Front visor structure

Abstract

To provide a front visor structure which secures drainage performance of liquid, such as rain water, and then improves aerodynamic performance.SOLUTION: A front visor structure 10 includes: a base part 12 which is attached in a belt form to a front part 3F of a roof part 3 along a vehicle width direction and has an upper surface part 12A and a front wall part 12B; a visor part 11 which is disposed spaced apart in a forward direction from the front wall part 12B of the base part 12, attached through an attachment member 15 to the front part 3F of the roof part 3, and extends forward in an eaves form from the front part 3F of the roof part 3; a drip rail part 13 which is formed in a groove shape, extending along the vehicle width direction and forming an opening facing upward, on the upper surface part 12A of the base part 12 to guide liquid to a side drip rail provided at a border between a side surface part of a cab 2 and the roof part 3; and a flow straightening part 18 for straightening air passing through a gap between the front wall part 12B and the visor part 11 from the lower side to the upper side.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a front visor structure disposed at the front of a roof portion of a vehicle cab. [Background technology]

[0002] 2. Description of the Related Art Conventionally, it is known to attach a canopy-shaped front visor to the upper part of the windshield in the cab of a truck to block sunlight. When a front visor is attached to a cab, a gap is provided between the roof of the cab and the front visor to release wind pressure while driving, but rainwater may flow onto the windshield through this gap. For this reason, a technique has been proposed in which a rain gutter fixed to the front visor is disposed between the roof of the cab and the front visor (see Patent Document 1 below). In the technique of Patent Document 1, a wind vent hole is drilled in the rain gutter. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 58-68312 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional technology of the above-mentioned Patent Document 1, the rain gutters are arranged in the gaps for releasing wind pressure while traveling, so air resistance during traveling is likely to increase. In this regard, the conventional technology has wind vent holes drilled in the rain gutters, but there is a risk that air resistance cannot be sufficiently reduced. Therefore, in the conventional technology, when a front visor is attached to a cab, there is room for improvement in terms of improving aerodynamic performance while ensuring the drainage of liquids such as rainwater. Therefore, the front visor structure of the present invention aims to improve aerodynamic performance while ensuring the drainage of liquids such as rainwater. [Means for solving the problem]

[0005] The present invention has been made to solve at least part of the above problems, and can be realized in the following aspects or application examples.

[0006] (1) The front visor structure according to this application example is a front visor structure disposed in a front portion of a roof portion of a cab of a vehicle, and is attached in a strip shape along the vehicle width direction to the front portion of the roof portion, and includes a base portion having an upper surface portion forming a planar area extending in the vehicle width direction and the front-rear direction, and a front wall portion extending downward from an outer edge portion of the upper surface portion opposite the roof portion and forming a planar area extending in the up-down direction, and a base portion disposed forward and spaced apart from the front wall portion of the base portion, and the roof portion. The cab is provided with a visor portion attached to the front portion of the roof portion via an attachment member and extending forward from the front portion of the roof portion in a eave-like manner, and the upper surface portion of the base portion is formed in a groove shape extending along the vehicle width direction and having an upward opening, and is provided with a drip rail portion for guiding liquid to a side drip rail provided at the boundary between the side portion of the cab and the roof portion, and a straightening portion for straightening air passing through the gap between the front wall portion and the visor portion from below to above.

[0007] This front visor structure includes a visor portion and a base portion, and a drip rail portion is provided on the upper surface of the base portion to guide liquid such as rainwater to the side drip rail, and a rectifying portion is provided to rectify the air passing through the gap between the front wall portion and the visor portion from below to above. Therefore, liquid such as rainwater flowing down from the roof portion is drained to the side drip rail through the drip rail portion, and the rectifying portion rectifies the wind during driving. Therefore, the aerodynamic performance can be improved while ensuring the drainage of liquids such as rainwater.

[0008] (2) In addition, in the front visor structure related to this application example, the drip rail portion may include a main portion arranged above the side drip rail, and a flow lower portion forming an inclined surface that descends from an end of the main portion toward the side drip rail. In this case, liquid such as rainwater flowing down from the roof portion onto the main portion is reliably guided to the side drip rail through the flow portion, thereby ensuring the drainage of liquid such as rainwater. (3) In the front visor structure according to this application example, the drip rail portion may include a step portion in which the height of a bottom surface of the drip rail portion decreases in a stepped manner from the main portion toward the flow lower portion. This step portion prevents liquid such as rainwater flowing along the main portion toward the side drip rail from flowing back during braking, for example, and therefore ensures the drainage of liquid such as rainwater more reliably.

