JP7239405B2 - Pre-harvest treatment equipment for corn harvester - Google Patents

Description

The present invention relates to a pre-harvest treatment device for a corn harvester.

Conventionally, as a pre-harvest treatment device for a corn harvester, for example, a pre-harvest treatment device for a corn harvester described in Patent Document 1 is known. In the pre-harvest processing device ("harvesting section [12]" in the document) of the corn harvester described in Patent Document 1, left and right locking conveying devices (in the document "Endless transport chain [16]"), which is provided below the locked transport device and pulls down from both the left and right sides the planted stem culm introduced into the transport path between the left and right locked transport devices. left and right harvesting rolls (“harvesting roll [15]” in the literature) for separating the corn tufts from the planting stem culms, and left and right harvesting rolls provided above the locking conveying device and covering the locking conveying device from above. and a left and right divider (in the literature, "divider [14] ”) and are provided.

JP 2018-68146 A

In the pre-harvest treatment device for the corn harvester disclosed in Patent Document 1, since the front portion of the locking and conveying device is covered from above by the divider, maintenance of the locking and conveying device cannot be easily performed.

In view of the above situation, there is a demand for a pre-harvest treatment device for a corn harvester that allows easy maintenance of the locking and conveying device.

The present invention is characterized by left and right locking and conveying devices for locking and conveying corn tufts rearward,
The planting stem culm provided below the locking and conveying device and introduced into the conveying path between the left and right locking and conveying devices is pulled down from both the left and right sides, whereby the planting stalk culm is removed from the Left and right harvesting rolls for separating the corn tufts, a drawing auger provided behind the locking and conveying device for transversely conveying the corn tufts, and a drawing auger provided above the locking and conveying device, left and right cover members covering the locking and conveying device from above; a left and right divider to be introduced into the body, wherein the divider is configured to be changeable between a use posture positioned in front of the cover member and a retracted posture positioned above the cover member, and the cover member is , the position can be changed between a closed position in which the locking and conveying device is covered from above and an open position in which the locking and conveying device is opened upward. It is capable of swinging about a first swing axis extending along the same axis to change the posture between the use posture and the storage posture, and the front and rear directions are reversed between the use posture and the storage posture. The posture of the cover member is changed, and the cover member swings around a second swing axis extending in the left-right direction with the rear portion of the cover member serving as a fulcrum, thereby changing the posture between the closed posture and the opened posture. When the cover member is changed to the open posture while the divider is in the retracted posture and is in contact with the upper surface of the cover member , the front end portion of the divider becomes the scraping auger in a side view. There is duplication.

According to this characteristic configuration, the front portion of the locked carrier device is opened by changing the posture of the divider from the use posture to the retracted posture. This makes it easier to reach the front portion of the locked carrier device when performing maintenance on the locked carrier device. That is, it is possible to realize a pre-harvest processing device for a corn harvester that allows easy maintenance of the locking conveying device.

In addition, a simple configuration in which the divider is vertically swung at the rear fulcrum makes it possible to easily configure a configuration in which the divider can be changed between the use posture and the retracted posture. Further, when the front end of the divider touches the field during harvesting, the divider swings upward at the rear fulcrum. As a result, it is possible to prevent the divider from thrusting into the field during harvesting.

By changing the posture of the cover member from the closed posture to the open posture, the locking conveying device is opened upward. As a result, maintenance of the locked conveying device can be performed more easily.

With a simple configuration in which the cover member is vertically swung at the rear fulcrum, it is possible to easily configure a configuration in which the cover member can be changed between the closed posture and the open posture.

Then, when the cover member is changed to the open position, the divider is stored. As a result, when changing the posture of the cover member to the open posture, the divider is less likely to interfere with the work of changing the posture.

