JP5114883B2 - Combine - Google Patents

Description

  The present invention relates to a combine.

At the front part of the machine body of the combine, there is provided a cutting and conveying device comprising a pulling device that causes corn straw, a cutting blade that cuts the root of the corn straw, and a conveying device that sends the harvested corn straw to the rear feed chain. In addition, this transport device has a right transport device that sends cereals harvested on the right side to the left rear feed chain side, a central transport device that joins the cereal crops harvested on the right and left center to the right transport device, and a cereal harvested on the left side. And a left-side transport device that joins the right-side transport device. The cereal mash that has joined the right transport device is taken over by the feed chain and threshed by the threshing device. (For example, see Patent Documents 1 and 2.)
JP 2005-40144 A JP 2004-261185 A

  In the above-described prior art, the right side conveying device of the conveying device that sends the harvested cereal to the rear feed chain is integrally provided across the body diagonally rearward. For this reason, there has been a problem that the right side transport device becomes large and heavy, and it is difficult to assemble the right side transport device in the combine assembling work.

  Therefore, an object of the present invention is to make a combine that is easy to assemble and easy to perform maintenance and inspection by devising the configuration of the right-side transport device.

The present invention takes the following technical means in order to solve the above-described problems.
That is, in invention of Claim 1, a cutting part (5) is provided ahead of the body frame (59) provided with the threshing apparatus (24), and the stock-source-side transport apparatus (20) provided in the cutting part (5) in) the takeover of the left rear (a) and right strain base side transfer apparatus extends to (20a), cutting said culms takeover section (a) left strain base-side transfer device for combining the a (20b) The harvested grain is provided between the left stocker-side transport device (20b) and the right stocker-side transport device (20a) at a position before reaching the takeover point (A) in the right stocker-side transport device (20a). and an intermediate stock source-side transfer device for combining the culm (20c), wherein the right strain base-side transfer device right tip side conveyance device provided above the (20a) (2), the takeover section (a) From the front conveying section (2a) and the takeover section (A) arranged obliquely toward the feed chain (21) of the threshing device (24) Only includes conveying portion (2b) after providing said provided with a left-tip-side transfer device (3) is above the left stock source side transfer device (20b), said upper intermediate strain base-side transfer device (20c) In the combine provided with the intermediate tip side transport device (4), the turn end side rotation center of the first transport lug (Ra) provided in the front transport portion (2a) and the left tip transport device (3) are provided. The center of rotation of the second transport lug (Rd) on the transport end side is arranged side by side, and the center of transport of the third transport lug (Rb) included in the rear transport section (2b) is the rotation center of the transport start end on the first transport lug ( Ra) the transport end side rotation center of the second transport lug (Rd) and the transport end side rotation center of the second transport lug (Rd) at a position behind the transport end side rotation center and the second transport lug (Ra). a structure disposed between the transfer terminal end side rotational center of the transport lugs (Rd), the right strain base side A drive shaft (44) provided with a first sprocket (33) for driving a feeding device (20a) is connected to a second sprocket (32) for driving the front transport unit (2a) and the front transport unit (2a). A second drive shaft (45) provided with a detachable coupling (74) and interlocked with the drive shaft (44) and the front drive shaft (39) in the vertical support cylinder (7) includes the intermediate tip side A shaft provided with a third sprocket (48) for driving the conveying device (4) is linked via the intermediate stocker-side conveying device (20c), and a lower transmission cylinder (linked to the front driving shaft (39)) 8) A third drive shaft (56) for driving the pulling device (16) housed in the upper transmission cylinder (11) is interlocked with the lower transmission shaft (43) in the interior, and is interlocked with the third drive shaft (56). Of the drive shafts in the four downward transmission cylinders (25), the second fourth drive from the left end (57) is linked with the fourth sprocket (72) for driving the second intermediate tip side transport device (Vb) provided on the upper side of the intermediate tip side transport device (4), and the second fifth drive from the right end. The shaft (70) is combined with a fifth sprocket (73) that drives the second right tip side transport device (Va) provided on the upper side of the front transport unit (2a) . .

Moreover, in invention of Claim 2, in the upper and lower site | parts by the side of the takeover part (A) in the back conveyance part case (2bc) with which the said back conveyance part (2b) was equipped, from this takeover part (A) to a back conveyance part The combine according to claim 1, wherein each of the protrusions (75) for guiding the harvested cereal meal to (2 b) is formed.

