JP3347838B2 - Combine grain stalk transporter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a culm length detecting means for detecting a culm length of a cut culm, and a handling depth for adjusting a handling depth of a threshing apparatus in a handling room based on information of the culm length detecting means. adjusting means and is provided, wherein the holding conveyance state for conveying toward the rear side of the threshing chamber to hold the culms reaper at a side of the threshing chamber, the entire culm of the bush ToKoku稈threshing chamber There is provided a cereal culm conveying means that can be switched to a state in which all culms are put into the culm, and a control means for switching and controlling the cereal culm holding state of the cereal culm conveying means.
The present invention relates to a grain culm conveying device of a combined combine.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned combine grain conveying apparatus has been disclosed in Japanese Utility Model Laid-Open No. 2-123837 and Japanese Utility Model Laid-open No.
For example, as shown in Japanese Patent No. 035, etc., for example, a cereal stalk conveying means is provided by a feed chain that locks and conveys threshing cereals and a rail portion or the like elastically urged toward the feed chain in a state facing the feed chain. For example, based on short culm detection information and the like of the culm length detecting means provided with a pair of cereal culm presence detection sensors provided for adjusting the handling depth in the threshing device, based on the start end or end of the cereal culm transport means The gripping state of the cereal culm in the section is released, and the cereal culm conveying means is controlled to be switched from the holding and conveying state to the whole culm input state.

[0003]

According to the above prior art, in order to avoid collision of the pre-cutting unit with the ridge, for example, when approaching a ridge while performing a cutting operation, the prior-cutting unit is provided with a pre-cutting unit. When the cutting work is performed while being raised, the cutting height for the planted grain culm becomes extremely high, but when such an extremely short cut grain culm is conveyed, a pair of the above-mentioned handling depth adjustment is adjusted. Among the cereal stalk presence / absence detection sensors, the cereal culm is not detected even by the sensor located on the side of the stock, so that the cereal culm conveying means is operated as the entire culm input state using the information of non-cereal culm detection as short culm detection information. In this way, it is possible to avoid that sufficient threshing cannot be performed when the tip side slightly touches the handling cylinder in the handling room, and all culms are thrown into the handling room to perform threshing and reduce unhandled residue. Things.

However, according to the above-mentioned prior art, the entire culm is put into a short culm based on the detection information of a grain culm presence / absence detection sensor for adjusting the handling depth, that is, when the culm is shorter than the adjustable range of the handling depth. Therefore, in practice, it is operated in the same whole culm input state with respect to the cut culm of a short culm having a long and short culm, and there is a possibility that an appropriate all culm input operation is not performed. For example, if the culm length of the harvested grain culm is slightly shorter than the adjustable range of the handling depth and the handling process is possible even if it is transported in the holding state, if all the culms are thrown in, the threshing device On the other hand, when the unnecessary load increase is caused, when the entire culm is introduced at the terminal end of the grain culm conveying means for an extremely short culm that cannot be handled in the holding state, the handling process becomes insufficient. And left untreated.

[0005] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to allow all culms to be thrown in in response to cut grain culms having a short or long culm length even if the culm is short. The problem is to solve the problem.

[0006]

According to a first feature of the combine grain conveying apparatus of the present invention, the culm length detecting means comprises:
When the culm length of the harvested grain culm is shorter than the range in which the handling depth can be adjusted by the handling depth adjusting means, the culm length of the harvested grain culm can be handled in the handling chamber in a state of being held and transported by the grain culm transporting means. The first culm length state, or the second culm length state, which is an extremely short culm that cannot be handled in the holding and conveying state, is configured to be detected. The front-side input state in which the front part in the culm transport direction is input with all culms, and the rear-side all culm input state in which the rear part is input with all culms are selectively operable, and the control means is the culm length detection means. Based on the information of the above, while the culm length of the harvested culm is in the first culm length state, the cereal culm conveying means is operated to the rearward thrown state, while the culm conveying means is in the second culm length state. It is configured to operate in the front side closed state. To the point it is there.

In a second characteristic configuration, the culm length detecting means is juxtaposed at intervals in the culm length direction on the lower side in the grain culm transport direction from a location where the handling depth is adjusted by the handling depth adjusting means. A pair of handling depth adjustment sensors, and a very short culm detection sensor arranged closer to the base of the stock than the pair of handling depth adjustment sensors, wherein the handling depth adjustment means is provided with the pair of handling depth adjustment sensors. The tip of the harvested grain culm is adjusted so that the tip of the harvested grain culm is located between the sensors for adjusting the depth, and the culm length detecting means is adjusted so that the handling depth adjustment means is adjusted to the deepest handling side. The first culm length state is detected when the first culm length sensor is located between the stock side sensor of the pair of handling depth adjusting sensors and the ultrashort culm detection sensor, and the tip of the cut grain culm is the ultrashort culm. It is configured to detect the second culm length state when the second culm length state is located closer to the root of the stock than the detection sensor. Lies in the fact that is.