Further, in the present invention, a guide mechanism for guiding the cover member between the closed position and the open position is provided, and the guide mechanism includes a guide member having a guide hole extending in the front-rear direction, and one end portion. is swingably supported by the cover member, and the other end is supported by the guide member so as to be movable along the guide hole, and the guide hole corresponds to the open position. It is preferable that a locking portion for locking the other end of the rod-shaped member is formed in the portion where the rod-shaped member is engaged.

According to this characteristic configuration, the cover member is guided between the closed posture and the open posture by the guide mechanism, so that the posture of the cover member can be smoothly changed between the closed posture and the open posture. Further, the cover member can be stably held in the open position by locking the other end of the rod-shaped member to the locking portion.

Further, in the present invention, a frame for supporting the cover member is provided below the cover member, and a fixture for fixing the cover member in the closed posture across the front end portion of the cover member and the frame. is provided, and it is preferable that the fixture is covered from above by the divider in the state of the use posture and the divider is exposed in the state of the retracted posture.

According to this characteristic structure, the cover member can be stably held in the closed posture by fixing the cover member in the closed posture by the fixture. In addition, since the fixture is covered from above by the divider when the divider is in the use posture, the fixture can be protected from being damaged by coming into contact with the field during harvesting. . Furthermore, since the fixture is exposed when the divider is in the retracted posture, the fixture can be easily reached by changing the posture of the divider to the retracted posture.

It is a right side view showing a corn harvester. 1 is a plan view of a corn harvester; FIG. It is a bottom view which shows a pre-harvest processing apparatus. Fig. 10 is a bottom view of the harvesting unit; It is a front view which shows a pre-harvest processing apparatus. FIG. 4 is a plan view showing a harvesting unit; It is a right side sectional view showing a harvesting unit. It is a right view which shows a harvesting unit. FIG. 10 is a right side cross-sectional view showing a state in which the inner divider is in the retracted posture and the inner cover member is in the open posture; FIG. 11 is a front view showing a state in which the inner divider is in the retracted posture and the inner cover member is in the open posture; FIG. 10 is a right side cross-sectional view showing a state in which the inner divider is in the retracted posture and the inner cover member is in the closed posture; FIG. 10 is a front view showing a state in which the inner divider is in the retracted posture and the inner cover member is in the closed posture; FIG. 11 is a right side view showing a state in which the outer divider is in a retracted posture; It is right side sectional drawing which shows a grounding part.

A mode for carrying out the present invention will be described based on the drawings. In the following explanation, the direction of arrow F is "front of the aircraft", the direction of arrow B is "back of the aircraft", the direction of arrow L is "left of the aircraft", and the direction of arrow R is "right of the aircraft". "Direction".

[Overall Configuration of Corn Harvester]
Figures 1 and 2 show a corn harvester. This corn harvester is equipped with a traveling body 1. - 特許庁A traveling machine body 1 is provided with a machine body frame 2 and a crawler traveling device 3. - 特許庁A pre-harvest processing device 4 is provided in front of the traveling body 1 .

A threshing device 5 is provided for threshing (peeling and degraining) the corn tufts. A feeder 6 is provided across the pre-harvest treatment device 4 and the threshing device 5 to convey the corn bunches toward the threshing device 5 . The feeder 6 is supported on the front part of the threshing device 5 so as to be vertically swingable. A grain tank 7 for storing grains obtained by the threshing process is provided on the right side of the threshing device 5 . A driving cabin 8 is provided in front of the grain tank 7 . A grain discharging device 9 for discharging grains in the grain tank 7 is provided.

[Pre-harvest processing equipment]
As shown in FIGS. 1 to 6, the pre-harvest processing device 4 includes a plurality of harvesting units U, a raking auger 10, a plurality of cover members 11, a plurality of dividers 12, and left and right side covers 13. and a pre-harvest treatment frame 14 are provided. The pre-harvest processing frame 14 supports a plurality of harvesting units U, a raking auger 10, a plurality of cover members 11, a plurality of dividers 12, left and right side covers 13, and the like.

