JP4084738B2 - Armrest device - Google Patents

Description

  The present invention relates to an armrest device provided corresponding to a seat.

2. Description of the Related Art Conventionally, for example, an armrest device used in a work machine or the like includes a main body portion accommodated in an upper portion of a console provided on a side portion of a seat. A spring for biasing the main body upward is provided at the lower part of the main body in the console. Furthermore, an operation lever is provided at the rear part of the main body so as to be rotatable in the vertical direction. In addition, this control lever is operated in the vertical direction so that the lock pin provided at the tip moves forward and backward, and the lock pin is moved forward and backward to lock the vertical movement of the main body due to the spring force. Or cancel. Further, the operation lever is provided with a position return spring that urges the operation lever by the rotation of the operation lever and returns the position of the operation lever (see, for example, Patent Document 1).
JP 2001-26949 A (page 3-5, FIG. 3)

  However, in the above-described armrest device, it is necessary to provide a spring for urging the main body portion upward and a spring for returning the position of the operation lever, and it is not easy to simplify the configuration and save space. Have.

  The present invention has been made in view of these points, and an object of the present invention is to provide an armrest device capable of simplifying the configuration and saving space.

  The invention according to claim 1 is an armrest device provided corresponding to the seat, wherein the body portion is movably provided in the vertical direction with respect to the seat, and the movable direction of the body portion is used as an axis in the body portion. A lever provided so as to be rotatable, a lock mechanism capable of fixing the vertical position of the main body with respect to the seat, and urging the main body upward, so that at least a part of the lever rotates as the lever rotates. The lock mechanism releases the fixing of the vertical position of the main body relative to the sheet and urges the lock mechanism in the return direction, and the vertical position of the main body relative to the sheet is fixed by the lock mechanism by rotating in the return direction. And an urging means for returning the rotation of the lever. The urging means for urging the main body portion movably provided in the vertical direction with respect to the seat is movable. When the lever pivots around the direction, the lock mechanism unlocks the vertical position of the main body relative to the seat and urges the lock mechanism in the return direction. By fixing the vertical position of the main body with respect to the seat with a lock mechanism and also returning the rotation of the lever, the configuration can be simplified and the space can be saved.

  According to a second aspect of the present invention, in the armrest device according to the first aspect, the lever is provided so as to be rotatable in the horizontal direction in the vicinity of the main body, and in a state where the lever and the main body are gripped. The main body can be operated in the vertical direction, and the operability is improved.

  The invention according to claim 3 is the armrest device according to claim 1 or 2, wherein the biasing means is a torsion coil spring, the lever is partially inserted into the torsion coil spring, and the bias By using a torsion coil spring as a means and inserting a part of the lever into the torsion coil spring, the configuration can be simplified and the space can be saved.

  According to a fourth aspect of the present invention, in the armrest device according to the third aspect, the lock mechanism is a fixed claw provided integrally with the torsion coil spring in a part of the torsion coil spring. By using a fixed claw provided integrally with the torsion coil spring in a part of the spring, for example, as compared with the case where the fixed claw is provided separately from the torsion coil spring, the fixed claw is assembled to the torsion coil spring at the time of manufacture. There is no need to improve assembly.

  According to a fifth aspect of the present invention, in the armrest device according to the third aspect, the lock mechanism is a fixed claw that is formed separately from the torsion coil spring and is integrally fitted to the torsion coil spring. By forming the mechanism separately from the torsion coil spring and fitting it integrally with this torsion coil spring, for example, it is easier to form the fixing claws than when the fixing claw is provided integrally with the torsion coil spring. Is possible.

  According to the first aspect of the present invention, the urging means for urging the main body portion upward rotates with the rotation of the lever whose axis is the movable direction of the main body portion, and the main body against the sheet by the lock mechanism. The fixing of the vertical position of the part is released and the lock mechanism is urged in the return direction, and the vertical position of the main body part with respect to the seat is fixed by the lock mechanism and the lever is returned by rotating in the return direction. By combining the functions, the configuration can be simplified and the space can be saved.

  According to the second aspect of the present invention, the main body can be operated in the vertical direction with the lever and the main body held, and the operability can be improved.

  According to the invention described in claim 3, the configuration can be simplified and the space can be saved by inserting a part of the lever into the torsion coil spring using the biasing means as the torsion coil spring.

  According to the fourth aspect of the present invention, the locking mechanism is a fixed claw provided integrally with the torsion coil spring in a part of the torsion coil spring, for example, compared with the case where the fixed claw is provided separately from the torsion coil spring. Thus, it is not necessary to assemble the fixing claw to the torsion coil spring at the time of manufacture, and the assembling property can be improved.

  According to the fifth aspect of the present invention, the lock mechanism is formed separately from the torsion coil spring and is integrally fitted to the torsion coil spring, so that, for example, a fixed claw is provided integrally with the torsion coil spring. Thus, the fixed claw can be easily formed.