[0009] (4) In the front visor structure according to this application example, the bottom surface of the main portion may be inclined downward from the center in the vehicle width direction toward the flow lower portion. In this case, liquid such as rainwater can be easily drained from the main portion 13A to the side drip rail 6. (5) In addition, in the front visor structure according to this application example, the lower portion of the front wall portion of the base portion may include a curved portion that, in a cross-section viewed from the side along the vehicle width direction, bulges forward as it extends upward. In this case, the curved shape of the curved surface portion further improves the aerodynamic performance during running at the airflow straightening portion. Effect of the Invention

[0010] According to the front visor structure of the present invention, it is possible to improve aerodynamic performance while ensuring the drainage of liquids such as rainwater. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view of a vehicle to which a front visor structure according to an application example is applied. [Diagram 2] FIG. 2 is a cross-sectional view of the front visor structure taken along line AA in FIG. [Diagram 3] FIG. 2 is an exploded perspective view of the front visor structure of FIG. 1. [Figure 4] FIG. 3 is an exploded perspective view showing a state in which the base portion is attached to the stay in the front visor structure. [Diagram 5] FIG. 2 is an enlarged perspective view showing a part of a drip rail portion of the front visor structure of FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The embodiments of the present invention will be described with reference to the drawings. The following embodiments are merely examples, and are not intended to exclude the application of various modifications and techniques not specified in the embodiments. The configurations of the following embodiments can be modified in various ways without departing from the spirit of the embodiments. In addition, they can be selected or combined as necessary.

[0013] Hereinafter, the front-rear direction of the vehicle to which the front visor structure according to this embodiment is applied is also referred to as the vehicle length direction, and the left-right direction of the vehicle is also referred to as the vehicle width direction. Also, the up-down direction perpendicular to both the front-rear direction and the left-right direction is also referred to as the vehicle height direction. The left-right direction is determined based on the posture of the vehicle facing forward. In the drawings, the front is indicated by "FR", the rear is indicated by "RR", the left is indicated by "LH", the right is indicated by "RH", the upper side is indicated by "UP", and the lower side is indicated by "DW".

[0014] [1. Configuration] FIG. 1 is a perspective view of the exterior of a truck, which is an example of a vehicle 1 to which a front visor structure 10 according to this embodiment is applied, viewed from the front left side. 1 is, for example, a large cab-over type truck, and has an engine (not shown) mounted below a cab 2. Behind the cab 2, a mounted object 1A such as a cargo box is mounted. The cab 2 is disposed at the front of a frame (not shown) that forms the skeleton of the body, and is a roughly box-shaped section that defines the vehicle interior including the driver's seat and passenger seat.

[0015] As shown in Fig. 1, the cab 2 includes a roof portion 3 forming the top surface of the vehicle compartment, a pair of side portions 4 forming side walls of the vehicle compartment, and a front portion 5 forming a front wall of the vehicle compartment. In detail, the pair of side portions 4 are arranged spaced apart from each other in the vehicle width direction (left-right direction). The front portion 5 is arranged forward of the side portions 4, and the roof portion 3 is arranged above the pair of side portions 4 and the front portion 5. In addition to the above, the cab 2 includes a rear portion (not shown) that is disposed rearward of the side portions 4 and forms the rear wall of the vehicle compartment, and a bottom portion (not shown) that is connected to the lower ends of the side portions 4, the front portion 5, and the rear portion and forms the floor of the vehicle compartment. The side portions 4, the front portion 5, and the rear portion are all erected in the vertical direction. Meanwhile, the roof portion 3 and the bottom portion are each extended so as to widen in the front-rear direction and the vehicle width direction.

[0016] The front portion 5 of the cab 2 includes a windshield 5A and front pillars 5L, 5R provided on the left and right sides of the windshield 5A. The front pillars 5L, 5R are disposed at the left and right corners that form the boundaries between the front portion 5 and each side portion 4. Each side portion 4 is provided with a door 4A that closes an opening (not shown) that serves as an entrance to and exit from the cab 2. In addition, side drip rails 6 extend in the front-rear direction at the boundaries (upper edges of the side surfaces 4) between the roof 3 and the left and right side surfaces 4 of the cab 2. The side drip rails 6 are groove-shaped portions for directing liquids such as rainwater to the front pillars 5L, 5R.

