JPH0713442Y2 - Stand device for cultivator - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a stand device in a tiller which is connected to a rear portion of a tractor.

[Conventional technology]

Since the work of attaching and detaching the tiller to the tractor requires a great deal of labor and labor, the attachment and detachment of the tiller is now fully automated, including the connection and disconnection of the drive shaft, and requires no manual work by the operator. It has become possible to attach and detach while sitting on the tractor seat. However, when automatically connecting the tractor and the tiller, it is necessary to keep the posture of the tiller as horizontal as possible.Therefore, attach the stand to the toolbar of the tiller to place the tiller in the horizontal position. Hold on.

[Problems to be solved by the device]

However, even if the operator can attach and detach the tilling implement while sitting on the seat of the tractor, the operator must descend from the tractor and manually perform the removal of the stand.

The present invention has been made in view of the above problems, and an object thereof is to improve it.When attaching or detaching a tilling implement, the stand can be lowered by one-touch operation, and the operator can sit on the seat of the tractor. It is an object of the present invention to provide a stand device in a tilling machine in which the stand is released and the work can be immediately put into operation without being separated from the seat after being connected.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a tool bar of a cultivator with a stand with a saw-tooth groove engraved vertically and slidably and with a spring constantly urged upward. An engaging piece that engages with the saw-toothed groove to allow the stand to descend and to prevent the stand from rising is always urged in the engaging direction by a spring so that the stand engages with the engaging piece. The stand device in the tilling machine is characterized in that the stand can be engaged with and disengaged from the saw-toothed groove.

[Action]

To lower the stand and hold the tiller in a horizontal position, the stand is pushed down by hand, and the engaging piece that allows the stand to be lowered is pushed back by the serrated groove and the stand is lowered. Then, when pushing down of the stand is stopped, the stand is prevented from rising by the engaging piece and stopped at that position. Therefore, the plowing implement can be held in the horizontal posture only by pushing down the stand to a position where the tilling implement takes the horizontal posture.

Then, the operator sits on the seat of the tractor, retracts the tractor, and automatically connects the tiller to the rear part of the tractor. However, if you disengage the engaging piece that prevents the stand from rising by remote control with a wire etc. while sitting on the seat, the stand will automatically rise due to the restoring force of the compressed spring when descending. Once released, the operator can continue working without leaving the seat.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

In FIG. 1, 1 is a tractor, 2 is a cultivator, which is connected to the rear of the tractor 1 via a 4-point hitch device 3, 4
Is a stand device according to the present invention mounted on the tool bar 5 of the tiller 2.

As shown in FIGS. 2 to 4, the stand device 4 has a stand 6 made of steel rod or the like vertically slidably erected at the center of a tool bar 5, and the stand 6 has an inclined surface on one side of its outer circumference. The sawtooth groove 6a on the upper side is carved in a predetermined range in the axial direction, and the extension spring 7 is fitted above the tool bar 5.
The upper portion of the extension spring 7 is fixed to the upper portion of the stand 6 by a snap pin 9 via a washer 8, and the stand 6 is constantly given a rising force.

On the other hand, a U-shaped bracket 11 is welded to the lower surface of the tool bar 5 in the vicinity of the stand 6, and an engaging piece 1 having a single-edged shaped engaging portion 11a with the inclined surface facing upward is formed on the tip of the bracket 10.
1 is slidably supported, and one end of the engaging piece 11 is urged by a tension spring 12 hooked on the tool bar 5 to engage the engaging portion 11a at the tip with the serrated groove 6a of the stand 6. There is.

13 is an operation wire for remote operation for releasing the engagement piece 11,
The outer end of the operation wire 13 on the side of the stand 6 is fixed to the bracket 14 welded to the tool bar 5 at a position close to the engaging piece 11, and the inner part is attached to the vertical portion of the engaging piece 11 by a stopper 15 so that the inner length of the operating wire 13 is increased. Adjustably fastened. The operation end of the operation wire 13 is a top link mast of the tiller 2
An outer is fixed to a bracket 17 welded to 16, and a puller 18 is provided on the inner so that an operator can operate a wire while sitting on the seat of the tractor 1.