[0008]

According to the first characteristic configuration of the present invention, when the culm length of the harvested grain culm is within the range in which the handling depth can be adjusted by the handling depth adjusting means, the cereal culm transporting means is provided on the side of the handling chamber. The harvested culm is operated in a holding and transporting state in which the culm is held and transported toward the rear side of the handling room, and the culm length of the harvested cereal culm is shorter than the adjustable range of the handling depth. In the first culm length state in which the handling process in the handling room is possible in the holding and transporting state, the grain culm transporting means is operated to a rearward throwing state in which the rear portion in the grain culm transport direction is thrown in all culms, and The second is an extremely short culm in which the culm length of the harvested cereal culm is shorter than the above-mentioned adjustable range of the handling depth, and the culm conveying means cannot handle the culm in the holding and transporting state.
In the culm length state, the cereal culm conveying means is operated to a front-side input state in which all the culms of the front portion in the cereal culm conveying direction are input.

Further, according to the second characteristic configuration, the handling depth adjusting means comprises a pair of handling depths juxtaposed at intervals in the culm length direction on the lower side in the grain culm transport direction from the handling depth adjustment point. It is adjusted so that the tip of the cut cereal stem is located between the sensors for adjusting the height. On the other hand, when the tip of the harvested grain culm is not located between the pair of handling depth adjustment sensors in a state where the handling depth adjusting means is adjusted to the deepest handling side, the tip of the harvested grain culm is positioned in the pair of handling depths. In the first culm length state, when located between the stock side sensor of the depth adjustment sensors and the extremely short culm detection sensor disposed closer to the stock side than the pair of handling depth adjustment sensors. When the grain culm conveying means is operated to the rear side throwing state, and when the tip of the harvested grain culm is located closer to the stock than the ultrashort culm detection sensor, the grain culm conveying means is determined to be in the second culm length state. Is actuated in the forward closing state.

[0010]

Therefore, according to the first characteristic configuration of the present invention, when the culm length of the harvested grain culm is shorter than the adjustable range of the handling depth, the handling chamber can be handled in the holding and transporting state. After being handled and handled in the holding and transporting state on the front side, the entire culm is thrown in at the rear side of the handling room, avoiding unnecessary load increase on the threshing device, and the culm length of the harvested grain culm in the holding and transporting state. In the case of extremely short culm which cannot be handled, all culms are thrown in at the front side of the handling room and threshing will be sufficiently performed over the entire width of the handling room, so that it is possible to respond to the length of the culm of the short culm precisely Then, it became possible to put all culms in the proper state.

Further, according to the second characteristic configuration, based on the information of the handling depth adjustment sensor arranged on the lower side in the grain stalk transport direction from the handling depth adjustment point, that is, based on the feedback information. It is possible to detect the culm length state of the short culm with a simple configuration in which a very short culm detection sensor is added to the sensor for adjusting the treatment depth at the same time while performing the treatment depth adjustment stably. Suitable means for realizing the effect of the configuration is obtained.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the combine is configured by connecting a reaping unit 4 to a front portion of a body including a pair of right and left crawler traveling devices 1, a threshing device 2, a control unit 3, and the like so as to be able to move up and down around a horizontal axis P. It is composed.

The cutting unit 4 includes a raising device 5 for raising the planted grain culm, a cutting blade 6 for cutting the root of the planted grain culm, and an auxiliary transport for collecting the harvested grain culm and transporting the harvested culm backward. The apparatus 7 includes a vertical conveying device 9 and the like that transfers the harvested culm to the feed chain 8a of the threshing device 2 while gradually turning over the harvested grain culm,
It is configured to swing up and down by driving the up and down cylinder 10. In the normal harvesting operation, the mowing unit 4 is controlled to move up and down so as to maintain the set height with respect to the ground. However, the mowing unit 4 can also be moved up and down by manual operation of the elevating lever 11 provided on the control unit 3. When the mowing unit 4 is raised to a set height or more, an automatic cutting mechanism for automatically cutting off the power to the mowing unit 4 by a mechanical linking mechanism and stopping the driving of the mowing unit 4 is provided. .

