JP5240851B2 - Work machine - Google Patents

Description

  The present invention relates to a work machine provided with a mirror on a fuel tank.

  An operator's driver's seat is provided on one side of the machine body of a hydraulic excavator, and a mirror is installed on the bonnet on the other side of the machine body so as to ensure a field of view on the opposite side of the machine body as viewed from the operator (for example, Patent Document 1). 2).

  There was one mirror on the other side of the aircraft for the operator on the one side of the aircraft, but one mirror in this location could not satisfy the field of view required by the international standard ISO5006 (visibility) of the International Organization for Standardization. It is necessary to install several mirrors.

JP 2002-348916 A (first page, FIG. 1) Japanese Patent Laying-Open No. 2003-193515 (page 4, FIG. 3)

  Depending on the model, when the mirror must be mounted on the fuel tank via the support column, the weight of the mirror is concentrated on the fuel tank, so tank strength that matches the mirror weight is required. In a structure that stands up, sufficient tank strength cannot be secured.

  The present invention has been made in view of these points, and an object of the present invention is to provide a work machine capable of ensuring sufficient tank strength that can be used when a mirror is attached to a fuel tank.

  The invention described in claim 1 includes a fuselage, a cab installed on one side of the fuselage, a fuel tank installed on the other side of the fuselage, and a tank upper surface reinforcement fixed to the upper surface of the fuel tank. Plate, a mirror mounting support structure attached to the tank upper surface reinforcing plate, and a mirror attached to the mirror mounting support structure. The tank upper surface reinforcing plate is attached with the mirror mounting support structure. The working machine includes a mounting surface portion, a tank side plate upper portion located on the opposite side of the cab from the mounting surface portion, and an extended reinforcing surface portion protruding from another tank side plate upper portion adjacent to the tank side plate upper portion.

  According to a second aspect of the present invention, in the work machine according to the first aspect, the extended reinforcing surface portion protruding from the mounting surface portion to the upper portion of the tank side plate located on the opposite side of the cab is bent downward along the tank shape. It has been done.

  According to a third aspect of the present invention, the mirror mounting support structure in the work machine according to the first or second aspect is configured such that the support portion attached to the tank upper surface reinforcing plate and the upper end of the support portion protrude horizontally. And a mirror mounting arm.

  According to a fourth aspect of the present invention, in the work machine according to the third aspect, an intermediate portion of the arm portion is fixed to an upper end of one support portion, and mirrors are respectively attached to both ends of the arm portion. is there.

  According to the invention described in claim 1, the tank upper surface reinforcing plate projects the extended reinforcing surface portion from the mounting surface portion to the upper part of the two tank side plates having high rigidity in the fuel tank, thereby providing a mirror mounting support structure. Ensuring sufficient strength for the fuel tank that is the body mounting base, preventing deformation and destruction of the tank, and the tank upper surface reinforcing plate extends from the mounting surface to the upper part of two highly adjacent tank side plates Since the reinforcing surface portions protrude from each other to form a two-dimensionally stable support plate structure, it is possible to secure the support strength when the mirror is mounted on the fuel tank of the work machine.

  According to the invention described in claim 2, the tank side plate upper portion of the fuel tank has high rigidity, and protrudes from the mounting surface portion to the tank side plate upper portion, and downwards from the tank upper surface along the tank shape. The bent extended reinforcing surface portion can further increase the rigidity of the fuel tank, so that a larger tank strength can be secured, and deformation and destruction of the tank can be reliably prevented.

  According to the third aspect of the present invention, the mirror can be reliably supported by the support portion attached to the tank upper surface reinforcing plate and the arm portion protruding horizontally from the upper end thereof.

  According to the fourth aspect of the present invention, the intermediate portion of the arm portion is fixed to the upper end of the column portion of the mirror mounting support structure, and a plurality of mirrors can be supported in a balanced manner at the respective tips of the arm portion.

