JP2000279023A - Apparatus for conveying grain culm of threshing device for combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smooth the take-over of grain culms from a feed chain to an auxiliary chain, optimize the posture of the grain culms for feed to a threshing chamber and improve the threshing efficiency. SOLUTION: This apparatus for conveying grain culms is obtained by firstly installing a feed chain 6 for taking over the reaped grain culms from the side of a,reaping pretreatment device 3 and feeding the grain culms to a threshing device 1, an auxiliary feed chain 9 arranged side by side on the inside of the starting end of the feed chain 6 and a positional changing means F for the auxiliary feed chain 9 capable of vertically changing the position of the auxiliary feed chain 9 and secondly arranging a feed regulating device 4 for regulating the reaped grain culm feed depth from the side of the reaping pretreatment device 3 to the threshing device 1, the feed chain 6 for taking over the reaped grain culms from the side of the feed regulating device 4 and feeding the reaped grain culms to the threshing device 1, the auxiliary feed chain 9 installed side by side on the inside of the starting end of the feed chain 6, the positional changing means F for the auxiliary feed chain 9 capable of vertically changing the position of a conveying locus of the auxiliary feed chain 9 and a linking means S for operating the positional changing means F for the auxiliary feed chain 9 in relation to the operation of the feed regulating device 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a culm conveying device for a threshing device for a combine.

[0002]

2. Description of the Related Art Conventionally, a combine has been provided with a device for automatically adjusting the handling depth in order to maintain an appropriate handling depth regardless of the culm length of the grain culm. Also, when cutting and threshing work on the ridge (headland), the cutting device is raised to a position higher than the normal cutting height to cut the culm, so that the cut culm becomes extremely short. It becomes difficult to hold and transport by taking over the feed chain from the processing device side. For this reason, a configuration in which an auxiliary feed chain for transporting the grain stalk to the entrance of the handling room is provided inside the starting end of the feed chain has been attempted.

[0003]

Usually, grain culm transport in the combine is performed when the grain culm is supplied from the pre-cutting device to the threshing device, with the spike tip slightly ahead of the stock root in the handling room. It is said that the supply is suitable for increasing the threshing efficiency. However, as in the prior art described above, in a configuration in which an auxiliary feed chain for transporting a cereal culm to the entrance of the handling chamber is provided inside the starting end of the feed chen, the cereal culm is positioned on both sides from the pre-cutting treatment device side. When the culm is extremely short when it is taken over by the feed chain, the root side of the stock is not sufficiently clamped by the feed chain. Will rely on.

However, in addition to such a background, in the prior art, the relative positions of the feed chain and the auxiliary feed chain are fixed. For this reason, if the feed trajectory of both feed chains is fixed at a relative position suitable for taking over and transporting a grain culm of a standard culm length, when a very short grain culm is conveyed, the root side of the stock is reduced. The feed chain is not sufficiently pinched and transported by the feed chain, and the auxiliary feed chain does not have sufficient transport action on the tip side. There has been a problem that the spike side of the cereal stem is delayed and the stock side is supplied to the handling room in a leading position, and the threshing efficiency is reduced.

[0005]

The present invention employs the following technical means to solve the above-mentioned problems.
That is, a feed chain 6 for taking over the harvested culm from the pre-cutting device 3 and supplying it to the threshing device 1, and an auxiliary feed chain juxtaposed inside the starting end of the feed chain 6. And a auxiliary feed chain position changing means F for changing the conveying trajectory of the auxiliary feed chain 9 up and down. Item 2. A supply adjusting device 4 for adjusting the supply depth of the harvested grain culm from the pre-cutting treatment device 3 to the threshing device 1, and a harvested grain culm taken from the supply adjusting device 4 and supplied to the threshing device 1. Feed chain 6, an auxiliary feed chain 9 juxtaposed inside the start end of the feed chain 6, and an auxiliary feed chain position changing means F for changing the transport trajectory of the auxiliary feed chain 9 up and down. And before Auxiliary connection with the operation of the feed adjusting device 4 Fi - is obtained by the configuration of the culms transport apparatus combine for threshing apparatus characterized in that a cooperative means S for operating the Dochen position changing means F.

