JP2005248580A - Positioning device for console box for construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide such a structure as to enable the continuous adjustment of the height of a console box, and as to easily return a console box to a height position adjusted before movement to a getting-on-and-off attitude position, even if the console box is returned to a working attitude position in the performance of an operation from the getting-on-and-off attitude position when an operator gets on and off a construction machine. <P>SOLUTION: In this positioning device for the console box for the construction machine, a lever member 24 , which can make a telescopic motion and which makes the amount of the telescopic motion continuously adjustable, is provided between the console box 18 and a fixed frame 21, so that the rotational leading end-side height position of the console box 18 can be adjusted by the telescopic motion of the lever member 24. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a positioning device for a console box for a construction machine such as a hydraulic excavator, and in particular, can be switched from a working posture position to a boarding posture position during operation, and the working posture position. It is related with the positioning device of the console box for construction machines which can adjust height position by.

  In general, some construction machines are configured such that a console operation lever is provided in a console box and the operation of the operation actuator is controlled by operation of the operation lever. In this type of construction machine, the console box may protrude and obstruct the operator.

  Therefore, in some construction machines, when the operator gets on and off the driver's seat, the operator jumps up from the working position when driving to the upper boarding position and removes the working control lever from the boarding passage section. A console box configured to secure a passage for getting on and off an operator is known (for example, see Patent Document 1).

Further, the posture of the console box arranged at the working posture position is also slightly different depending on the body shape of the operator who performs the operation. Therefore, it is also known that the height of the console box can be adjusted at a plurality of positions in the vertical direction at the working posture position, and the height position of the console box can be adjusted according to the preference of the operator. (See Patent Document 2).
JP-A-9-13425. Japanese Utility Model Publication No. 6-76458.

  The invention described in Patent Document 1 is a structure in which the console box is lifted from the working posture position to the upper boarding / alighting posture position and removed from the boarding / alighting passage portion to secure an operator's boarding / alighting passage. There is no structure that can adjust the position of the height posture according to the preference of the operator.

  On the other hand, the invention described in Patent Document 2 has a structure in which the position of the height posture of the console box can be adjusted according to the preference of the operator, but there are a plurality of places where the console box can be switched in advance. Switching can be performed only at that point. In addition, when the console box is raised to the boarding position, the console box is not automatically returned to the same position as before when the console box is returned to the working position. For this reason, in general, it is often returned to the upper adjustment location, but it is not known where the adjustment location is returned each time. Therefore, a method is adopted in which the operator actually grasps the operation lever with his / her hand in the state returned to the working posture position, and again finds and adjusts the portion that suits his / her preference. As a result, there is a problem that it takes time to obtain a working posture position corresponding to the operator.

  Therefore, the height of the console box can be adjusted continuously, and even before returning to the working posture position when driving from the getting on / off posture position when getting on and off, before moving to the riding posture position Therefore, a technical problem to be solved in order to be able to easily return to the adjusted height position arises, and the present invention aims to solve this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is provided with a working operation lever on the distal end side of the console box, and the proximal end side of the console box is pivoted on the fixed frame. In the construction machine that is mounted so as to be swingable up and down via, a lever member is provided between the console box and the fixed frame that can be expanded and contracted and the amount of expansion and contraction can be adjusted steplessly. A positioning device for a construction machine console box characterized in that the height position of the console box on the rotating front end side is adjusted by extending and contracting.

  According to this configuration, by adjusting the length of the lever member steplessly, the distance between the mounting portion of the lever member and the fixed frame is changed, and the front end side of the console box swings up or down. The height position is adjusted.

  According to a second aspect of the present invention, the lever member includes a rotatable rotating member, and an advance / retreat member that is screw-coupled to the rotating member and is advanced and retracted from the rotating member by being screwed by the rotation of the rotating member. And a console box positioning device for a construction machine, wherein the expansion / contraction amount is adjusted by the advance / retreat of the advance / retreat member.

