Panel structure

Abstract

To provide a panel structure capable of simplifying construction.SOLUTION: A panel structure comprises a lower panel 1a and an upper panel 1b which are attached side by side one above the other. The lower panel 1a has a step portion 2 formed recessed from an upper end of a front surface. The step portion 2 has an attachment portion 3 for an attachment surface 24, an inclined portion 4 located below the attachment portion 3, and an engaging portion 5 located above the attachment portion 3. The upper panel 1b has a covering portion 6 at its lower end which covers the step portion 2 of the lower panel 1a. The covering portion 6 has an engaged portion 7 engaged with the engaging portion 5 of the lower panel 1a from above, a water-cutting piece 8 located at its lower end, and a position regulating piece 9 protruding rearward from the water-cutting piece 8. A tip of the position regulating piece 9 is in contact with the inclined portion 4 of the lower panel 1a, and a lower end of the water-cutting piece 8 is spaced apart from the step portion 2.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a panel structure used for walls, fences, etc. [Background technology]

[0002] 2. Description of the Related Art Panel structures such as fences have been known in the past, each constructed by attaching panels to a plurality of posts spaced apart from one another. However, there is a demand for simplified construction of such panel structures. Summary of the Invention [Problem to be solved by the invention]

[0003] In view of the above-mentioned circumstances, an object of the present invention is to provide a panel structure that can be constructed simply. [Means for solving the problem]

[0004] In order to achieve the above object, the panel structure of the invention described in claim 1 comprises a lower panel and an upper panel that are attached side by side, the lower panel having a step portion formed recessed from the upper end of the visible surface, the step portion having an attachment portion for the attachment surface, an inclined portion located below the attachment portion, and an engaging portion located above the attachment portion, the upper panel having a covering portion at its lower end that covers the step portion of the lower panel, the covering portion having an engaged portion that engages with the engaging portion of the lower panel from above, a water-shedding piece located at its lower end, and a position-regulating piece that protrudes rearward from the water-shedding piece, the tip of the position-regulating piece abutting the inclined portion of the lower panel, and the lower end of the water-shedding piece being spaced apart from the step portion. [Effects of the Invention]

[0005] The panel structure according to claim 1 comprises a lower panel and an upper panel mounted side by side, the lower panel having a stepped portion recessed from the upper end of the visible surface, the stepped portion having an attachment portion for the attachment surface, a sloped portion located below the attachment portion, and a locking portion located above the attachment portion, the upper panel having a covering portion at its lower end that covers the stepped portion of the lower panel, the covering portion having an engaged portion that engages with the locking portion of the lower panel from above, a water-shedding piece located at its lower end, and a position-regulating piece that protrudes rearward from the water-shedding piece, the tip of the position-regulating piece abutting the sloped portion of the lower panel, and the lower end of the water-shedding piece is spaced apart from the stepped portion, making panel installation easy and stable, thereby simplifying construction. It also prevents water from accumulating between the upper and lower panels. [Brief explanation of the drawings]

[0006] [Figure 1] 1A is a front view of a wall showing a first embodiment of a panel structure, and FIG. 1B is a plan view of the same. [Figure 2] 2 is a cross-sectional view taken along the line AA in FIG. 1. [Figure 3] FIG. 3 is an enlarged longitudinal sectional view of the X portion of FIG. 2. [Figure 4] FIG. 3 is an enlarged longitudinal cross-sectional view showing the upper side of FIG. 2. [Figure 5] 2 is a cross-sectional view of FIG. 1 taken along line B-B. [Figure 6] FIG. 10 is a vertical cross-sectional view showing how the panel is attached. [Figure 7] These are enlarged longitudinal cross-sectional views of the upper part of the same structure, where (a) shows the second-highest panel at the reference height, (b) shows the same panel at its highest position, and (c) shows the same panel at its lowest position. [Figure 8] FIG. 10 is a vertical cross-sectional view of a carport showing a second embodiment of the panel structure. [Figure 9] FIG. 10 is a vertical cross-sectional view showing a modified example of the panel structure of the second embodiment. [Figure 10] FIG. 10 is a vertical cross-sectional view of a multi-roof showing a third embodiment of a panel structure. DETAILED DESCRIPTION OF THE INVENTION

[0007] The following describes the embodiments with reference to the drawings. Of the first, second, and third embodiments described below, the embodiment of the invention described in claim 1 is the first, second, and third embodiments, and the explanation of this invention is given in paragraphs