[0006] In the combine operation, the culm to be planted in the field is cut by the pre-cutting device 3 and the cut culm is transferred from the pre-cutting device 3 to the feed chain 6 and the auxiliary feed chain 9. It is supplied to the threshing apparatus 1 and threshing is performed by the action of a handling cylinder provided inside the threshing apparatus 1. According to the first aspect of the present invention, for example, when the harvested grain culm is a short culm, when the auxiliary feed chain position changing means F is operated, the transport trajectory of the auxiliary feed chain 9 moves upward. . Thereby, when the short culm is taken over from the pre-cutting device 3, the transport action acting on the short culm is strengthened, and the transfer from the pre-cutting device 3 to the feed chains 6 and 9 is performed smoothly. The occurrence of spilling of the culm is reduced, and the spike side of the cereal culm is delayed and supplied to the handling room with the stock side in a leading position, thereby reducing the reduction in threshing efficiency.

According to the second aspect of the present invention, when the harvested culm is a short culm, the depth of supply of the harvested grain culm from the supply control device 4 to the threshing apparatus 1 by the operation of the supply control device 4. When the feed position is adjusted to the deep handling side, the auxiliary feed chain position changing means F is operated by the connecting means S in connection with the operation of the supply adjusting device 4, and the transport trajectory of the auxiliary feed chain 9 is moved upward. . Thereby, first, the supply adjusting device 4
As a result, the handling depth is adjusted in the appropriate direction, and when the short culm is taken over from the supply adjusting device 4 side, the conveying action of the auxiliary feed chain 9 acting on the short culm becomes strong, and the supply adjusting device 4 The feed chain from the side to the two feed chains 6 and 9 is carried out smoothly, and the occurrence of spilling of the culm is reduced, and the spike side of the cereal culm is delayed and supplied to the handling room with the leading side in the leading position. And the decrease in threshing efficiency is reduced.

[0008]

As described above, according to the first aspect of the present invention, both the feed chains 6 and 6 are arranged from the cutting pretreatment device 3 side.
9 can be carried out smoothly and spilling of culm is less likely to occur, and the feeding posture of cereal culm to the handling room can be optimized to improve threshing efficiency.

According to the second aspect of the present invention, in addition to optimizing the handling depth by the supply adjusting device 4, the transfer from the supply adjusting device 4 to the feed chains 6, 9 is performed smoothly. The occurrence of stalk spilling is reduced, and the feeding posture of the grain culm to the handling room can be optimized to improve threshing efficiency.

[0010]

Embodiments of the present invention will be described. The traveling vehicle body 2 is configured by winding a crawler 10 around a driving sprocket 11 and a plurality of idler wheels 12. The threshing apparatus 1 is composed of a handling room 7 having a feed chain 6 along a handling opening and having a handling cylinder 13 mounted on the shaft, and a sorting room disposed below the handling room 7, and is provided on the traveling vehicle body 2. To be mounted on.

The auxiliary feed chain 9 is provided along the inside of the start end of the feed chain 6, and the start end of the transmission sprocket 14 is transmitted from the feed chain 6.
And the end portion is provided so as to extend near the supply port 8 of the handling room 7, and the cereal stem inherited from the feed control device 4 described later is fed to the handling room 7 in cooperation with the feed chain 6 or alone. It is configured to supply. As shown in FIGS. 1 and 2, the feed chain 9 may have a configuration in which the starting end 9 P is located behind the starting end 6 P of the feed chain 6 in the grain culm conveying direction.

The structure of the auxiliary feed chain 9 will now be described in detail. The transmission sprocket 14 is supported on the feed chain rail 40 side, and the floating roller is supported by a predetermined distance behind the transmission sprocket. Then, the auxiliary feed chain 9 is turned around. Further, a fan-shaped vertical movement guide rail 42 is supported coaxially with the transmission sprocket 14 so as to be vertically rotatable, and a toothed portion 43 formed on the circular arc portion of the vertical movement guide rail 42 is supported. The gear 44 of the auxiliary feed chain position changing motor F (auxiliary feed chain position changing means F) is engaged. Thus, when the auxiliary feed chain position changing motor F is operated and the vertical guide rail 42 is rotated upward, the auxiliary feed chain 9 slidably guided by the vertical guide rail 42. The upper part of the ticket turn (conveyance trajectory) bulges upward, and the conveyance trajectory moves upward.

