JP6162620B2 - Armrest device - Google Patents

Description

  The present invention relates to an armrest device including an armrest provided on a lateral side portion of a driver seat.

  As an armrest device as described above, for example, an armrest device described in Patent Literature 1 (in the literature, an armrest device [40]) is already known. The armrest device described in Patent Literature 1 includes a height adjustment mechanism (in the literature, a position adjustment mechanism) for adjusting the height of the armrest (in the literature, the armrest [41]) with respect to the driver seat (swivel seat [31]). [51]). The height of the armrest can be adjusted according to the physique of the driver by the height adjustment mechanism.

JP 2005-335429 A

  In the conventional armrest device, the height of the armrest can be adjusted according to the physique of the driver by the height adjusting mechanism, but the armrest cannot be moved to a position where it is difficult to get in and out of the vehicle.

  In view of the above situation, there is a demand for an armrest device including an armrest that can be adjusted in height according to the physique of the driver and can be moved to a position where it is difficult to get in and out.

The features of the present invention are:
An armrest provided on the side of the driver seat;
A height adjustment mechanism for adjusting the height of the armrest with respect to the driver seat;
A swing-up mechanism that supports the armrest so as to be swingable around a swing axis that is transverse to the driver's seat, and for flipping the armrest from a use position to a non-use position ;
The height adjustment mechanism includes a base provided on the driver's seat side, a bracket provided on the armrest side, and an elongated hole formed in one of the base and the bracket in a vertical direction, A bolt inserted through the elongated hole and fixing the base and the bracket;
In either one of the base and the bracket, a protrusion corresponding to the elongated hole is formed at a portion corresponding to the elongated hole, and an edge of the protruding portion is in contact with an edge of the elongated hole. There is to do.

According to this characteristic configuration, the height of the armrest can be adjusted according to the physique of the driver by the height adjusting mechanism. Further, the armrest is unlikely to obstruct getting on and off by jumping up the armrest from the use position to the non-use position by the jumping mechanism. Moreover, the height adjustment mechanism can be simply configured by the configuration in which the vertical position of the bracket with respect to the base is adjusted by the long hole.

Furthermore, in the present invention,
It is preferable that the jumping mechanism is provided at a position behind the height adjusting mechanism in the armrest.

  According to this characteristic configuration, it is easy to set the support position of the armrest by the jumping mechanism to a portion closer to the rear side of the armrest. Accordingly, the armrest is retracted toward the rear side with respect to the driver's seat in the non-use position, so that the armrest is unlikely to obstruct getting on and off.

Furthermore, in the present invention,
It is preferable that the jumping mechanism is provided at a rear end portion of the armrest.

  According to this feature configuration, by setting the support position of the armrest by the jumping mechanism to the rear end of the armrest, the armrest retracts further toward the rear side with respect to the driver's seat in the non-use position posture. The armrest is unlikely to get in the way of getting on and off.

Furthermore, in the present invention,
The jumping mechanism includes an armrest support member that supports the armrest, a lateral swing shaft that is provided on the armrest support member and is swingably attached to the armrest, and the armrest with respect to the swing shaft. A friction holding mechanism capable of holding friction ,
The said bracket before and Symbol armrest support member, it is preferable to be constituted by the same member.

According to this characteristic configuration, the posture of the armrest in the use position and the non-use position is stabilized by frictionally holding the armrest by the friction holding mechanism. That is, it is difficult for the armrest to rattle in each posture of the use position and the non-use position . Et al is, by sharing the member with the drive-up mechanism and the height adjusting mechanism can be made compact costs and both mechanisms by reducing the number of components.

Furthermore, in the present invention,
The friction holding mechanism preferably includes a friction plate that acts on the armrest from a lateral direction, and a biasing member that presses the friction plate against the armrest.

  According to this configuration, the friction holding mechanism can be simply configured by pressing the friction plate against the armrest by the biasing member.

Furthermore, in the present invention,
It is preferable that a knob nut is attached to a tip portion of the bolt on the side of the base and the bracket that is located laterally inward with respect to the driver seat.