[0017] The roof section 3 is formed of panel members forming the upper surface of the cab 2. Specifically, the roof section 3 in FIG. 1 includes a central panel 3A forming the top, a pair of side panels 3L, 3R arranged on the left and right of the central panel 3A, and a front panel 3B arranged in front of the central panel 3A. As shown in FIG. 1, the front panel 3B is connected at its lower end to the upper edge of the windshield 5A and is configured as an inclined surface that slopes upward from the front to the rear. In the roof section 3, the front panel 3B and parts of the front sides of the side panels 3L, 3R are referred to as the "front section 3F" of the roof section 3. The front section 3F is a part of the roof section 3 located on the front side. It should be noted that while the roof portion 3 in FIG. 1 is exemplified as a super high roof structure that is set higher than a normal roof, the structure of the roof portion 3 is not limited to this.

[0018] As shown in FIG. 1, a front visor structure 10 is provided on a front portion 3F of the roof portion 3. The front visor structure 10 is a structure for attaching a visor (visor portion 11) which is a sunshade member to the front portion 3F of the roof portion 3. The front visor structure 10 includes an eave-shaped visor portion 11 which forms the main body of the visor, and a base portion 12 which is interposed between the visor portion 11 and the front portion 3F of the roof portion 3.

[0019] The visor portion 11 is a resin member extending forward like a canopy from the front portion 3F of the roof portion 3, and is a sunshade member for blocking sunlight entering the cab 2 through the windshield 5A. The visor portion 11 extends along the vehicle width direction so as to cover the upper portion of the windshield 5A at the front portion 3F of the roof portion 3. The dimension of the visor portion 11 in the vehicle width direction is preferably set to be larger than the dimension of the windshield 5A in the vehicle width direction. In addition, the dimension of the visor portion 11 extending like a canopy is appropriately set so as to ensure sunshade performance.

[0020] The base portion 12 is a resin member attached in a band-like (belt-like) shape to the front portion 3F, and the base portion 12 is provided as a base for attaching a drip rail portion 13 and a straightening portion (symbol 18 in Figure 2) described later to the front visor structure 10. 1, the base portion 12 extends across the front panel 3B and parts of the front sides of the side panels 3L and 3R. Specifically, the base portion 12 includes a central portion disposed in the center in the vehicle width direction corresponding to the front panel 3B, a bent portion bent along a corner portion forming the boundary between the front portion 5 and the side portion 4 of the cab 2, and a side portion extending rearward from the bent portion along the side portion 4.

[0021] FIG. 2 is a cross-sectional view of the front visor structure 10 taken along the line AA in FIG. As shown in Figures 1 and 2, the base portion 12 includes a U-shaped upper surface portion 12A that forms a planar area extending in the vehicle width direction and the front-to-rear direction, and a front wall portion 12B that extends downward from an outer edge portion 12C of the upper surface portion 12A and forms a planar area extending in the up-down direction. Here, outer edge 12C refers to an edge portion located on the opposite side of upper surface portion 12A to roof portion 3, and can also be said to be an edge portion separated from roof portion 3. On the other hand, inner edge portion 12D of upper surface portion 12A is an edge portion located on the roof portion 3 side of upper surface portion 12A. Base portion 12 abuts against front portion 3F of roof portion 3 at inner edge portion 12D.

[0022] A groove-shaped drip rail portion 13 having an upward opening is formed on the upper surface portion 12A of the base portion 12. The drip rail portion 13 is formed over the entire length of the base portion 12 in the extension direction, and is provided to guide liquid such as rainwater that has flowed down from the roof portion 3 to the side drip rail 6. Specifically, as shown in FIG. 1, the drip rail portion 13 includes a main portion 13A located above the side drip rail, and a flow portion 13B that forms an inclined surface that descends from both ends of the main portion 13A toward the side drip rail 6.

[0023] 1, the main portion 13A is a portion of the drip rail portion 13 that extends to the area spanning the front panel 3B and a portion of the front side of the side panels 3L and 3R. The flow section 13B is a portion of the drip rail portion 13 excluding the main portion 13A, and forms a flow channel that connects both ends of the main portion 13A to the side drip rails 6. Liquid such as rainwater flowing down from the roof portion 3 is received by the main portion 13A of the drip rail portion 13 and guided from the main portion 13A through the flow portion 13B to the side drip rail 6. From the viewpoint of facilitating the flow of liquid to the side drip rail 6, it is preferable that the bottom surface of the main portion 13A be formed as a downwardly sloping surface whose vertical position gradually decreases from the center in the vehicle width direction toward the flow portion 13B.

