JP5783446B2 - Cab rear end lower structure - Google Patents

Description

  The present invention relates to a rear end lower structure of a cab that supports a rear end lower portion of a cab having a back panel and a floor panel by being coupled to a cab mount provided on a vehicle body frame.

  Japanese Patent Application Laid-Open No. 2007-223371 describes a cab overtrack in which a front end portion side of a cab is supported so as to be tiltable about a tilt axis with respect to a chassis side. On both the left and right sides in the vehicle width direction on the rear surface of the cab, a cab block device that locks the rear end portion side of the non-tilted cab to the chassis side is fixed. In addition, strikers are respectively fixed to the left and right sides of the chassis corresponding to each cab lock device. A bracket to which the cab lock device is fixed is provided on the back surface of the cab. The bracket has a substantially frame shape, and the cab lock device is fastened and fixed to the bracket in a state where the main part is accommodated inside the bracket. A striker insertion hole through which the striker is inserted when the cab is in a non-tilt state is formed in the lower part of the bracket.

JP 2007-223371 A

  In general, at the lower part of the rear end of the cab of a cab-over type vehicle, the lower end portion of the back panel that forms the back surface of the cab and the rear end portion of the floor panel that forms the bottom surface of the cab are joined by welding or the like. A pair of main sills extending in the front-rear direction on both the left and right sides are fixed to the lower surface of the floor panel, and the surface rigidity of the floor panel is secured by the main sill.

  When fixing the above conventional bracket to the lower rear end of such a cab, the upper part of the bracket (from the upper end of the bracket to the approximate center) is joined to the back of the back panel, and the lower part of the bracket (the approximate center of the bracket) From the bottom to the bottom of the main sill, and the lower end of the bracket is joined to the bottom of the main sill.

  The cab is supported from below on the vehicle body frame by engaging a striker with a cab lock device fixed to the bracket. Accordingly, vibration and the like input from the vehicle body frame (chassis) to the lower portion of the rear end of the cab are input to the back panel and the main sill via the cab block device and the bracket.

  However, the lower part of the bracket is not joined to either the back panel or the main sill. For this reason, in order to ensure sufficient rigidity of the joint between the cab and the bracket against vibration input from the body frame side, the joint between the two (the upper part of the bracket, the lower part of the back panel, the bracket The plate thickness of the lower end and the bottom of the main sill must be increased, resulting in an increase in the weight of the vehicle.

  Accordingly, the present invention provides a rear end lower structure of a cab that can sufficiently secure the rigidity of a joint portion between a bracket to which the cab block device is fixed and the rear end lower portion of the cab while suppressing the weight of the vehicle. The purpose is to provide.

  In order to achieve the above object, according to the present invention, a cab lock device fixed to a lower rear end of a cab having a back panel and a floor panel is engaged from above with a striker of a cab mount provided on a vehicle body frame. The rear end lower structure of the cab that is supported by the vehicle body frame via the cab mount includes a floor recess, a bracket, and a back panel extension.

The floor recess is bent at the upper part of the cab mount in the rear end of the floor panel and is recessed downward. The bracket includes a plate-shaped bracket bottom portion on which a striker insertion portion for inserting the striker is formed and the left and right sides of the bracket bottom portion extending upward from the left and right sides of the bracket and joined to the rear surface of the back panel. It has a joint part on the bracket and is arranged above the cab mount. Back panel extension, extends a vertical plate portion extending downward toward the upper side portion of the floor recess of the lower end portion of the back panel on the upper surface of the floor recess, from the lower end of the vertical plate portion by bending forward, the floor recess and a horizontal plate portion joined overlapping from the top side of the upper surface. Further, the front end edge portion of the bracket bottom portion is joined to the rear surface of the vertical plate portion of the back panel extension portion, and the lower surface of the bracket bottom portion is joined to the upper surface of the floor recess.