The left-right width W1 of the pre-harvest processing device 4 is wider than the left-right width W2 of the crawler traveling device 3 . On both left and right sides of the left and right width W1 of the pre-harvest processing device 4, portions protruding laterally outside the machine body beyond the left and right width W2 of the crawler traveling device 3 are secured.

The harvesting unit U is provided with left and right locking conveying devices 15 , left and right harvesting rolls 16 , a cutting device 17 and a harvesting unit frame 18 . In other words, the harvesting unit U including the left and right locking conveying devices 15, the left and right harvesting rolls 16, the cutting device 17, and the harvesting unit frame 18 is configured. In this embodiment, three harvesting units U are arranged in the horizontal direction. In one harvesting unit U, left and right harvesting rolls 16 are arranged between the left and right locking conveying devices 15 . The harvesting unit frame 18 supports the left and right retaining conveying devices 15, the left and right harvesting rolls 16, the cutting device 17, and the like.

The left and right lock-conveying devices 15 lock-convey the corn tufts rearward. Between the left and right locking conveying devices 15, a conveying path C is formed through which the corn tufts are conveyed. The locking conveying device 15 is composed of an endless rotating body type conveying device. The locked carrier device 15 includes a driven sprocket 19 provided at the front portion of the locked carrier device 15 , a driving sprocket 20 provided at the rear portion of the locked carrier device 15 , and a carrier wound around the driven sprocket 19 and the driving sprocket 20 . A chain 21 is provided. The conveying chain 21 is provided with a plurality of engaging portions 21a for engaging the corn tufts.

The left and right harvesting rolls 16 pull down the planted stalk introduced into the transport path C between the left and right locking transport devices 15 from both the left and right sides, thereby removing the corn clusters from the planted stalk. separate. The left harvesting roll 16 is provided below the left locking conveying device 15 while extending in the front-rear direction. The right harvesting roll 16 is provided below the right locking conveying device 15 while extending in the front-rear direction.

The harvesting roll 16 is provided with a spiral portion 22 that introduces the planted stem culm into the conveying path C, and a blade portion 23 that pulls down the planted stem culm. The blade portion 23 is composed of a plurality (four in this embodiment) of blades 23a. By sliding the blade body 23a in a direction orthogonal to the rotation axis Y1 direction of the harvesting roll 16, the amount of protrusion of the blade edge can be changed.

The cutting device 17 cuts the planting stalk. A cutting device 17 is provided below the right harvesting roll 16 . The cutting device 17 is composed of a rotary blade that is rotationally driven in the direction of the arrow A about the rotation axis Z1. However, the direction of rotation of the rotary blade may be opposite to the direction of the arrow A around the rotation axis Z1. The cutting device 17 is provided with a pair of free blades 24 and a support portion 25 that supports the pair of free blades 24 in a swingable manner.

The raking auger 10 rakes the corn bunches conveyed by the locking conveying device 15 toward the rear. The scraping auger 10 is provided behind the locking conveying device 15 . The raking augers 10 are installed on left and right side walls 26 of the pre-harvest processing frame 14 .

The pre-harvest processing frame 14 includes left and right side walls 26, a bottom plate 27 extending over the left and right side walls 26 and covering the raking auger 10 from below and from the rear, and left and right vertical frames 28 supporting the rear portion of the bottom plate 27. and is provided. The bottom plate 27 is provided with a bottom portion 27 a positioned below the raking auger 10 and a rear wall 27 b positioned behind the raking auger 10 .

As shown in FIGS. 4, 6 and 7, a connecting frame 29 is provided across one harvesting unit frame 18 and the other harvesting unit frame 18 of adjacent harvesting units U to connect them. The connecting frame 29 includes a front frame 30 , an upper intermediate frame 31 , a lower intermediate frame 32 and a rear frame 33 .

