JP3985762B2 - Construction machine control device - Google Patents

Description

  The present invention relates to a control device for a construction machine such as a hydraulic excavator or a crane, and more particularly to its entry / exit blocking mechanism.

  In general hydraulic excavators, a control box is arranged on the side of the driver's seat, and the driver operates by operating the operation lever standing on the control box while the engine is operating. Work is to be done.

  Here, there are times when the driver wants to get off the vehicle with the engine running, but even if the driver accidentally touches the work control lever on the control box, the hydraulic excavator will move. It is preferable from the viewpoint of safety. For this reason, a boarding / alighting lever that prevents the driver from inadvertently getting off is provided, and the raising / lowering operation of the boarding / alighting lever (the boarding / alighting lever is greatly protruded forward from the driver's seat to prevent the driver from getting off). In order to allow the driver to get off, a substantially right angle is required.) The above-mentioned operation lever is moved backward by a predetermined angle together with the control box. Since the amount of forward protrusion of the driver's seat is small, it may be tilted by an angle smaller than the above-mentioned undulation angle in order to disable the operation of the operation lever and allow the driver to get off. . Therefore, a mechanism simply connecting the control box and the boarding / alighting cutoff lever cannot satisfy the relationship between the tilt angle of the control box and the undulation angle of the boarding / alighting cutoff lever. Is adopted.

  FIG. 5 is a side view showing an example of a conventional hydraulic excavator maneuvering device, where the solid line in the figure indicates the locked position during operation of the control box, and the two-dot chain line indicates the state of the rearward flip-up when getting off the vehicle. Yes.

In the above-mentioned Patent Document 1, as shown in FIG. 5, the axial center of the support plate 1515 erected on the seat stand of the driver's seat (not shown) is set in the left-right direction at a position inside the control box 1510 provided with the operation lever 1511. The guide pin 1514 is fixed, the guide plate 1516 is formed with a guide groove hole 1517 in a side view, the guide pin 1514 is engaged with the guide groove hole 1517 of the guide plate 1516, and the control box 1510 is engaged. A locking hook 1520 and a bracket 1521 are fixedly fixed to a base end boss 1519 for a flip-up lever 1512 provided inside the front side of the front side, and a link 1522 is connected between the bracket 1521 and one end of the guide plate 1516. Are connected through. When the engagement of the locking hook 1520 with the lock pin 1523 is released and the flip-up lever 1512 is flipped up, the control box 1510 is rotated upward by the spring force of the mainspring spring 1513 wound around the horizontal axis. Begin. In this case, the link 1522 and the guide plate 1516 rotate in the front-rear direction with respect to the rotation of the proximal end boss 1519 of the flip-up lever 1512. At that time, the guide plate 1516 guides along the guide pin 1514. The slot 1517 slides so that the guide plate 1516 and the link 1522 rotate. Then, the flip-up lever 1512 is set as a boarding / alighting blocking lever that prevents the driver from getting off when the control box 1510 is in the locked state during operation.
JP-A-9-209405

  As described above, the entrance / exit blocking lever protrudes greatly forward from the driver's seat to prevent the driver from getting off, and a substantially vertical undulation angle is required to allow the driver to get off. On the other hand, the control box has a smaller amount of protrusion to the front of the driver's seat than the entrance / exit blocking lever. Therefore, in order to disable the operation of the operation lever and to allow the driver to get off, the control box is more A small tilt angle is sufficient. In order to satisfy the relationship between the tilt angle of the control box and the undulation angle of the entrance / exit blocking lever, the technique described in Patent Document 1 includes a bracket 1521 and a link 1522 in a cam mechanism including a guide plate 1525 and a guide pin 1514. This is a complicated structure combining a link mechanism provided with a large number of parts, and the number of parts is large, so that the production cost is high. Further, since there is a link mechanism in addition to the cam mechanism, it becomes longer in the front-rear direction and it is difficult to make it compact. Further, in the cam mechanism, the guide pin 1514 slides directly in the guide groove 1517 which is a cam groove, and a large force is applied to the guide pin 1514 when the flip-up lever is operated. There is also a problem that the durability of is low.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a construction machine control device that is an inexpensive mechanism, has short dimensions in the front-rear direction, and is excellent in durability. .

