Arrangement structure and construction method of bus floor leather

Abstract

The invention belongs to the technical field of floor leather for public buses, and discloses an arrangement structure and a construction method of bus floor leather, the arrangement structure comprises an overall wide bottom floor leather which is laid on a floor without a wheel cover and a chassis; the facade floor leather is laid on the facades of the wheel cover and the side wall; an internal corner connecting node is arranged at the internal corner of the floor and the side wall or the wheel cover, and the floor leather on the bottom surface of the internal corner connecting node is integrally turned upwards by a set height; a fillet filler strip is mounted at the bottom of the internal corner, and the fillet filler strip is provided with two mounting surfaces perpendicular to each other and a concave arc transition surface; the bottom surface plastic flooring is adhered to the floor, the side wall or the wheel cover and the arc transition surface; arc-shaped grooves are formed in the connecting positions of the front vertical face, the rear vertical face and the side vertical faces of the wheel cover, and a plurality of V-shaped grooves are further formed in the front vertical face, the rear vertical face and the side vertical faces of the wheel cover. Butt seams are prevented from being generated at the bottom of the internal corner, and then water inlet points and bumps are prevented from being generated at the bottom of the internal corner; the service life of the public bus is ensured and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bus floor covering, and particularly relates to a bus floor covering arrangement structure and a construction method. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] In the production process of modern buses, the laying of the floor covering, i.e., the floor covering, is one of the key interior decoration processes, and the quality thereof is directly related to the visual aesthetics of the whole vehicle, the comfort of passengers, and even the service life and maintenance cost of the vehicle.

[0004] At present, the floor covering laying method commonly used in the industry is to spray solvent-based adhesive on the floor on site, and then bond and fix the floor covering. The solvent-based adhesive relied on by this method has a high content of organic solvents. During the spraying and subsequent curing process, a large amount of toxic and harmful organic solvents containing benzene, toluene, xylene and other substances will be volatilized into the air in the closed vehicle cabin, producing an extremely pungent odor. This not only creates an extremely poor working environment, seriously endangers the respiratory health of the workers, and has a potential risk of causing cancer, but also brings fire safety hazards due to the emission of volatile organic compounds, and damages the atmospheric environment and the ozone layer. After the vehicle is delivered, the residual organic solvents in the solvent adhesive will continue to be released slowly, becoming one of the main sources of volatile organic compounds (VOC) in the vehicle, directly affecting the air quality in the vehicle and posing a long-term threat to the health of passengers.

[0005] In addition to environmental and health concerns, existing floor covering installation processes also have significant structural reliability defects. Currently, floor coverings commonly have multiple seams in the passenger area. Particularly prominent are the internal corners formed by the floor and side panels, and the floor and wheel arch edging. To prevent bulging due to stress concentration at these corners, the traditional method is to cut and butt the flat and vertical floor coverings together at these points, and then weld them using floor covering welding rods. While this "butt-and-weld" process alleviates the bulging problem to some extent, it introduces a more fatal hidden danger—the internal corner seams. During long-term operation, vehicles continuously endure various loads such as vibration, impact, temperature fluctuations, and passenger foot traffic. Under these complex conditions, the welds at the internal corners are highly susceptible to failures such as "incomplete welds" and "open welds." Once the weld seal fails, water accumulated during vehicle washing, rainwater brought in by passengers, or moisture condensed from humid air will seep into the underlying floor covering through the seams. Since the corners are areas where moisture naturally collects and lingers, the seeping moisture is difficult to evaporate and will corrode the metal floor below over a long period of time, causing the floor to rust and perforate, severely shortening the service life of the bus and resulting in high subsequent maintenance costs.

[0006] To address the issue of solvent contamination, existing technology discloses an "adhesive-coated flooring veneer" in which a hot-melt pressure-sensitive adhesive coating is pre-applied to the back of the veneer body, and a release film layer is covered on the adhesive layer. This technical solution achieves "peel and apply" on-site by completing the pre-application of adhesive in the factory, avoiding on-site spraying of solvent adhesive, thereby effectively reducing the volatilization of harmful solvents during the production process.

