JP6475180B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle, and more particularly, to a structure that holds a lid on which a driver's seat that opens and closes an opening provided in a driver's seat support base is held in an open state.

  Conventionally, there exists what was disclosed by patent document 1 as one form of a working vehicle. That is, Patent Document 1 discloses a driver seat support base having openings on the ceiling surface portion and the front surface portion, and a rear end edge portion pivotally supported on the driver seat support base to open and close the opening portions on the ceiling surface portion and the front surface portion. A turning work vehicle is disclosed that includes an L-shaped lid body that can be freely closed and viewed from the side, and a driver seat that is placed on the upper surface of the lid body.

  And while providing a protruding piece having a pin insertion hole that opens in the left-right direction at the rear side of the lower left side of the lid, on the left side of the lid, a fixing pin that is elastically urged to the right is disposed, By inserting the fixing pin into the pin insertion hole so that it can be freely inserted and removed, the lid body can be held in the open posture, while the lid body is pulled out from the pin insertion hole against the elastic bias. The lid can be closed.

JP 2007-217892 A

  However, in Patent Document 1, since the fixing pin is inserted into the pin insertion hole so as to be freely inserted and removed, it is necessary to match the position of the pin insertion hole with the tip of the fixing pin. The work of matching must be carried out by looking into the lower left side of the driver's seat.

  Accordingly, an object of the present invention is to provide a work vehicle that can easily and firmly hold a lid on which a driver's seat is placed in an open posture.

The invention described in claim 1
A driver's seat support base having an opening in the ceiling surface portion, a lid that pivotally supports a rear end edge portion on the driver's seat support base so that the opening can be freely opened and closed, and a driver's seat mounted on the upper surface of the lid and, a work vehicle equipped with,
An opening holding piece that is provided on the lower surface of the lid and can be moved forward and backward toward the rear edge of the opening, and a rear edge of the opening that receives the tip of the opened opening holding piece. Have
Open lid holding piece
A use posture for holding the lid body in the open state by bringing the leading edge that has been advanced into contact with the rear edge of the opening,
A non-use posture that allows the lid to be closed by separating the tip from the rear edge of the opening by operating backwards,
The posture can be freely changed.

  According to the first aspect of the present invention, the front end portion that has been moved forward is brought into contact with the rear edge portion of the opening portion, so that the cover body is held in the open state, and the front end portion is moved backward. Since the opening holding piece can be freely changed to the non-use posture that allows the lid to be closed by separating the opening from the rear edge of the opening, the driver's seat It is possible to easily and firmly hold the lid body on which the lid is placed in the open lid posture.

The invention according to claim 2 is the invention according to claim 1,
The front end portion of the opening lid holding piece includes a holding piece side engaging portion that engages with the rear edge portion of the opening.

  In the invention according to claim 2, since the tip end portion of the lid opening holding piece includes the holding piece side engaging portion that engages with the rear edge portion of the opening portion, the lid opening holding piece is firmly held in the use posture. Can be made.

Invention of Claim 3 is invention of Claim 1 or 2, Comprising:
The rear edge of the opening includes an opening-side engaging portion that engages with the tip of the lid-holding piece.

  In the invention according to claim 3, since the rear edge of the opening includes the opening side engaging portion that engages with the tip of the opening holding piece, the opening holding piece is used more firmly. It can be held in a posture.

Invention of Claim 4 is invention of any one of Claims 1-3, Comprising:
The open lid holding piece pivotally supports the base end of the lid so that it can swing along the lower surface of the lid,
While attaching the locked piece to the lid holding piece,
Attach a locking piece to the bottom of the lid,
The locking piece can be locked in a state where it is swung in a direction in which the locked piece of the open lid holding piece in the non-use posture is brought close to the locking piece.

  In the invention according to claim 4, the locked piece attached to the opening holding piece is brought close to the locking piece attached to the lower surface of the lid body, and the locked piece of the opening holding piece in the non-use posture is approached. Since it can be locked in a state where it is swung in the direction in which it is swung, it is possible to prevent the opening lid holding piece from swung inadvertently and adopting a use posture in which the tip end abuts against the rear edge of the opening. Can do.