In the above configuration, the floor recess, recessed downward is bent formed in the upper portion of the carburetor mount of the rear end portion of the floor panel, a back panel extension, from the upper side portion of the floor recess of the lower end portion of the back panel The bracket has a vertical plate portion extending downward, and the bracket has a plate-like bracket bottom portion and left and right bracket upper joint portions that extend upward from both the left and right sides of the bracket bottom portion and are joined to the rear surface of the back panel. The front edge of the bottom of the bracket is joined to the rear surface of the vertical plate portion of the back panel extension, and the lower surface of the bracket bottom is joined to the upper surface of the floor recess. The upper joint, the front edge of the bottom of the bracket, and the lower surface of the bracket bottom are in contact with the rear surface of the back panel on the cab side, the rear surface of the vertical plate, and the upper surface of the floor recess. They are joined by being. For this reason, an input such as vibration from the vehicle body frame to the lower portion of the rear end of the cab is shared by the joint portion between the bracket and the cab and is input to the cab, thereby increasing the thickness of the joint portion between the two. Without joining, that is, without increasing the weight of the vehicle, sufficient rigidity of the joint portion can be ensured.

  Further, the vertical plate portion of the back panel extension may be joined to the rear end of the floor recess to close the rear of the floor recess.

  In the above configuration, the vertical plate portion of the back panel extension portion closes the rear of the floor recess, so that water and mud can be prevented from entering the cab from outside the cab via the floor recess. In addition, noise outside the cab can be prevented from being transmitted to the cab through the floor recess.

  ADVANTAGE OF THE INVENTION According to this invention, the rigidity of the coupling | bond part of the bracket to which a cab lock apparatus is fixed, and the rear-end lower part of a cab can be fully ensured, suppressing the weight increase of a vehicle.

It is a principal part perspective view of the vehicle concerning one Embodiment of this invention. It is a principal part disassembled perspective view of FIG. It is a perspective view of the floor panel of FIG. FIG. 4 is a sectional view taken along line AA in FIG. 3. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is CC sectional view taken on the line of FIG. FIG. 2 is a perspective view of a back panel and a cab block bracket of FIG. 1. FIG. 2 is a cross-sectional view taken along line DD of the back panel, floor panel, and cab lock bracket of FIG. 1. It is a perspective view of the cab block bracket, cab block device, and rear cab block mount of FIG.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the drawing, the arrow FR indicates the front of the vehicle, the arrow UP indicates the upper side, and the arrow IN indicates the inner side in the vehicle width direction. In the following description, front and rear means front and rear of the vehicle, and left and right mean left and right in a state of facing the front of the vehicle. The vehicle of this embodiment has the same structure on the left and right, and FIG. 7 shows the back panel and cab bracket on the left side of the vehicle, and FIG. 9 shows the cab block bracket, cab block device and rear cab block mount on the right side of the vehicle. Is shown.

  As shown in FIG. 1, the rear lower structure 1 of the cab according to the present embodiment includes a cab block device 70 fixed to a lower rear end of a cab 3 having a back panel 14 and a floor panel 13. By engaging with a striker 52 (see FIG. 2) of the rear cab mount (cab mount) 5 provided from above, the cab 3 is supported on the vehicle body frame 4 via the rear cab mount 5.

  The vehicle 2 is a cab-over type truck in which an engine room 9 is located below the cab 3. The cab 3 is supported by a front cab mount (not shown) and a rear cab mount 5 attached to a front end portion of the vehicle body frame 4 so as to be tiltable forward.

  The vehicle body frame 4 includes left and right main beams 6 extending in parallel in the front-rear direction, a plurality of cross members 7, a front cab mount, and a rear cab mount 5. The left and right main beams 6 are connected to each other by a plurality of orthogonal cross members 7. A traveling axle (not shown) is provided near the front end and the rear end of the body frame 4. The traveling wheels 8 are rotatably supported at both ends of the traveling axle in the vehicle width direction.