It is a perspective view which shows one Embodiment of the mirror attachment structure installed on the fuel tank of the working machine which concerns on this invention. It is a top view of a tank same as the above. It is a front view of a tank same as the above. It is a side view of the working machine provided with the same tank. It is the front view which expanded the mirror mounting structure on a tank same as the above. It is a top view which shows the visual field range which can be ensured with the mirror on a tank same as the above.

  Hereinafter, the present invention will be described in detail with reference to an embodiment shown in FIGS.

  As shown in FIG. 4, a hydraulic excavator 11 as a work machine is provided with an upper swing body 13 as a machine body on a lower traveling body 12 so as to be capable of swinging, and an excavator for excavation at the front center of the upper swing body 13. A working device 14 is installed, and through this working device 14, a cab 15 is installed on one side of the upper swing body 13, and a storage box 16 and a fuel tank 17 are installed on the other side of the upper swing body 13, An engine 18 is installed at the rear of these, and a counterweight 19 is installed at the rear.

  As shown in FIGS. 5 and 1, a fuel supply port 21 is provided on the upper surface of the fuel tank 17, and a tank upper surface reinforcing plate 22 having a thickness of about 8 mm is fixed by welding or the like. A mounting surface reinforcing plate 23 having a thickness of about 16 mm is fixed to the upper surface reinforcing plate 22 by welding or the like, and the bottom plate portion 25 of the mirror mounting support structure 24 is connected to these tanks via the mounting surface reinforcing plate 23. The upper surface reinforcing plate 22, the mounting surface reinforcing plate 23, and the mounting holes 26 (shown in FIG. 2) drilled in the bottom plate portion 25 are attached by three or more bolts 27. These bolts 27 are screwed into female screws formed in the mounting holes 26 or nuts welded to the back surface of the fuel tank 17.

  In the mirror mounting support structure 24, a support column 31 is welded to the bottom plate 25, and is reinforced by a plurality of ribs 32 welded between the support 31 and the bottom plate 25. The intermediate portions of the mirror mounting arm portions 33, 34 formed in a single plate shape are fixed by welding or the like, and these arm portions 33, 34 project horizontally from the upper end of the column portion 31, A mounting bar 35 is provided at the tip of each arm 33, 34, and mirrors 36, 37 are mounted on these mounting bars 35, respectively. The arms 33 and 34 are welded to the upper end of the column 31 at the center of the plate formed in a square shape, and each of the mirrors 36 and 37 is arbitrarily attached by a spherical support member 38 attached to each mounting bar 35. Adjustable to the angle.

  As shown in FIGS. 1 to 3, the tank upper surface reinforcing plate 22 includes a mounting surface portion 41 to which the mirror mounting support structure 24 is mounted, and a tank side plate upper portion 42 located on the opposite side of the cab 15 from the mounting surface portion 41. And extended reinforcing surface portions 44 and 45 projecting from the tank side plate upper portion 43 adjacent to the tank side plate upper portion 42, respectively.

  The tank side plate upper part 42 located on the opposite side of the cab 15 in the fuel tank 17 is bent, and the tank upper surface reinforcing plate 22 protrudes from the mounting surface 41 to the bent tank side plate upper part 42. The extended reinforcing surface portion 44 is bent downward along the tank shape and welded.

  In this way, the upper surface of the fuel tank 17 installed on the right side of the fuselage is reinforced by the tank upper surface reinforcing plate 22 extended to the highly rigid tank side plate upper portions 42 and 43, and the mirror mounting support structure on the tank upper surface reinforcing plate 22 Install the body 24 and attach the two mirrors 36 and 37. The mounting surface reinforcing plate 23 is installed as necessary.

  In FIG. 1, a step 46 is attached to the upper swing body 13, and a bracket 47 for attaching the work device 14 is attached.

  Next, the function and effect of the illustrated embodiment will be described.

  As shown in FIG. 6, the view of the right region A of the excavator 11 as viewed from the operator in the cab 15 is secured by one mirror 36, and the view of the right rear region B is secured by the other mirror 37. Further, in addition to these mirrors 36 and 37, a rear view camera (not shown) installed on the counterweight 19 and a cab mirror (not shown) attached to the handrail of the elevator door of the cab 15 , To satisfy the field of view requirement of ISO5006.

