JPH0112590Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a device for separating entangled stem culms in a stem culm reaper used for reaping stem culms of grass such as rush while untangling the stem culms from each other.

The stem culm reaper is equipped with a dividing rod that enters between the cultivation rows of adjacent planted stem culms in order to separate the stem culms from uncut side stem culms when harvesting the stem culms. However, in the case of rice and wheat, the culms of these plants are clearly separated, and therefore there is little intertwining of the stem culms, and the remarkable effect of the above-mentioned dividing rod can be expected, but in the case of the above-mentioned rice and wheat, the culms of these plants are clearly separated. For types of stem culms that are not clearly distinguished, a swinging rod is used because the culms are heavily entangled with each other and the above-mentioned dividing rod alone cannot unravel the entanglement well. . The swinging rod is installed in an inclined manner on the front part of the machine body of the stem culm reaper, and swings back and forth in the left-right direction of the machine body using its leading lower end as a swinging fulcrum.
The contact impact pressure of the swinging rod that accompanies this swing unravels the entanglement of the stem culm, and in order to adjust the contact impact pressure according to the degree of entanglement of the stem culm, the swing center position of the swinging rod is adjusted to the machine body. It is usually configured to be variable in the left and right directions.

However, with this conventional structure, even if the contact impact pressure can be changed, the length of the swinging rod and the installation angle are constant, so it is difficult to adapt it to crop conditions. For example, even if the degree of entanglement of the stem culms is the same, if the stem culm length changes or the degree of stem inversion changes, the entanglement cannot be properly loosened simply by varying the contact impact pressure. This is self-evident, and naturally it is necessary to change the contact time between the stem culm and the swinging rod and the contact angle of the swinging rod with respect to the stem culm.

Therefore, the purpose of the present invention is to provide a device for separating entangled stem culms that can widely adapt to crop conditions and untangle entangled stem culms. In addition to the center position variable function, in order to have the function of varying the contact length and contact angle between the swinging rod and the stem culm, the leading lower end of the swinging rod can be moved forward and backward in the longitudinal direction of the aircraft. A gripping member that is pivotally connected to the movement and tilt angle changing means and that is connected to the swinging rod drive mechanism holds the upper end of the trailing portion at a suitable position, so that the back and forth sliding movement and the tilting angle changing movement of the swinging rod are controlled. The device is characterized in that it is provided with a means for loosely gripping the swinging rod in a permissive state and for changing the swinging center position of the swinging rod in the left-right direction of the fuselage body.

Hereinafter, the details of the present invention will be explained based on the drawings.
The drawing shows an embodiment in which the present invention is applied to a rice grass cutter 1, and the rice grass cutter 1 drives left and right drive wheels 4 using a prime mover 3 mounted on its body 2. It is operated by being operated by a handle 5 extending facing forward, and a weeding rod 6 separates the grass from the uncut side, and a swinging rod 7 prevents the grass from becoming entangled with the uncut side. After the unraveled rush is raked up by a pair of left and right raking screw means 8, the root of the plant is cut by a cutting blade 9, and this cut rush is transferred to a vertically feeding clamping conveyor 10 (belt conveyor, etc.). The rotary body is then conveyed backward and upward, and during the conveyance, it comes into contact with guide rods 11, 11, and its posture is gradually changed to the lateral direction. 13, and the cut straw is sorted into long culms and short culms by a necessary cursing action.

