JP2019103463A - Combine harvester - Google Patents

Abstract

To provide a combine harvester which a grain sieve is readily attached to and detached from without being obstructed by an inner cover for covering a lateral plate of a threshing device from a lateral outer side of a machine body.SOLUTION: In a combine harvester, an inner cover 117 has a front cover body 118, a middle cover body 119 and a rear cover body 120 that are configured by dividing the inner cover 117 in a machine body longitudinal direction. The middle cover body 119 overlaps on an opening 106a in side view among the front cover body 118, the middle cover body 119, and the rear cover body 120 can be attached to and detached from a lateral plate 106.SELECTED DRAWING: Figure 9

Description

  [0001] The present invention relates to a combine equipped with a threshing device for threshing harvested rice bran.

  For example, a combine described in Patent Document 1 is already known as a combine as described above. Patent Document 1 discloses a combine equipped with a threshing device (in the literature, “threshing section [5]”) for threshing a reaping grain gourd. The threshing device includes a threshing cylinder (in the literature, “throwing cylinder [9]”), and a rocking sorting device (provided in the lower part of the threshing cylinder and sifting and sorting objects to be sorted) And a mechanism [11] "). The rocking and sorting apparatus has a fine sieve for fine sorting (in the literature, "Grensee [24]") which can be detached from the lateral side of the machine body. In the lateral side plate of the threshing apparatus ("left side wall [34]" in the literature), an opening through which the grain sieve can pass ("inspection port 34A" in the literature) is formed. According to such a configuration, by passing the glen sheave through the opening, the glen sheave can be attached and detached from the lateral side of the machine body.

Patent No. 4886650 gazette

  Here, in the above-mentioned combine, an inner cover which usually covers the side plate from the side of the machine side, and an outer cover which covers the inner cover from the side and the side of the machine and which is removable from the inner cover are provided. In the meantime, when passing the glen sheave through the opening, the inner cover becomes an obstacle and the gren sheave can not be easily attached and removed.

  In view of the above-mentioned situation, there is a demand for a combine which can easily remove and install the gren sheave without the inner cover covering the lateral side plate of the threshing apparatus from the lateral and outer sides of the machine being disturbed.

The features of the present invention are:
A combine equipped with a threshing device for threshing harvested rice bran, comprising
The threshing device includes a threshing cylinder, and a rocking and sorting device provided below the threshing cylinder and rocking and sorting objects to be sorted.
The swing sorting apparatus has a fine sieve for fine sorting which is detachable from the lateral side of the machine body,
An opening through which the gren sheave can pass is formed in a side plate of the threshing device,
An inner cover that covers the lateral side plate from the lateral side of the machine;
And an outer cover which covers the inner cover from the lateral and outer sides of the machine and which is detachable from the inner cover,
The inner cover has a plurality of cover bodies configured by dividing the inner cover in the longitudinal direction of the airframe,
Among the plurality of cover bodies, the cover body overlapping with the opening in a side view is detachably attachable to the side plate.

  According to this feature configuration, when the cover body overlapping the opening in the side view among the plurality of cover bodies is removed from the side plate, the inner cover does not get in the way when passing the glen sheave through the opening. As a result, the gren sheave can be easily attached and detached without the inner cover getting in the way. Moreover, since it is only necessary to remove the cover body overlapping the opening in the side view among the plurality of cover bodies without removing the entire inner cover, also from this point, it is possible to realize easy attachment and detachment of the gren sheave.

Furthermore, in the present invention,
A lower cover is provided to cover a portion of the side plate lower than the inner cover from the lateral side of the machine body,
The upper end portion of the lower cover is preferably in contact with the lower end portion of the removable cover body from the lateral side of the machine body.

  According to this feature configuration, the lower end portion of the cover body can be pressed from the lateral outer side of the machine body by the upper end portion of the lower cover so that the lower end portion of the cover body does not extend to the lateral side of the body.

Furthermore, in the present invention,
It is preferable that a lower end portion of the removable cover body is formed with a bent portion which is bent outward in the lateral direction of the machine body and enters the inside of the lower cover.

  According to this feature configuration, the labyrinth structure is formed by the bent portion between the lower end portion of the cover body and the upper end portion of the lower cover. This makes it difficult for wood shavings (for example, cuttings of cutting grain carried by the feed chain), rain water, and the like to penetrate inside from between the lower end portion of the cover body and the upper end portion of the lower cover.

Furthermore, in the present invention,
If a portion of the removable cover body above the portion with which the upper end of the lower cover is in contact is formed an overhanging portion projecting outward in the lateral direction of the machine than the portion with which the upper end of the lower cover is in contact It is suitable.

