JP2727290B2 - Work vehicle control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device including a control lever in a working vehicle such as a vehicle construction machine and a vehicle industrial machine.

[0002]

2. Description of the Related Art FIG. 7 shows an example of a conventional control device for a construction vehicle such as a hydraulic excavator. Generally, a control device A of a construction vehicle is disposed on a side adjacent to a driver's seat, and a control lever B provided on the control device A is supported by a support box C. As the support box C, a type in which the position of the control lever is fixed or a type in which a control lever is provided with a front-rear slide mechanism for adjusting the position in the front-rear direction is known. In the above-described conventional configuration, the control lever is located at the side of the driver's seat, and the arm is in an obliquely sideways position during operation, which is an impossible posture. Further, since the height of the control lever is constant, it may not match the physical characteristics of the worker, and the arm is easily fatigued during operation. Further, the control lever disposed in front of the driver's seat may be an obstacle when the operator sits on or leaves the driver's seat.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is provided with a control lever when the control lever performs drive control or work machine control with an electric signal like a joystick. It is another object of the present invention to provide a control device for a working vehicle which can adjust the height of a control box and can be displaced in front of a driver's seat.

[0004]

In order to solve the above-mentioned problems, the present invention provides: (a) a control box supporting device arranged on a side of a driver's seat of a working vehicle; The box support device is provided with an elevating member for supporting and elevating the control box so that the control box can be adjusted in height, and the control box has one or more control levers. (C). With the base end of the control box as a fulcrum A technical means is provided in which a turning means is provided which can be displaced between a use position in which the front end is turned sideways in front of the driver's seat and a non-use position in which the front end is rotated forward.

[0005]

The control box is provided on the side of the driver's seat and is moved up and down by the elevating member, so that it can be adjusted to an optimum height which is easy for the operator to use. Further, the control box can be displaced to a use position in which the control box is turned sideways in front of the front of the driver's seat and a non-use position in which the front end is rotated forward by using the turning means. Therefore, one or more control levers provided in the control box can be operated in front of the driver's seat, and operability can be improved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a control device for a working vehicle according to the present invention will be described below with reference to FIGS. The control device comprises a control box 2 having one or more control levers 1.
And the control box 2 is placed on the side of the driver's seat, in the case of the present embodiment, on the right side of the control box support device 3, and the control box 2 is rotatably and vertically mounted on the control box support device 3. It comprises a swivel / lift device 4 which is supported so as to be freely adjustable.

The control lever 1 is of a joystick type, and is disposed so as to be slightly inclined backward at a predetermined angle with respect to the vertical direction. 2) are arranged. In the present embodiment, the control lever 1 is arranged so as to be at the center in front of the driver's seat D at a later-described use position of the control box 2 (see FIG. 6).

The control box 2 has a horizontally long shape as shown in FIGS. 1 and 3, and a frame 5 having a highly rigid structure is provided inside. As shown in FIG. 3, the control box 2 and the frame 5 have a portion located in front of the driver's seat in the use position set slightly upward, and are mounted on the upper part of the turning / elevating device 4 at one end. It is formed to be slightly higher than the side.

Further, the control box 2 is
It has a divided structure, and instruments and lamps (both not shown) such as a tachometer and a pilot lamp are arranged around a place where the control lever 1 is mounted. As shown in FIGS. 4 and 5, the frame 5 is formed of a member having an angled cross section and extends, and one or more (two in the illustrated example) brackets 6 are mounted on the upper surface. . The control lever 1 described above is mounted on the bracket 6. A lower surface of one end (base end) of the frame 5 is fixed to a support bracket 10 provided on an upper part of the revolving and lifting device 4 with bolts or the like.

As shown in FIG. 4, the turning and lifting device 4 is provided with a front-rear slide mechanism 7 attached to the control box support device 3 disposed on the side of the driver's seat D, in this embodiment, on the right side. It is provided in front. The revolving / elevating device 4 is provided with an elevating cylinder (a gas-filled cylinder in this embodiment) 11 at the center thereof and has a structure capable of extending and contracting in the vertical direction. It is rotatably mounted on a plate 16 fixed below the 12. The upper part of the lifting cylinder 11 is supported by a support bracket 10 fixed to the lower surface of a frame 5 formed inside the control box 2.
It is connected to.

The upper end of a cylindrical support 18 to which the lifting cylinder 11 is fitted is fixed to the support bracket 10. The support 18 is fitted and supported in a cylindrical bracket 17 fixed above the slide support 12. Therefore, support 18
Can be slid up and down with respect to the bracket 17 and can be turned. The friction surfaces of the support 18 and the bracket 17 can be smoothly slid and rotated by a cylindrical bearing 20 using a material having a low friction coefficient.

The bracket 17 is provided with a stopper 19 (a pin projecting toward the support 18 in this embodiment) for positioning in the vertical direction and the turning direction. On the other hand, a guide portion (a groove (not shown) provided on the outer periphery in the present embodiment) corresponding to the stopper 19 is formed on the outer periphery of the support 18, and the support 18 moves up and down by engagement of the stopper 19 and the guide portion. Alternatively, the control lever 2 is configured to be able to turn, and to restrain vertical movement or turning at an appropriate position of the control lever 2 by the action of the stopper 19.

