JP2017218119A - Rear face part structure of cab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent breakage of a rear mount rail by a load from the upper part of a cab.SOLUTION: In a rear face part structure of a cab, a rear cab mount rail 15 comprises: a mount bracket fixation part 18 which is supported via a rear cab mount bracket 6 by a rear cab mount 5 from a lower side; and an area 20 to be supported including the mount bracket fixation part 18, and extends in a vehicle width direction at a rear end lower part of a cab body 11. Length of the area 20 to be supported in the vehicle width direction is approximately the same as length L of the mount bracket fixation part 18 in the vehicle width direction. A cab back panel 34 is erected at the rear end of the cab body 11 along the rear cab mount rail 15. A back panel reinforcement 36 includes a widening lower end part 36a formed in a widening shape in which length thereof in the vehicle width direction is gradually increased toward a lower part. The widening lower end part 36a includes a lower end edge part 24 connected with a rear part area 22 of a rear plate part 15c of the rear cab mount rail 15.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a structure of a rear surface portion of a cab of a vehicle.

  Patent Document 1 describes a cab back panel. A center beam, which is a reinforcing member having a U-shaped cross section, is disposed at a substantially central portion in the left-right direction of the back panel. The center beam has an upper end fixed to the cantilever back on the rear side of the roof panel of the cab, and a lower end fixed to the rear mount rail and is fixed to the back panel side. FIG. 7 of the publication shows a state in which the lower end of the center beam is joined to the rear mount rail between the left and right underframes.

JP-A-11-165659

  In the cab described in Patent Document 1, since the lower end of the center beam is fixed to the rear mount rail, when a load is input downward from the roof panel side of the cab (hereinafter simply referred to as load input), the load is Input from the roof panel to the lower rear mounting rail via the center beam. Since the joint between the center beam and the rear mount rail is placed between the left and right underframes, stress is concentrated on the joint between the center beam and the rear mount rail when a load is input, and the rear mount rail is centered. There is a risk of damage at the joint with the beam.

  Therefore, an object of the present invention is to provide a rear surface structure of a cab that can prevent a rear mount rail from being damaged by a load from above the cab.

  In order to solve the above problems, the present invention provides a rear surface structure of a cab of a vehicle in which a rear end portion of the cab is supported from below on a vehicle body frame via a rear cab mount, and includes a rear mount rail, a back panel, a rain With force. The rear mount rail has a supported surface portion supported from below by the rear cab mount, and extends in the vehicle width direction at the lower portion of the rear end of the cab. The back panel defines the rear of the cab while standing along the rear mount rail at the rear end of the cab. Reinforce has a widened lower end with a widened shape that gradually increases in the vehicle width direction as it goes downward, extends vertically on the front side of the back panel, and is fixed to the front of the back panel. Reinforce. The rear mount rail has a supported region including a supported surface portion within a predetermined range in the vehicle width direction. The length of the supported region of the rear mount rail in the vehicle width direction is substantially the same as the length of the supported surface portion in the vehicle width direction. The widened lower end portion of the reinforcement has a lower end edge portion fixed to the supported region of the rear mount rail.

  In the above configuration, the supported surface portion of the rear mount rail is supported by the rear cab mount from below, so that the support force from below by the rear cab mount is strong. The supported area of the rear mount rail is an area including a supported surface portion within a predetermined range in the vehicle width direction of the rear mount rail, and the length of the supported area in the vehicle width direction is It is substantially the same as the length of the surface portion in the vehicle width direction. Accordingly, the supported area of the rear mount rail has a stronger support force from below by the rear cab mount than the other areas of the rear mount rail.

  In addition, since the lower edge of the widened lower end of the reinforcement is fixed to the supported area of the rear mount rail, when a load is input to the reinforcement from above the cab (hereinafter simply referred to as load input) The load is transmitted from the lower end edge of the reinforcement to the supported area of the rear mount rail. In this way, the load from the rain force is transmitted to the supported area of the rear mount rail where the rear cab mount has a strong support force from below, preventing the rear mount rail from being bent by the load from the rain force. Thus, damage to the rear mount rail can be prevented.

