JP2018058514A - Bump stopper structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bump stop structure which can surely prevent the deformation of a rubber bracket even if a rear gate vigorously falls down to an open position, and collides with bump rubber.SOLUTION: A main sill 4 in which an accessory 31 is fixed to an upper face is fixed to upper faces of a chassis frame 2. In a rear gate 34, one end part of the rear gate 34 is rotatably supported to a rear lower end part of the accessory 31 so as to be tiltable between a closed position in which the rear gate erects along a vehicle width direction, and an open position in which the rear gate falls to a rear lower part down from the closed position. Left and right bracket side plate parts 43 of a bump bracket 40 are arranged at a lower part of the rear lower end part of the accessory 31, oppositely extend to a front part from both end edges in the vehicle width direction of a bracket rear plate part 42 which is substantially orthogonal to a fore-and-aft direction, and are fixed to at least either of the chassis frame 2 or the main sill 4. The bump rubber 41 is attached to a rear face of the bracket rear plate part 42, and the rear gate 34 in the open position abuts thereon from a rear side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bump stopper structure.

  Patent Document 1 describes a gate stopper that regulates the rotation of a gate of a dump truck bed. The rear end mounting bracket is attached to the rear end of the chassis frame of the dump truck so that it protrudes toward the rear of the vehicle. The mounting member is fixed to the upper surface of the rear end mounting bracket, and the mounting bracket is attached to the rear surface of the mounting member with bolts. The gate stopper is attached to the mounting bracket. Further, a state in which the mounting bracket is supported on the chassis frame side in a cantilever manner only by the upper end portion above the gate stopper is illustrated.

Japanese Patent Laid-Open No. 2000-219081

  In the structure described in Patent Document 1, the mounting bracket (rubber bracket) is supported on the vehicle body side (chassis frame side) in a cantilevered manner only by the upper end portion above the gate stopper (bump rubber). When the rubber bracket collides with the bump rubber by vigorously falling from the closed position to the open position below, the rubber bracket may be bent and deformed due to an excessive moment of the rubber bracket.

  Therefore, an object of the present invention is to provide a bump stopper structure that can reliably prevent the deformation of the rubber bracket even when the rear gate falls down to the open position and collides with the bump rubber.

  In order to achieve the above object, according to the present invention, a pair of left and right vertical joists are mounted and fixed on the upper surfaces of a pair of left and right chassis frames, and a body is mounted on the upper surfaces of the left and right vertical joists. Fixed, the rear lower end of the bodywork protrudes rearward from the rear end of the chassis frame and the rear end of the vertical joist, and the rear gate stands up along the vehicle width direction and falls rearward and downward from the closed position. A bump stopper structure for a vehicle in which one end portion of a rear gate is rotatably supported on a rear lower end portion of a body so as to be tiltable between a hanging open position and includes a bump bracket and a bump rubber.

  The bump bracket is disposed below the rear lower end portion of the bodywork and extends from the both ends of the bracket rear plate portion in the vehicle width direction so as to face each other in the front and rear directions. A pair of left and right bracket side plates fixed to at least one of the vertical joists is integrally provided. The bump rubber is attached to the rear surface of the rear plate portion of the bracket of the bump bracket, and the rear gate in the open position contacts from the rear.

  In the above configuration, the rear plate of the bracket is substantially orthogonal to the front and rear direction, bump rubber is attached to the rear surface of the rear plate of the bracket, and the left and right bracket side plates are opposed to each other forward from both ends of the bracket rear plate in the vehicle width direction. And is fixed to the vehicle body side (to at least one of the chassis frame and the vertical joist). That is, the left and right bracket side plate portions are fixed to the vehicle body side and extend rearward, and the left and right sides of the bracket rear plate portion are supported from the front side to the vehicle body side via the left and right bracket side plate portions. For this reason, when the rear gate falls to the open position and collides with the bump rubber, the moment acting on the rubber bracket (bracket rear plate and bracket side plate) is extremely small, and the load input from the rear gate is the left and right bracket side plates. Input to the car body side. Therefore, even when the rear gate falls to the open position and collides with the bump rubber, the deformation of the rubber bracket can be surely prevented.