  According to this feature configuration, chips from above (for example, scraps of cutting grain carried by the feed chain), rain water, etc. will be blocked by the overhanging part, and such chips, rain water, etc. will be covered by the cover body It is difficult to intrude inside from between the lower end of the lower cover and the upper end of the lower cover.

Furthermore, in the present invention,
The threshing apparatus is provided below the rocking and sorting apparatus, and is provided at the bottom of the rocking and sorting apparatus at the rear of the rocking sorting apparatus, and at the back of the rocking sorting apparatus. And a second collecting unit for collecting second grains.
The first collecting section has a first screw for conveying the grain in the lateral direction of the machine,
The second recovery unit has a second screw for conveying the grain in the lateral direction of the machine,
A belt transmission mechanism provided with a transmission belt for power transmission and provided over the rotation shaft of the first screw and the rotation shaft of the second screw is provided on the side of the fuselage on the side where the side plate is located. ,
A tension mechanism for applying tension to the transmission belt;
It is preferable that the tension mechanism be exposed in a side view when the removable cover body is removed.

  According to this feature configuration, adjustment and confirmation of the tension mechanism can be easily performed by removing the cover body.

It is a left view which shows a self removal type combine. It is left side sectional drawing which shows a threshing apparatus. It is a left view which shows the belt power transmission mechanism in the left side of a threshing apparatus. It is a figure which shows the power transmission path of this combine. It is a left view which shows the positional relationship of a transmission belt etc. and opening. It is a disassembled perspective view which shows the attachment structure of a tension mechanism and a lid | cover. It is back sectional drawing which shows the tension mechanism of the state which tensioned the transmission belt. It is a back sectional view showing the tension mechanism in the state where the power transmission belt was loosened. It is a left view which shows the inner cover in the left side of a threshing apparatus. It is a disassembled perspective view which shows an inner cover. It is XI-XI sectional drawing in FIG. It is a back sectional view showing a situation where a grensee is removed. It is an enlarged view which shows the part enclosed by the circle XIII in FIG. It is a perspective view which shows a pulley cover and its attachment structure. It is a left view which shows the inner cover which concerns on another embodiment.

  An embodiment for carrying out the present invention will be described based on the drawings.

[Overall configuration of combine]
FIG. 1 shows a self-eliminating combine. The combine includes an airframe frame 1 and a traveling device 2 for supporting the airframe frame 1. A driving cabin 3 is provided on the right side at the front of the vehicle. The driving cabin 3 includes a driving unit 4 on which a driver rides, and a cabin 5 that covers the driving unit 4. An engine E (see FIG. 4) is provided below the driving unit 4.

  In front of the driving cabin 3, a reaper 6 is provided to reap the cropped rice straw. Behind the driving cabin 3, a grain storage tank 7 for storing grains is provided. A grain discharging device 8 for discharging grains in the grain storage tank 7 is provided. At the left side of the machine body, a feed chain 9 is provided for holding and transporting the reaper. A threshing device 10 is provided on the left side of the grain storage tank 7. The threshing device 10 threshs the reaper by the feed chain 9 with the threshing cylinder 11. On the rear side of the threshing device 10, a sluice transporting device 12 for receiving sluice after threshing treatment from the feed chain 9 and nipping and transporting it backward is continuously provided, and the threshing carried by the sluice transporting device 12 A drainage and cutting device 13 for cutting and removing the drainage from the device 10 is continuously provided.

  The reaper 6 is configured to have a plurality of cutting specifications (for example, a six-row cutting specification). The reaper 6 includes a plurality of (for example, seven) weighing tools 14, a plurality (for example, six) raising devices 15, a cutting device 16, and a conveying device 17. The wedging tool 14 crops the crop of the field. The inducer 15 causes the planted cereals to be divided. The cutting device 16 cuts off the induced cereal grains. The transport device 17 transports the reaper to the threshing device 10 rearward.

  A side cover 18 is provided on the outermost side of the fuselage on the lateral side (left side) of the threshing device 10 on the side where the feed chain 9 is located. The side cover 18 is divided up and down into an upper cover 19 (corresponding to the "outer cover" according to the present invention) and a lower cover 20 (corresponding to the "lower cover" according to the present invention). ing. The upper cover body 19 is divided into the front and rear upper cover bodies 21 and the rear upper cover body 22. The lower cover body 20 is divided into front and rear lower cover bodies 23 and rear side lower cover bodies 24 so as to be configured.

Threshing device
As shown in FIG. 2, in the upper part of the threshing device 10, a handling chamber 25 is formed. The threshing cylinder 11 is provided in the throttling chamber 25 so as to be rotatable around a rotation axis Y1 extending in the longitudinal direction of the vehicle. A net 27 is provided below the threshing cylinder 11. At the rear of the threshing drum 11, a separation drum 28 is provided rotatably around an axis X1 extending in the left-right direction of the machine. The separation drum 28 is a diffusion cylinder, which dissolves the objects to be sorted and promotes the flow of single-grained grains and the like contained therein. At the rear of the separation drum 28, a dust collecting fan 29 for discharging dust to the outside is provided.

  At the lower part of the threshing apparatus 10, a swing sorting apparatus 30 for sorting the sorting objects by swinging, a main tray 31 for blowing the selection wind to the sorting area (fine sorting area) on the lower side in the swing sorting apparatus 30, The first subcarp 32 for blowing the selection wind to the upper sorting area (coarse sorting area) in the sorting device 30, the second subcarp 33 for blowing the sorting air to the rear sorting area in the rocking sorting apparatus 30, The first collection section 34 for collecting grains of grain (eg, single grained grains), and the second collection section 35 for collecting grains of secondaries (eg, grains with branch stems) are provided. .

  The rocking and sorting apparatus 30 is provided below the receiving net 27. The rocking and sorting apparatus 30 includes a sieve case 36, a first grain pan 37 for rough screening, a plurality of first screening lines 38, a second grain pan 39 for rough screening, and a plurality of second screening lines 40. A rough sorting chaff sieve 41, a rough sorting straw rack 42, a guide plate 43, and a fine sorting grain sieve 44 are provided.

  The sieve case 36 is equipped with a first grain pan 37, a first sieve line 38, a second grain pan 39, a second sieve line 40, a chaff sieve 41, a straw rack 42, a guide plate 43, and a grain sieve 44. At the rear of the sheave case 36, an eccentric cam type rocking drive mechanism 45 for driving the sheave case 36 to rock is provided.

  The first grain pan 37 is provided on the front side of the rough sorting area of the sieve case 36. The first glenpan 37 carries out specific gravity sorting while transferring the sorting object leaked from the front side of the receiving net 27 rearward.

  The first sieve line 38 obliquely extends rearward and upward from the rear end portion of the first grain pan 37, and is provided with an interval in the left-right direction of the machine. The first sieve line 38 feeds the front end of the chaff sieve 41 while unwinding the objects to be sorted from the first grain pan 37.

  The second grain pan 39 is provided below the dust feed port 46 on the rear side of the rough sorting area of the sieve case 36. The second grain pan 39 carries out specific gravity sorting while transferring the sorting object from the dust outlet 46 to the rear.

  The second sieve wire 40 extends rearward from the rear end of the second grain pan 39 and is provided with a space in the left-right direction of the machine. The second sieve wire 40 feeds the rear end of the chaff sieve 41 and the straw rack 42 while unwinding the objects to be sorted from the second grain pan 39.

  The chaff sieve 41 is provided behind and below the first grain pan 37 in the rough sorting area of the sieve case 36. The chaff sieve 41 performs sieving while transferring the objects to be sorted from the first sieve line 38, the objects to be sorted leaked from the rear side of the net 27 and the objects to be sorted from the second sieve wire 40 backward.

  The straw rack 42 is connected to the rear end of the chaff sheave 41 on the rear side of the rough sorting area of the sheave case 36. The straw rack 42 sifts the sorting object from the second sieve wire 40 and the sorting object from the chaff sieve 41 while transferring it backward.

  The guide plate 43 is provided on the front side of the fine sorting area of the sheave case 36. The guide plate 43 causes the sorting object leaked from the front side of the chaff sieve 41 to flow downward downward.

  The grain sieve 44 is provided on the rear side of the fine sorting area of the sieve case 36. The grain sieve 44 sifts the sorting object leaking from the rear side of the chaff sieve 41 and the sorting object from the guide plate 43 while transferring it backward. The grain sieve 44 is configured to be removable from the lateral side (left side) of the vehicle body.

  The most recovery unit 34 is provided below the glen sieve 44. The first collecting unit 34 includes the first screw 47 that conveys the first grain to the right. At the right end portion of the first screw 47, a grain feeding device 48 for feeding and conveying the grain of the first grain to the grain storage tank 7 is interlocked and connected.

  The second collection unit 35 is provided at the rear of the collection unit 34 and below the straw rack 42. The second collecting unit 35 includes a second screw 49 that conveys the second grain to the right. At the right end of the second screw 49, a second reduction device 50 for reducing the grain of the second shot to the rocking and sorting device 30 is interlocked and connected.

