JP2024004955A - Combine-harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine-harvester which can reduce vibration generated in a grass-dividing guide and suppress breakage of the grass-dividing guide due to the vibration.

SOLUTION: A reaping unit 4 comprises: a plurality of grass-dividing tools 9 which is provided on a tip of a lower part of the reaping unit 4 and divides plant foot side portions of planted grain culm; a plurality of raising devices which is arrayed along a machine body left-right direction and raises the planted grain culm divided by the grass-dividing tools 9; a grass-dividing guide 40 which extends to a height higher than ear tips of the planted grain culm from a height lower than ear tips of the planted grain culm at the machine body left-right direction position corresponding to the grass-dividing tool 9 and acts on the planted grain culm prior to the raising devices to divide the ear tip side portions of the planted grain culm; and a support frame 25 which extends along the machine body left-right direction so as to reach upper parts of the plurality of raising devices and supports the plurality of raising devices. An upper end part of the grass-dividing guide 40 is connected to the support frame 25.

SELECTED DRAWING: Figure 5

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a combine harvester.

As a conventional combine harvester, for example, as described in Patent Document 1, there is a weeding tool that weeds the stock side part of the planted grain culm, and a weeding tool that weeds the ear side part of the planted grain culm to the left and right. There is a weeding guide and what is provided.

JP 2019-141017 Publication

Generally, large vibrations are likely to occur at the front end of a rod-shaped frame due to engine drive, reaping work, etc. In the conventional combine harvester, as described in Patent Document 1, a grass cutting guide was supported at the front end of a rod-shaped grass cutting support frame that extended forward at the front end side of the cutting section. There was something. The grass cutting guide supported by the front end of the grass cutting support frame is likely to generate large vibrations, and there is a risk that the grass cutting guide may be damaged due to this vibration.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a combine harvester that can reduce the vibrations generated in the weeding guide and make it difficult for the weeding guide to be damaged due to vibration.

The combine harvester of the present invention is a combine equipped with a reaping section for reaping a planted grain culm, and the reaping section is provided at a lower tip of the reaping section to cut off a stock side portion of the planted grain culm. A plurality of weed cutting tools that separate the grass; a plurality of pulling devices that are arranged along the left and right directions of the machine and which trigger the planted grain culms that have been separated by the grass cutting tools; In the directional position, it extends from a height lower than the tip of the planted grain culm to a height higher than the tip of the planted grain culm, and acts on the planted grain culm before the pulling device to cause the planting grain culm to rise. The grass cutting guide includes a grass cutting guide that separates the grass tip side portion to the left and right, and a support frame that extends along the left-right direction of the machine body so as to cover the upper part of the plurality of pulling devices and supports the plurality of pulling devices. , an upper end of the weeding guide is connected to the support frame.

According to the invention, the weeding guide is connected to a support frame that is rigidly constructed to support a plurality of pulling devices. Generally, a strongly constructed support frame is unlikely to be subject to large vibrations due to engine drive, reaping operations, etc. A grass cutting guide connected to such a support frame is less likely to experience large vibrations. As a result, the weeding guide is less likely to be damaged by vibration.

In the present invention, the pulling device is provided with a plurality of pulling claws that move upward along a pulling path through which the planted grain culm passes and act to raise the planted grain culm, and Preferably, the device is provided with an inclined guide portion that is inclined so that the upper side is located closer to the pulling path when viewed from the front.

According to this configuration, the inclined guide part is inclined so that the upper side is located closer to the pulling route, so that the lower part of the grass cutting guide than the inclined guide part is located closer to the pulling route. placed at a distance from. As a result, the planted grain culm that has been weeded by the weeding guide will be guided to a position away from the pulling path, reducing the possibility that the tip of the planted grain culm will enter the pulling path. can do.

In the present invention, it is preferable that the inclined guide portion overlaps the pulling path when viewed from the front.