[0011] to

[0015] . 1 to 5 show a first embodiment of a panel structure 19. This embodiment is applied to a wall 16 installed at the boundary between a residential site and a road, beside a gate, or the like. 1, 2, and 5, the wall 16 is made up of three pillars 17 erected at intervals from the ground G, with girders 18 erected on the top ends of the pillars 17 to form a framework, and a panel structure 19 is provided on the road-side and site-side facing surfaces of the framework, with horizontally long panels 1, 1, ..., 12 attached in a vertical line. Frames 20 are attached to the top surfaces of the girders 18 and the outer surfaces of the left and right pillars 17, respectively, and the frames 20 hide the edges of the panels 1, 1, ..., 12.

[0008] The pillar 17 is formed from an extruded aluminum alloy material, and as shown in FIG. 5, is formed in a hollow shape with a square cross section. Base members 21 for mounting frames 20 are attached to the outer surfaces of the left and right pillars 17 at intervals in the vertical direction, and the frames 20 are attached by engaging a pair of claws 64, 64 with the base members 21. The frames 20 have swallowing portions 22 that swallow the ends of the panels 1, 1, ..., 12, and the ends of the panels 1, 1, ..., 12 are swallowed into the swallowing portions 22. A reinforcement member 23 is attached to the visible surfaces of the pillar 17 on the road side and the site side. The reinforcement member 23 is made of an extruded aluminum alloy profile and has panel mounting sections 24 that protrude in the visible direction and are formed in two rows with a gap in the left and right direction, and a recessed section 25 formed in the center. The reinforcement member 23 is fixed to the pillar 17 at the position of the recessed section 25 with screws 26. Panels 1, 1, ... are attached to the panel mounting sections 24 with screws 27.

[0009] The girder 18 is formed from an extruded aluminum alloy member, and as shown in Figure 4, has a hollow portion 28 with a rectangular cross section and a recess 29 that opens downward below the hollow portion 28, continuing in the longitudinal direction. The upper ends of the columns 17 are inserted into the recess 29 and fixed to the bottom wall of the recess 29 with metal fittings (not shown). Base members 21 are attached to the upper surface of the girder 18 at intervals in the longitudinal direction of the girder 18, and frames 20 are attached in engagement with the base members 21.

[0010] 1 and 2, the panel structure 19 is constructed by attaching panels 1, 1, ..., 12 made of extruded aluminum material in order from the bottom (one side) to the top (the other side). The panels 1, 1, ... from the bottom to the second highest row have the same cross-sectional shape, and the topmost row panel 12 is an error-absorbing panel that can absorb dimensional errors and construction errors of the panels 1, 1, ...

[0011] As shown in Figure 2, of the adjacent panels 1, 1, the lower panel (lower panel) 1a has a visible wall 30 and a step portion 2 formed recessed from the upper end of the visible wall 30. The visible wall 30 has a plurality of ribs 31 provided on the back side at intervals in the vertical direction. 3, the step portion 2 has an attachment portion 3 for attaching to the attachment surface (the panel attachment portion 24 of the extension material 23), an inclined portion 4 located below the attachment portion 3, a horizontal portion 32 connecting the inclined portion 4 and the visible wall 30, and a locking portion 5 located above the attachment portion 3. The locking portion 5 is provided with a gap from the attachment surface 24, and its upper end portion 5a is formed at an angle toward the front.

[0012] Of the adjacent panels 1, 1, the upper panel (upper panel) 1b has a visible wall 30 and a covering portion 6 provided at the lower end of the visible wall 30 and covering the step portion 2 of the lower panel 1a, as shown in Figure 2. 3, the covering portion 6 has an engaged portion 7 that engages with the engaging portion 5 of the lower panel 1a from above, a water separator 8 formed at its lower end via a horizontal portion 33 so as to be recessed from the visible wall 30, and a position restricting piece 9 that protrudes rearward from the lower end of the water separator 8, the tip of which abuts against the inclined portion 4 of the lower panel 1a, and the lower end of the water separator 8 is spaced apart from the horizontal portion 32 of the stepped portion 2 of the lower panel 1a. Between the lower panel 1a and the upper panel 1b, a concave joint 34 is formed with a fixed width by the horizontal portion 32 of the lower panel 1a and the horizontal portion 33 and water separator 8 of the upper panel 1b. The lower panel 1a and the upper panel 1b have the same cross-sectional shape, and both panels 1a and 1b have a step portion 2 formed on the upper side of the visible wall 30 and a covering portion 6 formed on the lower side of the visible wall 30.