  According to this configuration, when the rotating member is rotated, the advance / retreat member is screwed to advance or retract from the rotation member, and by this advancement / retraction, the protrusion length of the advance / retreat member and the amount of expansion / contraction of the lever member are increased. Adjusted.

  According to a third aspect of the present invention, an engaging portion is provided on the fixed frame so that one end of the lever member is detachably connected, and the engagement between the one end of the lever member and the fixed frame is released. A positioning device for a console box for a construction machine is provided, in which the console box can be flipped up from a working position to a boarding position.

  According to this configuration, by disengaging the engaging portion provided on the fixed frame and one end of the lever member, the console box can be raised to the position for getting on and off, and the lever member can be used as the raising lever. Operate.

According to a fourth aspect of the present invention, the lever member is provided with a locked portion that is engageable / detachable with the engaging portion at one end thereof, and the locked portion is engaged with the engaging portion. The console box can be rotated between a lock position for locking the console box at the work posture position and an unlock position for releasing the lock on the work posture position of the console box when the engagement portion is released. Is attached to the console box, and is formed such that the length between the attachment position to the console box and the locked portion can be adjusted steplessly, and the console box is further moved to the working posture position. A positioning device for a console box for a construction machine provided with urging means for urging up to the above-mentioned boarding / exiting position.
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  According to this configuration, the console box is locked at the working posture position by engaging the engaged portion provided on one end side of the lever member with the engaging portion provided on the fixed frame. When the lever member is rotated to disengage the locked portion from the engaging portion of the fixed frame, the engagement with the engaging portion is released and the console box is unlocked. The lever member is pivotable between the locked position and the unlocked position. When the lever member is rotated to the unlocked position, the console box is automatically flipped up toward the boarding / alighting biasing position by the biasing force of the biasing means.

  According to a fifth aspect of the present invention, the lever member is always urged to rotate to the fixed frame side with the one end side centered on the mounting position to the console box, and the console box is used for getting on and off the fixed frame. A positioning device for a console box for a construction machine, provided with a guide cam that guides a locked portion of the lever member with respect to the engaging portion when rotating from the posture position to the working posture position.

  According to this configuration, when the console box rotates from the getting-on / off posture position to the working posture position, one end side of the lever member is urged toward the fixed frame side and comes into contact with the guide cam. Then, the locked portion provided on the one end side is guided by the guide cam and moves to the engaging portion, the lever member is urged to rotate to the fixed frame side, and the locked portion becomes the engaging portion. The console box is locked in the working posture position.

  According to the first aspect of the present invention, the height position of the console box is continuously adjusted steplessly by adjusting the expansion and contraction of the lever member. Therefore, the console box is adjusted to the optimum height according to the physique of the operator. Positioning can be performed, and comfort in the cab can be improved.

  Since the length of the whole lever member, that is, the amount of expansion / contraction changes and the height of the console box can be adjusted by simply rotating the rotating member, the invention according to claim 2 can adjust the height of the console box. The height of the console box can be adjusted easily, and it can contribute to the improvement of operability.

  According to the third aspect of the present invention, the height of the console box can be adjusted and the console box can be locked up and unlocked with a single lever member. The number of parts of the apparatus can be reduced, which can contribute to space saving and cost reduction.

  In the invention according to claim 4, since the lever member is attached so as to be rotatable between the lock position and the non-lock position of the console box, in addition to the effects of the invention according to claim 1, 2 or 3, Without changing the length of the member, the console box can be locked and unlocked very simply by rotating the lever member. Also, even if the console box moves between the working posture position and the boarding posture position, the length of the lever member does not change, so when the console box is returned from the boarding posture position to the working posture position, It automatically returns to the adjusted height position, and a working posture position corresponding to the operator can be obtained in a very short time. Further, when the lever member is rotated to the unlocked position, the console box is automatically flipped up toward the urging position for getting on and off by the urging force of the urging means, which can contribute to improving the operability of the operator. .