[0007] However, the above solutions mainly focus on innovation in adhesive formulations and do not fundamentally optimize the structural connection method of the floor covering itself in complex parts of the vehicle body (especially inside corners and wheel arches). It still cannot solve the aforementioned problem of water ingress and corrosion at inside corner joints, nor the risk of bulging caused by stress concentration due to bending at inside corners. Summary of the Invention

[0008] In view of this, the purpose of the present invention is to provide an arrangement structure and construction method for bus floor coverings, which can solve the technical problem in the prior art that the joints of the floor coverings at the inside corners are prone to failure, which can easily lead to water ingress into the joints of the floor coverings.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: The first aspect provides a layout structure for bus flooring, including a bottom flooring of overall width laid on the floor excluding wheel arches and underframes; and a vertical flooring laid on the vertical surfaces of the wheel arches and side walls. An inside corner connection node is set at the inside corner of the floor and the side panel or wheel cover. The bottom surface of the inside corner connection node is turned up to a certain height. A rounded corner pad is installed at the bottom of the inside corner. The rounded corner pad has two mutually perpendicular mounting surfaces and a concave arc transition surface. The bottom linoleum is bonded to the floor, side panels or wheel covers, and rounded transition surfaces; The bottom flooring has an arc-shaped groove at the connection between the front and rear facades and the side facades of the wheel cover, and multiple V-shaped grooves are also made on the front and rear facades and the side facades of the wheel cover.

[0010] Preferably, the rounded corner pads are made of PVC or rubber, which combines structural strength and flexibility.

[0011] Preferably, the height range of the bottom floor linoleum turned up is 90-120mm, with the optimal height being 100mm.

[0012] Preferably, the arc groove is cut using an arc groove tooling, which includes an arc panel with two cutting edges on both sides and a handle welded to the outer side of the arc panel.

[0013] Preferably, the V-groove is cut using a V-groove tooling; the V-groove tooling includes a trapezoidal plate with two V-grooves symmetrically opened on the trapezoidal plate, and a horizontal plate is connected to the two V-grooves at their opposite outward ends.

[0014] Preferably, the corner joints are pressed flat using a corner roller when laying the linoleum.

[0015] Preferably, the joint between the bottom flooring and the upper flooring is located on the upper surface of the side panel and wheel cover, and a butt weld is applied at the joint.

[0016] Secondly, a construction method for the above-mentioned bus flooring arrangement structure is provided, the specific steps of which include: Cut the floor veneer into pieces and clean the back of the veneer before applying hot melt adhesive. Fix rounded corner pads at the inside corners of the floor and the side panels or wheel covers; lay the bottom floor linoleum, and turn it up at the inside corners to set the height, then press it flat with inside corner wheels; use arc groove tools and V-groove tools to trim the bottom floor linoleum on the front and rear facades and side facades of the wheel covers; When laying the floor linoleum, use round welding rods to weld the joints of the linoleum, and then smooth it after cooling.

[0017] Preferably, the hot melt adhesive peel strength is 30N / 2.5cm.

[0018] Preferably, the hot melt adhesive is an EVA-based hot melt pressure-sensitive adhesive, the coating temperature is 170-200°C, and the coating speed is 5-10 m / min.

[0019] Compared with the prior art, the advantages and positive effects of this invention are: The floor covering of this invention features a corner connection node at the inside corner where the flooring meets the side wheel arch. The floor covering at this connection node continuously curves upwards, and a rounded corner pad is installed at the bottom of the inside corner. This avoids seams at the bottom of the inside corner, preventing water ingress points and bulges. This ensures the service life of the bus and reduces maintenance costs. Furthermore, this invention includes arc-shaped grooves at the connection points between the front and rear facades and the side facades of the wheel arch, as well as multiple V-shaped grooves on these surfaces. This not only allows the floor covering to conform to the contours of the wheel arch but also disperses concentrated stress, maintaining adhesive stability. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] Figure 1 This is a top view of the arrangement structure of a bus floor covering according to Embodiment 1 or 2 of the present invention; Figure 2 This is a front view of the arrangement structure of a bus floor covering according to Embodiment 1 or 2 of the present invention; Figure 3 This is a schematic diagram of the floor and side wall inside corner upturned node in Embodiment 1 or 2 of the present invention; Figure 4 This is a schematic diagram of the arc-shaped groove arrangement in Embodiment 1 or 2 of the present invention; Figure 5 This is a front view of the arc-shaped groove tooling of Embodiment 1 or 2 of the present invention; Figure 6 This is a side view of the arc-shaped groove tooling of Embodiment 1 or 2 of the present invention; Figure 7 This is a front view of the V-groove tooling of Embodiment 1 or 2 of the present invention; Figure 8 This is a front view of the concave corner wheel in Embodiment 1 or 2 of the present invention; Figure 9 This is a side view of the concave corner wheel in Embodiment 1 or 2 of the present invention; In the picture: 1. Bottom flooring; 2. Wheel cover; 3. Base frame; 4. Floor; 5. Side panel; 6. Rounded corner pad; 7. Arc groove; 8. V-groove; 9. Arc groove fixture; 10. V-groove fixture; 11. Corner wheel; 12. Butt weld; 13. Vertical flooring. Detailed Implementation