In such a straw mower 1, a divider 14 is attached to the lower front of the machine body 2, projecting further forward than the raking screw means 8, through the machine body side frame 2a, and this divider 14 is connected to the inner shaft 15.
is a telescoping divider that moves forward and backward with respect to the fixed outer shaft 16 fitted therein, and as shown in FIG. 2, the inner shaft 1
The leading lower end of the swinging rod 7 is pivotally attached to the upper end of the swinging rod 5 via a universal joint 17a such as a ball joint. 18
is a drive mechanism for this swinging rod 7, which includes a disk 19 rotated by the rotational force of the prime mover 3, and a universal joint such as a ball joint at an eccentric position of the disk 19, as shown in FIGS. 1 and 4. It is fixed via 17b,
Therefore, a crank rod 20 for converting the rotational motion of the disk 19 into a substantially linear reciprocating motion, a bell crank 21 for converting the substantially linear reciprocating motion of the crank rod 20 into a rocking motion in the left-right direction of the aircraft body, and Frame 22 for support
The other end of the crank rod 20 is fixed to one end of the bell crank 21 via a universal joint 17c such as a ball joint, and a ring-shaped gripping member 23 is attached to the other end of the bell crank 21. The trailing upper end of the swinging rod 7 is inserted through the ring-shaped gripping member 23 as shown by the imaginary line in FIG. In this insertion portion, the ring-shaped gripping member 23 loosely grips the swinging rod 7, thereby allowing the swinging rod 7 to be slid back and forth and change its inclination angle, which will be described later. 24 is a fulcrum pin of the bell crank 21, and 25 is a locking bolt for locking the inner shaft 15 to the outer shaft 16 in the divider 14. In addition, in order to vary the swinging center position of the swinging rod 7 in the left-right direction of the aircraft, the support frame 22 is attached to the piston rod 26 of the fluid pressure cylinder 26 as shown in FIG.
a, and is configured to push and pull the support frame 22 and the bell crank 21 in the left-right direction of the fuselage as the cylinder 26 expands and contracts, and the lower end 22a at which the support frame 22 is pivotally connected to the divider outer shaft 16. (shown in Figure 2). The fluid pressure cylinder 26 may be another push/pull operation means.

In the swinging rod 7 configured in this manner, as the disk 19 is rotated during the grass cutting operation, the clod 20 performs a substantially linear reciprocating motion, and the bell crank 21 moves the machine body around the fulcrum pin 24. A swinging rod 7 whose upper end is held by a ring-shaped holding member 23 to perform reciprocating swinging movement in the left-right direction.
is similarly swung around the lower end which is pivotally connected to the inner shaft 15 of the divider 14, and as a result it collides with the entangled part of the rush, and the impact pressure of the contact loosens the entanglement. in this case,
Assuming that point P1 shown in FIG. 5 is the normal swinging center position of the swinging rod 7, and that the hatched range on both sides thereof is the swinging angle Q1, the fluid pressure cylinder 26
By contracting or expanding the support frame 22, the support frame 22 is pivoted around its lower end attachment part 22a, and the swing center position is moved to point P2 or point P3, and the center of rotation is moved to point P2 or point P3. If it is swung in the same manner as the above, the contact impact pressure against the rush can be varied accordingly. In addition, by loosening the locking bolt 25 to make the inner shaft 15 of the divider 14 protrude, and then tightening the locking bolt 25 to re-lock it to the state shown by the imaginary line in FIG. 2, the inclination angle α1 of the swinging rod 7, that is, the stem culm The angle of contact with the grass becomes shallower, and the contact length l1 with the rush becomes longer as the angle becomes shallower. Conversely, inner shaft 1
5 is moved back to the state indicated by the solid line in Figure 2, the inclination angle α2 of the swinging rod 7, that is, the angle of contact with the stem culm, becomes deeper, and the length of contact with the rush, l2, increases accordingly.
becomes short. Therefore, the contact impact pressure is varied according to the degree of entanglement, and the contact angle and contact length are adjusted to the length of the stem culm,
If it is varied according to the degree of lodging, etc., and furthermore, these are varied in combination, it is possible to use it optimally according to the crop situation.

Next, one such example will be explained. Of course, if the degree of entanglement is large, it is sufficient to increase the contact impact pressure, and the increase in the contact impact pressure can be achieved by moving the swinging center position of the swinging rod 7 toward the outside of the fuselage. . However, simply increasing the contact impact pressure will induce damage (cutting, etc.) to stem culms that are susceptible to impact, such as the above-mentioned rush. At this time,
If the swinging rod 7 is set in the imaginary line position shown in Fig. 2, the contact angle of the swinging rod 7 with the grass will be shallower, and the contact of the swinging rod 7 will be softer, and the length of contact with the grass will be reduced.
Since l1 is long, it is possible to loosen the tangles gradually and accurately over a relatively long period of time while keeping the contact soft and preventing damage to the grass. Furthermore, if the degree of entanglement is small, it is sufficient to reduce the contact impact pressure, which can be achieved by moving the center of swing of the swinging rod 7 toward the inside of the fuselage. It will be done. At this time, if the swinging rod 7 is set to the position shown by the solid line in FIG.
As the angle of contact with the grass becomes deeper, the contact of the swinging rod 7 becomes stronger, and the length of contact with the grass, l2, increases.
Since it is short, it is possible to untangle it in a short period of time with strong contact, and improve work efficiency. Moreover, even if the force of contact is strong, the contact time is short, so the grass will not be damaged.