According to this configuration, it is possible to arrange the inclined guide portion toward the support frame by utilizing the pulling path, that is, the space for the planted grain culms to pass, so that the weeding guide can be moved toward the support frame. There is no need to change the design to connect to the

In the present invention, the lifting device includes an upper rotating body provided at an upper part of the lifting device, a lower rotating body provided at a lower part of the lifting device, the upper rotating body and the lower rotating body. a pulling chain wound around the upper rotating body and having the plurality of lifting pawls attached thereto, and the inclined guide section is arranged above the rotational axis of the upper rotary body to connect the lifting chain to the plurality of lifting pawls. It is preferable that the route overlaps with the route.

According to this configuration, since the inclined guide portion overlaps with the lifting path above the rotational axis of the upper rotary body around which the lifting chain is wound, the lifting action by the lifting pawl in the lifting path is The inclined guide portion will be located above the range covered by. As a result, it is possible to reduce the possibility that the planted grain culm pulled up by the pulling device collides with the inclined guide part.

In the present invention, the weeding guide is provided with a vertical guide portion extending upward from a height lower than the tip of the planted grain culm when viewed from the front, at a position in the left-right direction of the machine body corresponding to the weeding tool. Preferably, a lower end of the inclined guide part is connected to an upper end of the vertical guide part.

According to this configuration, since the vertical guide portion extends upward from a height lower than the tip of the planted grain culm, even when reaping a short planted grain culm, the planted grain can be properly controlled. The tip side of the culm can be divided to the left and right. Moreover, since the lower end of the inclined guide part is connected to the upper end of the vertical guide part, the inclined guide part and the vertical guide part can be constructed from one member. As a result, compared to the case where the inclined guide part and the vertical guide part are constructed from separate members, it is possible to reduce the number of installation steps.

In the present invention, the reaping section is provided with a cover that covers the support frame from the front, and a portion of the cover located above the pulling path through which the planted grain culm passes is arranged upward in front view. Preferably, the weeding guide is recessed to form a recess, and the upper end of the weeding guide is passed through the range of the recess and connected to the support frame.

According to this configuration, since the part of the cover corresponding to the lifting path is provided with the recessed part that recesses upward, even when reaping a tall planted grain culm, the planted grain culm can be harvested easily. Collision of the tip of the culm with the cover can be reduced. Furthermore, by passing the upper end of the weeding guide within the range of the recess, it becomes possible to connect the upper end of the weeding guide to the support frame using the recess.

In the present invention, a driving section is provided behind the reaping section, and the weeding guide has a height lower than the tip of the planted grain culm when viewed from the front at a position in the left-right direction of the machine body corresponding to the weeding tool. It is preferable that a vertical guide portion is provided that extends upward from the weeding tool, and the vertical guide portion extends upward from the weeding tool.

According to this configuration, since the vertical guide portion extends upward from a height lower than the tip of the planted grain culm, the tip side portion of the planted grain culm can be more suitably separated to the left and right. Can be done. In addition, since the vertical guide part of the weeding guide extends upward from the weeding tool, the operator riding in the driving part located behind the cutting part can easily check the vertical guide part. You can easily check the left and right positions of grass tools.

In the present invention, it is preferable that a through hole passing through the weeding tool vertically is formed, and a lower end portion of the vertical guide portion is inserted into the through hole.

According to this configuration, even if vibrations occur in the weeding implement due to vibrations of the engine or the like, the vibrations can be suppressed because the lower end of the vertical guide portion comes into contact with the edge of the through hole. In addition, since there is no gap between the weeding tool and the weeding guide, it is possible to prevent the inconvenience of the planted grain culm that should be weeded by the weeding guide passing through the gap and not being guided by the weeding guide. becomes possible.

In the present invention, a grass cutting frame that supports the grass cutting tool is provided at a lower part of the cutting section, and the grass cutting tool is movable from the grass cutting frame to the left and right about a vertical swing axis. It is preferable that the through hole vertically penetrates the weeding tool along the swing axis.

According to this configuration, the through hole passes through the weeding tool vertically along the swing axis, so that when changing the swing angle of the weeding tool, the through hole passes through the weeding tool vertically along the swing axis. It rotates without changing its relative position. As a result, the swinging angle of the weeding tool can be changed without interference between the lower end of the weeding guide that penetrates the through-hole and the through-hole.