According to the construction machine control device of the present invention, as described in claim 1, the control box provided with the operation lever for work is disposed on the side of the seat stand of the driver's seat, and is positioned at the front portion of the control box. A second turning fulcrum on the seat stand located on the side of the rear of the control box is arranged in conjunction with the operation of the getting-on / off blocking lever. in steering apparatus for a construction machine is configured to rotate flipped to get off at the flip-up position behind than when working locking position around a, fixed to the elevating breaking lever, said first pivot point a moving member for multiplication descending blocking lever and rotated integrally around a provided between the control box and the seat stand, the control box And a pressing member that pushes up the control box so as to add a jumping force for the flip-up rotation, and the seat stand has a control box rotation support shaft that is an axis of the second rotation fulcrum When, the support shafts for supporting the movable member is provided from the second pivot point at a position away forward, the moving member has a groove in which the support shaft is fitted slidably and, the groove portion is in a state where the control box is at locking position the work, and a shape before and after drops through the bending point, edge portions before the groove portion of the control box It is set at an angle to block a second flip-up rotation of the getting-off time of the flip-up position behind than when working locking position around a pivot point, the pressing member, the support shaft is the The said control box rear upper surface of the moving member to the sheet stand by pushing up the control box so as to abut from below the control box pivoting axles with fitted state prior edge portion of the part The moving member is locked at the locking position during operation , and the moving member moves in a direction in which the rear part of the moving member is separated from the control box rotating support shaft as the getting-off / cut-off lever rotates from the lying posture to the standing posture. By rotating about the first rotation fulcrum , the support shaft is moved from the front lowering portion to the rear lowering portion of the groove portion to release the locking state, and the control box together with the getting-on / off blocking lever It is comprised so that it may move in the direction which jumps up.

As in the invention described in claim 2, the shape of the rearwardly descending portion of the groove portion is such that the boarding / leaking-off lever rotates relative to the control box in the direction of further rising as the control box is flipped up. It is preferable that it is set.

Further, as in the third aspect of the present invention, a tensile member that applies a predetermined tensile force between a position eccentric from the first rotation fulcrum in the center direction of the moving member and the front side of the control box Is preferably provided.

Further, as in the invention described in claim 4, it is preferable that the support shaft has a roller rotatable around the support shaft, and this roller is fitted in the groove portion of the moving member.

  According to the first aspect of the present invention, when the getting-on / off blocking lever is in the lying posture, the moving member is locked to the seat stand, and the control box is prevented from being flipped up, while the getting-on / off blocking lever is When the vehicle is changed from the lying posture to the standing posture, the moving member is rotated about the first rotation fulcrum to release the above-mentioned locked state and is moved in the direction in which the control box jumps up together with the getting-on / off blocking lever. Therefore, the configuration is simple, and the number of parts can be reduced, resulting in a reduction in manufacturing cost. In addition, since the cam mechanism and the link mechanism are not provided separately, the cam mechanism and the link mechanism are shortened in the front-rear direction, and the size reduction is achieved.

Further , the locking position of the rear part of the movable member in the locking of the control box to the seat stand is set to the control box rotating support shaft on the seat stand which is the axis of the second rotating fulcrum. Since the upper surface of the rear part of the moving member is brought into contact with the control box rotation support shaft from below, the moving member can be locked to or released from the seat stand with a very simple configuration.

Further, the pressing member provided between the control box and the sheet stand, by pushing up the control box in the flip-up direction, than you added bounce force of the control box, the moving member is a second When the control box is suspended between the rotation fulcrum and the support shaft and locked to the seat stand, the control box is reliably prevented from jumping up, while the moving member is the first rotation fulcrum. The control box is surely jumped up by the jumping force applied by the pressing member when it is deviated from the second pivot point by pivoting around the center.

According to a second aspect of the present invention, the shape of the rearwardly descending portion of the groove portion is such that the boarding / leaking-off blocking lever rotates relative to the control box in the direction of further rising as the control box is flipped up. Since it is set, the undulation angle of the entrance / exit blocking lever can be made larger than the tilt angle of the control box with a very simple configuration.

