JP6600479B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine such as a hydraulic excavator and a wheel loader, and more particularly to a construction machine having a handrail on an upper swing body.

  In general, a hydraulic excavator, which is a representative example of a construction machine, is a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and can be raised and raised on the front side of the upper revolving body. And a working device provided.

  The upper swing body includes a swing frame that forms a support structure member, an engine mounted on the rear side of the swing frame, a fuel tank that is located on the right side of the working device and stores fuel supplied to the engine, and An oil storage tank such as a hydraulic oil tank that stores hydraulic oil to be supplied to and discharged from the work device, and a handrail that is fixed to the upper surface of the oil storage tank and ensures safety when an operator works on the upper rotating body. Yes.

  Such a handrail includes a handrail member having a grip portion extending in the front and rear directions, and leg portions respectively provided at both ends of the grip portion, and a fixing member for fixing the handrail member to the oil storage tank. (For example, refer to Patent Document 1).

JP 2010-150835 A

  By the way, the handrail according to Patent Document 1 described above is arranged in a straight line so as to extend in the front and rear direction of the vehicle body on the oil storage tank. In addition, the two fixing members provided on the leg portions of the handrail are arranged in a straight line directly below the grip portion. Therefore, such a handrail has a problem that stability in the front and rear directions is high, but stability in the left and right directions is low.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a construction machine provided with a handrail having high stability in the front, rear, left, and right directions.

The construction machine according to the present invention comprises a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a work device provided on the upper revolving body so as to be able to be lifted and lowered. The upper swing body has a bottom plate and left and right vertical plates provided on the bottom plate, is positioned on the front side of each vertical plate, the swing frame to which the working device is attached, and the rear of the swing frame An engine mounted on the side, an oil storage tank disposed outside one of the vertical plates, and extending forward and rearward along the oil storage tank, and fixed to the upper surface of the oil storage tank a construction machine equipped with at least two c Ndoreru, each handrail, front legs before respectively provided at both ends of the grip portion and the grip portion extending rearwardly, have a rear leg portion front a front handrail disposed in the front, extends in the rear direction That the legs before both ends respectively provided in the grip portion and the grip portion, is constituted by the side handrail after being placed in the rear than the front handrail has a rear leg, each handrail A front fixing member provided at a front leg portion of the front handrail, a front middle fixing member provided at a rear leg portion of the front handrail, and a rear middle provided at a front leg portion of the rear handrail. It is fixed to the oil storage tank by four fixing members including a side fixing member and a rear side fixing member provided on a rear leg portion of the rear handrail, and the rear leg portion and the rear side of the front handrail. front legs of the side handrail is fixed by a fastening member, at least one of the fixed member of said rear in side fixing member and the front-middle-side fixing member is left with respect to other fixed member, right Front at a position shifted in the direction Oil storage is fixed to the tank, of the rear legs and the front legs of the rear handrail of the front handrail, at least one fixing member legs are provided, on a vertical leg extending downwardly Part and a horizontal leg bent leftward and rightward from the lower end of the vertical leg and extending the upper surface of the oil storage tank leftward and rightward and provided with the fixing member on the tip side. It is characterized by being formed .

According to the present invention, each handrail (front handrail and rear handrail) formed with a simple structure by a gripping portion and legs provided at both ends of the gripping portion is integrated with a fastening member. I am letting. Thereby, since the load concerning one handrail can be disperse | distributed also to the leg part of another handrail, stability can be made high. Further, of the four fixing members fixed to the oil storage tank, at least one of the front middle fixing member and the rear middle fixing member is shifted to the left and right with respect to the other fixing members. It is fixed to the oil storage tank. As a result, the left and right loads applied to each handrail can be received by the fixing members shifted in the left and right directions, and the front and rear loads can be received by other fixing members. . Thereby, the stability with respect to the front, back direction, left, and right direction of each handrail can be improved.

It is a front view which shows the hydraulic excavator applied to embodiment of this invention. It is the perspective view which looked at the goods storage case, fuel tank, hydraulic oil tank, raising / lowering handrail, front side handrail, rear side handrail, etc. which were provided in the turning frame from the right front. FIG. 3 is a plan view showing an engine, an article storage case, a fuel tank, a hydraulic oil tank, a lifting handrail, a front handrail, a rear handrail, and the like provided in a revolving frame. FIG. 4 is an enlarged plan view illustrating an article storage case, a fuel tank, a hydraulic oil tank, a lifting hand rail, a front hand rail, a rear hand rail, and the like in FIG. 3. It is the perspective view which looked at the goods storage case, fuel tank, hydraulic oil tank, raising / lowering handrail, front side handrail, rear side handrail, etc. which were provided in the turning frame from the left rear. FIG. 6 is a perspective view illustrating a state in which the front handrail and the rear handrail in FIG. 5 are removed from the fuel tank and the hydraulic oil tank in a state in which the front handrail and the rear handrail are fastened by a fastening member. FIG. 5 is an enlarged plan view similar to FIG. 4 showing an article storage case, a fuel tank, a hydraulic oil tank, a lifting hand rail, a front hand rail, and a rear hand rail according to a second embodiment of the present invention. It is the perspective view which looked at the goods storage case, fuel tank, hydraulic oil tank, raising / lowering handrail, front side handrail, and rear side handrail which were provided in the turning frame from the upper right. It is a perspective view which shows the state removed from the fuel tank and the hydraulic oil tank in the state which fastened the front side handrail and the rear side handrail in FIG. 8 with the fastening member. It is a perspective view which shows the front side handrail, rear side handrail, fastening member, etc. by a modification.

The present invention belongs to a group of inventions including a plurality of inventions described below. Hereinafter, as an embodiment of the group of inventions, the first embodiment, the second embodiment, and Variations will be described. Of these, the first embodiment corresponds to the invention described in the claims.
Hereinafter, as a construction machine according to an embodiment of the present invention, a crawler type hydraulic excavator will be described as an example and described in detail with reference to FIGS. 1 to 10.

