JP4286183B2 - Armrest device - Google Patents

Description

  The present invention relates to an armrest device provided in a driver's seat such as a tractor.

In recent years, in a driver's seat such as a tractor, in order to reduce the size and improve the operability of the operating device provided in the cabin, a part of the operating device is attached to the armrest provided in the driver's seat side part. What has been deployed as has been developed.
In this type of armrest, a front / rear position adjustment mechanism for adjusting the front / rear position of the armrest relative to the driver's seat is provided so that the position of the armrest can be adjusted according to the body shape of the operator. Can adjust the front / rear position of the armrest in accordance with its own body shape, and can set the operation part provided at the tip of the armrest to the position where it can be most easily operated (see Patent Document 1 or Patent Document 2). ).

In addition, there has been proposed a driver's seat for a work vehicle that includes an armrest that enables position adjustment in the vertical direction as well as position adjustment in the front-rear direction with respect to the driver seat. In the driver's seat, an armrest member (armrest) is composed of a flat mounting portion and a cushion provided at the upper end of the mounting portion, and the mounting portion is connected to the vertical groove and the long groove. A plurality of horizontal relief grooves are formed, and the armrest member is fixed to the side of the driver's seat by screwing a screw inserted through the relief groove into a bracket on the side of the driver's seat (Patent Document) 3).
According to the above configuration, first, by loosening the fixed screw and moving the armrest member horizontally, the screw is relatively moved from the horizontal escape groove toward the long groove, and then the armrest is moved along the long groove. By raising and lowering the member, the armrest member is moved to a desired vertical position.

Thereafter, the armrest member is further moved relative to the horizontal clearance groove formed at the vertical position, and the screw is screwed again at a desired front-rear position. As a result, the armrest member is adjusted to the desired vertical position and front-rear position.
JP 09-025643 A JP-A-10-131235 JP 09-0003287 A

However, in order to adjust the position of the armrest member in the driver's seat of the work vehicle of Patent Document 3, first, the armrest member is set from the position setting state to the position adjustable state by loosening the screw, and then, The armrest member must be moved to the desired vertical and front / rear positions and then screwed together to fix the armrest member in the position setting state again. It was complicated.
In view of the above problems, an object of the present invention is to provide an armrest device that can easily set an armrest to a position setting state or a position adjustable state.

Specific means for solving the problems in the present invention are as follows.
First, the armrest 41 having the operation unit 43 and disposed on the side of the driver's seat 31 and having the arm main body 42, and adjusting the position of the armrest 41 in the front-rear direction and the vertical direction with respect to the driver's seat 31. A position adjustment mechanism 51 that supports the position of the armrest 41. The position adjustment mechanism 51 includes a switching operation member 72 that switches the armrest 41 between a position setting state and a position adjustable state.
The position adjusting mechanism 51 includes a support base 52 attached to the side of the driver's seat 31, a connecting member 53 connected to the arm body 42 and having a pair of left and right flat plate portions 57 a and 57 b, Parallel link means 54 for connecting the support base 52, and angle setting means 71 for setting the swing angle of the pair of front and rear link bodies 59, 60 of the parallel link means 54;
The switching operation member 72 is provided so as to penetrate one link body 60 of the parallel link means 54, and the angle setting means 71 is formed on the left and right flat plate portions 57a and 57b of the connecting member 53, and Each of the guide grooves 74 includes a guide groove 74 and a slide groove 75 for guiding the movement of the switching operation member 72. The guide groove 74 engages with the switching operation member 72 and swings the link body 60 on one of the front and rear sides. A plurality of engaging portions 74b for setting
The switching operation member 72 is provided with an operation lever 72a for swinging the guide groove 74 side with respect to the sliding groove 75 side to engage and disengage with the engaging portion 74b.

Second, the cross-sectional shape of the switching operation member 72 and the switching operation member insertion hole 77 of the one link body 60 are formed in an oval shape, and the switching operation member 72 is engaged with the guide groove 74 by a spring 78. It is biased to be engaged with the portion 74b.
The present invention having the above features has the following effects.
First, the armrest 41 provided on the side of the driver's seat 31 with the operation unit 43, and the position adjustment that supports the armrest 41 with respect to the driver's seat 31 so that the position adjustment in the front-rear direction and the vertical direction is possible. The position adjusting mechanism 51 is provided with a switching operation member 72 for switching the armrest 41 between a position setting state and a position adjustable state, whereby the switching operation member 72 of the position adjustment mechanism 51 is provided. By performing the operation, the position setting state and the position adjustable state of the armrest 41 can be freely switched, whereby the position adjustment of the armrest 41 can be easily performed.