According to invention of Claim 3 , the tension member which adds predetermined | prescribed tensile force between the position eccentric to the center direction of the moving member from the 1st rotation fulcrum and the front side of a control box is provided. Therefore, when the moving member is suspended and locked between the second rotation fulcrum and the support shaft, the jumping-off blocking lever is reliably prevented from jumping up, while the moving member is However, when it deviates from the second rotation fulcrum by rotating about the first rotation fulcrum, it gets on and off by the pulling force further applied by the tension member in addition to the jumping force added by the pressing member. The shut-off lever is flipped up reliably. In this case, the tensile force applied by the tension member is applied to the first rotation fulcrum, and the jumping force applied to the support shaft is reduced accordingly, so that the wear around the support shaft is reduced and the durability of that portion is reduced. Improves.

According to the fourth aspect of the present invention, the support shaft has a roller that is rotatable around the support shaft, and this roller is fitted into the groove portion of the moving member, so that the moving member moves smoothly. Thus, the wear of the groove and the support shaft is reduced, and the durability is improved.

  FIG. 1 is a perspective view showing an external configuration of a hydraulic shovel control device according to an embodiment of the present invention, FIG. 2 is a diagram showing details of main components, (a) is a left side view of a frame, (B) is a left side view of the cam plate with the entrance / exit blocking lever, and (c) is a left side view of the support plate.

  As shown in FIG. 1, a control device for a hydraulic excavator as a construction machine has a control box 1 having a work operation lever 2 disposed on a side of a driver's seat (not shown), and a seat stand 10 in the driver's seat. The first support fulcrum (533 in FIG. 2A and 601 in FIG. 2B) is supported by a support plate 3 as an extended auxiliary member and located at the front portion of the control box 1. As shown in FIG. 2, a second pivot point on the support plate 3 (see FIG. 2) is arranged. It is configured so that it is flipped up from the locking position at the time of operation to the rearward position when it gets off the vehicle, centering on 521, 531 in (a) and 301) in (c). The work operation lever 2 is for operating a remote control valve (not shown), and the boarding / alighting blocking lever 4 is for preventing the driver from getting out of the vehicle.

  The control box 1 includes a frame body 5 and a cam plate (moving member) 6 that are covered with left and right covers 11 and 12 that form an inverted triangle when viewed from the side.

  As shown in FIG. 2A, the frame 5 is provided with a mounting seat 51 for the operation control lever 2 on the front side and a pair of left and right brackets 52 and 53 extending on the rear side. ing. The installation seat 51 has a square with its ceiling surface 511 greatly cut out at the center, and is provided with bolt holes 512 for installation of the operation control lever 2 at its four corners, and both the left and right sides and the rear side are downward. The surfaces 513, 514, and 515 are formed at right angles to each other, and the surface 514 is further bent toward the front side in the drawing to form a surface 516. A protrusion 517 protrudes toward the front side in the drawing at the rear lower portion of the surface 514. The protrusion 517 is for locking the upper end of a coil spring 801 (see FIG. 3) as a tension member.

  The left bracket 52 has an arcuate shape in a side view, and the right bracket 53 has a trapezoidal shape in a side view, and both are welded to the rear surface 515 of the mounting seat 51. Shaft holes 521 and 531 which are the rotation centers of the frame 5 are formed in the rear lower portions of the brackets 52 and 53 so as to overlap each other in a side view. The brackets 52 and 53 are parallel to each other by sleeves 541 and 542 interposed between the front upper portion and the rear upper portion, respectively.

  Further, a limit switch 523 is attached to the lower center of the left bracket 52. A protrusion 532 protrudes toward the front side in the drawing at the upper center of the right bracket 53, and a shaft hole 533 is formed at the lower front part thereof. The protrusion 532 is for locking the upper end of a gas spring 802 (see FIG. 3) as a pressing member.