The vertical conveying device 9 comprises a stock conveying device 9a for nipping and conveying the stem side of the grain culm, a head conveying device 9b for locking and conveying the spike side of the grain culm, and a spike guide plate 9c. 4 is supported so as to be swingable around the same axis as the swing axis P. Then, the rocking position of the grain culm from the auxiliary transport device 7 is changed in the culm length direction by oscillating the electric motor M1 with a gear-type reduction mechanism (hereinafter, referred to as a handling depth motor). The handling depth can be adjusted.

That is, the grain stalk is brought into contact with the grain stalk transport path for transporting the harvested grain stalk toward the threshing device 2 at a position below the grain stalk transport direction with respect to the handling depth adjustment point by the handling depth motor M1. Then, a pair of handling depth adjustment sensors S1 and S2, which are configured in a switch type that swings and turns on and are juxtaposed at intervals in the culm length direction, and the pair of handling depth adjustment sensors S1 and S2 A culm length detecting means S for detecting the culm length of the harvested grain culm is provided, provided with a very short culm detecting sensor S3 disposed closer to the root of the stock than S2. This culm length detecting means S (specifically, a pair of The control device 12 described below controls the operation of the handling depth motor M1 based on the information from the handling depth adjustment sensors S1 and S2), so that the handling depth in the threshing device 2 is independent of the culm length of the planted grain culm. Can always be adjusted to an appropriate state. Specifically, the sensor S1 (hereinafter, referred to as a tip sensor) located on the tip side is turned off so that the tip of the harvested grain culm is located between the pair of handling depth adjustment sensors S1 and S2. In this state, the sensor S2 (hereinafter referred to as “stock side sensor”) located on the stock side is adjusted to be turned on. As described above, the handling depth motor M1 constitutes a handling depth adjusting means for adjusting the handling depth of the threshing apparatus 2 in the handling room A.

The swinging fulcrum of the vertical transfer device 9 includes
There is provided a potentiometer type supply position sensor 13 for detecting which position the current handling depth adjustment position of the vertical conveyance device 9 is at. Further, a stock sensor 14 for detecting whether or not the grain culm is being conveyed is provided at a starting end of the vertical conveyance device 9, and a stock shaft conveyance device 9 is provided on a drive shaft portion of the vertical conveyance device 9.
A transport rotation sensor 19 for detecting the grain culm transport state of a is provided.

The threshing apparatus 2 has a handling room A for handling and processing the harvested grain culms received from the vertical transport device 9, and holds the harvested grain culm at the side of the handling room A and is behind the handling room A. a holding conveyance state for transporting the side, all the culm on state and the switching standing a cereal稈搬feed means H for turning on the entire culm of the bush ToKoku稈the threshing chamber a
And As shown in FIG. 2, the grain culm conveying means H includes a feed chain 8a for conveying the cut culm in a locked state, and a clamping rail 8 facing the feed chain 8a.
b, and a plurality of compressed coil springs 18 that press the holding rail 8b toward the feed chain 8a. That is, the holding rail 8b is configured by pivotally connecting the plurality of divided bodies by the pivot pins 23, and the rod 24 connected to each pivot pin 23 is vertically slidable by the elongated frame body 25. , And each of the coil springs 18 presses and biases each of the pivot pins 23 toward the feed chain 8a in a state of being fitted to the rod 24.
In this way, the spike side is handled in the handling room A while the grain stem side is pinched and conveyed, and is processed.

When the culm length of the harvested grain culm is shorter than the range in which the handling depth can be adjusted by the handling depth motor M1, the culm length detecting means S is adapted to hold the culm length of the harvested grain culm by the grain culm carrying means H. In the first culm length state in which the handling process in the handling room A is possible, or in the second culm length state which is an extremely short culm in which the handling process in the holding and transporting state is impossible. Is configured. Specifically, in a state where the handling depth motor M1 is adjusted to the deepest handling side, the tip of the harvested grain culm is moved by the pair of handling depth adjustment sensors S1 and S2.
Of the stock origin side sensor S2 and the very short culm detection sensor S3
The first culm length state is detected when the first culm length state is detected, and the second culm length state is detected when the ears of the harvested grain culm are located closer to the stock than the ultrashort culm detection sensor S3.

As shown in FIG. 4, the frame 25
Two electric motors M are located at upper front and rear positions.
2 and M3 (hereinafter referred to as a releasing motor) are provided, and two telescopic arms 30 are provided which are operated by the gears of the releasing motors M2 and M3 to extend and contract in the front-rear direction. The upper ends of the first arms 31 pivotally supported by the frame body 25 are pivotally connected to the section. On the other hand, among the plurality of coil springs 18, each washer 1 at the upper end of the second and fifth coil springs 18 from the front.
8a, one end of a U-shaped second arm 33 pivotally supported by the frame body 25 is pivotally connected to the other end of the second arm 33, and the other end of each second arm 33 is connected to the first arm via a link 32. 31 are pivotally connected to the lower ends. Each washer 18 at the upper end of the third and sixth coil springs 18 from the front.
The arm portion 31a of the first arm 31 is pivotally connected to a. In addition, among the plurality of coil springs 18, the second
The upper end of the coil spring 18 not connected to the arm 33 and the arm portion 31a of the first arm 31 is
Has been taken by

In the above, when the front side release motor M2 is contracted, as shown in FIG.
0, first arm 31, link 32, and second arm 33
Are operated in conjunction with each other, and the proximal end of the front (second to third from the front) coil spring 18 is pulled upward. As a result, the compressed state of the front coil spring 18 is released and the downward urging force is reduced, so that the pressing force against the holding rail 8b is weakened, and the front feed chain 8a is reduced.
And the holding force of the grain stalk held between the holding rails 8b is weakened. On the other hand, when the rear side release motor M3 is contracted, the rear side (5th to 6th from the front) is operated by the same operation.
The base end side of the coil spring 18 is pulled up. Therefore, the compressed state of the coil spring 18 on the rear side is released and the downward urging force is reduced, so that the holding rail 8 b
And the holding force of the grain stalk held between the feed chain 8a and the sandwiching rail 8b on the rear side is weakened. Therefore, the whole culm throwing means H is
As the input state, a front-side input state in which the front part in the grain culm transport direction is input to all culms (when the front-side releasing motor M2 is contracted), and a rear-side input state in which the rear part is input to all culms ( (When the rear side release motor M3 is contracted).

The combine is configured to automatically carry out the cutting operation at the ridge, and to prevent the remaining culm having a short culm length caused by the cutting operation from being left untreated. That is, when an instruction switch 15 for starting a mowing operation provided on the control unit 3 is operated, a control device 1 described later is operated.
2 automatically raises the mowing unit 4 and operates the handling depth motor M1 to the deepest handling side, and further, as described later,
The culm conveying means H is switched from the cereal culm holding state to the all culm input state, and all the culms of the cut cereal culm are introduced into the handling room A.

Next, the control structure will be described with reference to FIG.
As shown in FIG. 1, a control device 12 using a microcomputer is provided, and the control device 12 includes the pair of handling depth adjustment sensors S1 and S2, the very short culm detection sensor S3,
The detection information of the supply position sensor 13, the stock sensor 14, the transport rotation sensor 19, and the instruction switch 15 are input. On the other hand, the control device 12 outputs respective drive signals to the lifting cylinder 10, the handling depth motor M1, the front side release motor M2, and the rear side release motor M3.

A control means 1 for controlling switching of the cereal culm holding state of the cereal culm conveying means H using the control device 12.
When the culm length of the harvested grain culm is in the first culm length state, the control means 100 contracts the rear side release motor M3 based on the information of the culm length detection means S, thereby performing the contraction operation of the grain. While the culm conveying means H is operated in the rear side input state, the front side releasing motor M2 is contracted to operate the grain culm conveying means H in the front side input state in the second culm length state. It is configured as follows.

The culm conveying speed of the culm conveying device 9a is detected from the detection value of the conveying rotation sensor 19, and from this information, a fixed distance from the installation position of the culm length detecting means S to the conveying start end of the feed chain 8a. It is determined whether the culm has been conveyed. In addition, since the moving speed of the feed chain 8a is a predetermined constant speed, all the culm input positions of the harvested grain culm from the conveyance start end of the feed chain 8a,
That is, in the front-side closed state, the second coil spring 1 from the front
At the position of No. 8 and the rear side insertion state, the transport time to the position of the fifth coil spring 18 from the front can also be obtained as a fixed time. Then, when the control unit 12 causes the culm conveying means H to perform the entire culm loading operation, the harvested cereal culm is conveyed from the installation position of the culm length detecting means S to the conveying start end of the feed chain 8a, and After a lapse of a certain time required for transport from the transport start end of the chain 8a to the front or rear side all culm insertion position, the front or rear side release motors M2 and M3 are contracted to perform the all culm input state. It is configured to switch to.

Hereinafter, the control procedure of the control device 12 will be described. As shown in FIG. 6, it is detected that the stock sensor 14 is in the on state and the grain culm is in the transport state, and when the instruction switch 15 is operated, the operation of the automatic cutting stop mechanism is suppressed and the cutting unit is controlled. 4 and raise the handling depth motor M1 to the deepest handling side to maintain that state [steps 1-5]. Incidentally, when the instruction switch 15 is not operated, normal handling depth control is executed [step 6].

Then, in a state where the transport state is detected from the detection information of the transport rotation sensor 19 and the vertical transport device 9 is confirmed to be at the deepest handling side supply position from the detection information of the supply position sensor 13, When both the side sensor S1 and the stock side sensor S2 are in the off state, the following processing is performed according to the state of the very short culm sensor S3. That is, the very short culm sensor S
3 is in the first culm length state, the grain culm is detected by each of the sensors S1,
The feed chain 8 is transported a fixed distance from the location of S2 and S3 to the start end of the feed chain 8a.
After a lapse of a certain period of time required for the conveyance from the start end of a to the rear insertion position, the rear release motor M3 is contracted to operate the rear insertion state. On the other hand, if the extremely short culm sensor S3 is in the off state, the culm is in the second culm length state.
After a certain time required for conveyance from the start end of the feed chain 8a to the front insertion position has elapsed, the front release motor M2 is contracted to change the front insertion state. Activate [Step 7
~ 14].

When the feeding of the cereal culm with a short culm is completed during the whole culm loading operation and one of the tip side sensor S1 and the stock side sensor S2 is turned on, each sensor S
1, S2, and S3 are conveyed to the starting end of the feed chain 8a from the location where the feed chain 8a is fed, and when a certain period of time required for conveyance from the starting end of the feed chain 8a to the front side or the rear side loading position elapses, the front side or The rear release motors M2 and M3 are extended to return to the normal holding and conveying state (steps 15 to 17).

[Alternative Embodiment] In the above-described embodiment, the culm length detecting means S is provided in the vertical transport device 9 on the lower side of the handling depth adjusting portion M1 of the mowing portion 4 by the handling depth adjusting means M1. However, besides this, it may be provided, for example, at the start end position of the feed chain 8a for receiving the harvested grain culm from the vertical conveying device 9, at the position immediately before the entrance of the handling room A, or at the handling depth adjusting means M1. For example, the grain stalk raising device 5 of the mowing part 4 may be provided not on the lower side but on the better side than the adjustment point.

In the above embodiment, the culm length detecting means S includes a pair of handling depth adjusting sensors S1 and S2 and a very short culm sensor S3.
Been shown as comprising a total of three sensors, but specific configurations such as the number of sensors provided in culm length detecting means S is not limited thereto. In this case, the configuration for detecting whether the culm length of the harvested grain culm is the first culm length state or the second culm length state is appropriately changed in accordance with the specific constitution such as the number of the sensors.
Also, the sensors S1, S2, and S3 do not swing in contact with the cereal culm as in the embodiment, but may use a non-contact sensor such as a photoelectric sensor to detect the presence or absence of the cereal culm.

In the above embodiment, the handling depth adjusting means M1
Has been described in which the vertical conveying device 9 of the mowing unit 4 is rotated to move the receiving point of the grain culm in the culm length direction. However, the present invention is not limited to this. For example, the grain culm of the threshing device is conveyed in a holding state. The grain culm conveying means H may be moved in the culm length direction.

In the above embodiment, the cereal culm conveying means H is
The feed chain 8a for locking and transporting the culm, the rail portion 8b pivotally connected to the split rail opposed thereto, and the coil spring 18 for pressing the rail portion 8b toward the feed chain 8a are shown. However, the present invention is not limited to this. For example, a feed belt with a projection may be used instead of the feed chain 8a, and the rail portion 8b is not limited to the one in which the divided rails of the embodiment are pivotally connected. It is possible to adopt a structure such as a spring body (a leaf spring or the like) or an elastic material such as rubber. Also, instead of clamping the grain culm between the rail portion 8b that does not move in the grain culm transport direction and the feed chain 8a moving in the grain culm transport direction as in the above embodiment, for example, the grain culm is clamped from both sides. The specific configuration of the cereal culm conveying means H can be variously changed, such as a pair of upper and lower pinching and conveying devices both moving in the cereal culm conveying direction to convey cereal culm.

The cereal culm transport means H is configured to be selectively operable between a forward insertion state in which the entire front portion in the cereal culm transport direction is thrown in all culms and a rearward insertion state in which the rear portion is thrown in all culms. The specific configuration to be performed is not limited to that of the embodiment. For example, each support that commonly receives the upper end of the coil spring 18 on the front side or the rear side may be pulled upward to release the holding of the grain stalk. Further, as the power generating means for releasing, a hydraulic cylinder or the like may be used instead of the electric motors M2 and M3.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a front side view of a combine.

FIG. 2 is a side view of a grain culm conveying means.

FIG. 3 is a side view showing a state in which all culms are put into operation by the cereal culm conveying means.

FIG. 4 is a front sectional view showing an entire culm loading operation mechanism of the grain culm conveying means.

FIG. 5 is a block diagram of a control configuration.

FIG. 6 is a flowchart of a control operation.

[Explanation of symbols]

 2 Threshing device S Culum length detecting means A Handling room M1 Handling depth adjusting means H Grain culm transporting means 100 Control means S1, S2 Handling depth adjusting sensor S3 Very short culm detecting sensor

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tokumune Ozaki 64 Ishizukita-cho, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory (72) Inventor Toshikatsu Otani 64 Ishizukita-machi Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house (72) Inventor Koji Yamagata 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory Co., Ltd. (72) Inventor Tamotsu Seiya 64, Ishizu-Kitamachi Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Inventor Suezo Ueda 64, Ishizukita-cho, Sakai City, Osaka Prefecture (72) Inside the Kubota Sakai Works, Inc. 64 Ishizu-Kitacho, Ishizu-shi Kubota Sakai Works Co., Ltd. (56) References JP-A-4-27313 (JP, A) JP-A-2-1223837 (JP, ) JitsuHiraku flat 4-124035 (JP, U) JitsuHiraku flat 5-34832 (JP, U) Tokuoyake Akira 60-57808 (JP, B1) (58 ) investigated the field (Int.Cl. ^7, DB name) A01F 12/10 A01D 61/00

Claims (2)

(57) [Claims] 1. A culm length detecting means (S) for detecting a culm length of a harvested grain culm, and a handling depth of a threshing device (2) in a handling chamber (A) based on information of the culm length detecting means (S). And a handling depth adjusting means (M1) for adjusting the pressure, and holding and transporting the harvested culm at the side of the handling room (A) and transporting the harvested culm toward the rear side of the handling room (A). and state, all culm on state and the switched freely cereal稈搬feed means for introducing whole culms of the bush ToKoku稈said threshing chamber (a) and (H), culms retention of the grain稈搬feeding means (H) A combine grain culm conveying device provided with a control means (100) for switching and controlling a state, wherein the culm length detecting means (S) determines the culm length of a cut cereal culm by the handling depth adjusting means (M1). When the handling depth is shorter than the adjustable range, the culm length of the harvested cereal culm is held and transported by the cereal culm transporting means (H) and the handling chamber is held. It is configured to detect whether it is the first culm length state in which the handling process in A) is possible or the second culm length state which is an extremely short culm in which the handling process in the holding and transporting state is impossible. The cereal culm conveying means (H) is configured to be selectively operable between a front-side input state in which the front part in the cereal culm conveying direction is input with all culms and a rear-side input state in which the rear part is input with all culms. The control means (100), based on the information of the culm length detection means (S), when the culm length of the harvested cereal culm is in the first culm length state, moves the cereal culm transport means (H) to the rear side input state. A combine grain conveying device configured to actuate the grain conveying means (H) to the front throw-in state in the second stem length state. 2. A pair of culm length detecting means (S) arranged side by side in the culm length direction at a lower side in a grain culm transport direction than a handling depth adjusting point by the handling depth adjusting means (M1). And a very short culm detection sensor (S3) disposed closer to the base of the stock than the pair of handling depth adjusting sensors (S1) and (S2). Wherein the handle depth adjusting means (M1) is adjusted so that the tip of the harvested grain culm is positioned between the pair of handle depth adjusting sensors (S1) and (S2); (S) is the handling depth adjusting means (M
In the state where 1) is adjusted to the deepest handling side, the tip of the harvested grain culm is connected to the stock side sensor (S2) of the pair of handling depth adjustment sensors (S1) and (S2) and the very short culm. The first culm length state is detected when the first culm length state is detected between the detection sensors (S3), and the tip of the cut grain culm is detected by the extremely short culm detection sensor (S3).
2. The combine grain culm conveying device according to claim 1, wherein the second culm length state is detected when the second culm length state is located closer to the root of the plant than in (3).