Second, the position adjusting mechanism 51 is adjustable in position over the forward and upward from the lower rear of the armrest 41, by the longitudinal movement distance is set to be larger than the vertical distance traveled, driver's seat Therefore, the movement space for adjusting the position of the armrest 41 relative to the position 31 is minimized, and it is not necessary to provide a large movable space for the armrest 41 around the driver's seat 31. The deployment space and the interior space of the cabin in which the driver's seat 31 and the operation unit are deployed can be reduced in size.
Thirdly, the position adjusting mechanism 51 includes a support base 52 attached to the side of the driver's seat 31, parallel link means 54 connecting the support base 52 and the armrest 41, and a pair of links of the parallel link means 54. by and an angle setting means 71 for setting the swing angle of the body 59, the armrest 41 is moved parallel to to the driver's seat 31 by the support base 52 parallel link means 54 which is pivotally supported on Therefore, even when the armrest 41 is set from the position setting state to the position adjustable state by operating the switching operation member 72, the mounting posture of the armrest 41 with respect to the driver's seat 31 is kept constant. Is not unstable, and the armrest 41 is fixed to a predetermined upper position by setting the pair of link members 59, 60 of the parallel link means 54 to a predetermined swing angle. Than it is easily set the position and longitudinal position.

Fourth, the switching operation member 72 is provided through one link body 60 of the parallel link means 54, and the angle setting means 71 is provided on either the support base 52 or the armrest 41. A guide groove 74 that is formed and guides the movement of the switching operation member 72 is provided. The guide groove 74 is engaged with the switching operation member 72 to set the swing angle of the one link body 60. by engaging portion 74b of is formed with a plurality, by engaging the sections operating member 72 to move the switch means 72 to either the engaging portion 74b of the guide groove 74, the parallel link means The pair of link bodies 59, 60 are held at a swing angle corresponding to the engaging portion 74b, so that the armrest 41 is positioned at the front and rear positions and the vertical position of the engaging portion 74b. Than it is set in.

  Further, by disengaging the switching operation member 72 from the engaging portion 74b in the guide groove 74, the pair of link bodies 59, 60 of the parallel link means are set in a swingable state, whereby the armrest 41 is The position adjustment is enabled so that the position can be adjusted.

  According to the present invention, the armrest can be easily switched to the position setting state or the position adjustable state by operating the switching operation member.

Below, the form which implemented this invention to the tractor is described with reference to FIGS.
In FIG. 7, 1 is a tractor with a cabin. The tractor 1 includes a pair of left and right front wheels 2 and a rear wheel 3. The front wheel 2 is a steered wheel and can be driven. Although it is a drive tractor, the front wheel 2 can be switched to a two-wheel drive (rear wheel drive) by connecting / disconnecting power to this.
The vehicle body 4 of the tractor 1 is configured by connecting a transmission case 6 to a rear portion of the mounted engine 5 via a track housing, and an engine 5 and an auxiliary machine for the engine 5 are provided at the front upper portion of the vehicle body 4. And a pair of left and right rear wheel fenders 8a covering the upper part of the pair of left and right rear wheels 3, and a cabin 8 on the upper part of the pair of left and right rear wheel fenders 8a. Has been deployed.

The rear side of the bonnet 7 is pivotally supported so as to be swingable in the vertical direction. By opening the bonnet 7, it is possible to inspect and maintain the engine 5 and the auxiliary equipment of the engine 5. It has become. In addition, the bonnet 7 may be one in which the top plate portion is set so as to be freely opened and closed.
A front loader (work machine) 10 is detachably attached to the front portion of the vehicle body 4, and the front loader 10 is detachably fixed to a pair of brackets 9 provided on both the left and right sides of the bonnet 7. A pair of left and right masts 11, a pair of left and right booms 12 supported at the tip portions of both masts 11 so as to be swingable up and down, and a bucket 13 supported at the tip portions of both booms 12 so as to be able to perform a squeeze dumping operation. ing.

Each boom 12 is swung by the expansion and contraction of the boom cylinder 14 interposed between the boom 12 and the mast 11, and the bucket 13 is connected to the bucket cylinder 15 interposed between the bucket 13 and the boom 12. Squeeze dumping operation by expansion and contraction. These boom cylinder 14 and bucket cylinder 15 are constituted by hydraulic cylinders (hydraulic equipment).
At the upper rear surface of the vehicle body 4, and is equipped with a hydraulic lifting device 20 having a pair of right and left lift arms 21, the said hydraulic lifting device 20, working device such as a rotary working device via a three-point link 22 (Not shown) is detachably mounted so that it can be controlled up and down.