  According to the present invention, it is possible to reliably prevent the rubber bracket from being deformed even when the rear gate falls down vigorously to the open position and collides with the bump rubber.

It is a side view in the state where the rear gate of vehicles provided with bump stopper structure concerning this embodiment exists in an open position. FIG. 2 is a side view of a main part in a state where a rear gate of the vehicle in FIG. 1 is in an open position. FIG. 2 is a perspective view of a main part in a state where a rear gate of the vehicle of FIG. 1 is in a closed position. FIG. 2 is a rear view of the vehicle of FIG. 1 with a rear gate in a closed position. It is a VV arrow sectional view of Drawing 3.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side, and arrow IN indicates the inner side of the vehicle width. In the following description, the front-rear direction means the front-rear direction of the vehicle, and the left-right direction means the left-right direction in a state where it faces the front of the vehicle.

  As shown in FIG. 1, a vehicle 1 having a bump stopper structure according to the present invention is a cab-over type truck, and is supported from below on a pair of left and right chassis frames 2 and front portions of left and right chassis frames 2. Cab 3, a pair of left and right vertical joists 4 supported from below in each of the rear portions of left and right chassis frames 2, a loading platform (mounting) 5 supported by vertical joists 4 from below, and left and right vertical joists 4 and a pair of left and right bump stoppers 6 fixed to the rear end edge of each. The bump stopper 6 is provided symmetrically on the left and right sides of the vehicle 1 and has substantially the same configuration. Therefore, the left side will be described below, and the description on the right side will be omitted.

  As shown in FIGS. 1 to 4, the chassis frame 2 has an outer plate portion 10, an inner plate portion 11, an upper plate portion 12, and a lower plate portion 13, and the front and rear of the vehicle 1 at both ends in the vehicle width direction. It is the rectangular cylinder shape extended along a direction. The left and right chassis frames 2 are connected by a plurality of cross members 7 extending in the vehicle width direction. Chassis side fastening bolt insertion holes (illustrated in the figure) at three locations (front end, substantially center and rear end of the rear area of the cab) through which the bolt shaft 37 of the fastening bolt 36 can be inserted into the outer plate portion 10 of the chassis frame 2. (Omitted) is formed. The chassis frame 2 includes an upper plate portion and a lower plate portion that extend in the front-rear direction in a state of being opposed to each other in the vertical direction, and an outer edge and a lower plate in the vehicle width direction of the upper plate that are raised in the vertical direction. It may be a U-shaped cross section that integrally has a vertical plate portion that connects an outer edge in the vehicle width direction of the portion and opens inward in the vehicle width direction.

  The vertical joist 4 has a vertical joist main body 15 and a plurality of vertical joist support parts (only two rear parts on the right side are shown in FIG. 3) 16 and extends along the front-rear direction of the vehicle 1 at both ends in the vehicle width direction. The upper part 12 of the upper frame 12 of the chassis frame 2 is placed in the rear region of the cab 3 and is connected to a plurality of (three in the present embodiment) coupling plates 17 at three locations (front end, substantially central part, and rear end). To be coupled to the chassis frame 2. The rear end edge of the chassis frame 2 and the rear end edge of the vertical joist 4 are provided on the same plane orthogonal to the front-rear direction.

  The vertical joist body 15 includes a vertical joist upper plate portion 18 and a vertical joist lower plate portion 19 that extend in the front-rear direction while being spaced apart from each other in the vertical direction, and a vertical joist upper plate portion 18 that stands up and down. This is a U-shaped cross section that integrally has a vertical joist side plate portion 20 that connects the outer edge in the width direction and the outer end edge in the vehicle width direction of the vertical joist lower plate portion 19 and opens inward in the vehicle width direction. The vertical joist side plate portion 20 has six vertical joist side fastening bolts through which the bolt shaft 37 of the fastening bolt 36 can be inserted (two places before and after the front end, two places before and after the substantially central portion, and two places before and after the rear end). An insertion hole 21 is formed. The vertical joist main body 15 has an outer plate portion, an inner plate portion, an upper plate portion, and a lower plate portion, and may have a rectangular cylindrical shape that extends along the vehicle front-rear direction at both ends in the vehicle width direction. Good.

