JP2008220243A - Reaping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reaping device which enables a speed for driving a reaping blade in a reciprocating manner along a receiving blade to be changed between strokes for driving the reaping blade in the reciprocating manner, and which enables the efficient reaping of a culm. <P>SOLUTION: This reaping device 4 is equipped with a cam mechanism 30 which comprises a rotatively-driven drive part 31, and a driven part 33 installed in the reaping blade 12 and following the drive part 31. The reaping blade 12 is driven in the reciprocating manner along the receiving blade 10 by the cam mechanism 30. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cutting device configured to reciprocate a cutting blade along a receiving blade.

  As a conventional technique, for example, as disclosed in Patent Document 1, a cutting blade (6 in FIG. 8 of Patent Document 1) disposed along a receiving blade (4 in FIG. 8 of Patent Document 1), A reaping device configured to be reciprocally driven by a driving mechanism (FIG. 7a of Patent Document 1), and a receiving blade (7 of FIG. 4 of Patent Document 2) as disclosed in Patent Document 2. 2. Description of the Related Art A cutting device configured to reciprocate a cutting blade (6 in FIG. 4 of Patent Document 1) arranged in a reciprocating manner by a crank arm (9 in FIG. 4 of Patent Document 2) is known.

Japanese Patent Laying-Open No. 2001-8519 (see FIGS. 1, 7, 8 and paragraph “0018”) Japanese Patent Laid-Open No. 2000-14222 (see FIGS. 2, 3 and 4)

  In the reaping device of Patent Document 1, a cutting blade head (12b of FIG. 7 of Patent Document 1) is operated by swinging the operation arm around a fulcrum (P of FIG. 7 of Patent Document 1). By operating 12) of FIG. 7 of Patent Document 1, the cutting blade connected to the cutting blade head is reciprocally driven at a constant speed. Further, in the cutting device of Patent Document 2, the knife head (10 of FIG. 4 of Patent Document 2) is operated by swinging the crank arm (9 of FIG. 4 of Patent Document 2). The connected cutting blades are configured to reciprocate at a constant speed.

  The cutting devices of Patent Document 1 and Patent Document 2 are configured to reciprocate the cutting blade at a constant speed by swinging the operation arm or the crank arm. Therefore, for example, by swinging the operation arm or crank arm of Patent Document 1 and Patent Document 2 at high speed or low speed, it is possible to uniformly change the speed of reciprocating the cutting blade to high speed or low speed. Though conceivable, the speed at which the cutting blade is driven to reciprocate along the receiving blade cannot be changed between the strokes at which the cutting blade is driven to reciprocate. Specifically, for example, the cutting blade is moved along the receiving blade such that the cutting blade is moved at a high speed at an intermediate position of the stroke for reciprocating driving, and the cutting blade is moved at a low speed at a position where the cutting blade and the receiving blade overlap. The reciprocating speed of the reciprocating drive cannot be changed between the strokes of reciprocating the cutting blade.

As a result, for example, when the type of reeds to be cut is different, the speed at which the cutting blade is driven to reciprocate along the receiving blades is optimized according to the type of reeds to be cut, and the reed is efficiently cut off. There was room for improvement in order to be able to.
An object of the present invention is to realize a reaping device that can change the speed at which the cutting blade is reciprocated along the receiving blade between strokes that reciprocate the cutting blade, and can efficiently shave the ridge. And

[I]
(Constitution)
The first feature of the present invention is that the reaping device is configured as follows.
While configuring a receiving blade by arranging a plurality of receiving blade bodies in parallel, configuring a cutting blade by arranging a plurality of cutting blade bodies in parallel,
A cam mechanism configured to include a drive unit that is rotationally driven and a non-drive unit that is provided on the cutting blade and follows the driving unit; and the cutting blade is moved along the receiving blade by the cam mechanism. To reciprocate.

(Function)
According to the first feature of the present invention, when the driving portion of the cam mechanism is rotationally driven, the non-driving portion of the cam mechanism moves following the shape of the driving portion of the cam mechanism and is provided in the non-driving portion of the cam mechanism. The cut blade is reciprocated along the receiving blade. As a result, the non-driving part can be moved at a speed set according to the shape of the driving part of the cam mechanism, and the speed at which the cutting blade is driven to reciprocate along the receiving blade by changing the shape of the driving part of the cam mechanism. Can be changed between strokes for reciprocating the cutting blade.

(The invention's effect)
According to the first feature of the present invention, by changing the shape of the drive portion of the cam mechanism in accordance with the type of scissors to be cut, the cutting blade is moved along the receiving blade according to the type of scissors to be cut. The speed of reciprocating drive can be optimized, and the cocoon can be efficiently reaped.