Between the pair of left and right rear wheel fenders 8a, a driving operation seat 28 is provided, and an operation device 29 having a steering handle is provided in front of the driving operation seat 28, the operation device 29, A driving control device 30 is configured inside the cabin 8 by the driving operation seat 28 and an operation box (not shown) provided on the right side of the driving operation seat 28.
The driver's operation seat 28 includes a swivel seat (driver's seat) 31 pivotally supported around a longitudinal axis and an armrest device 40 disposed on the right side of the swivel seat 31. By swinging 31, the operator can easily move up and down into the cabin 8, and can easily make a rearward confirmation visually while seated on the swivel seat 31.

As shown in FIG. 2, the armrest device 40 includes an armrest 41 for placing the operator's elbow, and a position adjustment mechanism 51 that enables the position adjustment of the armrest 41 with respect to the swivel seat 31 in the front-back direction and the vertical direction. The armrest 41 is supported by the seat portion 31 a of the swivel seat 31 via the position adjustment mechanism 51.
As shown in FIGS. 1 and 2, the armrest 41 includes an arm main body 42 formed in a rectangular parallelepiped shape, and an operation portion 43 for performing various vehicle body controls is arranged at the distal end portion of the arm main body 42. Yes. Further, the upper surface of the arm main body 42 is covered with a cushioning material 42a, so that even when the operator performs a long work with the elbow placed on the arm main body 42, the fatigue of the operator is reduced. It is alleviated .

On the upper surface of the operation unit 43, a position lever 43a for operating the hydraulic lifting device 20 to set the working machine to a predetermined height position is provided slidably in the front-rear direction of the operation unit 43. A lower limit regulating drum 43b for regulating the sliding of the position lever 43a and holding the lower limit position of the work implement is provided so as to be rotatable around the pivot axis.
Further, as shown in FIG. 3, on the side surface of the operation unit 43 on the swivel seat 31 side, a shift shift operation unit 43c including a shift up button and a shift down button for performing a shift operation during traveling of the tractor 1, A pumper switch 43d for moving the work machine up and down between a predetermined upper limit position and a lower limit position is provided.

The shift shift operation unit 43c shifts the speed of the tractor 1 from 8 to 16 stages, but it may of course be shifted to other stages.
As shown in FIG. 2, the position adjusting mechanism 51 includes a support base 52 supported by the swivel seat 31, a connecting member 53 connected to the arm main body 42 , and a parallel link that connects the connecting member 53 to the support base 52. Means 54.
As shown in FIGS. 1, 4 and 5, the support base 52 is formed by pressing a metal plate or a metal plate, and a horizontal piece 55 a extending along the bottom surface of the seat portion 31 a of the swivel sheet 31. And an angle-shaped support portion 55 composed of an upright piece 55b extending along the right side surface of the seat portion 31a, and from the rear end portion of the upright piece 55b of the support portion 55 toward the backrest 31b of the swivel seat 31. The horizontal piece 55a and the standing piece 55b of the support portion 55 are respectively fixed to the bottom surface and the right side surface of the seat portion 31a of the swivel seat 31 by bolt fastening or the like.

As shown in FIG. 5 or FIG. 6, the connecting member 53 is formed in a U-shaped cross section by pressing a metal plate or a metal plate, and includes a pair of flat plate portions 57a and 57b and the pair of flat plate portions. 57a, 57b is connected to the upper end of the connecting portion 58, and the connecting portion 58 is fixed by bolt fastening or the like in a state where it is accommodated in a recess 42b formed on the bottom bottom of the arm body 42. Thus, the connecting member 53 is fixed to the armrest 41.
4 to 6, the parallel link means 54 includes a pair of link bodies 59 and 60 formed in a U-shaped cross-section formed by pressing a metal plate. The end portion is pivotally supported by the upright piece 55 b of the support portion 55 of the support base 52 via a pivot pin 61 extending in the left-right direction, and the other end portion is a pair of flat plate portions of the connecting member 53. In a state sandwiched between 57a and 57b, the pair of flat plate portions 57a and 57b are pivotably supported via pivot pins 62 extending in the left-right direction.

