JP2015116162A - Work machine lifting operation device in work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and reliably perform adjustment operation of lifting up or down a work machine by internal operation from a driving position and external operation from outside the driving position.SOLUTION: A work machine lifting operation device in a work vehicle is configured such that: lifting means 15, 16 for controlling the lift of a work machine R are disposed near a driver seat 7 inside a machine body and the work machine R outside the machine body; the internal and external lifting means 15, 16 are switched from external operation to internal operation when operated from the inside during the operation from the outside; and the lifting means are switched to the external operation automatically when the internal operation is not operated for a prescribed period of time.

Description

  The present invention relates to a work implement lifting operation device in a work vehicle such as a tractor.

  Conventionally, the lifting and lowering means for controlling the lifting and lowering of the work equipment has been installed near the driver's seat side that can be operated inside the machine body and near the work machine side that can be operated from outside the machine body. When the machine is controlled to be lifted and the working machine is replaced with the traveling machine body, the lifting / lowering operation can be performed by an external lifting / lowering means (see, for example, Patent Document 1).

JP 2000-83411 A

  SUMMARY OF THE INVENTION An object of the present invention is to make it possible to easily and reliably perform an operation for adjusting the raising / lowering of a work machine, either by an internal operation from a driving position or by an external operation after getting off from a driving position.

In order to solve the above problems, the present invention has taken the following technical means.
That is, according to the present invention, the lifting means (15) and (16) for controlling the lifting and lowering of the work machine (R) are arranged near the driver seat (7) on the inner side of the machine body and the work machine (R on the outer side of the machine body). ) It is provided in the vicinity and the inside / outside lifting means (15), (16) is configured to switch from an external operation to an internal operation when operated on the internal side during an external operation. A working machine lifting / lowering operation device in a work vehicle is provided.

  According to the above configuration, even if the operation is being performed by the external lifting means, the operation is automatically switched to the internal operation if operated by the internal lifting means. Can be done.

  According to a second aspect of the present invention, when the internal side operation is not operated for a predetermined time or more, the operation machine is automatically switched to the external side operation. A device.

  According to the above configuration, after switching to the internal operation, when the internal operation is not performed for a predetermined time or longer, the operation is automatically switched to the external operation, so that the work implement can be accurately adjusted by the external operation.

  According to the third aspect of the present invention, the lifting means (15) and (16) for controlling the lifting and lowering of the work machine (R) are arranged near the driver seat (7) inside the machine body and near the work machine (R) outside the machine body. The internal / external elevating means (15), (16) is configured to switch from internal operation to external operation when operated on the external side during internal operation. It is set as the working machine raising / lowering operation apparatus in a working vehicle.

  According to the above configuration, even when the internal operation from the driver's seat (7) side is being performed, if the operation is performed by the lifting means on the external side, the operation is automatically switched to the external operation. Can be done easily.

  The present invention according to claim 4 is configured to automatically switch to the internal operation when the external operation by the external lifting means (16) is not operated for a predetermined time or more. 3. A work implement lifting operation device in the work vehicle described in 3.

  After switching to the external side operation, when the external side operation has not been performed for a predetermined time or longer, the operation mode is automatically switched to the internal operation.

  In short, according to the first aspect of the present invention, even if the operation is being performed on the external side, if the operation is performed on the internal side, the operation is switched to the internal operation. Can be done.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, when the operation is not performed even after a predetermined time after the internal operation, the operation is automatically switched to the external operation. Adjustment can be made reliably.

  According to the third aspect of the present invention, even when the internal operation from the driver's seat side is performed, when the operation is performed by the lifting means on the external side, the operation is automatically switched to the external operation. It can be easily performed from the inside as well as from the outside.

  According to the fourth aspect of the present invention, in addition to the effect of the third aspect, even after the external operation, when the external operation is not longer than a predetermined time, the operation is automatically switched to the internal operation. Also, the lifting / lowering adjustment of the work implement can be performed reliably.

Side view of tractor Front view of the driving part of the tractor Perspective view of the main part Fender rear perspective view Operation control block diagram The perspective view which shows the fixing means of D type pin A perspective view showing an inversion stand structure The perspective view which shows the switching structure of the storage position (A) of a front cover, and a substitute scratch position (B) Perspective view showing front cover mounting structure

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a tractor. An engine E is mounted inside a bonnet 2 at the front of the traveling vehicle body 1, and the rotational power of the engine E is transmitted to a transmission in the transmission case 3 and is decelerated by the transmission. The generated rotational power is transmitted to the front wheel 4 and the rear wheel 5. A steering handle 6 for steering the front wheels 4 and 4 is provided behind the engine E, and a driver's seat 7 is installed behind the steering handle 6.

  On the rear side of the vehicle body 1, a rotary working machine R is equipped so as to be movable up and down via a lifting link mechanism 8. The rotary work machine R moves up and down by rotating the lift arm 10 up and down via the lift cylinder 9.