[Overall structure of the combine]
FIG. 1 shows a self-detaching combine equipped with a reaping device 4 according to the present invention. As shown in FIG. 1, at the front part of a traveling machine body 2 provided on the upper part of the crawler traveling device 1, a pulling device 3 that causes wrinkles from the surface and a mowing device 4 that cuts the wrinkles caused by the pulling devices 3 are provided. The self-removing combine is configured such that the reeds harvested by the reaping device 4 are transported to the rear part of the traveling machine body 2 by the transport device 5 and the feed chain 6, and threshing and sorting are performed in the threshing device 7.

[Overall configuration of reaping device]
In FIG.2 and FIG.3, the whole top view of the cutting device 4 and the vertical side view of the attaching part of the cutting device 4 are shown, respectively. In FIG. 2, a part of the upper portion of the cam mechanism 30 (such as the protective cover 50) is omitted. As shown in FIGS. 2 and 3, a support plate 16 is fixed to a support pipe 14 that extends rearward and downward from the cutting frame 15. A plurality of receiving blade bodies 11 constituting the receiving blade 10 are arranged on the right and left sides at equal intervals on the front upper surface side of the receiving blade fixing plate 17 and fixed with rivets.

  A knife bar 18 made of a strip-like plate material that is long on the left and right is disposed above the receiving blade fixing plate 17, and a plurality of cutting blade bodies 13 constituting the cutting blade 12 are left and right without any gaps on the lower surface side of the knife bar 18. They are arranged at equal intervals and fixed with rivets.

  A knife head 19 for linking to the cam mechanism 30 is rivet-fixed on the upper surface side of the knife bar 18, and the knife bar 18 interlocked and connected via the knife head 19 by rotating the cam mechanism 30 moves in the left-right direction. (See FIG. 4).

  The knife bar 18 to which the cutting blade body 13 is fixed is attached to the receiving blade fixing plate 17 from above by a plurality of cutting blade pressing plates 20 so as to be slidable in the left-right direction. The cutting blade pressing plate 20 to which the knife bar 18 is attached has a receiving blade with a slide plate 21, a liner 25, a spacer 22, and a shim 23 sandwiched between the receiving blade fixing plate 17 in a state where a spacer 24 is riveted to the front portion thereof. It is fixed to the rear part of the fixing plate 17.

  Thus, by covering the cutting blade body 13 constituting the cutting blade 12 from above with the spacers 22 and 24 fixed to the cutting blade holding plate 20, the cutting blade body 13 is moved in the vertical direction with respect to the receiving blade body 11. It is configured to slide in the left-right direction without difficulty while the movement is restricted, and the knife bar 18 to which the cutting blade body 13 is fixed is sandwiched from the front and rear by the spacers 22 and 24 fixed to the cutting blade presser plate 20. Thus, the cutting blade body 13 fixed to the lower surface side of the knife bar 18 is configured to slide to the left and right without difficulty while the movement in the front-rear direction is restricted with respect to the receiving blade body 11.

  The shape of the cutting part on both the left and right side surfaces of the receiving blade body 11 is formed into a shape curved outwardly in a plan view, and the cutting blade is obliquely formed on the lower surface side of the convexly curved portion. Has been processed. In addition, the shape of the cutting parts on both the left and right side surfaces of the cutting blade body 13 is formed in a concavely curved shape that enters the inner side in a plan view, and the cutting blade is slanted on the upper surface side of the concavely curved portion. Has been processed. In this way, by configuring the receiving blade body 11 and the cutting blade body 13, most of the ridges introduced into the reaping device 4 from the front can be guided rearward, and the receiving blade body 11 and the cutting blade body 13 It is possible to increase the number of cocoons cut at a position close to the root, and to efficiently shave the cocoons.

  With the configuration as described above, when the cam mechanism 30 linked to the knife head 19 is rotationally driven, the knife head 19 is reciprocated in the left-right direction. The knife bar 18 fixed to the knife head 19 is also reciprocated in the left-right direction, and the cutting blade body 13 fixed to the knife bar 18 is reciprocated in the left-right direction with respect to the receiving blade body 11 fixed to the receiving blade fixing plate 17. And it is comprised so that the cocoon introduced into the cutting device 4 from the front can be cut | disconnected.

  In addition, the cutting blade body 13 is left and right between strokes S between the blade receiving body 11 adjacent to the overlapping blade receiving body 11 from the state where it overlaps with the blade receiving body 11 shown in FIG. It is configured to reciprocate.