  First, FIG. 1 thru | or FIG. 6 has shown the 1st Embodiment of this invention. In FIG. 1, a hydraulic excavator 1 is a construction machine used for excavation work of earth and sand. The hydraulic excavator 1 includes a self-propelled crawler-type lower traveling body 2, an upper revolving body 3 that is turnably mounted on the lower traveling body 2, and an upside-down movable structure provided on the front side of the upper revolving body 3. The working device 4 is generally configured.

  The upper swing body 3 includes a swing frame 5, a counterweight 6, an engine 7, a cab 9, a hydraulic oil tank 10, a fuel tank 11, an article storage case 13, an elevating handrail 15, a front handrail 22, a rear A side handrail 29 and the like are provided.

  The swivel frame 5 has a thick flat plate-like bottom plate 5A extending in the front and rear directions, and a left vertical plate 5B standing on the bottom plate 5A and extending in the front and rear directions at a predetermined interval in the left and right directions. , A right vertical plate 5C, a plurality of overhanging beams 5D (only shown on the left side) and a plurality of overhanging beams 5D that extend outwardly in the left and right directions from the vertical plates 5B and 5C, and are arranged at intervals in the rear and rear directions. The left side frame 5E and the right side frame 5F are attached to the front ends of the overhanging beams 5D and are extended in the front and rear directions. Further, a bracket 5G for attaching the work device 4 is provided on the front end side of each of the vertical plates 5B and 5C, and the work device 4 is pin-coupled to the bracket 5G. It is installed so that it can be raised and lowered. On the other hand, a counterweight 6 is provided at the rear end of the revolving frame 5 to balance the weight with the working device 4.

  The engine 7 is located on the front side of the counterweight 6 and is mounted on the rear side of the turning frame 5. The engine 7 is configured as a diesel engine, and is placed on the turning frame 5 in a horizontally placed state extending leftward and rightward as shown in FIG. The hydraulic pump 8 is attached to the right side of the engine 7. The hydraulic pump 8 is driven by the engine 7 to discharge hydraulic oil from a hydraulic oil tank 10 described later as pressure oil toward the hydraulic actuator.

  The cab 9 is located on the left side in the left and right directions with the vertical plates 5 </ b> B and 5 </ b> C of the revolving frame 5 interposed therebetween, and is provided on the front side of the revolving frame 5. The cab 9 is carried by an operator, and a driver's seat on which the operator is seated, various operation levers, an air conditioner and the like (all not shown) are disposed.

  The hydraulic oil tank 10 is disposed on the outer side (right side) of the right vertical plate 5C among the vertical plates 5B and 5C of the revolving frame 5 on the front side of the engine 7. This hydraulic oil tank 10 is formed as a rectangular parallelepiped pressure-resistant tank extending in the upward and downward directions, and constitutes an oil storage tank of the present invention. A supply port 10 </ b> B for supplying hydraulic oil is provided on the upper surface 10 </ b> A of the hydraulic oil tank 10.

  In addition, a rear middle pedestal 10C is provided on the inner side in the left and right directions (on the right vertical plate 5C side) on the front end side of the upper surface 10A. As shown in FIG. 4, the rear middle pedestal 10C is provided at a position shifted from the rear pedestal 10D, the front pedestal 11C, and the front middle pedestal 11D, which will be described later, by a length dimension A to the left. The rear middle pedestal 10C is formed with two female screw holes (not shown) for fixing a rear middle fixing member 31 of the rear handrail 29 described later, spaced apart in the left and right directions. On the other hand, on the rear end side of the upper surface 10A, a rear pedestal 10D is provided on the outside (right side) in the left and right directions. The rear pedestal 10D is formed with two female screw holes (not shown) for fixing a rear side fixing member 33 of a rear side handrail 29 described later, spaced apart in the left and right directions.

  The fuel tank 11 is disposed outside the right vertical plate 5 </ b> C among the vertical plates 5 </ b> B and 5 </ b> C of the revolving frame 5 on the front side of the hydraulic oil tank 10. The fuel tank 11 is formed as a rectangular parallelepiped pressure-resistant tank extending upward and downward, and constitutes the oil storage tank of the present invention together with the hydraulic oil tank 10. On the upper surface 11A of the fuel tank 11, a supply port 11B for supplying fuel is provided.

  A front pedestal 11C is provided on the outer side (right side) in the left and right directions on the front end side of the upper surface 11A. On the front end side of the front pedestal 11C, two female screw holes (not shown) for fixing an upper fixing member 19 of an elevating handrail 15 described later are formed spaced apart in the left and right directions. On the rear end side of the front pedestal 11C, two female screw holes (not shown) for fixing a front fixing member 24 of the front handrail 22 to be described later are formed spaced apart in the left and right directions.

  On the other hand, a front middle pedestal 11D is provided outside the left and right directions on the rear end side of the upper surface 11A. Two front screw holes (not shown) for fixing a front middle fixing member 26 of the front handrail 22 described later are formed in the front middle base 11D.

  In this case, the front pedestal 11C and the front middle pedestal 11D provided on the upper surface 11A of the fuel tank 11 and the rear pedestal 10D provided on the upper surface 10A of the hydraulic oil tank 10 are provided in a straight line in the front and rear directions. It has been. On the other hand, the rear middle pedestal 10C provided on the upper surface 10A of the hydraulic oil tank 10 is provided at a position shifted by a length dimension A from the front pedestal 11C, the front middle pedestal 11D, and the rear pedestal 10D to the left (inner side). It has been. In other words, the rear middle pedestal 10C is provided at a position shifted to the left so as to be orthogonal to a straight line connecting the front pedestal 11C, the front middle pedestal 11D, and the rear pedestal 10D.

  The lowermost step 12 is provided so as to protrude from the right front end of the revolving frame 5. The lowermost step 12 is formed in a flat box shape on which an operator can put his / her foot, and is positioned on the front side of an article storage case 13 described later. The lowermost step 12 and the upper step 14 which will be described later constitute a stair when the operator moves up and down on the upper swing body 3.