As another structure of the auxiliary feed chain 9, the transmission sprocket 14 and the floating roller 41 are supported and integrated at the front and rear ends of a support frame 45, and the support frame 45 is integrated. The transmission sprocket 14 may be configured to be vertically rotatable about the axis. The support frame 45 is vertically rotated via the rod 46 by the operation of the auxiliary feed chain position changing motor F (auxiliary feed chain position changing means F). Thus, when the support frame 45 is rotated upward, the entire auxiliary feed chain 9 supported by the support frame 45 is rotated so that the rear portion thereof moves upward, and the transport trajectory moves upward. .

By moving the transport trajectory of the auxiliary feed chain 9 upward in this way, when the short culm is taken over from the pre-cutting device 3, the conveying action acting on the short culm becomes strong, and the pre-cutting process is performed. From the device 3 side, both feed chains 6, 9
In addition, it is less likely that culm spillage occurs due to smooth transfer to the culm, and that the spike side of the cereal culm is delayed and supplied to the handling room 7 with the stock side leading, and the handling room is reduced. 7 and the threshing efficiency can be improved.

The auxiliary feed chain position change mode
The terminal F may be arbitrarily operable by the manual switch 47. Next, as shown in FIG. 3, the mowing pre-processing device 3 pivotally attaches the rear portion of the mowing frame 16 to a support base 15 at the front portion of the traveling vehicle body 2 so as to be vertically rotatable. The harvesting device 17 and each grain culm transport device to be described later are mounted on the drum 16. That is, the cutting pretreatment device 3 includes a weeding rod 18, a grain stem raising device 19 having a raising lug 19 a, and the cutting device 1.
7. The scraping transfer device 20, the front transfer device 21, the handling depth adjusting device 22, and the supply adjusting device 4 are arranged so as to be able to successively transfer the grain culm and are attached to the cutting frame 16. The scraping transport device 20 includes a lower scraping wheel 20a and an upper scraping endless belt 20b. Front transfer device 21
Consists of a stock transfer chain 21a and a spike transfer lug 21b, with the start end thereof facing the start end of the scraping transfer device 20 so as to be able to be inherited, and the multi-row harvested culm is transferred upward and rearward and terminated. It is configured to join at the part. Ear transport lug 21b
Is inclined from the right side of the front end toward the starting end of the feed chain 6 in the traveling direction.

As shown in FIGS. 3 and 4, the handling depth adjusting device 22 is composed of a transport chain and a holding rod, and is provided with a start end facing the end of the front transfer device 21 and a rear end. The terminal part is extended upward and faces the start part of the supply adjusting device 4. The handling depth adjusting device 22 is configured so that its starting end is pivotally connected to the cutting frame 16 and its end side swings up and down along the culm direction of the transported culm. Threshing depth control motor - motor -M ₂ is equipped in the vicinity of the threshing depth adjusting device 22,
It is configured to be linked to the handling depth adjusting device 22 via the connecting rod 23 and driven based on an operation signal from the controller 5 to be described later to control the handling depth.

Next, as shown in FIG. 2, the supply adjusting device 4 is provided so as to clamp and transport the grain culm by the supply chain 24 and the holding rod 25, and from the end of the handling depth adjusting device 22. Use the inherited grain culm as an auxiliary feed chain 9
The supply is adjusted by passing over the start end of the chain 6). More specifically, the supply adjusting device 4 includes:
As shown in FIG. 2, the driving sprocket 2 is mounted on the upper side of a transmission box 26 extending from the base of the cutting frame 16 to the auxiliary feed chain 9 (and the feed chain 6).
7, a rolling wheel 29 supported on a movable chain rail 28 for guiding the transport side of the supply chain 24 from the inner surface, and a tension roller 30 located on the front side thereof.
Is wound.

The movable chain rail 28 is rotatably supported at the front of a support arm 31 projecting obliquely forward from the transmission box 26, and the wheel 29 at the tip is provided with an auxiliary wheel.
It is configured to be able to move far and near with respect to the start end of the chain 9. Further, the tension roller 30 is mounted on a tension arm 33 mounted on a fixed machine frame 32 fixed to an intermediate portion of the support arm 31, and is provided outside (the chain 24 is stretched) by a tension spring 34. Direction).