[Detailed structure of cam mechanism]
The detailed structure of the cam mechanism 30 will be described with reference to FIGS. 4 and 5 show a longitudinal side view and a plan view of the cam mechanism 30, respectively. FIG. 6 shows a schematic plan view for explaining the shape of the cam 31 of the cam mechanism 30, and FIG. 4 is a longitudinal rear view of the spring mechanism 40 on the left side of FIG. In FIG. 5, a part of the upper part of the cam mechanism 30 (protective cover 50 and the like) is omitted.

  As shown in FIGS. 4 and 5, the cam mechanism 30 includes a cam 31 (corresponding to a drive unit), a pin 32, a contact member 33 (corresponding to a non-drive unit), a drive shaft 36, and a pulley 38. The spring mechanism 40 is provided so that the contact member 33 is brought into contact with the cam surface 31A on the outer peripheral surface of the cam 31, and the contact member 33 is caused to follow the cam 31.

  A pin 32 is fixed to a knife head 19 that is riveted to the knife bar 18, and an abutting member 33 that abuts the cam 31 is supported at the tip of the pin 32 so as to be rotatable about a vertical axis P1. Has been.

  A U-shaped bracket 34 having a forward cross-sectional shape is extended upward from the lower surface side of the rear end portion of the receiving blade fixing plate 17 for fixing the receiving blade 10, and a drive shaft is connected to the bracket 34 via a bearing member 35. 36 is rotatably supported around the vertical axis P2. A disk-like flange portion 36a is formed at the lower end portion of the drive shaft 36, and a plurality of bolts 37 are fastened and fixed by bringing the upper surface side of the cam 31 into contact with the flange portion 36a from below. Thus, the cam 31 can be fixed to the drive shaft 36.

  A pulley 38 is coupled to the upper end portion of the drive shaft 36 so as to be integrally rotatable. A drive pulley (not shown) to which power from the pulley 38 and a combine engine (not shown) is transmitted in a branched manner. Are coupled to each other via a transmission belt 39 so that the drive shaft 36 can be rotationally driven. Since the pulley 38 is detachably attached to the drive shaft 36, the reciprocating speed of the cutting blade 12 relative to the receiving blade 10 can be easily changed by replacing the pulley 38 with a different pitch circle diameter. .

  The pulley 38 and the transmission belt 39 are covered with a protective cover 50 and the outer periphery of the pulley 38 and the transmission belt 39 are covered with the cutting device 4 to prevent the hail and the like from being wound around the pulley 38 and the transmission belt 39 to prevent malfunction. It is comprised so that failure of the apparatus 4 can be prevented.

  As shown in FIG. 6, the shape of the cam 31 in a plan view is the stroke S (the stroke of the cutting blade 12 with respect to the receiving blade 10 (the stroke of the cutting blade 12 with respect to the receiving blade 10)). The shape of the cam surface 31A is set so that the cutting blade 12 is moved at low speed at both the left and right ends of the cutting blade 12) and the cutting blade 12 is moved at high speed in the vicinity of the left and right intermediate position S1 of the stroke S. Thus, it is shaped into a smoothly curved shape so that the reciprocating speed (moving speed of the cutting blade 12 relative to the receiving blade 10) changes smoothly. Note that the curve indicated by the two-dot chain line in FIG. 7 shows the outer shape of the cam 31 when the shape of the cam 31 in plan view is set so that the cutting blade 12 moves at a substantially constant speed during the stroke S. Show.

  In this way, by setting the shape of the cam surface 31A of the cam 31, a left and right intermediate position S1 of the stroke S that requires a relatively large cutting force for cutting the barb supplied between the receiving blade 10 and the cutting blade 12. In the vicinity, the cutting blade 12 can be moved with respect to the receiving blade 10 at a high speed, and the cocoon can be cut off without applying an excessive force to the blade portion of the receiving blade 10 and the blade portion of the cutting blade 12. In addition, by moving the cutting blade 12 at low speeds at both the left and right ends of the stroke S, a large amount of reeds supplied to the cutting device 4 can be guided to positions close to the roots of the receiving blade 10 and the cutting blade 12. In addition, it is possible to reap the cocoon without difficulty at a position close to the root of the cutting blade 12. As a result, the cutting marks of the cocoon are likely to be uniform, the subsequent tilling work is easy to perform, and the load for cutting the cocoon on the tips of the blade portions of the receiving blade 10 and the cutting blade 12 is less likely to act, The lifetimes of the receiving blade 10 and the cutting blade 12 can be extended.

