JP2020044877A - Armrest device of work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an armrest device capable of easily adjusting the height of an armrest. SOLUTION: An accoudoir device 100 is manually operated by an accoudoir unit 110 having an armrest 111 and a holding pipe 150 capable of holding a support column member 115 of the accoudoir unit 110 so as to be movable in the vertical direction and rotatable in the horizontal direction. The armrest unit 110 is configured with a clamping tool 130 that can be fixed to and released from the holding tube 150. By releasing the fixing of the accoudoir unit 110 to the holding tube 150 by the clamp tool 130, the accoudoir unit 110 can be moved in the vertical direction or rotated in the horizontal direction with respect to the holding tube 150. [Selection diagram] FIG. 6

Description

  TECHNICAL FIELD The present invention relates to an armrest device used by an operator sitting on a seat in an operation room of a work vehicle to place an elbow.

  BACKGROUND ART Conventionally, work vehicles such as a shovel loader and a hydraulic shovel (also referred to as an excavator, a backhoe, etc.) used for excavating the ground or moving excavated earth and sand are widely known. Such a work vehicle is provided with an arm provided to be able to swing up and down on a vehicle body that is configured to be able to travel, and a bucket or a chip breaker (also simply referred to as a “breaker”) is provided at the tip of the arm. Attachments for various operations such as an auger device are configured to be detachable. By attaching and detaching the attachment according to the purpose of the work, a predetermined work can be efficiently performed.

  In such a working vehicle, an operator cabin forming an operation room in which a worker can board is provided in a central portion of the vehicle body. Inside the operator cabin, an operator seat on which an operator can sit, a travel operation lever for performing a travel operation of the vehicle body, a work operation lever for operating an arm, an attachment, and the like are arranged. Further, there is also known a work vehicle provided with an armrest device in an operator cabin for placing an elbow when an operator sitting on an operator seat operates a work operation lever or the like (for example, see Patent Document 1 below). reference).

JP-A-2017-158841

  In the armrest device of the work vehicle, there is a demand to adjust the height of the armrest for placing the elbow according to the physique and preference of the worker. An armrest device configured to be able to adjust the height of the armrest is known, but has a problem in that the adjustment requires time and effort because a tool must be used for the adjustment.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide an armrest device capable of easily adjusting the height of an armrest.

  In order to achieve the above object, an armrest device according to the present invention is an armrest device used by an operator sitting on a seat to place an elbow in an operation room of a working vehicle (for example, a hydraulic shovel 1 in the embodiment). An armrest unit having an armrest; a unit holding member (for example, a holding tube 150 in the embodiment) installed in the operation room and capable of vertically movably holding the armrest unit; And a fixture (for example, the clamp 130 in the embodiment) that is manually operated to be able to fix and release the armrest unit with respect to the unit holding member. Release the fixing of the armrest unit to the unit holding member by the Moving the hanging unit in the vertical direction, and wherein by said fastener in position after the movement to the armrest unit is configured to be capable of fixing to the unit holding member.

  In the above armrest device, the unit holding member is capable of holding the armrest unit rotatably in the left-right direction, and releases the fixing of the armrest unit to the unit holding member by the fixing tool, to the unit holding member. On the other hand, it is preferable that the armrest unit is rotated left and right, and the armrest unit can be fixed to the unit holding member by the fixing tool at the position after the rotation.

  In the above armrest device, the armrest unit extends in the up-down direction, and a lower end portion is provided at an upper end portion of the support member and the support member that is held by the holding member, and the armrest can be tilted and supported in the front-rear direction. And a tilt support mechanism.

  In the above armrest device, it is preferable that the armrest can be tilted via the tilting support mechanism until the armrest is in an upright state with respect to the support member.

  In the armrest device, an engagement portion (for example, the second slit 152 in the embodiment) that engages with each other when the fixing tool is attached to the unit holding member to prevent the fixing tool from being displaced relative to the unit holding member. , Engaging projections 131a) are preferably provided on the column support member and the fixture, respectively.

  According to the armrest device of the present invention configured as described above, the armrest unit is released from being fixed to the unit holding member by the fixture, and the armrest unit is moved vertically with respect to the unit holding member. By fixing the armrest unit to the unit holding member with the fixture, the height of the armrest can be adjusted. The fixing and release of the fixing of the armrest unit to the unit holding member by the fixing tool can be performed by manually operating the fixing tool. Therefore, according to the armrest device of the present invention, the height of the armrest can be easily adjusted.