An auxiliary pipe 21 is provided inside the support 18, and the auxiliary pipe 21 is fixed to one end of the elevating cylinder 11, in this embodiment, to the rod side. The pin 2 provided at the lower end of the support 18
2 is guided by entering into a guide portion (a groove (not shown) provided on the outer periphery in this embodiment) provided on the outer periphery of the auxiliary pipe 21. When the support 18 moves up and down and turns, the inner auxiliary pipe 21 also moves therewith. At the same time, the lift cylinder 11 moves up and down and turns, and the lift cylinder 11 fixed to the auxiliary pipe 21 is also fixed at the same time. If an excessive load is applied to the lift cylinder 11 from the outside, damage such as breakage or gas leakage may occur. Is prevented from occurring. Then, as shown in FIG. 6, the control box 2 pivots around the elevating cylinder 11 to the support 18 between a use position in which the driver's seat D is laterally in front of the front of the driver's seat D and a non-use position in which the front end is rotated forward. It is possible.

Next, the front-rear slide mechanism 7 is fixed to the floor 13 of the cab with bolts or the like. That is, the front-rear slide mechanism 7 is a mechanism for moving the movable portion of the control box support device 3 back and forth, and is provided on the slide rail 14 fixed to the floor surface and the movable portion and along the slide rail 14. And a sliding runner 15. In the present invention, the front-rear slide mechanism 7 is not limited to the above embodiment, and a slide function can be appropriately used.

In this embodiment, a switch S is provided which is controlled to be turned on and off in conjunction with the displacement of the control box 2 between the used position and the non-used position. That is, when the control box 2 is in the use position, the switch S is turned on to close the operation circuit for changing the operation of the control lever 1 to a control signal, and when the control box 2 is displaced to the non-use position, the switch S is turned off. Open the above electrical circuit.

In the illustrated example, the switch S is provided on the upper surface of the control box support device 3 and turned on and off by the displacement of the control box 2. However, the switch S or the sensor for detecting the use position or the non-use position is in short. Any configuration may be used. According to this, when the control box 2 is displaced to the non-use position, even if the control lever 1 moves, the operation of the control lever 1 is not converted into a control signal, and the hydraulic circuit of the drive system and / or the working machine system is controlled. Therefore, malfunction of the control lever 1 can be reliably prevented. In the above-described embodiment, the mechanism for turning the control box and the mechanism for moving up and down are performed using the turning and lifting device. However, a method of realizing each of them using a separate structure may be used. In the present invention, the working vehicle includes civil engineering / construction machinery and other vehicle-based industrial machines.

[0017]

As described above, according to the present invention, the position of the control lever is arranged in front of the driver's seat, and the direction of movement of the driver's arm during operation is the forward / backward direction. Fatigue can be reduced. In addition, since the height of the control lever is variable in the vertical direction, an optimum operation state according to the physique of the driver can be obtained. The control lever disposed in front of the driver's seat is rotatable, so that when the driver leaves the driver's seat, the driver can easily move away from the control lever disposed in front of the driver's seat without being disturbed.

[Brief description of the drawings]

FIG. 1 is a front view of a preferred embodiment of a work vehicle control device.

FIG. 2 is an external side view of the embodiment.

FIG. 3 is a front sectional view showing the internal structure of the embodiment.

FIG. 4 is a side sectional view showing the internal structure of the embodiment.

FIG. 5 is a plan view showing the internal structure of the embodiment.

FIG. 6 is a plan view showing a turning state of the control box.

FIG. 7 is a perspective view illustrating an example of a conventional control device for a construction vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control lever 2 Control box 3 Control box support device 4 Revolving and elevating device 7 Front and rear slide mechanism 11 Elevating cylinder 18 Support 19 Stopper S switch

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiko Taya 7-1 Hattobukichi, Matsudo-shi, Chiba Prefecture Kanto Technical Office, Ministry of Construction (72) Inventor Kisaburo Odabe 3700 Tana, Sagamihara-shi, Kanagawa Prefecture New Caterpillar Mitsubishi Stock In-company (72) Inventor Shinya Hirose 3700 Tana, Sagamihara-shi, Kanagawa Prefecture Inside New Caterpillar Mitsubishi Co., Ltd. References Hikaru 6-4169 (JP, U)

Claims (4)

(57) [Claims] 1. A control box support device disposed on a side of a driver's seat of a working vehicle, and a control box provided on the control box support device and having one or a plurality of control levers is adjustably supported. Elevating member that moves up and down, and can be displaced between a use position in which the tip side is turned around the base end side of the control box as a fulcrum and the driver's seat is turned sideways, and a non-use position in which the tip side is rotated forward. A control device for a working vehicle, comprising a simple turning means. 2. The work vehicle according to claim 1, wherein the work vehicle comprises a hydraulic excavator, and a turning means capable of turning around a lifting member supporting the control box is provided. Control device. 3. The control device for a working vehicle according to claim 1, wherein the control box support device has a built-in slide mechanism that can slide back and forth. 4. The working vehicle according to claim 1, further comprising a switch for operating a control lever that is controlled to be turned on and off in accordance with displacement of the control box between a used position and a non-used position. Control device.