  The plurality of vertical joist support portions 16 include an upper support plate portion 24 and a vertical support plate portion 26, and a predetermined interval is provided between the vertical joist upper plate portion 18 and the vertical joist lower plate portion 19 in the front-rear direction. Arranged. The upper support plate portion 24 is a flat plate that is fixed in a state of surface contact with the lower surface of the vertical joist upper plate portion 18. The vertical support plate portion 26 includes a rear plate portion 27 that stands in the vertical direction between the lower surface of the upper support plate portion 24 and the upper surface of the vertical joist lower plate portion 19 and extends in a direction crossing the front-rear direction, and a vehicle width direction. And a side plate portion 28 that bends from the inner edge and extends forward. The upper end edge of the vertical support plate portion 26 is fixed to the lower surface of the upper support plate portion 24 by welding or the like, and the lower end edge of the vertical support plate portion 26 is fixed to the upper surface of the vertical joist lower plate portion 19 by welding or the like. Between the vertical joist upper plate part 18 and the vertical joist lower plate part 19 at the rear end edge of the vertical joist 4, among the plurality of vertical joist support parts 16, the rear end vertical joist support arranged at the rearmost side is supported. A portion (shown only on the right side in FIG. 3) 29 is arranged.

  As shown in FIGS. 2 and 5, the plurality of (three in the present embodiment) coupling plates 17 have a substantially rectangular plate shape, and at the upper end portion, two bolt shafts 37 of the fastening bolts 36 can be inserted. Upper fastening bolt insertion holes 22 are respectively formed, and lower fastening bolt insertion holes 23 into which the bolt shafts 37 of the fastening bolts 36 can be inserted are formed at the lower ends. The two upper fastening bolt insertion holes 22 of each of the three coupling plates 17 have six vertical joist side fastening bolts (two at the front and rear at the front end, two at the front and rear at the substantially central portion, and two at the front and rear). It is provided at a position corresponding to the insertion hole 21. The lower fastening bolt insertion holes 23 of each of the three coupling plates 17 are provided at positions corresponding to the chassis side fastening bolt insertion holes at three locations (the front end portion, the substantially central portion, and the rear end portion of the rear region of the cab). It is done. A fastening nut (not shown) that is screwed with a fastening bolt 36 inserted through the chassis side fastening bolt insertion hole from the outside in the vehicle width direction to the inside in the vehicle width direction is welded to the inside of the outer plate portion 10 of the chassis frame 2 in the vehicle width direction. Is done. On the inner side in the vehicle width direction of the vertical joist side plate portion 20 of the vertical joist 4, there are fastening nuts 38 that are screwed into the fastening bolts 36 inserted through the vertical joist side fastening bolt insertion holes 21 from the outer side in the vehicle width direction to the inner side in the vehicle width direction, respectively. Welded. The lower surface of the vertical joist lower plate portion 19 of the vertical joist 4 and the upper surface of the upper plate portion 12 of the chassis frame 2 are overlapped and brought into surface contact, and the coupling plate 17 is connected to the outer surface in the vehicle width direction of the vertical joist side plate portion 20 and the chassis frame 2. The upper fastening bolt insertion hole 22 is aligned with the vertical joist side fastening bolt insertion hole 21 in a state in which the inner surface in the vehicle width direction of the coupling plate 17 is overlapped with the outer surface in the vehicle width direction of the outer plate portion 10, and the lower side The fastening bolt insertion hole 23 is aligned with the chassis side fastening bolt insertion hole, the bolt shaft 37 of the fastening bolt 36 is inserted into the upper fastening bolt insertion hole 22 and the lower fastening bolt insertion hole 23 from the outside in the vehicle width direction, and the fastening bolt 36 is inserted. The vertical joists 4 are coupled to the chassis frame 2 by screwing into the fastening nuts 38 and fastening.