  In the above armrest device according to the present invention, the unit holding member is capable of holding the armrest unit rotatably in the left-right direction, and releases the fixation of the armrest unit to the unit holding member by the fixture to the unit holding member. The armrest unit is rotated in the left-right direction, and the armrest unit can be fixed to the unit holding member by the fixture at the position after the rotation, so that the armrest in the left-right direction can be easily adjusted. It becomes possible.

  In the above armrest device according to the present invention, the armrest unit extends in the up-down direction, and a support member whose lower end portion is held by the holding member is provided at an upper end portion of the support member, and the armrest is tilted in the front-rear direction and supported. And a possible tilt support mechanism, whereby the tilt of the armrest in the front-rear direction can be adjusted by the tilt support mechanism.

  In the armrest device according to the present invention, the armrest is configured to be tiltable via the tilting support mechanism until the armrest becomes upright with respect to the support member, so that the height of the armrest can be adjusted, and the armrest can be adjusted relative to the support member. It can be performed while standing up. Therefore, by raising the armrest, it becomes easy to visually recognize the fixing tool, so that the fixing tool can be easily operated manually, and the height adjustment of the armrest can be performed more easily.

In the above armrest device according to the present invention, the engaging portion that engages with each other in a state where the fixing tool is attached to the unit holding member and regulates the displacement of the fixing tool with respect to the unit holding member is provided on the support member and the fixing tool. By being provided respectively, in a state where the armrest unit is fixed to the unit holding member by the fixing device, a displacement of the fixing device with respect to the unit holding member due to vibrations during work and the like, the fixing force by the fixing device is reduced. It is possible to prevent the drop.

It is a perspective view of the hydraulic shovel provided with the armrest device concerning the present invention. It is the side view which looked at the above-mentioned hydraulic shovel from the vehicle left side. It is a rear view of the above-mentioned hydraulic shovel. It is a perspective view in the operator cabin of the above-mentioned hydraulic shovel. It is a block diagram showing composition of a hydraulic drive of the above-mentioned hydraulic shovel. It is an exploded perspective view showing the whole armrest device composition. It is a side view of the above-mentioned armrest device. It is a rear view of the armrest device. It is a side view showing the composition of the tilting support mechanism of the above-mentioned armrest device. FIG. 3 is a plan view of a tilt plate of the tilt support mechanism. It is a side view of the said tilting plate. It is a side view when the armrest unit of the armrest device is in a flipped-up state. FIG. 5 is a rear view when the armrest unit is in a flipped-up state. It is a perspective view showing composition of a clamp of the above-mentioned armrest device. It is a top view showing the composition of the above-mentioned clamp. It is a side view which shows the moving state of the said armrest unit in the up-down direction. It is a top view which shows the rotation state of the said armrest unit in the left-right direction. It is a perspective view which shows the state which attached the screw for retaining to the support | pillar member of the said armrest unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, an armrest device used in a crawler type excavator (excavator) will be described as an example of an armrest device according to the present invention. First, the overall configuration of the excavator 1 will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the excavator 1 includes a traveling body 10 configured to be able to travel, a revolving body 20 provided on the traveling body 10 so as to be capable of horizontal revolving, and a front part of the revolving body 20. And the shovel device 30 provided in the first embodiment.

  The traveling body 10 is provided with a pair of right and left crawler mechanisms 15 having driving wheels, a plurality of driven wheels, and a crawler belt 14 looped around these wheels, respectively, on both left and right sides of the traveling body frame 11. The left and right crawler mechanisms 15 have left and right traveling motors 16 for driving and driving the drive wheels. The traveling body 10 is configured to be able to travel in any direction and at any speed by controlling the rotation direction and the rotation speed of the left and right traveling motors 16 respectively. A blade 18 is provided at the front part of the traveling body frame 11 so as to be vertically swingable. The blade 18 is configured to be able to swing up and down by extending and retracting a blade cylinder 19 provided between the blade 18 and the traveling body frame 11.