  According to the fifth aspect of the present invention, when the console box is rotated from the boarding / exiting position to the working position, the locked member provided on one end side of the lever member is guided by the guide cam and automatically engaged with the engaging portion. In addition to the effects of the invention according to claim 1, 2, 3 or 4, the console box is automatically locked at the work posture position without any manual operation by the operator, and the operability is further improved. It can contribute to improvement.

  The height of the console box can be adjusted continuously, and even when the riding position is changed from the riding position when getting on and off to the working position when driving, the working position is changed from the working position to the getting on and off position. In order to be able to return to the height position adjusted before moving, a lever member is provided between the console box and the fixed frame that can be expanded and contracted and the amount of expansion and contraction can be adjusted steplessly. The height of the console box on the rotating tip side is adjusted by the amount of expansion and contraction of the lever member.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a hydraulic excavator as a construction machine to which the present invention is applied. In the hydraulic excavator 10, an upper swing body 13 is rotatably mounted on a lower traveling body 11 via a swing mechanism 12. The upper swing body 13 is provided with a cab 14 on one front side thereof, and a boom 15 is attached to the front center portion so as to be able to be raised and lowered. An arm 16 is attached to the tip of the boom 15 so as to be swingable up and down, and a bucket 17 is attached to the tip of the arm 16.

  FIG. 2 shows a schematic configuration inside the cab 14. Console boxes 18 are disposed on the left and right sides of the cab 14. A work control lever 19 for operating various work hydraulic actuators (not shown) for operating the upper swing body 13, the boom 15, the arm 16, and the bucket 17 is provided at the upper front portion of the console box 18. ing.

  3 to 6 show a schematic configuration around the console box 18. The rear portion of the console box 18 is pivotally supported by a fixed frame 21 attached to the vehicle body 20 via a pivot 22 so as to be swingable in the vertical direction. As a result, the console box 18 swings in the vertical direction on the front side, so that the operator sitting on the driver's seat 23 (see FIG. 2) takes a substantially horizontal working posture in which the operator can easily hold the working operation lever 19. Position (position indicated by a solid line in FIG. 3), and the front side moves up and jumps up, and when the operator gets on and off the driver's seat 23, the working operation lever 19 takes an attitude that does not get in the way (see FIG. 3 can be changed over to a position indicated by a two-dot chain line in FIG.

  A coil spring 40 is disposed between the console box 18 and the fixed frame 21 as urging means for urging and urging the console box 18 to the getting-on / off posture position.

  A lever member 24 is provided between the console box 18 and the fixed frame 21. As shown in FIGS. 4 to 6, the detailed structure of the lever member 24 includes a rotating member 24a, an advance / retreat member 24b, and a knob 24c.

  The rotating member 24a is a round bar-like member having the knob 24c at the upper part of the rotating member 24a, and a screw hole 26 (see FIG. 6) opened at the lower end side toward the upper side. In addition, a circumferential groove 27 for attaching a mounting bracket 31 to be described later is formed in the upper part of the outer periphery of the rotating member 24a.

  The advance / retreat member 24b is a round bar member, and a thread 41 (see FIG. 6) that can be screwed into the screw hole 26 of the rotation member 24a is formed on the outer periphery of the advance / retreat member 24b. By screwing the thread 41 of the retracting member 24b into the screw hole 26 of the rotating member 24a, the advancing / retracting member 24b is attached so as to protrude from the lower end side of the rotating member 24a. Further, a lock pin 28 as a locked portion is integrally formed at the lower end portion of the advance / retreat member 24b in a state orthogonal to the axial direction of the advance / retreat member 24b.