Invention of Claim 5 is invention of any one of Claims 1-4, Comprising:
The lid has a regulating piece that regulates further opening from the position where the lid is opened to a predetermined position.

  In the fifth aspect of the invention, since the lid body that has been opened to a predetermined position has a restricting piece that restricts the lid body from being further opened, the driver's seat placed on the upper surface of the lid body has another seat. Interference with components can be prevented.

  ADVANTAGE OF THE INVENTION According to this invention, the working vehicle which can hold | maintain the cover body in which the driver's seat was mounted in the open cover attitude | position simply and firmly can be provided.

The left view of the work vehicle which concerns on this embodiment. The right view of the work vehicle which concerns on this embodiment. The partially cutaway top view of the work vehicle which concerns on this embodiment. The perspective view from the upper left side of the driver's seat support stand and the side column in a state where the lid is closed. The perspective view from the lower right side of the driver's seat support stand and the side column in a state where the lid is closed. The perspective view from the upper left side of the driver's seat support stand and the side column in a state where the lid is opened. The perspective explanatory view of the use posture of the lid opening holding piece as a 1st embodiment. The perspective explanatory view of the lid holding piece as a 1st embodiment attached to the lid. The perspective explanatory view of the non-use posture of the lid holding piece as the first embodiment. The perspective view of the control piece which controls a cover body. The expansion perspective view of the control piece which controls a lid. Side explanatory drawing of the use attitude | position and non-use attitude | position of an open lid holding piece as 1st Embodiment. The perspective explanatory drawing of the use attitude | position of the open lid holding piece as 2nd Embodiment, and a non-use attitude | position. The perspective explanatory drawing of the use attitude | position of the open lid holding piece as 3rd Embodiment, and a non-use attitude | position.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 is a work vehicle according to the present embodiment. First, the overall configuration of the work vehicle A will be described, and then the characteristic configuration of the present embodiment will be described.

[Explanation of the overall configuration of the work vehicle]
As shown in FIGS. 1 to 3, the work vehicle A includes a self-propelled vehicle body 1 including an excavation work unit 2 and a soil removal work unit 3. Then, the excavation work unit 2 can excavate the earth and sand on the excavated soil surface and discharge the excavated earth and sand to a predetermined position. Moreover, the earth and sand piled up on the ground can be discharged by the soil removal working unit 3. That is, the work vehicle A can perform excavation work and soil removal work.

  The vehicle body 1 includes a pair of left and right crawler type traveling units 10, 10, a swivel support unit 11 installed between the travel units 10, 10, and a swivel table 12 that is pivotably mounted on the swivel support unit 11. The driving unit 13 mounted on the left side of the swivel base 12, the motor unit 14 mounted on the swivel base 12 in the lower rear part of the driving unit 13, and the swivel base 12 adjacent to the right side of the driving unit 13. And a tank storage unit 15 mounted on the upper right side.

  The operation unit 13 is disposed in a cabin 16 formed of a transparent material in a box shape. A flat floor 50 is stretched at the front and a stepped driver seat support base 51 is disposed at the rear. A side operation unit 52 is provided on the right side of the floor 50 and the driver seat support base 51.

  A pair of left and right steering operation levers 53, 54 are provided upright at the front center of the floor 50, and a brake pedal 55 is disposed near the left side of the left steering operation lever 53. On the other hand, an accelerator pedal 56 is disposed in the vicinity of the right side of the right steering operation lever 54.

  As shown in FIG. 4, the driver seat support base 51 includes a front support portion 58 that supports the driver seat 57 that can be tilted backward, a rear support portion 60 that supports the driver seat 57 tilted rearward, It is formed in a staircase shape. The front stage support part 58 is formed in a stepped shape higher than the floor part 50, and the ceiling surface part 59 is formed on a horizontal flat surface. The rear stage support part 60 is formed in a stepped shape higher than the front stage support part 58, and the front surface part 61 is formed on a flat surface inclined backward. A motor unit 14 and the like are disposed below the driver seat support base 51, and the motor unit 14 and the like can be visually recognized through the opening 62, and further maintenance can be performed.

