JP2905073B2 - Stem tying unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stem-and-stem bundling apparatus for activating a one-turn clutch when a focusing pressure applied to a door from a stem and a stem reaches a set value, and bundling the stem and stem applied to the door.

[0002]

2. Description of the Related Art An example of the stem-and-culm binding apparatus as described above is disclosed in Japanese Patent Application Laid-Open No. 63-39514. In this stem-and-culm binding device, a driving rotary member that is always rotated and driven by a one-rotation clutch, a wedge-shaped driving convex portion (10 in FIG. 1 of the aforementioned publication) fixed to the driving rotary member, and the same as the driving rotary member. A driven rotation member (14 in FIG. 1 of the above-mentioned publication) of a one-rotation clutch is provided in parallel with the core. The driven rotating member is provided with a clutch arm (11, 11a in FIG. 1 of the above publication) so as to swing freely, and a roller at one end of the clutch arm (see the tip of 11 in FIG. 1 of the above publication) is provided. A spring (1 in FIG. 1 of the above publication) for urging the clutch arm so as to enter the movement locus of the driving projection.
2) is provided.

In the state shown in FIG. 1 of the above publication, the first operating member (19, 13 in FIG. 1 of the above publication) is in contact with the other end of the clutch arm (11a in FIG. 1 of the above publication). In this case, the driven rotary member is stopped at a predetermined stop position,
The clutch arm is moved by the first operating member to the first
The roller of the clutch arm is displaced from the movement locus of the driving convex portion by the swing operation in the clockwise direction in the drawing (corresponding to the cutting position). In this state, when the focusing pressure applied from the stem to the door (8 in FIG. 1 of the above-mentioned publication) reaches a set value, as shown in FIG. 23) in the drawing, the first operating member is operated to be released from the clutch arm, and the biasing force of the spring causes the clutch arm to swing counterclockwise in FIG. Into the movement locus of the convex portion (corresponding to the entry position). This allows
The driving projection of the driving rotary member comes into contact with the roller of the clutch arm, and the driven rotary member is rotated one turn together with the driving rotary member to perform one binding.

[0004]

In the above-described structure, the driving rotary member and the driving projection are constantly rotating, and when the focusing pressure applied from the stem to the door reaches the set value, the clutch arm is actuated by the urging force of the spring. Of the driving protrusion enters the movement locus of the driving projection. Thus, when the roller of the clutch arm enters the movement locus of the driving protrusion, it is completely unknown where the driving protrusion is located in the movement locus. In this case, there is a limit to the speed at which the roller of the clutch arm enters the movement locus of the driving projection by the spring. For example, when the roller of the clutch arm enters the movement locus of the driving projection, the driving projection If the part is sufficiently far from the roller of the clutch arm in the movement locus, the roller of the clutch arm sufficiently enters the movement locus of the drive protrusion, and then the drive protrusion contacts the roller of the clutch arm. It will be in a contact state,
The driven rotary member is rotated by the drive rotary member one rotation to perform the binding.

[0005] On the other hand, for example, when the roller of the clutch arm enters the movement locus of the driving projection, if the driving projection reaches the immediate vicinity of the roller of the clutch arm, the roller of the clutch arm will not move. In a state where a part of the wedge-shaped driving protrusion is slightly in the movement locus of the driving protrusion, the leading end of the wedge-shaped driving protrusion comes into contact with a part of the roller of the clutch arm. Therefore, in such a state, the driving convex portion does not sufficiently contact the roller of the clutch arm and slips off the roller, so that the driving rotary member makes another rotation without binding. During this time, the stem is being fed into the door, so if the drive rotating member makes another rotation, the drive protrusion contacts the roller of the clutch arm and the unit is bound, The stalks of the culm become very large. An object of the present invention is to prevent a state in which binding is not performed unless the drive rotating member rotates again by the position of the drive convex portion of the drive rotating member in the stem-and-culm binding device as described above. .

[0006]

The feature of the present invention resides in the following configuration of the stem-and-culm binding apparatus as described above. In other words, the driving rotary member that is constantly rotated in the one-rotation clutch for the binding operation, the driving protrusion fixed to the driving rotary member, and the one-rotation clutch that is coaxially arranged with the driving rotary member. A driven rotating member, one end of which enters the movement trajectory of the driving projection and comes into contact with the driving projection; A clutch arm having a balance-shaped clutch arm swingable about an axis parallel to the rotation axis of the member on the driven rotation member, and a spring for urging the clutch arm to swing toward the entry position; Swinging the clutch arm to the off position by contacting the other end of the
The first operating member stops the driven rotary member at a predetermined stop position by contacting the other end of the clutch arm, and the urging force of the spring for setting the focusing pressure as the focusing pressure applied from the stem to the door increases. A second operating member for operating the first operating member away from the other end of the clutch arm by displacing the first operating member from the other end of the clutch arm. A contact surface along the radial direction of the drive rotating member,
The driving rotary member includes a relief surface along the circumferential direction, and a corner formed by the contact surface and the relief surface, and the first operation member is operated to be separated from the other end of the clutch arm by the second operation member. When the clutch arm swings to the engagement position side by the biasing force of the spring, the corner of the driving protrusion and the corner of one end of the clutch arm contact, or the contact surface of the driving protrusion and the clutch arm The driven rotating member is configured to make one rotation together with the driving rotating member by contact with the contact surface at one end.