  In addition, a plurality of cams 31 in which the shape of the cam surface 31A is formed in a shape corresponding to the type of scissors to be cut and the shapes of the receiving blade 10 and the cutting blade 12 are set, and the bolts 38 are removed to remove the plurality of cams. By configuring 31 so as to be replaceable, a suitable reaping device 4 according to the type of cocoon or the like can be realized by simply replacing the cam 31 even when the type of cocoon or the like is different.

  When the drive shaft 36 is driven to rotate at a constant speed and the cam 31 fixed to the drive shaft 36 rotates at a constant speed, the contact member 33 that contacts the cam surface 31A of the cam 31 rotates about the axis P1. Meanwhile, the knife bar 18 and the knife bar 18 connected to the knife head 19 are reciprocated in the left-right direction at a speed set by the shape of the cam surface 31A, and the knife head 19 is reciprocated in the left-right direction via the pin 32. The cutting blade 12 fixed to can be driven to reciprocate in the left-right direction.

  As shown in FIG. 7, a spring mechanism 40 including a plate 41, a bracket 42, and an elastic spring 43 is attached to the left side portion of the reaping device 4. A plate 41 is fixed to the left end portion of the knife bar 18, and a spring mounting portion 41 a for attaching an elastic spring 43 is formed on the plate 41. A bracket 42 having an L-shaped longitudinal section extends from the lower surface side of the receiving blade fixing plate 17 to which the receiving blade 10 is fixed to the left side, and a spring mounting portion 42a is formed on the bracket 42.

  An elastic spring 43 is externally fitted to the spring mounting portion 41 a of the plate 41 and the spring mounting portion 42 a of the bracket 42, and the bracket 42 is fastened and fixed to the receiving blade fixing plate 17 with bolts 44 with the elastic spring 43 assembled. Thus, the elastic spring 43 and the bracket 42 are configured to be fixed to the side end portion of the reaping device 4.

  In a state where the elastic spring 43 and the bracket 42 are fixed to the reaping device 4, the free length and the wire diameter of the elastic spring 43 are set so that the spring reaction force of the elastic spring 43 acts in the direction of pushing the knife bar 18 to the right side. 5 is configured so that the contact member 33 can be pressed against the cam surface 31A of the cam 31 with a constant force in a state where the contact member 33 and the knife bar 18 shown in FIG. Yes.

  When the cam 31 rotates and the knife bar 18 moves to the left side from the state where the contact member 33 and the knife bar 18 shown in FIG. 5 move to the rightmost side, the plate 41 fixed to the left side of the knife bar 18 moves to the left side. The elastic spring 43 is compressed by being pressed by the plate 41. When the cam 31 further rotates from the state in which the elastic spring 43 is compressed most and the abutment member 33 and the knife bar 18 move to the right side, the knife bar 18 moves to the right side by the spring reaction force of the elastic spring 43, and the cam of the cam 31 The contact member 33 can be smoothly reciprocated in the left-right direction along the cam surface 31A of the cam 31 while applying a spring reaction force in a direction in which the contact member 33 is pressed against the surface 31A.

[First Alternative Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], the contact member 33 supported so as to be rotatable about the vertical axis P1 is supported so as to be rotatable about the vertical axis P2. Although an example in which the cam mechanism 30 is configured to reciprocate the cutting blade 12 in the left-right direction by the cam 31 is shown, a different structure may be adopted as a structure for reciprocating the cutting blade 12 in the left-right direction. A cam mechanism 30 as shown in FIG. 8 may be employed. Other configurations other than those described later are the same as those described in [Best Mode for Carrying Out the Invention].

  As shown in FIG. 8, a plate 45 is fixed to the knife bar 18, and a contact member 33 having a rotatable spherical roller attached to the tip is attached to the plate 45. A bracket 34 having an L-shaped cross section extends upward from the lower surface side of the right end portion of the receiving blade fixing plate 17, and a drive shaft 36 is axially centered in the left-right direction via a bearing member 35 on the bracket 34. It is rotatably supported around P3.

  A cylindrical cam 31 is externally fitted to the drive shaft 36 so as to be slidable in the direction of the axis P3 and integrally rotatable with a buffer spring 46 interposed between the bracket 34 and the buffer spring 46. The spring reaction force is slightly applied to the drive shaft 36 from the left side by a stopper 47.

  The cam 31 is formed in a shape in which the cam surface 31A on the left side is inclined obliquely, and the cam 31 and the like are arranged so that the tip roller of the abutting member 33 contacts the obliquely inclined cam surface 31A. It is installed.