The supply control motor M ₁ (actuator M ₁ ) has one side fixed to the cutting frame 16 side below the supply chain 24 and the other side fixed to the fixing machine frame 32. To the movable chain rail via the rod 35
And is driven based on an operation signal from the controller 5 to perform supply adjustment control. Also,
As shown in FIG. 2, the clamping rod 25 is tensioned by two tension springs 36a and 36b so as to clamp the transported grain culm with the grain culm transport surface of the supply chain 24 where the supply is adjusted. Provided.

The pre-cutting device 3 configured as described above
Can be adjusted up and down by a cutting elevating cylinder 37, and as shown in FIGS. 7 and 8, can be adjusted between a normal working position at a lower part and a high cutting position at a higher part. Next, each detecting means and the controller 5 will be described mainly with reference to FIGS.

First, the position detecting sensor S ₂ is a potentiometer, and detects the rotation angle of the cutting frame 16 so that the height position of the cutting pre-processing device 3 can be measured. Provided at the base of the system 16. Front grain sensor S _3-
And a rear grain culm sensor S ₃ -are provided at a low position on the back side of the grain culm raising device 19 and at a position below the cover of the spike transport lug 21b, respectively, at the beginning and end of the transport path. It is configured to detect the presence or absence of grain culm.

The culm length detecting sensor S ₁ (culm length detecting means) is provided at a relatively high position on the back side of the grain culm raising device 19 so as to detect the culm length of the transported grain culm. The tip sensor S ₄ and the stock sensor S ₅ are connected to the tip transport lug 2.
1b is provided so as to hang down from the connecting machine frame 39 located above the cover to the transport path of the grain stalk to detect the grain stalk length being transported.

Next, the controller 5 (which also serves as the linking means S) connects the sensors to the input side and inputs the detection information, and inputs the information set and stored in advance and the input information from each sensor. Based on each motor connected to the output side
Depth control while controlling the operation of M ₁ , M ₂ and F,
In addition to the high mowing control, the position of the auxiliary feed chain 9 is adjusted.

That is, the controller 5 includes, on the input side, a culm length detection sensor S ₁ , a position detection sensor S ₂ , a front grain culm sensor S ₃ − and a rear grain culm sensor S ₃ −, a head sensor S ₄ and a stock origin. Although not shown, a sensor S ₅ is connected to a cutting clutch sensor S ₆ , a threshing clutch sensor S ₇ , and a vehicle speed sensor S ₈ . Then, controller - La 5, supply regulation to the output side motor - motor -M _1, threshing depth control motor - motor -M _2, auxiliary Fi - Dochen repositioning mode - connecting the data F.

The handling depth control motor M ₂ is controlled based on the detection information of the culm length detecting sensor S ₁ , the head sensor S ₄ and the stock sensor S ₅ , and basically, the grain culm ear portion New position the tip of the passes between the tip sensor S ₄ and strain based sensors S ₅ - Toraruzo - a determined configuration and threshing depth position of the perfect down. Then, the auxiliary feed chain position change mode
Data F is supplied adjusted mode - when data M ₁ is actuated, controller - La 5 via a (cooperative means S), are driven in conjunction with each other.

Next, the operation will be described. First,
Start the engine and operate the mowing clutch and threshing clutch to transmit the rotating parts of the fuselage.
When the controller 5 is operated to move forward, the controller 5 outputs the cutting clutch sensor S ₆ , the threshing clutch sensor S ₇ , and the vehicle speed sensor S
_A work start signal is input from ₈ to start up, and the control operation is started.

When the combine starts harvesting and threshing work in this way, the culm in the field is subjected to weeding by the weeding rod 18 and is caused by the cereal stem raising device 19, and the root of the cultivation is controlled by the reaper 17. Cut and scraped wheel 2
In response to the action of the endless belt 20a and the endless band 20b, it is squeezed, passed on to the front conveying device 21, and conveyed to the upper rear.
The multi-row culm is conveyed by the left and right front conveying devices 21 and merges at the rear, and is successively transferred from the handling depth adjusting device 22 to the supply adjusting device 4 in a continuous state. The feed chain 9 reaches the starting end and is supplied to the threshing apparatus 1.