  The ceiling surface portion 59 is formed with a rectangular opening 62 that opens in the vertical direction. The opening 62 is closed by a lid 63 that forms a part of the ceiling surface portion 59. The lid 63 pivotally supports a rear end edge portion on the front surface portion 61 of the rear support portion 60 via a pair of left and right pivot portions 64 and 65 (see FIG. 11). The front end edge side of 63 can be freely opened and closed in the vertical direction, and the opening 62 can be opened and closed by the lid 63.

  A driver's seat 57 is placed on the upper surface of the lid 63, and the driver's seat 57 has a seat portion 66 placed on the lid 63 and a lower edge on the rear edge of the seat 66. It is pivotally supported, and the upper edge portion side is formed from a backrest portion 67 that can be tilted and adjusted in the front-rear direction.

  A left operation lever 70 is disposed near the left side of the driver seat 57, while a right operation lever 71 is disposed near the right side of the driver seat 57, and these left and right operation levers 70, 71 are used. The excavation work unit 2 can be operated. Reference numeral 72 denotes a cut-off lever that cuts the pilot oil of the operation lever that operates the working unit via a switch, and reference numeral 73 denotes a soil removal operation lever that operates the soil removal work unit 3.

  The excavation work unit 2 is provided with a bracket support 20 at the front end of the swivel base 12. A boom support bracket 21 is attached to the bracket support 20 so as to be swingable left and right about an axis in the vertical direction, and a left and right swing cylinder 17 is interposed between the boom support bracket 21 and the swivel base 12 to The boom support bracket 21 can swing left and right by the swing cylinder 17. The boom support bracket 21 has a base end portion (lower end portion) of a boom 22 that is formed in a “<” shape when viewed from the side by extending in the vertical direction, and is pivoted via a boom support shaft 23 having an axis line in the left-right direction. The branch is connected. A boom cylinder 24 is interposed between the front end portion of the boom support bracket 21 and the middle portion of the boom 22, and the boom 22 can be moved up and down by the boom cylinder 24. A base end portion (upper end portion) of an arm 25 formed by extending vertically in a vertical direction is pivoted to a distal end portion (upper end portion) of the boom 22 via an arm support shaft 26 having an axis line in the left-right direction. The branch is connected. An arm cylinder 27 is interposed between the base end of the arm 25 and the middle part of the boom 22, and the arm 25 can swing back and forth by the arm cylinder 27. The upper end of a pair of left and right bucket brackets 29 provided on the rear base portion (front end portion) of the bucket 28 is pivotally supported at the distal end portion (lower end portion) of the arm 25 via a bucket support shaft 30 whose axis is directed in the left-right direction. It is connected. Between the lower part of the bucket bracket 29 and the base end of the arm 25, a bucket cylinder 32 is provided via a bucket link mechanism 31, and the bucket 28 can swing up and down by the bucket cylinder 32.

  As shown in FIGS. 1 to 3, the earth removal working unit 3 pivotally connects the base end portions of a pair of left and right earth discharge plate support arms 40, 40 to the swivel support unit 11 to support both earth discharge plates. The front ends of the arms 40, 40 are swingable, and between the front ends of the two soil removal plate support arms 40, 40, a long soil discharge plate 41 is installed in the left-right direction. 41 enables the earth removal work. Reference numeral 42 denotes a soil discharge plate cylinder.

[Description of Characteristic Configuration of this Embodiment]
Next, a characteristic configuration of the present embodiment will be described with reference to FIGS. That is, in this embodiment, the lid holding piece 80 as the first embodiment is provided on the lower surface of the lid 63 and can be moved forward and backward toward the rear edge portion 68 of the opening 62, and the opened opening operated. And a rear edge 68 of the opening 62 that receives the tip 81 of the lid holding piece 80.

