JP2007247190A - Steering gear for construction equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure a large space used by an operator when getting on and off a driver's seat to facilitate getting-on-and-off. <P>SOLUTION: This steering gear for construction equipment provided with a running lever 25 for swinging an upper end side in the forward and backward directions by using the sections in the vicinity of feet of the operator seated on the driver's seat as fulcrums on a front side of the driver's seat for running operation is provided with a running lever position control means 26 for tilting the running lever 25 from a neutral position into the forward direction for letting the running lever 25 leave the driver's seat automatically when an engine stops. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a control device for a construction machine such as a hydraulic excavator, and in particular, swings in the front-rear direction on the front side of the driver's seat, with the vicinity of the operator's feet seated in the driver's seat as a fulcrum. The present invention relates to a construction machine control device provided with a travel lever for performing a travel operation.

  Conventionally, a construction machine such as a hydraulic excavator is composed of a self-propelled lower traveling body, an upper revolving body that is turnable on the lower traveling body, and a work device provided on the front side of the upper revolving body. It is generally configured (see, for example, Patent Document 1).

  The upper swing body is provided with a cab that is located on one side of the front portion of the swing frame and defines a driver's cab, and a driver's seat on which an operator is seated is provided in the cab. A console box provided with a work lever for operating the work device is provided. A traveling operation device for traveling the lower traveling body is provided on the front side of the driver seat.

The travel operation device includes a foot pedal disposed in the vicinity of the foot of an operator seated in the driver's seat, the movement of the foot pedal, and the upper end side in the front-rear direction with the foot pedal side as a fulcrum. And a travel lever that is moved while swinging. Further, the foot pedal and the travel lever are automatically held in the neutral position when not operated.
Japanese Patent Application Laid-Open No. 2005-213935.

  However, in a construction machine as described in Patent Document 1, console boxes provided with working levers for operating the working device are provided on the left and right sides of the driver's seat in the driver's seat, and front and rear in the front of the driver's seat. A foot pedal and a travel lever that swing in a direction are provided, and when the foot pedal and the travel lever are not operated, these are held in a neutral position. For this reason, there is a problem that an operator sitting in the driver's seat has a narrow gap when getting on and off between the traveling lever and the working lever.

  Therefore, there is a technical problem to be solved in order to secure a large space for the operator to get on and off the driver's seat and to easily get on and off, and the present invention solves this problem. Objective.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is characterized in that the front side of the driver's seat is located at the front end of the operator seated on the driver's seat with the fulcrum as the fulcrum. In a construction machine control device provided with a travel lever that swings in a direction and performs a travel operation, when the engine is stopped, the travel lever automatically tilts forward from the neutral position to the driver's seat. Provided is a construction machine control device provided with lever position control means.

  According to this configuration, when the operator stops the engine, the traveling lever is automatically tilted forward to leave the driver's seat, and between the driver's seat and the traveling lever, the operator can easily get on and off. A large space is secured.

  According to a second aspect of the present invention, in the first aspect, the travel lever position control means is moved from the forward position to the neutral position in conjunction with a shift to the engine start operation. The construction machine control device according to claim 1, wherein the construction device is returned to the above.

  According to this configuration, when the operator sits in the driver's seat and starts the engine start operation, the traveling lever is automatically returned from the forward position to the neutral position and enters the standby state.

  According to the first aspect of the present invention, when the operator stops the engine and leaves the driver's seat, the traveling lever is automatically tilted forward to leave the driver's seat, and a large space is secured between the driver's seat and the traveling lever. Therefore, it is possible to expect an effect that the operator can easily get on and off.

  According to the second aspect of the invention, the position of the travel lever is automatically switched from the forward position to the neutral position in conjunction with the engine start operation by the operator. Improvement can be expected.

  In order to achieve the purpose of ensuring a large space for the operator to get on and off the driver's seat and facilitating getting on and off, the front of the driver's seat is located near the feet of the operator seated on the driver's seat. Then, in a construction machine control device provided with a travel lever that swings the upper end side in the front-rear direction to perform a travel operation, when the engine is stopped, the travel lever is moved forward from the neutral position to the driver's seat. This is realized by providing a travel lever position control means that automatically tilts.

  Hereinafter, the control device for a construction machine according to the present invention will be described with reference to preferred embodiments.

  FIG. 1 shows a hydraulic excavator as a construction machine to which the present invention is applied. The hydraulic excavator 10 includes a self-propelled lower traveling body 11, an upper revolving body 13 provided on the lower traveling body 11 via a revolving mechanism 12, and a front side of the upper revolving body 13. The cab 14 that defines the cab provided in the section and the work device 15 provided on the other front side of the upper swing body 13 are roughly configured. The work device 15 includes a boom 16, an arm 17, a bucket 18, and the like.