[0007]

According to the structure of the present invention, for example, as shown in FIG. 1, while the stalk culm being collected is received by the door during the convergence, the driving rotary member 7 is constantly rotating. The first operating member 13 abuts on the other end 10 e of the clutch arm 10 of the driven rotating member 9, and the clutch arm 1
0 swings counterclockwise in FIG. 1, and the one end 10 a of the clutch arm 10 is out of the movement locus of the driving convex portion 7 a of the driving rotating member 7 (corresponding to a cutting position). As a result, the driving rotary member 7 idles clockwise in FIG. 1 and the driven rotary member 9 stops at a predetermined stop position as shown in FIG. Then, as the amount of stem culm received by the door increases and the focusing pressure applied to the door from the stem culm increases, the second operating member 16 moves the first operating member 13 from the other end 10 e of the clutch arm 10. The operation is performed by separating the paper downward in FIG. As a result, the clutch arm 10 swings clockwise in FIG. 1 by the urging force of the spring 11, and one end 10a of the clutch arm 10 attempts to enter the movement locus of the driving projection 7a.

As described above, one end 1 of the clutch arm 10
When the driving protrusion 7a is located at a position sufficiently separated from the one end 10a of the clutch arm 10 in the movement locus when the driving protrusion 7a enters the movement locus of the driving protrusion 7a (for example, one end of the clutch arm 10). There is a little time until the driving projection 7a reaches the one end 10a of the clutch arm 10 or a position on the opposite side of the clutch arm 10 by 180 °, or a position past the position of the one end 10a of the clutch arm 10.
Therefore, in such a case, the one end 10a of the clutch arm 10 sufficiently enters into the movement locus of the driving projection 7a by the action of the spring 11, and then the driving projection 7a reaches the one end 10a of the clutch arm 10. Therefore, for example, as shown in FIG. 2, the contact surface 7b of the driving projection 7a contacts the contact surface 10b of the one end 10a of the clutch arm 10, and the driven rotation member 9 is moved together with the drive rotation member 7. Is rotated once to perform binding.

Conversely, as described above, the clutch arm 1
When the one end 10a of the clutch arm 10 enters the movement locus of the driving projection 7a, the driving projection 7a
When the drive protrusion 7a reaches the vicinity of 0a, there is almost no time until the drive projection 7a reaches the one end 10a of the clutch arm 10. Therefore, in such a case, when the one end 10a of the clutch arm 10 slightly enters the movement locus of the driving projection 7a by the action of the spring 11, the driving projection 7a immediately reaches the one end 10a of the clutch arm 10. However, even in such a case, as shown by a dashed line arrow in FIG.
Abuts on a corner 10d of one end 10a of the
And the driven rotation member 9 is rotated once.
One bundling is performed in the same manner as described above.

[0010]

As described above, by forming the contact surface and the corner on each of the driving convex portion of the driving rotary member and one end of the clutch arm of the driven rotary member, the position of the driving convex portion can be determined. However, when the clutch arm swings toward the entry position, the driving projection is securely contacted at one end of the clutch arm without slipping through, so that binding is performed. As a result, the driving projection does not come into contact with the clutch arm and slips through without being bound, so that the driving rotation member is rotated once more and the binding is performed without generating a large bundle. As a result, a tied bundle having a constant size can be always obtained, and the tying performance of the stem-and-stem tying device can be improved.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 3 show the vicinity of a single-rotation clutch of a stem-and-stem bundling device provided in a combine or a binder, etc., and a transmission shaft 1 to which power is transmitted, a packer shaft 3 for constantly driving a packer 2, and a needle. A needle shaft 5 for driving the motor 4 is disposed. A transmission gear 6 is fixed to the packer shaft 3, and a drive gear 7 (corresponding to a drive rotating member) is fitted around the needle shaft 5 by a needle bearing so as to be relatively rotatable, and the transmission gear 6 and the drive gear 7 are engaged. The power of the transmission shaft 1 is transmitted to the transmission gear 6, the packer shaft 3, and the drive gear 7 via the transmission chain 8.

