JPH074Y2 - Mounting device for extension plate for ground - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a device for mounting an extension plate for ground, and is used for a rotary cover, a scraped ground plate, etc. in a rotary tiller.

(Prior art) For grounding work such as leveling, leveling, and scraping of cultivated soil surface, a folding extension plate for grounding is pivotally supported on the side of the leveling rotary cover body or the scraping grounding plate body. The connected ones are Japanese Utility Model Publication No. 56-41447 (conventional example 1), Japanese Utility Model Publication No. 5
4-24009, (Prior art example 2), JP-B-55-30244 (Prior art example 3), and the like.

(Problems to be Solved by the Invention) Conventional example 1 and conventional example 2 are connecting means by a refraction link and a spring, and when the amount of soil is large, the push-up (lifting force) against the extension plate becomes strong, In some cases, the extension plate caused a so-called floating phenomenon, resulting in poor leveling and scratching accuracy.

Since the conventional example 3 has a detachable structure using bolts or pins, the extension plate can be reliably fixed, but it takes time to attach and detach.

In addition, as in the comparative example shown in FIGS. 8 and 9, when the pin is inserted / removed, the pin insertion / removal resistance acts, and in particular, when mud or the like adheres and hardens, the pin is substantially removed. It was impossible to insert or remove.

The present invention makes it possible to change the posture easily and surely,
An object of the present invention is to provide a mounting device for an extension plate for the ground, which can surely prevent the extension plate from floating due to the levitation force acting on the extension plate.

(Means for Solving the Problems) In the present invention, a pair of front and rear brackets 45 and 46 are fixed to the side of the ground plate body 9 or the scraping ground plate body 43 at the rear end of the rotary cover 7 on the side opposite to the ground. And a pair of front and rear brackets 4 which are overlapped with the brackets 45 and 46 on the side of the extension plate 41 opposite to the ground surface.
7,48 are fixedly installed, and the brackets 45,4 of the grounding plate body 9,43 are fixed.
6 and the brackets 47, 48 of the extension plate 41 are pivotally connected by a connecting body 49 having an axis in the front-rear direction to form the extension plate 41, and a folding posture and an extension posture at the side portions of the grounding plate main bodies 9, 43. In order to achieve the above-mentioned object, the following technical measures are taken.

That is, according to the present invention, the engaging portions 50 and 51 are formed on the upper portions of the brackets 45 and 46 of the ground plate main bodies 9 and 43, respectively, and the length of the engaging portions 50 and 51 of the brackets 45 and 46 is extended. A rod body 52 having a height and having an engaging / disengaging rod body 52 in the engaging portions 50, 51, and an ammunition 53 for urging the rod body 52 in the engaging direction, the rod body 52 and the ground plate main body 9, 43 Further, a holding portion 61 for holding the rod body 52 disengaged from the engaging portions 50, 51 is provided on the brackets 45, 46 of the grounding plate main bodies 9, 43.
Is provided, and in order to prevent the extension plate 41 from floating due to the levitation force acting on the extension plate 41 in the extended posture, the engaging portion 5
It is characterized in that each of the brackets 47, 48 of the extension plate 41 is provided with contact portions 55, 56 which come into contact with the rod body 52 which is engaged over the 0, 51 from above.

(Operation) According to the present invention, in the use state of the extension plate 41 shown by the solid line in FIG. 1 and FIG.
When the levitation force F due to mud or the like acts, the extension plate 41 turns about the connecting body 49 in the direction A shown by the arrow in FIG.

In this case, the rod body 52 engaged across the engagement portions 50 and 51
A pair of front and rear brackets provided on the extension plate 41 from above.
The contact parts 55, 56 formed on the parts 47, 48 are pressed to prevent the extension plate 41 from floating.

When the extension plate 41 is folded to the side surface upper surface side of the grounding plate main bodies 9 and 43, the extension plate 41 is rotated in the direction opposite to the arrow A direction,
By opening (mouth opening) the closed portion between the hitting portions 55, 56 and the engaging portions 50, 51, the rod body 52 is pushed up against the ammunition 53 to be disengaged from the engaging portions 50, 51. Set the rod 52 in the direction B shown in FIG.
The rod 52 is engaged with the holding portion 61 and the engagement state is maintained by the bullet 53. After that, the extension plate 41
Fold in the direction of arrow A around 49.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

4 and 5 show an embodiment applied to the rotary tiller 1, which is mounted on a tractor (not shown) so as to be vertically movable by a three-point link or the like.

The cultivating device 1 includes a rotary cultivating part 4 including a claw shaft 2 and a cultivating claw 3 attached to the claw shaft 2, and a cover device 5 that covers the cultivating part 4.