The strength of the hit based on the change in the inclination angle of the swinging rod 7 described above will be understood from the following explanation. In other words, the second
In the figure, the swing stroke length in the left and right direction that the bell crank 21 applies to the swing rod 7 via the ring-shaped gripping member 23, which is the point of action on the swing rod 7, is because the swing angle Q1 is constant. There is no difference in the temporary loss line posture or the solid line posture. However, if the ground height of a certain part of the grass that the swinging rod 7 contacts is A, then the point A1 where the above part contacts the swinging rod 7 in the imaginary line posture is lower than the point A2 in the solid line posture. is also away from the point of action 23. Therefore, the amplitude at point A1 is naturally smaller than that at point A2, and therefore the contact pressure is softer.Furthermore, since the contact angle of the swinging rod 7 with the above-mentioned part is shallow in the imaginary line posture, it is even more The touch becomes softer.

In Figures 1 and 2, the swinging rod 7 is manufactured from a single long piece, but as shown in Figure 3, the inner rod 7a
It is also possible to make it a telescopic type with an outer rod 7b fitted over the outer rod 7b.

Furthermore, as shown in FIGS. 1 and 6, the above-mentioned weeding rod 6 is attached to the inner shaft 15 of the divider 14, and the swing rod 7 is attached to the inner shaft 15 of the divider 14.
If installed together with the structure, the weeding rod 6 can also be moved back and forth in accordance with the back and forth movement of the swinging rod 7.
There is an advantage that the weeding with the uncut side grass can always be carried out reliably near the lower end of the swinging rod 7. At this time, the sleeve 27 that grips the weeding rod 6 so as to be movable back and forth is connected to a fluid pressure cylinder 28, etc., to follow the movement of changing the center line of the swinging rod 7 shown in FIG. If the rod 6 is moved in and out in the lateral direction of the machine body, the weeding effect will be further increased. 29 is a bracket piece for fixing the tip of the weeding rod 6 to the inner shaft 15.

As described above, the present invention is equipped with a swinging rod in an inclined manner on the front part of the body of a stem culm reaper, and the rod is reciprocated in the left-right direction of the machine with its leading lower end as a swinging fulcrum. When using the contact impact pressure of the swinging rod to untangle the stem culm, not only the contact impact pressure but also the contact angle and contact length (contact time) with respect to the stem culm can be varied. from,
It has the advantage of adapting widely to crop conditions and disentangling the entanglements in a suitable manner.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a schematic explanatory diagram of a straw weed cutter to which the present invention is applied;
The figure is an enlarged view of the main part, Figure 3 is a modification of Figure 2, Figure 4 is an enlarged perspective view of the bell crank, and Figure 5 shows how to change the center line of swing of the rocking rod. FIG. 6 is a plan view showing a structure for sliding both the weeding rod and the swinging rod back and forth. 1... Stem culm reaper, 2... Body, 7... Swinging rod, 14... Swinging rod back and forth movement and inclination angle changing means (extendable divider), 18... Swinging rod drive mechanism,
23...Gripping member, 26...Swinging center position changing means (fluid pressure cylinder).

Claims (1)

[Scope of utility model registration request] A stem culm reaper is equipped with a swinging rod in an inclined manner on the front part of the body, and the rod is reciprocated in the left-right direction of the machine with its leading lower end as a swinging fulcrum,
The leading lower end of the swinging rod is pivotally connected to a swinging rod back and forth movement and inclination angle changing means that can move forward and backward in the longitudinal direction of the aircraft, and the trailing upper end is connected at an appropriate position to a swinging rod drive mechanism. The gripping member loosely grips the swinging rod in a state that allows the swinging rod to be slid back and forth and to change the tilt angle, and means for changing the center of swing of the swinging rod in the left-right direction of the aircraft body is provided. A device for separating entangled stems and culms in a stem and culm reaper, characterized by: