JP5819760B2 - Bonnet opening and closing structure of turning work vehicle - Google Patents

Description

  The present invention relates to a hood opening and closing structure for a turning work vehicle.

  Conventionally, there is one disclosed in Patent Document 1 as one form of a hood opening / closing structure of a turning work vehicle. That is, in Patent Document 1, an engine or the like is arranged at the rear part on the revolving structure, the upper part of the engine or the like is covered with a seat support, the left and right sides of the engine or the like are covered with a side cover, and the rear is opened and closed A structure is disclosed that is covered by a bonnet that is freely attached. The bonnet is formed in a flat box shape, and the front end edge portion of the upper surface portion is pivotally supported around the axis in the left-right direction at the rear end edge portion of the seat support. A handle is attached to the middle part of the lower edge of the rear surface of the bonnet so that the bonnet can be opened and closed in the vertical direction around the pivotal support via the handle.

JP 2008-266983 A

  However, in the above-described hood opening and closing structure of the turning work vehicle, in order to avoid interference with the seat back portion and the like disposed on the seat support body, the range in which the hood is opened upward is limited and greatly opened. There was a problem that it was not possible. Therefore, there is a risk that an operator who maintains the head under the hood opened to bend and looks into the engine etc. may cause the head to collide with the hood when the upper body is extended after the maintenance is completed. . As a result, it is a mental burden for workers to be careful not to put their heads on the hood.

  Therefore, the present invention provides a hood opening / closing structure for a turning work vehicle that can avoid the mental burden of an operator not to put his head on the hood and can easily open and close the hood. The purpose is to do.

The bonnet opening / closing structure of the turning work vehicle according to the invention of claim 1 is a bonnet opening / closing structure of a turning work vehicle in which an engine or the like is disposed on the turning body and the engine or the like is closed by a bonnet. A bonnet is arranged along the peripheral surface of the swivel body, and one side edge of the bonnet is pivoted around an axis in the vertical direction, and the bonnet can be opened and closed laterally around the pivot. A handle is provided on the other side edge of the bonnet, and the handle is pivotally supported around an axis extending in the left-right direction by either one of the upper and lower ends of the handle body formed by extending the bonnet vertically. , It is configured so that the closure release operation of the closure lock part is interlocked with the rotation operation of the handle body around the pivotal support part, and the fingertip can be inserted between the handle body and the bonnet from either the left or right direction fingertip An insertion gap is formed, the fingertip is inserted into the fingertip insertion gap from either the left or right direction to grip the handle body, and the grip handle body is rotated around the pivot to open the bonnet. It is possible to do this.

  The bonnet opening / closing structure of such a turning work vehicle allows the bonnet to be opened / closed in the horizontal direction around the pivot, so that an operator who maintains the engine by looking into the engine, etc. extends his / her upper body after the maintenance is completed. There is no risk of the head colliding with the bonnet. As a result, it is possible to avoid the mental burden of paying attention to the operator not to put his head on the bonnet.

And on the other side edge of the bonnet, there is a handle that can be opened by inserting a fingertip from either the left or right direction, so the bonnet can be opened and closed easily from either the left or right direction. Maintenance work efficiency can be improved.
In other words, a fingertip can be inserted from either the left or right direction between the handle body and the bonnet, which are formed by extending in the vertical direction and are pivotally supported around the axis extending either the upper or lower end in the horizontal direction. Since the fingertip insertion gap is formed, the handle body can be firmly gripped by inserting the fingertip into the fingertip insertion gap, and the closure lock section can be unlocked by rotating the handle body. Can do. At this time, since the fingertip can be inserted into the fingertip insertion gap from either the left or right direction, even when the direction in which the fingertip is inserted is limited to either the left or right due to the presence of an obstacle, etc. Can be rotated.

The bonnet opening / closing structure of the turning work vehicle according to the invention described in claim 2 is the bonnet opening / closing structure of the turning work vehicle according to claim 1, wherein the handle is formed by extending the bonnet vertically. The lower end of the main body is pivotally supported about an axis extending in the left-right direction, and the closure release operation of the closure lock portion is interlocked with the pivoting operation on the upper end side of the handle body around the pivotal support, On the upper left and right sides of the handle body, a pair of left and right pressing projections are formed in a bulging shape, and by pressing the thumb of the hand holding the handle body on either pressing projection, The handle main body is rotated about the pressing convex portion as a fulcrum .

In such a bonnet opening / closing structure of the turning work vehicle, for example, when four fingers other than the right thumb are inserted into the fingertip insertion gap, the left pressing convex portion is pressed by the right thumb. The bonnet can be easily opened by gripping the handle main body with the convex portion as a fulcrum and turning. As described above, since the handle body of the bonnet can be easily opened and closed from either the left or right direction, the maintenance work efficiency can be improved.

  The bonnet opening / closing structure for a turning work vehicle according to the invention described in claim 3 is the bonnet opening / closing structure for the turning work vehicle according to claim 2, wherein the handle main body is accommodated in the other side edge of the bonnet. And a handle body is disposed in the housing recess, and a fingertip insertion gap is formed so that the handle body is not exposed outward from the bonnet surface.

  In such a bonnet opening / closing structure of the turning work vehicle, the handle body is prevented from being exposed to the outside from the bonnet surface, so that the bonnet surface can be designed as the turning radius of the turning body. That is, the housing recess can be formed by effectively utilizing the space within the turning radius. In addition, the handle main body arranged in the housing recess is not likely to be collided with other obstacles such as surrounding obstacles even when the turning body is turned, and therefore, there is no possibility of being damaged.

  According to the present invention, it is possible to avoid a mental burden that an operator is careful not to put his head on the bonnet, and the bonnet can be easily opened and closed from either the left or right direction, and maintenance can be performed. Work efficiency can be improved.