In the present invention, it is preferable that the weeding guide is made of a round pipe material, and the lower end of the vertical guide part is formed in a shape obtained by crushing the round pipe material and is inserted into the through hole. It is.

According to this configuration, the weeding guide is made of round pipe material to be durable, and the lower end of the vertical guide part is formed in the shape of crushed round pipe material, so the round pipe material is It becomes possible to configure the weed guide to be smaller than the size of the through hole, and the weed guide can be configured, for example, from a round pipe material having a diameter larger than the diameter of the through hole. As a result, even if the weeding guide is made of a round pipe material having a large diameter in order to increase the strength of the weeding guide, there is no need to make a design change such as increasing the diameter of the through hole of the weeding tool.

In the present invention, it is preferable that the weeding guide is disposed on the rear side of the front end of the weeding tool.

According to this configuration, the planted grain culm can be moved to a lower position of the planted grain culm by the weeding tool that weeds the root side of the planted grain culm and the weeding guide that weeds the ear side part of the planted grain culm. Grass will be smoothly divided from the ground to a higher position.

It is a left side view showing a combine. It is a top view showing a combine. It is a front view of a combine. FIG. 3 is a front view showing the structure of the weeding guide. It is a left side view showing the front lower part of a reaping part. It is a figure showing the composition of the main part and support part (adjustment mechanism) of a weeding tool.

Embodiments for carrying out the present invention will be described based on the drawings. In the following explanation, unless otherwise specified, the direction of arrow F in the figure is "front", the direction of arrow B is "rear", the direction of arrow L is "left", and the direction of arrow R is "front". Let's say "right". Further, the direction of arrow U in the figure is "up" and the direction of arrow D is "down."

[Overall configuration of combine harvester]
1 to 3 show a self-detachable combine harvester (corresponding to the "combine harvester" according to the present invention). As shown in FIGS. 1 to 3, this combine harvester is equipped with a traveling machine body 1. The traveling body 1 includes a crawler traveling device 2 and a body frame 3 supported by the crawler traveling device 2. A reaping section 4 for reaping planted grain culms is provided in front of the traveling machine body 1. A driving cabin 5 is provided behind the reaping section 4.

[Driving cabin]
As shown in FIGS. 2 and 3, the driving cabin 5 includes a driving section 5A in which a driver rides, and a cabin section 5B that covers the driving section 5A. The driving section 5A is equipped with a driver's seat 28 on which a driver is seated.

An engine (not shown) is provided below the operating cabin 5. A grain storage tank 6 is provided at the rear of the operating cabin 5 to store grains after threshing. A threshing device 7 for threshing the harvested grain culm from the reaping section 4 is provided behind the reaping section 4. A grain discharge device 8 that discharges grains from the grain storage tank 6 is connected to the grain storage tank 6 .

[Reaping section]
The reaping section 4 is configured to be vertically swingable between a lowered working position where the planted grain culms are reaped and an elevated non-working position where the planted grain culms are not reaped. In the following description, a case will be described in which the reaping section 4 is in the lowered working position.

As shown in FIGS. 1 to 3, the reaping section 4 is configured to have multiple cutting specifications (in this embodiment, seven row cutting specifications). The reaping section 4 includes a plurality of (eight in this embodiment) weeding tools 9 that are provided at the tip of the lower part of the reaping section 4 and for weeding the plant base side portion of the planted grain culm, and A raising part 10 that causes the planted grain culm that has been divided by the tool 9, a cutting blade device 11 that cuts the planted grain culm caused by the pulling part 10, and a cutting grain that has been cut by the cutting blade device 11. A grain culm conveying section 12 that conveys the culms toward the rear of the machine body is provided. Side covers 13 are provided on both left and right sides of the reaping section 4, respectively. Each weeding tool 9 is supported by a weeding frame 14 provided at the lower part of the cutting section 4, respectively. In the following description, the eight weeding tools 9 will be referred to as first to eighth weeding tools 9 in order from the left side.