Similarly, the rear link body 60 is pivotally supported by a pivot pin 63 extending in the left-right direction at one end portion at the base end portion of the extension portion 56 of the support base 52. The other end of the connecting member 53 is pivotally supported by a pair of flat plate portions 57a, 57b via a pivot pin 64 extending in the left-right direction while being sandwiched between the pair of flat plate portions 57a, 57b. ing.
The position adjusting mechanism 51 has angle setting means 71 for setting the swing angle of the pair of link bodies 59 and 60 of the parallel link means 54 to set the armrest 41 at a predetermined vertical position and front and rear position. It has become.

The angle setting means 71 includes a switching operation pin (switching operation member) 72 for performing a switching operation between the position setting state and the position adjustable state of the armrest 41, and a guide portion 73 that guides the movement of the switching operation pin 72. It consists of and.
As shown in FIG. 6, the switching operation pin 72 has a pole shape extending through the pair of flat plate portions 57a and 57b of the connecting member 53. The cross-sectional shape of the switching operation pin 72 is a short arc of a rectangular shape. It is formed in a curved oval shape. Further, as shown in FIG. 5, a retaining pin 72b is attached to the end portion of the switching operation pin 72 on the swivel seat 31 side to prevent the switching operation pin 72 from coming off from the guide portion 73. An operation lever 72 a that extends in the long axis direction of the switching operation pin 72 protrudes from the end opposite to the seat 31.

As shown in FIG. 6, the guide portion 73 includes a guide groove 74 formed in one flat plate portion 57 a located on the opposite side to the swivel sheet 31 among the pair of flat plate portions 57 a and 57 b of the connecting member 53. Of the pair of leg portions 60a and 60b of the rear link body 60, one flat plate portion 57a of the connecting member 53 is formed in the other flat plate portion 57b located on the swivel seat 31 side. The long hole 76 is formed in the leg part 60 a on the side, and the insertion hole 77 is formed in the leg part 60 b on the other flat plate part 57 b side of the connecting member 53.
Further, as shown in FIG. 5, the guide portion 73 is configured such that the link body 60 is paired with a pair of pivot pins 63, with the rear link body 60 sandwiched between the pair of flat plate portions 57 a and 57 b of the connecting member 53. 6
4, the guide groove 74, the long hole 76, the insertion hole 77, and the sliding groove 75 communicate with each other, and pass through the guide groove 74, the long hole 76, the insertion hole 77, and the sliding groove 75. The switching operation pin 72 is provided. In addition, a tension coil spring 78 is bridged between the switching operation pin 72 and the pivot pin 64, whereby the switching operation pin 72 is urged in a direction approaching the pivot pin 64. Yes.

As shown in FIG. 4, the guide groove 74 has a long groove 74 a that extends in an arc shape with the pivot axis formed by the pivot pin 64 as the center of curvature. The long groove 74a is formed in an angle range of about 30 degrees to 40 degrees counterclockwise starting from a position A located directly below the pivot pin 63, whereby the long groove 74a is formed in the swivel seat 31. On the other hand, it is formed longer in the front-rear direction than in the vertical direction.
Accordingly, by relatively moving the switching operation pin 72 in the long grooves 74a within the armrest 41 will be than the vertical greatly moved in the longitudinal direction toward the front upper side from the lower rear against the swivel seat 31 The movement space of the armrest 41 necessary for adjusting the position of the armrest 41 is minimized.

Further, a plurality of (four in this embodiment) engaging portions 74b extending toward the pivot formed by the pivot pin 64 are formed on the upper side of the long groove 74a in the longitudinal direction.
As shown in FIG. 6, the sliding groove 75 is formed in an arc shape at a position facing the long groove 74b with the pivot formed by the pivot pin 64 as the center of curvature, like the long groove 74b of the guide groove 74. ing.
As a result, the switching operation pin 72 relatively moves in the guide groove 74 and the sliding groove 75 as the parallel link means 54 swings, and a predetermined engagement among the plurality of engaging portions 74b. By engaging with the joint portion 74b, the parallel link means 54 is set to a predetermined swing angle with respect to the support base 52, and thereby the armrest 41 is set to a predetermined position setting state.

