CO 2 The experiment was carried out using a / MAG automatic welding machine with AC200V / rated input 6.4kVA, output voltage 16-24V, maximum no-load voltage 32V, and with a welding current of 120A and 1.5 spots / second using 0.9mm wire.

[0056] Next, the end of the fluororesin sheet, measuring 1 mm x 1500 mm x 5500 mm, was directly bonded to the fixing metal plate, and the fixing metal plate was fixed to the front of the metal loading platform with three M16 bolts. Figure 6 shows the fixing metal plate fixed to the front of the metal loading platform. Polytetrafluoroethylene (PTFE) was used for the fluororesin sheet, and SHU409L, measuring 100 mm x 1500 mm x 1.5 mm, was used for the fixing metal plate. In addition, a 4 kW semiconductor laser (LDF-4000-40) manufactured by Laserline was used to bond the fluororesin sheet and the fixing metal plate, and a 57.2 mm x 5.4 mm line laser was used with a zoom homogenizer in the optical system. The laser output was controlled so that the laser irradiation surface temperature was 500°C, and the scanning speed was 1 mm / s. A pressure of approximately 0.5 MPa was applied to the interface to be bonded.

[0057] Also, using a magnetic nut and a fluororesin bolt, eight locations at both ends of the long side of the fluororesin sheet were fastened to the floor surface of the metal loading platform. Photographs of the front and back sides of the fastening part are shown in Fig. 7.

[0058] Fig. 8 shows a photograph of the appearance of the finally obtained metal loading platform for heavy snow areas of the present invention. It can be seen that the corners of the metal loading platform are covered with fluororesin plates, and the fluororesin sheet is detachably fixed to the floor surface of the metal loading platform. Here, in the areas (eight locations) surrounded by the broken lines, the fluororesin sheet and the floor surface of the metal loading platform are fastened.

[0059] [Snow removal method for metal loading platform] Using a truck equipped with the metal loading platform for heavy snow areas (fluororesin installed loading platform) shown in Fig. 8 and a truck equipped with a conventional general metal loading platform (fluororesin not installed loading platform) without a fluororesin plate and a fluororesin sheet, a snow removal verification experiment was conducted. Photographs of the appearance of the truck and the loading platform used in the verification experiment are shown in Fig. 9.

[0060] On January 30, 2022, in Higashitsuji-gun, Yamagata Prefecture, snow equivalent to five backhoe loads was loaded onto the loading platform, and after driving on the public road for 30 minutes, the snow was removed. The metal loading platform was tilted, and the tilt angle at which snowfall started was measured. The results of three measurements are as follows.

[0061] (First time) Time: 12:00, Weather: Clear, Temperature: -1°C. The snowfall start angle of the fluororesin installed loading platform was 17°, and the snowfall start angle of the fluororesin not installed loading platform was 55°. The situation at the start of snowfall is shown in Fig. 10.

[0062] (Second time) Time: 13:50, Weather: Cloudy, Temperature: -2°C. The snowfall start angle of the fluororesin installed loading platform was 30°, and the snowfall start angle of the fluororesin not installed loading platform was 55°. The situation at the start of snowfall is shown in Fig. 11.

[0063] (Third time) Time: 14:50, weather: snow, temperature: -2°C, the angle at which the snow started to fall on the fluororesin-equipped platform was 35°, and the angle at which the snow started to fall on the platform without fluororesin was 55°. Figure 12 shows the situation when the snow started to fall.

[0064] From the above results, it can be seen that the angle at which snow began to fall off the platform with fluororesin was significantly smaller in all cases compared to the platform without fluororesin. In addition, no snow adhesion to the platform with fluororesin or damage from the fluororesin material joints was observed. [Explanation of symbols]

[0065] 2. Metal loading platform for heavy snow areas, 4...metal loading platform, 6... Joining members, 8. Fluorine resin sheet, 10··· volts, 12...Magnet nut, 14...Fixing metal plate.

Claims

1. A fluororesin sheet is removably fixed to the floor of the metal loading platform. A metal loading platform for use in areas with heavy snowfall.

2. The corners of the metal platform are covered with a joining member having a fluororesin plate joined to the surface of a metal plate, the joining member has a joining region where the metal plate and the fluororesin plate are directly joined; 2. The metal loading platform for use in regions subject to heavy snowfall according to claim 1.

3. The thickness of the fluororesin plate is 1.0 to 4.0 mm; The sheet thickness of the fluororesin sheet is 0.5 to 5.0 mm; 3. The metal loading platform for use in regions subject to heavy snowfall according to claim 2.

4. The end of the fluororesin sheet is mechanically fastened to the front surface of the metal loading platform; 3. A metal loading platform for use in regions subject to heavy snowfall according to claim 1 or 2.

5. The end of the fluororesin sheet is directly bonded to a fixing metal plate, the fixing metal plate is mechanically fastened to the front surface of the metal carrier; 3. A metal loading platform for use in regions subject to heavy snowfall according to claim 1 or 2.

6. The fluororesin sheet has through holes, the fluororesin sheet is fixed to the floor surface of the metal loading platform by fastening a bolt inserted into the through hole to a magnet nut disposed on the floor surface of the metal loading platform; 3. A metal loading platform for use in regions subject to heavy snowfall according to claim 1 or 2.

7. The bolt is a fluororesin bolt; 7. The metal loading platform for use in regions subject to heavy snowfall according to claim 6.

8. Using the metal loading platform for heavy snowfall areas according to claim 1 or 2, tilting the metal loading platform to remove accumulated snow from the metal loading platform; A method for removing snow from a metal loading platform, comprising:

9. The inclination is 30 to 50 degrees; 9. A method for removing snow from a metal loading platform according to claim 8.

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