[0013] Figure 6 shows how to attach the upper panel 1b by stacking it on top of the lower panel 1a. First, as shown in Figure 6(a), the rear surface of the upper panel 1b is brought into contact with the attachment surface 24, and then, as shown in Figure 6(b), the upper panel 1b is slid downward. 6(c), the locked portion 7 locks onto the locking portion 5 of the lower panel 1a from above, and the position restricting piece 9 abuts against the inclined portion 4 of the lower panel 1a. As the position restricting piece 9 abuts against the inclined portion 4 of the lower panel 1a, the lower end of the upper panel 1b is pushed forward, and the locked portion 7 and the locking portion 5 are locked in a tightly fitted state, thereby preventing the lower end of the upper panel 1b from flapping. In this state, the mounting portion 3 at the top of the upper panel 1b is fixed to the mounting surface 24 with the screw 27. In this manner, the panels 1, 1, ... are attached in order from bottom to top.

[0014] As shown in Figure 2, a starter material 63 is provided at the lower end of the panel structure 19. The panel 1 on the lowest level is attached by engaging its lower end with the starter material 63 from above and fixing the mounting portion 3 to the mounting surface 24 with screws 27. The panel 1 on the lowest level is embedded in the ground G.

[0015] As described above, the panel structure 19 includes the lower panel 1a and the upper panel 1b, which are attached next to each other, as shown in FIG. 3. The lower panel 1a has a step portion 2 formed recessed from the upper end of the facing surface (the front surface of the facing wall 30). The step portion 2 has a mounting portion 3 for the mounting surface (the panel mounting portion 24 of the extension member 23), an inclined portion 4 located below the mounting portion 3, and a locking portion 5 located above the mounting portion 3. The upper panel 1b has a lower end The covering portion 6 has a covering portion 6 that covers the step portion 2 of the lower panel 1a, and the covering portion 6 has an engaged portion 7 that engages with the engaging portion 5 of the lower panel 1a from above, a water-shedding piece 8 located at the lower end, and a position-regulating piece 9 that protrudes rearward from the water-shedding piece 8, and the tip of the position-regulating piece 9 abuts against the inclined portion 4 of the lower panel 1a and the lower end of the water-shedding piece 8 is spaced away from the step portion 2, so that the panels 1a, 1b can be attached easily and stably, thereby simplifying construction. That is, as shown in Figure 6, when the rear surface of the upper panel 1b is abutted against the mounting surface 24 and the upper panel 1b is slid downward, the engaged portion 7 engages with the engaging portion 5 of the lower panel 1a from above, and the position regulating piece 9 abuts against the inclined portion 4 of the lower panel 1a, holding the lower end of the upper panel 1b so that it does not flap; in this way, the upper panel 1b can be temporarily placed on the lower panel 1a and the mounting portion 3 can be screwed in, making for easy installation. 3, step 2 at the upper end of lower panel 1a has locking portion 5 provided above mounting portion 3, and there is no wall or other obstacle in front of water separator 8 of upper panel 1b that would impede the flow of water, so water flows down the visible surface of upper panel 1b, and water that falls from water separator 8 onto horizontal portion 32 of lower panel 1a flows down the visible surface of lower panel 1a, preventing water from pooling in the area between upper panel 1b and lower panel 1a (joint 34). Step 2 of lower panel 1a has inclined portion 4 behind horizontal portion 32, preventing water from reaching mounting portion 3 or locking portion 5. The upper end 5a of the locking portion 5 of the lower panel 1a is formed at an angle toward the front, so that when the rear surface of the upper panel 1b is pressed against the mounting surface 24 and slid downward, the locked portion 7 can be easily locked to the locking portion 5 of the lower panel 1a, further improving workability.