Here, as shown in FIG. 5, the grain culm transport unit 12 includes a transport device 60 that grips the base of the harvested grain culm and transports it rearward. The conveyance device 60 includes a packer 61A for raking in grain culms, and a belt with protrusions 61B for raking in grain culms. Further, the conveying device 60 includes a stock head conveying mechanism 62 and a tip conveying mechanism 63. The stock head transport mechanism 62 pinches and transports the stock head of the harvested grain culm. The ear tip conveyance mechanism 63 locks and conveys the ear tip of the harvested grain culm.

[Lifting part]
As shown in FIGS. 2 to 4, the pulling part 10 includes a plurality of (in this embodiment, seven) planting grain culms that are lined up along the left-right direction of the machine body and that cause the planted grain culms to be weeded by the weeding tool 9. ), a raising drive shaft 17 to which the driving force for raising and driving the raising part 10 is transmitted, and a plurality of (in this embodiment, 4) raising paths 18 are provided.

The lifting portion 10 is provided with a support frame 25 that extends along the left-right direction of the aircraft body so as to cover the upper portions of the plurality of lifting devices 16 . The support frame 25 is constructed by bending a plate material into an angle shape, and has an upper surface portion located above the lifting drive shaft 17 and a vertical surface portion located behind the lifting drive shaft 17. Each of the lifting devices 16 is supported by a support frame 25 at its upper end portion. In the following description, the seven lifting devices 16 will be referred to as first to seventh lifting devices 16 in order from the left side.

The hoisting path 18 is formed between the hoisting devices 16 adjacent to each other in the left-right direction of the machine body. The four pulling paths 18 will be referred to as first to fourth pulling paths 18 in order from the left side.

The lifting device 16 is provided in a posture tilted backwards when viewed from the side. The pulling device 16 is equipped with a pulling chain 19 and a number of lifting claws 20 that are attached to the lifting chain 19 and act to raise the planted grain culm. Further, the pulling device 16 includes a drive sprocket 21 (corresponding to the "upper rotating body" according to the present invention) provided at the top of the lifting device 16, a tension sprocket 22, and a drive sprocket 21 provided at the bottom of the lifting device 16. A lifting chain 19 is wound around these rollers 23 (corresponding to the "lower rotating body" according to the present invention). Furthermore, a lifting cover 24 that covers the lifting chain 19, drive sprocket 21, tension sprocket 22, and roller 23 from the front is provided.

The lifting pawl 20 is attached to the lifting chain 19 so as to be able to rise and fall relative to the lifting chain 19. The lifting device 16 assumes a standing posture in which the lifting claw 20 stands up against the lifting chain 19 in the lifting path 18 that causes the planted grain culm, and in the non-lifting path that does not cause the planted grain culm. It is configured so that the claw 20 is in a laid down position with respect to the lifting chain 19. The raising claw 20 moves upward on the raising route 18 through which the planted grain culm passes, and the raising claw 20 acts to raise the planted grain culm, so that the planted grain culm is raised and introduced into the route 18. will be done.

The first lifting path 18 is formed between the lifting path side portion of the first lifting device 16 and the lifting path side portion of the second lifting device 16. The planted grain culms raised by the first pulling device 16 and the planted grain culms raised by the second pulling device 16 pass through the first pulling path 18 .

The second lifting path 18 is formed between the non-lifting path side portion of the second lifting device 16 and the third lifting path side portion. The planted grain culm raised by the third pulling device 16 passes through the second pulling path 18 .

The third lifting path 18 is formed between the lifting path side portion of the fourth lifting device 16 and the lifting path side portion of the fifth lifting device 16. The planted grain culms raised by the fourth pulling device 16 and the planted grain culms raised by the fifth pulling device 16 pass through the third pulling path 18 .

The fourth lifting path 18 is formed between the lifting path side portion of the sixth lifting device 16 and the lifting path side portion of the seventh lifting device 16. The planted grain culms raised by the sixth pulling device 16 and the planted grain culms raised by the seventh pulling device 16 pass through the fourth pulling path 18 .