  According to the first aspect of the invention, the tip side transport device (2) provided above the right stocker side transport device (20a) is divided into a two-part configuration of a front transport unit (2a) and a rear transport unit (2b). By doing so, each conveyance part (2a, 2b) becomes small and light, and while being able to reduce manufacturing cost, it is easy to handle and is easy to assemble and disassemble, and maintenance inspection can be performed easily. Moreover, the conveyance termination side rotation center of the 1st conveyance lug (Ra) with which a front conveyance part (2a) is equipped, and the conveyance termination side rotation center of the 2nd conveyance lug (Rd) with which a left tip conveyance device (3) is equipped. The rotation start side rotation center of the third transfer lug (Rb) arranged in the left and right and provided in the rear transfer unit (2b) is the rotation end side rotation center of the first transfer lug (Ra) and the second transfer lug (Rd). The rear end of the first transfer lug (Ra) is positioned between the end of rotation of the first transfer lug (Ra) and the end of rotation of the second transfer lug (Rd). As a result, the harvested cereal rice cake is successfully transferred.

In addition, the production cost can be increased by providing the second sprocket (32) for driving the front conveying portion (2a) on the drive shaft (44) for driving the first sprocket (33) of the right stocker-side conveying device (20a). Can be further reduced, and can be driven synchronously without providing a mechanism for adjusting the speed of the front conveyance unit (2a) and the right stocker side conveyance device (20a). Although the work can be performed smoothly, the front transport section (2a) can be removed by the coupling (74).

Further, according to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the upper and lower parts on the takeover part (A) side in the rear transport part case (2bc) provided in the rear transport part (2b) respectively forming the protrusion by (75), it is possible to guide the culms reaper takeover section from (a) to the rear conveyor section (2b).

Next, embodiments of the present invention will be described with reference to the drawings.
59 is an aircraft frame, 60 is a traveling device provided at a position below the aircraft frame 59, 24 is a threshing device provided at an upper position of the aircraft frame 59, and 6 is a control console provided at a right front position of the threshing device 24. Reference numeral 5 denotes a cutting portion provided at a front position of the body frame 59.

  The reaping part 5 is attached to the tip of a vertical support cylinder 7 that is pivotally attached to the body frame 59 side, and the reaping part 5 is vertically moved by expansion and contraction of a cutting upper and lower cylinder (not shown) that rotates the vertical support cylinder 7 up and down. It is configured to move freely. A lower transmission cylinder 8 in the left-right direction is fixed to the lower portion of the vertical support cylinder 7, and a side transmission cylinder 9 that rises upward on the left side of the lower transmission cylinder 8 stands upward on the right side of the lower transmission cylinder 8. Side frames 10 that do not have a transmission mechanism are provided, and the side transmission cylinder 9 and the upper part of the side frame 10 are connected by an upper transmission cylinder 11 in the left-right direction. The bases of the mounting rods 12, 12 in the front-rear direction are fixed to the left and right side positions of the lower transmission cylinder 8, and the cutting blade frame 13 in the left-right direction is fixed to the tips of the mounting rods 12, 12. A base portion of a plurality of front and rear weed ridges 14 is fixed to the left and right sides 13 at a predetermined interval.

A weeding body 15 is fixed to the tip of each weed pod 14, and a pulling device 16 for raising the weed cereals is provided at the back of each weeding body 15. A scraping device 17 and a stocker-stucking starfoil 18 are provided, respectively, and a cutting blade 19 for cutting the root portion of the cereal is provided in the lateral direction under the stocker-stucking starfoil 18. The Above the cutting blade 19 is provided a strain root side feeder 20 and the tip-side conveyance equipment for conveying the cut culms to the left rear of the takeover point A.

  As shown in FIG. 5, the stock-source-side transport device 20 includes an intermediate stock-source-side transport device 20c between the left stock-source-side transport device 20b and the right stock-source-side transport device 20a. 20a is extended to the left rear takeover point A with a gentle lateral inclination, and the harvested cereals from the intermediate stocker-side transfer device 20c are inherited and joined at the intermediate position before reaching the takeover point A for transport. Further, the harvested cereal meal from the left stocker-side transport device 20b on the left side and the takeover point A are merged. In addition, although the stock source side conveying apparatus 20 pinches and conveys a grain candy with a chain and a pincer, the pinch is not shown in figure.