The front frame 30 is provided across the front portion of one harvesting unit frame 18 and the front portion of the other harvesting unit frame 18 in the harvesting units U adjacent to each other. The upper intermediate frame 31 is provided over the upper part of the front-rear intermediate part of one harvesting unit frame 18 and the upper part of the front-rear intermediate part of the other harvesting unit frame 18 in the adjacent harvesting units U. As shown in FIG. The lower intermediate frame 32 is provided across the lower front-rear intermediate portion of one harvesting unit frame 18 and the lower front-rear intermediate lower portion of the other harvesting unit frame 18 in the adjacent harvesting units U. As shown in FIG. The rear frame 33 is provided across the rear portion of one harvesting unit frame 18 and the rear portion of the other harvesting unit frame 18 in the harvesting units U adjacent to each other.

[Protective material]
As shown in FIGS. 3 to 6, below the front end of the locking carrier 15 and in front of the front end of the harvesting roll 16 , a guard is provided to protect the front end of the locking carrier 15 and the front end of the harvesting roll 16 . A member 34 is provided. In this embodiment, the pre-harvest processing device 4 is provided with four protective members 34 . Specifically, as the protection member 34, an outer protection member 35 positioned at the left end, an outer protection member 35 positioned at the right end, and left and right inner protection members 36 positioned between the left and right outer protection members 35 are provided. are provided. The left and right outer protection members 35 have a symmetrical configuration. The left and right inner protection members 36 have the same configuration.

The left outer protective member 35 is provided below the front end portion of the left locking conveying device 15 in the left end harvesting unit U and in front of the front end portion of the left harvesting roll 16 . The right outer protective member 35 is provided below the front end portion of the right locking conveying device 15 in the right end harvesting unit U and in front of the front end portion of the right harvesting roll 16 .

The left inner protection member 36 is positioned below the front end of the right locking transport device 15 in the left end harvesting unit U and in front of the front end of the right harvesting roll 16 and the left locking transport in the middle harvesting unit U. It extends below the front end of the device 15 and forward of the front end of the left harvest roll 16 . In other words, the left inner protection member 36 is provided over the transport path C in the harvesting unit U at the left end and the transport path C in the harvesting unit U in the middle. That is, the left inner protection member 36 is provided over one transport path C and the other transport path C in the adjacent harvesting units U. As shown in FIG.

The right inner protection member 36 is provided below the front end of the right locking transport device 15 in the middle harvesting unit U and in front of the front end of the right harvesting roll 16 and the left locking transport in the right end harvesting unit U. It extends below the front end of the device 15 and forward of the front end of the left harvest roll 16 . In other words, the right inner protection member 36 is provided over the transport path C in the middle harvesting unit U and the transport path C in the rightmost harvesting unit U. As shown in FIG. That is, the right inner protection member 36 is provided over one transport path C and the other transport path C in the adjacent harvesting units U. As shown in FIG.

The outer protective member 35 includes a front portion 35a, a bottom portion 35b, and side portions 35c. The bottom portion 35b is formed in an inclined shape that is inclined forward and upward. The lateral side portion 35c faces the conveying path C and is formed in an inclined shape so that the rear end of the lateral side portion 35c is closer to the conveying path C in the left-right direction. The outer protection member 35 is fixed to the front end of the harvesting unit frame 18 with bolts 37 .

The inner protective member 36 is provided with a front portion 36a, a bottom portion 36b, and left and right side portions 36c. The bottom portion 36b is formed in an inclined shape that is inclined forward and upward. The lateral side portion 36c faces the conveying path C and is formed in an inclined shape so that the rear end of the lateral side portion 36c is closer to the conveying path C in the left-right direction. The inner protection member 36 is fixed by bolts 37 to the front end portion of one harvesting unit frame 18 and the front end portion of the other harvesting unit frame 18 of the harvesting units U adjacent to each other.