  In addition, the widening lower end of the reinforcement has a widening shape in which the length in the vehicle width direction gradually increases as it goes downward, so the load transmitted from the reinforcement to the rear mount rail when the load is input Can be dispersed. For this reason, concentration of stress on the rear mount rail can be prevented, and breakage of the rear mount rail can be prevented.

  Further, the length in the vehicle width direction of the lower end edge of the widened lower end of the reinforcement may be substantially the same as the length in the vehicle width direction of the supported region of the rear mount rail.

  In the above configuration, the length in the vehicle width direction of the lower end edge of the widened lower end portion of the reinforcement is substantially the same as the length in the vehicle width direction of the supported region of the rear mount rail. Therefore, the load from the rain force is transmitted to the supported area where the rear cab mount has a strong support force from below, and the length of the supported area of the rear mount rail in the vehicle width direction is utilized to the maximum. The load transmitted to the rear mount rail can be distributed in the vehicle width direction, the stress concentration of the rear mount rail can be prevented, and the rear mount rail can be prevented from being damaged.

  According to the present invention, it is possible to prevent the rear mount rail from being damaged by a load from above the cab.

1 is an external perspective view of a vehicle according to an embodiment of the present invention. It is the schematic of the rear surface part of a cab. It is a perspective view of the rear surface part of a cab. It is the schematic which looked at the rear surface part of the cab from the compartment side. It is an enlarged view of the principal part of FIG. It is the schematic of the principal part of the rear surface part of a cab. It is the schematic which looked at FIG. 4 from the VII direction.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each figure, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. Moreover, in the following description, the left-right direction means the left-right direction with the vehicle facing forward.

  As shown in FIG. 1, the rear surface structure of the cab according to the present embodiment is a high roof type in which the roof panel 30 of the cab 10 is bulged upward to enlarge the internal space (vehicle compartment 7) of the cab 10 upward. This is applied to the cab 10 of the truck (vehicle) 1.

  As shown in FIG. 2, the truck 1 has a pair of left and right side members 2 extending across the front and rear of the vehicle, and a plurality of cross members 3 extending in the vehicle width direction and connecting the left and right side members 2 to each other. . The left and right side members 2 and the plurality of cross members 3 constitute a vehicle body frame 4 of the truck 1. The lower portion of the front end of the cab 10 is rotatably supported by the front end portion of the vehicle body frame 4 via a front cab mount (not shown). The rear end of the cab 10 is supported from below by the vehicle body frame 4 via a rear cab mount 5 fixed to the left and right side members 2. The rear cab mount 5 has a cushion rubber (not shown) on its upper surface, and elastically supports a rear cab mount bracket 6 described later via the cushion rubber from below. In FIG. 2, only one cross member 3 is shown.

  The cab 10 includes a cab main body 11 and a high roof portion 12 that is disposed above the cab main body 11 and expands the internal space of the cab 10 upward, and is disposed above the front portion of the vehicle body frame 4 of the truck 1. .

  As shown in FIGS. 2 to 4, the cab main body 11 is obtained by removing the high roof portion 12 from the cab 10 of a high roof type vehicle, and includes a cab main body bottom surface portion 11 a that defines a lower portion of the cab main body 11, and a cab. A cab body front surface portion 11 b that partitions the front of the main body 11, a pair of left and right cab body side portions 11 c that partitions the side of the cab body 11, and a cab body rear surface portion 11 d that partitions the rear of the cab body 11. .

  The cab main body bottom surface portion 11 a includes a floor panel 13 that intersects with the vertical direction below the passenger compartment 7, and a pair of left and right cab underframes 16 that extend in the front-rear direction below the floor panel 13. Partition. The left and right cab under frames 16 are joined to the lower surface of the floor panel 13. The floor panel 13 has a rear cab mount rail (rear mount rail) 15.