[Power transmission path]
As shown in FIGS. 3 and 4, a countershaft 51 extending in the left-right direction of the vehicle body is provided at the front lower side of the threshing apparatus 10. A belt transmission mechanism 52 for transmitting the power of the output shaft Ea of the engine E to the counter shaft 51 is provided across the right end portion of the counter shaft 51 and the output shaft Ea of the engine E. A bevel gear transmission mechanism 54 for transmitting the power of the counter shaft 51 to the relay shaft 53 is provided across the left and right intermediate portions of the counter shaft 51 and the relay shaft 53. A belt transmission mechanism 56 for transmitting the power of the relay shaft 53 to the threshing drum shaft 11a of the threshing drum 11 and the relay shaft 55 is provided across the relay shaft 53, the threshing drum shaft 11a of the threshing drum 11, and the relay shaft 55 There is. A belt transmission mechanism 58 for transmitting the power of the relay shaft 55 to the relay shaft 57 is provided across the relay shaft 55 and the relay shaft 57. A bevel gear transmission mechanism 59 for transmitting the power of the relay shaft 57 to the input shaft 12 a of the displacement conveying device 12 is provided across the relay shaft 57 and the input shaft 12 a of the displacement conveying device 12.

  A gear transmission mechanism 61 for transmitting the power of the counter shaft 51 to the relay shaft 60 is provided across the left end portion of the counter shaft 51 and the relay shaft 60. Belt transmission mechanisms 62, 63, 64, 65, 66, and 67 are provided on the lateral side of the machine (the left side of the threshing device 10).

  The power of the relay shaft 60 is applied to the rotation shaft 31 a of the main drop 31 and the rotation shaft 32 a of the first sub drop 32 over the relay shaft 60 and the rotation shaft 31 a of the main drop 31. A belt drive mechanism 62 for transmitting is provided. The belt transmission mechanism 62 includes an output pulley 68 provided on the relay shaft 60, an input pulley 69 provided on the rotation shaft 31a of the main carp 31, and an input pulley 70 provided on the rotation shaft 32a of the first subcarp 32. And a transmission belt 71 for power transmission wound around the output pulley 68 and the input pulleys 69, 70. The transmission belt 71 is also wound around a tension pulley 72 and a pulley 73.

  A belt transmission mechanism 63 for transmitting the power of the relay shaft 60 to the rotary shaft 47 a of the screw 47 is provided across the relay shaft 60 and the rotary shaft 47 a of the screw 47. The belt transmission mechanism 63 includes an output pulley 74 provided on the relay shaft 60, an input pulley 75 provided on the rotary shaft 47a of the first screw 47, and an output pulley 74 and an input pulley 75 for transmitting power. A transmission belt 76 is provided. The transmission belt 76 is also wound around a tension pulley 77. The transmission belt 76 is located on the lateral outer side (left side) of the transmission belt 71 than the transmission belt 71. A bevel gear transmission mechanism 78 is provided to transmit the power of the rotary shaft 47a of the screw 47 to the rotary shaft 48a of the cereal growing device 48 across the rotary shaft 47a of the screw 47 and the rotary shaft 48a of the cereal growing device 48. It is done.

  The power of the rotation shaft 47 a of the first screw 47 is divided by the rotation of the second sub-car 33 over the rotation shaft 47 a of the first screw 47, the rotation shaft 33 a of the second sub-car 33, and the rotation shaft 49 a of the second screw 49. A belt transmission mechanism 64 for transmitting the shaft 33 a and the rotation shaft 49 a of the second screw 49 is provided. The belt transmission mechanism 64 includes an output pulley 79 provided on the rotation shaft 47 a of the screw 47, an input pulley 80 provided on the rotation shaft 33 a of the second sub-car 33, and a rotation shaft 49 a of the second screw 49. An input pulley 81 provided, and a power transmission belt 82 wound around the output pulley 79 and the input pulleys 80 and 81 are provided. The transmission belt 82 is also wound around a tension pulley 83 and a pulley 84. The transmission belt 82 is located on the lateral outer side (left side) of the transmission belt 76 than the transmission belt 76.

  A chain transmission mechanism 86 for transmitting the power of the rotation shaft 49 a of the second screw 49 to the relay shaft 85 is provided across the rotation shaft 49 a of the second screw 49 and the relay shaft 85. A bevel gear transmission mechanism 87 for transmitting the power of the relay shaft 85 to the rotation shaft 50 a of the second reduction device 50 is provided across the relay shaft 85 and the rotation shaft 50 a of the second reduction device 50.

  The power of the rotation shaft 49a of the second screw 49 is divided into the rotation shaft of the separation drum 28 across the rotation shaft 49a of the second screw 49, the rotation shaft 28a of the separation drum 28, the relay shaft 88, and the input shaft 89a of the drive case 89. A belt transmission mechanism 65 is provided for transmitting to the input shaft 89 a of the relay shaft 88 and the drive case 89. The belt transmission mechanism 65 includes an output pulley 90 provided on the rotation shaft 49a of the second screw 49, an input pulley 91 provided on the rotation shaft 28a of the separation drum 28, and an input pulley 92 provided on the relay shaft 88. An input pulley 93 provided on the input shaft 89a of the drive case 89, and a power transmission transmission belt 94 wound around the output pulley 90 and the input pulleys 91, 92, 93. The transmission belt 94 is also wound around pulleys 95 and 96. The transmission belt 94 is located on the lateral outer side (left side) of the transmission belt 82 than the transmission belt 82.