Tip-side conveying equipment is substantially are provided in parallel in the conveying direction on the upper side of the left stock source side transfer device 20b and the right strain base side transfer device 20a and the intermediate strain base-side transfer device 20c. The right tip side transport device 2 provided above the right stocker side transport device 20a includes a front transport unit 2a that is gently inclined linearly toward the takeover point A, and a rear transport unit in the direction along the feed chain 21 from the takeover point A. 2b, a left tip side transport device 3 is provided above the left stock source side transport device 20b, and an intermediate tip side transport device 4 is provided above the intermediate stock source side transport device 20c.

The conveyance direction of the front conveyance part 2a of the right ear tip side conveyance device 2 and the right stocker side conveyance device 20a is parallel in a side view so that the cereal can be stably fed laterally. In addition, you may make it extend the grain straw during conveyance by inclining the front conveyance part 2a of the right ear tip side conveying apparatus 2 and the right stocker side conveying apparatus 20a a little in a plan view and a side view to a non-parallel posture.

Each tip side conveying equipment is transported lug Ra Cheng, Rc, Rd (first conveying lug Ra, transport lugs Rc, second conveying lug Rd) but so as to project in the action side, each carrier lug Ra , Rc, Rd, the front end of the moving trajectory is arranged in a horizontal line above the cutting blade 19 on the front side of the machine body, and acts to scrape the cereals simultaneously.

A supply chain 22 is provided below the rear conveyance unit 2b of the right ear tip side conveyance device 2, and an adjustment chain 23 is provided below the supply chain 22 so as to sandwich and send the cereal stock from the takeover point A. Yes. This adjustment chain 23 adjusts the supply depth of the tip side of the cereals to the handling room of the threshing device 24 by adjusting the stock holding position of the cereals passed to the supply chain 22. The end side can be moved up and down at the center.

Adjusting chain 23 and the transport unit 2b in the supply chain 22 and at most up after right tip side conveying device 2 in parallel is stretched toward the obliquely upward in side view, and supplying the rear conveyor unit 2b also in a plan view The direction of conveyance toward the diagonally rear of the chain 22 and the adjustment chain 23 at the time of maximum raising is parallel. (See Figure 5)
FIG. 7 shows the front end takeover portion of the feed chain 21 in a side view, but the end conveyance locus 22c of the supply chain 22, the front conveyance locus 69c of the twin sync chain 69, and the front conveyance locus 21c of the feed chain 21 are made parallel. Thus, the cereal transfer from the supply chain 22 to the feed chain 21 via the twin sync chain 69 is performed smoothly.

The right-hand tip side transport device 2 is configured as a separate component for driving the front transport unit 2a and the rear transport unit 2b with separate chains, and the locus drawn by the lug Ra of the front transport unit 2a and the lug of the rear transport unit 2b (third Conveying lugs) The trajectory drawn by Rb approaches the takeover point A and moves at the same height so as to smoothly carry over the cereals. However, the rear conveying is performed with respect to the lugs Ra of the front conveying unit 2a. The lug Rb of the portion 2b may move slightly below or above. In addition, the lug Rb of the rear transport unit 2b moves close to the front transport unit case 2ac of the front transport unit 2a in a plan view, so that the grain transition from the front transport unit 2a to the rear transport unit 2b is performed well.

As shown in FIG. 8, the rear transport unit 2b is configured by winding a chain 80 with a drive sprocket 77 and a roller 76 attached thereto and attaching a lug Rb around a plate-shaped rear transport unit case 2bc arranged vertically. The chain 80 is stretched by a tension sprocket 78 that is urged to rotate by a compression spring SP. By using the fixed roller 76 on the takeover side, the entanglement of the cereal is reduced and the moving position of the lug Rb becomes constant. Moreover, the protrusion part 75 is formed in the take over side of the rear conveyance part case 2bc, and the grain candy is guided. Reference numeral 79 denotes a lug guide. Incidentally, V a is uppermost in the upper right tip side transfer device provided above the transport unit 2a, V b is the uppermost provided on the upper side of the intermediate tip-side transfer device 4 the upper, middle fore-side transfer device (second intermediate tip-side transfer device), V c is the left fore-side conveying device on the top which is provided on the upper side of the left fore-side transfer device 3.