  A turning mechanism 5 is provided at the upper center of the traveling body frame 11. The turning mechanism 5 is provided on an inner ring fixed to the traveling frame 11, an outer ring fixed on the revolving body 20, a turning motor 8 (see FIG. 5) provided on the revolving body 20, and provided on the revolving body 20. A rotary center joint for supplying hydraulic oil to the left and right traveling motors 16 and the blade cylinder 19 provided on the traveling body 10 from the hydraulic pump 64 (see FIG. 5). The revolving unit 20 is horizontally rotatably provided on the traveling body frame 11 via the revolving mechanism 5, and is configured to be capable of revolving in the left-right direction with respect to the traveling unit 10 by rotating the revolving motor 8 forward or reverse. ing.

  The revolving superstructure 20 has a revolving superstructure frame 21 provided on the traveling frame 11 so as to be horizontally rotatable via the revolving mechanism 5, and an operator cabin 25 provided on the revolving superstructure frame 21. At the front of the revolving unit frame 21, a revolving unit side bracket 22 protruding forward is provided.

  The shovel device 30 is vertically swingable by a revolving bracket 31 provided on the revolving-body bracket 22 so as to be swingable in the left-right direction about the vertical axis, and a first pivot pin P1 on the upper end of the shovel bracket 31. A boom 32 provided on the distal end of the boom 32, an arm 33 provided on the distal end of the boom 32 so as to be vertically swingable (flexible and extendable) by a second pivot pin P2, and a second end on the distal end of the arm 33. And a bucket 34 provided to be able to swing up and down by a three pivot pin P3. Further, the shovel device 30 includes a swing cylinder 35 (see FIG. 5) laid between the revolving frame 21 and the shovel-side bracket 31, and a boom cylinder laid between the shovel-side bracket 31 and the boom 32. 36, an arm cylinder 37 laid between the boom 32 and the arm 33, a bucket cylinder 38 laid between the arm 33 and the bucket 34, and between the rod tip of the bucket cylinder 38 and the bucket 34. And a link mechanism 39 provided.

  The shovel-side bracket 31 is configured to be swingable in the left-right direction with respect to the revolving-body-side bracket 22 (the revolving-body frame 21) by extending and retracting the swing cylinder 35. The boom 32 is configured to be capable of swinging up and down (movable up and down) with respect to the shovel-side bracket 31 by expanding and contracting a boom cylinder 36. The arm 33 is configured to be vertically swingable (bendable and extendable) with respect to the boom 32 by expanding and contracting the arm cylinder 37. The bucket 34 is configured to be vertically swingable with respect to the arm 33 via a link mechanism 39 by expanding and contracting a bucket cylinder 38.

  Instead of the bucket 34, various attachments such as a breaker, a crusher, a cutter, and an auger device can be attached to the distal ends of the arm 33 and the link mechanism 39 so as to be vertically swingable. When these attachments are mounted, a plurality of connection ports PT capable of connecting hydraulic hoses for supplying hydraulic oil to hydraulic actuators constituting the attachments are provided on both left and right side surfaces of the arm 33.

  The operator cabin 25 is formed in a substantially rectangular box shape, forms an operation room in which an operator can board, and has a cabin door 26 that can be opened and closed horizontally on the left side. As shown in FIG. 4, inside the operator cabin 25, an operator seat 40 on which a worker can face forward and sit down, left and right traveling operation levers 41 and 42 for performing traveling operation of the traveling body 10, and turning. Left and right work operation levers 43 and 44 for performing a turning operation of the body 20 and an operation operation of the shovel device 30, a swing operation pedal 45 for performing a swing operation (a swing operation to the left and right) of the shovel device 30, and an operation of the blade 18. A blade operation lever 46 (see FIG. 5) for performing operations, a display device for displaying various types of vehicle information in the excavator 1, and various operation switches 47 operated by an operator are provided. A pedal portion is provided at the lower end of each of the travel operation levers 41 and 42, and the operator can also perform the travel operation of the travel body 10 with his / her feet.

The revolving superstructure 20 is provided with mounting chambers for mounting a hydraulic drive device 60 (see FIG. 5) at rear and right positions of the operator cabin 25. A rear wall portion that forms the mounting chamber is provided with a curved counterweight 27 and an engine cover 28 that can be opened and closed vertically. As shown in FIG. 5, the hydraulic drive device 60 includes an engine 61, a hydraulic oil tank 63 that stores hydraulic oil, a hydraulic pump 64 and a pilot pump 65 driven by the engine 61, and a hydraulic pump 64 that is discharged from the hydraulic pump 64. The control valve unit 66 controls a supply direction and a supply amount of hydraulic oil supplied to each hydraulic actuator, and a pilot valve unit 67 that generates a pilot pressure for driving the control valve unit 66.