  The lid-opening holding piece 80 can be changed in posture between a use posture (a) and a non-use posture (b). The usage posture (a) of the opening-holding piece 80 is that the lid 63 is held in the open state by bringing the leading edge 81 that has been advanced into contact with the rear edge 68 of the opening 62. It is the posture used as a stand. The non-use posture (b) of the lid-opening holding piece 80 is a non-contact state in which the front-end portion 81 is separated from the rear edge portion 68 of the opening 62 by retreating the lid-opening holding piece 80. Thus, the lid 63 can be closed without being used as an opening stand.

  Therefore, the lid 63 on which the driver's seat 57 is placed can be easily and firmly held in the open posture by the open lid holding piece 80 in the use posture (a). Therefore, the opening 62 can be held in an open state, and the motor unit 14 and the like disposed below the driver seat support base 51 can be visually confirmed through the opening 62 and further maintenance can be performed.

  More specifically, the open lid holding piece 80 has a base end portion of the main piece 80a through a pivot 88 whose axis is oriented in a direction orthogonal to the lid 63 at the central opening on the back surface of the lid 63. 84 is pivotably supported along the lower surface of the lid 63.

  The lid-opening holding piece 80 traverses from a main piece 80a formed in a longitudinal rectangular plate shape in the front-rear direction, and left and right side pieces 80b, 80b extending perpendicularly from the left and right edges of the main piece 80a. It is formed in a U-shaped surface. The rear end portions of the left and right pieces 80b and 80b respectively extend downward to form the protruding pieces 80c and 80c. The upper end surfaces of the projecting pieces 80c and 80c and the upper portions of the rear end surfaces of the left and right pieces 80b and 80b form bowl-shaped recesses, and these recesses are provided in the distal end portion 81 of the opening holding piece 80. Holding one side engaging portions 82 and 82 are provided.

  The rear edge portion 68 of the opening 62 includes an opening side engaging portion 83 that engages with holding piece side engaging portions 82, 82 provided on the distal end portion 81 of the open lid holding piece 80. The opening-side engaging portion 83 has a lateral width that allows the holding piece-side engaging portions 82 and 82 of the lid-opening holding piece 80 to be fitted at the center of the rear edge portion 68 of the opening 62 and toward the rear. It is formed in a concave shape.

  Therefore, by engaging the holding piece side engaging portions 82, 82 of the opening holding piece 80 with the opening side engaging portion 83 so as to be detachable, the opening holding piece at the rear edge 68 of the opening 62. 80 can be held firmly in a use posture.

  While the latched piece 85 is attached to the lid holding piece 80, the latch piece 86 is attached to the lower surface of the lid 63, and the latch piece 86 is in the non-use posture (b). The holding piece 80 can be locked in a state where the locked piece 85 is swung (rotated 180 degrees) in a direction in which the holding piece 85 approaches. That is, a notch 89 is formed in the middle of the front-rear direction (longitudinal direction) of the left piece 80b, and the notch 89 is bent outward. On the cutout portion 89, a locked piece 85 opening in a C shape is attached. The locking piece 86 is formed in a gate shape and is suspended from the lower surface of the lid 63. Then, a latched piece 85 that opens in a C-shape is fitted in the middle portion of the latch piece 86 formed in a gate shape, and the lid is held open via the latched piece 85 to the latch piece 86. The piece 80 is locked. Therefore, it is possible to prevent the lid-opening holding piece 80 from inadvertently swinging and adopting a use posture in which the tip end abuts against the rear edge 68 of the opening 62.

  The lid 63 has a regulating piece 87 that regulates further opening from a position where the lid 63 is opened to a predetermined position (for example, a depression angle of 45 degrees). That is, the regulation piece 87 is formed in a plate shape extending in the front-rear direction and is formed along the rear shape of the upper surface of the lid 63. A contact piece 87a is formed at the rear end portion of the restriction piece 87, and a buffer pad 87b formed of an elastic material is attached to the rear surface of the contact piece 87a. When the lid 63 is opened to a predetermined position, the abutting piece 87a contacts the front surface portion 61 of the rear support portion 60 formed on the rearward inclined flat surface via the pad 87b. By contacting, the lid 63 is restricted from being opened rearward. Therefore, the driver's seat 57 mounted on the upper surface of the lid 63 can be prevented from being moved more than necessary and interfering with other components.