  FIG. 10 shows a structure in which the rear transport unit case 2bc of the rear transport unit 2b is partially wrapped on the front transport unit case 2ac of the front transport unit 2a. become. With this structure, the take-up side rotation center of the front transport unit 2a and the take-up side rotation center of the rear transport unit 2b are made the same in plan view, so that the movement of the lugs Ra and Rb is synchronized to take over the cereal. Disturbance does not occur.

  At the takeover point A, the left ear tip side transport device 3 also approaches and joins the left harvested cereal culm, but the takeover side rotation center of the left ear tip side transport device 3 and the takeover side rotation of the front transport unit 2a Grain takeover is carried out satisfactorily by adopting a positional relationship such that the moving centers are arranged side by side in the front-rear direction and the take-up side rotation center of the rear transport unit 2b is sandwiched in the horizontal direction. With this positional relationship, the takeover side turning center of the rear transport unit 2b is located behind the takeover side turning center of the front transport unit 2a and the takeover side turning center of the left tip side transport device 3.

An upper part of a downward transmission cylinder 25 is attached to the upper transmission cylinder 11, an upper part of each pulling device 16 is attached to the downward transmission cylinder 25, and a lower part of the pulling device 16 is attached to the weed cage 14.
A base portion of the side lateral transmission cylinder 26 protruding inward is attached to the lower side position of the side transmission cylinder 9 located on the left side of the cutting part 5, and a vertical mounting in the vertical direction is attached to the front side of the side lateral transmission cylinder 26. A cylinder 27 is attached, a case of the left tip side transfer device 3 is attached to the upper portion of the attachment cylinder 27, and a drive sprocket 81 of the left stocker side transfer device 20b is provided below the case.

  A driven shaft 29 is pivotally supported at the tip of the support frame 28 attached to the side transmission cylinder 9, and a lug-type scraping device 17 is mounted on the upper side of the driven shaft 29. A star wheel 18 for original scraping is attached, and a driven sprocket SP of the intermediate stock former side transfer device 20 b is attached to an intermediate portion of the driven shaft 29.

Of the lug tip scooping device 17 and the stock-curled starfoil 18 arranged in the lateral direction, the central one is attached so as to be transmitted from the downward transmission cylinder 25 side.
A central transmission cylinder 30 is erected at an intermediate portion of the vertical support cylinder 7, and a second drive shaft 44 to be described later is provided in the central transmission cylinder 30.

Although a control table 6 on which an operator boardes is provided on the right rear side of the cutting unit 5, as shown in FIG. 5, the position of the corner 6 is approached to the right tip side transport device 2 and brought close to the center of the machine body. 62 is cut out along the inclination direction of the right tip side conveying device 2. A seat 66 on which an operator sits is provided at the rear part of the control table 6, a display panel 61 indicating the operation state of the combine is provided at the front side thereof, and a speed change lever 63 and a threshing device of the HST 35 for shifting the traveling device 60 at the center side. An operation panel 64 provided with a threshing lever 65 for intermittently driving 24 and a harvesting lever 67 for intermittently driving the mowing unit 5 is disposed, and nothing is provided in the corner 62, and the control table 6 is close to the front of the aircraft. I try to be in the center. By such a position of the control table 6, the operator can visually confirm the cutting position of the cereal, and the maneuvering is facilitated without any uncut portion. The periphery of the control table 6 is covered with a cabin 68 so that the operator can comfortably control it. PL is a steering lever.

Next, the power transmission state from the engine 34 will be described with reference to the power transmission diagram of FIG.
Belt is transmitted from the engine 34 to a hydrostatic continuously variable transmission (HST) 35 by belt transmission, driving the transmission 36 of the traveling device 60 from the HST 35 and belting to a first drive shaft 37 which is an input shaft on the cutting unit 5 side. It is transmitted via a cutting clutch having 38. The first drive shaft 37 drives a front drive shaft 39 built in the vertical support cylinder 7 by a bevel gear set, and drives a supply drive shaft 40 by another bevel gear set. The supply drive shaft 40 is equipped with a sprocket 41 that drives the rear conveyance unit 2 b of the right tip side conveyance device 2 and a drive sprocket 42 of the stock takeover conveyance device 22.