  The article storage case 13 is located in front of the fuel tank 11 and is provided on the right front side of the revolving frame 5. A tool or the like can be stored in the article storage case 13. The upper surface and the front surface of the article storage case 13 are a plurality of upper steps 14 provided in a step shape. The upper step 14 extends forward and rearward between the upper end of the front surface of the fuel tank 11 and the front end of the revolving frame 5.

  Here, the upper step 14 is composed of two steps, and is disposed between the lower step plate 14A disposed on the upper side of the lowermost step 12, and the lower step plate 14A and the upper surface 11A of the fuel tank 11. And an upper step plate 14B. As a result, the operator can easily ascend onto the upper swing body 3 by stepping on the step plates 14A and 14B of the lowermost step 12 and the upper step 14 in order from the lower traveling body 2.

  Next, the lifting handrail 15 to be gripped when the worker moves up and down to the lowermost step 12 and the upper step 14 will be described.

  The elevating handrail 15 is disposed between the front end of the revolving frame 5 and the fuel tank 11 along the outside of the article storage case 13. The lifting handrail 15 is secured when the worker moves up and down on the upper swing body 3 using the lowermost step 12 and the upper step 14 as a foothold, thereby ensuring safety during lifting. The lifting handrail 15 includes a handrail member 16, a lower fixing member 17, an upper fixing member 19, and a reinforcing member 21.

  The handrail member 16 is formed by bending a cylindrical pipe member or the like, and extends from the front end of the revolving frame 5 to the front end of the fuel tank 11. The handrail member 16 extends from the right side of the lowermost step 12 toward the front at the front end of the turning frame 5 and extends upward from the front end of the front leg 16A. The gripping portion 16B extends outward and upward, and the rear leg portion 16C rises (hangs down) from the upper end of the gripping portion 16B toward the front pedestal 11C provided in the fuel tank 11.

  Further, the gripping portion 16B includes a vertical portion 16B1 extending upward from the front end of the front leg portion 16A, an inclined portion 16B2 extending rearward and upward from the front end of the vertical portion 16B1, and a rear side from the front end of the inclined portion 16B2. It is comprised by the horizontal part 16B3 extended toward. In this case, the gripping portion 16B is disposed at a position (height) that can be gripped when the operator moves up and down the lowermost step 12 and the upper step 14. That is, the operator can ensure safety by gripping the grip portion 16B when moving up and down the lowermost step 12 and the upper step 14.

  The lower fixing member 17 has a flat plate shape extending in the left and right directions, and is provided on the rear end side (base end side) of the front leg portion 16A. That is, the front leg portion 16A is fixed to the center portion of the lower fixing member 17 by welding or the like. Further, through holes (not shown) are formed in the lower fixing member 17 in the left and right directions with the front leg portion 16A interposed therebetween. The lower side (base end side) of the elevating handrail 15 is inserted into a female screw hole (not shown) provided on the front end side of the revolving frame 5 by inserting the bolt 18 through the through hole of the lower fixing member 17. It is fixed by screwing.

  On the other hand, the upper fixing member 19 is provided on the lower end side of the rear leg portion 16C. The upper fixing member 19 includes a flat plate 19A fixed to the front pedestal 11C provided in the fuel tank 11, a rear vertical plate 19B rising from the rear end of the flat plate 19A along the rear leg portion 16C, and the right end of the flat plate 19A. And a right vertical plate 19C that rises from the right side.

  A rear leg portion 16C is fixed to the central portion of the flat plate 19A by welding or the like. Further, through holes (not shown) are formed in the flat plate 19A in the left and right directions across the rear leg portion 16C. These through holes are provided at positions corresponding to the female screw holes provided in the front pedestal 11C. The rear vertical plate 19B is fixed to the rear leg portion 16C by welding or the like in the upper and lower directions. Accordingly, the rear leg portion 16C of the handrail member 16 is firmly fixed to the flat plate 19A and the rear vertical plate 19B of the upper fixing member 19 by welding or the like. On the other hand, a reinforcing member 21 described later is fixed to the right vertical plate 19C by welding or the like. The upper side (front end side) of the lifting handrail 15 is fixed to the upper surface 11A of the fuel tank 11 by inserting the bolt 20 into the through hole of the flat plate 19A and screwing into the female screw hole of the front pedestal 11C. .

  The reinforcing member 21 extends from the inclined portion 16B2 of the gripping portion 16B toward the upper fixing member 19. The reinforcing member 21 is formed of a cylindrical pipe material or the like, like the handrail member 16. The reinforcing member 21 is fixed to the inclined portion 16B2 of the gripping portion 16B by welding or the like at the front end side, extends rearward and bends midway, and the rear end side becomes a flat plate 19A and a right vertical plate 19C of the upper fixing member 19. It is fixed by welding or the like.

  Next, the work front handrail 22 fixed to the fuel tank 11 and the work rear handrail 29 fixed to the hydraulic oil tank 10 will be described.

  The work front handrail 22 extends forward and rearward along the fuel tank 11 and is fixed to the upper surface 11A of the fuel tank 11 (hereinafter, the work front handrail 22 is referred to as the front handrail 22). That is, the front handrail 22 is located outside the fuel tank 11 in the left and right directions, and is arranged so as to continue to the rear of the lifting handrail 15. The front handrail 22 is provided for safety when an operator works on the fuel tank 11. The front handrail 22 includes a handrail member 23, a front fixing member 24, a front middle fixing member 26, and a reinforcing member 28.

  The handrail member 23 is formed by bending a cylindrical pipe material or the like, similarly to the handrail member 16 of the lifting handrail 15. The handrail member 23 of the front handrail 22 includes a grip portion 23A extending in the front and rear directions, a front leg portion 23B provided at the front end of the grip portion 23A, and a rear portion provided at the rear end of the grip portion 23A. It is formed in a substantially U shape by the leg portion 23C.