  As shown in FIGS. 5 and 7, the rear cab mount rail 15 is formed by bending so that the rear end side of the floor panel 13 protrudes upward, and at the lower rear end of the cab body 11 (see FIG. 4). The rear end edge of a certain floor panel 13 extends in the vehicle width direction, and the rigidity of the rear end edge of the floor panel 13 is ensured. The rear cab mount rail 15 includes a front plate portion 15a standing at the rear end portion of the floor panel 13, an upper plate portion 15b that bends from the upper edge of the front plate portion 15a and extends rearward, and a rear end of the upper plate portion 15b. The rear plate portion 15c is bent from the edge and extends downward, and the protruding plate portion 15d is bent from the lower end edge of the rear plate portion 15c and protrudes backward, and is formed in an open cross-sectional shape that opens downward. A space 8 is defined inside. The upper plate portion 15b of the rear cab mount rail 15 has a pair of left and right mount bracket fixing portions (supported portions) 18 (see FIG. 2). A pair of left and right rear cab mount brackets 6 are arranged below the left and right mount bracket fixing portions 18 and fixed to the left and right mount bracket fixing portions 18. Note that the left and right mount bracket fixing portions 18 and the left and right rear cab mount brackets 6 are provided symmetrically on the rear cab mount rail 15 and have substantially the same configuration. The description of is omitted.

  As shown in FIGS. 3 and 5, the rear cab mount bracket 6 is formed by a plate body in a frame shape penetrating in the front-rear direction, and a locking device (see FIG. 2) that can lock the rear cab mount 5 (see FIG. 2). (Not shown). The rear cab mount bracket 6 includes an upper plate portion 6a that is fixed to the mount bracket fixing portion 18 of the rear cab mount rail 15 in surface contact from below, and a lower plate portion 6b that is supported by the rear cab mount 5 from below. And is disposed in the space 8 below the rear cab mount rail 15. That is, the mount bracket fixing portion 18 of the rear cab mount rail 15 is supported from below by the rear cab mount 5 via the rear cab mount bracket 6, and the rear end portion of the cab 10 is connected to the vehicle body frame via the rear cab mount 5. 4 is supported from below.

  The mount bracket fixing portion 18 of the rear cab mount rail 15 is such that the upper plate portion 6a of the rear cab mount bracket 6 is in surface contact with the lower cab mount bracket 15 through the rear cab mount bracket 6 through the rear cab mount bracket 6. The rear cab mount 5 is supported from below, and the length of the mount bracket fixing portion 18 in the vehicle width direction is substantially the same as the length of the upper plate portion 6a of the rear cab mount bracket 6 in the vehicle width direction. In the present invention, “substantially the same” is a concept including not only completely the same but also a slightly different state due to an error in manufacturing.

  As shown in FIGS. 5 to 7, the rear cab mount rail 15 has a supported region 20 including a mount bracket fixing portion 18 within a predetermined range in the vehicle width direction. The supported region 20 of the rear cab mount rail 15 is a region in which the support force from the rear cab mount 5 is relatively stronger than other regions, and includes a mount bracket fixing portion 18, a front region 21, and a rear region 22. Have. The front region 21 has a length in the vehicle width direction substantially the same as a length L (see FIG. 6) in the vehicle width direction of the mount bracket fixing portion 18, and is mounted on the front plate portion 15 a of the rear cab mount rail 15. This is an area extending downward from the front end edge of the bracket fixing portion 18. The rear region 22 has a length in the vehicle width direction substantially the same as a length L in the vehicle width direction of the mount bracket fixing portion 18, and is located behind the mount bracket fixing portion 18 in the rear plate portion 15 c of the rear cab mount rail 15. It is an area extending downward from the edge. That is, the length of the predetermined range, which is the length of the supported region 20 in the vehicle width direction, is substantially the same as the length L of the mount bracket fixing portion 18 in the vehicle width direction.

  As shown in FIGS. 2 to 4, the cab body rear surface portion 11 d includes a cab back panel (back panel) 34, a roof back rail 35, and a pair of left and right back panel reinforcements (reinforce) 36. The left and right back panel reinforcements 36 are provided symmetrically on the left and right sides of the track 1 and have substantially the same configuration. Therefore, the left side will be described below, and the description on the right side will be omitted.