The front drive shaft 39 transmits power to the lower transmission shaft 43 housed in the lower transmission cylinder 8 by a bevel gear set, and a second drive shaft 44 and a third drive shaft ( transmission by the bevel gear set in the middle of the shaft ( Second drive shaft) 45 is provided.

Although the sectional view is shown in FIG. 6, the second drive shaft 44 is mounted in the central transmission cylinder 30 and is equipped with a sprocket (second sprocket) 32 that drives the front conveying portion 2 a of the right tip side conveying device 2. A sprocket (first sprocket) 33 that drives the right stocker-side transport device 20 a is mounted, and the front transport unit 2 a can be removed by a coupling 74. The second drive shaft 44 is transmitted to a sprocket 46 that drives the adjustment chain 23 with another bevel gear set. A rug type scraping device 17 and a stock source raking star wheel 18 are mounted on the upper and lower sides of the right stocker side transport device 20a. By mounting the sprocket 32 that drives the right tip side transport device 2 and the sprocket 33 that drives the right stocker side transport device 20a on the second drive shaft 44, the configuration for synchronizing the transport speed is simplified.

The third drive shaft 45, via a universal joint and Cheng transmission 47 (intermediate strain base-side transfer device 20c), a separate lug-type scraping device 17 and the strain based on scraping star wheel 18 while communicating motion, intermediate A shaft on which a sprocket (third sprocket) 48 for driving the tip side conveying device 4 is attached is interlocked .

The lower transmission shaft 43 drives the left and right upper cutting blades 19 to slide relative to each other in opposite directions at both ends, and transmits power to the fourth drive shaft 49 housed in the side transmission cylinder 9 by a bevel gear set. Power is transmitted from the fourth drive shaft 49 to the speed change input shaft 50 by a bevel gear set, further transmitted to the speed change output shaft 55 via the belt speed change 54, and further, a fifth drive shaft built in the upper power transmission cylinder 11 by gear transmission. (Third drive shaft) Power is transmitted to 56. The fourth drive shaft 49 drives the left stocker-side transport device 20b with a drive shaft (fourth drive shaft) 57 in the side lateral transmission cylinder 26 and a sprocket 81 of the drive shaft 51 in the vertical mounting cylinder 27, and Drives the lag type scoring device 17 and the stock-sourced stirrer star wheel 18 to drive the drive sprocket 53 of the left ear tip side transport device 3 and the upper left tip side transport device V c provided further above the left tip side transport device 3. A sprocket 52 is attached to the drive shaft 51.

The fifth drive shaft 56 transmits power to the drive shaft 58 in the downward transmission cylinder 25 and the drive shafts 57, 70, 71 in another downward transmission cylinder by the bevel gear set to drive the pulling chain of the pulling device 16. The sprocket (fourth sprocket) 72 for driving a medium tip-side transfer device V b on the central left drive shaft 57 is further bevel gear pair provided further above the intermediate tip-side transporting device 4 in provided, the center right of the drive shaft (second (5 drive shaft) 70 is further provided with a sprocket (fifth sprocket) 73 for driving the upper right tip side transport device Va provided further above the front transport portion 2a of the right tip side transport device 2 in a bevel gear set.

Next, the harvesting operation using the above combine will be described. When the aircraft is moved forward, the weeds are divided by each weed body 15, and the cereals that have been weeded are raised by the pulling device 16, and when the roots are cut by the cutting blade 19, the lag type scraping device 17 and Kabumoto scraping scraping rare behind the star wheel 18, the left and right lines source side transfer device 20a, a strain base by 20b and the intermediate strain base-side transfer device 20c is clamped, the right tip side conveying apparatus 2 The tip side is transported by the left tip side transport device 3 and the intermediate tip side transport device 4 and is transported to one takeover point A through the transport path and the stock chain holding position to the supply chain 22 is adjusted by the adjustment chain 23. Then, it is taken over to the supply chain 22 and further passed to the feed chain 21 on the side of the threshing chamber via the twin synchro chain 69 and supplied to the threshing chamber by the feed chain 21 for threshing.