  The height dimension of the gripping part 23A is substantially the same height as the horizontal part 16B3 constituting the gripping part 16B of the lifting handrail 15, and when the operator works on the upper swing body 3, It is set to a position where it can be gripped. The front leg portion 23B falls from the front end of the gripping portion 23A toward the front pedestal 11C provided on the upper surface 11A of the fuel tank 11 (hangs down). Further, the front leg portion 23B is close to the rear leg portion 16C of the lifting handrail 15. That is, the front leg portion 23B and the rear leg portion 16C are disposed adjacent to each other (side by side) in the front and rear directions. On the other hand, the rear leg portion 23C rises (hangs down) from the rear end of the grip portion 23A toward the front middle pedestal 11D provided on the upper surface 11A of the fuel tank 11.

  The front side fixing member 24 is provided on the lower end side of the front leg portion 23B. The front side fixing member 24 is substantially L by a flat plate 24A fixed to the front side pedestal 11C provided on the upper surface 11A of the fuel tank 11 and a front vertical plate 24B rising from the front end of the flat plate 24A along the front leg portion 23B. It is formed in a letter shape.

  The lower end of the front leg portion 23B is fixed to the central portion of the flat plate 24A by welding or the like. Further, a through hole 24A1 is formed in the flat plate 24A in the left and right directions across the front leg portion 23B (see FIG. 6). These through holes 24A1 are provided at positions corresponding to female screw holes provided in the front pedestal 11C. The front vertical plate 24B is fixed to the peripheral surface of the front leg portion 23B by welding or the like in the upper and lower directions. Therefore, the front leg portion 23B of the handrail member 23 is firmly fixed to the flat plate 24A and the front vertical plate 24B of the front side fixing member 24 by welding or the like. The front side of the front handrail 22 is fixed to the upper surface 11A of the fuel tank 11 by inserting the bolts 25 into the through holes 24A1 of the flat plate 24A and screwing the bolts 25 into the female screw holes of the front pedestal 11C.

  On the other hand, the front middle fixing member 26 is provided on the lower end side of the rear leg portion 23C. The front middle fixing member 26 includes a flat plate 26A that is fixed to a front middle pedestal 11D provided on the upper surface 11A of the fuel tank 11, and a rear vertical member that rises from the rear end of the flat plate 26A along the rear leg portion 23C. It is formed in a substantially L shape by the plate 26B. That is, the front middle fixing member 26 is formed in the same manner as the front fixing member 24, and is fixed to the rear leg portion 23 </ b> C in a state where it is reversed in the front and rear directions with respect to the front fixing member 24.

  The lower end of the rear leg portion 23C is fixed to the central portion of the flat plate 26A by welding or the like. The flat plate 26A is formed with through holes 26A1 in the left and right directions with only the rear leg portion 23C interposed therebetween (only one is shown in FIG. 6). These through holes 26A1 are provided at positions corresponding to the female screw holes provided in the front middle pedestal 11D. The rear vertical plate 26B is fixed to the peripheral surface of the rear leg 23C by welding or the like in the upper and lower directions. Accordingly, the rear leg portion 23C of the handrail member 23 is firmly fixed to the flat plate 26A and the rear vertical plate 26B of the front middle fixing member 26 by welding or the like. The rear side of the front handrail 22 is fixed to the upper surface 11A of the fuel tank 11 by inserting the bolts 27 through the through holes 26A1 of the flat plate 26A and screwing into the female screw holes of the front middle pedestal 11D.

  The reinforcing member 28 is located below the grip portion 23A and connects the front leg portion 23B and the rear leg portion 23C. The reinforcing member 28 is formed of a cylindrical pipe material or the like, like the handrail member 23. The reinforcing member 28 has a front end fixed to the front leg 23B by welding or the like, and a rear end fixed to the rear leg 23C by welding or the like. The reinforcing member 28 improves the strength of the front handrail 22 and also functions as a safety column provided so that an operator does not fall from the space defined by the gripping portion 23A, the front leg portion 23B, and the rear leg portion 23C. Also bears.

  The working rear handrail 29 extends forward and rearward along the hydraulic oil tank 10 and is fixed to the upper surface 10A of the hydraulic oil tank 10 (hereinafter, the working rear handrail 29 is connected to the rear hand Rail 29). That is, the rear handrail 29 is located outside the hydraulic oil tank 10 in the left and right directions, and is arranged so as to continue to the rear of the front handrail 22. The rear handrail 29 is provided for safety when an operator works on the hydraulic oil tank 10. The rear handrail 29 includes a handrail member 30, a rear middle fixing member 31, a rear fixing member 33, and a reinforcing member 35.

  The handrail member 30 is formed by bending a cylindrical pipe member or the like, similarly to the handrail member 16 of the lifting handrail 15 and the handrail member 23 of the front handrail 22. The handrail member 30 of the rear handrail 29 is provided at the gripping portion 30A extending in the front and rear directions, the front leg portion 30B provided at the front end of the gripping portion 30A, and the rear end of the gripping portion 30A. The rear leg 30C is formed.

  The height of the gripping portion 30A is substantially the same as that of the horizontal portion 16B3 constituting the gripping portion 16B of the lifting handrail 15 and the gripping portion 23A of the front handrail 22, and the operator can move the upper swing body. 3 is set to a position where it can be gripped when working. The front leg portion 30B is bent from the front end of the gripping portion 30A toward the upper surface 10A of the hydraulic oil tank 10 and from the lower end of the vertical leg portion 30B1 to the left and to the right side (left side). The horizontal leg portion 30B2 is formed in a substantially L shape.

  The vertical leg 30B1 of the front leg 30B is disposed close to the rear leg 23C of the front handrail 22. That is, the vertical leg portion 30B1 and the rear leg portion 23C are arranged adjacent to each other (side by side) in the front and rear directions. The horizontal leg 30B2 is bent at about 90 degrees with respect to the vertical leg 30B1, and extends to the vicinity (front) of the rear middle pedestal 10C provided on the upper surface 10A of the hydraulic oil tank 10. On the other hand, the rear leg portion 30C falls (hangs down) from the rear end of the gripping portion 30A toward the rear pedestal 10D provided on the upper surface 10A of the hydraulic oil tank 10.