  The control valve unit 66 includes control valves CV1 to CV9 corresponding to the left and right traveling motors 16, blade cylinders 19, swing motors 8, swing cylinders 35, boom cylinders 36, arm cylinders 37, bucket cylinders 38, and connection ports PT. Have. The built-in spools of these control valves CV1 to CV9 are moved by the pilot pressure supplied from the pilot valve unit 67, and the movement of the spool controls the supply direction and supply amount of the hydraulic oil supplied to each hydraulic actuator. It is supposed to.

  The pilot valve unit 67 includes a left traveling pilot valve unit PV1 disposed at the root of the left traveling operation lever 41, a right traveling pilot valve unit PV2 disposed at the root of the right traveling operation lever 42, and a left work. A left working pilot valve unit PV3 disposed at the root of the operating lever 43, a right working pilot valve unit PV4 disposed at the root of the right operating lever 44, and a root of the swing operation pedal 45. A swing pilot valve unit PV5 and a blade pilot valve unit PV6 disposed at the root of the blade operating lever 46. Each of these pilot valve units PV1 to PV6 is provided with a plurality of pilot valves, and based on pressure oil supplied from a pilot pump 65, the pilot valve units PV1 to PV6 correspond to tilt operation directions and operation amounts of respective operation levers and the like. A pressure is generated and supplied to a corresponding control valve.

  In the hydraulic excavator 1 configured as described above, when the left and right traveling operation levers 41 and 42 disposed in front of the operator seat 40 in the operator cabin 25 are tilted back and forth, the operation is performed according to the operation direction and the operation amount. The pilot pressure is generated by the left and right traveling pilot valve units PV1 and PV2. Then, the control valves CV1 and CV2 corresponding to the left and right traveling motors 16 are driven by the pilot pressure, and hydraulic oil is supplied to the left and right traveling motors 16. In this manner, the hydraulic excavator 1 can travel by operating the left and right crawler mechanisms 15 in the traveling direction and the traveling speed according to the operation direction and the operation amount of the left and right traveling operation levers 41 and 42. ing.

  When the left and right work operation levers 43 and 44 disposed on the left and right sides of the operator seat 40 are tilted back and forth and left and right, a pilot pressure is generated by the left and right work pilot valve units PV3 and PV4 according to the operation direction and the operation amount. Is done. The pilot pressure drives the swing motor 8, the boom cylinder 36, the arm cylinder 37, the bucket cylinder 38, and the control valves CV4, CV6 to CV9 corresponding to the connection port PT, and the operation direction of the left and right work operation levers 43, 44. The hydraulic oil is supplied to the hydraulic actuator corresponding to. When the swing operation pedal 45 is depressed left and right, a pilot pressure is generated by the swing pilot valve unit PV5 in accordance with the operation direction and the operation amount, and the pilot pressure drives the control valve CV5 to apply hydraulic oil to the swing cylinder 35. Is supplied. When the blade operation lever 46 is tilted back and forth, a pilot pressure is applied by the blade pilot valve unit PV6 in accordance with the operation direction and the operation amount, and the control valve CV3 is driven by the pilot pressure so that the operating oil is supplied to the blade cylinder 19. Supplied. In this manner, the revolving unit 20, the shovel device 30, and the blade 18 are operated in the operating direction and operating speed according to the operating direction and amount of the left and right work operation levers 43, 44, the swing operation pedal 45, and the blade operation lever 46. It is configured so that excavation work or the like can be performed.

  As shown in FIG. 4, on the left and right sides of the operator seat 40, armrest devices 100 used by an operator sitting on the operator seat 40 to place his elbow are arranged. Hereinafter, the detailed configuration of the armrest device 100 will be described with reference to FIGS. 6 to 18 additionally. As shown in FIGS. 6 to 8, the armrest device 100 includes an armrest unit 110, a clamp 130, and a holding tube 150.