[Cover member]
As shown in FIG. 2, the cover member 11 covers the locking and conveying device 15 from above. In this embodiment, the pre-harvest treatment device 4 is provided with four cover members 11 . Specifically, the cover member 11 includes an outer cover member 38 positioned at the left end, an outer cover member 38 positioned at the right end, and left and right inner cover members 39 positioned between the left and right outer cover members 38. are provided. The left and right outer cover members 38 have a symmetrical configuration. The left and right inner cover members 39 have the same configuration.

The left outer cover member 38 is provided above the left locking and conveying device 15 of the leftmost harvesting unit U so as to cover the left locking and conveying device 15 of the leftmost harvesting unit U from above. The right outer cover member 38 is provided above the right locking and conveying device 15 of the right end harvesting unit U so as to cover the right locking and conveying device 15 of the right end harvesting unit U from above.

The left inner cover member 39 covers the right locking conveying device 15 of the leftmost harvesting unit U and the left locking conveying device 15 of the middle harvesting unit U from above. It is provided above the locking transport device 15 and the left locking transport device 15 in the harvesting unit U in the middle. The right inner cover member 39 is mounted on the right side of the middle harvesting unit U so as to cover the right side locking and conveying device 15 of the middle harvesting unit U and the left side locking and conveying device 15 of the rightmost harvesting unit U from above. It is provided above the locking conveying device 15 and the left locking conveying device 15 in the harvesting unit U on the right end.

As shown in FIGS. 6 to 10, the inner cover member 39 swings up and down about a swing axis X1 as a second swing axis extending in the left-right direction with the rear portion of the inner cover member 39 as a fulcrum. By doing so, it is possible to change the posture between a closed posture (see FIGS. 7 and 8) that covers the locking and conveying device 15 from above and an open posture (see FIGS. 9 and 10) that opens the locking and conveying device 15 upward. It is configured. A front frame 30 , an upper intermediate frame 31 and a rear frame 33 are provided below the inner cover member 39 so as to support the inner cover member 39 . The rear frame 33 is provided with a support portion 40 that supports the rear end portion of the inner cover member 39 so that the inner cover member 39 can swing up and down about the swing axis X1.

A top portion of the inner cover member 39 is formed in a substantially mountain shape when viewed from the front. A top plate 39 d is provided on the upper portion inside the inner cover member 39 . A substantially cylindrical portion is formed in the upper portion of the inner cover member 39 by the upper surface portion of the inner cover member 39 and the top plate 39d. Thereby, the strength of the upper portion of the inner cover member 39 can be improved. Although detailed description is omitted, the upper portion of the outer cover member 38 is also formed with a substantially cylindrical portion in the same manner as the upper portion of the inner cover member 39 .

[Guide mechanism]
A guide mechanism 41 is provided to guide the inner cover member 39 between the closed posture and the open posture. The guide mechanism 41 includes a guide member 42 and a rod-like member 43 .
The guide member 42 is supported by the upper intermediate frame 31 . A guide hole 42a extending in the front-rear direction is formed in the guide member 42 . One end of the rod-like member 43 is supported inside the inner cover member 39 so as to be able to swing. Inside the inner cover member 39, a support portion 39a is provided that supports one end portion of the rod-shaped member 43 so as to be able to swing. The other end of the rod-shaped member 43 is supported by the guide member 42 so as to be movable along the guide hole 42a. An engaging portion 42b to which the other end of the rod-shaped member 43 is engaged is formed in a portion of the guide hole 42a corresponding to the open position.

As the inner cover member 39 swings upward about the swing axis X1, the other end of the rod-shaped member 43 moves forward along the guide hole 42a. When the inner cover member 39 is in the open position, the other end of the bar member 43 is locked by the locking part 42b, so that the inner cover member 39 is held in the open position.

〔Fixture〕
A fixture 44 is provided across the front end of the inner cover member 39 and the front frame 30 to fix the inner cover member 39 in the closed posture. A front end portion of the inner cover member 39 is provided with a hook portion 39b on which the fixture 44 is hooked.