  The rear middle fixing member 31 is provided on the front leg portion 30 </ b> B of the handrail member 30. Specifically, the rear middle fixing member 31 is provided on the front end side of the horizontal leg 30B2 of the front leg 30B. In this case, the rear middle fixing member 31 is provided at a position shifted to the left side by the length dimension A with respect to the other fixing members (the front fixing member 24, the front middle fixing member 26, and the rear fixing member 33). (See FIG. 4). That is, the rear middle fixing member 31 is arranged at a position orthogonal to the left side with respect to the front fixing member 24, the front middle fixing member 26, and the rear fixing member 33 arranged on a straight line.

  The rear middle fixing member 31 includes a flat plate 31A fixed to the rear middle pedestal 10C provided on the upper surface 10A of the hydraulic oil tank 10, and a circumferential leg of the horizontal leg 30B2 from the front end of the flat plate 31A. The front vertical plate 31B that rises is formed in a substantially L shape.

  A through hole 31A1 is formed in the flat plate 31A in the left and right directions (see FIG. 6). These through holes 31A1 are provided at positions corresponding to female screw holes provided in the rear middle pedestal 10C. At the corners of the flat plate 31A and the front vertical plate 31B, the horizontal leg 30B2 of the front leg 30B is fixed by welding or the like. That is, the left end side of the horizontal leg portion 30B2 constituting the front leg portion 30B of the handrail member 30 is firmly fixed to the flat plate 31A and the front vertical plate 31B of the rear middle fixing member 31 by welding or the like. The front side of the rear handrail 29 is fixed to the upper surface 10A of the hydraulic oil tank 10 by inserting the bolt 32 through the through hole 31A1 of the flat plate 31A and screwing into the female screw hole of the rear middle pedestal 10C. .

  Therefore, the front side of the rear handrail 29 is located on the upper surface of the hydraulic oil tank 10 at a position shifted to the left by the rear middle fixing member 31 with respect to the front fixing member 24, the front middle fixing member 26 and the rear fixing member 33. Fixed to 10A. The front handrail 22 and the rear handrail 29 are integrated by a fastening member 36 described later. As a result, the front handrail 22 and the rear handrail 29 are highly stable against loads in the left and right directions.

  On the other hand, the rear fixing member 33 is provided on the lower end side of the rear leg portion 30C. The rear side fixing member 33 is formed in the same manner as the front middle side fixing member 26. That is, the rear fixing member 33 is formed in a substantially L shape by the flat plate 33A and the rear vertical plate 33B. Further, two through holes 33A1 are formed in the flat plate 33A so as to be spaced apart in the left and right directions. The rear leg portion 30C of the handrail member 30 is firmly fixed to the flat plate 33A and the rear vertical plate 33B by welding or the like. The rear side of the rear handrail 29 is fixed to the upper surface 10A of the hydraulic oil tank 10 by inserting the bolt 34 into the through hole 33A1 of the flat plate 33A and screwing it into the female screw hole of the rear base 10D. .

  The reinforcing member 35 is located below the grip portion 30A and connects the vertical leg portion 30B1 of the front leg portion 30B and the rear leg portion 30C. The reinforcing member 35 is formed of a cylindrical pipe material or the like, similarly to the handrail member 30. The reinforcing member 35 has a front end fixed to the vertical leg 30B1 of the front leg 30B by welding or the like, and a rear end fixed to the rear leg 30C by welding or the like. The reinforcing member 35 improves the strength of the rear handrail 29 and is a safety column provided so that an operator does not fall from the space defined by the grip portion 30A, the front leg portion 30B, and the rear leg portion 30C. It also has a role.

  Next, the fastening member 36 that fixes the front handrail 22 and the rear handrail 29 will be described.

  The fastening member 36 fastens the rear leg portion 23 </ b> C of the front handrail 22 and the front leg portion 30 </ b> B of the rear handrail 29. The fastening member 36 has a substantially eyeglass shape in a plan view (viewed from above), and sandwiches the rear leg portion 23C and the front leg portion 30B in the left and right directions, so that the front handrail 22 and the rear handrail 29 Are integrated. The fastening member 36 has a left half member 36A located on the left side of the rear leg portion 23C and the front leg portion 30B, and a left half member 36A sandwiched between the rear leg portion 23C and the front leg portion 30B. And the right half member 36B facing each other.

  The left half member 36A is formed in a half cylinder shape, the front left holding part 36A1 holding the left side portion of the outer peripheral surface of the rear leg portion 23C, and the outer half surface of the front leg portion 30B formed in a half cylinder shape The rear left holding portion 36A2 that holds the left side portion, and the left connection portion 36A3 that connects the front left holding portion 36A1 and the rear left holding portion 36A2 are configured. The left connecting portion 36A3 is provided with two female screw holes 36A4 spaced apart in the upward and downward directions (see FIG. 6).

  On the other hand, the right half member 36B is formed in a half cylinder shape, the front right holding portion 36B1 that holds the right side portion of the outer circumference surface of the rear leg portion 23C, and the outer circumference surface of the front leg portion 30B that is formed in a half cylinder shape. The rear right clamping part 36B2 which clamps the right side part, and the right connection part 36B3 which connects between the front right clamping part 36B1 and the rear right clamping part 36B2 are comprised. A through hole (not shown) is formed in the right connection portion 36B3 at a position corresponding to the female screw hole 36A4 of the left connection portion 36A3.

  Then, with the rear leg 23C of the front handrail 22 and the vertical leg 30B1 of the front leg 30B of the rear handrail 29 sandwiched between the left half member 36A and the right half member 36B, the bolt 37 is The front handrail 22 and the rear handrail 29 are fastened (integrated) by being inserted through a through hole formed in the right connection portion 36B3 of the half member 36B and screwed into the female screw hole 36A4 of the left half member 36A. ). As a result, the integrated front handrail 22 and rear handrail 29 have four legs (front legs 23B and 30B, rear legs 23C and 30C), thereby improving stability. Can do.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. Next, a case where an operator performs a predetermined operation on the upper swing body 3 will be described.