The cover device 5 includes a fixed cover (main cover) 6 made of sheet metal or the like for covering the entire upper plowing width of the tilling part 4, and a movable cover (rear cover, leveling cover, etc.) 7 for covering the entire rear plowing width of the tilling part 4. And a pair of front, rear, left and right side covers 8 and the like. In the present embodiment, the cover 7 is made of a flexible elastic film body of rubber, resin or the like, so that cultivated soil or the like is less adhered and the adhered soil can be easily peeled off. The ground plate main body 9 is attached to the rear end of the cover 7 over the entire cultivation width.

The ground leveling plate body 9 is made of sheet metal or the like, and has a flat portion 9A having a grounding surface projecting and bending in the ground direction and a flat portion 9B having an inner hollow portion 9C as shown in FIG. And the rear end of the cover 7 made of a flexible elastic film is inserted into the ground plate main body 9 and attached by a fixture 10 such as bolts and nuts that are arranged in a row at a predetermined interval in the tilling width direction. The
Reference numeral 9D in FIG. 6 is a protruding ridge for preventing foreign matter from adhering to or entangled with the fixture 10 or the like, and extends over the entire length of the main body 9.

The flexible elastic film body is denoted by reference numeral 11 over the entire inner surface of the main cover 6.
It is extended as shown by.

The cover 7 may be made of a metal plate or the like that is pivotally supported at the rear end of the main cover 6 by using a refraction metal fitting or the like so as to be vertically movable.

The ground plate main body 9 is elastically applied in the ground direction by a pair of left and right holding devices 12 and is adjustable in angle.

The holding device 12 has a recess 13 formed on the upper surface of the rear portion of the main cover 6.
In addition, a support arm 14 having a substantially L shape in a side view is provided so as to be swingable in the front-rear direction by a pin or a shaft 15, and is provided in an upper end of the support arm 14 so as to be rotatable around a horizontal axis. The rod 17 is slidably inserted, and the support arm 18 on the machine frame side is also slidably inserted in another piece 19 provided so as to be rotatable around the horizontal axis, while preventing separation.
Coil springs 20 and 21 are fitted onto the rod 17 before and after sandwiching the support arm 14.

The coil springs 20 and 21 have their elastic forces adjustable on the rod 17 by the clamp metal fittings 22 and 23 with a handle that is positionally adjustable in the axial direction, and the coil springs 20 and 21 are set in a free state. It is possible to prevent the elastic force from acting.

The horizontal rod portion 24 of the support arm 14 has an inverted U-shaped cross section, and a downward pipe rod 25 is fixed to the rod portion 24. The downward pipe rod 25 has a lower end with a grounding plate. A support rod 28 pivotally supported by a pin 27 is inserted through a metal fitting 26 fixed to the flat portion 9B of the main body 9 so as to be adjustable for expansion and contraction. The clamp member 29 attached to the downward cylinder rod 25 is engaged with and disengaged from the hooking portions 28A formed on the support rod 28 at predetermined intervals, so that the extension and contraction can be fixed.

Here, by adjusting the expansion and contraction of the support rod 28, the front-rear distance between the tilling part 4 and the ground plate main body 9 can be freely changed according to the work situation, and the strength of the coil springs 20 and 21 in the clamp fittings 22 and 23 can be adjusted. The ground pressure is adjustable.

Further, a metal fitting 30 is fixedly mounted on the flat portion 9B, and a bifurcated yagura metal fitting 32 is pivotally supported on the metal fitting 30 by a pin 31, and a support rod 28 is vertically inserted into the yagra metal fitting 23. A pair of pins 33 are projected from the supporting rod 28 in the left-right direction, and an angle adjusting hole 34 is formed in the yagura metal fitting 32 so that the pin 33 can be engaged and disengaged, as shown in FIG. By selectively engaging the pin 33 with the engaging portion 34A of the adjusting hole 34, the angle of the ground plate main body 9 can be changed. In addition, the yagura metal fitting 32 is biased so that the engaging portion 34A is engaged with the pin 33 by the temple winding spring 35 wound around the pin 31, and the yagura metal fitting 32 is provided with an operation portion 36 for releasing the engagement. Have. The operating portion 36 may be attached to the individual yagura metal fittings 32, but a pair of left and right yagura metal fittings 32 may be connected to each other by a material.

When the rotary cover 7 is formed of an elastic film body, the cover 7 may sag due to adjustment of the ground plate main body 9 or the like. Therefore, the metal fitting 37 and the rod portion attached to the upper surface of the elastic film body may be included.
A coil spring 38 is stretched over 24. In FIG. 5, reference numeral 39 denotes a rake rod, which acts as a sieve when the tiller 4 is rotated in the upcut direction, and is arranged in rows at a predetermined interval in the tiller width direction.