  Near the steering handle 6 are installed a forward / reverse lever 11 for switching the forward / backward movement of the aircraft, a one-shot lever 12 for raising and lowering the lift arm 10 to a specified value by a one-shot operation, and the like. Further, the left side of the driver's seat 7 is provided with a main transmission lever 13 and a sub-transmission lever, and the right side of the driver's seat 7 is provided with a position lever 14 for controlling the lifting and lowering of the working machine, and the working machine can be raised to any position An internal lift switch 15 or the like that can be lowered is provided.

  Near the work machine R side of the rear part of the vehicle body, an external raising / lowering switch 16 comprising a raising switch 16U and a lowering switch 16D is provided at the rear part of the left fender or the right fender 17 as raising / lowering means for raising and lowering the lift arm 10 from outside the machine body. is set up.

  There are a one-shot lever 12, a position lever 14, a lift switch 15 and the like as internal working machine lifting / lowering means arranged near the driver's seat. These lifting / lowering means and external lifting / lowering means arranged near the working machine. 16 is set in the following relationship.

  That is, the internal lifting / lowering means, for example, the internal lifting / lowering switch 15 and the external lifting / lowering switch 16 of the external lifting / lowering means operate the lift arm 10 when the internal lifting / lowering switch 15 is operated. Is switched from an external operation to an internal operation via the control means 18, and conversely, if the external lift switch 16 is operated when the internal lift switch 15 is operated, the lift arm 10 is lifted or lowered. The related configuration is such that the operation is switched from the internal operation to the external operation via the control means 18.

  In the related configuration of the internal / external lift switches 15 and 16, when the internal operation by the internal lift switch 15 is not operated for a predetermined time (about 10 seconds) or longer, it automatically switches to the external operation, and the external lift switch 16 When the external operation is not operated for a predetermined time (about 10 seconds) or longer, the external operation is automatically switched to the internal operation.

  Further, in the configuration in which the lifting / lowering of the work implement R is switched by the lifting / lowering means on the driver's seat 7 side and the external lifting / lowering switch on the outside, the driver of the driver's seat can operate the position lever 14 to move the position lever 14 up and down. When operated, the lifting / lowering operation of the work implement is switched from the driver at the driver's seat to the operator at the external lift switch. And, when there is no operation for a predetermined time, it is configured so that the operation is switched to the driver on the driver's seat side, or in the operation switching configuration between the internal lifting means near the driver's seat and the external lifting means near the work implement side, A buzzer or lamp should be used to notify that the inside / outside operation has been switched.

  In addition, a switch button for the external lift switch is provided on the driver's seat side so that the driver can operate only with the external lift switch when the button is on, and only the internal lift means when the button is off. it can.

  When lifting and lowering the work implement from the driver's seat, a work implement lock / release combination switch is provided on the side of the external lift switch, and the PTO lever on the driver's seat cannot be used while locked. When cleaning the work implement, it is safe to prevent the driver from inadvertently driving the rotary. And a work machine does not fall suddenly, or an operator is not pinched when working between work machines. In addition, an accident caused by carelessness of the driver can be prevented in advance by disabling the adjustment dial and the travel lever on the driver's seat side during the lock. During the lock, in order to inform the driver that the work implement is being cleaned and adjusted, the position lever on the driver's seat is lit, or the external lift switch is being used on the meter panel in front of the driver's seat. An indication of something or a lamp can be turned on.

  The embodiment shown in FIG. 6 relates to a fixing means for the D-type pin attached to the housing, but the D-type pin 20 with two bolts is provided with a screw thread 21 on the pin body and attached with a nut 22. .

Further, the example of FIG. 7 relates to a method of fixing the stand 23, and has a stand configuration in which the F cover 24 is rotatably attached to the F cover 24 by a connecting pin 25 and inverted.
In the example of FIG. 8, the front cover 27 pivotally attached to the rotary cover 26 is unlocked by pulling a “t” -shaped lock lever 28 (U-shape), and the front cover 27 is held in the stowed state and FIG. 8B) is reversed and locked.

  In the example of FIG. 9, the F cover 24 is attached to the attachment plate 30 welded to the side plate 29 of the rotary cover from the side.

R Working machine 7 Driver's seat 10 Lift arm
15 Internal lift (internal lift switch)
16 External lift (external lift switch)
18 Control device

Claims (4)

  Lifting means (15) and (16) for controlling the lifting and lowering of the work machine (R) are provided near the driver's seat (7) on the inside of the machine body and near the work machine (R) on the outside of the machine body. Means (15) and (16) are configured to switch from an external operation to an internal operation when operated on the internal side during an operation on the external side.   2. The work implement lifting operation device for a work vehicle according to claim 1, wherein when the internal side operation is not operated for a predetermined time or longer, the operation side is automatically switched to the external side operation.   Lifting means (15), (16) for controlling the lifting / lowering of the work machine (R) are arranged near the driver's seat (7) inside the machine body and near the work machine (R) outside the machine body, The inside / outside elevating means (15), (16) is configured to be switched from the inside operation to the outside operation when operated on the outside side during the operation on the inside side. apparatus.   4. The work machine ascending / descending in the work vehicle according to claim 3, wherein when the external side operation by the external side lifting means (16) is not operated for a predetermined time or longer, the operation side is automatically switched to the internal side operation. Operating device.

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