A clutch cam 9 (corresponding to a driven rotary member) is fixed to the needle shaft 5, and an axis P1 of the clutch cam 9 is fixed.
A clutch arm 10 is swingably supported around (corresponding to an axis parallel to the rotation axis (needle axis 5) of the clutch cam 9) and biases the clutch arm 10 clockwise in FIG. Spring 11 is attached. As shown in FIG. 3, one end 10a of the clutch arm 10 protrudes toward the drive gear 7, and as shown in FIG. 1, the one end 10a of the clutch arm 10 comes into contact with a contact surface 10b (shaft center) along the radial direction of the drive gear 7. A corner formed by an arc surface centering on P1), a relief surface 10c along the circumferential direction of the drive gear 7 (an arc surface centering on the needle shaft 5), and the contact surface 10b and the relief surface 10c. 10d.

On the other hand, as shown in FIGS. 1 and 3,
The driving gear 7 is integrally formed with a driving projection 7a. A contact surface 7b slightly inclined along the radial direction of the drive gear 7 on the drive convex portion 7a, a relief surface 7c along the circumferential direction of the drive gear 7 (an arc-shaped surface around the needle shaft 5), And a corner 7d formed by the contact surface 7b and the relief surface 7c.

A triangular spring receiving member 1 is mounted on the packer shaft 3.
The first operating member 1 is fitted around the axis P2 of the spring receiving member
3 is swingably supported, and a spring 14 for setting a focusing pressure is provided between the spring receiving member 12 and the first operating member 13. A roller 12 a of the spring receiving member 12 is provided on the outer periphery of the clutch cam 9. In contact.

A door 15 for receiving the bundle of stems and stems
The second operating member 16 is fixed to the door shaft 15a having
The pin 16 a of the second operation member 16 is inserted into the long hole 13 a of the first operation member 13. A brake arm 17 for preventing reverse rotation of the clutch cam 9 is swingably supported around the axis P3.
Are urged toward the side of engagement with the clutch cam 9.

The state shown in FIG. 1 and FIG. 3 is a state in which the stalks to be collected are received by the door 15 during the convergence. In this case, while the packer shaft 3 and the drive gear 7 are constantly driven to rotate, the locking portion 13b of the first operating member 13 contacts the other end 10e of the clutch arm 10, and the clutch arm 10 Swing counterclockwise on page 1
One end 10a of the clutch arm 10 is disengaged from the movement locus of the driving projection 7a of the driving gear 7 toward the needle shaft 5 (corresponding to a cutting position), and the driving gear 7 idles clockwise in FIG. The clutch cam 9 and the needle shaft 5 are moved by the contact of the engaging portion 13b of the first operating member 13 with the other end 10e of the clutch arm 10 and the engagement of the brake arm 17 with the clutch cam 9. 1 (corresponding to a predetermined stop position).

As the amount of stem culm received by the door 15 increases and the focusing pressure applied to the door 15 from the stem culm increases, the door 15 retreats, and the door shaft 15a and the second operating member 16 move as shown in FIG. Of the spring 14
While compressing the operation, the locking portion 13b of the first operation member 13 is separated from the other end 10e of the clutch arm 10 and operated. Then, when the focusing pressure of the stem and stem applied to the door 15 reaches the set value, the locking portion 13b of the first operating member 13 as shown in FIG.
Is completely disengaged from the other end 10e of the clutch arm 10 downward in the drawing, and the biasing force of the spring 11 causes the clutch arm 10 to
, The one end 10a of the clutch arm 10 tries to enter the movement locus of the driving projection 7a (corresponding to the entry position).

As described above, one end 1 of the clutch arm 10
When 0a enters the movement locus of the drive projection 7a of the drive gear 7, if the drive projection 7a is located sufficiently away from the one end 10a of the clutch arm 10 in the movement locus (for example, the clutch A position 180 ° opposite to one end 10a of the arm 10 or one end 1 of the clutch arm 10
0a) and the drive projection 7a reaches one end 10a of the clutch arm 10 for a short time.

Therefore, in such a case, the one end 10a of the clutch arm 10 is moved by the action of the spring 11 to the driving projection 7a.
Of the driving protrusion 7a
1 reaches one end 10a of the clutch arm 10,
The contact surface 7b of the driving projection 7a shown in FIG.
0 on one end 10a of the drive gear 7
, The clutch cam 9 and the needle shaft 5 are rotated once. As a result, a knotter building (not shown) linked to the needle 4 and the needle shaft 5 is operated, and a single binding is performed.