The left view of the turning work vehicle (excavation work vehicle) which concerns on this invention. The right view of the turning work vehicle (excavation work vehicle) which concerns on this invention. The front view of the turning work vehicle (excavation work vehicle) which concerns on this invention. The rear view of the turning working vehicle (excavation working vehicle) which concerns on this invention. The top view of the turning working vehicle (excavation working vehicle) which concerns on this invention. The rear side perspective view of the turning work vehicle (excavation work vehicle) which concerns on this invention. The front side perspective view of the structure on a turning body. The back side perspective explanatory drawing of the structure on a turning body. The top view of the structure on a turning body. The front side perspective view (1) of the machine frame structure of a turning body. The front side perspective view (2) of the machine frame structure of a turning body. Cross-sectional top view of a revolving structure. Open plan explanatory drawing of each cover body. Plane | planar explanatory drawing of a switching valve accommodating part and accommodating parts, such as tools. Hydraulic circuit concept explanatory drawing. An exploded perspective view (a), a left side perspective view (b), and a right side perspective view (c) of a storage box such as a tool. The front view (a), back view (b), left side view (c), right side view (d), and plan view (e) of the storage box for tools. The front view of a handle. The II sectional view taken on the line of FIG. The II-II sectional view taken on the line of FIG. The cross-sectional bottom view of the handle as another embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 is an excavation work vehicle as a turning work vehicle according to the present invention.

[Overview of overall excavation work vehicle]
As shown in FIGS. 1 to 6, the excavation work vehicle A includes a traveling machine body 1 capable of self-propelling, an excavation part 2 as a working part attached to the traveling machine body 1, and a soil discharging part 3. In the present embodiment, the excavating bucket 13 is attached as a working attachment to the tip of the working unit to form the excavating unit 2.

  The traveling machine body 1 travels straight in the front-rear direction by providing traveling hydraulic motors 4a, 4a on a pair of left and right crawler-type traveling units 4, 4 and driving the traveling hydraulic motors 4a, 4a to rotate forward and backward, respectively. It is also possible to turn in the front-rear and left-right directions, and to turn the left and right traveling parts 4, 4 in opposite directions to make a quick turn. A base 5 is interposed between the traveling units 4, 4, and a revolving body 6 is rotatably mounted on the base 5. The swivel body 6 can be swiveled in both the left and right directions around the vertical axis by a swivel motor 6a (see FIG. 12) which is a hydraulic motor. The swivel body 6 is formed in a substantially disc shape in plan view that can swivel within the left and right widths of the travel parts 4, 4 (the distance between the outer edge of the left travel part 4 and the outer edge of the right travel part 4). doing. As shown in FIGS. 7 and 8, the operating unit 7 and the tank unit 8 are disposed on the first half part, and the functional unit 9 is disposed on the second half part on the revolving body 6. The excavation part stay 10 protrudes forward at a position near one side (in the present embodiment, right side) of the revolving body 6, and the base end part of the excavation part 2 is pivotally supported by the excavation part stay 10. It is attached. The earth removal part 3 is attached to the base 5 between the pair of left and right traveling parts 4, 4.

  The excavation unit 2 includes a boom 11, an arm 12, a bucket 13, a swing cylinder 14, a boom cylinder 15, an arm cylinder 16, and a bucket cylinder 17 that rotate them.

  The excavation part stay 10 projecting to the right side of the front end portion of the swivel body 6 is pivotally supported by a pivot 23 whose axis is directed in the vertical direction, and is pivoted around the pivot 23. 18 is attached so as to be able to swing left and right. A swing cylinder 14 that expands and contracts in the front-rear direction is interposed between the right halfway portion of the swing body 6 and the right front portion of the pivot body 18, and the pivot body 18 is interlocked with the expansion and contraction operation of the swing cylinder 14. Swings (left and right swing).

  The pivot 18 is pivotally supported by a first pivot 19 that is bent in the shape of a letter “he” in a side view and extends in the vertical direction by a first pivot 19 having an axis line in the horizontal direction. The boom 11 is attached so as to be rotatable up and down around the pivot 19. A boom cylinder 15 that extends and contracts in the vertical direction is interposed between the front end of the pivot 18 and the middle part of the front surface of the boom 11, and the boom 11 moves up and down in conjunction with the expansion and contraction of the boom cylinder 15. I try to move.

  The base end portion of the arm 12 extending in the vertical direction is pivotally supported at the distal end portion of the boom 11 by the second pivot 20 having the axis line in the left-right direction, and the arm 12 is moved back and forth around the second pivot 20. It is attached so that it can rotate freely (up and down). An arm cylinder 16 extending in the front-rear direction is interposed between the first cylinder mounting body 21 attached to the middle part of the upper surface of the boom 11 and the second cylinder mounting body 22 attached to the front base end of the arm 12. Thus, the arm 12 is rotated back and forth in conjunction with the expansion and contraction operation of the arm cylinder 16.

  At the tip of the arm 12, the base of the bucket 13 is pivotally supported by a third pivot 25 whose axis is directed in the left-right direction, and the bucket 13 is pivotable back and forth around the third pivot 25 (up and down pivotable). ). A bucket link 24 is provided between the tip of the arm 12 and the base of the bucket 13, and a bucket cylinder that extends vertically between the bucket link 24 and the second cylinder mounting body 22 of the arm 12. 17, the bucket 13 is operated to rotate back and forth (up and down) in conjunction with the expansion and contraction operation of the bucket cylinder 17.

  As shown in FIGS. 1 to 6, the earth removal portion 3 can move up and down the base end portions of the pair of left and right blade arms 26, 26 extending in the front-rear direction to the base 5 between the pair of left and right traveling portions 4. A blade (soil removal plate) 27 extending in the left-right direction is installed between the tip portions of the blade arms 26 and 26. The blade 27 is formed to have substantially the same width as the width on the left and right sides of the running portions 4 and 4. Reference numeral 28 denotes a blade cylinder.

