JPH0337383Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a grain culm lifting device in a reaping device such as a combine harvester.

<Prior art> Conventionally, for example, a small combine harvester for two-row cutting is equipped with a grain culm pulling device that can reap more multi-row plants such as three-row cutting.
It is known that two lifting devices on both the left and right sides are tilted in a V-shape when viewed from the front, and an intermediate lifting device shorter than these lifting devices is provided approximately vertically between them.

These types of reapers make the lower end of the hoisting device as wide as possible in order to widen the cutting range at the front of the machine, while the presence of a driver's cab on the side of the cut field and the raking of the grain culm after hoisting and reaping. Since the raking start position for transferring to the next conveyance section is located at the center of the machine or closer to the uncut field side, the left and right positions are set so that the grain culms after being raised are collected as much as possible in the raking device near the center of the machine. The upper end of the lifting device is located close to the center of the fuselage.

<Problems to be solved by the invention> However, in the mechanism in which a short lifting device is interposed between long lifting devices as described above, the upper ends of the lifting devices are not aligned, so the upper ends are It is not possible to have a simple configuration in which all drive input is obtained from a horizontal transmission shaft such that the It is necessary to install a transmission shaft bent at least once in the center, which not only obstructs other processing operations and installation of processing mechanisms, but also causes the transmission shaft to push down the base of the planted grain culm, making it difficult to reap. This poses a problem in that it disturbs the state, requires special design considerations, and is expensive in terms of cost.

In addition, in this case, in order to ensure the passage of the grain culm during lifting, the central lifting device cannot be provided with a mechanism to stabilize the fixation of the lifting device at the top of the device, and its installation rigidity is weak. There are drawbacks.

<Means for solving the problem> The device of the present invention to solve the above-mentioned problems is to provide a short intermediate lifting device between the left and right lifting devices, and Between each pulling device, a lifting passage is formed on the mowed land side and the uncut land side so that one bends or curves at the upper part and merges with the other, and the drive transmission mechanism of the above-mentioned medium pulling device is connected. An intersection is formed on the bent or curved lifting passage and is provided so as to intersect, and the lifting claw of the lifting device with the lifting passage as the active side travels to the intersection while maintaining an upright state. The present invention is characterized in that the above-mentioned lifting device is provided with a standing guide.

<Operation> In the device of the present invention configured as described above,
The middle lifting device located in the middle of the three pulling devices installed in parallel is driven by input transmission from the top.
The grain culm is pulled up through the pulling passages formed on both sides, but the upper end of the grain culm is In order to prevent the tips, etc. from falling forward or to the side when they are caught in the transmission mechanism,
In the passage, a raising pawl that operates in the passage runs in an upright state up to a point where it intersects with the transmission mechanism.

<Example> To explain in detail the example shown below, a pre-processing section 3 is provided in the front of the combine harvester body 1,
A driver's cab 5 is installed on the rear side of the pre-processing section 3 on the mowed land side. In addition, a threshing unit 7 is located on the uncut land side behind the driver's cab 5, and a paddy receiving tank 9 is located on the already cut land side.
etc. are installed, and a running section consisting of crawlers 11 and the like is configured at the bottom of the body 1.

The pre-processing section 3 has a rear end rotatably supported so as to be able to move up and down, a transmission shaft 15 that connects and supports the pre-processing transmission case 13 in a T-shape at the front end, and a plurality of transmission shafts 15 that protrude forward of the pre-processing transmission case 13. books (in this example 4
supported by the pre-processing frame 17 of the book);
It is composed of a reaping section 19 provided on the front side, and a conveying device 21 between the reaping machine 19 and the machine body 1.

The reaping machine 19 includes three left and right lifting devices 23 and 24 tilted vertically in front of the pre-processing section 3, an intermediate lifting device 25 located between them, and a rear part of the lower part of the pulling devices. It consists of a raking device 27 and a cutting blade 29 installed below the front end of the raking device 27. 31 is a feed chain that introduces the grain culm from the conveying device 21 to the threshing section 7.