  By configuring the cam mechanism 30 as described above, when the drive shaft 36 is rotationally driven at a constant speed and the cam 31 fixed to the drive shaft 36 rotates at a constant speed around the axis P3, the cam surface of the cam 31 The abutting member 33 abutted on 31A is guided by the cam surface 31A of the cam 31 inclined obliquely, and is reciprocated in the left-right direction at a speed set by the shape of the cam surface 31A. The fixed cutting blade 12 can be reciprocated in the left-right direction.

  When an excessive external force acts on the cutting blade 12 and the knife bar 18 tries to move against the reciprocating drive by the cam mechanism 30, the buffer spring 46 is compressed and the cam 31 moves to the right following the movement of the knife bar 18. The excessive external force acting on the cutting blade 12 can be absorbed by the buffer spring 46 interposed between the bracket 34 and the cam 31. As a result, it is difficult for an excessive external force to act on the reaping device 4 and the cam mechanism 30, and the reaping device 4 and the cam mechanism 30 can be prevented from being damaged. realizable. Instead of the buffer spring 46, another elastic member (not shown) may be employed.

[Second Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention] and [First Different Embodiment of the Invention], the cam member 31 is brought into contact with the cam surface 31A on the outer surface side of the cam 31, and the cam 31 is brought into contact with the cam 31. Although an example in which the cam mechanism 30 is configured to follow the contact member 33 has been shown, a cam mechanism 30 having a different structure as shown in FIG. 9 may be employed.

  As shown in FIG. 9 (a), the cam 31 is formed in a shape that opens downward, a cam surface 31A is provided on the inner peripheral surface of the cam 31, and a contact member is provided on the cam surface 31A formed on the inner peripheral surface. The cam mechanism 30 may be configured such that the contact member 33 is brought into contact with and the contact member 33 is driven to reciprocate in the left-right direction. With this configuration, the abutting member 33 can be accommodated in the cam 31, and the cam mechanism 30 that is compact and hardly damaged can be realized.

  As shown in FIG. 9B, a guide groove 31B opened downward is formed in the cam 31, and the contact member 33 is brought into contact with the cam surfaces 31A on both side surfaces of the guide groove 31B. The cam mechanism 30 may be configured to reciprocate in the left-right direction. With this configuration, the cam mechanism 30 can be used to move the knife bar 18 without using a mechanism for moving the knife bar 18 to the right, such as the spring mechanism 40 of the above-mentioned [Best Mode for Carrying Out the Invention]. It can be reciprocated right and left. As a result, the structure of the cam mechanism 30 can be simplified and the manufacturing cost can be reduced.

[Third Another Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], [First Alternative Embodiment of the Invention] and [Second Alternative Embodiment of the Invention], the cutting blade 12 is moved at low speed at both the left and right ends of the stroke S. The example in which the shape of the cam surface 31A is set so as to move and move the cutting blade 12 at high speed at the left and right intermediate position S1 of the stroke S has been shown. The speed at which the blade 12 is moved) may be set to a different shape, and the rate of change of the speed at which the cutting blade 12 moves between the strokes S may be set to a different rate of change. Moreover, you may employ | adopt not only the curved shape but the bent shape.

  In the above-mentioned [Best Mode for Carrying Out the Invention], [First Another Mode of Carrying Out the Invention] and [Second Another Mode of Carrying Out the Invention], the cam mechanism 30 is attached to the reaping device 4 mounted on the combine. Although shown in the adopted example, the present invention is not limited to the reaping device 3 equipped in the combine, and can be applied to, for example, a binder (not shown) that does not include the threshing device 7 or the like.

Combine left side view Overall plan view of reaping device Longitudinal side view of the attachment part of the reaping device Longitudinal side view near the cam mechanism Plan view near the cam mechanism Schematic plan view explaining the shape of the cam of the cam mechanism Longitudinal side view near the spring mechanism Longitudinal side view of the vicinity of the cam mechanism in the first alternative embodiment of the invention Schematic of the cam mechanism in the second alternative embodiment of the invention

Explanation of symbols

4 Cutting device 10 Receiving blade 11 Receiving blade body 12 Cutting blade 13 Cutting blade body 30 Cam mechanism 31 Cam (drive unit)
33 Contact member (non-drive part)

Claims (1)

While configuring a receiving blade by arranging a plurality of receiving blade bodies in parallel, configuring a cutting blade by arranging a plurality of cutting blade bodies in parallel,
A cam mechanism configured to include a drive unit that is rotationally driven and a non-drive unit that is provided on the cutting blade and follows the driving unit; and the cutting blade is moved along the receiving blade by the cam mechanism. And a reapturing device configured to reciprocate.

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