  A belt transmission mechanism 66 for transmitting the power of the relay shaft 88 to the drive shaft 45 a of the swing drive mechanism 45 is provided across the relay shaft 88 and the drive shaft 45 a of the swing drive mechanism 45. Belt transmission mechanism 66 includes an output pulley 97 provided on relay shaft 88, an input pulley 98 provided on drive shaft 45a of swing drive mechanism 45, and a power transmission wound around output pulley 97 and input pulley 98. And a transmission belt 99 for driving the vehicle. The transmission belt 99 is also wound around the tension pulley 100. The transmission belt 99 is located on the inner side (right side) of the transmission belt 94 in the lateral direction of the vehicle.

  A belt transmission mechanism 67 for transmitting the power of the input shaft 89a of the drive case 89 to the input shaft 13a of the discharge and cutting device 13 is provided across the input shaft 89a of the drive case 89 and the input shaft 13a of the discharge and cutting device 13. It is done. The belt transmission mechanism 67 is wound around an output pulley 101 provided on the input shaft 89 a of the drive case 89, an input pulley 102 provided on the input shaft 13 a of the displacement cutting device 13, and the output pulley 101 and the input pulley 102. And a transmission belt 103 for power transmission. The transmission belt 103 is also wound around a tension pulley 104. The transmission belt 103 is located on the inner side (right side) of the transmission belt 94 in the lateral direction of the machine.

  The drive case 89 includes an input shaft 89a, an output shaft 89b, and a gear transmission mechanism 89c for transmitting the power of the input shaft 89a to the rotary shaft 29a and the output shaft 89b of the dust collecting fan 29. The output sprocket 89 b is provided with a drive sprocket 105 for driving the feed chain 9.

[Opening]
As shown in FIGS. 5 and 6, the grain sheave 44 is attached to the lateral side plate (left lateral side plate) 106 of the threshing apparatus 10 on the side where the feed chain 9 is located, in order to attach and detach the lateral side (left) An opening 106 a through which the grain sieve 44 can pass is formed. A lid 107 closing the opening 106 a is detachably attached to the left side plate 106 by a bolt 108. On the lower edge of the lid 107, a plurality of engagement pieces 107a are formed which sandwich a portion corresponding to the lower edge of the opening 106a in the left side plate 106 from both sides and engage with the portion.

  An opening 106 a is formed between the transmission belt 82 and the transmission belt 94 so that the transmission belts 82 and 94 do not overlap the opening 106 a in side view. The opening 106 a is formed on the left side plate 106 at a position above the transmission belt 82 and on the front side of the transmission belt 94. In other words, the transmission belt 82 is located below the opening 106a, and the transmission belt 94 is located behind the opening 106a.

[Tension mechanism]
As shown in FIGS. 5 and 6, a tension mechanism 109 for applying a tension to the transmission belt 82 is provided. The tension mechanism 109 is provided with a tension pulley 83 in contact with the transmission belt 82, a swingable tension arm 110 supporting the tension pulley 83, and a swing on the side where the tension pulley 83 contacts the transmission belt 82. A spring 111 for biasing, a rod 112 to which the end of the spring 111 opposite to the tension arm 110 is attached, and an operation lever 113 are provided.

  The tension pulley 83 contacts the lower path portion of the transmission belt 82 from below. The tension arm 110 can be pivoted around the same axis as the rotation shaft 47 a of the screw 47 at the most. A nut 114 for adjusting the swinging biasing force of the spring 111 and a lock nut 115 for locking are screwed on the rod 112.

  The left side plate 106 is provided with a support 116 for supporting the rod 112. The support portion 116 is located in front of the opening 106a below the upper end of the opening 106a and above the lower end of the opening 106a. The rod 112 is supported by the support portion 116 along a portion of the opening 106 a that inclines in the front lower part of the front lower portion in a side view.

  The support portion 116 is formed with a recess 116a into which the rod 112 is inserted, and a pair of engagement holes 116b into which the operation lever 113 (engagement claw 113a) is engaged. In the operation lever 113, a pair of engagement claws 113a engaged with the engagement holes 116b, a slit 113b into which the rod 112 enters to permit movement of the rod 112, a grip portion 113c, and a bending with respect to the grip portion 113c. A bent portion 113d is formed.

  In order to place the transmission belt 82 in tension, as shown in FIG. 7, with the engagement claws 113a engaged with the engagement holes 116b, the grip portion 113c is erected toward the left side plate 106. Let me go. Then, the engagement of the engagement claws 113a with the engagement holes 116b gradually deepens, and the rod 112 moves along the slits 113b toward the bending portion 113d and enters the recess 116a.

  Then, with the rising of the grip portion 113c, the bent portion 113d is placed on the support portion 116, and the nut 114 is placed on the bent portion 113d. Then, by the action of the spring 111, the tension arm 110 is urged to swing in the tension direction, and the bent portion 113 d is held between the support portion 116 and the nut 114. Thus, as the tension arm 110 is swung by the spring 111 in the direction of tension, the transmission belt 82 is in tension.

  Then, in order to bring the transmission belt 82 into a relaxed state, as shown in FIG. 8, the gripping portion 113 c is inclined from the standing posture to the lateral outside (left). Then, the bent portion 113d separates from the support portion 116, and the rod 112 moves along the slit 113b from the bent portion 113d toward the gripping portion 113c and gets out of the recess 116a.

  And with the inclination of the holding part 113c, the spring 111 becomes free length. Thus, the transmission belt 82 is in a relaxed state by releasing the swinging urging of the tension arm 110 in the direction of tension by the spring 111.

[Inside cover]
As shown in FIGS. 9 and 10, an inner cover 117 is provided to cover the left side plate 106 from the outer side (left side) of the machine. The upper cover body 19 covers the inner cover 117 from the outer side (left) of the machine and is removable from the inner cover 117. The lower cover body 20 covers a portion of the left side plate 106 below the inner cover 117 from the lateral side (left) of the vehicle and is removable from the left side plate 106. The inner cover 117 extends over the front end 10A and the rear end 10B of the threshing apparatus 10 in the longitudinal direction of the vehicle. The inner cover 117 is provided with a plurality of cover bodies configured by dividing the inner cover 117 in the longitudinal direction of the machine (in this embodiment, divided into three). Specifically, the inner cover 117 includes a front cover body 118, a middle cover body 119, and a rear cover body 120 as the cover.

  The front cover body 118 extends across the front end portion 10A of the threshing apparatus 10 and a position just before the front end of the opening 106a in the longitudinal direction of the vehicle. The front cover body 118 is attachable to and detachable from the left side plate 106. At the rear edge of the front cover body 118, front attachment portions 118a, 118b, 118c to which the front edge of the middle cover body 119 is attached are provided. The front attachment portions 118a, 118b, and 118c do not overlap the opening 106a in a side view. In a portion of the front cover body 118 connected to the front attachment portion 118b, a rising portion 118d rising toward the left is provided.

  The rear cover body 120 extends across the rear end portion 10B of the threshing device 10 and the rear end portion of the opening 106a in the longitudinal direction of the machine body. The rear cover body 120 is attachable to and detachable from the left side plate 106. At the front edge portion of the rear cover body 120, rear attachment portions 120a and 120b are provided to which the rear edge portion of the middle cover body 119 is attached. The rear attachment portions 120a and 120b do not overlap with the opening 106a in a side view.

  The middle cover body 119 extends in the front-rear direction of the machine body at a position immediately before the front end of the opening 106 a and a position immediately after the rear end of the opening 106 a. The middle cover body 119 has a front-rear length longer than the front-rear length of the opening 106 a. The middle cover body 119 overlaps the upper half of the opening 106 a in a side view. The inner cover body 119 is disposed below the lower path portion of the feed chain 9 so as not to overlap with the feed chain 9 in a side view. Thus, when the middle cover body 119 is attached and detached, the middle cover body 119 does not interfere with the feed chain 9.

  The middle cover body 119 is attachable to and detachable from the left side plate 106. The inner cover body 119 has the front edge and the rear edge thereof superimposed on the front attachment portions 118a, 118b and 118c and the rear attachment portions 120a and 120b respectively from the outer side (left side) of the airframe. Is bolted from the

  The front edge portion of the middle cover body 119 is fixed to the front mounting portions 118 a, 118 b and 118 c by bolts 121. Welding nuts (not shown) are provided in the holes corresponding to the bolts 121 among the front mounting portions 118a, 118b, 118c. A gap between the front edge of the middle cover body 119 and the rear edge of the front cover body 118 (a gap opening to the front) is covered from the front by the rising portion 118d, whereby scraps from the gap And the like are prevented from invading the inside of the inner cover body 119.

  The rear edge portion of the middle cover body 119 is fixed to the rear attachment portions 120 a and 120 b by bolts 121. Welding nuts (not shown) are provided in the holes corresponding to the bolts 121 among the rear attachment parts 120a and 120b.

  As shown in FIGS. 10 to 13, the middle cover body 119 includes, in order from the upper side, an upper inclined portion 119a, an upper vertical wall portion 119b (corresponding to a "projected portion" according to the present invention), and a lower inclined portion 119c. And a lower vertical wall portion 119d and a bent portion 119e. The upper inclined portion 119a is inclined downward to the lateral side (left side) of the airframe. The lower inclined portion 119 c extends downward from the lower end portion of the upper vertical wall portion 119 b inward in the lateral direction (right side) of the vehicle, and is inclined downward inward in the lateral direction of the vehicle. The lower vertical wall portion 119 d extends downward from the lower end portion of the lower inclined portion 119 c. The upper end portion of the front lower cover body 23 is in contact with the lower vertical wall portion 119d from the lateral outer side (left side) of the machine.

  The upper vertical wall portion 119 b extends downward from the lower end portion of the upper inclined portion 119 a. The upper vertical wall portion 119b is formed on the upper side of a portion (lower vertical wall portion 119d) in contact with the upper end portion of the lower cover member 23 on the front side in the middle cover body 119, and is higher than the lower vertical wall portion 119d. It projects outward (left) of the machine. That is, on the upper side of the portion (lower vertical wall portion 119d) where the upper end portion of the lower cover member 23 on the front side of the middle cover body 119 contacts (lower vertical wall portion 119d) An overhanging upper vertical wall portion 119b is formed.

  The bent portion 119e is bent from the lower end portion of the lower vertical wall portion 119d to the lateral outer side (left side) of the vehicle and enters the inside of the lower cover body 23 on the front side. A bent portion 23a which is bent upward is formed at the upper end portion of the lower cover body 23 on the front side, and a labyrinth structure is configured by the bent portion 119e and the bent portion 23a.

[Detachment of gren sieves]
As shown in FIG. 12, after the front lower cover body 23 is removed and removed, the middle cover body 119 is removed. Then, with the inner cover body 119 removed, after removing the lid 107, the grain sieve 44 is allowed to pass through the opening 106a. Thus, by removing the middle cover body 119, the middle cover body 119 does not get in the way when passing the grain sieve 44 through the opening 106a. Further, as described above (see FIG. 5), in side view, the transmission belts 82 and 94 do not overlap the opening 106a, and the support portion 116 is located in front of the opening 106a. When passing the opening 106a, the transmission belts 82 and 94, the rod 112 and the spring 111 do not get in the way even if the transmission belts 82 and 94 and the rod 112 and the spring 111 are not removed. As a result, the grain sheave 44 can be easily attached and detached without the middle cover body 119, the transmission belts 82 and 94, the rod 112 and the spring 111 being in the way.

[Pulley cover]
As shown in FIG. 9, FIG. 11 and FIG. 14, a pulley cover 122 is provided which covers the input pulley 75 and the output pulley 79 provided on the rotary shaft 47a of the screw 47 from below. The pulley cover 122 is provided between the lower end of the front lower cover 23 and the left edge of the machine frame 1 on the left and right. The pulley cover 122 extends forward to a position on the front side of the rotation shaft 31 a of the main rib 31 in a state of covering the transmission belt 76 from below. The pulley cover 122 is bolted to a stay 123 (two places in the front and rear direction) extending outward from the left edge of the machine body frame 1 outward (leftward).

  The pulley cover 122 is formed with a large number of long holes 122 a long in the front and rear direction. A plurality of these long holes 122a are arranged laterally and longitudinally. The left end portion of the pulley cover 122 is provided with a rising portion 122 b that rises upward. At an upper end portion of the rising portion 122b, a bent portion 122c which is bent to the lateral outer side (left side) of the vehicle body is formed. The front end portion and the rear end portion of the pulley cover 122 are not provided with rising portions that rise upward.

  According to such a configuration, even if cutting chips carried by the wind of the main carp 31 or the like (for example, scraps of cutting grain carried by the feed chain 9) are deposited on the pulley cover 122, the pulley cover When the scale chips 122 flow in the longitudinal direction of the machine body, they will fall from the front end portion and the rear end portion of the long hole 122 a and the pulley cover 122. At that time, as described above, since the long holes 122a are long in the front-rear direction, the chips on the pulley cover 122 are likely to fall out of the long holes 122a when flowing in the longitudinal direction of the machine.

[Another embodiment]
(1) In the above embodiment, the support portion 116 is located in front of the opening 106a below the upper end of the opening 106a and above the lower end of the opening 106a, but in front of the opening 106a , And may be located above the upper end of the opening 106a. Alternatively, the support portion 116 may be located below the lower end of the opening 106 a in front of the opening 106 a. Alternatively, the support 116 may be located above, below or behind the opening 106 a.

(2) In the above embodiment, the transmission belt 94 is wound around the separation drum 28 (input pulley 91), but may not be wound around the separation drum 28.

(3) In the above embodiment, the transmission belt 94 is located on the lateral side (left side) of the transmission belt 82, but may be located on the lateral side (right side) of the transmission belt 82.