[0022] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0023] The present invention will now be described in detail with reference to the accompanying drawings.

[0024] Example 1 This embodiment discloses a layout structure for bus floor coverings, which is applied to the floor, side panels, and wheel arches of a bus. Figure 1 , Figure 2 As shown, the flooring includes a single, wide base layer 1, which is laid entirely on the flooring 4 excluding the wheel covers 2 and the base frame 3. This single-width installation method reduces the number of seams on the surface compared to traditional butt joint methods. Traditional flooring installation involves cutting the flooring into multiple pieces, resulting in numerous seams on the surface. These seams are potential points of water ingress and weld failure risks. Reducing their number directly lowers the probability of repairs due to seam issues and improves the overall flatness and aesthetics of the flooring. The vertical flooring 13 is laid on the vertical surfaces of the side panels and wheel covers, and it is butt-jointed with the base layer 1.

[0025] In this embodiment, the bottom flooring 1 and the vertical flooring 13 can be commercial-grade PVC flooring with a multi-layer composite structure, the surface of which is a wear-resistant layer, the middle layer is a dimension-stabilizing layer with glass fiber reinforcement mesh, and the bottom layer is a non-woven fabric layer for bonding.

[0026] like Figure 1 , Figure 2 , Figure 3 As shown, the bottom floor veneer 1 has a corner connection node at the inside corner of the floor 4 and the side wall 5 or the floor 4 and the wheel cover 2. In this embodiment, the inside corner specifically refers to the point where the floor 4 and the side wall 5 intersect perpendicularly, and the point where the floor 4 and the side or front and rear facades of the wheel cover 2 intersect perpendicularly. This embodiment sets a corner connection node at the inside corner, abandoning the traditional floor veneer cutting and joining process. Instead, it adopts a continuous upward flipping method for the bottom floor veneer 1 at the inside corner connection node. That is, the bottom floor veneer 1 of the whole width is flipped up at the inside corner of the floor 4 and the side wall 5, and at the inside corner of the floor 4 and the wheel cover 2, instead of being laid on the floor 4 and then joined with the floor veneer on the side wall 5 or the wheel cover 2.

[0027] This embodiment, by turning the entire linoleum up at the inside corner, avoids creating a seam at the bottom of the corner, and the overall upward installation prevents water ingress points at the corner. In traditional methods, the seam at this location is the main channel for moisture and dust to seep in and corrode the floor; the continuous upward turning method fundamentally blocks this channel.

[0028] While using an overall upward-curving connection at the corner joint can avoid a seam at the bottom of the corner, the rigidity of the flooring material can lead to stress concentration during bending, preventing a tight fit with the substrate and resulting in bulges at the bottom of the corner that affect both aesthetics and usability. To avoid these bulges, such as... Figure 3 As shown, the method of connecting the inside corner also includes installing a rounded corner pad 6 at the bottom of the inside corner. The rounded corner pad 6 is fixed to the inside corner position of the floor 4 and the wheel cover 2, or the floor and the side wall 5. The rounded corner pad 6 has two mutually perpendicular mounting surfaces and a concave arc transition surface. The core function of the arc transition surface is to act as a "stress guiding and redistribution surface". It transforms the bending shape that the bottom floor veneer 1 needs to undergo from a "sharp bend" with a very small radius of curvature and high stress concentration into a "gentle bend" with a larger radius of curvature and smooth stress transition, providing continuous support and guiding surface for the upturned bottom floor veneer 1. Without this rounded corner pad 6, the bottom floor veneer 1 may form a suspended bulge at the inside corner due to the stiffness of the material itself. After setting the rounded corner pad 6, the bottom floor veneer 1 can be tightly attached to the arc transition surface under external pressure, and the stress can be evenly distributed, thereby effectively eliminating the bulging phenomenon. The rounded corner pad 6 is made of PVC or rubber. Both materials have the necessary structural strength and a certain degree of flexibility, which can provide effective support and fit well with the bottom floor veneer 1 and the vehicle body substrate.