  The mounting bracket 31 is integrally formed with an annular portion 31a formed by bending an elastic plate material into an annular shape and an attachment portion 31b formed by extending the joint portions at both ends of the annular portion 31a outward. Has been. The rotating member 24a is pushed into the annular portion 31a of the mounting bracket 31 in a state where the mounting portion 31b (the matching portion on both ends) of the mounting bracket 31 is expanded, and the annular portion 31a of the mounting bracket 31 is further pushed. The mounting bracket 31 is mounted to be rotatable with respect to the rotating member 24a by dropping it into the circumferential groove 27 of the rotating member 24a. In addition, a mounting hole 32 for inserting a mounting screw 29 is formed in the mounting portion 31b of the mounting bracket 31 so as to penetrate both the mounting portions 31b. An engagement pin 33 for attaching the spring 34 is provided below the attachment hole 32.

  An engaging portion 35 is cut out in the fixed frame 21 corresponding to the lock pin 28 of the lever member 24, and a guide cam 36 is formed continuously upward from the engaging portion 35. Yes.

  A procedure for attaching the lever member 24 thus formed to the console box 18 will be described next. First, in a state where the advance / retreat member 24b and the mounting bracket 31 are mounted on the rotating member 24a, a mounting screw 29 is mounted in the mounting hole 32 of the mounting bracket 31, and a spacer is provided between the mounting bracket 31 and the console box 18. The attachment screw 29 is attached to the console box 18 with the intermediate member 30 interposed therebetween, and the lever member 24 is held with respect to the console box 18 so as to be swingable up and down.

  Next, a tension coil spring 34 as an urging means is mounted between the engagement pin 37 provided on the side surface of the console box 18 and the engagement pin 33 on the mounting bracket 31. As a result, the lever member 24 is always urged in the direction in which the lock pin 28 abuts with the guide cam 36 of the fixed frame 21.

  The lever member 24 mounted in this manner allows the rotating member 24a to freely rotate with respect to the mounting bracket 31, while the advance / retreat member 24b has one end of the lock pin 28 close to the console box 18. Therefore, the rotation is restricted and the rotation member 24a can move only in the forward / backward direction (the axial direction of the rotation member 24a).

  Next, a method for positioning the console box 18 using the lever member 24 configured as described above will be described. In this structure, when the console box 18 is disposed at the working posture position, the lock pin 28 of the lever member 24 is engaged with the engaging portion 35 of the fixed frame 21 so that the console box 18 is brought into the working posture position. Holding in a locked state.

  When the knob portion 24c of the lever member 24 is rotated in this state, the rotating member 24a rotates in the same direction integrally with the knob 24c, and the screw hole 26 of the rotating member 24a and the thread of the advance / retreat member 24b are rotated. The advance / retreat member 24b is screw-fed to the rotation member 24a by the screw connection with 41. Accordingly, the advance / retreat member 24b advances to the outside of the rotation member 24a according to the rotation direction of the rotation member 24a, or the advance / retreat member 24b retracts to the inside of the rotation member 24a. The entire length of 24 is adjusted for expansion and contraction.

  Here, the position of the lock pin 28 does not change because the lock pin 28 is engaged with the engagement portion 35 of the fixed frame 21. As the lever member 24 expands and contracts, the console box 18 moves up or down with the pivot 22 as a fulcrum. The height position of the console box 18 provided with the work operation lever 19 on the tip end side of the console box is continuously changed. That is, the position indicated by the solid line in FIG. 3 indicates a state in which the console box 18 is moved to the lowest side by the operation of the lever member 24 in the working posture position, and the position indicated by the alternate long and short dash line in FIG. Indicates the state of moving to the uppermost side. Therefore, by rotating the knob portion 24c, the height position of the console box 18 between the position indicated by the solid line and the position indicated by the alternate long and short dash line is arbitrarily adjusted to a position where the operator can easily operate. Can be held.

  Next, when the operator gets on and off, when the lever member 24 is rotated in the direction of arrow U in FIG. 3 against the urging force of the coil spring 34, the lock pin 28 is disengaged from the engaging portion 35. At the same time, the console box 18 starts rotating toward the boarding / exiting position by the urging force of the coil spring 40, and moves until the console box 18 abuts against the stopper 42 and is regulated. As a result, when the operator gets on and off the driver's seat 23, the operation lever 19 is not in the way.