  By configuring in this way, the traveling machine body 1 is configured so that the traveling unit 4 is operated by the driving unit 7 so that it can appropriately perform straight forward and backward traveling and left and right turning traveling. And the excavation operation | work can be performed by operating the excavation part 2 with the operation part 7. FIG. Further, the earthing work can be performed by operating the earthing unit 3 with the operation unit 7.

[Description of swivel body]
As shown in FIGS. 10 to 12, the revolving unit 6 has a floor plate piece 32 disposed above a substantially front half portion of a bottom plate piece 30 formed in a substantially disk shape in plan view via a spacing machine frame 31. A flat housing space 33 having a constant interval is formed between the bottom plate piece 30 and the floor plate piece 32. Then, an operating space 34 is formed on the floor plate piece 32, a tank space 35 is formed on the right side of the bottom plate piece 30 located on the right side of the floor plate piece 32, and a functional unit is formed on the rear half of the bottom plate piece 30. A space 36 is formed.

  As shown in FIGS. 7, 8 and 13, the revolving body 6 has a lamp cover body 40 and a control valve cover body 41 in order from the left side of the excavation section stay 10 counterclockwise in plan view. , An operation pattern switching valve cover body 42, a tool storage portion cover body 43, a left lower edge peripheral cover body 44, a counterweight 45, first and second tank cover bodies 46 and 47, a right lower peripheral edge cover body 48, and The right front cover body 49 is attached to form a peripheral wall that closes the peripheral surface of the revolving body 6. Control valve cover body 41, operation pattern switching valve cover body 42, tool storage cover body 43, left lower edge peripheral cover body 44, first and second tank cover bodies 46, 47, and right lower peripheral edge cover body 48 Is formed in a circular arc shape in plan view along the peripheral edge of the swivel body 6.

  As shown in FIGS. 12 to 14, the lamp cover body 40 is detachably attached to the left front portion of the swivel body 6 via a spacing machine frame 31. The control valve cover body 41, the operation pattern switching valve cover body 42, and the tool storage section cover body 43 are formed in a horizontally-oriented rectangular plate shape that is arcuate in plan view and extends along the left side periphery of the revolving body 6. It is arranged adjacent to the periphery of the left side of the body 6. The control valve cover body 41 is detachably attached to the interval holding machine frame 31.

  As shown in FIGS. 7 and 12 to 14, the operation pattern switching valve cover body 42 and the tool etc. storage portion cover body 43 are arranged on either one of the front and rear end edges (the main part of the space holding machine frame 31). In the embodiment, the front end edge portion is pivoted around the vertical axis thereof via the first and second cover body support shafts 42a and 43a, respectively, and the other end edge portion (the main end portion) is centered on the pivot support portion. In the embodiment, the rear end edge portion is freely openable and closable in the lateral direction (in this embodiment, outward). Reference numerals 42b and 43b denote closing engagement pieces projecting from the rear end portions of the inner surfaces of the operation pattern switching valve cover body 42 and the tool or the like storage section cover body 43, and 42c and 43c are provided in the interval holding machine frame 31. An engagement receiving piece for closing. The cover bodies 42 and 43 can be held in the closed state by engaging the closing engagement pieces 42b and 43b with the closing engagement receiving pieces 42c and 43c. Reference numerals 42d and 43d denote finger hook holes provided at the respective rear end portions of the operation pattern switching valve cover body 42 and the tool or the like storage section cover body 43. The cover bodies 42 and 43 are respectively connected via the finger hook holes 42d and 43d. The cover bodies 42 and 43 can be opened by pulling forward and releasing the engagement between the closing engagement pieces 42b and 43b and the closing engagement receiving pieces 42c and 43c.

  As shown in FIGS. 8 and 13, the left lower edge peripheral cover body 44 is formed by adjoining the control valve cover body 41, the operation pattern switching valve cover body 42, and all the lower edge edges of the tool etc. storage portion cover body 43. And is attached to a plurality of cover body stays 37 projecting from the left peripheral edge of the bottom plate piece 30 in a detachable manner.

  As shown in FIGS. 6 and 8, the counterweight 45 is disposed at the rear edge of the revolving body 6 and is formed in a substantially trapezoidal plate shape having an arc shape in plan view extending along the periphery of the revolving body 6. ing.

  As shown in FIGS. 7, 12 and 13, the first and second tank cover bodies 46, 47 are formed in a horizontally long rectangular plate shape having an arc shape in plan view extending along the right side periphery of the swivel body 6. The revolving unit 6 is disposed adjacent to the periphery of the right side portion. The first tank cover body 46 has either one of the front and rear end edges around its vertical axis via a third cover body support shaft 46a attached to a bracket (not shown) welded to the hydraulic oil tank 112. An end edge portion (front end edge portion in the present embodiment) is pivotally supported, and the other end edge portion (rear end edge portion in the present embodiment) is laterally (centered outward in the present embodiment) around the pivotal support portion. It can be opened and closed freely. The second tank cover body 47 is detachably attached to the interval holding machine frame 31. The right lower edge peripheral edge cover body 48 is formed in a belt shape having the same arc width as both lower edge edges of the first and second tank cover bodies 46 and 47 arranged adjacent to each other, and protrudes from the right peripheral edge portion of the bottom plate piece 30. The plurality of cover body stays 37 are detachably attached. The right front cover body 49 is detachably attached to the right front part of the revolving structure 6 via the spacing machine frame 31.

  As shown in FIGS. 10, 12 and 14, the flat accommodating space 33 is provided with a control valve accommodating portion 51 in which the control valve unit 50 is disposed at the left front portion, and an operation pattern switching valve 52 at the left middle portion. A switching valve storage portion 53 is provided, and a tool storage portion 55 in which a tool storage box 54 storing tools and the like is provided at the rear left side.