  According to this feature, the height of the knob nut can be easily adjusted without using a tool by manually tightening and tightening the knob nut, and the hand can easily reach the knob nut from the lateral inner side with respect to the driver seat.

Furthermore, in the present invention,
The knob nut is preferably retracted to the side of the lateral center of the armrest from the lateral side surface of the armrest when attached to the tip of the bolt.

  According to this characteristic configuration, the knob nut does not protrude from the lateral side surface of the armrest, and therefore the knob nut is unlikely to obstruct the driver seated on the driver seat.

It is a right view which shows a tractor. It is a top view which shows a tractor. It is a right view which shows a driver's seat and an armrest apparatus. It is a top view which shows a driver's seat and an armrest apparatus. It is a right perspective view showing an armrest device. It is a right side partial sectional view showing a height adjusting mechanism and a jumping mechanism. It is a right perspective view showing a height adjustment mechanism and a jumping mechanism. It is a left perspective view showing a height adjustment mechanism and a jumping mechanism. It is IX-IX sectional drawing in FIG. It is XX sectional drawing in FIG. It is a rear view which shows a height adjustment mechanism and a raising mechanism. It is a right side partial sectional view showing a state where the armrest is flipped up to a non-use position. It is sectional drawing which shows a friction holding mechanism.

  EMBODIMENT OF THE INVENTION The form for implementing this invention is demonstrated based on drawing.

[Overall structure of tractor]
1 and 2 show a tractor as a work vehicle. The tractor includes a traveling machine body 3 having a front wheel 1 and a rear wheel 2. A bonnet 4 is provided at the front of the traveling machine body 3. An engine 5 is housed in the bonnet 4. A mission case 6 is connected to the rear end of the engine 5. The transmission case 6 houses a transmission (not shown) that changes the power from the engine 5. A rotary tiller 7 is connected to the rear end of the mission case 6 via a link mechanism 8 so as to be movable up and down. Power from the mission case 6 is transmitted to the rotary tiller 7 via the PTO shaft 9.

  A driving unit 10 is provided at the rear of the traveling machine body 3. The driving unit 10 is provided with a steering handle 11 and a driver seat 12. An armrest device 13 is provided on the right side of the driver seat 12.

[Driver seat]
As shown in FIG. 3, the driver seat 12 is placed and supported on the driver seat frame 14. The front end portion of the seat portion of the driver seat 12 is supported by the support portion 14a of the driver seat frame 14 so as to be swingable about the swing axis X1 directed in the left-right direction. The driver seat frame 14 is configured to be position adjustable in the front-rear direction.

[Armrest device]
As shown in FIGS. 3 to 5, the armrest device 13 includes an armrest 15, a height adjustment mechanism 16, and a jumping mechanism 17.

[Armrest]
The armrest 15 includes a shift lever 27 for shifting operation of the transmission, a lifting lever 28 for lifting operation of the rotary tiller 7, a swinging lift switch 31 for lifting operation of the rotary tiller 7, Is provided. The armrest 15 is formed so as to be inclined so as to be positioned on the right side as the front portion approaches the front end with respect to the rear portion in plan view.

  The armrest 15 includes a frame 19 and a cover 18 that is externally mounted on the frame 19. The cover 18 is configured by an upper cover 20 and a lower cover 21 that are vertically aligned. A hand placement portion 22 for hand placement is formed at the front portion of the upper cover 20. An elbow rest portion 23 for elbow rest is formed at the rear portion of the upper cover 20. A recessed portion 24 is formed between the hand placing portion 22 and the elbow placing portion 23 in the upper cover 20.

[Hand rest]
The hand placement part 22 is formed with a high-order part 25 and a low-order part 26 having different height positions. Specifically, a high-order portion 25 is formed on the left side portion of the hand placement portion 22 across the boundary line L1, and the high portion 25 is formed on the right side portion of the hand placement portion 22 across the boundary line L1. A low level portion 26 is formed.

  A shift lever 27 is disposed in the high position portion 25 so as to swing in the front-rear direction. The transmission lever 27 is disposed on the left side of the lift lever 28 (inside of the lift lever 28). That is, the transmission lever 27 is disposed closer to the driver seat 12 than the lift lever 28 in the vehicle width direction. A guard 29 is provided on the left side of the hand placement portion 22 to prevent erroneous operation of the speed change lever 27.