Combine side view Overall plan view of combine Combine harvester side view Cutaway side view of the combine Top view of combine harvester Partial enlarged side sectional view Partial enlarged side view Partial enlarged side view Power transmission system diagram Combine harvester plan view showing another embodiment

2 Right tip side transfer device 2a Front transfer portion 2b Rear transfer portion 2bc Rear transfer portion case 3 Left tip transfer device
4 Intermediate tip side transport device 5 Cutting section
7 vertical support cylinder
8 Lower transmission cylinder
11 Upper transmission cylinder
16 Pulling device 20 Stock source side transport device 20a Right stock source side transport device 20b Left stock source side transport device
20c intermediate stock former transport device 21 feed chain 24 threshing device
25 Downward transmission cylinder 32 Sprocket (second sprocket)
33 Sprocket (first sprocket)
39 front drive shaft
43 Lower transmission shaft 44 Drive shaft
45 Third drive shaft (second drive shaft)
48 sprocket (third sprocket)
56 fifth drive shaft (third drive shaft)
57 drive shaft (4th drive shaft)
59 Airframe frame
70 drive shaft (5th drive shaft)
72 sprocket (4th sprocket)
73 sprocket (5th sprocket)
74 Coupling 75 Protruding part A Takeover part
Ra transport lug (first transport lug)
Rb transport lug (third transport lug)
Rd transport lug (second transport lug)
Va second right tip side transfer device
Vb upper middle tip side transport device (second intermediate tip side transport device)

Claims (2)

A cutting part (5) is provided in front of the machine body frame (59) provided with the threshing device (24), and the stocker-side transport device (20) provided in the cutting part (5) has a left rear takeover part ( a) right strain base side transfer apparatus extends to a (20a), reaper the takeover part culms (left strain base-side transfer device for combining the a) (20b), left strain base-side transfer device (20b ) And the right stocker-side transport device (20a), and the intermediate stocker-side transport device that joins the harvested cereals to the position before reaching the takeover point (A) in the right stocker-side transport device (20a) a (20c), wherein the right strain base-side transfer device right tip side conveyance device provided above the (20a) (2), the takeover section conveying section before arranged obliquely toward the (a) ( 2a) and a rear conveying portion (2b) provided from the takeover portion (A) toward the feed chain (21) of the threshing device (24) Wherein comprising a left fore-side transfer device (3) is above the left stock source side transfer device (20b), wherein the upper intermediate strain base-side transfer device (20c) with an intermediate tip-side transfer device (4) In the combine, the conveyance end side rotation center of the first conveyance lug (Ra) provided in the front conveyance unit (2a) and the conveyance end side rotation center of the second conveyance lug (Rd) provided in the left tip conveyance device (3) Are arranged on the left and right, and the rotation start side rotation center of the third transfer lug (Rb) provided in the rear transfer unit (2b) is the rotation end side rotation center of the first transfer lug (Ra) and the second transfer At the position behind the rotation end side rotation center of the lug (Rd), the transfer end side rotation center of the first transfer lug (Ra) and the transfer end side rotation center of the second transfer lug (Rd) first scan which constitutes a disposed between, for driving the right strain base-side transfer device (20a) A drive shaft (44) provided with a rocket (33) is provided with a second sprocket (32) for driving the front transport unit (2a) and a coupling (74) for detaching the front transport unit (2a). And a second drive shaft (45) interlocked with the front drive shaft (39) in the vertical support cylinder (7) together with the drive shaft (44), to drive the intermediate tip side transfer device (4). The lower transmission shaft (43) in the lower transmission cylinder (8) linked to the front drive shaft (39) is interlocked with the shaft provided with the sprocket (48) via the intermediate stocker-side transfer device (20c). And a third drive shaft (56) for driving the pulling device (16), which is built in the upper transmission cylinder (11), are interlocked with each other in the four downward transmission cylinders (25) interlocked with the third drive shaft (56). Among the drive shafts, the intermediate tip side transport device is connected to the fourth drive shaft (57) second from the left end. (4) interlocking with the fourth sprocket (72) for driving the second intermediate tip side transport device (Vb) provided on the upper side, the second transport shaft (70) from the right end is connected to the front transport unit The combine characterized by interlocking the 5th sprocket (73) which drives the 2nd right-hand tip side conveying apparatus (Va) with which the upper side of (2a) was equipped . Guide the harvested cereals from the takeover part (A) to the rear transfer part (2b) in the upper and lower parts on the takeover part (A) side in the rear transfer part case (2bc) provided in the rear transfer part (2b) Combine of claim 1, wherein the protruding portion (75) and respectively formed.

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