A long hole 76 formed in one leg portion 60a of the rear link body 60 enables movement of the switching operation pin 72 from the long groove 74a to the engaging portion 74b in the guide groove 74. Therefore, it is formed long in the urging direction by the tension coil spring 78.
On the other hand, the insertion hole 77 formed in the other leg portion 60b of the rear link body 60 is formed in an oblong shape slightly larger than the cross-sectional shape of the switching operation pin 72, thereby the switching operation pin. 72 is provided with a detent.
Therefore, when the operation lever 72 a is pressed toward the side opposite to the urging direction, one end of the switching operation pin 72 on the side of the long hole 76 and the guide groove 74 moves greatly up and down along the long hole 76. On the other hand, the other end of the switching operation pin 72 on the side of the insertion hole 77 and the sliding groove 75 is slightly moved up and down, so that the one end of the switching operation pin 72 is moved to the other end. Swings with respect to the portion, and moves from the engaging portion 74b to the long groove 74a.

The embodiment of the present invention has the above-described configuration. Next, the case where the position of the armrest 41 is adjusted will be described with reference to FIGS. 1, 4 and 5.
As shown by the solid line in FIG. 1, when the armrest 41 is set in the position setting state at the position most rearward and lower with respect to the swivel seat 31, the switching operation pin 72 of the angle setting means 71 is provided on the guide portion 73. A pair of link bodies 59 and 60 of the parallel link means 54 of the position adjusting mechanism 51 are engaged with an engagement portion 74b formed at the foremost portion of the engagement portion 74b of the guide groove 74. In this state, it is inclined backward with the largest swing angle set with respect to the support base 52.

When the position of the armrest 41 is adjusted from the position setting state, first, as shown by an arrow in FIG. 5, the operation lever 72 a of the switching operation pin 72 is directed to the opposite side to the biasing direction of the switching operation pin 72. And press it.
At this time, as indicated by a two-dot chain line in FIG. 5, the switching operation pin 72 swings with respect to the other end against the biasing force of the tension coil spring 78, and the guide groove 74. The engagement portion 74b is released and moved into the long groove 74a. As a result, the pair of link bodies 59 and 60 of the parallel link means 54 are swingable, and accordingly, the armrest 41 is switched from the position setting state to the position adjustable state.

Next, the state in which the operation lever 72 a is pressed is held, and the pair of link bodies 59 and 60 are swung while the one end of the switching operation pin 72 is moved into the long groove 74 a of the guide groove 74. The armrest 41 is moved forward and upward.
At this time, the switching operation pin 72 shown in FIG. 4 is guided by the long groove 74a and the sliding groove 75 of the guide groove 74 and relatively moves in the long groove 74a and the sliding groove 75, and accordingly, a pair of links The bodies 59 and 60 rise from a posture inclined rearward with respect to the support base 52, whereby the armrest 41 translates obliquely forward from the rear lower side toward the front upper side.

Then, after setting the armrest 41 to the desired front / rear position and vertical position, the pressing lever 72a of the switching operation pin 72 is released, so that the one end of the switching operation pin 72 has a tension coil spring 78. According to the urging force, the guide groove 74 moves from the long groove 74a to the engaging portion 74b corresponding to the front and rear position and the vertical position, and engages with the engaging portion 74b.
Accordingly, for example, as shown by a two-dot chain line in FIG. 1, the pair of link members 59 and 60 are held at a predetermined swing angle, and the armrest 41 is set to a desired front and rear position and vertical position from a position adjustable state. The position setting state is set again.

According to the above-described embodiment, the armrest 41 can be adjusted from the position setting state to the arbitrary front-rear position and the vertical position by an easy operation of pressing the switching operation pin 72 in the direction opposite to the biasing direction. Can be switched to a position that can be adjusted. Further, the switching operation pin 72 is engaged with the engaging portion 74b of the guide groove 74 of the guide portion 73 according to the urging force by an easy operation to release the pressing of the switching operation pin 72, whereby the armrest 41 is positioned. It is switched from the adjustable state to the position setting state again.
Further, the angle setting means 71 of the position adjustment mechanism 51 is such that the long groove 74a of the guide groove 74 is formed longer in the front-rear direction than in the vertical direction, as described above, so that the armrest 41 is provided with the guide groove 74 of the switching operation pin 72. With the relative movement in the long groove 74a, the moving space larger in the front-rear direction than in the vertical direction is translated.

Therefore, the movement space is minimized, and the degree of freedom of arrangement of each device of the driving control device 30 is increased, and the cabin 8 can be downsized.
Further, since the armrest 41 is connected to the support base 52 through the parallel link means 54 so as to be movable in the front-rear direction and the vertical direction, the position of the armrest 41 and the support base 52 and swivel of the armrest 41 are adjusted. The mounting posture with respect to the seat 31 is not changed.
Therefore, the operator does not need to hold the armrest 41 set in the position adjustable state in a predetermined mounting posture, and can easily perform only the position adjustment of the armrest 41 in the front-rear direction and the vertical direction with respect to the swivel seat 31. It can be done.