The lifting drive shaft 17 is provided across the upper end portions of the first to seventh lifting devices 16 so that driving force can be transmitted to each lifting device 16. That is, the lifting drive shaft 17 is provided at the upper end of the lifting portion 10 so as to extend along the left-right direction of the machine body. The lifting drive shaft 17 is configured to be rotatable around a rotation axis X1 extending along the left-right direction of the machine body. A transmission case 27 for transmitting the power of the lifting drive shaft 17 to the lifting device 16 is provided between the lifting drive shaft 17 and each lifting device 16, respectively. The power of the lifting drive shaft 17 is transmitted to each pulling device 16 (each driving sprocket 21) via each transmission case 27 and the like.

The lifting portion 10 has an upper cover 26 (corresponding to the "cover" according to the present invention) that covers the lifting drive shaft 17 and the support frame 25 from the front. The upper cover 26 is formed with a recess 26a in which a portion of the upper cover 26 located above the pulling path 18 through which the planted grain culm passes is recessed upward in a front view.

[Weeding tool]
As shown in FIGS. 2 and 3, the first, third, fourth, sixth, and eighth weeding tools 9 are constructed of large-sized weeding tools 9. The second, fifth, and seventh weeding tools 9 are constituted by small-sized weeding tools 9. When performing the mowing work, the weeding tool 9 is located at a height corresponding to the base of the planted grain culm, and is located in front of the raising part 10 in side view.

As shown in FIG. 5, the weeding tool 9 includes a main body part 9a for weeding the planted grain culms to be reaped, and a support part 9b for supporting the main body part 9a and attached to the weeding frame 14. There is. A connecting portion 9c that connects the main body portion 9a and the supporting portion 9b is provided in front of the supporting portion 9b.

As shown in FIG. 6, the support portions 9b of the first and eighth weeding tools 9, which are located at the outermost ends of the plurality of weeding tools 9, are configured to swing around a vertical swinging axis X3. An adjustment mechanism 30 is provided that allows the angle to be adjusted. In other words, the weeding tool 9 is supported by the weeding frame 14 so as to be swingable from side to side about the vertical swinging axis X3 by the support portion 9b provided with the adjustment mechanism 30.

The adjustment mechanism 30 includes a contact portion 31 that contacts the upper surface portion of the weeding frame 14, a swinging shaft member 32 that extends vertically and serves as a swinging axis X3 for adjusting the weeding tool 9, and The adjustment fixing member 33 extends to fix the weeding tool 9 at a predetermined swing angle.

The contact portion 31 has a swing shaft hole 31a through which the swing shaft member 32 is inserted, a first adjustment hole 31b formed on the rear side of the swing shaft hole 31a, and a first adjustment hole 31b formed on the left and right side of the machine than the first adjustment hole 31b. A second adjustment hole 31c formed on the outside in the direction is formed.

The swing shaft member 32 is a bolt that can be tightened and fixed. The swing shaft member 32 is inserted into a swing shaft hole 31a formed in the contact portion 31, and is tightened and fixed in a tightening hole (not shown) formed in the upper surface of the weeding frame 14.

The adjustment fixing member 33 is a bolt that can be tightened and fixed. The adjustment and fixing member 33 is inserted into a first adjustment hole 31b or a second adjustment hole 31c formed in the contact portion 31, and is tightened and fixed in a tightening hole formed in the upper surface of the grass dividing frame 14.

When the swing shaft member 32 is loosened and the adjustment fixing member 33 is removed, the weeding tool 9 becomes swingable with the swing shaft member 32 as the swing axis X3. In this state, the first adjustment hole 31b or the second adjustment hole 31c is aligned with the tightening hole formed on the upper surface of the weeding frame 14, and is tightened and fixed using the adjustment fixing member 33, and then the swing shaft member 32 Tighten and secure. At this time, the swing angle of the weeding tool 9 can be adjusted by selecting either the first adjustment hole 31b or the second adjustment hole 31c. Note that when the second adjustment hole 31c is selected, the front end of the weeding tool 9 is fixed in a state tilted outward in the left-right direction of the machine compared to when the first adjustment hole 31b is selected.