The inner cover member 39 is fixed in the closed posture by hooking the fixture 44 on the hook portion 39b. By releasing the hooking of the fixing member 44 on the hooking portion 39b, the inner cover member 39 can be rocked upward about the rocking axis X1.

[divider]
As shown in FIGS. 2-5, the divider 12 introduces planting culms into the transport path. In this embodiment, the pre-harvest processing device 4 is provided with four dividers 12 . Specifically, the divider 12 includes an outer divider 45 positioned at the left end, an outer divider 45 positioned at the right end, and left and right inner dividers 46 positioned between the left and right outer dividers 45 . The left and right outer dividers 45 have a symmetrical configuration. The left and right inner dividers 46 have the same configuration.

The divider 12 includes a divider body 47 and a grounding portion 48 that can be grounded. A corner portion 47c is formed by the rising surface 47a and the inclined surface 47b of the divider body 47 so that the planting stem culm in the lodged state can be easily erected.

The left outer divider 45 is provided continuously with the front end portion of the left outer cover member 38 so as to protrude further forward than the left locking conveying device 15 in the left end harvesting unit U. As shown in FIG. The right outer divider 45 is provided continuously with the front end portion of the right outer cover member 38 so as to protrude further forward than the right locking conveying device 15 in the right end harvesting unit U. As shown in FIG.

The left inner divider 46 is continuous with the front end portion of the left inner cover member 39 and is positioned forward of the right locking conveying device 15 of the leftmost harvesting unit U and the left locking conveying device 15 of the middle harvesting unit U. It is provided in a state of protruding to the The right inner divider 46 is continuous with the front end of the right inner cover member 39 and is positioned forward of the right locking conveying device 15 of the middle harvesting unit U and the left locking conveying device 15 of the right end harvesting unit U. It is provided in a state of protruding to the

The left outer divider 45 and the left inner divider 46 introduce the planting stem culm into the transport path C in the left harvesting unit U. As shown in FIG. The planting stem culm is introduced into the conveying path C in the harvesting unit U in the middle by the left and right inner dividers 46 . The right inner divider 46 and the right outer divider 45 introduce the planting stem culm into the transport path C in the right harvesting unit U. As shown in FIG.

As shown in FIGS. 7, 8, 11, and 12, the inner divider 46 has a swing axis serving as a first swing axis extending in the left-right direction with the rear end of the inner divider 46 as a fulcrum. By swinging up and down around X2, a use posture (see FIGS. 7 and 8) located in front of the inner cover member 39 and a retracted posture (see FIGS. 11 and 12) located above the inner cover member 39. It is configured so that the posture can be changed to The inner divider 46 contacts the upper surface of the inner cover member 39 from above in the retracted posture. A support portion 39c that supports the rear end portion of the inner divider 46 is provided on the upper portion of the front end portion of the inner cover member 39 so that the inner divider 46 can swing up and down about the swing axis X2.

Here, the fixture 44 is covered from above by the inner divider 46 when the inner divider 46 is in the use posture, and is exposed when the inner divider 46 is in the stored posture. By exposing the fixing member 44 while the inner divider 46 is in the retracted posture, the hooking of the fixing member 44 to the hooking portion 39b can be released, and the inner cover member 39 can be changed to the open posture. That is, the inner cover member 39 is configured so that the posture can be changed to the open posture while the inner divider 46 is in the retracted posture.

As shown in FIG. 13 , the outer divider 45 swings up and down around a swing axis X2 extending in the left-right direction with the rear end of the outer divider 45 as a fulcrum, thereby moving forward of the outer cover member 38 . It is configured to be able to change its posture between a use posture in which it is located and a retracted posture in which it is located above the outer cover member 38 . The outer divider 45 is in contact with the upper surface of the side cover 13 from above in the retracted posture. A support portion 38a is provided on the upper portion of the front end portion of the outer cover member 38 to support the rear end portion of the outer divider 45 so that the outer divider 45 can swing up and down about the swing axis X2.