At the tip of each pre-processing frame 17, dividers 33, 33 on both sides and middle dividers 35, 35 disposed between them are fixedly installed, and between each divider, the lifting device 23 is provided. The lower end of 25 is fixed to the preprocessing frame 17.

The upper rear surfaces of the left and right outer lifting devices 23 and 24 are connected to the upper ends of cased drive shafts 37 and 39 rising from the aforementioned pretreatment transmission case 13, and further connected to the upper ends of the intermediate lifting devices. The front side and the front side of the upper end of the mown field side pulling device 23 in front of the driver's cab 5 are connected by a drive shaft 41 with a case. As a result, all of the pulling devices 23 to 25 are configured to receive transmission power from the upper part of the reaper 19.

Among the above-mentioned lifting devices 23 to 25, the pulling device 24 on the uncut land side opposite to the driver's cab 5 is provided substantially vertically as a whole when viewed from the front, and its inner side is the side on which the lifting claw 43 acts. is doing. On the other hand, the middle pulling device located in the middle has a lower height (shorter dimensions) than the both side lifting devices 23 and 24, and lifts the surface facing the uncut land side pulling device 24 to raise the claw 43. A protruding working side is formed between the two, and a substantially vertical uncut land side lifting path A for lifting two rows of grain culms is formed between the two.

On the other hand, the pulling device 2 on the driver's cab 5 side (already mowed land side)
3, the inner side is the working side of the lifting claw 43, and on the working side of the middle lifting device 25 (lifting passage A),
Up to the height where the raising of the grain culm almost ends,
A single-row pulling path _B1 on the mowed land side is provided, which faces the non-operating side of the intermediate pulling device 25 in parallel and is substantially perpendicular when viewed from the front.

The parallel opposing surfaces between the two pulling devices 23 and 25 that are continuous with the upper part of the pulling path B ₁ of the above-mentioned pulling path B ₁ connect the pulling path B ₂ bent in a dogleg shape toward the uncut land side. None, it merges with the upper part of the uncut land side pulling passage A. Corresponding to this shape, the pulling device 23 on the mown field side is bent in a dogleg shape at the upper part as well as the pulling path B, and the pulling device 23
The entire structure has a similarly curved shape.

In addition, the pulling devices 23 and 24 on both sides are located at approximately the same position (or on the same straight line) in the left and right direction when viewed from the aircraft 1.
However, as shown in FIG. This mechanism ensures that the lifting device 25 is guided to the rear side of the lifting device 25 without being guided forward.

In the lifting device, the lifting devices 2 on both sides
3, 24 are provided with input shafts 45, 47 connected to the drive shafts 37, 39 described above, and in the case of the pulling device 24 on the uncut land side, the input shaft 47 in the case 24a and the lower end are provided. A chain 51 is stretched between a chain wheel pivotally supported by a driven shaft 49, and a lifting pawl 43 is attached. 52 is a guide for raising the raising claw 43. On the other hand, an endless relay shaft is connected between the input shaft 45 and the two relay shafts 53 and 55 provided on the bent and inclined upper part of the case 23a of the mowed field side pulling device 23. A chain 56 is wrapped around it. As a result, a chain 61 is wound between one of the relay shafts 53, a driven shaft 57 at the lower end of the pulling device 23, and an idler shaft 59 outside the intermediate portion thereof via a chain wheel, thereby driving the pulling device 23. The system is the relay shaft 5 mentioned above.
It is driven by 3. On the side of the mown field side lifting paths B ₁ and B ₂ , a standing guide 63 and a chain guide 63a bent in an L shape on the outer circumferential side of the chain 61 and a chain guide 63a are provided to bend the drive system along the paths. is disposed, whereby the lifting claw 43
is raised and made to run upright along the paths B ₁ and B ₂ .

On the other hand, the inner lifting device 25 has an input shaft 65 and a driven shaft 67 supported at the upper and lower ends of the case 25a, and an endless chain 69 is wound around a chain wheel that is supported by these. A raising guide 71 for causing the raising pawl 43 to move upright is provided along the straight portion of the chain 69 on the side facing the chain 69 . The other relay shaft 55 in the lifting device 23 and the input shaft 65 are connected by a drive shaft 41 vertically installed on the front side of each case 23a, 25a.