  As shown in FIGS. 1 to 4, the loading platform 5 includes a plurality of horizontal joists 30, a floor plate portion 31, a front wall portion 32, a pair of left and right side walls 33, and a rear gate 34, and a rear lower end portion of the loading platform 5. Protrudes rearward from the rear end portion of the chassis frame 2 and the rear end portion of the vertical joists 4. The plurality of horizontal joists 30 are disposed in the rear region of the cab 3 at a predetermined interval in the front-rear direction, and are placed in a state of crossing over the upper surface of the vertical joist upper plate portion 18. The vertical joists 4 and the horizontal joists 30 are fastened and fixed via angle clips (not shown). The floor plate portion 31 has a substantially rectangular flat plate shape and is fixed in a state of being placed on the plurality of horizontal joists 30 to form the floor surface of the loading platform 5. The front wall portion 32 extends upward from the front end edge of the floor plate portion 31, and stands along the vehicle width direction with a gap behind the cab 3. The left and right side wall portions 33 extend oppositely from the lower end portions of the front end portions of the front wall portion 32 in the vehicle width direction, and the lower end edges are fixed to the both end portions of the floor plate portion 31 in the vehicle width direction. The lower edge of the rear gate 34 is rotatably supported by the rear end edge of the floor plate portion 31 via three hinges 35 (both ends in the vehicle width direction and approximately the center in the vehicle width direction), and along the vehicle width direction. It can be tilted between a standing position where it stands up and an open position where it hangs downward from the closed position, and both end edges in the vehicle width direction are connected to the rear end edges of the left and right side walls 33 so that they can be opened and closed.

  As shown in FIGS. 2, 3, and 5, the bump stopper 6 includes a bump bracket 40 and a bump rubber 41, and is fixed to the rear end portion of the vertical joist 4. In the present embodiment, the structure in which the bump stopper 6 is fixed to the rear end portion of the vertical joist 4 is exemplified, but the present invention is not limited to this. For example, at least one of the chassis frame 2 and the vertical joist 4 is used. The bump stopper 6 may be fixed.

  The bump bracket 40 is disposed below the rear end portion of the loading platform 5 and extends from the both ends of the bracket rear plate portion 42 in the vehicle width direction so as to face each other. It is a flat plate-like member having a U-shaped cross section that integrally has the bracket side plate portion 43 and opens forward. A bracket-side fixing bolt insertion hole 44 through which the bolt shaft 48 of the rubber fixing bolt 47 that fixes the bump rubber 41 to the bump bracket 40 is inserted is formed at substantially the center of the rear surface of the bracket rear plate portion 42. The inner surface in the vehicle width direction of the bracket side plate portion 43 on the outer side in the vehicle width direction is in surface contact with the outer surface in the vehicle width direction on the vertical joist side plate portion 20, and the outer surface in the vehicle width direction on the bracket side plate portion 43 on the inner side in the vehicle width direction. The bump bracket 40 is fixed to the vertical joist 4 by fixing the bracket side plate 43 to the vertical joist body 15 and the vertical joist support 16 by welding or the like in a state in which the side plate 28 is in surface contact with the inner side in the vehicle width direction. Is done. In the present embodiment, the structure in which the bump bracket 40 is fixed to the rear end portion of the vertical joist 4 by welding or the like is illustrated, but the present invention is not limited to this. For example, the bump bracket 40 is fixed by a bolt or the like. 4 may be fixed to the rear end portion.

  The bump rubber 41 is a circle having a front surface 41a in surface contact with the rear surface of the bracket rear plate portion 42 of the bump bracket 40 and a rear surface 41b with which the rear gate 34 in the open position contacts from the rear in a state of being fixed to the bump bracket 40. It is an elastic material such as a columnar rubber, and is fixed to the rear surface of the bracket rear surface portion 42 by rubber fixing bolts 47. The bump rubber 41 is provided on the rear surface 41 b side, and is provided on the front surface 41 a side with a receiving hole 45 for receiving the bolt head 49 of the rubber fixing bolt 47, and the bolt shaft 48 of the rubber fixing bolt 47 can be inserted. The bolt insertion hole 46 is formed so as to continue from the rear surface 41b to the front surface 41a. In the state where the rear surface of the bracket rear plate portion 42 of the bump bracket 40 and the front surface 41a of the bump rubber 41 are overlapped and brought into surface contact, the fixing bolt insertion hole 46 of the bump rubber 41 is inserted into the bracket side fixing bolt of the bracket rear plate portion 42. The bump rubber 41 is fitted to the bump bracket 40 by inserting the bolt shaft 48 of the rubber fixing bolt 47 into the fixing bolt insertion hole 46 from the rear in accordance with the hole 44 and screwing the rubber fixing bolt 47 into the fixing nut 50 and fastening. The bolt head 49 is accommodated in the accommodation hole 45. In the present embodiment, the structure in which the bump rubber 41 is fixed to the bracket rear plate portion 42 of the bump bracket 40 by the rubber fixing bolt 47 is illustrated, but the present invention is not limited to this. The rubber 41 may be fixed to the bracket rear plate portion 42.