  An elevating lever 28 is disposed on the lower portion 26 so as to swing in the front-rear direction. When the elevating lever 28 is operated forward, the rotary tiller 7 is lowered, and when the elevating lever 28 is operated rearward, the rotary tiller 7 is raised.

(Recessed part)
The recessed portion 24 is formed so as to be recessed downward with respect to a connection line L2 connecting the top of the hand placing portion 22 and the top of the elbow placing portion 23. A lift switch 31 is disposed in a portion (left upper surface portion 30) on the left side of the recessed portion 24 with respect to the boundary line L1. That is, the up / down switch 31 is disposed in a portion of the recessed portion 24 closer to the lateral inner side. In other words, the up / down switch 31 is disposed in a portion of the recessed portion 24 that is closer to the driver's seat 12 in the vehicle width direction. Further, a portion of the left upper surface portion 30 corresponding to the lift switch 31 is formed to be recessed downward with respect to a portion other than the portion corresponding to the lift switch 31 of the left upper surface portion 30. That is, the recessed portion 30 a is formed in the left upper surface portion 30 as a portion corresponding to the lift switch 31. The recessed portion 30a is formed so as to open to the left side (lateral inner side).
That is, the recessed portion 30a is formed so as to open toward the driver seat 12 in the vehicle width direction.

[Elevation switch]
The lift switch 31 is disposed behind the speed change lever 27 and the lift lever 28. That is, the lift switch 31 is disposed behind the guard 29 and ahead of the bent portion P between the front portion and the rear portion of the armrest 15. Moreover, the raising / lowering switch 31 is comprised with what is called a seesaw switch, and is arrange | positioned so that it may rock | fluctuate in the front-back direction. The swing direction D1 of the lift switch 31 is set to be substantially parallel to the swing direction D2 of the lift lever 28, and is also set to be substantially parallel to the swing direction D3 of the speed change lever 27. .

  The raising / lowering switch 31 has a part 31 a for lowering the rotary tiller 7 and a part 31 b for raising the rotary tiller 7. When the part 31a for the lowering operation of the raising / lowering switch 31 is pushed, the rotary tiller 7 is automatically lowered to the lowest position, and when the part 31b for the raising operation of the raising / lowering switch 31 is pushed, the rotary tiller 7 Rises automatically to the uppermost position. In addition to the lift switch 31, a switch (not shown) having a function like the lift switch 31 may be disposed around the steering handle 11.

  The front portion of the lift switch 31 is a lower operation portion 31a, and the rear portion of the lift switch 31 is a lift operation portion 31b. That is, the swinging direction of the lifting switch 31 for lowering the rotary tiller 7 and the swinging direction of the lifting lever 28 are matched to the front side, and the lifting switch 31 for lifting the rotary tiller 7 is adjusted. The swinging direction and the swinging direction of the elevating lever 28 are matched to the rear side.

[Height adjustment mechanism]
As shown in FIGS. 6 to 10, the height adjustment mechanism 16 is for adjusting the height of the armrest 15 with respect to the driver seat 12. The height adjustment mechanism 16 includes a base 32 provided on the driver seat 12 side and a bracket 33 provided on the armrest 15 side.

〔base〕
The base 32 is fixed to the frame 34 on the driver seat frame 14 side by bolts 35. The base 32 is configured to be position-adjustable in the left-right direction with respect to the frame 34 (driver's seat frame 14) by a long hole (not shown) that is long in the left-right direction through which the bolt 35 is inserted. The base 32 is formed with a first long hole 32a (corresponding to a “long hole” according to the present invention) that is long in the vertical direction and a second long hole 32b that is long in the vertical direction. The first long hole 32a is configured by a substantially rectangular long hole (long angle hole) that is long in the vertical direction. The second long hole 32b is configured by a substantially oblong long hole (long round hole) that is long in the vertical direction. The first long hole 32 a is formed offset to the upper end side of the base 32, and the second long hole 32 b is formed offset to the lower end side of the base 32. The lower end portion of the first elongated hole 32a and the upper end portion of the second elongated hole 32b overlap in the vertical direction.