  A control valve unit 50 is disposed in the control valve housing 51, and the control valve unit 50 controls the swing motor control valve 50a for controlling the swing motor 6a and the swing cylinder 14 as shown in FIG. A swing cylinder control valve (not shown), a boom cylinder control valve 50b for controlling the boom cylinder 15, an arm cylinder control valve 50c for controlling the arm cylinder 16, a bucket cylinder control valve 50d for controlling the bucket cylinder 17, A travel control valve (not shown) for controlling the left and right travel hydraulic motors 4a, 4a and a blade cylinder control valve (not shown) for controlling the blade cylinder 28 are integrally connected. Each control valve 50a-50d is formed by a hydraulic pilot spool valve. Each of the motors 4 a, 4 a, 6 a and the cylinders 14 to 17 is hydraulically connected to a hydraulic pump P, which will be described later, disposed in the functional unit 9 by the pressure oil pipe group 56 via the control valves 50 a to 50 d of the control valve unit 50. Connected.

  A left working unit operating lever 61, which will be described later, disposed on the left side of the seat 60 (see FIGS. 7 and 8) of the driving unit 7 enables manual operation of the decompression type left pilot valve 61a. By tilting in the front-rear direction or the left-right direction (so-called cross direction), pilot pressure is supplied from the left pilot valve 61a to each hydraulic pilot portion of the control valve unit 50 via the left pilot pipeline group 63, and the swing motor 6a And any two of the cylinders 15 to 17 can be controlled. A right working unit operating lever 62, which will be described later, disposed on the right side of the seat 60 enables the pressure reducing type right pilot valve 62a to be manually operated, and tilts the right working unit operating lever 62 in the front-rear direction or the left-right direction. Thus, the pilot pressure is supplied from the right pilot valve 62a to each hydraulic pilot portion of the control valve unit 50 via the right pilot pipeline group 64, and the remaining two of the swing motor 6a and each of the cylinders 15 to 17 are controlled. It is possible.

  As shown in FIG. 14, the control valve unit 50 disposed in the control valve housing 51 is disposed close to the control valve cover body 41. Then, by removing the control valve cover body 41 and making the lateral direction fully open, a hand can be inserted from the left outer side of the opened revolving body 6 and the control valve unit 50 can be easily maintained. . Moreover, the control valve unit 50 can be maintained by removing the left side part of the floor board piece 32 as needed and opening the control valve unit 50 directly above.

  As shown in FIGS. 8 and 14, an operation pattern switching valve 52 is disposed in the switching valve housing 53, and the operation pattern switching valve 52 is provided with a left / right pilot pipe line as shown in FIG. It is interposed in the middle part of the groups 63 and 64. The operation pattern switching valve 52 switches the combination pattern of the operation pattern and the control valves 50a to 50d when the left / right working unit operation levers 61, 62 are operated in the front-rear direction and the left-right direction, for example, to four patterns. It is. The operation pattern switching valve 52 includes a valve body 52a having a built-in direction switching valve (not shown), and a switching lever 52b as a switching unit that operates the direction switching valve in the valve body 52a. The switching lever 52b is directed toward the operation pattern switching valve cover body 42 and is disposed close to the operation pattern switching valve cover body 42.

  In this way, when the operation pattern switching valve cover body 42 is opened in the lateral direction so that the entire surface is opened, the switching lever 52b can be easily picked and switched. That is, by inserting a hand from the left outer side of the swing body 6 with the operation pattern switching valve cover body 42 opened and switching the switching lever 52b, the left and right working unit operation levers 61 and 62 can be easily operated. The combination pattern of the operation pattern and each control valve 50a-50d can be switched.

  As shown in FIGS. 8 and 14, the tool storage unit 55 effectively uses the space formed on either the left or right side of the prime mover unit 120 on the bottom plate piece 30 (left side in the present embodiment). The tool storage box 55 is provided with a tool storage box 54 that stores tools and the like. As shown in FIGS. 16 (a) to 16 (c) and FIGS. 17 (a) to 17 (e), the tool storage box 54 includes a main body 70 in a longitudinally long box shape whose upper surface is open, and a front lower portion of the main body 70. It is formed of a bulging body 69 formed by bulging a half part forward, and a lid body 72 that closes the upper surface opening 71 of the main body 70. A replacement part, a tool, and the like can be accommodated in the main body 70 and the bulging body 69 provided in communication. Screw holes 74, 74 are provided in the front and rear portions of the bottom plate portion 73 of the continuous main body 70 and the bulging body 69, and screws 75, 75 are provided on the bottom plate piece 30 in the tool storage portion 55 via the screw holes 74, 74. Removably fixed. That is, when performing the maintenance work of the functional unit 9 described later, the maintenance work can be easily performed by removing the tool box 52 from the bottom plate piece 30. The lid 72 has a ceiling 76 formed in a horizontally long rectangular plate extending in the front-rear direction, a lid side wall 77 suspended from the left edge of the ceiling 76, and suspended from the front and rear edges of the ceiling 76. It is formed from the provided right and left triangular front and rear wall portions 78 and 79.

  And while attaching the bolt 80 with a knob to the center part of the lower edge of the cover body side wall part 77, the nut 82 is provided in the upper edge center part of the body side wall part 81 of the main body 70, and the upper surface opening 71 of the main body 70 is covered with the cover body. The nut 82 and the bolt 80 with the knob which are closed by 72 and aligned in the same state can be screwed freely. When the lid 72 is removed, the tool storage box 54 is fixed to the bottom plate piece 30 with screws 75 and 75 so that the upper surface opening 71 of the main body 70 faces the tool storage box cover 43. Reference numeral 83 denotes a screw insertion hole formed in the ceiling of the bulging body 69.