[0016] As shown in Figure 4, the error absorption panel 12 provided on the top row of the panel structure 19 has an end panel 13, a joint bottom forming material 14 that forms the joint bottom 50 between the end panel 13 and the panel 1 in the second row from the top, and an end panel support 35 that supports the end panel 13. The end panel 13 is formed from extruded aluminum and has a facing wall 36 that is flush with the facing walls 30 of the panels 1, 1, ..., a protrusion 37 that protrudes rearward from the lower end of the facing wall 36, an attachment portion 38 that protrudes rearward from the upper end of the facing wall 36, and a downward hook-shaped engaging portion 39 that protrudes rearward from the middle part of the facing wall 36 in the vertical direction. The joint bottom forming material 14 is made from an extruded aluminum profile and has a mounting portion 41 at the top that abuts against the mounting surface (panel mounting portion 24 of the extension material 23) and is fixed with screws 40, and has a hanging piece 42 that bends in a crank shape from the lower end of mounting portion 41 and extends forward, and extends downward to cover the step portion 2 of the second-from-the-top panel 1. The lower end of hanging piece 42 is formed with a protrusion 43 that protrudes to the rear, and the tip of protrusion 43 abuts against the sloped portion 4 of the second-from-the-top panel 1. The end panel support 35 is formed from an extruded aluminum profile and has a facing wall 45 that abuts against the facing surface of the girder 18 and is fixed with screws 44, a locking portion 46 formed at the lower end of the facing wall 45 and to which the locked portion 39 of the end panel 13 locks from above, and a facing wall 47 formed to protrude in the front-to-rear direction from the upper end of the facing wall 45. The mounting portion 38 of the end panel 13 is placed on the facing wall 47 and fixed with screws 48.

[0017] The procedure for installing the error absorption panel 12 will now be explained. First, slide the joint bottom forming material 14 downward while pressing its mounting portion 41 against the mounting surface 24, so that the protrusion 43 at the bottom end abuts against the inclined portion 4 of the second-highest panel 1, and then secure the mounting portion 41 with the screw 40 from the front. Next, the end panel support 35 is attached by engaging the rear end of the blind wall 47 with the top surface of the girder 18 and abutting the blind wall 45 against the blind surface of the girder 18 and fixing it with screws 44 from the front side. Next, the end panel 13 is attached by engaging the engaging portion 39 with the engaging portion 46 of the end panel holder 35 from above, and placing the mounting portion 38 on the upper surface of the projecting wall 47 of the end panel holder 35 and fixing it in place with screws 48 from above. When the end panel 13 is attached in this manner, the tip of the protrusion 37 at the lower end of the end panel 13 abuts against the hanging piece 42 of the joint bottom forming material 14, and a concave joint 15 is formed by the protrusion 37 of the end panel 13, the hanging piece 42 of the joint bottom forming material 14, and the horizontal part 32 of the panel 1 second from the top.

[0018] The vertical dimensions of the panels 1 may become slightly larger or smaller due to dimensional errors, and the mounting position may be slightly higher or lower due to construction errors. Even if the dimensional errors and construction errors of each panel 1 are small, these errors can accumulate as the panels 1 are mounted in order from bottom to top, resulting in an error of about 10 to 20 mm. This panel structure 19 is able to absorb such errors by providing an error absorption panel 12 above the second-highest panel 1.

[0019] Figure 7(a) shows the state when the second-highest panel 1 is at the reference height (design height), Figure 7(b) shows the state when the second-highest panel 1 has risen to the top due to dimensional and construction errors of panels 1, 1, ..., and Figure 7(c) shows the state when the second-highest panel 1 has fallen to the bottom due to dimensional and construction errors of panels 1, 1, .... As shown in Figure 7(a), when the second-highest panel 1 is at the reference height (design height), the width of the joint 15 between the end panel 13 and the second-highest panel 1 is approximately the same as the width of the joint 34 between the panels 1. As shown in Figure 7(b), when the second-highest panel 1 is raised, the joint bottom forming material 14 rises to match the second-highest panel 1 and is attached, and the end panel support 35 is pushed up onto the upper end of the joint bottom forming material 14 and attached. The end panel 13 is attached by rising up the same amount as the end panel support 35, and the upper end of the end panel 13 is swallowed into the swallowing portion 22 of the frame 20. The width of the joint 15 between the end panel 13 and the second-highest panel 1 is very small, about 1 mm. As shown in Figure 7(c), when the second-highest panel 1 drops down, the joint bottom forming material 14 drops down and is attached to match the second-highest panel 1. The end panel support 35 and end panel 13 are attached at the same height as in Figure 7(a), and the width of the joint 15 between the end panel 13 and the second-highest panel 1 is wider, absorbing the error caused by the panel 1 dropping down. In this way, the error absorbing panel 12 adjusts the mounting position up and down to match the joint bottom forming material 14 with the second-highest panel 1, and the end panel 13 is attached along the joint bottom forming material 14 to form a joint 15, and by changing the width of the joint 15, an error of approximately plus or minus 15 mm can be absorbed.