[0024] 2, the visor portion 11 is disposed forwardly and spaced apart from the front wall portion 12B of the base portion 12. Therefore, a gap communicating in the vertical direction is formed between the visor portion 11 and the front wall portion 12B. This gap between the visor portion 11 and the front wall portion 12B forms a ventilation path through which the traveling wind (indicated by the long dashed arrow in FIG. 2) passes when the truck 1 travels forward. The distance between the visor portion 11 and the front wall portion 12B may be set appropriately in consideration of the ventilation during travel.

[0025] The lower part of the front wall 12B includes a curved surface portion 12E having a curved shape that bulges forward toward the top in a cross section viewed from the side along the vehicle width direction. The curved surface shape of the curved surface portion 12E is set to a shape that can reduce air resistance during driving (improve aerodynamic performance). The front wall 12B including such a curved surface portion 12E can be said to have a wing cross-sectional shape that can reduce air resistance during driving (improve aerodynamic performance). That is, the gap between the upper part of the visor portion 11 and the front wall 12B and the gap between the lower part of the visor portion 11 and the curved surface portion 12E of the front wall 12B form a straightening portion 18 having a tapered spatial shape to straighten the air passing through the gap between the visor portion 11 and the front wall 12B from the bottom to the top.

[0026] Next, an example of a structure for attaching the front visor structure 10 to the front portion 3F of the roof portion 3 will be described with reference to Fig. 3 and Fig. 4. In Fig. 3 and Fig. 4, the cab 2 and a portion of the front visor structure 10 are omitted, and a portion of the side portion 4 and the front portion 5 are indicated by dashed lines. As shown in FIG. 3, the visor portion 11 and the base portion 12 are attached to the front portion 3F of the roof portion 3 via a front stay 15 (attachment member) and a side stay 16. The front stay 15 is formed of a pipe member extending along the vehicle width direction. The front stay 15 is provided with mounting portions 15A (two are shown in FIG. 3) on each of the left and right sides for mounting the front stay 15 to the front panel 3B. The front stay 15 is fixed to the front panel 3B of the front portion 3F via the mounting portions 15A, for example, by bolting.

[0027] Plate portions 15B (two shown in FIG. 3) for attaching the base portion 12 to the front stay 15 are provided on the inner side of each mounting portion 15A in the vehicle width direction. The base portion 12 is fixed to the plate portions 15B, for example, by bolting. The base portion 12 shown in FIG. 3 is formed by dividing it into three parts: a central part 17A forming the center portion in the vehicle width direction, and left and right side end parts 17B connected to both sides of the central part 17A, and the connection portions between the central part 17A and the side end parts 17B have a continuous shape. The central part 17A and each side end part 17B are fastened together at the plate portions 15B, for example, by bolting. Also, each side end part 17B is fixed to each side panel 3L, 3R of the roof portion 3 via a side stay 16, for example by bolting.

[0028] In the front stay 15, a support portion 15C (mounting member) that supports the visor portion 11 is provided on the inner side of each plate portion 15B in the vehicle width direction. The support portion 15C extends in the vehicle width direction so as to support the visor portion 11 in a linear area extending across the vehicle width direction, and includes four screw fastening portions (four central portions in FIG. 3) arranged side by side in the vehicle width direction. The visor portion 11 is fixed to the support portion 15C of the front stay 15, for example, by bolting.

[0029] 3, the support portion 15C is disposed so as to protrude forward via a bent portion 15D relative to the other portion of the front stay 15 other than the support portion 15C. The dimension by which the support portion 15C protrudes forward may be appropriately set according to the dimension by which the visor portion 11 is spaced forward from the front wall portion 12B of the base portion 12 (i.e., the distance between the visor portion 11 and the front wall portion 12B).

[0030] To attach the front visor structure 10 to the front portion 3F of the roof portion 3, first, the front stay 15 is fixed to the front panel 3B of the roof portion 3 via the attachment portion 15A, and the side stay 16 is fixed to the side panels 3L, 3R of the roof portion 3. Next, the center part 17A and each side end part 17B constituting the base portion 12 are fastened together to the plate portion 15B of the front stay 15, and each side end part 17B is fixed to the side stay 16.