  First, the worker goes up on the crawler of the lower traveling body 2 located on the right side of the hydraulic excavator 1 and grasps the handrail member 16 of the lifting handrail 15 while moving from the lowest step 12 to the lower step 14. The plate 14A and the upper step plate 14B can be used as a scaffold to ascend on the article storage case 13 so as to be raised on the upper swing body 3. The operator can move or work on the upper swing body 3 while holding the handrail member 23 of the front handrail 22 and the handrail member 30 of the rear handrail 29.

  Here, the handrail according to the prior art is arranged on a straight line so as to extend in the front and rear direction of the vehicle body on the oil storage tank. In addition, the two fixing members provided on the leg portions of the handrail are arranged in a straight line directly below the grip portion. Therefore, such a handrail has a problem that stability in the front and rear directions is high, but stability in the left and right directions is low.

  Therefore, in the handrail according to the present embodiment (the front handrail 22 and the rear handrail 29), the rear leg portion 23C of the front handrail 22 and the front leg portion 30B of the rear handrail 29 are fixed by the fastening member 36. Thus, the front handrail 22 and the rear handrail 29 are integrated. Further, four fixing members (the front side fixing member 24, the front middle side fixing member 26, the rear middle side fixing member 31, and the rear side fixing member 33) that fix the handrails 22 and 29 to the hydraulic oil tank 10 and the fuel tank 11 are provided. The three fixing members (the front side fixing member 24, the front middle side fixing member 26, and the rear side fixing member 33) are arranged in a straight line. On the other hand, the rear middle fixing member 31 is moved to the hydraulic oil tank 10 at a position shifted from the other fixing members (the front fixing member 24, the front middle fixing member 26, the rear fixing member 33) to the left by the length dimension A. It is fixed.

  Thereby, each handrail 22,29 can make stability with respect to the front, back direction and the left, right direction high. Specifically, the loads applied in the front and rear directions of the front handrail 22 and the rear handrail 29 are the front fixing member 24, the front middle fixing member 26, and the rear fixing member 33 arranged in a straight line. Are respectively supported by the front pedestal 11C, the front middle pedestal 11D, and the rear pedestal 10D.

  On the other hand, the load applied to the left and right of the front handrail 22 is fixed to the rear hand 23 because the rear leg 23C of the front handrail 22 and the front leg 30B of the rear handrail 29 are fixed by the fastening member 36. It is supported on the rear middle pedestal 10 </ b> C via a rear middle fixing member 31 provided on the front leg 30 </ b> B of the rail 29.

  The load applied to the left and right directions of the rear handrail 29 is supported by the rear middle pedestal 10C via the rear middle fixing member 31 provided on the front leg 30B. Here, for example, when the front handrail 22 and the rear handrail 29 are not fixed by the fastening member 36, the rear handrail 29 is a straight line connecting the rear middle fixing member 31 and the rear fixing member 33. The stability in the direction orthogonal to the direction (B direction shown in FIG. 6) is low. However, in the present embodiment, since the front handrail 22 and the rear handrail 29 are integrated by the fastening member 36, the load in the B direction shown in FIG. 6 is fixed on the front side provided on the front handrail 22. It is supported by the front pedestal 11C and the front middle pedestal 11D through the member 24 and the front middle fixing member 26, respectively.

  Thus, according to the first embodiment, the front handrail 22 is disposed on the upper surface 11A of the fuel tank 11, and the rear handrail 29 is disposed on the upper surface 10A of the hydraulic oil tank 10. Yes. The rear leg portion 23 </ b> C of the front handrail 22 and the front leg portion 30 </ b> B of the rear handrail 29 are fixed by a fastening member 36. Further, one of the four fixing members 24, 26, 31, 33 that fixes the handrails 22, 29 to the fuel tank 11 and the hydraulic oil tank 10 includes the other fixing members 24, 26, The hydraulic oil tank 10 is fixed to the upper surface 10 </ b> A at a position shifted to the left with respect to 33.

  Thereby, since each handrail 22 and 29 can disperse | distribute a load also to leg part 23B, 23C, 30B, 30C of the other handrail 22,29, stability can be improved. Moreover, since each handrail 22 and 29 formed with the simple structure is integrated by the fastening member 36, it can be easily set as a highly stable handrail. Further, the load in the left and right directions applied to the handrails 22 and 29 can be received by the middle fixing member 31 after shifting to the left side, and the other fixing members 24, 26, 33. Thereby, stability can be improved with respect to the front, rear direction, and left and right directions of the handrails 22 and 29.

  Next, FIGS. 7 to 9 show a second embodiment of the present invention. The feature of this embodiment is that the front handrail and the rear handrail are fixed to the oil storage tank by three fixing members, and the fixing member located on the rearmost side among the three fixing members is left, It is shifted to the right and fixed to the oil storage tank. In the second embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  The hydraulic oil tank 41 is disposed outside the right vertical plate 5 </ b> C among the vertical plates 5 </ b> B and 5 </ b> C of the revolving frame 5 on the front side of the engine 7. The hydraulic oil tank 41 is formed as a rectangular parallelepiped pressure-resistant tank extending upward and downward, and constitutes an oil storage tank of the present invention. A supply port 41 </ b> B for supplying hydraulic oil is provided on the upper surface 41 </ b> A of the hydraulic oil tank 41.

  A rear pedestal 41C is provided at the center of the front and rear directions on the left end side of the upper surface 41A. As shown in FIG. 7, the rear pedestal 41 </ b> C is provided at a position shifted from the front pedestal 11 </ b> C and the front middle pedestal 11 </ b> D provided on the upper surface 11 </ b> A of the fuel tank 11 by the length dimension C. The rear pedestal 41C is formed with two female screw holes (not shown) for fixing a rear side fixing member 49 of a rear side handrail 47, which will be described later, separated in the front and rear directions.

  The work front handrail 42 extends forward and rearward along the fuel tank 11 and is fixed to the upper surface 11A of the fuel tank 11 (hereinafter, the work front handrail 42 is referred to as the front handrail 42). That is, the front handrail 42 is disposed on the outside of the fuel tank 11 in the left and right directions so as to be connected to the rear of the lifting handrail 15. The front handrail 42 is provided for safety when an operator works on the fuel tank 11. The front handrail 42 includes a handrail member 43, a front fixing member 44, a middle fixing member 45, and a reinforcing member 46.