  In the above configuration, the bracket rear plate portion 42 is substantially orthogonal to the front-rear direction, the bump rubber 41 is attached to the rear surface of the bracket rear plate portion 42, and the left and right bracket side plate portions 43 are both edges in the vehicle width direction of the bracket rear plate portion 42. It is fixed to the vertical joist 4 by extending oppositely from the front. That is, the left and right bracket side plate portions 43 are fixed to the vehicle body side and extend rearward, and the left and right sides of the bracket rear plate portion 42 are supported on the vehicle body side from the front side via the left and right bracket side plate portions 43. For this reason, when the rear gate 34 falls to the open position and collides with the bump rubber 41, the moment acting on the bump bracket (the bracket rear plate portion 42 and the bracket side plate portion 43) 40 is extremely small, and the load input from the rear gate 34 Are distributed to the left and right bracket side plate portions 43 and input to the vehicle body side. Therefore, even when the rear gate 34 falls to the open position and collides with the bump rubber 41, the deformation of the bump bracket 40 can be reliably prevented.

  In the present embodiment, the structure in which the chassis frame 2 and the vertical joist 4 are coupled by the fastening plate 17 is illustrated, but the present invention is not limited to this. For example, a U-shaped steel having male screw portions at both ends. The chassis frame 2 and the vertical joist 4 are connected by a fastening member or the like that inserts both ends of a shaft material (for example, U bolts) into a steel plate material (for example, washer) and screwes and tightens a nut to the male screw portion to restrain a plurality of members. May be combined.

  In the present embodiment, the bump stopper structure is applied to the vehicle 1 that is a cab-over type truck. However, the present invention is not limited to this, and the bump stopper structure is applied to various vehicles including a rear gate. May be.

  Moreover, the body supported by the vertical joists 4 is not limited to the loading platform 5 and may be any body having a rear gate.

  As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. 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 can be widely applied to various vehicles including a rear gate.

1 Vehicle 2 Chassis Frame 3 Cab 4 Vertical joist 5 Loading platform (mounting)
6 Bump stopper 10 Outer plate portion 12 Upper plate portion 15 Vertical joist body 16 Vertical joist support portion 17 Bonding plate 18 Vertical joist upper plate portion 19 Vertical joist lower plate portion 20 Vertical joist side plate portion 24 Upper support plate portion 26 Vertical support plate portion 29 Rear end vertical joist support portion 30 Horizontal joist 31 Floor plate portion 34 Rear gate 35 Hinge 40 Bump bracket 41 Bump rubber 41a Front surface 41b Rear surface 42 Bracket rear plate portion 43 Bracket side plate portion 45 Housing hole 46 Fixing bolt insertion hole 47 Rubber fixing bolt

Claims (1)

A pair of left and right vertical joists are placed and fixed on the upper surfaces of the pair of left and right chassis frames, and a body is placed and fixed on the upper surfaces of the left and right vertical joists, and the rear lower end of the body Projecting rearward from the rear end portion of the chassis frame and the rear end portion of the vertical joist, and a closed position where the rear gate stands along the vehicle width direction and an open position where the rear gate falls down from the closed position and hangs down. A bump stopper structure for a vehicle in which one end portion of the rear gate is rotatably supported by a rear lower end portion of the bodywork so as to be tiltable between,
A bracket rear plate portion that is disposed below the rear lower end portion of the bodywork and that is substantially orthogonal to the front-rear direction, and extends oppositely from both ends in the vehicle width direction of the bracket rear plate portion to the front to extend the chassis frame or the A bump bracket integrally having a pair of left and right bracket side plates fixed to at least one of the vertical joists,
A bump stopper structure, comprising: a bump rubber attached to a rear surface of the rear plate portion of the bump bracket, and a rear gate at the open position abutting from the rear.

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