  With this configuration, the tool storage section 55 is formed by effectively utilizing the space formed on the left side of the prime mover section 120 on the bottom plate piece 30, so that the revolving body 6 can be formed in a compact manner. it can. The tool storage portion 55 is formed on the left side in the revolving body 6. When the lid 72 is removed from the tool storage box 54, the upper surface opening 71 of the main body 70 is moved to the tool storage portion cover body 43. Since the screws 75 and 75 are fixed to the bottom plate piece 30 so as to face each other, tools and the like can be easily put in and out from the tool storage box 54 of the tool storage section 55 through the upper surface opening 71.

  Since the tool storage portion 55 in which the tool storage box 54 is disposed is provided at the left peripheral edge of the swivel body 6, which is a position close to the entrance / exit 91 of the operation unit 7 to be described later, By opening the accommodating portion cover body 43, tools and replacement parts can be quickly taken out from the tool accommodating box 54 of the tool accommodating portion 55. Here, since the tool storage unit 55 does not store the grease gun 115 or the like other than the tool storage box 54, the tool can be effectively used as long as it can store only the tool storage box 54. It is possible to form the same accommodating portion 55. The grease gun 115 is disposed in a tank space 35 described later.

  At this time, since the tool storage portion cover 43 can be opened and closed in the lateral direction (outward), even if the tool storage portion cover body 43 is forgotten to be closed, the tool etc. When the turning body 6 is turned in the closing direction of the housing portion cover body 43, it is automatically closed. Therefore, it is possible to reduce the possibility that the tool storage portion cover body 43 is damaged when the tool storage portion cover body is forgotten to be closed, as compared with the tool storage portion cover body disclosed in Patent Document 1 that is opened and closed in the vertical direction. Also, the tool storage portion cover body 43 has a structure in which, like the operation pattern switching valve cover body 42, the front end edge portion serves as a pivotal support portion and the rear end edge portion is opened laterally to the front side. The opening and closing operation is easy to understand.

  As shown in FIGS. 7 to 10, the driving part space 34 is formed on the floor plate piece 32 so that the front side and the left side are open, and an operator sits in the driving part space 34 to perform a driving operation. The driving part 7 is provided, and a door 91 for an operator to get on and off the driving part 7 is provided on the opened left side, and the front guard body on the wall is provided at the front end of the floor plate piece 32 in the opened front. 92 is erected.

[Description of operation unit]
As shown in FIGS. 7 to 9, the operation unit 7 arranges the front wall of the seat support base (seat mount) 93 at the rear edge of the floor plate piece 32, and seats 60 in the central part on the seat support base 93. Is placed. A left lever support case 95 is disposed on the left side of the seat 94 on the seat support base 93, while a right lever support case 96 is disposed on the right side of the seat 94. A left pilot valve 61a is disposed in the left lever support case 95 (see FIG. 15), and a left working part operation lever 61 is projected upward from the front upper part of the left lever support case 95. 61 can be tilted in the front-rear direction and the left-right direction.

  The left lever support case 95 is freely changeable between a substantially horizontal use position and a non-use position in which the left lever support case 95 is flipped up rearward and upward. Reference numeral 97 denotes a lock lever projecting forward from the front end wall of the left lever support case 95. The lock lever 97 is a hydraulic lock mechanism (not shown) when the left lever support case 95 is disposed at the use position. Is released, the hydraulic operation part is unlocked, and a recumbent posture projecting toward the entrance 91 is taken, and the operation part space 34 is blocked by the lock lever 97 to prevent the operator from getting in and out of the operation part 7. To be. On the other hand, when the left lever support case 95 is disposed at the non-use position, the hydraulic lock mechanism is activated to lock the hydraulic operation unit, and the standing posture separated from the entrance 91 side is adopted, and the operation unit space is taken. 34 is opened so that the getting on and off of the operator's driving section 7 is not hindered. Here, the hydraulic lock mechanism is configured to lock all the operations of the excavation unit 2, the soil removal unit 3, the traveling unit 4, and the swivel body 6 that are hydraulic operation units (the oil passage is cut and fixed in a stopped state). ing.

  A right pilot valve 62a is disposed in the right lever support case 96 (see FIG. 15), and the right working unit operation lever 62 is projected upward from the front upper part of the right lever supporting case 96, and the right working unit operation lever is provided. 62 can be tilted in the front-rear direction and the left-right direction.

  Immediately before the seat 94, left and right traveling levers 98, 98 extending up and down through a lever hole formed in the front center portion of the floor plate piece 32 are erected. Tilt operation is possible. The travel levers 98, 98 are hydraulically connected to the travel hydraulic motors 4a, 4a of the travel units 4, 4 via travel control valves (not shown), so that the travel levers 98, 98 are tilted in the front-rear direction. The traveling units 4, 4 can be operated by interlocking the forward / reverse operation of the traveling hydraulic motors 4 a, 4 a. Reference numeral 99 denotes an acceleration pedal provided on the floor plate piece 32 in the vicinity of the left side of the left travel lever 98, and the vehicle speed is increased by depressing the acceleration pedal 99.

  Reference numeral 104 shown in FIG. 9 denotes a boom swing operation pedal provided on the floor plate piece 32 in the vicinity of the right side of the right traveling lever 98. By depressing the left side portion of the boom swing operation pedal 104, the boom 11 is moved to the left side. While the swing operation can be performed, the boom 11 can be swung to the right side by depressing the right side portion of the boom swing operation pedal 104. The swing cylinder 14 is hydraulically connected to the boom swing operation pedal 104 via a swing cylinder control valve (not shown), and the expansion / contraction operation of the swing cylinder 14 is linked to the stepping operation on the left and right sides of the boom swing operation pedal 104. Thus, the boom 11 can be swung.