  Hereinafter, the present invention will be described in detail with reference to the embodiment shown in FIGS.

  FIG. 3 shows a seat 1, which serves as a driver's seat such as a hydraulic excavator that is a working machine as a vehicle. Hereinafter, the front-rear direction and the width direction will be described as the front-rear direction and the width direction of the seat 1.

  The seat 1 includes a base 2, a seat 3 provided at the top of the base 2 so as to be slidable in the front-rear direction, and a rear part of the seat 3 that rotates in the front-rear direction with respect to the seat 3. A backrest portion 4 is provided so as to be movable and tiltable.

  A console 5 is provided on the side of the seat 1, and an armrest device 6 is attached to the top of the console 5.

  The armrest device 6 includes a case 11 as a main body part, an armrest part 12 provided on the upper part of the case 11, and a height adjusting mechanism 13 provided below the rear part of the case 11.

  The case 11 is formed in a longitudinal shape in the front-rear direction, and projects forward from the vicinity of the front side of the backrest portion 4 of the seat 1.

  The armrest portion 12 is a portion formed of a relatively soft synthetic resin such as urethane in a longitudinal shape in the front-rear direction, and an operator, that is, an operator, places the arm on the upper surface.

  The height adjusting mechanism 13 includes a bottomed rectangular tube-shaped storage tube portion 21 projecting upward from the rear portion of the console 5, and a lower end portion inclined downward from the rear portion of the case 11 to the storage tube portion 21. And a protruding cylindrical portion 22 having a rectangular tube shape as a protruding portion into which is inserted.

  The accommodating cylinder portion 21 is fixed relative to the seat 1. Further, the housing cylinder portion 21 is provided with an upper resin sleeve (not shown) as a bearing member attached to the inner edge portion of the upper end opening. The upper resin sleeve guides or guides the vertical movement of the protruding cylindrical portion 22.

  The protruding cylindrical portion 22 has a lower end inserted into the upper resin sleeve, and can move up and down with respect to the accommodating cylindrical portion 21.

  Further, a lower resin sleeve (not shown) as a bearing member is attached to the outside of the lower end portion of the protruding cylindrical portion 22. As the case 11 moves up and down, the lower resin sleeve moves up and down together with the protruding cylindrical portion 22 and slides on the inner side surface of the accommodating cylindrical portion 21 to guide the vertical movement of the protruding cylindrical portion 22.

  Further, the upper end portion of the protruding cylindrical portion 22 is pivotally supported by the rotation shaft 23 so as to be rotatable relative to the rear end portion of the case 11.

  A mounting bracket 26 projects from the housing cylinder 21 toward the central axis. The mounting bracket 26 is connected to a lower end portion which is one end portion of a torsion coil spring 27 as urging means.

  The torsion coil spring 27 has an upper end fixed inside the protruding cylindrical portion 22. The torsion coil spring 27 is arranged linearly in the axial direction of the housing cylinder part 21 and the protruding cylinder part 22, and biases the case 11 upward, which is the extending direction, via the protruding cylinder part 22. is there. Further, as shown in FIGS. 1 and 2, the torsion coil spring 27 is integrally provided with a rotary latch 28 which is a fixing claw as a lock mechanism in the central region in the longitudinal direction. The rotary latch 28 protrudes in the radial direction of the torsion coil spring 27, and the tip is bent in a hook shape in the circumferential direction. Furthermore, a part of a lock lever 29 as a lever is inserted into the torsion coil spring 27. For this reason, the lock lever 29 is rotatable in the vicinity of the case 11 in the direction about the vertical direction, which is the movable direction of the case 11, that is, in the circumferential direction of the torsion coil spring 27 and in the horizontal direction.

  Here, the lock lever 29 is formed of a rigid member such as metal, for example, and has a columnar rotation shaft portion 31 inserted into the torsion coil spring 27, and a position closer to the lower side of the rotation shaft portion 31. An engagement protrusion 32 projecting radially from the rear, a rear protrusion 33 projecting rearward horizontally from the upper end of the rotating shaft 31, and projecting laterally from the tip of the rear protrusion 33 And a front projecting portion 35 projecting forward from the side projecting portion 34, and a handle portion 36 is provided at the front end portion of the front projecting portion 35.

  The rotating shaft portion 31 has an axial dimension shorter than the axial dimension of the torsion coil spring 27 and an outer diameter dimension smaller than the inner diameter dimension of the torsion coil spring 27. The rotating shaft portion 31 serves as a rotating shaft when the lock lever 29 is rotated.

  The engagement protrusion 32 engages with the rotary latch 28 of the torsion coil spring 27, and the rotation shaft 31 of the lock lever 29 rotates in the circumferential direction to rotate the torsion coil spring 27 while twisting in the circumferential direction. The type latch 28 is rotated.

