JP4491623B2 - Construction machine operation device - Google Patents

Description

The present invention relates to an operation device for a construction machine, and more specifically, to a technical field relating to locking of a work machine, a console box jumping mechanism, and opening / closing of an entrance / exit passage.

  For construction machines such as hydraulic excavators, a console box is arranged on the left and right sides of the driver's seat, and an operation lever for operating the work machine (operating the machine, turning, etc.) is provided on the upper side of the console box. Provided. When the operator gets in and out of the driver's seat or when the operator is not in the vehicle, the work machine is shut off to lock the work machine so that the work machine does not suddenly start even if the operator touches the operating lever accidentally. A locking device is provided for safety. However, if the operator forgets to lock the locking device and gets off the vehicle, the above inconvenience may occur.

  Therefore, in order for the operator not to forget to lock the lock device, a gate bar is provided in the operator's boarding / exiting passage, and when the operator gets off by linking the operation of this gate bar and the lock device, The lock device is locked, and when the operator is in the driver's seat, the gate bar is set to the closed position and the lock is released so that the operation can be performed.

  The operator boarding / exiting passage is provided in front of the operator's driver's seat, but since the extra space is small in the cab of the construction machine, the boarding / exiting passage cannot be made sufficiently wide. The operation lever is provided on the upper front side of the console box, and the front end of the operation lever protrudes into the boarding / alighting passage to obstruct the boarding / alighting. Therefore, there is also a construction machine in which the front end of the console box is flipped up to widen the entrance / exit passage.

For example, in the construction machine disclosed in Patent Document 1, when the operator gets out of the driver's seat, if the operation knob (corresponding to the gate operation lever of the present application) is operated from the shut-off position to the open position, the operation is linked. Then, the blocking lever (corresponding to the gate bar of the present application) changes from the blocking posture to the open posture, and the control box (corresponding to the console box of the present application) automatically changes from the working posture to the non-working posture. Further, in order to return the control box from the non-working posture (the state in which the present invention is flipped up) to the working posture, the control box is moved downward by pressing the handle (not present in the present application) downward. As a result, it automatically returns to an operable state.
Published patent publication, JP 2000-328604, construction machinery

  In the above-described conventional apparatus, the shut-off lever can be operated even when the control box is in a non-working posture, and there is a risk of erroneous operation. Further, when the control box is pushed down, the lock of the lock device is automatically released, and there is a risk that the machine may malfunction if the operation lever is accidentally touched.

  In the above conventional apparatus, when the operation knob (gate operation lever) is operated from the blocking position to the open position, the control box (console box) is automatically switched from the working position to the non-working position. That is, the control box is flipped up uniformly without distinguishing the difference in the physique of the operator (for example, the difference in whether the operator is fat or thin, or the difference in height if the operator is large). For this reason, useless operations are performed. For example, there is no need to flip up the control box for a slim operator. In addition, another lever (the handle 9) is used when the control box is pushed down, so that the operation becomes complicated. This application makes it a subject to provide the apparatus which solved such a problem and solved the above-mentioned risk of erroneous operation and malfunction.

The present invention employs the following configuration as means for solving the above-described problems. That is, the invention described in claim 1
A console box provided with an operation lever for operating the work machine is provided on the fixed frame so as to be pivotable, and a work position for operating the work machine and a jumping position for expanding a boarding passage provided in front of the console box. The gate bar is configured to be able to move up and down, and to be pivotable at a position where the boarding passage is blocked and a position where the boarding passage is opened, and the work machine operates when the gate bar is in the open position. In construction machinery with a locking device to lock
A gate operation lever for opening and closing the gate bar is provided on the console box so as to be rotatable. The gate operation lever allows the console box to be in a working position and the gate bar to be in a shut-off position. A first state in which operation is possible, a second state in which the console box is in a working position and the gate bar is in an open position and the operation of the work machine is locked, and the console box is in a jumping position; And the gate bar is in the open position, and is configured to be operable to a third state in which the operation of the work machine is locked,
A fixing means for fixing the console box in a working position when the console box is in the first state or the second state;
The fixing means is provided with a fixing member having a locking pin rotatably on the console box so that the axis of rotation of the gate operation lever coincides with the center of the axis, and is engaged with the locking pin. A joint portion is provided in the fixed frame .