  As shown in FIGS. 1 and 2, the rear cab mount 5 includes a rear arch 51 that is an arch-like body, and a striker 52. The rear arch 51 is coupled to the outer surface portion of the main beam 6 and extends upward to a pair of rear arch vertical portions 51a, and a pair of rear arch bent portions 51b extending inward from the upper end of the rear arch vertical portion 51a. A rear arch connecting portion 51c that connects the upper ends of the pair of rear arch bent portions 51b is integrally provided.

  On the lower end side of the rear arch bent portion 51b, a rubber portion 53 made of an elastic material such as rubber, and a rubber portion that supports the rubber portion 53 from below by connecting the lower portion of the rubber portion 53 and the rear arch bent portion 51b. A striker support that is fixed to the rubber portion 53 by a support bracket 54, a connecting shaft (not shown) that passes through the axis of the rubber portion 53, and a nut that is disposed above the rubber portion 53 and screwed to the connecting shaft. A bracket 55 is provided.

  The striker 52 includes a support plate 52a that is spaced apart from each other in the vehicle front-rear direction and is opposed to each other, and a rod-shaped engagement shaft 52b that connects the upper ends of the support plates 52a. The lower end of the support plate 52a is a striker. It is fixed to the support bracket 55.

  The cab 3 is a substantially box-shaped body and partitions the passenger compartment 10 inside. The cab 3 includes a roof panel 11, a side panel 12, a front frame portion 16, a dash panel 15, a back panel 14, and a floor panel 13. These panels are made of a high-strength material such as a steel plate, for example, and are formed by press molding. Moreover, these panels are joined by spot welding or the like. The cab 3 includes a cab block bracket (bracket) 60 and a cab block device 70.

  The roof panel 11 defines the upper part of the passenger compartment 10. The side panels 12 are joined to both ends of the roof panel 11 in the vehicle width direction, and define both ends of the vehicle compartment 10 in the vehicle width direction. The front frame portion 16 is joined to the side panel 12 in front of the passenger compartment 10. The dash panel 15 is joined to the front frame portion 16 and the side panel 12 and stands up along the vehicle width direction to define the front end of the vehicle compartment 10. The back panel 14 is joined to the roof panel 11 and the side panel 12 and defines a rear portion of the vehicle compartment 10. The floor panel 13 is joined to the side panel 12, the dash panel 15, and the back panel 14, and defines the bottom portion of the passenger compartment 10.

  The roof panel 11 is a substantially rectangular flat plate. Both ends in the vehicle width direction of the roof panel 11 are joined to the upper end of the side panel 12, and the rear end is joined to the upper end of the back panel 14.

  As shown in FIG. 1, the side panel 12 has a door opening 20 formed in a substantially rectangular shape at the center, and also includes a front pillar portion 21, a rocker portion 22, a fender portion 23, and a roof side rail portion. 24 and a rear pillar portion 25.

  The front pillar portion 21 includes a front pillar inclined portion 21a extending obliquely forward from the upper end and a front pillar vertical portion 21b extending bent from the lower end of the front pillar inclined portion 21a in the vertical direction. Configure the rim. The rocker portion 22 bends and extends backward from the lower end of the front pillar portion 21 (lower end of the front pillar vertical portion 21 b), and constitutes a part of the lower edge of the door opening 20. The fender portion 23 extends in an arch shape from the rear end of the rocker portion 22. The lower end side of the fender portion 23 constitutes a wheel house that covers the front wheels from above. Further, the upper end side of the fender portion 23 constitutes a part of the lower edge of the door opening 20. The roof side rail portion 24 extends from the upper end of the front pillar portion 21 (the upper end of the front pillar inclined portion 21a) so as to bend toward the rear of the vehicle, and defines the upper edge of the door opening 20. The rear pillar portion 25 connects the rear end of the fender portion 23 and the rear end of the roof side rail portion 24 to partition the rear edge of the door opening 20.