[Grass division guide]
As shown in FIGS. 2 and 3, the reaping unit 4 includes a weeding guide 40 that acts on the planted grain culm before the pulling device 16 and divides the ear side portion of the planted grain culm to the left and right. It is equipped. The weed guide 40 is made of round pipe material. The weeding guide 40 is provided at a position in the left-right direction of the machine corresponding to the weeding tool 9. As shown in FIG. 5, the weeding guide 40 is disposed on the rear side of the front end of the first weeding tool 9, and extends from a height lower than the tip of the planted grain culm. Extends to great heights. In the present embodiment, as shown in FIGS. 2 and 3, a weeding guide 40 is provided at a position in the left-right direction of the machine corresponding to a first weeding tool 9 located at the leftmost end of the plurality of weeding tools 9. ing. The upper end of the weeding guide 40 is passed through the recess 26a of the upper cover 26 and connected to the support frame 25.

As shown in FIGS. 4 and 5, the weeding guide 40 is provided with a weeding guide 40 that, at a position in the left-right direction of the machine body corresponding to the first weeding tool 9, starts from a height lower than the tip of the planted grain culm when viewed from the front. A vertical guide part 41 extends toward the grass, an inclined guide part 42 is provided on the upper part of the weeding guide 40, and the inclined guide part 42 is inclined so that the upper side is located on the first pulling path 18 side when viewed from the front; The weed cutting guide 40 has a front-back direction extending portion 43 that extends in the front-rear direction, and a mounting portion 44 that is provided at the upper end of the weed cutting guide 40 and allows the grass cutting guide 40 to be attached to the support frame 25.

Note that the weeding guide 40 is not fixed to the weeding tool 9 but is supported only by the support frame 25.

The vertical guide portion 41 extends upward from the first weeding tool 9. The vertical guide part 41 includes a first vertical guide part 41a that is located at the lower end of the weeding guide 40 and extends from the rear side of the first weeding tool 9 toward the upper right, and a first vertical guide part 41a. It has a second vertical guide part 41b extending upward and backward from the upper end, and a third vertical guide part 41c extending upward from the upper end of the second vertical guide part 41b.

Moreover, between the first vertical guide part 41a and the second vertical guide part 41b, between the second vertical guide part 41b and the third vertical guide part 41c, and between the third vertical guide part 41c and the inclined guide part 42. A bent portion is formed between the inclined guide portion 42 and the longitudinally extending portion 43, respectively.

The first vertical guide portion 41a is configured such that the lower side is located laterally outward when viewed from the front, and the first vertical guide portion 41a is configured such that the lower side is positioned further forward when viewed from the side. Here, a through hole 34 is formed in the first weeding tool 9, which is arranged above the support part 9b and vertically passes through the first weeding tool 9 along the swing axis X3. . The first vertical guide portion 41a serving as the lower end portion of the weeding guide 40 extends linearly, is formed in the shape of a crushed round pipe material, and is inserted into the through hole 34. Specifically, a through hole 34 is provided in the rear portion of the main body portion 9a of the first weeding tool 9. The through hole 34 is formed into a long hole shape having a long axis and a short axis. The first vertical guide portion 41a is crushed from left and right and has a cross-sectional shape having a major axis and a minor axis. The first vertical guide part 41a is arranged to pass through the through hole 34, with the major axis of the through hole 34 extending in the direction along the major axis of the cross-sectional shape of the first vertical guide part 41a.

The second vertical guide portion 41b extends linearly along the vertical direction of the body at a position corresponding to the left edge of the lifting cover 24 of the seventh lifting device 16 when viewed from the front. In addition, when viewed from the side, the second vertical guide portion 41b is configured to be inclined such that the upper side is positioned further backward.

The third vertical guide portion 41c extends linearly in the same direction as the second vertical guide portion 41b at a position corresponding to the left edge of the lifting cover 24 of the seventh lifting device 16 when viewed from the front. ing. Further, in a side view, the third vertical guide part 41c is inclined so that the upper side is positioned further backward, and the third vertical guide part 41c is configured to have a steeper inclination than the second vertical guide part 41b.

A lower end portion of the inclined guide portion 42 is connected to an upper end portion of the vertical guide portion 41. The inclined guide part 42 extends in an inclined shape from the upper end of the third vertical guide part 41c so as to be located closer to the lateral inner side of the fuselage as seen from the upper end of the third vertical guide part 41c, and above the rotation axis X2 of the drive sprocket 21. It overlaps with the first raising path 18. Further, in side view, the inclined guide portion 42 is inclined so as to be located upward toward the rear, and extends linearly.