  As shown in FIG. 2 (b), the cam plate 6 is formed in a long square extending in the front-rear direction, and the rear end of the boarding / alight-blocking lever 4 is fixed to the front part, and the cam plate 6 extends in the longitudinal direction. A letter-shaped cam groove (groove portion) 61 is formed. Further, a projection 601 extending toward the front in the figure is formed on the front upper part. When the projection 601 passes through the shaft hole 533 and is mounted at a predetermined position, as shown in FIG. 2A, the projection 522 is attached with a long member 602 having a C shape in a side view. It is done. A contact of the limit switch 523 can come into contact with the upper surface of the long member 602, and a protrusion 603 protrudes further toward the front side in the figure from the lower surface. The protrusion 603 is for locking the lower end of the coil spring 801.

  The entrance / exit blocking lever 4 is formed by bending a round bar or pipe. In FIG. 2 (b), the entrance / exit blocking lever 4 extends downward from the front portion of the cam plate 6 and then bends forward and then further bent toward the front. Thus, the grip portion 41 has a three-dimensional shape that rises forward after being extended, and is secured to the tip of the grip portion 41 for the driver to grip.

  As shown in FIG. 2 (c), the support plate 3 has a shape in which the bottom of the triangular plate is offset to the back side in the figure, a shaft hole 301 is formed at the apex, and a shaft is formed at the front inclined portion. A hole 302 is formed. Further, a protrusion 303 protrudes to the near side in the figure at the center portion immediately above the offset. The protrusion 303 is for locking the lower end of the gas spring 802. Further, shaft holes 304, 305, and 306 are formed in the lower portion (three places) of the offset, respectively. These shaft holes 304, 305, and 306 are for fixing the support plate 3 to the seat stand 10 with bolts. In addition, a protrusion 307 serving as a receiving part of the frame body 5 is provided at the foremost part of the support plate 3, and this protrusion 307 is brought into contact with a folded surface 516 at the lower front side of the frame body 5. The rotational movement of the is regulated. The offset portion is appropriately reinforced with brackets 308, 309, etc. so as not to be deformed.

  Next, a method for assembling these components will be described. 3A and 3B are diagrams showing the entire assembled state, in which FIG. 3A is a left side view, FIG. 3B is a plan view, and FIG. 3C is a front view. Note that the solid line in FIG. 1A indicates the locking posture during operation when the boarding / closing blocking lever 4 is laid down, and the two-dot chain line indicates the jumping posture when getting off when the boarding / closing blocking lever 4 is mainly raised. Show.

  As shown in FIGS. 3 (a) to 3 (c), the frame 5 of the control box 1 overlaps the brackets 52, 53 of the frame 5 with the support plate 3, and between the shaft holes 301, 521, 532. A horizontal shaft (control box rotating support shaft) 702 is inserted in a state where the sleeve 701 is interposed therebetween. At this time, if the right end of the horizontal shaft 702 protrudes from the right bracket 53 to the rear side in the drawing (a) by an appropriate length to provide an appropriate stopper, the protruding end 704 is separated from the upper surface 62 of the cam plate 6. It becomes accessible.

  Next, a roller 705 is rotatably attached to the protrusion (support shaft) 302 of the support plate 3. When the roller 705 is fitted into the cam groove 61 of the cam plate 6 and is appropriately removed, the roller 705 rolls along the cam groove 61, so that the protrusion 302 is in contact with the cam groove 61. It becomes slidable.

  Then, the protrusion 601 of the cam plate 6 is inserted through the shaft hole 533 of the right bracket 52 of the frame body 5. A long member 602 is attached along the protrusion 601, the lower end of the coil spring 801 is engaged with the protrusion 603 of the long member 602, and the upper end thereof is engaged with the protrusion 517 of the frame body 5. It is set so that a tensile force is always applied between 603. On the other hand, the lower end of the gas spring 802 is engaged with the protrusion 303 of the support plate 3, and the upper end thereof is engaged with the protrusion 532 of the frame body 5 so that the pushing force is always applied to the protrusion 532. This push-up force is a flip-up force that acts to flip up the frame 5 upward.