  The cab back panel 34 is a plate body that defines the rear of the cab body 11, and stands at the rear end of the cab body 11 along the rear cab mount rail 15. The lower end edge portion of the cab back panel 34 is disposed behind the rear plate portion 15c of the rear cab mount rail 15 and joined to the rear plate portion 15c (see FIG. 7). The roof back rail 35 is fixed to the front surface 23 of the upper edge 34a of the cab back panel 34, extends in the vehicle width direction, is formed in a cross-sectional hat shape protruding forward, and forms a closed space between the cab back panel 34 and the cab back panel 34. The upper end edge 34a of the cab back panel 34 is reinforced.

  As shown in FIGS. 4 to 7, the back panel reinforcement 36 is fixed to the front surface 23 of the cab back panel 34, extends in the vertical direction above the mounting bracket fixing portion 18, and has a cross-sectional hat shape protruding forward. Thus, a closed space 27 is formed between the cab back panel 34 and the cab back panel 34 is reinforced. The center line in the vehicle width direction of the back panel reinforcement 36 is substantially the same position in the vehicle width direction as the center line in the vehicle width direction of the supported region 20 of the rear cab mount rail 15 (indicated by a two-dot chain line 9 in FIG. 6). Position). A closed space 27 formed between the back panel reinforcement 36 and the cab back panel 34 is disposed above the mount bracket fixing portion 18 in the vertical direction and extends in the vertical direction. The front surface 25 of the back panel reinforcement 36 is disposed behind the front plate portion 15 a of the rear cab mount rail 15. The back panel reinforcement 36 has, at its lower end, a widened lower end 36a formed in a widened shape whose length in the vehicle width direction gradually increases as it goes downward.

  The widened lower end portion 36a of the back panel reinforcement 36 is disposed at the rear of the rear plate portion 15c of the rear cab mount rail 15 and joined in a state of surface contact with the rear region 22 of the rear plate portion 15c. Part 24. Above the upper end 26 (the position indicated by the alternate long and short dash line 28 in FIG. 6) of the widened lower end portion 36a of the back panel reinforcement 36, the length in the vehicle width direction is substantially the same and extends in the vertical direction. It is joined to the roof back rail 35. The front surface 25 of the back panel reinforcement 36 is inclined and extends from the upper side toward the lower end edge 24 at the rear lower side at the widened lower end 36a. That is, the widened lower end portion 36 a of the back panel reinforcement 36 is formed so that the thickness in the front-rear direction becomes thinner as it goes downward, and becomes flat at the lower end edge portion 24. The length in the vehicle width direction of the closed cross section between the upper end 26 of the widened lower end portion 36a and the cab back panel 34 is shorter than the length L of the supported region 20 of the rear cab mount rail 15 in the vehicle width direction. The vehicle width direction length of the lower end edge 24 of the widened lower end portion 36a is substantially the same as the length L of the supported region 20 of the rear cab mount rail 15 in the vehicle width direction. The lower end edge of the cab back panel 34 is disposed behind the lower end edge 24 of the widened lower end 36a, and the lower end edge 24 of the widened lower end 36a and the lower end edge of the cab back panel 34 overlap in the front-rear direction. In this state, the rear cab mount rail 15 is joined to the rear region 22 of the rear plate portion 15c. Further, the widened lower end portion 36 a of the back panel reinforcement 36 is fixed to the mount bracket fixing portion 18 via an L-shaped bracket 37.

  The bracket 37 integrally includes a vertical plate portion 37a that extends in the vertical direction in a side view of the vehicle and a front plate portion 37b that bends from the lower end of the vertical plate portion 37a and extends forward. The upper end portion of the vertical plate portion 37 a is fixed to the front surface 25 of the back panel reinforcement 36, and the lower end of the vertical plate portion 37 a is in contact with the upper surface of the mount bracket fixing portion 18. The front plate portion 37 b extends along the upper surface of the mount bracket fixing portion 18 and is fixed to the mount bracket fixing portion 18. Note that the shape of the bracket 37 is not limited to a substantially L-shape, and other shapes are possible as long as one end is fixed to the back panel reinforcement 36 and the other end is fixed to the supported region 20 of the rear cab mount rail 15. It may be.