Further, according to the position adjusting mechanism 51 and the angle setting means 71 as described above, even when the armrest 41 set to a predetermined position setting state is changed to another position setting state, by operating the switching operation pin 72. The armrest 41 can be easily set to the predetermined position setting state again.
As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to said embodiment.
For example, the switching operation pin 72 may be biased toward the pivot pin 63 on the support base 52 side of the rear link body 60, and in this case, the guide groove 74 of the guide portion 73 has the pivot support pin 63. A long groove 74a having a pivot center formed by the pin 63 and having a center of curvature, and a plurality of engaging portions 74b formed below the midway portion in the longitudinal direction of the long groove 74a.

Alternatively, the angle adjusting means 71 may be employed in which the guide groove 74 of the guide portion 73 is formed in the support base 52 and the guide portion 73 and the switching operation pin 72 inserted through the guide groove 74 are provided.
Moreover, the cross-sectional shape of the switching operation pin 72 may adopt an elliptical shape, a rectangular shape, a polygonal shape, or the like, and is inserted through the long hole 76 and the insertion hole 77 formed in the rear link body 60. Any cross-sectional shape may be employed as long as it does not rotate easily.
Further, the switching operation pin 72 only needs to be inserted into one of the pair of link bodies 59, 60, so that the angle setting means 71 is connected to the front link body 59 instead of the rear link body 60. Of course, it is also possible to provide it.

Moreover, it is needless to say that the armrest device 40 according to the present invention can be employed in other work vehicles such as a backhoe and a TLB work machine. Accordingly, in the present embodiment, the armrest device 40 employed only on the right side of the swivel seat 31 may be provided on the left side or both sides of the swivel seat 31 .

It is a right view of the armrest apparatus concerning embodiment of this invention. It is a perspective view which shows the attachment state to the swivel seat of this armrest apparatus. It is a perspective view which shows the operation part of the armrest of this armrest apparatus. It is a principal part enlarged side view which shows the position adjustment mechanism of this armrest apparatus. It is sectional drawing which follows the BB line of FIG. It is a perspective view which shows a connection member, a pair of link body, and a switching operation pin. It is a left view of the tractor concerning embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 Tractor 8 Cabin 28 Driver's operation seat 31 Swivel seat 40 Armrest apparatus 41 Armrest 42 Arm main body 43 Operation part 51 Position adjustment mechanism 52 Support stand 53 Connecting member 54 Parallel link means 59 Link body 60 Link body 71 Angle setting means 72 Switching operation pin 73 Guide part 74 Guide groove 75 Sliding groove 76 Long groove 77 Insertion hole 78 Tension coil spring

Claims (2)

An armrest (41) having an operating portion (43) and disposed on the side of the driver seat (31 ) and having an arm body (42) , and the armrest (41) with respect to the driver seat (31) And a position adjustment mechanism (51) that supports the position adjustment in the vertical direction and the vertical direction, and the position adjustment mechanism (51) has a switching operation for switching the armrest (41) between a position setting state and a position adjustable state. A member (72) is provided ;
The position adjusting mechanism (51) has a support base (52) attached to the side of the driver's seat (31) and a pair of left and right flat plates (57a, 57b) connected to the arm body (42). The connecting member (53), the parallel link means (54) for connecting the connecting member (53) and the support base (52), and the swinging of the pair of front and rear link bodies (59, 60) of the parallel link means (54). Angle setting means (71) for setting a moving angle,
The switching operation member (72) is provided so as to penetrate one link body (60) of the parallel link means (54), and the angle setting means (71) is provided on the left and right sides of the connecting member (53). Each of the guide grooves (74) includes a guide groove (74) and a slide groove (75) that are formed in the flat plate portions (57a, 57b) and guide the movement of the switching operation member (72). A plurality of engaging portions (74b) for engaging with the switching operation member (72) and setting the swing angle of the one of the front and rear link bodies (60) are formed,
The switching operation member (72) has an operation lever (72a) for swinging the guide groove (74) side with respect to the sliding groove (75) side to engage and disengage with the engaging portion (74b). An armrest device characterized by being provided . The cross-sectional shape of the switching operation member (72) and the switching operation member insertion hole (77) of the one link body (60) are formed in an oval shape, and the switching operation member (72) is formed by the spring (78). The armrest device according to claim 1, wherein the armrest device is biased so as to be engaged with an engaging portion (74b) of the guide groove (74) .

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