[0029] In this embodiment, the mounting surface of the rounded corner pad 6 is fixedly connected to the surface of the side panel or the floor. For example, two sets of countersunk bolt holes are opened on the arc transition surface of the rounded corner pad 6. The two sets of countersunk bolt holes are perpendicular to the corresponding mounting surface. The rounded corner pad 6 is fixedly connected to the inside corner by bolt connection. Then, the flooring is bonded to the floor, side panel or wheel cover, and arc transition surface.

[0030] It should be noted that the bottom flooring linoleum 1 laid on the floor 4 is continuously turned up and adhered to the rounded transition surface at the bottom inside corner of the continuous facade, forming a smooth transition surface without seams at the bottom inside corner; on the side facade of the side wall or wheel cover or the front and rear facade of the wheel cover, a facade flooring linoleum 13 is also laid. The facade flooring linoleum 13 is cut into parts to be laid on different facades, such as the side wall part, the side facade part of the wheel cover, and the front and rear facade parts of the wheel cover; the bottom flooring linoleum 1 laid on the floor 4 and the facade flooring linoleum 13 laid on different facade parts are butted together and welded to form a butt weld 12 above the inside corner.

[0031] Understandably, in this embodiment, the joint is moved from the bottom surface (where water easily accumulates and stress is easily exerted) in the traditional process to a relatively higher and drier location. Even if the joint fails to seal in the future due to extreme circumstances, water will have difficulty directly corroding the bus from this location.

[0032] like Figure 1 , Figure 2 , Figure 4 As shown, the bottom floor veneer 1 has an arc-shaped groove 7 at the connection between the front and rear facades and the side facades of the wheel arch 2. This serves two purposes: First, it allows the bottom floor veneer 1 to better adapt to the curved shape of the connection between the front and rear facades and the side facades of the wheel arch 2, ensuring the veneer conforms to the contours of the wheel arch, especially at the upper edge of the rounded corner pads. This ensures there are no gaps between the veneer and the rounded corner pads and the side facades of the wheel arch, preventing moisture and dust from seeping in through the seams and avoiding corrosion of the floor. Second, during vehicle operation, vibrations, impacts, and temperature changes cause the veneer to bear dynamic stress. The arc-shaped groove acts as a "stress relief groove," dispersing concentrated stress over a wider area and preventing stress concentration in a single location.

[0033] like Figure 2 As shown, multiple V-shaped grooves 8 are also provided on the front and rear facades and side facades of the wheel cover 2. The function of the V-shaped grooves 8 is to form multiple interlaced butt welds at the joint position of the bottom floor veneer 1. Compared with the traditional straight butt weld, it can provide a great mechanical interlocking effect and resist shear and peeling stress. When the straight butt weld is subjected to stress parallel to the direction of the butt weld (for example, thermal expansion and contraction of materials, or the misalignment of the two floor veneers caused by vehicle vibration), the entire length of the butt weld will bear the peeling force at the same time, which can easily cause the butt weld to be torn apart from one end.

[0034] The V-groove 8 design decomposes a long, straight stress into numerous short, alternating stresses. When the joint is subjected to shear force, each "tooth" acts like a miniature hook, meshing with the opposite "tooth." To break the joint, all these "teeth" must bend or break simultaneously, requiring a force far greater than that required to peel a straight joint. This significantly enhances the joint's resistance to dynamic stresses caused by vehicle vibrations and passenger foot traffic. Furthermore, the V-groove 8 design prevents the joint from running straight through, dispersing concentrated stress. A continuous straight joint creates a weak line along which stress easily propagates and concentrates, leading to crack propagation. The V-groove 8 breaks this continuous stress transmission path; any crack or stress attempting to propagate along the joint is redirected or terminated at the corner of the "teeth," thus limiting the destructive impact locally and preventing the problem from escalating.