  As shown in FIGS. 3 and 4, the high roof portion 12 includes a resin roof panel 30 that bulges upward so as to expand the internal space of the cab 10, and a plurality of (this embodiment) that reinforces the roof panel 30. In the embodiment, it is formed by four roof reinforcements 38, 39, 40, and 41. The high roof portion 12 is disposed above the cab body 11 so as to cover the cab body 11 from above, and is fixed to the cab body 11.

  The roof panel 30 integrally includes a panel front surface portion 30a, a panel upper surface portion 30b, left and right panel side surface portions 30c, 30d, and a panel rear surface portion 30e, and defines a space 31 opened downward. The panel front surface portion 30a has a lower end edge fixed to an upper end edge of the cab main body front surface portion 11b, and continuously extends from the upper end edge of the cab main body front surface portion 11b so as to be inclined rearward and upward. Partition. The panel upper surface portion 30b bends from the upper edge of the panel front surface portion 30a and extends rearward, and defines the upper portion of the high roof portion 12. The left and right panel side surface portions 30c and 30d are bent from both ends in the vehicle width direction of the panel upper surface portion 30b and extend downward, and the lower end edge portions are fixed to the upper end edge portions of the left and right cab body side surface portions 11c. Twelve sides in the vehicle width direction are defined. The panel rear surface portion 30e is bent from the rear end edge of the panel upper surface portion 30b and extends downward, and the lower end edge portion thereof is fixed to the roof back rail 35, and defines the rear of the high roof portion 12.

  The plurality of roof reinforcements 38 to 41 are front and rear roof reinforcements 38 and 39 having a substantially inverted U shape, and left and right roof reinforcements 40 and 41 having a substantially inverted L shape, each having a hat shape in cross section. It is formed. The front and rear roof reinforcements 38 and 39 are fixed to the panel upper surface portion 30b and the left and right panel side surface portions 30c and 30d of the roof panel 30, and are closed between the panel upper surface portion 30b and the left and right panel side surface portions 30c and 30d. A cross section is formed to reinforce the panel upper surface portion 30b and the left and right panel side surface portions 30c, 30d. The left and right roof reinforcements 40 and 41 are fixed to the panel upper surface portion 30b and the panel rear surface portion 30e of the roof panel 30, and form a closed cross section between the panel upper surface portion 30b and the panel rear surface portion 30e. 30b and the panel rear surface part 30e are reinforced. The left and right roof reinforcements 40, 41 are fixed to the rear roof reinforcement 39 and extend upwardly from the rear roof reinforcement 39 along the lower surface of the panel upper surface 30b in a straight line to the rear. And rear surface reinforcing portions 40b and 41b which are bent from the rear ends of the upper surface reinforcing portions 40a and 41a and extend linearly downward along the front surface of the panel rear surface portion 30e. The lower end portions of the rear reinforcing portions 40 b and 41 b of the left and right roof reinforcements 40 and 41 are fixed to the roof back rail 35 and are continued to the upper end portions of the left and right back panel reinforcements 36 via the roof back rail 35. In other words, the rear reinforcing portions 40b and 41b of the left and right roof reinforcements 40 and 41 and the left and right back panel reinforcements 36 extend in a straight line along the vertical direction.

  In the cab 10 configured as described above, the mount bracket fixing portion 18 of the rear cab mount rail 15 is supported from below by the rear cab mount 5 via the rear cab mount bracket 6. Strong support from. The supported area 20 of the rear cab mount rail 15 is an area including the mount bracket fixing portion 18 within a predetermined range in the vehicle width direction of the rear cab mount rail 15, and the vehicle width of the supported area 20. Since the length in the direction is substantially the same as the length in the vehicle width direction of the mount bracket fixing portion 18, the support force from the rear cab mount 5 is relatively stronger than the other areas of the rear cab mount rail 15.