With the above configuration, a slim operator can get off in the second state, and a fat operator can get off in the third state, thereby enabling efficient operation.

According to a second aspect of the present invention, in the first aspect of the invention, when the gate operating lever is operated from the second state to the third state, the fixing means is released, and the console box jumps up. It is characterized by the construction.

With the above configuration, a series of operations from the opening of the gate bar to the flip-up of the console box can be performed by operating only the gate operation lever, and the operation becomes simple.

With the above configuration, the console box can always be fixed at a fixed position regardless of the position of the gate operation lever.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein when the fixing means is released and the console box is in the jumping position, the gate operation lever is in the third state. A guide pin is provided in the fixed frame so as to be held by the gate, and a guide groove having a predetermined shape for guiding the guide pin is provided in the gate operation lever.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the gate operating lever is provided with a contact portion, and when the first operation is performed, the corresponding contact portion hits the limit switch. The construction is such that the lock of the work machine is released upon contact.

It is configured so that it can be operated from the first state to the third state by operating the gate operation lever, and the working state and the getting on / off state are selected from the first state to the third state, so that the operator's physique is considered. The effect that the operation for getting on and off becomes easy is obtained.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall side view of an embodiment of the present invention, and shows a view in which a front console box cover is omitted. 2 shows a cross-sectional view taken along arrow A in FIG. 1, and FIGS. 3 to 5 show detailed views of main components. In FIG. 1, a fixed frame 11 is fixed to a floor 10 of a cab (not shown) of a construction machine. A console box 12 is provided on the fixed frame 11 so as to be swingable by a shaft 13. The console box 12 is biased by a spring 14 in the flip-up direction (clockwise rotation in the figure). An operation lever 9 for operating the work machine protrudes from the front upper surface of the console box 12.

As shown in FIGS. 3A to 3C, the fixed frame 11 has a U-shaped cross section, shaft holes 16 are formed in both side plates, and one pin 17 that fixes the biasing spring 14 protrudes. It is installed. Note that FIG. (A) is a front view, FIG. (B) is a side view, and FIG. (C) is a perspective view. A notch 18 (engagement portion) is formed above the front end portions of the both side plates, and a guide pin 19 protrudes at an appropriate position (described later) corresponding to the notch 18.

A gate operation lever 20 is pivotally attached to an appropriate position of the console box 12 by a shaft 21. As shown in FIGS. 4 (A) and 4 (B), the gate operation lever 20 is composed of a plate-shaped member, has an operation portion 22 at the head, and has a shaft hole 23 fitted into the shaft 21 at the substantially center. A pin hole 24 for connecting the gate bar is formed at the center front end. Further, a notch groove 25 is formed in the same shape as the notch 18 at a position that coincides with the notch 18 of the fixed frame 11 when mounted (after assembly). In addition, a guide groove 26 that fits with the guide pin 19 is formed at the lower end. The guide groove 26 is formed in an L shape in which a substantially horizontal groove 26a and a substantially vertical groove 26b are connected. The groove 26a is an arc centered on the shaft hole 23, and the groove 26b is formed on the shaft hole 16 (shaft 13). It consists of a circular arc as the center. A contact portion 27 that contacts a limit switch 42 (described later) is provided at the upper rear end so as to protrude in a direction perpendicular to the main body plate-like portion. Instead of providing the shaft hole 23, the shaft 21 may be provided fixed to the gate operation lever 20.

Further, the shaft 21 is provided with a fixing member 30 that can rotate independently of the gate operating lever 20. As shown in FIGS. 5 (A) to 5 (C), the fixing member 30 has a cylindrical portion 31 that fits and rotates with the shaft 21 at the head portion, and a notch portion 18 and a gate operation lever at the lower portion of the fixing frame 11. The engaging part 32 engages with the 20 notch grooves 25 and a connecting member 33. The locking portion 32 of the fixing member 30 is biased by a spring 34 in the counterclockwise direction.