The longitudinally extending portion 43 extends rearward from the upper end of the inclined guide portion 42 . The longitudinally extending portion 43 passes below the lifting drive shaft 17 and extends linearly to a position corresponding to the lower end edge of the support frame 25 .

The attachment part 44 is formed at the rear end of the longitudinally extending part 43. The attachment part 44 is formed in a rectangular shape, and a bolt hole is formed in the upper part of the connection point with the longitudinally extending part 43. The weeding guide 40 is fixed to a vertical surface portion of the support frame 25 located behind the lifting drive shaft 17 by a bolt inserted into the bolt hole. The attachment portion 44 is disposed in a recess 26a formed in a portion of the upper cover 26 that corresponds to the first lifting path 18 when viewed from the front.

[Another embodiment]
Hereinafter, another embodiment that is a modification of the above embodiment will be exemplified.

(1) In the above embodiment, the weeding guide 40 is provided at a position in the horizontal direction of the machine corresponding to the first weeding tool 9, but the present invention is limited to the above embodiment. The grass cutting guide 40 may be provided at a position in the left and right direction of the machine corresponding to any one of the plurality of grass cutting tools 9, and a plurality of grass cutting guides 40 may be provided. It is also possible to have a configuration in which

(2) In the above embodiment, the weeding guide 40 is provided with the inclined guide part 42 that is inclined so as to be located on the pulling path side, but it is not provided with the inclined guide part 42 and is It may be configured so that it does not visually overlap the pulling path 18. At this time, for example, the weed guide 40 may be attached to the support frame 25 above the lifting cover 24 of the seventh pulling device 16.

(3) In the above embodiment, the inclined guide portion 42 overlaps with the first pulling path 18 above the rotation axis X2 of the drive sprocket 21, but the present invention The present invention is not limited to the above embodiment, and the inclined guide portion 42 may be configured to overlap the first lifting path 18 below the rotation axis X2 of the drive sprocket 21.

(4) In the above embodiment, the first vertical guide part 41a, the second vertical guide part 41b, the third vertical guide part 41c, and the inclined guide part 42 are explained as extending in a straight line. The present invention is not limited to the above embodiments, and may be configured in a curved shape.

(5) In the above embodiment, a configuration including the upper cover 26 has been described as an example, but a configuration without the upper cover 26 may be adopted. Further, in the above embodiment, the upper cover 26 has been described as having a configuration including the recess 26a, but the upper cover 26 may have a configuration without the recess 26a.

(6) In the above embodiment, the vertical guide portion 41 is arranged above the weeding tool 9 when viewed from the front. However, the present invention is not limited to the above embodiment, and for example, , it may be arranged laterally outward than the weeding tool 9 when viewed from the front.

(7) In the above embodiment, the vertical guide portion 41 is arranged on the rear side of the front end of the weeding tool 9. However, the present invention is not limited to the above embodiment. For example, the vertical guide portion 41 may be arranged at a position corresponding to the front end of the weeding tool 9.

(8) In the above embodiment, the through hole 34 is formed to vertically penetrate the weeding tool 9 along the swing axis X3. However, the through hole 34 may be formed at a position different from the position along the swing axis X3. Further, the weeding tool 9 may have a configuration in which the through hole 34 is not formed.

(9) In the above embodiment, the lower end of the vertical guide part 41 is inserted into the through hole 34. However, the present invention is not limited to the above embodiment. The lower end of the weeding tool 9 may be located above the weeding tool 9 and not inserted into the through hole 34.

(10) In the above embodiment, the support portions 9b of the first and eighth weeding tools 9 are provided with the adjustment mechanism 30, but the present invention is limited to the above embodiment. Instead, for example, the support portions 9b of all the weeding tools 9 may be provided with the adjustment mechanism 30, or the support portions 9b of the weeding tool 9 may not be provided with the adjustment mechanism 30. It may also be a configuration.