〔bracket〕
The bracket 33 is disposed on the left side of the base 32 (laterally inner side than the base 32). That is, the bracket 33 is disposed closer to the driver seat 12 than the base 32 in the vehicle width direction. Further, the rear end of the bracket 33 protrudes rearward from the rear end of the base 32. The front end of the bracket 33 is retracted rearward from the front end of the base 32.

  A bent portion 33 a that is bent to the left side is formed at the upper end portion of the bracket 33. A support portion 33b is formed at the rear end portion of the bent portion 33a. A left and right swing shaft 33c is provided on the support portion 33b so as to protrude rightward. The rear end portion of the bracket 33 is provided with a flange portion 33d extending over the right side surface and the support portion 33b. A portion of the bracket 33 corresponding to the first long hole 32a is formed with a substantially circular protrusion 33e that protrudes toward the base 32 (right side). The edge of the protrusion 33 e is in contact with the edge of the first long hole 32 a in the base 32.

  The bracket 33 is fixed to the base 32 by a first bolt 36 (corresponding to a “bolt” according to the present invention) and a second bolt 37. The 1st volt | bolt 36 is comprised by the square root volt | bolt, and the square root part 36a is fitting to the 1st long hole 32a among the 1st volt | bolts 36. As shown in FIG. The first bolt 36 is inserted from the right side of the base 32 into the first long hole 32a (the first long hole 32a toward the inner side). That is, the 1st volt | bolt 36 is inserted in the 1st long hole 32a toward the driver's seat 12 side in the vehicle width direction. A knob nut 38 is attached to the tip of the first bolt 36. That is, the knob nut 38 is attached to the distal end portion of the first bolt 36 on the side of the bracket 33 located on the lateral inner side of the base 32 and the bracket 33. In other words, the knob nut 38 is attached to the tip end portion of the first bolt 36 on the bracket 33 side that is located on the driver seat 12 side in the vehicle width direction of the base 32 and the bracket 33. Further, the knob nut 38 is retracted to the right side (left and right center side of the armrest) from the left side surface of the armrest 15 in a state where the knob nut 38 is attached to the distal end portion of the first bolt 36. That is, the knob nut 38 enters the space below the bent portion 33a.

  The second bolt 37 is constituted by a stepped bolt, and a stepped portion (large diameter portion) 37a of the second bolt 37 is fitted in the second long hole 32b. The second bolt 37 is inserted from the right side of the base 32 into the second long hole 32b (second long hole 32b toward the inner side). That is, the second bolt 37 is inserted into the second long hole 32b toward the driver seat 12 in the vehicle width direction. A nut 39 (welding nut) corresponding to the second bolt 37 is fixed to the left side surface of the bracket 33.

[Height adjustment method by height adjustment mechanism]
First, the bracket 33 is released from being fixed to the base 32 by loosening the knob nut 38. Next, the height of the armrest 15 relative to the driver seat 12 is changed by moving the bracket 33 in the vertical direction with respect to the base 32. The second bolt 37 is tightened by a tightening force that does not hinder the vertical movement of the bracket 33 with respect to the base 32. Finally, the bracket 33 can be fixed to the base 32 at the changed height by tightening the knob nut 38. 3 shows a state in which the armrest 15 is located at the uppermost position, and FIG. 6 shows a state in which the armrest 15 is located at the lowest position.

  Here, as described above, the edge of the protrusion 33 e is in contact with the edge of the first long hole 32 a in the base 32. Thereby, it is considered that a frictional force is generated between the protrusion 33e and the edge of the first long hole 32a. Therefore, even if the first bolt 36 is not strongly tightened, a certain holding force is exerted by the frictional force.