  Further, after the console box 18 starts to rotate toward the boarding / exiting posture position, when the lever member 24 is released, the lock pin 28 moves in a state of sliding on the guide cam 36.

  When the operator gets on and off the console box 18 and pushes down the console box 18 toward the working posture position, the lock pin 28 moves along with the console box 18 while sliding on the guide cam portion 36, and is returned to the working posture position to be locked. When 28 corresponds to the engaging portion 35, the lock pin 28 engages in the engaging portion 35, and the console box 18 is locked again at that position. Therefore, even if the console box 18 moves between the working posture position and the getting-on / off posture position, the length of the lever member 24 does not change. Therefore, in the state where the console box 18 has returned to the working posture position, Box 18 returns to its original height.

  Therefore, in the structure of this embodiment, when the console box 18 is rotated from the getting-on / off position to the working position, the lock pin 28 is guided by the guide cam 36 and is always engaged with the engaging portion 35. Since it returns to the same height position, it is not necessary to adjust the height each time. Further, when the operator wants to change the position to his own position, the height position of the console box 18 can be adjusted steplessly by rotating the rotating member 24a. Can be obtained.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The figure shows an embodiment of the present invention.
1 is an overall side view of a hydraulic excavator to which the present invention is applied. The perspective view which shows schematic structure in the cab in a hydraulic shovel. The schematic block diagram around the console box in a cab. The perspective view which shows the lever member periphery structure attached to the console box. The side view of the lever member periphery structure attached to the console box. FIG. 6 is a cross-sectional view taken along line AA in FIG. 5.

Explanation of symbols

18 console box 19 operation lever 20 vehicle body 21 fixed frame 22 pivot 23 driver's seat 24 lever member 24a rotating member 24b advance / retreat member 26 screw hole 28 lock pin (locked portion)
31 Mounting bracket 34 Spring 35 Engagement portion 36 Guide cam 37 Engagement pin 40 Coil spring 41 Thread 42 Stopper

Claims (5)

In a construction machine in which an operation lever is provided on the distal end side of the console box, and the proximal end side of the console box is attached to a fixed frame so as to be swingable up and down via a pivot.
Provided between the console box and the fixed frame is a lever member that can be expanded and contracted, and the amount of expansion and contraction can be adjusted steplessly. An apparatus for positioning a console box for a construction machine, characterized by being adjusted.   The lever member includes a rotatable rotating member, and an advancing / retreating member that is screw-coupled to the rotating member and is screwed by the rotation of the rotating member to advance or retract from the rotating member. 2. The positioning device for a console box for a construction machine according to claim 1, wherein the expansion / contraction amount is adjusted by advancing and retracting.   An engagement portion is provided on the fixed frame so that one end of the lever member is detachably connected, and the engagement between the one end of the lever member and the fixed frame is disengaged, so that the console box is in a working posture. The positioning device for a console box for a construction machine according to claim 1 or 2, wherein the position can be lifted up from a position to a position for getting on and off. The lever member is provided with a locked portion that is engageable / detachable with the engaging portion on one end side thereof, and the locked portion is engaged with the engaging portion so that the console box is in the working posture. The console box is attached to the console box so as to be rotatable to a lock position that locks to a position and an unlocked position that releases the lock of the console box with respect to the working posture position by releasing the engagement with the engagement portion. The length between the mounting position to the console box and the locked portion can be adjusted steplessly,
4. The positioning device for a console box for a construction machine according to claim 1, further comprising urging means for urging the console box to jump up from the working posture position to the getting-on / off posture position. The one end side of the lever member is always urged to rotate to the fixed frame side around the mounting position to the console box,
The fixed frame is provided with a guide cam for guiding the locked portion of the lever member with respect to the engaging portion when the console box rotates from the getting-on / off posture position to the working posture position. 5. A positioning device for a console box for a construction machine according to claim 1, 2, 3, or 4.

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