  The armrest unit 110 includes an armrest 111 formed in a saddle shape on which an operator places an elbow, a cylindrical support member 115 extending in the vertical direction, and a tilt support mechanism 120 provided at an upper end of the support member 115. And is configured. The tilt support mechanism 120 adjusts the tilt of the armrest 111 in the front-rear direction. The tilt support mechanism 120 is provided so as to face the base plate 121 fixed to the upper end of the support member 115 and to the left and right at the front end of the base plate 121. Vertical plate 122 (see FIG. 13 for the left vertical plate 122), a tilt plate 125 pivotally connected to the vertical plate 122 via a pivot bolt 123, and a tilt adjustment member for adjusting the tilt of the tilt plate 125. 126.

  As shown in FIG. 10, the tilting plate 125 has an opening 125a at the center for reducing weight, and screw mounting holes 125b are provided at four corners around the opening. The armrest 111 is attached to the lower surface of the armrest 111 by an attachment screw 127 (see FIG. 6) inserted into each screw attachment hole 125b. As shown in FIG. 11, a bearing 125d having a pivot hole 125c penetrating in the left-right direction is formed at the front end of the tilting plate 125. As shown in FIG. 13, the tilting plate 125 has a pivot hole (not shown) formed in the left and right vertical plates 122 with the bearing 125 d disposed between the left and right vertical plates 122 on the base plate 121. The shaft portion of the pivot bolt 123 is inserted into the pivot hole 125c (see FIG. 11) of the bearing portion 125d so that the base plate 121 and the support member 115 can be moved forward and backward through the left and right vertical plates 122. It is supported to be tiltable. As shown in FIG. 13, a pivot nut 124 is screwed to the tip of the pivot bolt 123. The pivot nut 124 is tightened toward the vertical plate 122 with a predetermined strength. Due to the tightening, when the tilting plate 125 tilts with respect to the base plate 121, a frictional resistance force against the tilting is generated between the heads of the pivot nut 124 and the pivot bolt 123 and the left and right vertical plates 122. To work.

  As shown in FIG. 9, the tilt adjustment member 126 extends vertically and has a lower end fixed to a screw hole (not shown) formed in the base plate 121 and an upper end of the adjustment pin 126 a. And a support nut 126c attached to the adjusting pin 126a. The adjusting pin 126a has a screw portion (not shown) for screwing with a screw hole of the base plate 121 formed on an outer peripheral surface. By rotating the adjusting pin 126a around an axis, the length of a portion projecting upward from the base plate 121 changes. Thereby, the height of the support 126b from the base plate 121 can be adjusted. The support 126b is formed of a rubber material or a synthetic resin material, and is configured to contact and support the tilt plate 125 from the lower surface side. The tightening nut 126c is rotated around the adjusting pin 126a by using a tightening and loosening tool (not shown), and the adjusting pin 126a can be fixed to the base plate 121 by tightening or loosened to release the fixing. Is configured.

As shown in FIG. 6, the holding tube 150 is a cylindrical member having a slightly larger diameter than the support member 115 of the armrest unit 110, and is fixed to a member on the operator cabin 25 side via the holding bracket 70. The holding tube 150 is configured to hold the armrest unit 110 movably in the up-down direction and rotatable in the left-right direction by inserting the support member 115 of the armrest unit 110 therein. A first slit 151 and a second slit 152 are formed at the upper end of the holding tube 150 and extend in the up-down direction and open at the upper end. Further, a third slit 153 (see FIG. 14) extending in the up-down direction and having both upper and lower ends closed is formed at a position opposite to the first slit 151. The first slit 151 is for allowing the upper end of the holding tube 150 to be elastically deformed in the radial direction, and the second slit 152 is for preventing the mounting position of the clamp 130 with respect to the holding tube 150 from shifting. belongs to. The third slit 153 is provided so as to be used when it is desired to prevent the armrest unit 110 (support member 115) held by the holding tube 150 from coming off upward.

  As shown in FIG. 14, the clamp 130 has an annular clamp band 131 divided at one position in the circumferential direction, and the clamp band 131 integrated with the clamp band 131 so as to face each other with the divided portion of the clamp band 131 interposed therebetween. A pair of bolt support pieces 132A, 132B formed in the above, a clamp bolt 133 in which a shaft portion is inserted through a through hole (not shown) formed in the bolt support pieces 132A, 132B, and an attachment to the tip of the clamp bolt 133 And a clamp lever 135 whose base end is pivotally connected to the distal end of the clamp bolt 133 via the clamp pin 134 so as to be swingable in the left-right direction. You.

