JP2514259B2 - Flap cover attachment device for cultivator - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for attaching a flap cover to a lower end of a rear cover of a cultivator.

(Prior Art) FIG. 8 relates to a conventional example, and a flap cover 114 is swingably attached to the left and right lateral shafts 115 at the lower end of a rear cover 112 that covers the rear of the cultivating portion of a rotary cultivator. At the rear end of this flap cover 114, the arm 140 has a horizontal support shaft.
It is mounted swingably around the center. Further, the rear cover 112 is formed with a plurality of pin holes 142. Then, the positioning pin 143 is inserted into the arm 140 on the side of the flap cover 114 and the pin hole 142 on the side of the rear cover 112, and the retaining pin (not shown) prevents the flap cover 114 from being positioned at a plurality of swinging positions. It is possible.

The horizontal shaft 115 is attached to the rear cover 112 side, and at the front end of the flap cover 114, a hook 144 for hooking the horizontal shaft 115 is provided.
Are formed. And the horizontal axis 115 and the hook 1
A lock pin 145, which holds the horizontal shaft 115 with the hook 144, is detachably attached to the flap cover 114 in order to restrict the disengagement from the hook 44 with the hook 44. The lock pin 145 is urged by the spring 146 in the inserting direction, and is pulled out against the spring 146 to release the latch.

(Problems to be Solved by the Invention) In the above conventional one, the rear cover 112 and the flap cover 1 are
14 is rattling at three positions of the horizontal shaft 115, the horizontal support shaft 141, and the positioning pin 143, and noise is large.

Further, the flap cover 114 is attached and detached by inserting and removing the lock pin 145, inserting and removing the positioning pin 143, and the positioning pin 1.
43 retaining pin It was necessary to insert and remove this pin, which was very troublesome. In addition, each of these pins is located at left and right positions, and it is difficult to insert and remove them at the same time. Further, changing the position of the flap cover 114 is also troublesome because it is necessary to insert and remove the positioning pin 143 and its retaining pin.

 The present invention aims to solve the above problems.

(Means for Solving the Problem) A feature of the present invention is that a flap cover 14 is swingably attached to the center of the horizontal shaft 15 at the lower end of a rear cover 12 that covers the rear of the tiller 10, and then the cover is provided. In the cultivator in which the flap cover 14 can be positioned at a plurality of swinging positions by inserting the positioning pins 27 on the 12 side and the flap cover 14 side, the horizontal cover is provided on one of the rear cover 12 and the flap cover 14. The shaft 15 is attached, the other side is provided with an engaging portion 24 that can be engaged with and disengaged from the horizontal shaft 15, the flap cover 14 is provided with a pair of left and right holding portions 20, and each of the holding portions 20 is provided with a lever 28.
Is attached so that it can swing and can be grasped simultaneously with the holding portion 20, the positioning pin 27 is attached to the lever 28, and a spring 37 for urging the lever 28 in the inserting direction of the positioning pin 27 is provided. It is in the point provided.

(Operation) In the above structure, when attaching the flap cover 14 to the rear cover 12, the pair of left and right holding portions 20 and the lever 28 are simultaneously gripped. At this time, the lever 28 is held in a swinging state against the elastic force of the spring 37.

Next, the flap cover 14 is positioned at the lower end of the rear cover 12, and the horizontal shaft 15 is engaged with the engaging portion 24.

Next, if the flap cover 14 is swung about the horizontal axis 15 to the desired position, the lever 28 is released and the positioning pin 27 is inserted into both the rear cover 12 side and the flap cover 14 side. It will be in the state where it did.

To change the position of the flap cover 14, hold the left and right holding portions 20 and the lever 28 at the same time, remove the positioning pin 27, and swing the flap cover 14 around the horizontal axis 15 to the desired position. It is sufficient to release the grip of 28 and insert the positioning pin 27.

The flap cover 14 may be removed in the reverse order of the above-mentioned attachment.

(Example) Hereinafter, the Example of this invention is described with reference to drawings.

The side-drive rotary cultivator 1 shown in FIG. 4 is towed by a non-illustrated agricultural tractor and has a gear case 2
And a support arm 3 protruding left and right from the gear case 2 form a machine frame, and a mast 4 for coupling with a tractor, a gauge device 5, etc. are attached to the machine frame.

A chain case 6 is attached to one end of the support arm 3.
However, a side frame (not shown) is attached to the other end. A pawl shaft 7 is supported by the chain case 6 and the side frame, and a tilling pawl 8 is attached to the pawl shaft 7.

Then, the power receiving shaft 9 protruding forward from the gear case 2
Is connected to the PTO shaft of the tractor, and the power of this PTO shaft is transmitted through the power receiving shaft 9, the gear in the gear case 2, the transmission shaft in the support arm 3, and the chain winding transmission device in the chain case 6 to the pawl shaft 7. And the pawl shaft 7 rotates to form a tilling part 10 for tilling with the tilling claw 8.