  The handrail member 43 is formed in a substantially U shape by a gripping portion 43A, a front leg portion 43B that rises from the front end of the gripping portion 43A, and a rear leg portion 43C that rises from the rear end of the gripping portion 43A. . On the other hand, the reinforcing member 46 connects the front leg portion 43B and the rear leg portion 43C. The front side fixing member 44 is the same as the front side fixing member 24 according to the first embodiment, and the middle side fixing member 45 is the same as the front middle side fixing member 26.

  The work rear handrail 47 is disposed on the hydraulic oil tank 41, and the rear handrail 47 extends obliquely leftward and rearward from the front end side of the hydraulic oil tank 41 so as to be connected to the rear of the front handrail 42. (Hereinafter, the working rear handrail 47 is referred to as the rear handrail 47). The rear handrail 47 is provided for safety when an operator performs operations such as refueling the hydraulic oil tank 41. The rear handrail 47 includes a handrail member 48, a rear fixing member 49, and a reinforcing member 51.

  The handrail member 48 is formed by bending a cylindrical pipe member or the like, similar to the handrail member 16 of the lifting handrail 15 and the handrail member 43 of the front handrail 42. The handrail member 48 of the rear handrail 47 is provided at the gripping portion 48A extending obliquely in the front and rear directions, the front leg portion 48B provided at the front end of the gripping portion 48A, and the rear end of the gripping portion 48A. The rear leg portion 48C is formed, and an auxiliary gripping portion 48D protruding rearward from the rear leg portion 48C.

  As shown in FIG. 7, the gripping portion 48 </ b> A extends in a straight line from the upper front end of the hydraulic oil tank 41 to the upper left of the rear pedestal 41 </ b> C toward the diagonally left rear. The height of the gripping portion 48A is substantially the same as that of the horizontal portion 16B3 of the lifting handrail 15 and the gripping portion 43A of the front handrail 42 so that the operator can work on the upper swing body 3. It is set to a position where it can be gripped when

  The front leg portion 48B falls (hangs down) from the front end of the grip portion 48A toward the upper surface 41A of the hydraulic oil tank 41. The front leg portion 48B is disposed in the vicinity of the rear leg portion 43C of the front handrail 42. That is, the rear leg portion 43C and the front leg portion 48B are arranged adjacent to each other (side by side) in the front and rear directions. Here, the front leg portion 48 </ b> B is not provided with a fixing member for fixing to the hydraulic oil tank 41. However, since the rear leg portion 43C of the front handrail 42 and the front leg portion 48B of the rear handrail 47 are fastened by a fastening member 52 described later, the front leg portion 48B of the rear handrail 47 is connected to the front handrail 42. It is indirectly supported by the front middle pedestal 11D through a middle fixing member 45 provided on the rear leg 43C.

  On the other hand, the rear leg portion 48C rises (hangs down) from the rear end of the grip portion 48A toward the rear pedestal 41C provided on the upper surface 41A of the hydraulic oil tank 41. The auxiliary gripping portion 48D is formed in a substantially U shape that protrudes rearward from the rear leg portion 48C. The auxiliary gripping portion 48D can be gripped, for example, when an operator performs maintenance on the engine 7 or the like.

  The rear side fixing member 49 is provided on the lower end side of the rear leg portion 48C. The rear side fixing member 49 includes a flat plate 49A that is fixed to a rear base 41C provided on the upper surface 41A of the hydraulic oil tank 41, and a right vertical plate 49B that rises from the right end of the flat plate 49A along the rear leg portion 48C. And is formed in a substantially L shape. That is, the rear side fixing member 49 is formed in the same manner as the front side fixing member 44 and the middle side fixing member 45, and is attached to the rear leg portion 48C in a state where the front side fixing member 44 or the middle side fixing member 45 is rotated by 90 degrees. It is a thing.

  Further, as shown in FIG. 7, the rear side fixing member 49 is provided at a position shifted to the left side by the length dimension C with respect to the other fixing members (the front side fixing member 44 and the middle side fixing member 45). . That is, the rear side fixing member 49 is arranged at a position orthogonal to the front side fixing member 44 and the middle side fixing member 45 arranged on a straight line.

  The lower end of the rear leg portion 48C is fixed to the central portion of the flat plate 49A by welding or the like. Further, a through hole 49A1 is formed in the flat plate 49A in the front and rear directions with the rear leg portion 48C interposed therebetween (see FIG. 9). These through holes 49A1 are provided at positions corresponding to the female screw holes provided in the rear pedestal 41C. The right vertical plate 49B is fixed to the circumferential surface of the rear leg portion 48C by welding or the like in the upper and lower directions. Therefore, the rear leg portion 48C of the handrail member 48 is firmly fixed to the flat plate 49A and the right vertical plate 49B of the rear side fixing member 49 by welding or the like. The rear side of the rear handrail 47 is fixed to the upper surface 41A of the hydraulic oil tank 41 by inserting the bolt 50 into the through hole 49A1 of the flat plate 49A and screwing it into the female screw hole of the rear base 41C. .

  The reinforcing member 51 is positioned below the grip portion 48A and connects the front leg portion 48B and the rear leg portion 48C. The reinforcing member 51 is formed of a cylindrical pipe material or the like, like the handrail member 48. The reinforcing member 51 has a front end side fixed to the front leg portion 48B by welding or the like, a middle portion is curved in a convex shape toward the left (right side) right side, and a rear end side is fixed to the rear leg portion 48C by welding or the like. It is formed in a substantially L shape.

  As shown in FIG. 7, a supply port 41 </ b> B of the hydraulic oil tank 41 is provided immediately below the reinforcing member 51. The reinforcing member 51 is located in the left or right direction so that it does not interfere with an oil supply nozzle (not shown) when supplying hydraulic oil to the supply port 41B of the hydraulic oil tank 41 or adversely affects its workability. Are curved in a convex shape toward the outer side (right side) and the rear side in the front and rear directions. In addition, since the reinforcing member 51 is formed in an L shape with respect to the grip portion 48A that extends in a straight line in the diagonally backward left direction, the strength of the rear handrail 47 can be further improved.