[0020] As described above, the panel structure 19, as shown in Figures 4 and 7, comprises panels 1, 1, ... and an error absorption panel 12, and the panels 1, 1, ... are attached sequentially from one side (lower side) to the other side (upper side). The error absorption panel 12 is provided on the other side of the panel 1 and has an end panel 13 and a joint bottom forming material 14 that forms the joint bottom 50 between the end panel 13 and the panel 1. The end panel 13 is attached along the joint bottom forming material 14 to form the joint 15, so that dimensional errors and construction errors of the panels 1, 1, ... can be absorbed (see Figure 7), and construction can be carried out without any problems even if there are dimensional errors and construction errors of the panels 1, 1, ..., simplifying construction. The error absorbing panel 12 has an end panel receiver 35 for receiving the end panel 13, and the mounting position of the end panel receiver 35 can be adjusted freely in the direction in which the panels 1, 1, ... are arranged, so that it becomes easier to mount the end panel 13 in a state that absorbs the dimensional errors and construction errors of the panels 1, 1, ..., and workability is further improved. Furthermore, this panel structure 19 has a frame 20 into which the other end of the end panel 13 can be inserted and which can absorb displacement of the end panel 13 in the direction in which the panels 1, 1, ... are arranged, making it easy to install and, since the other end of the end panel 13 is hidden by the frame 20, it also has good design properties.

[0021] 8 shows a second embodiment of the panel structure 19. In this embodiment, the panel structure 19 is applied to a side wall 52 of a carport 51. The carport 51 is made up of a rectangular frame of front and rear girders 53 and left and right side girders 54, with a roof 56 attached to the inner periphery of this frame 55. A ceiling 57 made of extruded aluminum panels is attached below the roof 56. The side girders 54 are erected on pillars 17 spaced apart in the front-to-rear direction.

[0022] The structure of the wall 52 itself is the same as in the first embodiment, and a panel structure 19 is provided, which is made up of panels 1, 1, ... attached in a vertical line to the outer and inner surfaces of a framework formed by side girders 54 and columns 17. Of the outer panel structure 19 and the inner panel structure 19, the outer panel structure 19a has the same structure as in the first embodiment. That is, the panels 1, 1, ... are attached in order from bottom to top, and the error absorbing panel 12 is attached to the top row to absorb dimensional errors and construction errors of the panels 1, 1, ...

[0023] Of the outer panel structure 19 and the inner panel structure 19, the inner panel structure 19b needs to have its upper end lower in height position than the outer panel structure 19a by the height of the stringer 54 and the thickness of the ceiling 57.To achieve this, the number of panels 1, 1, ... arranged vertically is reduced by one compared to the outer panel structure 19a, and an adjustment material 10 is attached to the upper side of the topmost panel 1 to adjust the upper end height position. The adjustable member 10 is formed from an extruded aluminum profile and has an attachment portion 58 for the attachment surface (the panel attachment portion 24 of the extension member 23) and an overlapping piece 11 that hangs down from the attachment portion 58 and overlaps the visible surface of the panel 1. The attachment portion 58 is formed in a U-shaped groove with an open interior. The attachment portion 58 is screwed to the attachment surface 24 with screws 59 from the inside, and a batten 60 is attached to close the groove of the attachment portion 58. The attachment position of the adjustable member 10 can be adjusted up and down within the range in which the overlapping piece 11 overlaps the visible surface of the panel 1. Note that in the example of Figure 8, a gap is formed between the upper end of the adjustable member 10 and the ceiling 57, but the upper end of the adjustable member 10 can also be attached by abutting the ceiling 57. The height positions of the joints 34 of the outer panel structure 19a and the inner panel structure 19b are aligned.

[0024] 9 shows a modified example of the panel structure 19 of the second embodiment in which a ceiling 57 is not provided below the roof 56. The inner panel structure 19b has the adjusting material 10 attached by raising it up to accommodate the absence of the ceiling 57, with the upper end of the adjusting material 10 abutting the underside of the gutter portion 61 of the roof 56. The overlap dimension of the overlapping piece 11 with the panel 1 is reduced by the amount that the adjusting material 10 is raised up.