The transported grain culm supplied to the threshing device 1 has its roots clamped and transported by a feed chain 6 and has an auxiliary feed at the tip side.
While being transported by the chain 9, the tip portion is
In the process of being inserted into and passing through, the threshing is performed by the rotating handling cylinder 13. Then, the thresh-processed product reaches the lower sorting chamber and is subjected to sorting by the action of the sorting wind and the swing sorting device, and the harvested grains are temporarily stored in a Glen tank.

Now, as described above, when the mowing and threshing operation is being performed continuously, the pre-cutting device 3 is held at the height of the lower normal working position, and the position is detected by the position detecting sensor. from S ₂ control - are input of La 5. Then, the front grain culm sensor S ₃ − and the rear grain culm sensor S ₃ −
, The transported culm is detected and input.
Further, culm length detection sensor S ₁ is entered by detecting the grain稈丈.

Then, the handling depth adjusting device 22 transmits the detection information from the tip sensor S ₄ and the stock sensor S ₅ to the controller 5.
Is input to, on the basis thereof control - threshing depth control mode by a control signal outputted from La 5 - motor -M ₂ is controlled actuation, is adjusted automatically threshing depth via the communication matter 23 . In this case, controller - La 5 determines that the most suitable threshing depth positions positions passing between the tip position pike sensor S ₄ and strain based sensors S ₅ of the transport culms,扱深in that position Adjustment control is performed so that the adjustment position of the adjustment device 22 is adjusted.

Next, when the traveling vehicle body 2 reaches the ridge of the field and moves to cutting the headland, the cutting body 18 is cut to prevent the tip of the weeding rod 18 from colliding with the ridge protruding at the end of the field. The raising / lowering cylinder 37 is extended, and the pre-cutting device 3 is raised as shown in FIG. Hereinafter, the high mowing control will be described with reference to the flowchart of FIG.

First, with the cutting clutch sensor S ₆ , the threshing clutch sensor S ₇ and the vehicle speed sensor S ₈ each being ON (during operation), the cutting pre-processing device 3 is raised to a high cutting position and the headland is cut. Move on to Thus starting the high mowing in the, controller - La 5, when it detects information is inputted from the respective sensors, and inputs the detection information by detecting the culms of culm length detection sensor S ₁ is been fed When the non-detection information is input, it is determined that the grain stalk length is shorter than the reference value (60 cm) and the control is performed only by the handling depth adjusting device 22. Control by both the adjusting device 22 and the supply adjusting device 4 is performed simultaneously.

Firstly, controller - La 5, the detection information is input from the culm length detection sensor S _1, the output 1.5sec threshing depth control mode -扱深controls the motor -M ₂ to deep threshing side The work is performed by adjusting the adjustment device 22 to the side where it can handle about 15 cm deep.
Complete cutting high by the control operation described above, the rear culms sensor S ₃ - is completed by detecting that there are no more culms. Thereafter, the handling depth adjusting device 22 returns to the shallow handling side for about 12 cm with a predetermined time delay due to the operation of the off delay, and the
It becomes.

On the other hand, grain稈丈is extremely short, the non-detection information in a state in which the top does not reach the culm length detection sensor S ₁ control -
When input to the controller 5, the controller 5 outputs a signal for adjusting the handling depth adjusting device 22 and the supply adjusting device 4 to the deepest handling position and a signal for moving the transport trajectory of the auxiliary feed chain 9 upward. each threshing depth control motor - motor -M ₂ and supply control motor - motor -M ₁ and the auxiliary Fi - Dochen repositioning mode - and outputs the data F. Therefore, the handling depth adjusting device 22 and the feed adjusting device 4
Means that an extremely short cereal stem controlled to the deepest handling position is supplied to the threshing apparatus 1.

The supply control device 4 controlled and controlled as described above supplies the extremely short cereal stem inherited from the end of the handling depth control device 22 to the auxiliary feed chain 9 and the feed chain 6. At this time, the short grain culm whose root does not reach the clamping position of the feed chain 6 is conveyed by the auxiliary feed chain 9 whose conveying trajectory has moved upward, and all the culms are directly introduced into the handling room from the supply side. become. In this case, the cereal stalks whose roots have reached the position where the feed chain 6 is clamped slightly are conveyed by the auxiliary feed chain 9 on the tip side and conveyed with the root side clamped by the feed chain 6. However, in many cases, when the tip side reaches the handling cylinder 13 that is rotating, the rotating force causes the tip to be drawn into the handling chamber 7 and the entire culm is put into the state. In the case of extremely short culms, the cereal culm is a small amount, but only the culm which is securely clamped by the feed chain 6 is subjected to a threshing process in the clamped state and reaches the straw part.