  The rear protruding portion 33 is fitted in a not-shown elongated hole-shaped fitting hole provided in the axial direction of the protruding cylindrical portion 22 at the rear portion of the protruding cylindrical portion 22, and protrudes rearward of the protruding cylindrical portion 22. .

  The side protrusion 34 protrudes substantially horizontally from the tip of the rear protrusion 33 toward the side opposite to the seat 1.

  The front protrusion 35 is located on the side of the case 11 opposite to the seat 1.

  The handle part 36 is an operation part when the operator rotates the lock lever 29.

  In addition, the accommodating cylinder part 21 and the protruding cylinder part 22 are provided with engaging recesses 45 and 46, respectively, to which the rotary latch 28 can be engaged and disengaged. When the rotary latch 28 is engaged, these engaging recesses 45 and 46 fix the housing cylinder part 21 and the protruding cylinder part 22 to each other to fix the vertical position of the case 11 with respect to the seat 1, so that the rotary type When the latch 28 is in a non-engaged state, the case 11 is movable in the vertical direction with respect to the protruding cylinder part 22, that is, the seat 1 via the accommodation cylinder part 21.

  Next, the operation of the embodiment shown in FIGS. 1 to 3 will be described.

  When the operator grasps the lock lever 29 together with the case 11 and the armrest portion 12 and rotates the lock lever 29 in the horizontal direction so as to approach the case 11 as indicated by the imaginary line in FIG. With this rotation, the engagement protrusion 32 rotates around the central axis of the rotation shaft 31, and the rotary latch 28 rotates to disengage from the engagement recesses 45 and 46.

  At this time, the torsion coil spring 27 is twisted in the circumferential direction to store the elastic force in the rotational direction, and urges the lock lever 29 in a direction to return the rotation.

  In this state, the case 11 can move up and down, so if the operator loosens the external force that presses the case 11 as appropriate, the case 11 moves upward due to the upward biasing of the torsion coil spring 27, and the operator When the external force pressing the case 11 is increased against the bias of the torsion coil spring 27, the case 11 moves downward.

  Then, when the operator releases the lock lever 29 at a predetermined position, the engagement protrusion 32 of the lock lever 29 is rotated in the return direction by the rotary latch 28 of the torsion coil spring 27, thereby returning the lock lever 29. And the rotary latch 28 is engaged with predetermined engagement recesses 45 and 46, respectively, and the protruding cylinder portion 22 is fixed to the accommodating cylinder portion 21, so that the case 11 with respect to the seat 1 is fixed. Vertical movement is locked.

  As described above, in the embodiment shown in FIGS. 1 to 3, the torsion coil spring 27 that urges the case 11 in the upward direction rotates the lock lever 29 about the movable direction of the case 11. And the rotation of the case 11 with respect to the seat 1 by the engagement of the rotary latch 28 with the engaging recesses 45 and 46 is released, and the rotary latch 28 is urged in the return direction. A structure that also functions to fix the vertical position of the case 11 with respect to the seat 1 by engaging the rotary latch 28 with the engagement recesses 45 and 46 and to return the rotation of the lock lever 29 by rotating in the return direction. It was.

  That is, the torsion coil spring 27 assists or assists the vertical operation force of the case 11, and also assists the operation of fixing or locking the vertical position of the case 11, thereby providing different urging forces having respective functions. Compared with a configuration in which means are provided, the configuration can be simplified and the space can be saved.

  In addition, by using the torsion coil spring 27 as the urging means, the armrest device 6 can have a relatively simple configuration.

  By providing the lock lever 29 in the vicinity of the case 11 so as to be able to rotate in the horizontal direction, the case 11 of the armrest device 6 can be operated in the vertical direction while holding the lock lever 29 and the case 11, thereby improving operability. it can.

  Further, by projecting the front projecting portion 35 of the lock lever 29 forward from the rear portion of the case 11, the armrest device 6 can be operated with the elbow serving as a contact point when the operator pushes down the case 11 placed on the armrest portion 12. Therefore, operability is improved.

  By inserting the rotation shaft portion 31 of the lock lever 29 into the torsion coil spring 27, the configuration can be simplified and the space can be saved.

  By providing the rotary latch 28 integrally with a part of the torsion coil spring 27, it is not necessary to assemble the rotary latch to the torsion coil spring, for example, when the rotary latch is formed separately, and the assemblability is improved. While improving, it can suppress the increase in a number of parts.

  The upper resin sleeve is provided at the upper end portion of the accommodating cylinder portion 21, the lower end portion of the protruding cylinder portion 22 is inserted into the upper resin sleeve, and the lower resin sleeve is provided at the lower end portion of the protruding cylinder portion 22, thereby When 11 is moved in the vertical direction with respect to the sheet 1, these resin sleeves are brought into sliding contact with the outer side surface of the protruding cylindrical portion 22 and the inner side surface of the accommodating cylindrical portion 21 to guide the vertical movement of the protruding cylindrical portion 22. Therefore, the operability when the case 11 is pushed down can be improved.