  4A and 4B are diagrams showing the operation of the apparatus, wherein FIG. 4A is a perspective view showing a state in which the boarding / egression blocking lever is lowered and a functional explanatory view thereof, and FIG. It is the perspective view which shows the raised state with a dashed-two dotted line, and its function explanatory drawing. In each function explanatory diagram, the black circle is the rotation center (fixed center) on the support plate 3, the white circle is the rotation center (permanent center) between the frame 5 and the cam plate 6, and the black triangle is on the support plate 3. The support point (simple support) of the cam plate 3 is shown. Here, for convenience of explanation, the protruding end 704 is separated into a function as a rotation center and a function as a support point.

  In a simplified manner, this device uses a slider portion of a slider crank mechanism, which is a type of link mechanism, as a cam groove. Unlike the conventional example in which the link mechanism and the cam mechanism are provided separately, the link mechanism and the cam mechanism It has a simple and compact structure.

  Now, it is assumed that the tip 41 of the getting-on / off blocking lever 4 is positioned below. At this time, as shown in FIG. 4A, the frame body 5 is in the forwardly lowered state, and the upper surface 62 near the rear end of the cam plate 6 is in contact with the protruding end 704. Further, the roller 705 is located at the foremost part of the cam groove 61. Therefore, the cam plate 6 is in a posture of being stretched between the protruding end 704 and the roller 705. In this posture, both the tension direction by the coil spring 801 and the pressing direction by the gas spring 802 act in a direction substantially perpendicular to the cam groove 61 in the region between the protruding end 704 and the roller 705. Therefore, the cam plate 6 is in a state in which the rotation operation is restricted by the protruding end 704 and the roller 705, and there is no possibility that the cam plate 6 rotates naturally.

  At this time, the pressing force by the gas spring 802 is prorated in inverse proportion to the distance from the protruding end 704 to the pressing position and from the roller 705 to the pressing position, and is applied to the protruding end 704 and the roller 705, respectively. It will take. In addition, the pulling force by the coil spring 801 is originally concentrated on the roller 705 side from the position where the pulling force is applied, but here, the pulling force and the pressing force are transmitted via the long member 602. Since the share is applied to the protrusion 601, almost no force is applied to the roller 705. This improves the durability of the roller 705 and the cam groove 61 of the cam plate 6 on which the roller 705 slides. At this time, since the contact of the limit switch 523 is in contact with the upper surface of the long member 602, the state is detected, and the work operation lever 2 is operated via the electrohydraulic circuit (not shown) that receives this detection signal. It is possible.

  Next, it is assumed that the tip 41 of the getting-on / off blocking lever 4 is operated upward against the share on the protruding end 704 side between the pressing force by the gas spring 802 and the pulling force by the coil spring 801. This operating force may be equal to or greater than a force obtained by apportioning the above-mentioned share in inverse proportion to each distance between the tip 41 of the boarding / alighting cutoff lever 4 and the protrusion 601 and between the protrusion end 704 and the protrusion 601. At this time, as shown in FIG. 4B, the cam plate 6 together with the boarding / alighting cutoff lever 4 rotates clockwise around the protrusion 601 and around the roller 705, so that the upper surface 62 is separated from the protruding end 704. .

  When the cam groove 61 is directed upward, the coil spring 801 pulls the cam plate 6 upward, so that the cam plate 6 is rotated clockwise by the pulling force. At this time, since the roller 705 slides in the cam groove 61, the upward movement of the cam plate 6 is not hindered. Then, since the gas spring 802 always presses the frame 5 upward, the frame 5 is pushed up together with the cam plate 6 by the pressing force. Therefore, the control box 1 having the frame 5 and the cam plate 6 as a whole turns around the turning center of the support plate 3 and jumps upward.

  FIG. 4B shows this state. At this time, the cam plate 6 rotates in the A direction in the functional diagram and moves in the B direction. Then, the rotation angle of the cam plate 6 becomes larger than the rotation angle of the frame 5 and finally the tip 41 of the boarding / alighting blocking lever 4 faces upward, so that the driver's getting off is not hindered. Become. Further, at this time, the long member 602 rotates together with the cam plate 6 and the limit switch 523 detects its state because the contact is separated from the upper surface of the long member 602, and receives this detection signal. The operation control lever 2 becomes inoperable by the action of an electrohydraulic circuit (not shown).