In the above-mentioned stand device, when the cultivator 2 is first connected to the tractor 1, when the stand 6 is pushed down by hand, the single-edged engaging portion 11a of the engaging piece 11 with the slope facing upwards causes the slope of the stand 6 to rise. Is pushed back by the saw-toothed groove 6a having the upper side thereof and the stand 6 descends, and at the same time, the extension spring 7 of the stand 6 is compressed. When the pushing down of the stand 6 is stopped, the stand 6 is engaged with the engaging portion 11 of the engaging piece 11 which is constantly urged by the tension spring 12 in the engaging direction.
The engagement between the lower flat surface portion of the a and the upper flat surface portion of the sawtooth groove of the stand 6 prevents the ascent and stops at that position. Therefore, the stand 6 is applied only by pushing the stand 6 down to a position where the tiller 2 is in a horizontal position, and the tiller is held in a horizontal position.

Then, the operator sits on the seat of the tractor 1, lowers the 4-point hitch device to retract the tractor 1, and raises the 4-point hitch device at the connecting position, whereby the tiller 2 is automatically connected to the tractor 1. When the puller 18 at the operating end of the operating wire 13 is pulled after the plowing work implement 2 is connected, the inner end of the operating end interlocks to pull the engaging piece 11 to pull out the serrated groove 6a of the stand 6.
To disengage from. Therefore, the stand 6 is lifted by the restoring force of the compressed spring 7 to release the stand, so that the operator can directly start working without leaving the seat.

In order to disconnect the tillage implement 2, first, the stand 6 is pushed down to prevent the tiller 2 from falling when the implement is separated. Therefore, if the release lever of the 4-point hitch device is opened and the 4-point hitch device is lowered, 4 The connecting portion of the point hitch device is disengaged, and if the tractor 1 is then moved forward, the tiller 2 is automatically disconnected.

5 to 7 do not use a separate device such as a stand,
1 is a plan of a fall prevention device for a tilling implement that prevents the tilling implement from falling when separated.

The device of the present invention will be described below with reference to the drawings. In the drawing, 20 is a tilling implement connected to a tractor via a three-point link 21, 22 is a rotary cover that covers the upper part of a tiller 23,
24 and 24 'are upper and lower 2 hinged to the rear part of the rotary cover 22.
25 is a rod for supporting the upper rear cover, 26 is a rod support fitting for changing the support position of the rod 25 to change the angle of the upper rear cover 24, and 27 is a lower rear cover 24 'by a pressure spring 28. A pressing rod that presses the upper part of the upper rear cover 24 is slidably penetrated by a bracket 29 welded to the upper rear cover 24, and a lower end of the lower cover is pivotally supported by a guide piece 31 rotatably supported around a bolt 30. It is worn.

Reference numeral 32 denotes a fall prevention device of the present invention, in which both parallel sides of a U-shaped stopper 33 are rotatably attached to the bolt 30, and the upper surface prevents the vertical swing of the pressure rod 27. The fall prevention device (solid line in FIG. 6) and the work position (dotted line in FIG. 6) allowing the vertical movement of the pressure rod 27 by retracting the upper surface can be switched. That is, the stopper 33 is provided with the pin hole 34, and the pin hole 3 of the fall prevention device in which the pin hole of the stopper 33 is provided in the bracket 29.
Insert the pin according to 4'or turn the stopper 33 to move the pin hole 34 to the pin hole 3 at the working position of the bracket 29.
Switching is possible by inserting pins according to 4 ".

Instead of replacing the pin 34, as shown by the chain double-dashed line in FIG. 6, a lever 35 is provided on the stopper 33 and this lever is connected to the working end of the operation wire 36, and the operation end of the operation wire 36 is connected to the tractor. It is also possible to remotely control the stopper 33 from the seat so as to switch between the fall prevention device and the working position. Reference numeral 35 is a restoring spring of the stopper 33 when operating the wire.