[0031] 3 and 4, a slit 17C corresponding to the bent portion 15D is formed on the lower end side of the central part 17A (base portion 12). Therefore, when the base portion 12 is attached to the plate portion 15B of the front stay 15, the bent portion 15D of the front stay 15 is inserted into the slit 17C of the central part 17A (base portion 12), and the support portion 15C is exposed forward of the front wall portion 12B of the central part 17A (base portion 12), as shown in FIG. 4. The visor portion 11 is attached to the support portion 15C exposed forward of the front wall portion 12B of the base portion 12 in this manner. The front stay 15 has a portion other than the support portion 15C covered by the base portion 12.

[0032] FIG. 5 is an explanatory diagram showing an enlarged view of the base portion 12 near the left corner portion of the cab 2, and is a perspective view of the left corner portion of the cab 2 from the front upper side. As shown in FIG. 5, the main portion 13A of the drip rail portion 13 includes a step portion 13D in which the height of the bottom surface of the main portion 13A decreases in a stepped manner from the left corner portion of the cab 2 toward the rear, which is the flow portion 13B side. The step portion 13D shown in FIG. 5 has three steps. Although not shown, a step portion 13D similar to the left side may be provided on the right side of the drip rail portion 13.

[0033] [2. Effects] The front visor structure 10 according to the present embodiment described above provides the following advantageous effects. The front visor structure 10 according to this embodiment includes a visor portion 11 and a base portion 12, and a drip rail portion 13 for guiding liquid such as rainwater to the side drip rail 6 is provided on the upper surface portion 12A of the base portion 12, and a rectifying portion 18 for rectifying air passing through the gap between the front wall portion 12B and the visor portion 11 from below to above is provided. Therefore, liquid such as rainwater flowing down from the roof portion 3 is drained to the side drip rail 6 by the drip rail portion 13, and the rectifying portion 18 rectifies the running wind during driving. Therefore, the aerodynamic performance can be improved while ensuring the drainage of liquids such as rainwater.

[0034] In addition, the drip rail section 13 includes a main section 13A disposed above the side drip rail 6 and a flow section 13B that forms an inclined surface that descends from the end of the main section 13A toward the side drip rail 6, so that liquid such as rainwater that flows down from the roof section 3 to the main section 13A is reliably guided to the side drip rail 6 through the flow section 13B. This ensures that liquid such as rainwater can be drained.

[0035] In addition, the drip rail section 13 includes a step section 13D in which the height of the bottom surface of the drip rail section 13 decreases in a stepped manner from the main section 13A toward the flow section 13B, so that the step section 13D prevents liquid such as rainwater flowing inside the main section 13A (drip rail section 13) toward the side drip rail 6 from flowing back during braking, for example. This makes it possible to more reliably ensure the drainage of liquid such as rainwater. In addition, since the bottom surface of the main portion 13A slopes downward from the center in the vehicle width direction toward the outflow portion 13B, liquid such as rainwater can be easily drained from the main portion 13A to the side drip rail 6.

[0036] The lower portion of front wall portion 12B of base portion 12 includes curved portion 12E which, in a cross section viewed from the side along the vehicle width direction as shown in FIG. 2, has a curved shape which bulges forward as it extends upward. Therefore, the curved shape of curved portion 12E further improves the aerodynamic performance of airflow straightening portion 18 during driving.

[0037] [3.Other] The front visor structure 10 is not limited to the above-mentioned structure. For example, the base portion 12 is not limited to a structure extending across the front panel 3B and a portion of the front side of the side panels 3L, 3R as shown in Fig. 1, so long as the end of the drip rail portion 13 is connected to the side drip rail 6. For example, the base portion 12 may extend to an area corresponding to the front panel 3B, and may not extend to the side panels 3L, 3R. In addition, the cross section of the upper surface portion 12A is not limited to a U-shape, and may be an L-shaped cross section or other structure that allows running water such as rainwater to flow.

[0038] The upper surface of the base portion 12, i.e., the main portion 13A of the drip rail portion 13, is not limited to being disposed above the side drip rail 6, but may be disposed at approximately the same height as the side drip rail 6. In this case, the drip rail portion 13 does not have a flow-down portion, and both ends of the main portion 13A are directly connected to the side drip rail 6. In addition, the main portion 13A of the drip rail portion 13 may not be provided with a step portion 13D, and the bottom surface of the main portion 13A may have a structure in which there is no change in height (no downward inclination) from the center portion in the vehicle width direction to the flow-down portion 13B. In addition, the shape of the front wall portion 12B of the base portion 12 does not have to be a curved shape as long as it does not impede aerodynamic performance.