  The clamp 130 is used by being attached to the upper end of the holding tube 150 as shown in FIG. On the inner peripheral surface of the clamp band 131, an engaging protrusion 131a extending vertically (the vertical length of the engaging protrusion 131a is substantially equal to the vertical length of the second slit 152) is formed. In the clamp 130, the engaging projection 131 a engages with the second slit 152 of the holding tube 150, and the pair of bolt support pieces 132 A, 132 B are located on both sides of the first slit 151 of the holding tube 150. Then, it is attached to the upper end of the holding tube 150. Hereinafter, the attachment position of the clamp 130 attached to the upper end of the holding tube 150 in such a state is referred to as “regular attachment position”. The engaging projection 131a of the clamp band 131 engages with the second slit 152 of the holding tube 150 when the clamp 130 is attached to the upper end of the holding tube 150 at the regular attachment position, and Thus, the clamp 130 can be prevented from shifting in the circumferential direction and the downward direction. Therefore, it is possible to accurately perform the tightening by the clamp 130 at the regular mounting position at the upper end of the holding tube 150.

  When the operator directly operates the clamp lever 135 by hand, the position where the tip of the clamp lever 135 abuts on the clamp band 131 (hereinafter referred to as “lock position”) and the position of the clamp lever 135 from the lock position to around the clamp pin 134 are determined. It is configured to be able to swing between a position that swings by a predetermined angle or more (hereinafter, referred to as a “lock release position”). The outer peripheral surface of the base end of the clamp lever 135 serves as a cam surface 135a that slides on the outer surface 132a (configured with a curved surface; see FIG. 15) of the bolt support piece 132A when the clamp lever 135 is swung. It is configured. When the clamp lever 135 is operated to the lock position, the cam surface 135a of the clamp lever 135 presses the bolt support piece 132A toward the bolt support piece 132B while slidingly contacting the outer surface 132a of the bolt support piece 132A. As a result, the clamp band 131 is bent inward and tightens the holding tube 150 so that the diameter of the holding tube 150 is reduced. On the other hand, when the clamp lever 135 is operated to the unlock position, the pressing of the bolt supporting piece 132A by the cam surface 135a is released, whereby the deformation of the clamp band 131 returns to its original state, and the tightening of the holding tube 150 is released.

The armrest unit 110 is configured such that the lower end of the support member 115 is inserted into the holding tube 150 in a state where the clamp 130 is attached to the upper end of the holding tube 150 (the clamp lever 135 is in the unlocked position). The holding tube 150 is held movably in the up-down direction and rotatable in the left-right direction. When the armrest unit 110 is held by the holding tube 150, the clamp 130 tightens the holding tube 150 by manually operating the clamp lever 135 of the clamp 130 to the lock position. The holding tube 150 is elastically deformed by the tightening by the clamp 130, and the inner peripheral surface of the holding tube 150 is pressed against the outer peripheral surface of the support member 115, thereby fixing the armrest unit 110 to the holding tube 150. . That is, the movement of the armrest unit 110 in the vertical direction and the rotation in the horizontal direction with respect to the holding tube 150 are restricted.

  When adjusting the height of the armrest 111, first, the clamp lever 135 of the clamp 130 is moved to the unlocked position by manual operation to release the fixation of the armrest unit 110 to the holding tube 150. Next, the armrest unit 110 is moved in the vertical direction while being held by hand, and is held at a position where the armrest 111 has a desired height. Then, the clamp lever 135 is moved to the lock position by manual operation, and the armrest unit 110 is fixed to the holding tube 150. By such a procedure, the height of the armrest 111 can be easily adjusted (see FIG. 16).

  When adjusting the horizontal direction of the armrest 111, first, the clamp lever 135 of the clamp 130 is moved to the unlock position by manual operation, and the fixing of the armrest unit 110 to the holding tube 150 is released. Next, the armrest unit 110 is held in a position where the armrest 111 is oriented in a desired direction by rotating the armrest unit 110 in the left and right direction by hand. Then, the armrest unit 110 is fixed to the holding tube 150 by manually setting the clamp lever 135 to the lock position. By such a procedure, the left-right direction of the armrest 111 can be easily adjusted (see FIG. 17).