In the above mechanism, the drive shaft 41 is a lifting passage.
It has an intersection 73 that intersects with the lifting path B ₂ in a front view near the confluence point with the lifting path A at the end of B ₂ . For this reason, the pulling pawls 43 running in the mown field side pulling paths B ₁ and B ₂ are driven when the upper end (ear tip or panicle) of the grain culm passing through this crosses with the drive shaft 41. The upper end of the erecting guide 63 is placed at the upper end along the lifting path B ₂ so as to keep the erected state at least until passing the intersection 73 so as to prevent the shaft 41 from falling in the opposite direction of travel. It has been extended nearby.
The above-mentioned mowed field side pulling device 23 and the pulling path B ₁ ,
B ₂ In addition to being bent into a dogleg shape, it is also possible to curve it into a round shape.

In addition to a chain wheel, a guide roller for raising the lifting pawl 43 is pivotally supported on the driven shafts 49, 57, 67 at the lower end of each of the lifting devices 23-25.

At the rear of the lower part of the lifting devices 23 to 25, there are appropriately provided guides 75 and the like for guiding grain culms introduced as the machine body 1 advances through the lifting passages A and _B 1 to the raking device 27. The raking device 27 includes a raking shaft 79 that stands up tilted forward from the pretreatment transmission case 13, and two star wheels 81 that are engaged with each other by the raking shaft 79 and rotate to rak the base of the grain culm. , 83 and each star wheel 81, 83
It consists of raking belts 85 and 87 which are located above and are driven simultaneously and are wound around in a V-shape to scrape the slightly upper part of the grain culm from the side.

Next, the structure for preventing straw waste from being wrapped around the star wheel will be explained with respect to one star wheel 81. As shown in FIGS. 6 and 7, the star wheel 81 is attached to the raking shaft 79 via the bracket 70. , star wheel 81, pulley 7
2 and drive the scraping belt 85. Further, on the star wheel 81, a plurality of holes 74 are bored on concentric circles having a common axis, and a pin 76 is formed in each hole.
Insert it so that it can be raised and lowered freely.

An unevenness 80 is formed at the contact position of the pin 76 on the star wheel cover 78, and as the star wheel 81 rotates, the pin 76 lowers on the active side and is accommodated in the upper cover 82, and rises on the non-active side. The straw waste 84 on the cover 82 is protruded onto the upper cover 82 and is conveyed in the rotational direction, dropped onto the star wheel 81, and then scraped by a scraper 86 made of a spring material or the like fixed to the cover 78. It constitutes a mechanism for dropping it from above the star wheel 81.

The grain culm conveying device 21 is located at the rear upper part of the raking device 27, and is connected to the lower (stock base) conveying section 8 at a certain interval.
8 and an upper (tip) conveying section 89, and furthermore, a conveying device 21 is located at the front end of the upper portion between the two.
An auxiliary feed device 90 is provided for transversely feeding the upper part of the grain culm from the operator's cab side (already cut field side) to the conveyance start end.

In the auxiliary device 90, the frame 2 of the conveying device
Chain wheels 92 and 93 are pivotally supported by an auxiliary frame 91 provided at 1a.
An endless chain 94 is wound between 2 and 93, and a large number of feed pawls 95 are attached to the chain 94. One chain wheel 93 is pivotally supported by a shaft 97 that is interlocked with the drive of the conveyance device 21 . The feed pawl 95 stands up during the movement process in the left and right direction from the end on the driver's cab 5 side of the feed device 90 to the front side of the opposite end, and feeds the grain culms sent from the front to the respective conveying sections 88 and 89. It is transferred horizontally to the starting section and transferred to the grid. Furthermore, since the auxiliary feeding device 90 is located between the upper and lower conveyance sections 88 and 89, it has the effect of transferring grain culms to both conveyance sections. 96
is an adjustment adjuster for the chain 94.