  Further, the lower end edge 24 of the widened lower end 36 a of the back panel reinforcement 36 is joined to the rear region 22 of the rear plate portion 15 c in the supported region 20 of the rear cab mount rail 15. Therefore, when a load is input to the back panel reinforcement 36 from above the cab 10 via the roof reinforcements 40b and 41b of the roof reinforcements 40 and 41 and the roof back rail 35 (hereinafter simply referred to as load input). In addition, the load is transmitted from the lower edge 24 of the widened lower end 36 a of the back panel reinforcement 36 to the supported region 20 of the rear cab mount rail 15.

  Further, the widened lower end portion 36 a of the back panel reinforcement 36 is fixed to the mount bracket fixing portion 18 via an L-shaped bracket 37. For this reason, when the load is input, the load is transmitted from the widened lower end portion 36 a of the back panel reinforcement 36 to the mount bracket fixing portion 18 via the bracket 37.

  In this way, when the load is input, the load from the back panel reinforcement 36 is transmitted to the supported region 20 of the rear cab mount rail 15 where the rear cab mount 5 has a strong support force from below. It is possible to prevent the rear cab mount rail 15 from being bent by a load from the reinforcement 36 and prevent the rear cab mount rail 15 from being damaged.

  Further, the widening lower end portion 36a of the back panel reinforcement 36 has a widening shape in which the length in the vehicle width direction gradually increases toward the lower side. Therefore, when the load is input, the rear cab mount rail 15 extends from the back panel reinforcement 36. The load transmitted to the vehicle can be dispersed in the vehicle width direction. For this reason, concentration of stress on the rear cab mount rail 15 can be prevented, and damage to the rear cab mount rail 15 can be prevented.

  Further, the length in the vehicle width direction of the lower end edge portion 24 of the widened lower end portion 36 a of the back panel reinforcement 36 is substantially the same as the length L in the vehicle width direction of the supported region 20 of the rear cab mount rail 15. Therefore, when the load is input, the load from the back panel reinforcement 36 is transmitted to the supported region 20 having a strong supporting force from below, and the supported region 20 of the rear cab mount rail 15 is maximized in the vehicle width direction. It is possible to disperse the load in the vehicle width direction by utilizing the above, and it is possible to prevent the concentration of stress on the rear cab mount rail 15 and to prevent the rear cab mount rail 15 from being damaged.

  Therefore, according to this embodiment, it is possible to prevent the rear cab mount rail 15 from being damaged by a load from above the cab 10.

  In the present embodiment, the rear cab mount rail 15 is constituted by the front plate portion 15a, the upper plate portion 15b, the rear plate portion 15c, and the protruding plate portion 15d. However, the present invention is not limited to this. Any other configuration may be used as long as it is a rear cab mount rail that extends in the vehicle width direction at the lower portion of the rear end and is supported by the rear cab mount 5 from below. For example, the rear cab mount rail may be a cylindrical body such as a rectangular cross section that is fixed to the rear edge of the floor panel 13 and extends in the vehicle width direction.

  In the present embodiment, the rear cab mount bracket 6 is fixed to the mount bracket fixing portion 18 of the rear cab mount rail 15, so that the mount bracket fixing portion 18 is lowered to the rear cab mount 5 via the rear cab mount bracket 6. The mount bracket fixing portion 18 functions as a supported surface portion, but is not limited to this. For example, a predetermined region of the rear cab mount rail 15 may be supported directly from below by a cushion rubber of the rear cab mount 5, and the predetermined region may function as a supported surface portion. In this case, the portion of the rear cab mount rail 15 that is in contact with the cushion rubber of the rear cab mount 5 is the supported surface portion, and the length in the vehicle width direction of the predetermined region is the vehicle width direction of the supported region 20. Is the length of

  Further, in the present embodiment, the widened lower end portion 36a of the back panel reinforcement 36 is formed so that the thickness in the front-rear direction decreases as it goes downward, but the present invention is not limited to this. For example, the widened lower end portion 36a may be formed so that the thickness in the front-rear direction is substantially the same in the vertical direction, or so that the thickness in the front-rear direction increases as it goes downward. Good. In this case, the shape of the lower end edge portion 24 of the widened lower end portion 36a is not limited to a flat plate shape, and may be another shape.