Above the cultivating part 10 is a main cover 11 attached to the machine frame.
An upper end of a rear cover 12 that covers the rear of the cultivating part 10 is swingably attached to the rear end of the main cover 11. The rear cover 12 is made of sheet metal, and a space 17 is formed at the lower end by folding back the sheet metal, and the folded end 18 is located on the front surface side of the rear cover 12 and has a good appearance. A side cover 13 covers the sides of the cultivating part 10.

Then, as shown in FIGS. 1 and 2, the rear cover 12
At the lower end of the flap cover 14, a flap cover 14 is swingably attached to the center of the horizontal axis 15 of the left and right axis. The flap cover 14 is made of sheet metal, and the left and right widths thereof are substantially the same as the rear cover 12, and a space 16 is formed at the lower end by folding the sheet metal. Also,
A cover 38 for scraping is detachably attached to the flap cover 14 with bolts and nuts 39.

A pair of left and right holding portions 20 are attached to the upper surface of the flap cover 14. Each holding portion 20 is formed by opposing walls 21 and 22 and a connecting wall 23 thereof, and the flap cover 14 can be held by gripping the lower end side.

The horizontal shaft 15 is supported by the facing wall 21 and the facing wall 22 of each holding portion 20, and the rear cover 12 is provided with an engaging portion 24 with which the horizontal shaft 15 is detachably engaged. This engaging part
24 is a pair of left and right brackets attached to the rear cover 12.
It is formed by forming the lower end of 25 into an arc shape that opens downward.

Each of the brackets 25 has a wall 21 facing the holding portion 20.
And a facing wall 22, and a plurality of pin insertion holes 26 are opened in an upper portion thereof so as to be arranged in parallel on a circumference concentric with the horizontal shaft 15. A positioning pin 27 that can be inserted into and removed from the pin insertion hole 26 is attached to a lever 28 attached to the holding portion 20.

That is, the lever 28 is a support piece attached to the holding portion 20.
29 is attached to the center of the support shaft 30 of the left and right axis so that it can swing freely.
In addition, the holding part so that it can be gripped at the same time as the holding part 20.
The shape is along the lower end side of 20. The lever 28 is formed of left and right facing side walls 31, 32 and an upper wall 33, and the positioning pin 27 is mounted between the front ends of the facing side walls 31, 32 so as to be rotatable relative to the center of a pivot shaft 34 of the left and right axial centers. ing. As a result, when the lever 28 swings in the direction of arrow A in FIG. 1, the positioning pin 27 moves in the insertion direction into the pin insertion hole 26, and when the lever 28 swings in the direction of arrow B, the positioning pin 27 moves.
27 moves in the direction of removal from the pin insertion hole 26. In order to guide the positioning and movement of the positioning pin 27 with respect to the flap cover 14 side, a guide cylinder 35 is formed in the holding portion 20,
A positioning pin 27 is slidably inserted into the guide cylinder 35 via a sleeve 36.

A spring 37 for urging the lever 28 in the direction of arrow A, that is, in the insertion direction of the positioning pin 27 into the pin insertion hole 26 is engaged with the support piece 29 and the lever 28.

It should be noted that each pin insertion hole 26 is a long hole that is long in the left-right direction and is capable of absorbing an error in manufacturing or assembling.

In the above configuration, in order to change the relative angle of the flap cover 14 with respect to the rear cover 12, the holding portion 20 and the lever 28 are simultaneously gripped, and the lever 28 is swung in the direction of arrow B against the elastic force of the spring 37. By doing so, the positioning pin 27 is pulled out from the single pin insertion hole 26. In this state, flap cover 14
When the lever 28 is swung about the horizontal axis 15 to have a desired relative angle with respect to the rear cover 12, the grip of the lever 28 is released. Then, the lever 28 swings in the direction of arrow A by the elastic force of the spring 37,
The positioning pin 27 is inserted into another pin insertion hole 26, and thereby the flap cover 14 is positioned with respect to the rear cover 12.

To attach and detach the flap cover 14 to the rear cover 12,
The horizontal shaft 15 may be disengaged from the engaging portion 24 while holding the holding portion 20 and the lever 28 and swinging the lever 28 in the direction of the arrow B to remove the positioning pin 27 from the pin insertion hole 26. .

The horizontal shaft 15 may be provided on the rear cover 12 side, and the engaging portion 24 may be provided on the flap cover 14 side.

(Comparative Example) FIGS. 5 to 7 relate to a comparative example of the present invention, in which a rear cover is used.
A flap cover 51 is attached to the lower end of 50 so as to be swingable about a horizontal axis 52 which is the center of the left and right axes. This attachment is performed at two positions on the left and right, and although one of the left and right is shown in the figure, a pair of left and right facing plates 53, 54 are attached to the outer surface of the rear cover 50.
A handle 55, which is inserted between 3, 54, is attached to the flap cover 51, and the horizontal shaft 52 is inserted between the facing plates 53, 54 and the handle 55, so that the flap cover 51 is attached to the rear cover 50. Horizontal axis
52 It is possible to swing around the center. A retaining pin 56 is inserted through the insertion end of the horizontal shaft 52.