  As shown in FIGS. 3 to 6, the floor panel 13 is a substantially rectangular plate-like body, and includes a center floor panel portion 30, a pair of floor concave portions 31, and a pair of side floor panel portions 32. These are integrally formed by pressing or the like. 4-6, illustration of the protrusion part 36 of the side floor panel part mentioned later is abbreviate | omitted.

  The center floor panel 30 is formed at the center in the vehicle width direction of the passenger compartment 10 and extends from the front end of the passenger compartment 10 to the rear end, that is, from the front end to the rear end of the floor panel 13. The center floor panel portion 30 includes a center floor panel front portion 30a extending substantially horizontally from the front end of the floor panel 13 to the rear, and a center floor panel inclined portion extending inclined upward from the rear end of the center floor panel front portion 30a. 30b, and a center floor panel rear portion 30c that bends substantially parallel to the center floor panel front portion 30a from the rear end of the center floor panel inclined portion 30b and extends to the rear end of the floor panel 13. An engine room 9 that houses an engine (not shown) is formed below the center floor panel 30 of the vehicle 2.

  The floor recess 31 is formed in a pair above the cab mount 5 of the vehicle body frame 4 with the center floor panel portion 30 interposed therebetween. The floor recess 31 integrally includes a falling part 33, a flat part 34, and a rising part 35, has a U-shaped cross section, and is recessed downward. The falling portion 33 is bent from an end portion of the center floor panel portion 30 in the vehicle width direction and extends obliquely downward and outward in the vehicle width direction. The flat surface portion 34 is bent outward from the lower end of the falling portion 33 in the vehicle width direction and extends substantially horizontally in the vehicle width direction. The rising portion 35 is bent from the end of the flat portion 34 on the outer side in the vehicle width direction and extends obliquely upward and obliquely outward in the vehicle width direction. Further, the floor recess 31 extends from the front end to the rear end of the passenger compartment 10, that is, from the front end to the rear end of the floor panel 13.

  The floor recess 31 includes a floor recess front portion 31a extending rearward from the front end of the floor panel 13, a floor recess inclined portion 31b extending obliquely upward from a rear end of the floor recess front portion 31a, and a rear of the floor recess inclined portion 31b. And a floor recess rear part 31c extending from the end to the rear end of the floor panel 13 by bending substantially parallel to the floor recess front part 31a.

  The falling part 33 in the floor recessed part inclined part 31b includes a first falling part 33a and a first falling part extending obliquely downward from an end of the center floor panel rear part 30c of the center floor panel part 30 in the vehicle width direction. And a second falling portion 33b extending obliquely downward from the lower end of the portion 33a (see FIG. 5). The first falling portion 33a is inclined relatively more gently than the second falling portion 33b.

  A notch 31d that is notched in a rectangular shape is provided at the rear end of the flat surface portion 34 of the floor recess rear portion 31c.

  The side floor panel portions 32 are formed as a pair at both ends in the vehicle width direction of the bottom portion of the passenger compartment 10 with the center floor panel portion 30 and the pair of floor recesses 31 interposed therebetween. The side floor panel portion 32 extends from the upper end of the rising portion 35 of the floor recess 31 so as to be bent outward in the vehicle width direction. The side floor panel portion 32 includes a side floor panel front portion 32a extending substantially horizontally rearward from the front end of the floor panel 13, and a side floor panel inclined portion 32b extending inclined upward from the rear end of the side floor panel front portion 32a. A side floor panel rear portion 32c that bends from the rear end of the side floor panel inclined portion 32b and extends to the rear end of the floor panel 13 substantially parallel to the side floor panel front portion 32a. In addition, the side floor panel portion 32 is provided with three protrusions 36 of ribs extending across the side floor panel front portion 32a and the side floor panel inclined portion 32b with a predetermined interval.