From the viewpoint of erasing the side transmission case 40, dozer (dirt), scraping, etc., the extension plate 41 is provided on the side portion of the ground plate main body 9 with the axial center in the front-back direction as a fulcrum, as shown in FIG. It is provided so that it can be folded.

FIG. 7 shows a rotary tiller 1, which is provided with a scraping ground plate main body 43 via a pair of left and right pulling rods 42. In FIG. 7, reference numeral 44 is an ammunition holding device.

An extension plate 41 is extended to both or one of the left and right side portions of the grounding plate body 9 shown in FIGS. 4 and 5, and to both or one of the left and right side portions of the body 43 shown in FIG. Board 41
It is provided so as to be foldable by the means shown in FIGS. 1 and 2.

In FIGS. 1 and 2, a pair of front and rear brackets 45, 46 is vertically fixed to the side of the main body 9, 43 (hereinafter, the main body 9 is representatively illustrated) on the side opposite to the ground contact surface.

In addition, a pair of front and rear brackets are provided on the side of the extension plate 41 opposite to the ground surface.
47 and 48 are fixed upright, and brackets 45 and 46 of the main body 9
And the brackets 47 and 48 of the extension plate 41 are overlapped with each other and are pivotally connected by a connecting body 49 having an axial center in the front-rear direction.

Engagement portions 50 and 51 formed by recesses are formed on the upper portions of the brackets 45 and 46 of the main body 9 at the same height position so that the axial centers of the front and rear directions are aligned with each other. A rod body 52 having a length straddling the above is provided so as to be disengageable across the engaging portions 50 and 51.

The rod 52 is connected to one end of an ammunition machine 53 shown by a coil spring.
The other end of 53 is connected to a metal fitting 54 attached to the main body 9, and a rod body 52 engaged with the engaging portions 50 and 51 is stretched here.

The engaging portion 5 is attached to the brackets 47 and 48 of the extension plate 41 in the extended posture.
There are formed contact portions 55 and 56 which are engaged with the rods 52 which are engaged with the rods 52 and which are engaged with the ammunition 53 from above, and the corresponding portions 55 and 56 are the engaging portions 50. It is formed as an upward concave portion for holding the rod body 52 in cooperation with the and 51. Therefore, the extension plate
Even if the extension plate 41 tries to rotate in the direction A shown by the arrow in FIG.
Is pressed against the rod 52 to prevent its rotation (lifting).

A coil spring 57 is stretched between the extension plate 41 and the main body 9 to urge the extension plate 41 in the extended posture.

Further, the inner wall 41A of the extension plate 41 and the outer wall 9E of the main body 9 have a skimmer 58, which is closed by a blindfold plate 59 made of an elastic plate or the like shown by phantom lines in FIG. The blindfold plate 59 is superposed on the ground surface side of the main body 9 and contributes to maintain the extended posture of the extension plate 41.

The contact portions 55 and 56 pressed against the rod body 52 from above can be opened within the range of the clearance 58, and the rod body 52 can be disengaged from the engagement portions 50 and 51 by this opening. .

Therefore, in order to fold the extension plate 41, the extension plate 41 is pushed down in the direction opposite to the arrow A (at this time, since the blindfold plate 59 is elastically deformed, the pushing down is allowed within the clearance 58), Contact part 55,5
6 is opened to disengage the rod body 52 from the engaging portions 50 and 51,
52 is moved in the direction of arrow B along the guide portion 60, and is engaged and held by a holding portion 61 formed on the base portions of the brackets 45 and 46 through a bullet pulling by a bullet 53.

After that, when the extension plate 41 is lifted (rotated) around the connecting body 49 in the direction of the arrow A, and the spring 57 exceeds the position of the connecting body 49, unstable switching is performed, and the extension plate 41 is placed on the main body 9. Can be folded into

It can be folded onto the body 9.

In addition, in the above-described embodiment, the bullets 53 may be provided in pairs.

Further, as shown in FIG. 5, the grounding plate main body 9 is held in a substantially vertical posture with respect to the ground, and an extension plate is provided on a side portion of the main body 9.
When the 41 is extended, the dozer work can be performed by the main body 9 or the like.
Is curved so as to project backward as shown.

Then, at the time of vertical adjustment and angle adjustment of the leveling plate 9 according to the working situation, the coil springs 20 and 21 are made free (free state) by loosening the clamp fittings 22 and 23 and sliding on the rod 17. You can also

(Comparative Example) FIGS. 8 and 9 show a comparative example, in which members corresponding to those of the example of the present invention are denoted by "dash".