  On the right side of the right lever support case 96, an operation panel portion 100 formed with a long front and rear width and a short left and right width is disposed adjacently. A liquid crystal monitor 101 is provided in front of the upper surface of the operation panel 100, and a blade lever 102 is protruded from a midway portion so as to be tiltable in the front-rear direction, and various switch groups 103 are disposed at the rear. The blade lever 102 is hydraulically connected to the blade cylinder 28 of the soil removal unit 3 via a blade cylinder control valve (not shown), and the expansion / contraction operation of the blade cylinder 28 is interlocked with the tilting operation of the blade lever 102 in the front-rear direction. Thus, the soil removal unit 3 can be moved up and down.

  As shown in FIGS. 7 and 10, the tank space 35 is formed on the bottom plate piece 30 so as to be adjacent to the right side of the operation panel 100, and the tank portion 8 is provided in the tank space 35. Yes.

[Description of tank part]
As shown in FIGS. 7 and 12, the tank unit 8 includes a fuel tank 111 that stores fuel for driving the engine E, and a hydraulic oil tank 112 that stores hydraulic oil adjacent to each other in the front-rear direction. Yes. These tanks 111 and 112 include a front tank cover body 110 that is bent and formed on the right front cover body 49 in a curved manner, and first and second tanks disposed on the right peripheral edge of the bottom plate piece 30. Cover bodies 46, 47, an inner wall body 113 erected on the right inner side of the bottom plate piece 30, the front tank cover body 110, the first and second tank cover bodies 46, 47, and the upper edge of the inner wall body 113 It is closed by the upper surface cover body 114 disposed above.

  The upper surface cover body 114 has a rear end edge portion pivotally attached to a right upper portion of a support frame body, which will be described later, disposed in the functional portion space 36, so that the upper portions of both tanks 111 and 112 can be opened and closed. A grease gun 115 is placed on the hydraulic oil tank 112 in a horizontal shape, and the grease gun 115 is closed by an upper surface cover body 114.

  Therefore, the grease gun 115 can be easily taken out by opening the top cover body 114, and the grease gun 115 can be placed on the hydraulic oil tank 112 in a horizontal manner and the top cover body 114 is closed. 115 can be easily stored. At this time, the grease gun 115 is disposed on the hydraulic oil tank 112 at a height (ground height) that can be easily taken out and stored in an upright posture by the operator. Therefore, conventionally (for example, JP-A-8-60702), in the structure in which the grease gun is disposed at the front part in the swivel body, the operator has to bend and take out and store the grease gun. However, in this embodiment, it is possible to reduce the fatigue of the operator when the grease gun 115 is taken out and stored.

  The first tank cover body 46 is provided with a third cover body support shaft 46a on a pivot support stay 116 welded to the hydraulic oil tank 112, and a front end edge 46b is pivotally supported on the third cover body support shaft 46a. The end edge 46c can be opened laterally outward. The second tank cover body 47 is detachably attached to the pivot support stay 116 and the interval holding machine frame 31.

  As shown in FIGS. 10 to 12, the functional part space 36 is formed on the rear half of the bottom plate piece 30, and the functional part 9 is provided in the functional part space 36.

[Explanation of function part]
As shown in FIG. 12, the functional unit 9 includes a prime mover unit 120 and a support machine frame unit 121. The prime mover section 120 is formed to extend in the left-right direction. The prime mover section 120 includes an engine E disposed with its axis line directed in the left-right direction, and hydraulic operation sections (travel hydraulic motor 4a, swing motor 6a, each cylinder 14). To 17), a hydraulic pump P for pumping hydraulic oil, a radiator 123 for cooling the engine E, and the like are integrally connected. The hydraulic pump P is disposed on the leftmost side of the prime mover section 120, and the space formed on the left side of the hydraulic pump P is effectively used as a tool storage section 55 in which the tool storage box 54 is stored. Yes. Reference numeral 124 denotes a muffler cover. On the bottom plate piece 30 behind (immediately after) the engine E, a support base 125 formed in a block shape extending in the left-right direction is mounted.

  As shown in FIGS. 10 and 11, the support machine frame 121 extends from the upper right side of the rear machine frame forming piece 130 to the front lower side, and the gate-type rear machine frame forming piece 130 erected on the support base 125. And a right machine frame forming piece 131 having a tip portion connected to the floor plate piece 32. The rear machine frame forming piece 130 is formed in a gate shape by an upper horizontal frame piece 136 and left and right vertical frame pieces 137 and 138, and a canopy 132 is erected on the upper horizontal frame piece 136. The canopy 132 is composed of a canopy support piece 133, 133 formed by being raised upward and extending forward from the middle part, and a canopy 134 stretched on the both canopy support pieces 133, 133.

  Immediately after the engine E, as shown in FIGS. 8, 12, and 13, the counterweight 45 and a bonnet 140 disposed above the counterweight 45 are covered. The counterweight 45 formed in a substantially trapezoidal plate shape and the bonnet 140 formed in a horizontally long rectangular plate shape are formed in a curved shape in plan view along the peripheral surface of the revolving body 6. The bonnet 140 has a left and right width that is substantially the same as the left and right width of the counterweight 45, and a fourth cover body support shaft 127 that has an axis line directed vertically to the left vertical frame piece 137 of the rear machine frame forming piece 130. Is attached to the fourth cover body support shaft 127 via a support bracket 139 so that one end edge (the left end edge in this embodiment) of the bonnet 140 is pivotable about an axis in the vertical direction. Thus, the bonnet 140 can be opened and closed laterally backward (between the closed position extending in the left-right direction and the open position extended in the front-rear direction) with the pivotal support as the center. A handle 141 that can be opened by inserting fingertips (for example, four fingertips excluding the thumb) into the other side edge (right edge in the present embodiment) of the bonnet 140 from either the left or right direction. Is provided.