  The tilt of the armrest 111 in the front-rear direction is adjusted using the tilt adjusting member 126 of the tilt support mechanism 120 (see FIG. 9). Specifically, first, the tightening nut 126c of the tilt adjustment member 126 is rotated using a tightening and loosening tool to release the tightening of the adjustment pin 126a on the base plate 121. Next, the support 126b is rotated by a manual operation together with the adjustment pins 126a to change the height of the support 126b from the base plate 121. By changing the height of the support 126b, the tilt plate 125 supported by the support 126b tilts around the pivot bolt 123, whereby the tilt of the tilt plate 125 in the front-rear direction changes. When the tilt of the tilt plate 125 in the front-back direction changes, the tilt of the armrest 111 attached to the tilt plate 125 in the front-back direction also changes. Therefore, the height of the support 126b from the base plate 121 is adjusted so that the inclination of the armrest 111 becomes a desired inclination. After the adjustment, the tightening nut 126c is rotated around the adjustment pin 126a using a tightening and loosening tool, By tightening and fixing the adjustment pin 126a to the base plate 121, the inclination of the armrest 111 in the front-back direction can be adjusted within a predetermined range.

  The armrest 111 is tilted in the front-rear direction via the tilting support mechanism 120 until the armrest 111 is in a state of standing upright with respect to the support member 115 (holding tube 150, hereinafter referred to as a “flip-up state”). It has become possible. When tilting the armrest 111 to the flipped state, the tilt adjustment member 126 is not used. For example, by holding the rear end of the armrest 111 by hand and tilting the armrest 111 so as to jump up, that is, by tilting the tilting plate 125 of the tilting support mechanism 120 so as to tilt greatly with respect to the base plate 121, The armrest 111 is configured to be able to be tilted up to the flip-up state.

When the armrest 111 is tilted to the flip-up state, the tilt plate 125 is separated from the support 126b of the tilt adjusting member 126 and is not supported by the tilt adjusting member 126 (see FIG. 13). In the present embodiment, as described above, by tightening the pivot nut 124 in the tilt support mechanism 120, the frictional resistance acts between the heads of the pivot nut 124 and the pivot bolt 123 and the left and right vertical plates 122. It is supposed to. Then, even when the armrest 111 is tilted to a state where it is not supported by the tilt adjustment member 126, the tilting state of the armrest 111 is maintained by the frictional resistance. Therefore, even if the armrest 111 is tilted to the flipped state and then released, the armrest 111 is held in the flipped state. The frictional resistance is reduced by disposing a disc spring, a resin washer, a washer, etc. between the pivot nut 124 and the vertical plate 122 or between the head of the pivot bolt 123 and the vertical plate 122. It may be obtained. Further, the tilting plate 125 may be pivotally attached to the base plate 121 via a torque hinge so that the tilting state of the armrest 111 can be maintained.

  By setting the armrest 111 in a flipped-up state, it becomes easy for an operator to visually recognize the tilt adjustment member 126 and the clamp 130. Therefore, there is an advantage that the tilt adjustment member 126 and the clamp 130 can be easily operated. When placing the elbow on the armrest 111, the armrest 111 is tilted so that the tilting plate 125 is in a state of being supported by being supported by the support 126b of the tilt adjusting member 126 (hereinafter, referred to as a “tilting support state”). When the armrest 111 in the flipped-up state is set to the tilting support state, for example, the rear end of the armrest 111 is held by hand, and the armrest 111 is tilted so as to fall down until the tilting plate 125 comes into contact with the support 126b. Let it. Since the support 126b is formed of a rubber material or a synthetic resin material, when the tilt plate 125 abuts on the support 126b, the tilt plate 125 may be damaged or unpleasant noise may be generated. Can be prevented.