  When using the lid-holding piece 80 configured as described above, for example, one worker opens the lid 63 to a predetermined position with the pivot portions 64 and 65 as fulcrums. At this time, on the back surface of the lid 63, the lid-opening holding piece 80 is in the non-use posture (b) in a state where the locked piece 85 is locked to the locking piece 86. Subsequently, in a state where the lid 63 that has been opened is supported by one hand, the locked piece 85 is unlocked from the locking piece 86 by the other hand, and the distal end portion 81 of the opening holding piece 80 is The advancing operation (rotated 180 degrees) is performed so that the rear edge 68 of the opening 62 is directed. And the holding piece side engaging parts 82 and 82 which the front-end | tip part 81 comprises are engaged with the opening part side engaging part 83 which the rear edge part 68 of the opening part 62 comprises. In this manner, the lid-opening holding piece 80 can be firmly held in the use posture (a) at the rear edge 68 of the opening 62 and is disposed below the driver seat support 51 through the opening 62. Visual recognition of the prime mover unit 14 and the like, and maintenance can be performed. Further, when the lid-opening holding piece 80 is set to the non-use posture (b), the lid 63 is slightly rotated to the lid-opening side, and the opening-side engaging portion 83 and the holding piece-side engaging portions 82 and 82 are rotated. Release the engagement. After that, the procedure opposite to the procedure for setting the open lid holding piece 80 to the use posture (a) is followed.

[Description of Configuration of Opening Cover Holding Piece as Second Embodiment]
FIG. 13 shows an open lid holding piece 90 as the second embodiment. The opening and holding piece 90 as the second embodiment has the same basic structure as the opening and holding piece 80 as the first embodiment, but the opening and holding piece 90 and the opening and holding piece 80 are The operating directions in which they advance and retract are different.

  That is, the open lid holding piece 90 as the second embodiment pivotally supports the base end portion 84 via the pivotal support body 91 at the rear surface rear portion of the lid body 63. The pivot body 91 includes a mounting piece 91a extending in the left-right direction, a pair of left and right pivot supporting pieces 91b, 91b suspended from the left and right ends of the mounting piece 91a, and a left-right direction between both pivot supporting pieces 91b, 91b. And a pivot shaft 91c attached in a horizontal manner with its axis facing the axis. The base end portion 84 of the lid holding piece 90 is rotatably attached to the pivot shaft 91c. A locked piece 85 is attached to the upper surface of the main piece 80 a of the opening holding piece 80, while a locking piece 86 is attached to the lower surface of the lid 63, and the pivot shaft 91 c is attached to the locking piece 86. The latched piece 85 of the lid-opening holding piece 80 that is in the non-use posture (b) at the center can be latched in a state where it is swung (rotated 180 degrees) in the approaching direction.

  In the lid-holding piece 90 configured as described above, similarly to the lid-opening holding piece 80, the opening-side engaging portion 83 provided on the rear edge 68 of the opening 62 is engaged with the holding piece-side engagement provided on the tip 81. By engaging the joint portions 82, 82, the lid-opening holding piece 90 can be firmly held in the use posture (a) at the rear edge portion 68 of the opening 62. By following the procedure opposite to the procedure for setting the open lid holding piece 90 to the use posture (a), the open lid holding piece 90 can be set to the non-use posture (b).

[Description on Configuration of Opening Holding Piece as Third Embodiment]
FIG. 14 shows an open lid holding piece 100 as a third embodiment. The opening and holding piece 100 as the third embodiment has the same basic structure as the opening and holding piece 80 as the first embodiment, but the opening and holding piece 100 that slides forward and backward, The open lid holding piece 80 that moves forward and backward moves and moves differently. Moreover, in 3rd Embodiment, the to-be-latched piece 85 and the latching piece 86 which 1st, 2nd embodiment comprises are not provided.