Further, as shown in FIG. 1, the gate bar 36 is pivoted at the front end of the console box 12 so that the boarding / alighting passage provided in front of the console box 12 can be blocked (dotted line position) and opened (solid line position). 37 is provided so as to be rotatable. A pin hole 39 provided at the upper end of the gate bar 36 is pin-connected to the pin hole 24 of the gate operation lever 20 via a connecting member 38. Further, a tension spring 40 is provided between the connecting member 38 and the gate bar 36 so that the gate bar 36 stops at any one of the blocking position and the open position, that is, does not stop at the intermediate position. Yes.

Further, as shown in FIG. 6, when the operation portion 22 is tilted forward, that is, when the gate operation lever 20 is rotated counterclockwise by an appropriate angle, the contact portion 27 contacts the limit switch 42. Then, the limit switch 42 is turned on, and the limit switch 42 is disposed so that the lock of the lock device (not shown) of the work machine is released, and the limit switch 42 and the lock device unlocking means (not shown) Are connected. When the limit switch 42 is off, the lock device locks the work machine.

With the above-described configuration, the console box 12 shown in FIG. 1 is in the work position and the gate bar 36 is in the open position and the operation of the work machine is locked by the operation of the operation unit 22 of the gate operation lever 20. The state (the state where the operation unit 22 is in (b)), and the first state (operation unit) in which the console box 12 shown in FIG. 6 is in the work position and the gate bar 36 is in the blocking position and the work machine can be operated. 22 is in the state (a)), and the console box 12 is in the flip-up position and the gate bar 36 is in the open position, and the operation of the work machine is locked.

That is, when the operation unit 22 is tilted forward from the position shown in FIG. 1B to the position shown in FIG. 1A, the gate operation lever 20 rotates counterclockwise, and the limit switch 42 is brought into contact with the contact portion 27. , The limit switch 42 is turned on, and the lock device of the work machine is unlocked. On the other hand, since the connecting member 38 moves rearward, the gate bar 36 rotates to the blocking position, and the state shown in FIG. 6 is obtained. At this time, the locking portion 32 of the fixing member 30 maintains the locking state with the notch portion 18 of the fixed frame 11, and the guide pin 19 of the fixed frame 11 is in the groove 26 a of the guide groove 26. It will not jump up. When the operation unit 22 is returned from the position shown in FIG. 6A to the position shown in FIG. 1B, the state shown in FIG. 1 is restored.

Next, when the operation unit 22 is tilted backward from the position shown in FIG. 1 (b) to the position shown in FIG. 1 (c), the gate operation lever 20 rotates clockwise and is fixed as shown in FIG. While the locking portion 32 of the member 30 is locked with the notch groove 25 of the gate operation lever 20, the locking portion 32 completely disengages from the locking state with the notch portion 18 of the fixed frame 11, and the guide pin 19 of the fixed frame 11 is guided by the guide groove As shown in FIG. 7, the guide pin 19 moves relatively downward in relation to the groove 26b as the console box 12 is moved to the corner of the groove 26a of the groove 26 (the connecting portion between the groove 26a and the groove 26b). Jump up. Further, in this state (FIG. 7), the guide pin 19 of the fixed frame 11 abuts the lower end portion of the substantially vertical groove 26b of the guide groove 26 of the gate operation lever 20, and the movement in the front-rear direction is suppressed. The gate operation lever 20 cannot be rotated forward (counterclockwise). In order to return to the state (b) in FIG. 1, when the console box 12 is pushed downward or the console box 12 is rotated integrally by operating the gate operating lever 20, the guide pin 19 moves into the groove 26a. At the same time, the locking portion 32 moves downward while sliding with the upper front end surface of the fixed frame 11. When the locking portion 32 reaches the position of the notch 18, the locking portion 32 is moved by the biasing force of the spring 34. To shift to the state (b).