  As shown in FIGS. 18 to 20, the handle 141 includes a handle body 142 formed by extending vertically, a dish-like support body 143 that supports the handle body 142, and a lock portion attached to the support body 143. It is comprised from the body 144 and the obstruction | occlusion lock part 145 attached to the lock part attachment body 144. FIG. Then, a recess 180 is formed on the right side of the bonnet 140, and a support arrangement opening 183 is formed in the recess 180, leaving a peripheral edge 181 with a constant narrow width, which will be described later in the support arrangement opening 183. The finger insertion recess 150 of the support 143 to be inserted is inserted, and the hook-shaped piece 151 is superposed on the peripheral edge 181 of the recess 180 from behind, and the support 143 is attached to the bonnet 140.

  The handle main body 142 is formed by projecting a pivot piece 146 forward on one of the upper and lower ends (the lower end in the present embodiment) and the other one of the upper and lower ends (the upper end in the present embodiment). The locking portion interlocking piece 147 is formed to protrude forward. Upper and lower engaging protrusions 148 and 149 are formed on the upper and lower portions of the handle main body 142 so as to protrude forward.

  The support 143 is formed of a finger insertion recess 150 having a substantially square shape when viewed from the rear and opening at the rear, and a hook-shaped piece 151 formed so as to project outward from the peripheral edge of the finger insertion recess 150. Yes. The hook-shaped piece 151 is formed such that the upper and lower widths of the upper and lower portions are wider than the left and right widths of the left and right sides, and the upper insertion opening 152 is formed at the center of the upper and lower portions of the hook-shaped piece 151. And a lower insertion recess 153 is formed.

  While inserting the lock | rock interlocking | linkage interlocking piece 147 into the upper end part of the handle main body 142 in the upper insertion port 152, while inserting the pivot piece 146 formed in the lower end part of the handle main body 142 in the lower insertion recessed part 153, it is horizontal direction It is pivotally supported by a pivot pin 154 with its axis directed to the axis. An arcuate guide hole 155 centering on the pivot pin 154 is formed in the lock portion interlocking piece 147 so as to open in the left-right direction. Upper and lower engaging protrusions 148 and 149 are slidably engaged with the upper and lower portions of the peripheral surface of the finger insertion recess 150. As described above, the handle main body 142 has the center portion in the left-right direction of the finger insertion concave portion 150 attached in a vertically extending manner so that the peripheral surface of the finger insertion concave portion 150 is also operated during the pivoting operation about the pivot pin 154. The upper and lower engaging protrusions 148 and 149 are slid in an engaged state with the upper and lower portions.

  A pair of left and right spherical pressing convex portions 156 and 156 are formed in a bulging shape on the upper portion of the hook-shaped piece 151 positioned on the left and right sides of the upper portion of the handle body 142, and any one of the pressing convex portions 156. In this case, by pressing the thumb of the hand holding the handle main body 142, the handle main body 142 can be easily rotated backward using the pressing convex portion 156 as a fulcrum.

  The lock part mounting body 144 is formed in a U-shape in plan view that covers the left and right sides and the front side of the finger insertion recess 150, and faces the hook-shaped piece 151 of the support body 143 via the mounting seat 157. It is attached to.

  The blocking lock portion 145 has a base end portion of the hook piece 160 disposed between a pair of left and right hook pivot supporting pieces 158 and 158 projecting forward from the front upper portion of the bowl-shaped piece 151 and has an axis line directed in the left-right direction. It is pivotally supported by a pivot shaft 161. The base end upper portion of the hook piece 160 is connected to the lock portion interlocking piece 147 by an insertion pin 162 via an arcuate guide hole 155. An engagement piece 163 protrudes forward on the right side wall of the lock portion mounting body 144, and an engagement groove 164 extending in the front-rear direction is formed at the tip of the engagement piece 163.

  The engaged portion 170 that engages with the closing lock portion 145 has a plate-like mounting piece 171 attached to a stay 173 provided on the right vertical frame piece 138 of the rear machine frame forming piece 130, and the plate-like mounting piece 171 in the left-right direction. The base end portions of a pair of front and rear bar-like engaged pieces 172 and 172 to be extended are attached. The tips of the engaged pieces 172 and 172 are connected to each other. Then, the engagement piece 163 is engaged with the rear engagement piece 172 via the engagement groove 164 so that the rearward movement is restricted, while the front end portion of the hook piece 160 is moved forward. It engages so that it may regulate, and it is constituted so that bonnet 140 may be locked in a closed state.

  With this configuration, when the bonnet 140 is opened, the handle main body 142 is gripped, and when the pivoting pin 154 is pivoted backward, the hook piece 160 is moved via the lock portion interlocking piece 147. The tip portion is rotated upward, and the engagement state with the rear engagement piece 172 is released. That is, the closing release operation of the closing lock portion 145 is linked to the turning operation of the handle main body 142 around the pivotal support portion. As a result, the right side of the bonnet 140 can be rotated rearward, and the bonnet 140 can be opened.

  At this time, the handle main body 142 has the center part in the horizontal direction of the finger insertion recess 150 attached in a vertically extending manner, so that the handle main body 142 and the support body 143 that forms part of the bonnet 140 are used for finger insertion. A fingertip insertion gap 186 into which the fingertip can be inserted is formed between the concave portion 150 and the left and right directions. For this reason, the handle main body 142 can be properly and appropriately fixed according to the situation at that time, such as when the insertion direction of the fingertip is restricted to either the left or right due to the preference of the operator or the presence of obstacles in either the left hand or the right hand. The closure lock portion 145 can be easily released from the closure by rotating the handle main body 142 so that the handle main body 142 is pulled forward. For example, when four fingers other than the right thumb are inserted into the fingertip insertion gap 186, the left pressing projection 156 is pressed with the right thumb so that the pressing projection 156 becomes a fulcrum. As a result, the bonnet 140 can be easily opened by rotating the handle main body 142 backward. In this way, the handle body 142 of the bonnet 140 can be easily opened and closed from either the left or right direction, so that maintenance work efficiency can be improved.