  The fastening member 52 fastens the rear leg portion 43C of the front handrail 42 and the front leg portion 48B of the rear handrail 47, and is the same as the fastening member 36 according to the first embodiment. Here, the front leg portion 48B of the rear handrail 47 is not provided with a fixing member. Therefore, by fastening the rear leg portion 43C of the front handrail 42 and the front leg portion 48B of the rear handrail 47 with the two fastening members 52, the rear leg portion 43C and the front leg portion 48B are firmly fixed. Yes. That is, the front handrail 42 and the rear handrail 47 are integrated by two fastening members 52, and by three fixing members (a front fixing member 44, a middle fixing member 45, and a rear fixing member 49). The hydraulic oil tank 10 and the fuel tank 11 are fixed.

  Thus, the second embodiment can have the same operations and effects as those of the first embodiment. That is, the front side handrail 42 and the rear side handrail 47 are fastened (integrated) by the fastening member 52, and the rear side fixing member 49 and the rear side fixing member 49 are aligned in a straight line. It is fixed to the hydraulic oil tank 41 at a position shifted inward in the left and right directions from the fixing member 45. Thereby, stability can be improved with respect to the front, rear direction, and left and right directions of the handrails 42 and 47.

  In the second embodiment described above, the front handrail 42 and the rear handrail 47 are operated by three fixing members (a front fixing member 44, a middle fixing member 45, and a rear fixing member 49). The case where it is fixed to the oil tank 10 and the fuel tank 11 has been described as an example. However, the present invention is not limited to this. For example, as in the modification shown in FIG. 10, the work front handrail 61 and the work rear handrail 62 include four fixing members (front fixing member 63, front The hydraulic oil tank 10 and the fuel tank 11 may be fixed by the middle side fixing member 64, the rear middle side fixing member 65, and the rear side fixing member 66).

  In the first embodiment described above, the rear middle fixing member 31 is fixed to the fuel tank 11 at a position shifted from the other fixing members 24, 26, 33 to the inside in the left and right directions. I gave it as an explanation. However, the present invention is not limited to this. For example, the front fixing member 24 may be shifted inward in the left and right directions, or the front middle fixing member 26 or the rear fixing member 33 may be shifted inward in the left and right directions. May be.

  Furthermore, in each embodiment, the crawler type hydraulic excavator 1 has been described as an example of the construction machine. However, the present invention is not limited to this, and can be widely applied to other construction machines such as a wheeled hydraulic excavator and a hydraulic crane.

1 Excavator (construction machine)
DESCRIPTION OF SYMBOLS 2 Lower traveling body 3 Upper revolving body 4 Working apparatus 5 Revolving frame 5A Bottom plate 5B Left vertical plate 5C Right vertical plate 7 Engine 10 Hydraulic oil tank (oil storage tank)
10A Upper surface 11 Fuel tank (oil storage tank)
11A Upper surface 12 Lowermost step 13 Article storage case 14 Upper step 15 Lifting handrail 22, 42, 61 Front handrail for work 23, 43 Handrail member 23A, 43A Grasping part 23B, 43B Front leg part 23C, 43C Rear leg part 24, 44, 63 Front side fixing member (fixing member)
26, 64 Front middle fixing member (fixing member)
29, 47, 62 Rear handrail for work 30, 48 Handrail member 30A, 48A Grip part 30B, 48B Front leg part 30C, 48C Rear leg part 31, 65 Rear middle fixing member (fixing member)
33, 49, 66 Rear side fixing member (fixing member)
36, 52 Fastening member 45 Middle fixing member (fixing member)

Claims (2)

A self-propelled lower traveling body, an upper revolving body mounted on the lower traveling body so as to be capable of swiveling, and a working device provided on the upper revolving body so as to be able to be lifted and lowered,
The upper swing body has a bottom plate and left and right vertical plates provided on the bottom plate, is positioned on the front side of each vertical plate, the swing frame to which the working device is attached, and the rear of the swing frame An engine mounted on the side, an oil storage tank disposed outside one of the vertical plates, and extending forward and rearward along the oil storage tank, and fixed to the upper surface of the oil storage tank a construction machine equipped with at least two c Ndoreru,
Each handrail, front legs before respectively provided at both ends of the grip portion and the grip portion extending rearwardly, a front handrail disposed forward have a rear leg portion, front and rear direction leg before respectively provided at both ends of the grip portion and the grip portion extending, is constituted by the side handrail after being placed in the rear than the front handrail has a rear leg,
Each handrail includes a front fixing member provided at a front leg portion of the front handrail, a front middle fixing member provided at a rear leg portion of the front handrail, and a front leg portion of the rear handrail. It is fixed to the oil storage tank by four fixing members including a rear middle fixing member provided and a rear fixing member provided on a rear leg portion of the rear handrail.
The rear leg portion of the front handrail and the front leg portion of the rear handrail are fixed by fastening members ,
At least one of the front middle fixing member and the rear middle fixing member is fixed to the oil storage tank at a position shifted to the left and right with respect to the other fixing members ,
Of the rear leg portion of the front handrail and the front leg portion of the rear handrail, the leg portion provided with the at least one fixing member includes a vertical leg portion extending upward and downward, and a vertical leg portion of the vertical leg portion. It is bent in the left and right directions from the lower end, and the upper surface of the oil storage tank extends in the left and right directions and is formed in an L shape by a horizontal leg portion provided with the fixing member on the tip side. And construction machinery. An article storage case is provided in front of the oil storage tank,
Between the front end of the swivel frame and the oil storage tank, a lowermost step provided on the front side of the article storage case, and the article located between the lowermost step and the oil storage tank. A plurality of upper steps provided stepwise on the front surface of the storage case, and an operator that moves between the front end of the swivel frame and the oil storage tank along the article storage case and moves up and down each step. The construction machine according to claim 1, wherein the construction machine is provided with an elevating handrail gripped by the machine.

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