As described above, since the supply adjusting device 4 is appropriately controlled based on the operation signal of the controller 5, it can cope with an extremely short grain culm, and can also cut the headland. It can be done by combine. When one step of the cutting and threshing operation is completed as described above, the controller 5 determines that the processing is completed by detecting that the rear culm sensor S _3- has run out of cereal culm, and determines that the corn culm is terminated. Originally, the handling depth adjusting device 22 and the supply adjusting device 4 are returned to the shallow handling position. In this case, the handling depth adjusting device 22
Is basically to return to the handling position before the adjustment, but since the re-start generally starts from the slightly deep handling position, it is returned to the deep side. Further, the supply adjusting device 4 is returned to the normal standby position, and accordingly, the auxiliary feed chain 9 is also moved down to return to the original position.

The return timing and the return position of the handling depth adjusting device 22 and the supply adjusting device 4 when returning to the original state after the control operation are set in advance and input to the controller 5 as reference information. And The operation of the auxiliary feed chain position changing motor F is replaced with the operation of the supply adjusting device 4,
The operation of the handling depth adjusting device 22 may be linked.

As another control structure, a threshing clutch
Threshing clutch sensor S ₇Turns ON
With the latch turned off, the reaping clutch sensor S₆Turns off
In this state, the pre-cutting device 3 is set to the low position and the position detection
Sensor S_TwoDetects that the vehicle body 2 is less than the set value, and
The vehicle speed sensor S₈Not very fast
When the stoppage is detected, the supply adjustment device 4 is
The position may be adjusted to operate. like this
With this configuration, the supply chain 2
4 retracts to the back of the fuselage and the space in front of the supply port 8 is wide
It becomes easy to supply the grain stalks in an appropriate posture.

It should be noted that the numerical values described in the above description are merely examples, and do not limit the scope of rights.

[Brief description of the drawings]

FIG. 1 is a plan view according to an embodiment of the present invention.

FIG. 2 is a plan view according to the embodiment of the present invention.

FIG. 3 is a side view according to the embodiment of the present invention.

FIG. 4 is a plan view in the embodiment of the present invention.

FIG. 5 is a side view according to the embodiment of the present invention.

FIG. 6 is a side view according to the embodiment of the present invention.

FIG. 7 is a side view for explaining the operation in the embodiment of the present invention.

FIG. 8 is a side view for explaining the operation in the embodiment of the present invention.

FIG. 9 is a side view according to the embodiment of the present invention.

FIG. 10 is a block circuit diagram according to an embodiment of the present invention.

FIG. 11 is a flowchart in the embodiment of the present invention.

FIG. 12 is a side view of an auxiliary feed chain unit according to the embodiment of the present invention.

FIG. 13 is a side view of an auxiliary feed chain unit according to the embodiment of the present invention.

FIG. 14 is a partial plan view in the embodiment of the present invention.

FIG. 15 is a partial flowchart in the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 threshing device 3 cutting pretreatment device 4 supply adjusting device 6 feed chain 9 auxiliary feed chain F auxiliary feed chain position changing means (auxiliary feed chain position changing motor) S connecting means

Claims (2)

[Claims] 1. A feed chain 6 which takes over a harvested culm from a pre-cutting device 3 and supplies it to a threshing device 1, and an auxiliary feed chain 9 juxtaposed inside the starting end of the feed chain 6. An auxiliary feed chain position changing means F for changing the conveying locus of the auxiliary feed chain 9 up and down is provided. 2. A feed adjusting device 4 for adjusting the supply depth of the cut culm from the pre-cutting device 3 to the threshing device 1, and a cut-off culm taken from the feed adjusting device 4 and supplied to the threshing device 1. Feed chain 6, an auxiliary feed chain 9 juxtaposed inside the start end of the feed chain 6, and an auxiliary feed chain position changing means F for changing the transport trajectory of the auxiliary feed chain 9 up and down. And a linking means S for operating an auxiliary feed chain position changing means F in connection with the operation of the supply adjusting device 4.