  As shown in FIG. 3, the lower end portion of the center floor panel inclined portion 30b is disposed in front of the lower end portions of the floor recessed portion inclined portion 31b and the side floor panel inclined portion 32b. Further, the upper end portion of the center floor panel inclined portion 30b is forward of the upper end portions of the floor recessed portion inclined portion 31b and the side floor panel inclined portion 32b, and the lower end portions of the floor recessed portion inclined portion 31b and the side floor panel inclined portion 32b. Arranged at substantially the same position in the vehicle longitudinal direction.

  As shown in FIG. 4, the center floor panel front portion 30a and the side floor panel front portion 32a are formed to have the same height. Further, as shown in FIG. 6, the center floor panel rear portion 30c and the side floor panel rear portion 32c are formed to have the same height.

As shown in FIG. 2, the back panel 14 is a substantially rectangular plate-like body. The back panel 14 has a back panel opening 40 into which the rear window glass is fitted at a substantially central portion, and has a stepped portion 42 protruding forward. The back panel 14, of the lower end portion, a back panel extension 41 extending downward from the upper side portion of the floor recess rear portion 31c of the floor recessed portion 31 integrally.

  As shown in FIGS. 7 and 8, the back panel extension 41 is bent forward from the lower end of the vertical plate 41a and the vertical plate 41a extending downward while tilting forward from the lower end of the back panel 14. And a horizontal plate portion 41b extending in the direction. The vertical plate portion 41a has a substantially trapezoidal shape that becomes narrower toward the lower end when viewed from the rear.

  As shown in FIGS. 7 and 9, the cab block bracket 60 is a U-shaped body, and has a plate-shaped bottom portion (bracket bottom portion) 61 that is curved in a U-shape and both left and right sides of the bottom portion 61 (both ends in the vehicle width direction). ) And a plate-shaped side portion (joint portion on bracket) 63 extending upward. The bottom portion 61 includes a bottom flat surface portion 61a having an insertion hole (striker insertion portion) 61c through which the striker 52 of the rear cab mount is inserted in the center, and obliquely upward from both ends of the bottom flat surface portion 61a in the vehicle width direction. A bottom inclined portion 61b that bends and extends. Further, a bottom flange portion 62 is formed at the front end of the bottom flat surface portion 61a and the bottom inclined portion 61b and bent upward.

  The side part 63 has a side part vertical part 63a that extends in the vertical direction, and a side part bent part 63b that extends by bending outward from the upper end part of the side part vertical part 63a along the vehicle width direction. Further, an inner flange portion 63c is formed at the front end of the side vertical portion 63a so as to bend inward along the vehicle width direction. Further, an outer flange portion 63d extending outward along the vehicle width direction is formed at the rear end of the side portion 63. A bolt hole 63e through which a bolt is inserted is formed at substantially the center of the outer flange portion 63d.

  As shown in FIG. 9, the cab lock device 70 includes a base 71, a link 72, a cab lock hook 73, and a spring member 74. The link 72 is supported with respect to the base 71 so as to be rotatable in the locking direction and the unlocking direction around the first rotation shaft 75. The cab lock hook 73 is supported so as to be rotatable about the second rotation shaft 76 with respect to the link 72, and is movable in the lock direction and the lock release direction with respect to the base 71. When the link 72 rotates in the lock direction, the cab lock hook 73 also moves in the lock direction. When the link 72 rotates in the lock release direction, the cab lock hook 73 also moves in the lock release direction.

  The base 71 of the cab block device 70 has front and rear plate portions (front plate portion 71a and rear plate portion 71b) that are spaced apart from each other. Bolt holes 71c communicating with the bolt holes 63e formed in the outer flange part 63d of the cab block bracket 60 are formed at both ends in the vehicle width direction of the rear plate part 71b.

  Next, the joining aspect of the floor panel 13, the back panel 14, the cab block bracket 60, and the cab block device 70 will be described.