  According to the armrest device 100 configured as described above, the height, the left-right direction, and the front-back tilt of the armrest 111 can be adjusted. Therefore, the posture of the armrest 111 can be variously changed according to the physique and preference of the worker. In particular, the adjustment of the height of the armrest 111 and the adjustment of the direction in the left-right direction can be performed very easily because there is no need to use a tool. When the clamp 130 is attached to the upper end of the holding tube 150 at the regular mounting position, the engaging protrusion 131a of the clamp band 131 and the second slit 152 of the holding tube 150 engage with each other, and Thus, the clamp 130 can be prevented from shifting in the circumferential direction or the downward direction. Therefore, while the armrest device 100 is in use, the mounting position of the clamp 130 with respect to the holding tube 150 shifts in the circumferential direction or the downward direction, whereby the fixing force of the armrest unit 110 (post member 115) by the clamp 130 decreases. Thus, it is possible to prevent a situation in which the height of the armrest 111 and the direction in the left-right direction suddenly change.

  When it is desired to prevent the armrest unit 110 from falling out of the holding tube 150, for example, when adjusting the height of the armrest 111, as shown in FIG. 18, the holding tube 150 is attached to the lower end of the support member 115 of the armrest unit 110. A screw 117 having a head having a size (diameter) that fits within the third slit 153 may be attached. The screw 117 is attached to a lower end portion (a portion facing the third slit 153) of the support member 115 in a state where the support member 115 is inserted into the holding tube 150. When the support member 115 is lifted above the holding tube 150 by a predetermined amount or more, the attached screw 117 causes the head of the screw 117 to abut on the upper end of the third slit 153, whereby the support member 115 is 150 can be prevented from falling out. When the diameter of the head of the screw 117 and the width of the third slit 153 are set to be substantially the same, it is possible to prevent the support member 115 from rotating with respect to the holding tube 150. When the width of the third slit 153 is set to be relatively larger than the diameter of the head of the screw 117, the angle range in which the support member 115 can rotate with respect to the holding tube 150 is limited to a predetermined range. It is possible to do.

The embodiments of the present invention have been described above, but the scope of the present invention is not limited to the above-described embodiments. For example, in the above-described embodiment, the armrest is configured to be flipped forward, but may be configured to be flipped rearward. Further, in the above-described embodiment, the case where the present invention is applied to the armrest device of the excavator 1 has been described. However, the present invention is similarly applied to the armrest device of another working vehicle other than the excavator 1. The same effect can be obtained.

REFERENCE SIGNS LIST 1 hydraulic excavator 10 traveling body 20 revolving structure 25 operator cabin 30 excavator device 60 hydraulic drive device 70 holding bracket 100 armrest device 110 armrest unit 111 armrest 115 support member 120 tilt support mechanism 121 base plate 125 tilt plate 130 clamp fixture 131 clamp band 135 clamp Lever 150 Holding tube 151 First slit 152 Second slit 153 Third slit

Claims (5)

An armrest device used by an operator sitting on a seat in an operation room of a work vehicle to place an elbow,
An armrest unit having an armrest;
A unit holding member installed in the operation room and capable of holding the armrest unit movably up and down.
A fixture that is attached to the unit holding member, is manually operated, and is operable to fix and release the armrest unit to the unit holding member,
Release the fixation of the armrest unit to the unit holding member by the fixture, move the armrest unit vertically with respect to the unit holding member, and hold the armrest unit by the fixture at the position after the movement. An armrest device for a working vehicle, wherein the armrest device is configured to be fixed to a member. The unit holding member is capable of holding the armrest unit rotatably in the left-right direction,
Release the fixation of the armrest unit to the unit holding member by the fixing tool, rotate the armrest unit in the left-right direction with respect to the unit holding member, and move the armrest unit by the fixing tool at a position after the rotation. The armrest device for a working vehicle according to claim 1, wherein the armrest device is configured to be fixed to the unit holding member. The armrest unit,
A column member extending in the up-down direction and having a lower end portion held by the holding member,
3. The work vehicle according to claim 1, further comprising: a tilt support mechanism that is provided at an upper end of the support member and that can tilt and support the armrest in a front-rear direction. 4. Armrest device.   4. The armrest device for a working vehicle according to claim 3, wherein the armrest is configured to be tiltable via the tilting support mechanism until the armrest is in an upright state with respect to the support member. 5. Engaging portions that engage with each other in a state where the fixing tool is attached to the unit holding member and regulate a displacement of the fixing tool with respect to the unit holding member are provided on the column support member and the fixing tool, respectively. The armrest device for a working vehicle according to any one of claims 1 to 4, wherein

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