Conversely, the clutch arm 1
When the one end 10a of the clutch arm 10 enters the movement locus of the driving projection 7a, the driving projection 7a
When the drive protrusion 7a reaches the vicinity of 0a, there is almost no time until the drive projection 7a reaches the one end 10a of the clutch arm 10. Therefore, in such a case, when the one end 10a of the clutch arm 10 slightly enters the movement locus of the driving projection 7a by the action of the spring 11, the driving projection 7a immediately reaches the one end 10a of the clutch arm 10. However, even in such a case, as indicated by a dashed line arrow in FIG.
The corner 7d of the driving projection 7a comes into contact with the corner 10d of the one end 10a of the clutch arm 10, and the clutch cam 9 and the needle shaft 5 are rotated once together with the driving gear 7, as described above. One unity is performed.

When the binding is performed as described above, the roller 12a of the spring receiving member 12 enters the large notch portion of the clutch cam 9, and the door 15 can be largely retracted (the first operating member 13). 1 swings largely in the clockwise direction in FIG. 1, and the second operating member 16 swings largely in the counterclockwise direction in FIG. 1). Is done.

When the binding is performed once as described above, the projection 9a of the clutch cam 9 comes into contact with the arm 13c of the first operating member 13, and the first operating member 13 in the position shown in FIG. Is forcibly operated in the counterclockwise direction on the paper surface, and the locking portion 13b of the first operating member 13 contacts the other end 10e of the clutch arm 10 as shown in FIG. As a result, the clutch arm 10 swings counterclockwise in FIG. 1 so that one end 10a of the clutch arm 10 is displaced from the movement locus of the driving projection 7a of the driving gear 7 toward the needle shaft 5, and the brake arm 17 is engaged with the clutch cam 9, and the clutch cam 9 and the needle shaft 5 stop at the position shown in FIG. 1 (corresponding to a predetermined stop position).

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a vicinity of a one-rotation clutch, showing a state in which stems and culms in which one end of a clutch arm deviates from a movement locus of a driving projection are being focused.

FIG. 2 is a rotation showing a state in which a stem and a stem to be bundled reach a set amount, one end of a clutch arm enters a movement locus of a driving protrusion, and the driving protrusion contacts one end of the clutch arm. Longitudinal side view near the clutch

FIG. 3 is a cross-sectional plan view near a one-rotation clutch, showing a state in which stems and culms in which one end of a clutch arm deviates from a movement locus of a driving projection are being focused.

[Explanation of symbols]

 Reference Signs List 7 driving rotating member 7a driving convex portion 7b contact surface of driving convex portion 7c relief surface of driving convex portion 7d corner portion of driving convex portion 9 driven rotating member 10 clutch arm 10a one end of clutch arm 10b one end of clutch arm 10c Relief surface at one end of the clutch arm 10d Corner of one end of the clutch arm 10e The other end of the clutch arm 11, 14 Spring 13 First operating member 15 Door 16 Second operating member P1

Claims (1)

(57) [Claims] 1. A driving rotary member (7) which is constantly driven to rotate in a one-turn clutch for binding operation, a driving projection (7a) fixed to the driving rotary member (7), and the driving rotation. A driven rotary member (9) of a one-rotation clutch coaxially arranged with the member (7), and one end (10a) enters into the movement trajectory of the driving projection (7a) and The rotation position of the driven rotating member (9) is parallel to the entry position where the driven rotation member (9) comes into contact with the projection (7a) and the cutting position where the one end (10a) comes out of the movement locus of the driving projection (7a). The driven rotating member (9) is provided with a balance-shaped clutch arm (10) that can swing around a central axis (P1), and biases the clutch arm (10) to swing toward the entry position. A spring (11), the other end (10) of the clutch arm (10); ) In pivoted to a position off the clutch arm (10) by Setto, and by Setto to the other end (10e) of said clutch arm (10), the driven rotary member (9)
Operating member (13) for stopping the lens at a predetermined stop position, and displacing against the urging force of the spring (14) for setting the focusing pressure with an increase in the focusing pressure applied to the door (15) from the stem. A second operating member (16) for operating the first operating member (13) away from the other end (10e) of the clutch arm (10), and a driving projection of the drive rotating member (7). A contact surface (7b) along the radial direction of the drive rotating member (7) on each of the contact side portion of the portion (7a) and the contact side portion of one end (10a) of the clutch arm (10). , (10b)
Relief surfaces (7c) and (10c) along the circumferential direction of the driving rotary member (7), and the contact surfaces (7b) and (10).
b) and corners (7d) and (10d) formed by the relief surfaces (7c) and (10c), and the first operating member (13) is formed by the second operating member (16).
Is operated to separate from the other end (10e) of the clutch arm (10), and the clutch arm (10) swings toward the on position by the urging force of the spring (11). ) Corner (7d) and clutch arm (1
0) at one end (10a) with a corner (10d), or at the contact surface (7b) of the driving projection (7a) with one end (10a) of the clutch arm (10). )
And the driven rotating member (9) is rotated once by the contact with the driven rotating member (7).