  Next, it is assumed that the tip 41 of the getting-on / off blocking lever 4 is pushed downward again. Also at this time, since the pressing force of the gas spring 802 is applied upward, an operating force sufficient to overcome it is required. This operating force is also a force that apportions the share of the pressing force by the protruding end 704 in inverse proportion to the distance from the tip 41 to the protrusion 601 and the distance from the protruding end 704 to the protrusion 601. That is all you need. When the operating force is applied to the tip 41 of the entrance / exit blocking lever 4, the cam plate 6 rotates for the first time around the protrusion 601 and counterclockwise around the roller 705, and finally the cam body 6 The upper surface 62 comes into contact with the protruding end 704. At this time, the entrance / exit cutoff lever 4 is pushed down against the pressing force of the gas spring 802, but the pulling direction of the coil spring 801 coincides with the downward force of the cam plate 6. The operation force of 4 is reduced.

  Then, as shown in FIG. 4A again, when the upper surface 62 at the rear end of the cam plate 6 comes into contact with the protruding end 704, the roller 705 is positioned below the cam groove 61. In this posture, both the pulling direction by the coil spring 801 and the pressing direction by the gas spring 802 act in a direction substantially perpendicular to the cam groove 61 in the region between the protruding end 704 and the roller 705. Therefore, the cam plate 6 is in a state in which the rotation operation is restricted by the protruding end 704 and the roller 705, and there is no possibility that the cam plate 6 rotates naturally. Further, as described above, the pulling force by the coil spring 801 is applied to the protrusion 601 via the long member 602, so that almost no force is applied to the cam groove 61 of the cam plate 6. At this time, the tip 41 of the getting-on / off blocking lever 4 faces downward, which obstructs the driver's unintentional getting-off. Further, at this time, the long member 602 rotates to the original position together with the cam plate 6, and the limit switch 523 detects its state because the contact of the limit switch 523 contacts the upper surface of the long member 602. The work operation lever 2 can be operated by the action of an electrohydraulic circuit (not shown) that receives the signal.

  As described above, according to the present embodiment, when the boarding / alight-blocking lever 4 is in the lying posture, the cam plate 6 is stretched between the roller 705 and the protruding end 704, and the middle Is pushed up by the gas spring 802, while the control box 1 is prevented from jumping up, the cam plate 6 is centered on the protrusion 601 when the getting-off / cut-off lever 4 is changed from the lying posture to the standing posture. By rotating around the roller 705, it is disengaged from the projecting end 704, and in that state, it is pulled by the coil spring 801 and moves in the direction in which the control box 1 jumps up. As a result, the manufacturing cost is reduced. Further, since the link mechanism is not provided separately from the cam mechanism, the link mechanism is shortened in the front-rear direction, and the size can be reduced.

  In the above-described embodiment, the upper surface 62 of the cam plate 6 is in contact with the protruding end 704 so as to be detachable. However, this locking position does not necessarily coincide with the second rotation center. It is also possible to provide a locking portion and lock it in the vicinity of the second rotation center.

  In the above-described embodiment, the jumping force of the control box 1 is added by the gas spring 801 that pushes up the central portion of the frame 5 of the control box 1 in the front-rear direction. May be used.

  Moreover, in the said embodiment, the 2nd rotation fulcrum and the support shaft are each provided with the protrusion end 704 and the roller 705 which can rotate centering on the said rotation fulcrum and an axis | shaft, and the cam board 6 is 2nd. The slider crank mechanism has an upper surface 62 that comes into contact with a projecting end 704 provided at a pivot fulcrum of the slidable member and a cam groove 61 that slidably comes into contact with a roller 705 provided on a support shaft. However, other link mechanisms and the like may be employed. Further, the protruding end 704 may be provided with a roller, or conversely, the roller 705 may be used as the protruding end. By providing the roller in this way, it is possible to reduce wear of the contact portion and improve its durability.

  Further, in the above-described embodiment, when the getting-on / off blocking lever 4 is in the lying posture, the upper surface 62 of the cam plate 6 is in a substantially horizontal posture, and the cam groove 61 has a U-shape when viewed from the side. Is in a standing posture, the upper surface 62 of the cam plate 6 is in a substantially vertical posture, and the cam groove 61 is in a U-shape that is reversed left and right in side view, but the cam plate 6 is in a substantially horizontal posture. Any other cam shape may be adopted as long as the front and back of the bending point are lowered.