  As shown in FIGS. 1 and 8, the floor panel 13 and the back panel 14 are welded to the rear edge of the floor panel 13 and the lower edge of the back panel 14 by spot welding or the like. The side surface portion of the plate portion 41a is welded to the inner peripheral surface of the rear end of the floor recess rear portion 31c of the floor recess portion 31 by spot welding or the like, and the lower surface of the horizontal plate portion 41b of the back panel extension portion 41 is welded to the floor recess portion. It contacts with the upper surface of the rear-end part of the back part 31c, and is joined by welding by spot welding etc.

  When the floor panel 13 and the back panel 14 are joined, the vertical plate portion 41 a of the back panel extension 41 closes the rear of the floor recess 31.

  In the back panel 14 and the cab block bracket 60, the front surface of the bottom flange portion 62 of the cab block bracket 60 is the rear surface of the vertical plate portion 41a of the back panel extension 41, and the front surface of the inner flange portion 63c is the back panel 14. The rear surface and the upper surface of the side bent portion 63b are joined to the step portion 42 by welding by spot welding or the like.

  The cab block bracket 60 and the floor panel 13 are such that the lower surface of the front end portion of the bottom flat surface portion 61a of the cab block bracket 60 and the upper surface of the rear end portion of the flat surface portion 34 of the floor recess rear portion 31c overlap each other. The bottom surface of the bottom inclined portion 61b located on the inner side (left side) in the vehicle width direction and the top surface of the rear end portion of the falling portion 33 of the floor recess rear portion 31c are overlapped vertically. And the bottom surface of the bottom inclined portion 61b located on the outer side (right side) in the vehicle width direction and the top surface of the rear end portion of the rising portion 35 of the floor recess rear portion 31c are overlapped in the vertical direction and welded. Are joined together. When the cab block bracket 60 and the floor panel 13 are joined, the insertion hole 61c provided in the bottom flat surface portion 61a and the opening of the notch portion 31d provided in the flat surface portion 34 of the floor concave portion 31c communicate with each other. .

  The cab block bracket 60 and the cab block device 70 include a bolt hole 71 c formed in the rear plate portion 71 b of the base 71 body of the cab block device 70, and a bolt hole 63 e formed in the outer flange portion 63 d of the cab block bracket 60. The bolts that pass through the connected bolt holes 63e and 71c are screwed together with the nuts to be joined.

  Next, a mode in which the cab 3 is supported by the vehicle body frame 4 via the rear cab mount 5 will be described.

  As shown in FIG. 9, when the cab is in the non-tilt position, the striker 52 of the rear cab mount 5 of the vehicle body frame 4 is inserted from below through the insertion hole 61c of the bottom flat surface portion 61a of the cab block bracket 60 portion of the cab. The cab lock hook 73 of the cab lock device 70 joined to the cab lock bracket 60 engages with the striker 52 inserted through the insertion hole 61c from above. As a result, the cab 3 is supported on the vehicle body frame 4 via the rear cab mount 5.

  According to the present embodiment, the cab block bracket 60 and the cab 2 include the front surface of the inner flange portion 63c and the front surface of the bottom flange portion 62, the bottom flat surface portion 61a, and the bottom inclined portion 61b on the cab block bracket 60 side. By joining to the rear surface of the back panel 14 on the side, the rear surface of the vertical plate portion 41a, and the upper surface of the flat portion 34, the falling portion 33, and the rising portion 35 of the floor recessed portion rear portion 31c. For this reason, the input of vibration and the like from the vehicle body frame 4 to the lower rear end of the cab 2 is shared by the joint portion on the cab block bracket 60 side and the cab 2 side and input to the cab 2. The rigidity of the joint portion can be sufficiently secured without increasing the thickness of the joint portion, that is, without increasing the weight of the vehicle 2.

  Further, when the back panel extension 41 is joined to the floor recess rear part 31 c, the vertical plate part 41 a of the back panel extension 41 closes the rear of the floor recess 31. For this reason, it is possible to prevent water and mud from entering the cab 2 from the outside of the cab 2 through the floor recess 31, and to prevent noise outside the cab 2 from being transmitted to the cab 2 through the floor recess 31. it can.