  That is, the open lid holding piece 100 as the third embodiment is attached to the rear rear portion of the lid 63 through the slide guide body 110 so as to be slidable in the front-rear direction. The slide guide body 110 is formed in a rectangular tube shape that opens in the front-rear direction, and is formed so that the lid-opening holding piece 100 can be taken in and out of the slide guide body 110. Slide guide holes 120 and 120 are formed in the left and right side surfaces of the slide guide body 110, respectively. The slide guide hole 120 includes a front / rear extending hole 122 extending in the front / rear direction, a front extending hole 124 extending upward from the front end of the front / rear extending hole 122, and a rear end of the front / rear extending hole 122. And a rear extension hole 126 extending upward from the bottom. In the slide guide holes 120, 120, a slide support shaft 130 having an axis line in the left-right direction is attached horizontally and slidably, and the slide support shaft 130 has a base end portion 84 of the opening holding piece 100. Is pivotally supported. Then, the front portion of the lid-opening holding piece 100 is accommodated in the slide guide body 110, and the slide support shaft 130 is disposed in the engaged state at the upper end portion of the front extension hole 124, so that the lid-opening holding piece 100 Can be set to the non-use posture (b). In addition, the engagement between the upper end portion of the front extension hole 124 and the slide support shaft 130 is released, and the lid holding piece 100 is pulled out from the slide guide body 110 and is slid to the upper end portion of the rear extension hole 126. The support shaft 130 is placed in an engaged state, and the holding piece side engaging portions 82 and 82 provided at the tip portion 81 are engaged with the opening side engaging portion 83 provided at the rear edge portion 68 of the opening 62. Thus, the lid-opening holding piece 90 can be firmly held in the use posture (a) at the rear edge 68 of the opening 62. By following the procedure opposite to the procedure for setting the open lid holding piece 90 to the use posture (a), the open lid holding piece 90 can be set to the non-use posture (b).

  A: work vehicle, 50: floor, 51: driver seat support, 62: opening, 63: lid, 80: lid opening holding piece, 81: tip portion, 82: holding piece side engaging portion, 83: opening Part side engaging part, 84: base end part, 85: locked piece, 86: locking piece, 87: regulating piece, 88: pivot

Claims (5)

A driver's seat support base having an opening in the ceiling surface portion, a lid that pivotally supports a rear end edge portion on the driver's seat support base so that the opening can be freely opened and closed, and a driver's seat mounted on the upper surface of the lid and, a work vehicle equipped with,
An opening holding piece that is provided on the lower surface of the lid and can be moved forward and backward toward the rear edge of the opening, and a rear edge of the opening that receives the tip of the opened opening holding piece. Have
Open lid holding piece
A use posture for holding the lid body in the open state by bringing the leading edge that has been advanced into contact with the rear edge of the opening,
A non-use posture that allows the lid to be closed by separating the tip from the rear edge of the opening by operating backwards,
A work vehicle that can freely change its posture.   2. The work vehicle according to claim 1, wherein the front end portion of the opening-opening holding piece includes a holding piece-side engaging portion that engages with a rear edge portion of the opening.   The work vehicle according to claim 1 or 2, wherein a rear edge portion of the opening portion includes an opening side engaging portion that engages with a front end portion of the lid-opening holding piece. The open lid holding piece pivotally supports the base end of the lid so that it can swing along the lower surface of the lid,
While attaching the locked piece to the lid holding piece,
Attach a locking piece to the bottom of the lid,
The work vehicle according to any one of claims 1 to 3, wherein the work piece can be locked in a state of being swung in a direction in which the locked piece of the open lid holding piece in the non-use posture is brought close to the locking piece. .   The work vehicle according to any one of claims 1 to 4, wherein the lid body includes a restriction piece that restricts the lid from being further opened from a position where the lid is opened to a predetermined position.

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