  Further, as described above, the first long hole 32 a and the second long hole 32 b are formed in the base 32. That is, the first long hole 32 a and the second long hole 32 b are formed in the base 32 positioned laterally outside of the base 32 and the bracket 33. In other words, the first long hole 32a and the second long hole 32b are formed in the base 32 located on the opposite side of the driver seat 12 in the vehicle width direction among the base 32 and the bracket 33. In this regard, if a long hole corresponding to the first long hole 32 a and a long hole corresponding to the second long hole 32 b are formed in the bracket 33, the bracket 33 is moved in the vertical direction with respect to the base 32. In addition, objects (for example, the clothes of the driver sitting on the driver's seat 12) are likely to be caught in these long holes, but this is unlikely to occur.

(Jump mechanism)
As shown in FIG. 12, the jumping mechanism 17 supports the armrest 15 so as to be swingable around the swing axis X <b> 2 that faces in the left-right direction, and moves the armrest 15 from the use position (the position indicated by the solid line) to the non-use position (two This is for jumping up to the position indicated by the chain line. The jumping mechanism 17 is provided in the rear portion of the armrest 15 relative to the height adjusting mechanism 16, specifically, at the rear end portion of the armrest 15. That is, the swing axis X <b> 2 is disposed at the rear end portion of the armrest 15.

  The flip-up mechanism 17 swings the armrest 15 with a bracket 33 (corresponding to an “armrest support member” according to the present invention) that supports the armrest 15, a left-right swing shaft 33 c to which the armrest 15 is swingably attached, and the armrest 15. And a friction holding mechanism 40 capable of friction holding with respect to the moving shaft 33c. As described above, the height adjustment mechanism 16 has the bracket 33 provided on the armrest 15 side. The bracket 33 of the jumping mechanism 17 and the bracket 33 of the height adjustment mechanism 16 are the same. It is composed of members. A boss portion 19a of the frame 19 is swingably attached to the swing shaft 33c.

(Friction holding mechanism)
As shown in FIG. 13, the friction holding mechanism 40 includes a pair of friction plates 41 and a pair of disc springs 42 (corresponding to “biasing members” according to the present invention). The pair of friction plates 41 are arranged so as to sandwich the boss portion 19a of the frame 19 from both the left and right sides so as to act on the boss portion 19a of the frame 19 from both the left and right sides. The pair of disc springs 42 are disposed on the right side of the boss portion 19a of the frame 19 so as to press the pair of friction plates 41 against the boss portion 19a of the frame 19 from both the left and right sides. The pair of disc springs 42 are sandwiched between the left and right sides by a pair of flat washers 43. A nut 44 for adjusting the biasing force of the disc spring 42 is attached to the right end portion of the swing shaft 33c.

  According to such a configuration, the flat washer 43 on the left side of the pair of flat washers 43 between the left end of the boss part 19 a of the frame 19 and the support part 33 b of the bracket 33 and the right end of the boss part 19 a of the frame 19. The armrest 15 can be frictionally held between the use position and the non-use position by generating a frictional force between the use position and the use position. In order to adjust the friction force, the nut 44 may be tightened or loosened.

  Here, a bent portion 19b that is bent into a substantially L shape is formed at the rear end portion of the frame 19. An operating harness in the armrest device 13 can be attached to the bent portion 19b via a clamp. A notch groove 19c is formed at the rear end of the bent portion 19b.

  As shown in FIG. 6, the frame 19 is provided with a left and right stopper shaft 19d that protrudes to the right. The stopper shaft 19d is disposed at a position where it can come into contact with the front end portion of the bent portion 33a of the bracket 33 from above. A buffer rubber 19e is attached to the stopper shaft 19d.

  As shown in FIG. 6, when the armrest 15 is in the use position, the stopper shaft 19 d is in contact with the front end portion of the bent portion 33 a of the bracket 33. Thereby, the downward swing of the armrest 15 is restrained. On the other hand, as shown in FIG. 12, when the armrest 15 is in the non-use position, the end edge 19f of the cutout groove 19c is the bracket 19f with the rear end of the bracket 33 entering the cutout groove 19c of the bent portion 19b. 33 is in contact with the rear end. Thereby, the upward swing of the armrest 15 is restrained. As described above, the bracket 33 has a function as a member for determining the jumping amount of the armrest 15 (the swing range of the armrest 15).