Here, as shown in FIGS. 8 and 13, the locking and conveying device 15 extends rearward from a position on the front side of the swing axis X2. The front end of the locking and conveying device 15 (the front end of the moving locus of the tip of the locking portion 21a) is positioned forward of the swing axis X2. In the front-rear direction, the position of the front portion of the locking and conveying device 15 overlaps the position of the rear portion of the divider 12 . The driven sprocket 19 is located forward of the pivot axis X2.

The harvesting roll 16 extends rearward from a position between the front end of the locking conveying device 15 and the swing axis X2. The front end of the spiral portion 22 is positioned forward of the swing axis X2 and rearward of the rotation axis Z2 of the driven sprocket 19 .

As shown in FIGS. 4 and 14 , the ground portion 48 is provided at the front end portion of the divider body portion 47 . A front end portion of the divider main body portion 47 is provided with a fitting portion 47d into which the grounding portion 48 is fitted. The grounding portion 48 is fixed by a bolt 49 while being fitted into the fitting portion 47d from below. That is, the grounding portion 48 is configured to be attachable/detachable to/from the divider body portion 47 .

The ground portion 48 is tapered in plan view. A bottom portion of the grounding portion 48 is formed in a curved shape that bulges downward when viewed from the side. During the harvesting operation, the grounding portion 48 is grounded and a pushing force acts on the divider 12, thereby causing the divider 12 to swing upward.

As shown in FIG. 7, an adjustment mechanism 50 is provided that can adjust the height position of the lower end of the divider 12 . FIG. 7 shows an adjusting mechanism 50 capable of adjusting the height position of the lower end of the inner divider 46. As shown in FIG. The adjustment mechanism 50 is provided with left and right contact members 51 provided at the rear end of the inner divider 46 and projecting toward the front end of the inner cover member 39 to contact the front end of the inner cover member 39 . . The contact member 51 is configured such that the amount of protrusion (the length of protrusion from the rear end of the inner divider 46 toward the front end of the inner cover member 39) can be changed. In this embodiment, the contact member 51 is configured by a bolt-shaped member. A nut 52 for fixing the position of the contact member 51 is fitted on the contact member 51 .

The height position of the lower end of the inner divider 46 is adjusted according to the amount of protrusion of the contact member 51 . Specifically, the height position of the lower end of the contact portion 48 is lowered by shortening the amount of protrusion of the contact member 51 . On the other hand, the height position of the lower end of the contact portion 48 is increased by increasing the amount of protrusion of the contact member 51 .

Note that although the adjustment mechanism 50 capable of adjusting the height position of the lower end of the inner divider 46 has been described here, the adjustment mechanism 50 capable of adjusting the height position of the lower end of the outer divider 45 can also be adjusted to the lower end of the inner divider 46 . can be understood in the same way as the adjustment mechanism 50 that can adjust the height position of the .

[Side cover]
As shown in FIGS. 2 and 5, the left side cover 13 is positioned behind the left outer divider 45 for the left locking and conveying device 15 (the left locking and conveying device 15) in the leftmost harvesting unit U. It is provided on the left side (left and right outward). the right side cover 13; It is provided behind the right outer divider 45 and to the right (left and right outer side) of the right locking and conveying device 15 (right end locking and conveying device 15) in the right end harvesting unit U.

As shown in FIG. 13, the side cover 13 includes a body cover portion 53 and an upper cover portion 54 that covers the body cover portion 53 from above. The upper cover portion 54 is configured to be vertically swingable about a swing axis X3 extending in the left-right direction with the front end portion of the upper cover portion 54 as a fulcrum. A support portion 38b that supports the front end portion of the upper cover portion 54 is provided on the upper portion of the outer cover member 38 so that the upper cover portion 54 can swing up and down about the swing axis X3.