  Further, the shape of the back panel reinforcement 36 is not limited to a cross-sectional hat shape, and may be another shape.

  In the present embodiment, the lower edge 24 of the widened lower end 36a of the back panel reinforcement 36 is joined to the rear region 22 of the supported region 20 of the rear cab mount rail 15. However, the present invention is not limited to this. Instead, it may be fixed to other parts of the supported area 20 (such as the mount bracket fixing portion 18 and the front area 21). In the present embodiment, the bracket 37 is fixed to the mount bracket fixing portion 18 of the supported region 20 of the rear cab mount rail 15, but the present invention is not limited to this, and other parts of the supported region 20 ( The front region 21 and the rear region 22 may be fixed.

  In the present embodiment, the length in the vehicle width direction of the lower edge 24 of the widened lower end portion 36a is substantially the same as the length in the vehicle width direction of the supported region 20 of the rear cab mount rail 15. It is not limited and may be longer or shorter than the length of the supported region 20 in the vehicle width direction.

  In the present embodiment, the center line in the vehicle width direction of the back panel reinforcement 36 is disposed at substantially the same position in the vehicle width direction as the center line in the vehicle width direction of the supported region 20 of the rear cab mount rail 15. However, the present invention is not limited to this. For example, even if the center line in the vehicle width direction of the back panel reinforcement 36 and the center line in the vehicle width direction of the supported region 20 of the rear cab mount rail 15 are arranged at different positions in the vehicle width direction, the back panel rain The lower end edge 24 of the widened lower end 36 a of the force 36 may be fixed to the supported region 20 of the rear cab mount rail 15.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to the content of the said embodiment, Of course, it can change suitably in the range which does not deviate from this invention. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  For example, in the above embodiment, the rear surface structure of the cab according to the present invention is applied to the cab 10 of the high roof type truck 1, but the present invention is not limited to this, and a normal roof height truck that is not a high roof type is used. The present invention may be applied to a cab such as a tractor that pulls a trailer.

1: Truck (vehicle)
4: Body frame 5: Rear cab mount 10: Cab 15: Rear cab mount rail (rear mount rail)
18: Mount bracket fixing part (supported surface part)
20: Supported area 23: Front surface of cab back panel 24: Lower edge of widened lower end of back panel reinforcement 34: Cab back panel (back panel)
36: Back Panel Reinforce (Rainforce)
36a: widening lower end of back panel reinforcement

Claims (2)

A rear surface structure of a cab of a vehicle in which a rear end portion of the cab is supported from below by a vehicle body frame via a rear cab mount,
A rear mount rail having a supported surface portion supported from below by the rear cab mount, and extending in a vehicle width direction at a lower rear end of the cab;
A back panel that partitions the rear of the cab while standing along the rear mount rail at the rear end of the cab;
The back panel has a widened lower end with a widened shape in which the length in the vehicle width direction gradually increases toward the lower side, extends vertically on the front side of the back panel, and is fixed to the front surface of the back panel. Reinforcement that reinforces,
The rear mount rail has a supported region including the supported surface portion within a predetermined range in the vehicle width direction,
The length in the vehicle width direction of the supported region of the rear mount rail is substantially the same as the length in the vehicle width direction of the supported surface portion,
The rear surface structure of a cab, wherein the widened lower end portion of the reinforcement has a lower end edge portion fixed to the supported region of the rear mount rail. The cab rear surface structure according to claim 1,
The length in the vehicle width direction of the lower end edge of the widened lower end portion of the reinforcement is substantially the same as the length in the vehicle width direction of the supported region of the rear mount rail. Face structure.

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