9A shows the contents of the first state to the third state, FIG. 9B shows the transition to each state, the state that can be changed only by the operation of the gate operation lever 20 is shown by a solid line, and the dotted line is It indicates that the transition can be made by pushing down the front portion of the console box 12 downward or operating the gate operation lever 20 to rotate the console box 12 integrally.

  As described above, according to the present embodiment, it is possible to perform an efficient getting-on / off operation according to the physique of the operator and to obtain an effect that it is easy. Further, since an operation related to getting on and off can be performed only by operating the gate operation lever (because operation by another operation lever is not required), there is also an effect that an operation error hardly occurs. Since the operation of the gate control lever becomes impossible when the console box is returned to the operating state from the flipped-up state, the operation can be safely returned. In the operation of pushing down the console box from the state where the console box is flipped up, the work machine is in the locked state, so that even if the operation lever is accidentally touched, the work machine can be operated safely without being activated.

Needless to say, the technical scope of the present invention is not limited to the embodiments described above.

1 shows a side cross-sectional view of an embodiment embodying the present invention. The front sectional view seen from arrow A in FIG. 1 is shown. A front view (A), a side view (B), and a perspective view (C) of the fixed frame are shown. A front view (A) and a side view (B) of the gate operation lever are shown. A side view (A), a front view (B), and a perspective view (C) of the fixing member are shown. The figure which operated the gate bar to the interruption | blocking state is shown. The state figure which bounced up the console box is shown. An explanatory view of flipping up the console box is shown. (A) shows the contents of the first state to the third state, and (B) shows the transition of each state.

Explanation of symbols

9 Operation lever 11 Fixed frame 12 Console box 13 (Console box) Rotating shaft
14 (Console box) Biasing spring 18 Notch (engagement part)
19 Guide Pin 20 Gate Operation Lever 21 (Gate Operation Lever) Rotating Shaft 22 Operation Part 25 Notch Groove (Engagement Part)
26 Guide groove 26a Horizontal groove 26b Vertical groove 27 Abutting part 30 Fixing member 32 Locking part 34 (Locking part) Biasing spring 36 Gate bar 38 Connecting member

Claims (4)

A console box provided with an operation lever for operating the work machine is provided on the fixed frame so as to be pivotable, and a work position for operating the work machine and a jumping position for expanding a boarding passage provided in front of the console box. The gate bar is configured to be able to move up and down, and to be pivotable at a position where the boarding passage is blocked and a position where the boarding passage is opened, and the work machine operates when the gate bar is in the open position. In construction machinery with a locking device to lock
A gate operation lever for opening and closing the gate bar is provided on the console box so as to be rotatable. The gate operation lever allows the console box to be in a working position and the gate bar to be in a shut-off position. A first state in which operation is possible, a second state in which the console box is in a working position and the gate bar is in an open position and the operation of the work machine is locked, and the console box is in a jumping position; And the gate bar is in the open position, and is configured to be operable to a third state in which the operation of the work machine is locked,
A fixing means for fixing the console box in a working position when the console box is in the first state or the second state;
The fixing means is provided with a fixing member having a locking pin rotatably on the console box so that the axis of rotation of the gate operation lever coincides with the center of the axis, and is engaged with the locking pin. An operating device for a construction machine, wherein a joint portion is provided on the fixed frame . 2. The construction machine operating device according to claim 1, wherein when the gate operating lever is operated from the second state to the third state, the fixing unit is released and the console box jumps up. 3. . When the fixing means is released and the console box is in the raised position, a guide pin is provided on the fixed frame so that the gate operating lever is held in the third state, and the guide pin is guided. The operation device for a construction machine according to any one of claims 1 and 2, wherein a guide groove having a predetermined shape is provided in the gate operation lever. 2. The gate operating lever is provided with a contact portion, and when the first operation state is operated, the contact portion contacts a limit switch to release the lock of the work machine. The operating device for a construction machine according to any one of claims 3 to 4.

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