[Other Embodiments] (1) In the above embodiment, the armrest 15 is provided on the right side of the driver seat 12, but may be provided on the left side of the driver seat 12.

(2) In the above-described embodiment, the jumping mechanism 17 is provided in a portion of the armrest 15 that is behind the height adjusting mechanism 16, but in the armrest 15 that is in front of the height adjusting mechanism 16. It may be provided. Further, although the jumping mechanism 17 is provided at the rear end portion of the armrest 15, it may be provided at a portion of the armrest 15 in front of the rear end portion (for example, the front and rear central portion of the armrest 15). Good.

(3) In the above embodiment, the “armrest support member” of the jumping mechanism 17 and the “bracket” of the height adjustment mechanism 16 are composed of the same member (bracket 33), but are separate members. It may be comprised.

(4) In the above embodiment, the friction holding mechanism 40 includes a pair of friction plates 41, but may be configured to include only one of the pair of friction plates 41.

(5) In the above embodiment, the friction holding mechanism 40 includes a pair of disc springs 42, but may include only one of the pair of disc springs 42. In addition, a coil spring may be employed as the “biasing member” instead of the disc spring 42.

(6) In the embodiment described above, the knob nut 38 is attached to the tip of the first bolt 36 on the side of the base 32 and the bracket 33 that is located laterally inward of the driver seat 12. The invention is not limited to this. That is, the knob nut 38 may be attached to the tip of the first bolt 36 on the side of the base 32 and the bracket 33 that is located laterally outward with respect to the driver seat 12.

(7) In the above embodiment, the knob nut 38 is retracted to the right side (the left and right center side of the armrest) from the left side surface of the armrest 15 in a state where the knob nut 38 is attached to the tip of the first bolt 36. The armrest 15 may protrude leftward from the left side surface.

  The present invention can be used for a combine, a rice transplanter, a construction machine, and other work vehicles in addition to the tractor.

12 Driver's seat 15 Armrest 16 Height adjustment mechanism 17 Lifting mechanism 32 Base 32a First long hole (long hole)
33 Bracket (armrest support member, bracket)
33c Oscillating shaft 36 First bolt (bolt)
38 Knob nut 40 Friction holding mechanism 41 Friction plate 42 Belleville spring (biasing member)
X2 swing axis

Claims (7)

An armrest provided on the side of the driver seat;
A height adjustment mechanism for adjusting the height of the armrest with respect to the driver seat;
A swing-up mechanism that supports the armrest so as to be swingable around a swing axis that is transverse to the driver's seat, and for flipping the armrest from a use position to a non-use position ;
The height adjustment mechanism includes a base provided on the driver's seat side, a bracket provided on the armrest side, and an elongated hole formed in one of the base and the bracket in a vertical direction, A bolt inserted through the elongated hole and fixing the base and the bracket;
In either one of the base and the bracket, a protrusion corresponding to the elongated hole is formed at a portion corresponding to the elongated hole, and an edge of the protruding portion is in contact with an edge of the elongated hole. armrest device that.   The armrest device according to claim 1, wherein the jumping mechanism is provided in a portion of the armrest that is rearward of the height adjustment mechanism.   The armrest device according to claim 2, wherein the jumping mechanism is provided at a rear end portion of the armrest. The jumping mechanism includes an armrest support member that supports the armrest, a lateral swing shaft that is provided on the armrest support member and is swingably attached to the armrest, and the armrest with respect to the swing shaft. A friction holding mechanism capable of holding friction ,
Before SL armrest with the support member and the bracket, armrest device according to claim 1, which consists of the same members in any one of 3.   The armrest device according to claim 4, wherein the friction holding mechanism includes a friction plate acting on the armrest from a lateral direction, and a biasing member that presses the friction plate against the armrest.   6. The armrest device according to claim 4, wherein a knob nut is attached to a front end portion of the bolt on a side of the base and the bracket that is located laterally inward with respect to the driver seat.   The armrest device according to claim 6, wherein the knob nut is retracted to a lateral center side of the armrest from a lateral side surface of the armrest in a state where the knob nut is attached to a distal end portion of the bolt.

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