The connecting body 49 'has a coil spring 49A in this axial length, and a hook portion 49B is formed at one end to integrally have a lock pin 49C.

An arcuate guide hole 60 'is formed in one of the brackets 45' and 47 ', and a lock pin 49C is inserted into a guide hole 60' in the pin insertion hole formed in the other bracket by a spring 49A. The extension plate 41 'holds the extended posture here.

To fold, pull the hook portion 49B against the spring 49A in the direction of the arrow shown in FIG. 8, rotate the extension plate 41 'around the connecting body 49', and also use the lock pin 49C for earth pressing. Positioning hole 6
Relock to 1 '.

In this comparative example, it is difficult to align the lock pin 49C with the positioning hole 61 'and the like.

(Effects of the Invention) According to the present invention, each bracket 4 of the ground plate main body 9, 43 is
Engagement portions 50, 51 are formed on the upper portions of 5, 46, and have a length that extends over the engagement portions 50, 51 of the brackets 45, 46 and can be engaged with and disengaged from the engagement portions 50, 51. A bar body 52, and an ammunition 53 for urging the bar body 52 in the engaging direction is provided by connecting the bar body 52 and the ground plate main bodies 9 and 43. A holding portion 61 for holding the rod body 52 disengaged from the engaging portions 50, 51 on the brackets 45, 46 of 43.
The engaging portions 50, 5 are provided to prevent the extension plate 41 from floating due to the levitation force acting on the extension plate 41 in the extended posture.
Since the hitting portions 55 and 56 that come into contact with the rod body 52 that is engaged over 1 from above are provided on the brackets 47 and 48 of the extension plate 41, the rod body is resistant to the ammunition. To engage and disengage from the engaging part, and the extension plate is prevented from floating when engaged.
When detached, the extension plate is allowed to rotate. Therefore, the folding of the extension plate is very simple.

Further, since the rod body is elastically pulled by the ammunition machine and engaged with the holding portion, the rod body will not be lost in the folded state of the extension plate.

[Brief description of drawings]

The drawing shows the present invention and a comparative example, FIG. 1 is a plan view of a main part of the embodiment of the present invention, FIG. 2 is a rear view of the same, showing the operation together, and FIG. 3 is a side view of an extension plate, FIG. 4 is a side view of a rotary cultivator to which the present invention is applied, FIG. 5 is a side sectional view of the same, FIG. 6 is a side sectional view showing a mounting portion of a ground plate main body in detail, and FIG. 7 applies the present invention. FIG. 8 is a side view of the scraping device, FIG. 8 is a plan view of a comparative example, and FIG. 9 is a rear view of the same. 7 ... Rotary cover, 9,43 ... Grounding plate body, 45,46,47,48
... Bracket, 49 ... Coupling body, 50,51 ... Engaging portion, 52 ... Bar body, 55,56 ... Abutting portion.

Claims (1)

[Scope of utility model registration request] 1. A pair of front and rear brackets (45) (46) are fixed on the side of the ground plate main body (9) or the scraping ground plate main body (43) at the rear end of the rotary cover (7) on the side opposite to the ground contact surface. The bracket (45) (4) is installed on the side of the extension plate (41) opposite the ground contact surface.
A pair of front and rear brackets (47) (48) that are overlapped with 6) are fixedly installed, and the brackets (45) (46) of the ground plate main body (9) (43) and the bracket (47) of the extension plate (41) are fixed. (48)
The extension plate (41) can be freely changed into a folding position and an extension position by the side portions of the ground plate main bodies (9) and (43) by pivotally connecting and with a connecting body (49) having a longitudinal axis. The brackets (45) (4) of the grounding plate body (9) (43)
Engagement parts (50) (51) are formed on the upper part of 6),
The bracket (45) (46) is provided with a rod body (52) having a length that extends over the engaging portions (50) (51) and detachable from the engaging portions (50) (51). An ammunition (53) for urging the rod body (52) in the engaging direction is provided by being connected to the rod body (52) and the ground plate main bodies (9) (43), and further, the ground plate main body ( 9) (43) bracket (45) (4
A holding portion (61) for holding the rod body (52) disengaged from the engaging portions (50) (51) is provided in 6), and the levitation force acting on the extension plate (41) in the extended posture. With the extension plate (41)
The contact portions (55) (56) that come into contact with the rod body (52) that is engaged over the engaging portions (50) (51) from above are extended to prevent the floating of the An installation device for an extension plate for ground, which is provided on each bracket (47) (48) of a plate (41).