  Next, another embodiment of the armrest device will be described with reference to FIG. In addition, about the structure and effect | action similar to embodiment shown by the said FIG. 1 thru | or FIG. 3, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the embodiment shown in FIG. 4, the torsion coil spring 27 is inserted and fixed to a rotary latch 51 as a locking claw as a lock mechanism formed separately from the torsion coil spring 27, and the lock lever 29 The rotating shaft portion 31 is integrally fitted to the rotary latch 51.

  The rotary latch 51 rotates integrally with the rotation of the lock lever 29, and has a substantially cylindrical latch body 53 provided with an insertion hole 52 through which the torsion coil spring 27 is inserted. And an engaging portion 54 protruding from the latch main body 53.

  The insertion hole 52 is provided through the vicinity of the central axis of the latch body 53 in the axial direction.

  The engaging portion 54 is continuous over the entire vertical direction of the latch body 53 and protrudes in the radial direction of the latch body 53. Further, the engaging portion 54 is bent in a hook shape in the rotation direction of the rotary latch 51, and the engagement recesses 45 and 46 are rotated by the rotation of the rotary latch 51 accompanying the rotation of the lock lever 29. Can be disengaged.

  In the embodiment shown in FIG. 4, as in the embodiment shown in FIGS. 1 to 3, the torsion coil spring 27 that urges the case 11 upward is provided on the lock lever 29. The rotation of the case 11 with respect to the engagement recesses 45 and 46 of the rotary latch 51 is released and the vertical position of the case 11 with respect to the seat 1 is released, and the rotary latch 51 is biased in the return direction. The function of returning the rotation of the lock lever 29 while fixing the vertical position of the case 11 with respect to the seat 1 by engaging the rotary latch 51 with the engagement recesses 45 and 46 by the rotation in the return direction. By also serving, the same operational effects as the embodiment shown in FIGS. 1 to 3 can be obtained.

  Further, by forming the rotary latch 51 separately from the torsion coil spring 27 and fitting it integrally with the torsion coil spring 27, for example, compared with the case where the rotary latch is provided integrally with the torsion coil spring, The rotary latch 51 can be easily formed.

  In the embodiment shown in FIG. 4, the configuration in which separate torsion coil springs 27 are provided above and below the insertion hole 52 of the rotary latch 51 as shown in FIG. The same effects as those of the illustrated embodiment can be achieved.

  In each of the above embodiments, it is possible to use a biasing means other than the torsion coil spring 27.

  Further, the shape of the rotary latches 28 and 51 or the shape of the engagement recesses 45 and 46 is not limited to the above configuration.

  The lock lever 29 can be configured to rotate in the horizontal direction as long as the lock lever 29 rotates in a direction having at least a rotation direction component having the movable direction of the case 11 as an axial direction.

It is a perspective view which cuts off one part and shows one Embodiment of the armrest apparatus which concerns on this invention. It is a disassembled perspective view which shows a part of armrest apparatus same as the above. It is a side view which shows the sheet | seat provided with the armrest apparatus same as the above. It is a disassembled perspective view which shows a part of other embodiment of an armrest apparatus same as the above. It is a disassembled perspective view which shows a part of other embodiment of an armrest apparatus same as the above.

Explanation of symbols

1 seat 6 armrest device
11 Case as body
27 Torsion coil spring as biasing means
28, 51 Rotating latch that is a fixed claw as a locking mechanism
29 Lock lever as lever

Claims (5)

An armrest device provided corresponding to the seat,
A main body movably provided in the vertical direction with respect to the seat;
A lever provided on the main body so as to be rotatable about the movable direction of the main body;
A lock mechanism capable of fixing the vertical position of the main body relative to the seat;
The main body is urged upward, and at least a part of the main body is rotated as the lever is rotated to release the fixing of the vertical position of the main body relative to the seat by the lock mechanism and the lock mechanism is urged in the return direction. And an urging means for fixing the vertical position of the main body with respect to the seat by the lock mechanism and returning the rotation of the lever by rotating in the return direction. The armrest device according to claim 1, wherein the lever is provided so as to be rotatable in the horizontal direction in the vicinity of the main body. The biasing means is a torsion coil spring,
The armrest device according to claim 1 or 2, wherein a part of the lever is inserted into a torsion coil spring. The armrest device according to claim 3, wherein the lock mechanism is a fixed claw provided integrally with the torsion coil spring in a part of the torsion coil spring. The armrest device according to claim 3, wherein the lock mechanism is a fixed claw that is formed separately from the torsion coil spring and is integrally fitted to the torsion coil spring.

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