  Further, since the floor recess 31 of the floor panel 13 is bent, the shape of the floor panel 13 is not easily deformed by the input to the floor panel 13, and the rigidity of the floor panel 13 is ensured by the floor recess 31. For this reason, it is not necessary to adhere a reinforcing member such as a main sill to the lower surface of the floor panel 13, and the number of parts and the number of assembly steps are reduced. Therefore, the vehicle weight can be reduced and the assembly workability can be improved.

  In addition, the inner surface of the floor recess 31 can be used, for example, as a storage part for in-vehicle supplies such as an in-vehicle fire extinguisher or a jack handle, and the space on the floor surface of the vehicle interior 10 can be effectively used. .

  As mentioned above, although embodiment which applied the invention made | formed by this inventor was described, this invention is not limited with the description and drawing which make a part of indication of invention by this embodiment.

In the present embodiment, the mode in which the inner flange portion 63c of the side portion 63 and the rear surface of the back panel 14 are joined has been described. However, the front end edge of the side portion 63 is connected to the back panel 14 without providing the inner flange portion 63c. You may join to the rear-end lower part.

  Similarly, the front end edges of the bottom flat surface portion 61a and the bottom inclined portion 61b may be joined to the rear surface of the vertical plate portion 41a without providing the bottom flange portion 62 of the bottom flat surface portion 61a and the bottom inclined portion 61b.

  That is, it should be added 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.

  The present invention is widely applicable to a rear end lower structure of a cab of a cab over type vehicle.

1: Rear end lower structure 2: Vehicle 3: Cab 4: Body frame 5: Rear cab mount (cab mount)
13: Floor panel 14: Back panel 30: Center floor panel part 31: Floor recessed part 31a: Floor recessed part front part 31b: Floor recessed part inclined part 31c: Floor recessed part rear part 31d: Notch part 32: Side floor panel part 33: Falling Part 34: Plane part 35: Rising part 40: Back panel opening 41: Back panel extension 41a: Vertical plate part 41b: Horizontal plate part 42: Step part 51: Rear arch 52: Striker 60: Cab lock bracket (bracket)
61: bottom (bracket bottom)
61a: bottom flat surface part 61b: bottom inclined part 61c: insertion hole (striker insertion part)
62: Bottom flange part 63: Side part (joint part on bracket)
63a: side vertical part 63b: side bent part 63c: inner flange part 63d: outer flange part 63e: bolt hole 70: cab block device 71: base 71a: front plate part 71b: rear plate part 71c: bolt hole 73 : Cab lock hook

Claims (2)

By engaging a cab block device fixed to the lower rear end of the cab having a back panel and a floor panel from above with a cab mount striker provided on the vehicle body frame, the vehicle body frame via the cab mount. The rear end lower structure of the cab supported by
A floor recess that is bent and recessed downward in the upper part of the cab mount of the rear end of the floor panel;
A plate-like bracket bottom portion formed with a striker insertion portion through which the cab lock device is fixed and the striker is inserted, and left and right portions extending upward from the left and right sides of the bracket bottom portion and joined to the rear surface of the back panel A bracket on the bracket, and a bracket disposed above the cab mount;
A vertical plate portion extending downward toward the upper surface of the floor recess from above side portions of the floor recess of the lower end of the back panel extends bent forward from the bottom of the vertical plate portion, of the floor recess and a back panel extension having a transverse plate portion joined overlapping from top side to the top surface,
The front edge of the bracket bottom is joined to the rear surface of the vertical plate portion of the back panel extension,
The lower structure of the front end of the cab is characterized in that the lower surface of the bottom of the bracket is joined to the upper surface of the floor recess. The rear end lower structure of the cab according to claim 1,
The front plate lower end structure of the cab, wherein a vertical plate portion of the back panel extension portion is joined to the floor recess to close the rear of the floor recess.

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