[0039] Furthermore, the cab 2 to which the front visor structure 10 is applied is not limited to a super high roof type cab as shown in FIG. 1, but may be a normal cab having a roof portion lower in height than a super high roof type cab. Further, the vehicle type to which the front visor structure 10 is applied is not limited to the truck 1 as shown in FIG. 1, but may be any type of vehicle, such as a bus or a passenger car, as long as it has a roof portion.

[0040] Below, supplementary notes regarding this embodiment will be disclosed. [Appendix 1] A front visor structure disposed at a front portion of a roof portion of a cab of a vehicle, a base portion having an upper surface portion that is attached in a strip shape along the vehicle width direction to the front portion of the roof portion and forms a planar area extending in the vehicle width direction and the front-rear direction, and a front wall portion that extends downward from an outer edge portion of the upper surface portion on the opposite side to the roof portion and forms a planar area extending in the up-down direction; a visor portion that is disposed forwardly and spaced apart from the front wall portion of the base portion, is attached to the front portion of the roof portion via an attachment member, and extends forwardly from the front portion of the roof portion in a visor shape; a drip rail portion formed in the upper surface portion of the base portion so as to extend along the vehicle width direction and have an upward opening, the drip rail portion being for guiding liquid to a side drip rail provided at a boundary between a side portion of the cab and the roof portion; and a straightening portion for straightening the air passing through the gap between the front wall portion and the visor portion from below to above. A front visor structure comprising: [Appendix 2] The drip rail portion includes a main portion disposed above the side drip rail, and a flow lower portion that forms an inclined surface that descends from an end of the main portion toward the side drip rail. 2. A front visor structure according to claim 1. [Appendix 3] The drip rail portion includes a step portion in which the height of the bottom surface of the drip rail portion decreases in a stepped manner from the main portion toward the flow lower portion. 3. A front visor structure according to claim 2, [Appendix 4] The bottom surface of the main portion is inclined downward from the center portion in the vehicle width direction toward the flow lower portion. 4. The front visor structure according to claim 2 or 3. [Appendix 5] The lower portion of the front wall of the base portion includes a curved surface portion that bulges forward as it extends upward in a cross section viewed from the side along the vehicle width direction. 2. A front visor structure according to claim 1. [Explanation of symbols]

[0041] 1 Truck (vehicle) 1A Bodywork 2 Cab 3 Roof section 3A Center Panel 3B Front Panel 3L Side Panel 3R side panel 3F Front 4 Side part 4A Door 5 Front part 5A Windshield 5L Front pillar 5R Front pillar 6 Side drip rail 10 Front visor structure 11 Visor section 12 Base section 12A Top part 12B Front wall 12C Outer edge 12D inner edge 12E Curved section 13 Drip rail section 13A Main section 13B Downstream part 13D Step 15 Front stay (mounting part) 15A Mounting part 15B Plate section 15C Support part (mounting part) 15D bent part 16 Side stay 17A Center part 17B Side end parts 17C Slit 18 Rectifier

Claims

1. A front visor structure disposed at a front portion of a roof portion of a cab of a vehicle, a base portion having an upper surface portion that is attached in a strip shape along the vehicle width direction to the front portion of the roof portion and forms a planar area extending in the vehicle width direction and the front-rear direction, and a front wall portion that extends downward from an outer edge portion of the upper surface portion on the opposite side to the roof portion and forms a planar area extending in the up-down direction; a visor portion that is disposed forwardly and spaced apart from the front wall portion of the base portion, is attached to the front portion of the roof portion via an attachment member, and extends forwardly from the front portion of the roof portion in a visor shape; a drip rail portion formed in the upper surface portion of the base portion so as to extend along the vehicle width direction and have an upward opening, the drip rail portion being for guiding liquid to a side drip rail provided at a boundary between a side portion of the cab and the roof portion; and a straightening portion for straightening the air passing through the gap between the front wall portion and the visor portion from below to above. A front visor structure comprising:

2. The drip rail portion includes a main portion disposed above the side drip rail, and a flow lower portion that forms an inclined surface that descends from an end of the main portion toward the side drip rail. The front visor structure according to claim 1 .

3. The drip rail portion includes a step portion in which the height of the bottom surface of the drip rail portion decreases in a stepped manner from the main portion toward the flow lower portion. The front visor structure according to claim 2 .

4. The bottom surface of the main portion is inclined downward from the center portion in the vehicle width direction toward the flow lower portion. The front visor structure according to claim 2 or 3.

5. The lower portion of the front wall of the base portion includes a curved surface portion that bulges forward as it extends upward in a cross section viewed from the side along the vehicle width direction. The front visor structure according to claim 1 .

Images