  Mirror mounting support while maintaining the strength of the fuel tank 17 by the tank upper surface reinforcing plate 22 for the mirror mounting in which the reinforcing reinforcing surface portions 44, 45 are formed up to the highly rigid tank side plate upper portions 42, 43 in the fuel tank 17. Since the plurality of mirrors 36 and 37 are supported on the fuel tank 17 via the structure 24, even if a lateral load acts on the head of the mirror mounting support structure 24 due to mechanical vibration or the like, the fuel tank 17 may be deformed. It can prevent destruction.

  That is, the tank upper surface reinforcing plate 22 projects the extended reinforcing surface portions 44 and 45 from the mounting surface portion 41 to the two tank side plate upper portions 42 and 43 having high rigidity in the fuel tank 17, respectively. The fuel tank 17, which is the mounting base of 24, can secure sufficient tank strength to accommodate the plurality of mirrors 36, 37, prevent deformation and destruction of the tank, and the tank upper surface reinforcing plate 22 Since the extended reinforcing surface portions 44 and 45 project to the two tank side plate upper portions 42 and 43 adjacent to each other in rigidity, a two-dimensionally stable support plate structure is formed, so that the fuel tank of the hydraulic excavator 11 Support strength when mounting a plurality of mirrors 36 and 37 on 17 can be secured.

  In particular, since the tank side plate upper portion 42 of the fuel tank 17 is bent, its rigidity is high, and it protrudes from the mounting surface portion 41 to the tank side plate upper portion 42 and is bent and fixed along the tank shape. The extended reinforcing surface portion 44 of the tank upper surface reinforcing plate 22 can further increase the rigidity of the fuel tank 17, so that it can accommodate a plurality of mirrors 36 and 37, can secure a larger tank strength, and can deform or break the tank. Can be reliably prevented. That is, the tank upper surface reinforcing plate 22 can increase the strength of the tank upper surface and suppress its deformation by bending and fixing the extended reinforcing surface portion 44 according to the highly rigid side-surface bent shape of the fuel tank 17.

  The mirrors 36 and 37 can be reliably supported by the support column portion 31 attached to the tank upper surface reinforcing plate 22 and the arm portions 33 and 34 protruding horizontally from the upper end thereof.

  An intermediate portion of the arm portions 33 and 34 is fixed to the upper end of the column portion 31 of the mirror mounting support structure 24, and the plurality of mirrors 36 and 37 can be supported in a balanced manner at the respective tips of the arm portions 33 and 34.

  The present invention can be used for a working machine such as a hydraulic excavator.

11 Hydraulic excavator as work machine
13 Upper revolving body as the aircraft
15 cab
17 Fuel tank
22 Tank top reinforcement plate
24 Mirror mounting support structure
31 Prop
33, 34 arms
36, 37 mirror
41 Mounting surface
42, 43 Tank side plate upper part
44, 45 Extended reinforcement surface

Claims (4)

The aircraft,
A cab installed on one side of the aircraft,
A fuel tank installed on the other side of the aircraft,
A tank upper surface reinforcing plate fixed to the upper surface of the fuel tank;
A mirror mounting support structure attached to the tank upper surface reinforcing plate;
A mirror attached to the mirror mounting support structure,
The tank upper surface reinforcement plate
A mounting surface portion to which the mirror mounting support structure is mounted;
A working machine comprising: a tank side plate upper portion located on the opposite side of the cab from the mounting surface portion; and an extended reinforcing surface portion projecting from another tank side plate upper portion adjacent to the tank side plate upper portion. The work machine according to claim 1, wherein the extended reinforcing surface portion protruding from the mounting surface portion to the upper part of the tank side plate located on the opposite side of the cab is bent downward along the tank shape. The mirror mounting support structure is
A column attached to the tank upper surface reinforcing plate;
The work machine according to claim 1, further comprising: a mirror mounting arm portion protruding horizontally from an upper end of the support column portion. The middle part of the arm is fixed to the upper end of one strut,
The work machine according to claim 3, wherein mirrors are respectively attached to both ends of the arm portion.

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