  3 and 4 show a schematic configuration inside the cab 14. Console boxes 20 and 20 provided with work levers 19 for operating the work device 15 are disposed on both the left and right sides of the cab 14, and seating as a driver seat on which an operator sits between the console boxes 20 and 20. A seat portion 21 is installed. In addition, when the operator is seated on the seating seat portion 21 on the front side of the seating seat portion 21, a pair of left and right traveling operation devices 23, 23 are positioned on the floor plate 22 at a position in front of the operator and near the operator's feet. Is arranged.

  Each travel operation device 23, 23 is connected to a foot pedal 24 disposed corresponding to the vicinity of the foot of the operator seated in the driver's seat, and a pilot valve (not shown) having the lower end portion the same as the foot pedal 24, And a traveling lever 25 disposed so that the upper end portion provided with the knob 25a protrudes to the front side of the driver's seat, and the traveling lever 25 is moved in the front-rear direction following the movement of the foot pedal 24. It has become.

  When the lower traveling body 11 is not traveling, the traveling lever 25 is automatically disposed and held at a neutral position indicated by a symbol N in FIG. 3, and when traveling forward, by the operator's operation, 3, the vehicle is tilted toward the forward tilt position indicated by the symbol F in FIG. 3, and is also tilted toward the rear side, that is, the rearward tilt position indicated by the symbol B in FIG.

  As shown in FIG. 3, the travel lever position control means 26 is connected to each travel operation device 23 in a common state. The travel lever position control means 26 forcibly moves the travel levers 25, 25 from the neutral position N to the forward tilt position F when the engine (not shown) is stopped, and when the engine is started, the travel lever 25 is moved from the forward tilt position F to the neutral position. Control to return to N. As the travel lever position control means 26, for example, a hydraulic control system using a hydraulic cylinder or an electric control system using an electromagnetic switch is used.

  FIG. 4 is a configuration diagram showing an example of the travel lever position control means 26. The travel lever position control means 26 includes a microcomputer (commonly called “microcomputer”) 27, an engine operation detection means 28, and a travel lever position switch 29. The microcomputer 27 incorporates a program for controlling the entire travel lever position control means 26 in accordance with a predetermined procedure. The engine operation detection means 28 detects the transition to engine stop and start operations and outputs respective signals to the microcomputer 27. The travel lever position switch 29 forcibly moves the travel levers 25, 25 from the neutral position N to the forward tilt position F based on the signal from the microcomputer 27, or the travel levers 25, 25 are moved forward. To return to the neutral position N.

  FIG. 5 is a flowchart showing an example of a program incorporated in the microcomputer 27.

  Next, the operation of the travel lever position control means 26 will be described according to the flowchart shown in FIG. First, when the engine start is in a standby state, such as when an engine key is inserted, the flow starts. When the signal from the engine operation detection means 28 detects the transition to the engine start standby state (step S1), the travel lever position switch 29 is operated and the travel lever 25 is returned to the neutral position (step S2). ). As a result, the traveling operation device 23 can be freely operated.

  When the operation is stopped and the operator leaves the seating seat portion 21 to stop the engine and this is detected by a signal from the engine operation detecting means 28 (step S3), the travel lever position switch 29 is operated. The travel lever 25 is forcibly returned from the neutral position N to the front position F (step S4), and a large space is secured between the travel lever 25 and the seating seat portion 21. This makes it easier for the operator to get on and off. This state is held again as a standby state until a transition to the engine start state is detected again.

  Therefore, according to the structure of the present embodiment, when the engine is stopped and the operator stands up from the seating seat portion 21 and leaves the driver's seat, the traveling lever 25 moves away from the front of the seating seat portion 21 that is the driver's seat. Since it is automatically tilted to a certain front position F and a large space is secured between the driver's seat and the travel lever 25, the operator can easily get on and off.

  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.

1 is a side view of a hydraulic excavator to which the present invention is applied. The perspective view inside the cab of a hydraulic excavator same as the above. The arrangement | positioning side view of the principal part structure inside a cab same as the above. The block diagram of the configuration of the travel lever position control means in the hydraulic excavator. The flowchart which shows one operation example of a driving lever position control means same as the above.

Explanation of symbols

14 Cab 21 Seating seat
22 floor board 23 travel operation device 24 foot pedal 25 travel lever 26 travel lever position control means

Claims (2)

In a control device for a construction machine provided with a travel lever on the front side of the driver's seat that swings the upper end side in the front-rear direction with the vicinity of the operator's feet seated in the driver's seat as a fulcrum.
A control device for a construction machine, comprising travel lever position control means for automatically tilting the travel lever in a forward direction away from the driver's seat when the engine is stopped.   The travel lever position control means is configured to automatically return the travel lever from the forward position to the neutral position in conjunction with a shift to the engine start operation. Item 3. A construction machine control device according to Item 1.

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