[0035] Furthermore, the V-groove 8 design provides a larger welding area, enhancing sealing strength. Compared to traditional straight butt joints, the actual total length of the welded edge of the V-groove 8 is much greater than that of a straight joint. This means a larger fusion contact area between the welding rod and the bottom flooring 1. The larger welding area not only results in higher mechanical connection strength but also means a larger volume of sealing material, forming a thicker and more durable seal, further reducing the risk of weld failure and leakage.

[0036] In some implementations, multiple V-grooves 8 can be formed on the side facade and at the docking positions.

[0037] In this embodiment, the height range of the bottom floor veneer 1 is 90-120mm, with an optimal height of 100mm. This height range is determined based on a balance between sealing reliability and ease of construction. If the height is below 90mm, the surface bonding area is insufficient, and the waterproof "embankment" height is limited, posing a risk of liquid overflowing the edges. If the height exceeds 120mm, material waste increases, and for some interior structures, an excessively high lift may lead to difficulties in trimming and positioning. Real-vehicle testing has verified that a height of 100mm achieves optimal material utilization and ease of construction while ensuring sufficient bonding area and effective waterproofing height.

[0038] like Figure 5 , Figure 6 As shown, the arc-shaped groove 7 can be cut using the arc-shaped groove tool 9. After the bottom flooring linoleum 1 is installed at the inside corner, the arc-shaped groove tool 9 is used to press against the connection points of the front and rear facades and side facades of the wheel cover. Specifically, as shown... Figure 5 , Figure 6 As shown, the arc-shaped groove tooling 9 includes an arc panel with two cutting edges on both sides. A handle is welded and fixed to the outer side of the arc panel for easy handling by the operator.

[0039] like Figure 7 As shown, the V-groove 8 is cut using the V-groove tooling 10; the V-groove tooling 10 includes a trapezoidal plate, on which two V-grooves are symmetrically opened. A horizontal plate is connected to one end of the two V-grooves facing outwards. The function of the horizontal plate is to align with the top surface of the upturned bottom floor veneer 1. Then, the V-groove 8 is pressed out on the bottom floor veneer 1.

[0040] To ensure a tighter connection between the bottom flooring linoleum 1 and the rounded corner strip at the inside corner, the inside corner connection joint is pressed flat using an inside corner wheel 11 during installation. For example... Figure 8 , Figure 9 As shown, the corner wheel 11 includes a long rod, one end of which is fixedly connected to a wheel groove, and a roller is rotatably connected inside the wheel groove. The other end of the long rod is fixedly connected to a handle, and the operator can hold the handle to push the roller to press the corner.

[0041] like Figure 2As shown, after laying the bottom layer of linoleum 1 on the floor, the top layer of linoleum 13 is laid on the vertical surfaces of the side panels and wheel covers 2, ensuring that all the seams of the linoleum are on the vertical surfaces. Then, a butt weld 12 is applied to the joints of the linoleum. In this embodiment, PVC round welding rods are used, with a hot air welding temperature of 250°C and a cooling time of 5 minutes. These welding parameters ensure that the welding rod and the linoleum material are fully fused together, forming a dense seal. After cooling, the weld is smoothed to ensure a flat surface and prevent the formation of new dirt deposits.

[0042] Example 2 This embodiment discloses a construction method for the layout structure of bus flooring, which utilizes the bus flooring layout structure disclosed in Embodiment 1. The specific steps include: Cut the bottom floor lining 1 and the corresponding vertical floor lining 13 according to the layout of the bus. Clean the back of the bottom flooring 1, and use a hot melt adhesive applicator to apply hot melt adhesive to the non-woven fabric surface of the bottom flooring 1. The adhesive is applied evenly, and the hot melt adhesive peel force is 30N / 2.5cm to ensure that the flooring has sufficient bonding reliability in the vehicle use environment and to prevent delamination. At the inside corners of the floor and side panels or the inside corners of the floor and wheel arches, rounded corner washers are fixed with screws to ensure a tight fit between the rounded corner washers and the floor, side panels, and wheel arches; this creates a flat and stable support base for the subsequent installation of the floor covering. When laying the linoleum flooring, at the inside corner, the bottom linoleum flooring 1 should be turned up 100mm and pressed flat using a corner roller. Pressing flat with a corner roller ensures full contact between the bottom linoleum flooring 1 and the rounded corner pad 6, removes air, achieves a strong bond over the largest area, and ultimately eliminates bulges. The bottom surface of the floor covering 1 on the front and rear facades and side facades of the wheel cover is trimmed using arc groove tool 9 and V-groove tool 10; the arc groove tool 9 and V-groove tool 10 are used for grooving to ensure that the shape and position of the groove are standardized and uniform, thereby improving processing efficiency and quality consistency. Finally, the upper floor linoleum 13 is laid, and the joint between the upper floor linoleum 13 and the lower floor linoleum 1 is welded with a round welding rod. After cooling, it is leveled.