Further, the flap cover 51 can be positioned with respect to the rear cover 50 at a plurality of swinging positions, so that the handle 55 has a pin insertion hole.
A plurality of openings 57 are provided so as to be arranged in parallel on the circumference concentric with the horizontal axis 52, and positioning pins 58 that can be inserted into and removed from the pin insertion holes 57 are attached to the counter plate 53.

That is, the tubular body 59 and the through hole 60 are attached to the facing plate 53, the positioning pin 58 is inserted into the tubular body 59 and the through hole 60 so as to be movable left and right, and the positioning pin 58 is provided outside the tubular body 59. A handle 63 located at is formed. Further, a flange 61 is formed on the positioning pin 58, and the flange 61 and the cylindrical body are
A spring 62 that engages with 59 is inserted into the cylinder 59, and the spring 62
As a result, the positioning pin 58 is biased in the insertion direction into the pin insertion hole 57. Further, a cutout 64 is formed in the tubular body 59,
The notch 64 has a guide portion extending in the left-right direction and a hooking portion extending in a direction orthogonal to this portion. Hooking pins 65, which are inserted into the notches 64 so as to be relatively movable, are attached to the positioning pins 58.

A rod 67 that presses the rear cover 50 in the ground contact direction by the elastic force of the spring 66 is connected to the facing plates 53 and 54 by a pin 68 having a horizontal axis.

If the relative angle of the flap cover 51 to the rear cover 50 is changed and adjusted in the configuration of the comparative example, the positioning pin
Pull out 58 from one pin insertion hole 57 against the elastic force of spring 62. At this time, the latch pin 65 moves in the guide portion along the left-right direction of the notch 64. Next, by rotating the positioning pin 58, the hooking pin 65 is hooked on the hooking portion of the notch 64, and the positioning pin 58 is held in a state of being pulled out from the pin insertion hole 57. Next, when the flap cover 51 is held and swung about the horizontal axis 52 to have a desired angle with respect to the rear cover 50, the positioning pin 58 is rotated to form the hooking pin 65 and the hooking portion of the notch 64. Of the positioning pin 58 and the different pin insertion holes
Insert in 57. As a result, the relative angle of the flap cover 51 is changed.

To remove the flap cover 51 from the rear cover 50, hold the positioning pin 58 from the pin insertion hole 57 in the same manner as above with the engagement of the retaining pin 65 and the notch 64, and then retain it from the horizontal shaft 52. The pin 56 is removed and the horizontal shaft 52 is removed from the facing plate 53 and the handle 55, and the mounting is performed in the reverse order of the removal.

According to the comparative example, since the flap cover 51 and the rear cover 50 are connected at the two positions of the horizontal shaft 52 and the positioning pin 58, there is rattling or rattling compared to the conventional three position connection. Noise can be reduced. However, attachment / detachment and positioning of the flap cover 51 with respect to the rear cover 50 require more labor than those of the present invention.

(Effect of the Invention) According to the present invention, since the rear cover and the flap cover are connected by the two members of the positioning pin on the horizontal axis, the rattling noise is smaller than that which is conventionally connected by three members.

Further, when the flap cover is attached to or detached from the rear cover or the swing position is changed, the rear cover and the flap cover can be engaged with each other via the horizontal axis and the engaging portion, and the left and right holding portions of the flap cover can be engaged. Since the holding via the lever and the insertion / removal of the positioning pin via the lever can be performed at the same time, it can be performed very easily.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a flap cover attaching device according to an embodiment of the present invention, FIG. 2 is a sectional view of the same, and FIG.
FIG. 4 is a side view of the cultivator, FIG. 5 is a side view of a flap cover attaching device according to a comparative example, and FIG. 6 is a plan view of the same.
FIG. 8 is a partial sectional view of the same, and FIG. 8 is a side view of a flap cover attaching device according to a conventional example. 10 ... Tillage section, 12 ... Rear cover, 14 ... Flap cover, 15 ...
Horizontal axis, 20 ... holding part, 24 ... engaging part, 27 ... positioning pin, 28
… Lever, 37… spring.

Claims (1)

(57) [Claims] 1. A rear cover (12) for covering the rear of the tiller (10).
The flap cover (14) is swingably attached to the lower end of the horizontal axis (15), and then the positioning pin (27) is inserted into the cover (12) side and the flap cover (14) side. In a cultivator in which the flap cover (14) can be positioned at a plurality of swing positions, the horizontal shaft (15) is attached to one of the rear cover (12) and the flap cover (14), and the other side thereof is attached to the horizontal shaft (15). Engagement part (24) that can be engaged and disengaged with the shaft (15)
And a pair of left and right holding parts (20) are provided on the flap cover (14), and levers (28) are provided on the respective holding parts (20).
Is attached so that it can swing and can be grasped simultaneously with the holding portion (20), the positioning pin (27) is attached to the lever (28), and the lever is arranged in the inserting direction of the positioning pin (27). A flap cover attachment device for a cultivator, comprising a spring (37) for urging the (28).