  Further, since the bonnet 140 can be opened and closed laterally with the fourth cover body support shaft 127 as the center, even when an operator who has maintained while looking into the engine E etc. extends his upper body after the maintenance is completed, There is no possibility of causing the head to collide with 140. As a result, it is possible to avoid a mental burden for the operator to be careful not to put his head on the bonnet 140.

  As shown in FIGS. 18 and 19, a key lock mechanism 190 is provided in a portion of the bonnet 140 located immediately above the handle 141. The key lock mechanism 190 has a cylindrical support 191 attached to the bonnet 140, a rotary body 192 is rotatably inserted into the cylindrical support 191, and is attached to the outer end of the rotary body 192 so as to extend in the axial direction. Is provided. A restricting piece 194 is suspended from the tip of the rotating body 192. The restricting piece 194 is linked to a restricting position that hangs down directly in conjunction with the rotation of the rotating body 192, and a restriction releasing position that springs upward. The position can be changed freely. A restricting engagement piece 195 is formed at the tip of the locking portion interlocking piece 147 so as to protrude upward. The restricting piece 194 is located immediately after the restricting engagement piece 195 and at a restricting position that hangs right below. When the restricting engagement piece 195 is restricted from moving backward by the restricting piece 194, the restricting piece 194 is flipped up and disposed at the restriction releasing position. The rearward movement of the engagement piece 195 is canceled. That is, the bonnet 140 is configured to be locked / unlocked. In the present embodiment, for example, an engine key (not shown) is inserted into the keyhole 193, and the restricting position (locking position) in which the restricting piece 194 is suspended directly below the interlocking movement of the rotating body 192 by the engine key. By rotating the engine key 180 degrees around the axis of the rotator 192, it is possible to change the position to the restriction release position (unlocked position) that is flipped upward.

  With this configuration, the key lock mechanism 190 prevents each cover body from being opened by mischief. Further, since the key lock mechanism 190 is unlocked by the engine key, when the bonnet 140 is opened, the engine E can be inevitably brought into a stopped state. It is possible to prevent an unexpected accident that the 1, the excavation part 2, and the soil removal part 3 are operated.

  The key lock mechanism 190 can also be provided in each cover body 42, 43, 46. In this case, the engine key can be used as a handle for opening and closing each of the cover bodies 42, 43, 46 by being inserted into the key hole 193 of the key lock mechanism 190. Therefore, protrusions such as a handle can be eliminated from the front side of each cover body 42, 43, 46.

  As shown in FIG. 8, a left side wall forming body 196 is erected on the swivel body 6 located on the left side of the bonnet 140. The left side wall forming body 196 is formed in an arc shape from the upper end surface to the front end surface. Reference numeral 197 denotes a handrail.

  FIG. 21 shows a bonnet 140 as another embodiment, and the bonnet 140 has the same basic structure as the bonnet 140 of the embodiment described above, but the other side edge ( In this embodiment, an accommodation recess 185 for accommodating the handle main body 142 is formed on the right edge), and the handle main body 142 is arranged in the accommodation recess 185 and a fingertip insertion gap 186 is formed. The handle main body 142 is configured not to be exposed outward from the surface.

  With this configuration, the handle main body is not exposed outward from the bonnet surface, so that the surface of the bonnet 140 can be designed as the turning radius of the revolving structure 6. That is, the housing recess 185 can be formed by effectively utilizing the space within the turning radius. Moreover, the handle main body 142 disposed in the receiving recess 185 is not likely to be collided with other obstacles such as surrounding obstacles even when the swivel body 6 is swung, and therefore, there is no risk of damage. .

A excavation work vehicle 1 traveling machine body 2 excavating part 3 earth removing part 4 traveling part 52 operation pattern switching valve 52b switching lever 53 switching valve accommodating part 54 tool accommodating box 55 tool accommodating part

Claims (3)

A hood opening and closing structure of a turning work vehicle in which an engine or the like is disposed on a turning body and the engine or the like is closably closed by a hood
A bonnet is arranged along the peripheral surface of the swivel body, and one side edge of the bonnet is pivoted around an axis in the vertical direction, and the bonnet can be opened and closed laterally around the pivot.
While providing a handle on the other side edge of the bonnet ,
The handle is pivoted around the axis extending in the left-right direction by either the upper or lower end of the handle body formed by extending the bonnet in the vertical direction to rotate the handle body around the pivot. Configured to interlock the block release operation of the block lock part,
Between the handle body and the bonnet, a fingertip insertion gap is formed in which a fingertip can be inserted from either the left or right direction, and the fingertip is inserted into the fingertip insertion gap from either the left or right direction to grip the handle body. A bonnet opening / closing structure for a swivel working vehicle, wherein a bonnet can be opened by rotating a gripped handle body about a pivotal support . The handle is supported by pivoting the lower end of the handle body formed by extending the bonnet in the vertical direction around the axis extending in the left-right direction, and closing the upper end of the handle body around the pivot. Configured to interlock the lock release operation of the lock part,
On the upper left and right sides of the handle body, a pair of left and right pressing projections are formed in a bulging shape, and by pressing the thumb of the hand holding the handle body on either pressing projection, 2. A bonnet opening / closing structure for a turning work vehicle according to claim 1 , wherein the handle main body is rotated about the pressing convex portion as a fulcrum . On the other side edge of the bonnet, an accommodation recess for accommodating the handle body is formed, the handle body is disposed in the accommodation recess, and a fingertip insertion gap is formed so that the handle body is outward from the bonnet surface. The hood opening and closing structure for a turning work vehicle according to claim 1 or 2, wherein the bonnet opening and closing structure is not exposed.

Images