When separating the tiller 20 from the tractor, lower the rear cover 2 by raising the three-point link and lifting the tiller 20.
The pressure rod 27 also moves down together with 4 '. Stopper 3 in this state
The pin is inserted into both the stopper 33 and the pin holes 34, 34 'of the bracket 29 by using 3 as a fall prevention device. In the case of wire operation, if the locking of the operation end of the operation wire 36 pulled by the seat of the tractor is released, the stopper 33 returns to the fall prevention device by the restoring force of the spring 35.

Next, the length of the pressure rod 27 is adjusted according to the condition of the ground and supported by the rod support metal fitting 26 to fix the upper rear cover 24 at a required angle. Then, when the tiller 20 is lowered, the connecting portion of the three-point link is removed, and the tractor is moved forward, the tiller is disconnected.

Here, since the pressure rod 27 is prevented from vertically swinging on the upper surface of the stopper 33, the upper and lower rear covers 24 and 24 'are in a fixed state to support the rear part of the tiller 20 and prevent its fall. .

When starting the work, the cultivator 20 is connected to the tractor, the pin inserted into the pin hole 34 ′ of the fall prevention device of the bracket 29 is pulled out, the stopper 33 is tilted, and the upper surface thereof is above the pressure rod 27. If the pin is replaced by aligning the pin hole 34 ″ of the stopper 33 with the pin hole 34 ″ at the working position of the bracket 29 and replacing the pin, the pressure rod 27 can be swung up and down to be in the working position. In the case of wire operation, Operation wire in the tractor seat
When the operation end of 36 is pulled and locked in the pulling position, the stopper 33 can be rotated to the working position in the same manner as described above.

That is, according to the fall prevention device of the present invention, it is possible to prevent a fall of the tiller at the time of separation by simply incorporating a very simple device into the rear cover without using a separate device such as a stand.

[Effect of device]

As described above, the stand device for the tiller according to the present invention is such that the stand having the serrated grooves is vertically slidable on the toolbar of the tiller and is constantly biased upward by the spring. Upright, the saw-toothed groove of the stand is engaged with it to allow the stand to descend,
The engaging piece that prevents the rising is always urged in the engaging direction by the spring to engage with the engaging piece, and the engaging piece can be engaged with and disengaged from the serrated groove of the stand by remote control. When attaching / detaching the tiller, the stand is applied by simply pressing down the stand to obtain the horizontal posture of the tiller, and the stand can be released by the operator while sitting on the tractor seat. Combined with the complete mechanization of desorption, the labor saving and efficient desorption work of the tiller is promised.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a rear perspective view of a tilling implement to which the present invention is applied, and FIG. 2 is a rear view of a stand device of the present invention when the stand is released. 3, FIG. 3 is a view taken along the line AA of FIG. 2, and FIG. 4 is a rear view of the stand device when the stand is used. 5 to 7 show a plan of a fall prevention device at the time of detaching the tilling work machine, FIG. 5 is a side view of the tilling work machine to which the device of the present invention is applied, and FIG. 6 is a side view of the device of the present invention, FIG. 7 is a rear view of the same device. 2 ... Tillage implement, 4 ... Stand device, 5 ... Toolbar, 6 ... Stand, 6a ... Serrated groove, 7 ... Extension spring, 11 ... Engaging piece, 12 ... Tension spring, 13
...... Operation wire.

Claims (1)

[Scope of utility model registration request] 1. A stand having a serrated groove is vertically slidable on a toolbar of a cultivator and vertically erected by a spring so that the stand has a serrated groove. , The engagement piece that engages with this and allows the stand to descend, and that prevents the stand from rising is always urged by a spring in the engagement direction to engage, and the engagement piece is remotely operated by A stand device in a tilling machine, which can be engaged with and disengaged from a serrated groove.