(11) In the above embodiment, the weeding guide 40 is made of a round pipe material, but the present invention is not limited to the above embodiment. It may be constituted by a member.

Note that the configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments as long as no contradiction occurs. Further, the embodiments disclosed in this specification are illustrative, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the purpose of the present invention.

INDUSTRIAL APPLICATION This invention can be utilized for a self-removal type combine harvester.

4: Reaping section 5A: Driving section 9: Weeding tool 14: Grass cutting frame 16: Pulling device 18: Pulling path 19: Pulling chain 20: Pulling claw 25: Support frame 26: Upper cover (cover)
26a: Recessed portion 34: Through hole 40: Weeding guide 41: Vertical guide portion 42: Inclined guide portion X2: Rotation axis X3: Swing axis

Claims (11)

A combine harvester equipped with a reaping section for reaping planted grain culms,
The reaping section includes a plurality of weeding tools that are provided at the tip of the lower part of the reaping section and for weeding the plant base side portion of the planted grain culm, and a plurality of weeding tools that are arranged along the left and right direction of the machine body. A plurality of pulling devices that raise the planted grain culm that has been weeded by the machine, and a plurality of pulling devices that raise the planted grain culm that have been weeded by the weeding tool, and a plurality of pulling devices that raise the planted grain culm that has been weeded by a weeding guide that extends to a high height and acts on the planted grain culm before the pulling device to weed the ear tip side portion of the planted grain culm to the left and right; a support frame extending along the left-right direction of the aircraft body and supporting the plurality of lifting devices;
In the combine harvester, an upper end portion of the weeding guide is connected to the support frame. The pulling device is provided with a plurality of lifting claws that move upward along a pulling path through which the planted grain culm passes and act on the planted grain culm to raise it,
2. The combine harvester according to claim 1, wherein an inclined guide section is provided on the upper part of the weeding guide so that the upper side is located closer to the pulling route when viewed from the front. The combine harvester according to claim 2, wherein the inclined guide portion overlaps the pulling path when viewed from the front. The lifting device is wound around an upper rotating body provided at an upper part of the lifting device, a lower rotating body provided at a lower part of the lifting device, and the upper rotating body and the lower rotating body. , a pulling chain to which the plurality of lifting pawls are attached,
The combine harvester according to claim 3, wherein the inclined guide portion overlaps with the pulling path above the rotation axis of the upper rotating body when viewed from the front. The weeding guide is provided with a vertical guide portion extending upward from a height lower than the tip of the planted grain culm when viewed from the front at a position in the left-right direction of the machine corresponding to the weeding tool,
The combine harvester according to claim 2, wherein a lower end of the inclined guide part is connected to an upper end of the vertical guide part. The reaping section is provided with a cover that covers the support frame from the front,
A portion of the cover located above the pulling path through which the planted grain culm passes is recessed upward in a front view to form a recessed portion,
2. The combine harvester according to claim 1, wherein an upper end of the weeding guide is passed through the recess and connected to the support frame. A driving section is provided behind the reaping section,
The weeding guide is provided with a vertical guide portion extending upward from a height lower than the tip of the planted grain culm when viewed from the front at a position in the left-right direction of the machine corresponding to the weeding tool,
The combine harvester according to any one of claims 1 to 6, wherein the vertical guide portion extends upward from the weeding tool. A through hole passing through the weeding tool vertically is formed in the weeding tool,
The combine harvester according to claim 7, wherein a lower end portion of the vertical guide portion is inserted into the through hole. A grass cutting frame that supports the grass cutting tool is provided at a lower part of the cutting section,
The weeding tool is supported by the weeding frame so as to be able to swing left and right around a vertical swinging axis;
The combine harvester according to claim 8, wherein the through hole vertically passes through the weeding tool along the swing axis. The weeding guide is made of round pipe material,
10. The combine harvester according to claim 9, wherein a lower end portion of the vertical guide portion is formed in a shape obtained by crushing the round pipe material and is inserted into the through hole. The combine harvester according to any one of claims 1 to 6, wherein the weed cutting guide is arranged on the rear side of the front end of the weed cutting tool.

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