[0043] In this embodiment, the hot melt adhesive is an EVA-based hot melt pressure-sensitive adhesive, with a coating temperature of 170-200°C and a coating speed of 5-10 m / min. EVA-based hot melt adhesives are characterized by strong initial tack, fast curing, and non-toxicity and environmental friendliness. The coating temperature and speed parameters are set to ensure sufficient melting, flowability, and wettability of the adhesive, while achieving a coating speed of 190-210 g / m³. 2 The process window is optimized based on the standard coating amount.

[0044] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A layout structure for bus floor coverings, characterized in that, This includes the entire width of the bottom floor linoleum, laid on the floor excluding wheel covers and the base frame; the vertical floor linoleum is laid on the vertical surfaces of the wheel covers and side panels; An inside corner connection node is set at the inside corner of the floor and the side panel or wheel cover. The bottom surface of the inside corner connection node is turned up to a certain height. A rounded corner pad is installed at the bottom of the inside corner. The rounded corner pad has two mutually perpendicular mounting surfaces and a concave arc transition surface. The bottom linoleum is bonded to the floor, side panels or wheel covers, and rounded transition surfaces; The bottom flooring has an arc-shaped groove at the connection between the front and rear facades and the side facades of the wheel cover, and multiple V-shaped grooves are also made on the front and rear facades and the side facades of the wheel cover.

2. The arrangement structure of bus flooring as described in claim 1, characterized in that, The rounded corner pads are made of PVC or rubber, combining structural strength and flexibility.

3. The arrangement structure of bus flooring as described in claim 1, characterized in that, The height range of the bottom linoleum floor covering is 90-120mm, with the optimal height being 100mm.

4. The arrangement structure of bus flooring as described in claim 1, characterized in that, The arc groove is cut using an arc groove tooling, which includes an arc panel with two cutting edges on both sides and a handle welded to the outer side of the arc panel.

5. The arrangement structure of bus flooring as described in claim 1, characterized in that, The V-groove is cut using a V-groove tooling; the V-groove tooling includes a trapezoidal plate with two V-grooves symmetrically opened on the trapezoidal plate, and a horizontal plate is connected to the two V-grooves at their opposite outward ends.

6. The arrangement structure of bus flooring as described in claim 1, characterized in that, The corner connection nodes are pressed flat using a corner roller when laying the flooring.

7. The arrangement structure of bus flooring as described in claim 1, characterized in that, The joint between the bottom flooring and the upper flooring is located on the upper surface of the side panel and wheel arch, and a butt weld is applied at the joint.

8. A construction method for the arrangement structure of a bus floor covering as described in any one of claims 1-7, characterized in that, The specific steps include: Cut the floor veneer into pieces and clean the back of the veneer before applying hot melt adhesive. Fix rounded corner pads at the inside corners of the floor and the side panels or wheel covers; lay the bottom floor veneer, and turn it up at the inside corners to a set height, then press it flat with inside corner wheels; use arc groove tools and V-groove tools to trim the bottom floor veneer on the front and rear facades and side facades of the wheel covers; The flooring is laid on the facade, and the joints of the flooring are welded with round welding rods. After cooling, the joints are smoothed.

9. The construction method for the layout structure of bus flooring as described in claim 8, characterized in that, The peel strength of the hot melt adhesive is 30N / 2.5cm.

10. The construction method for the layout structure of bus flooring as described in claim 8, characterized in that, The hot melt adhesive is an EVA-based hot melt pressure-sensitive adhesive, with a coating temperature of 170-200°C and a coating speed of 5-10 m / min.

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