  Moreover, in the said embodiment, although the rear end of the boarding / alight-blocking lever 4 is being fixed to the front part of the cam board 6, you may integrally form both.

  In the above-described embodiment, a hydraulic excavator control device as an example of a construction machine has been described. However, the scope of application of the present invention is not limited to this, and the present invention is also applied to a control device of another construction machine such as a wheel crane. The same applies.

1 is a perspective view showing an external configuration of a hydraulic shovel control device according to an embodiment of the present invention. It is a figure which shows the detail of a main component, Comprising: (a) is a left view of a frame, (b) is a left view of a cam board with a boarding / blocking lever, (c) is a left view of a support board. is there. It is a figure which shows the whole assembly state, Comprising: (a) is a left view, (b) is a top view, (c) is a front view. It is a figure which shows operation | movement of this apparatus, Comprising: (a) has shown the state in which the boarding / alighting interruption lever is lowered, (b) has shown the state in which the boarding / alighting interruption lever was raised. It is explanatory drawing which shows the control apparatus in an example of the past.

Explanation of symbols

1 Control box 2 Operation lever 3 Support plate (auxiliary member extended from the seat stand)
4 Entry / exit blocking lever 5 Frame 6 Cam plate (moving member)
10 Seat stand 61 Cam groove (groove)
62 Upper surface 302 Protrusion (support shaft)
601 Protrusion (first pivot point)
702 Horizontal axis (control box rotation spindle)
704 Protruding end (second pivot point)
705 Roller 801 Coil spring (tensile member)
802 Gas spring (pressing member)

Claims (4)

A control box with a work control lever is arranged on the side of the seat stand of the driver's seat, and a boarding / leaking-off lever that can be raised and lowered around the first rotation fulcrum located at the front of the control box is arranged, In conjunction with the operation of the entrance / exit blocking lever, the control box is flipped up from the locking position during operation to the rearward position from the locking position during work, centering on the second pivot point on the seat stand located on the side of the rear side. In a construction machine control device configured to move,
Fixed to the elevating breaking lever, a moving member which rotates multiplication descending breaking lever integrally about said first pivot point,
A pressing member that is provided between the control box and the seat stand, and pushes up the control box so as to add a jumping force for the flip-up rotation to the control box;
The seat stand includes a control box rotation support shaft that is an axis of the second rotation support point, and a support shaft for supporting the moving member at a position away from the second rotation support point. Is provided,
The moving member has a groove in which the support shaft is fitted slidably,
The groove is, in a state where the control box is at locking position the work, and without the front and back drops through the bending point shape, edge portions before the groove, the second of said control box Centered around the pivot point, it is set to an angle that prevents the turning-up rotation from the locking position at the time of work to the rearward position,
The pressing member may be the support shaft pushes up the control box so as to abut from below the upper rear surface of the moving member in the control box rotation support shafts in a state fitted to portion downward before the groove By locking the control box to the seat stand at the locking position during the operation ,
The moving member is centered on the first rotation fulcrum in a direction in which a rear portion of the moving member is separated from the control box rotation support shaft as the getting-off / cut-off lever is rotated from the lying posture to the standing posture. By rotating , the support shaft is moved from the front lowering portion to the rear lowering portion of the groove portion, thereby releasing the locking state and moving in the direction in which the control box jumps up together with the getting-on / off blocking lever. A control device for a construction machine. The shape of the rearwardly descending portion of the groove portion is set so that the boarding / alight-blocking lever is relatively rotated in a direction in which the control box further rises as the control box is flipped up. Item 3. A construction machine control device according to Item 1. 3. A tension member for applying a predetermined tensile force between a position eccentric from the first rotation fulcrum in the center direction of the moving member and a front side of the control box. Construction machine control device. The construction according to any one of claims 1 to 3 , wherein the support shaft has a roller rotatable around the support shaft, and the roller is fitted into a groove portion of the moving member. Mechanical control device.