In addition, a lug is installed at the height of the panicle passage on the back side of the middle pulling device 25 so that the panicle that has pulled up the pulling passage _B1 and passed through it can be smoothly transferred to the passage A side through the passage _B2 . A cob feeding device 100 is provided, and on the rear side of the both-side pulling devices 23 and 24, the middle part or above containing the cob of the grain culm guided from the lifting passages B ₁ , B ₂ and A is provided. The grain culm guides 98 and 99 are oriented rearward so that the grain culm guides 98 and 99 are smoothly guided between the cab-side end of the auxiliary feeding device 90 and the starting end of the conveying device 21 without falling to either the left or right side. It is attached.

FIG. 8 shows an embodiment in which the middle lifting device 25 is provided at a rear position from the left and right lifting devices 23 and 24, and in this case, the raised grain culm does not fall in front of the middle pulling device 25. The structure is designed to prevent

In this example, the lifting path B ₁ of the intermediate lifting device 25,
A groove-shaped guide portion 26 is formed at the front end on the B ₂ side, and is open to the mown field side pulling device 23 side, so that the pulling claw 43 of the pulling device 23 can be connected to the pulling path B ₁ ,
The tips of the lifting pawls 43 that run upright at _B2 are sequentially accommodated in the groove-shaped guide portion 26, and are guided in that state until the end point of the lifting path _B2 . With this structure, once the grain culm pulled up in the passage B ₁ is pulled up by the lifting pawl 43 in the lifting passage B ₁ and its lower part, the intermediate lifting device 25 located behind the lifting pawl 43
It is securely latched and raised without falling forward.

<Effects of the invention> According to the device of the present invention configured as described above,
Since the drive transmission mechanism for the middle lifting device located between the three parallel lifting devices is removed from above, the work of installing the transmission device in the complex processing mechanism at the center bottom of the pre-processing section is complicated and transmission is difficult. In addition to eliminating the complexity of the mechanism itself, the transmission mechanism can be provided without affecting the structure or installation of other processing devices that do not interfere with the reaping work.

The middle lifting device also has the advantage that strong mounting rigidity can be obtained by connecting the upper part of the pulling device on the mown field side, which is already firmly fixed to the pretreatment frame etc., via the transmission mechanism. .

In the case of a lifting path that intersects with the transmission mechanism, the lifting device is provided with a lifting guide so that the lifting pawl for the lifting operation maintains an upright state and travels to the intersection with the transmission mechanism. Since the grain culm is extended, it has the effect that the raised grain culm is sent to the next process while maintaining its normal posture without being obstructed by the transmission mechanism or tilting forward.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the configuration of the pulling device of the present invention in a combine, FIG. 2 is a front view of a combine equipped with the pulling device, and FIG. 3 is a side view of the preprocessing section of the combine. FIG. 4 is a plan view of the pre-processing device of the combine, FIG. 5 is a front sectional view showing the structure of the grain culm conveying device and the auxiliary feeding device, and FIGS. 6 and 7 are examples of the structure of the raking device. FIG. 8 is a layout plan view showing another embodiment of the lifting device. 1: Machine body, 19: Reaping machine, 23, 24: Lifting device, 25: Middle lifting device, 41: Drive shaft (transmission mechanism), 43: Lifting claw, 63: Standing guide, 7
3: Intersection, A, B ₁ , B ₂ : Raised passage.

Claims (1)

[Scope of utility model registration request] A short intermediate pulling device is installed between the left and right pulling devices, and a short medium pulling device is installed between each adjacent pulling device so that one side bends or curves at the top and merges with the other. A pulling passage is formed on each side of the uncut land, and a driving transmission mechanism of the intermediate lifting device is provided so as to form an intersection on the bent or curved lifting passage so as to intersect with the pulling passage, A grain culm lifting device for a reaping device, wherein the lifting device is provided with an upright guide so that the lifting claw of the lifting device whose working side is maintained in an upright state up to the intersection point.