[0025] 10 shows a third embodiment of the panel structure 19. This embodiment is applied to the side wall 52 of a multi-roof 62 used as a roof for the approach to the entrance or as a terrace roof. In this multi-roof 62, the height dimension of the side girders 54 is smaller than that of the carport 51 shown in FIG. In this multi-roof 62, similarly to the second embodiment, panel structures 19 are provided on the outside and inside of a framework formed by side girders 54 and columns 17. Of the outer panel structure 19 and the inner panel structure 19, the outer panel structure 19a has the same structure as in the first embodiment. That is, the panels 1, 1, ... are attached in order from bottom to top, and the error absorbing panel 12 is attached to the top row to absorb dimensional errors and construction errors of the panels 1, 1, ... Of the outer panel structure 19 and the inner panel structure 19, the inner panel structure 19b is constructed in the same manner as in the second embodiment, by attaching the panels 1, 1, ... in order from bottom to top, and then attaching the adjustment material 10 to the upper side of the last panel 1c attached.

[0026] In the second embodiment, the number of panels 1, 1, ... arranged in the vertical direction of the inner panel structure 19b was reduced by one compared to the outer panel structure 19a, and then the adjusting material 10 was attached, but in this embodiment, because the height dimension of the stringer 54 is reduced, if the number of panels 1 is reduced by one and the adjusting material 10 is attached, the overlapping piece 11 of the adjusting material 10 will not overlap with the visible surface of the panel 1. Therefore, a panel 1c having a smaller visible dimension than the other panels 1, 1, ... is attached to the underside of the adjusting material 10, and the overlapping piece 11 of the adjusting material 10 is overlapped with the visible surface of that panel 1c.

[0027] As described above, the inner panel structure 19b of the panel structure 19 of the second and third embodiments comprises panels 1, 1, ... and adjustment material 10, as shown in Figures 8, 9 and 10, and the panels 1, 1, ... are attached sequentially from one side (lower side) to the other side (upper side), and the adjustment material 10 is arranged on the other side of the panel 1 and has an overlapping piece 11 that overlaps the visible surface of the panel 1. Therefore, by moving the adjustment material 10, it is possible to flexibly accommodate differences in dimensions in the direction in which the panels 1, 1, ... are arranged, thereby simplifying construction. In other words, even if the height of the wall 52 changes, or there are dimensional errors in the panels 1, 1, ..., or there are construction errors in the installation of the panels 1, 1, ..., such dimensional differences can be absorbed by changing the overlap dimension between the end panel 1 and the overlap piece 11 of the adjustment material 10, making construction easy. The adjusting material 10 has a batten 60 that hides the mounting screws 59, so the mounting screws 59 are not exposed to the outside, resulting in a good design. By attaching a panel 1c having a smaller apparent dimension than the other panels 1, 1, ... to one side of the adjustment material 10 (see Figure 10), it becomes possible to flexibly accommodate dimensional differences that cannot be accommodated with the adjustment material 10 alone, making construction even easier.

[0028] The present invention is not limited to the above-described embodiments. The material and cross-sectional shape of the panels can be changed as appropriate. The upper and lower panels do not need to have the same cross-sectional shape. The structure and type of the structure to which the panels are attached are not important. The present invention can be widely applied to panel structures formed by attaching panels side by side. [Explanation of symbols]

[0029] 1 panel 1a Lower panel (panel) 1b Upper panel (panel) 2 Step 3 Mounting part 4 Slope 5 Locking part 6 Covering part 7 Locked part 8 water section 9 Position regulation piece 10 Adjustment material 11 Overlapping Pieces 12 Error absorption panel 13 End Panel 14 Joint bottom forming material 15 Joint 19, 19a, 19b Panel structure

Claims

[Claim 1] A panel structure comprising a lower panel and an upper panel that are attached side by side, the lower panel having a stepped portion formed recessed from the upper end of the visible surface, the stepped portion having an attachment portion for the attachment surface, an inclined portion located below the attachment portion, and an engaging portion located above the attachment portion, the upper panel having a covering portion at its lower end that covers the stepped portion of the lower panel, the covering portion having an engaged portion that engages with the engaging portion of the lower panel from above, a water-shedding piece located at its lower end, and a position-regulating piece that protrudes rearward from the water-shedding piece, the tip of the position-regulating piece abutting the inclined portion of the lower panel, and the lower end of the water-shedding piece being spaced apart from the stepped portion.

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