A height changing mechanism 55 capable of changing the height of the side cover 13 is provided. The height changing mechanism 55 includes front and rear bolts 56 provided across the lateral sides of the upper cover portion 54 and the lateral sides of the main body cover portion 53, and bolts 56 formed on the lateral sides of the upper cover portion 54. The front and rear long holes 54a into which the 56 are inserted are provided. The height of the side cover 13 is changed by swinging the upper cover part 54 up and down within the range of the long hole 54a.

[Another embodiment]

( 1 ) In the above embodiment, the engagement portion 42b is formed in the portion of the guide hole 42a corresponding to the open posture. However, the engaging portion 42b may not be formed in the portion of the guide hole 42a corresponding to the open posture. Alternatively, instead of the guide hole 42a, the guide member 42 may be formed with a locking hole in which the other end of the rod-shaped member 43 is locked in the open posture.

( 2 ) In the above embodiment, the fixture 44 is configured by a member that can be hooked on the hook portion 39b. However, the fixture 44 may be configured by a bolt that fixes the front end of the inner cover member 39 to the front frame 30 .

( 3 ) It should be noted that the present invention is not limited to the above-described embodiment and the above-described another embodiment, and various other modifications are possible. In addition, it is also possible to combine the configurations according to the above embodiment and the above another embodiment as long as there is no contradiction.

INDUSTRIAL APPLICABILITY The present invention is applicable to a pre-harvest treatment device for a corn harvester.

4 Pre-harvest processing device 11 Cover member 12 Divider 15 Locking and conveying device 16 Harvesting roll 30 Front frame (frame)
41 Guide Mechanism 42 Guide Member 42a Guide Hole 42b Engaging Portion 43 Rod-shaped Member 44 Fixture C Conveyance Path X2 Swing Axis X3 Swing Axis

Claims (3)

left and right locking and conveying devices for locking and conveying the corn tufts rearward;
The planting stem culm provided below the locking and conveying device and introduced into the conveying path between the left and right locking and conveying devices is pulled down from both the left and right sides, whereby the planting stalk culm is removed from the left and right harvest rolls separating the corn tufts;
a scraping auger provided behind the locking and conveying device for laterally conveying the corn tufts;
Left and right cover members provided above the locking and conveying device to cover the locking and conveying device from above;
a left and right divider that is continuous with the front end portion of the cover member and protrudes forward from the locking and conveying device, and that introduces the planting stalk into the conveying path;
The divider is configured to be changeable between a use posture positioned in front of the cover member and a retracted posture positioned above the cover member,
the cover member is capable of changing its posture between a closed posture that covers the locking and conveying device from above and an open posture that opens the locking and conveying device upward;
The divider swings around a first swing axis extending in the left-right direction with the rear portion of the divider serving as a fulcrum, and is changeable between the use posture and the retracted posture, and the use posture. and the stored posture, the posture is changed so that the front and back directions are reversed,
the cover member swings around a second swing axis extending in the left-right direction with the rear portion of the cover member serving as a fulcrum, so that the posture can be changed between the closed posture and the open posture;
When the divider is in the retracted posture and is in contact with the upper surface of the cover member , when the cover member is changed to the open posture, the distal end portion of the divider overlaps the scraping auger in a side view. pre-harvest treatment equipment for corn harvesters. a guide mechanism for guiding the cover member between the closed posture and the open posture;
The guide mechanism includes a guide member having a guide hole extending in the front-rear direction, one end of which is swingably supported by the cover member, and the other end of which is movable along the guide hole by the guide member. and a rod-shaped member to be supported,
2. The pre-harvest treatment device for a corn harvester according to claim 1, wherein a locking portion for locking said other end of said rod-like member is formed in a portion of said guide hole corresponding to said open posture. A frame supporting the cover member is provided below the cover member,
A fixture for fixing the cover member in the closed posture is provided across the front end portion of the cover member and the frame,
3. The pre-harvest treatment of the corn harvester according to claim 1 or 2, wherein the fixture is covered from above by the divider in the state of the use posture, and the divider is exposed in the state of the storage posture. Device.

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