(4) In the above embodiment, the inner cover 117 is divided into three in the longitudinal direction of the vehicle, but may be divided into two or four or more.

(5) In the above embodiment, the upper end portion of the front lower cover body 23 is in contact with the lower end portion (lower vertical wall portion 119d) of the middle cover body 119 from the lateral outer side (left side) of the airframe. It does not have to be in contact with the lower end portion (lower vertical wall portion 119 d) of 119.

(6) In the above embodiment, the lower end portion (the lower vertical wall portion 119d) of the middle cover body 119 is formed with the bent portion 119e which is bent to the lateral outer side (left side) of the machine body and enters the lower cover body 23 on the front side. However, the bent portion 119e may not be formed.

(7) In the above embodiment, the portion of the middle cover body 119 on the upper side of the portion (lower vertical wall portion 119d) in contact with the upper end portion of the lower lower cover body 23 on the front side is more horizontal than the lower vertical wall portion 119d. Although the upper vertical wall portion 119b overhanging in the direction (left) is formed, the upper vertical wall portion 119b may not project outward (leftward) from the lower vertical wall portion 119d.

(8) As shown in FIG. 15, when the middle cover body 119 is removed, the tension mechanism 109 (operation lever 113) may be exposed in a side view. As shown in FIG. 15, the middle cover body 119 extends forward to a position on the front side of the position of the front end of the middle cover body 119 (see FIG. 9) according to the above embodiment. Specifically, in the other embodiment (1), when the middle cover body 119 is removed, the middle cover body 119 exposes the upper end of the operation lever 113 so that the tension mechanism 109 (the operation lever 113) is exposed in a side view. It extends forward to a more front position. According to such a configuration, by removing the middle cover body 119, adjustment of the tension mechanism 109 (operation of the operation lever 113) and confirmation can be easily performed.

  The present invention can also be used for ordinary combine, as well as self-eliminating combine.

10 threshing device 11 threshing cylinder 19 upper cover body (outer cover)
20 Lower cover body (lower cover)
Reference Signs List 30 rocking sorting device 34 first collection unit 35 second collection unit 44 grain sieve 47 first screw 47a first screw rotation shaft 49 second screw 49a second screw rotation shaft 64 belt transmission mechanism 82 transmission belt 106 side plate 106a Opening 109 Tension mechanism 117 Inner cover 118 Front cover body (cover body)
119 Medium cover body (cover body, removable cover body)
119b Upper vertical wall (projected part)
119e bent part 120 back cover body (cover body)

Claims (5)

A combine equipped with a threshing device for threshing harvested rice bran, comprising
The threshing device includes a threshing cylinder, and a rocking and sorting device provided below the threshing cylinder and rocking and sorting objects to be sorted.
The swing sorting apparatus has a fine sieve for fine sorting which is detachable from the lateral side of the machine body,
An opening through which the gren sheave can pass is formed in a side plate of the threshing device,
An inner cover that covers the lateral side plate from the lateral side of the machine;
And an outer cover which covers the inner cover from the lateral and outer sides of the machine and which is detachable from the inner cover,
The inner cover has a plurality of cover bodies configured by dividing the inner cover in the longitudinal direction of the airframe,
The combine which the cover body which overlaps with the said opening by a side view among the said several cover bodies is detachable with respect to the said side plate. A lower cover is provided to cover a portion of the side plate lower than the inner cover from the lateral side of the machine body,
The combine according to claim 1, wherein the upper end of the lower cover is in contact with the lower end of the removable cover from the outer side of the machine.   The combine according to claim 2, wherein a bent portion which is bent outward in the lateral direction of the machine body and enters the inside of the lower cover is formed at a lower end portion of the removable cover body.   A portion of the removable cover body above the portion with which the upper end of the lower cover is in contact is formed with a projecting portion that protrudes outward in the lateral direction of the machine than the portion with which the upper end of the lower cover is in contact. The combine according to item 2 or 3. The threshing apparatus is provided below the rocking and sorting apparatus, and is provided at the bottom of the rocking and sorting apparatus at the rear of the rocking sorting apparatus, and at the back of the rocking sorting apparatus. And a second collecting unit for collecting second grains.
The first collecting section has a first screw for conveying the grain in the lateral direction of the machine,
The second recovery unit has a second screw for conveying the grain in the lateral direction of the machine,
A belt transmission mechanism provided with a transmission belt for power transmission and provided over the rotation shaft of the first screw and the rotation shaft of the second screw is provided on the side of the fuselage on the side where the side plate is located. ,
A tension mechanism for applying tension to the transmission belt;
The combine according to any one of claims 1 to 4 which is constituted so that said tension mechanism may be exposed by side view when said removable cover body is removed.

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