JP2001275459A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute a combine harvester capable of removing contaminants by simple operation even when stay or clogging of these contaminants occurs at the rear of a pre-treating part for reaping. SOLUTION: This combine harvester is equipped with a releasing means supporting the pre-treating part so as to enable free changeover of posture around the vertical axis center and constituting the pre-treating part so as to be able to open it for a traveling machine body by changeover of the posture and reducing clamping force by displacing a chain guide 54 arranged on the anti-conveying face side of a conveying chain 53 to the side separating from a clamping rail 55 by operation of a lever 60 enabling manual operation in the open state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raising device for raising a planted grain culm, a cutting device for cutting a root of the planted grain culm,
Regarding a combine in which a cutting pre-processing unit including a pinching and conveying device that pinches and conveys the harvested grain culm cut by the cutting device is arranged at a position parallel to the operating unit at a front position of the traveling machine body. The present invention relates to a technique for improving maintainability of a pre-cutting unit.

[0002]

2. Description of the Related Art In a conventional combine, a pre-cutting process is performed by lowering a pre-cutting unit of a traveling machine until it comes into contact with the ground, performing a predetermined separating operation, and then moving the traveling machine backward. There is a structure that can be separated in the form that the part is left on the ground, and in this combine, the cutting pre-processing unit and the traveling body can be largely separated, so that the work in the connected state like the rear side of the cutting pre-processing unit This makes it easier for the user to perform maintenance on parts that are difficult to work.

[0003]

In a conventional combine, the harvested culm from which the stock is cut is transported in a state of being clamped by a clamping and conveying device. The cereal stems may fall off during the transportation by the holding and transporting device, causing stagnation or clogging in the transportation route. In the event of this type of inconvenience, stagnation and clogging can be manually removed in relatively exposed areas.However, if stagnation or clogging occurs behind the pre-cutting unit, Is difficult. Also, as described above, in a combine in which the pre-cutting processing unit can be separated from the traveling body, it is possible to satisfactorily remove stagnation and clogging by separating the pre-cutting processing unit from the traveling body. When the part is separated from the traveling body, a relatively large area such as a space for grounding the pre-cutting unit and a space for moving the traveling body backward is required, and when restoring from the separated state to the connected state, There is room for improvement in that the operation is complicated and takes too much time, such as the necessity of performing a connection operation after the traveling body is advanced.

[0004] An object of the present invention is to rationally construct a combine that can remove stagnation and clogging by a simple operation even if stagnation or clogging of foreign matter occurs in the rear part of the pre-cutting processing unit.

[0005]

A first feature (claim 1) of the present invention is a raising device for raising a planted grain culm, a cutting device for cutting a root of the planted grain culm, A harvesting pretreatment unit comprising a harvesting culm that has been harvested by the harvesting device and a nipping and transporting device for nipping and transporting the harvested culm. By swinging the processing unit around the axis in the vertical position, the front end of the processing unit can be switched between a working position in which the front end is directed forward and an open position in which the front end is directed toward the counter-driving unit. In addition, there is provided a release means for releasing or reducing the holding force of the holding mechanism constituting the holding / conveying device. The operation and effect thereof are as follows.

A second feature of the present invention (claim 2) is that, in claim 1, the axial center in the vertical posture is disposed near an end on the side of the non-driving portion, and its operation, And the effect is as follows.

A third feature of the present invention (claim 3) is that, in claim 1 or 2, after the holding and conveying device joins a plurality of conveying systems for holding and transporting the cut culm at the junction. In addition, it is configured to supply to the threshing device provided in the traveling machine body, and the release means is disposed at the merging portion. The operation and effect are as follows.

A fourth feature of the present invention (claim 4) is that in any one of claims 1 to 3,
A transport chain, a clamping rail, and a chain guide disposed on a side opposite to the clamping rail of the transport chain, and the releasing means is configured to move the chain guide on the side opposite to the clamping rail by operation of a manually operated lever. The operation and the effect are as follows.

[Action]

According to the first feature, for example, even if a jam occurs in the nipping and conveying device located at the rear side of the pre-cutting unit, the pre-cutting unit is set in the open position around the vertical axis. By switching, the operator can not only easily enter the rear part of the pre-cutting processing unit to perform the work for eliminating the clogging, but also release or reduce the clamping force of the clamping mechanism of the clamping and conveying device by the release means. This makes it easier to remove pinched stalks and eliminate stagnation and clogging.At this time, it is not necessary to perform complicated and labor-intensive operations to separate the pre-cutting unit as in the conventional technology. It is only necessary to change the attitude of the processing unit.

According to the second feature, since the shaft center in the vertical position is disposed at the end of the non-driving unit, when the cutting pre-processing unit is switched to the open position, it is close to the driving unit. It is possible to create a good working environment by opening a large space.

According to the third feature, since the release means is disposed at the junction where the stagnation and clogging are relatively easy to occur, the clogging at the junction can be easily removed.

According to the fourth feature, by operating the lever, the chain guide is displaced in a direction to reduce the tension of the chain, and as a result, the gripping force of the transport chain in a relatively wide transport area is released or reduced. And stagnation and clogging can be easily removed.

[Effects of the Invention] Accordingly, a combine that can remove stagnation and clogging by a simple operation even if stagnation or clogging of contaminants occurs in the rear part of the pre-cutting processing unit is rationally configured (claim) Item 1). In addition, a wide working area can be ensured by only setting the axis center position to enable work in a favorable environment (Claim 2), and stagnation and clogging at the junction where the stagnation and clogging are relatively likely to occur. (Claim 3), and stagnation and clogging in a wide area sandwiched by the holding rails can be easily eliminated (claim 4).

[0015]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the driving unit 2 and the mowing pre-processing unit 3 are arranged in a parallel state at a front position of a traveling body A configured to be able to travel freely by a pair of left and right crawler traveling devices 1, The traveling machine A is provided with a threshing device 4 to which the harvested culm from the mowing pretreatment unit 3 is supplied and a Glen tank 5 for storing the grains from the threshing device 4.

As shown in FIG. 1 to FIG.
The raising device 6 for raising the planted grain culm, the clipper-type cutting device 7 for cutting the root of the planted grain culm, and the cut grain culm cut by the cutting device 7 are fed to the feed chain 10 of the threshing device 4. It is provided with a transport means for supplying. In addition, the conveying means is provided with a plurality of conveying belts 51 with projections that lock the root of the planted grain culm and feed it backward, and a plurality of scraping rotators 52 having a large number of projections on the outer periphery in a lateral direction. Yes, a main transport unit that transports the harvested grain culm from the pair of right-handed rotators 52,
And a sub-transporting section that conveys the harvested grain culm from the pair of left-side scraping rotating bodies 52 and joins the main transporting section, wherein the main transporting section is a main clamping section for clamping and transporting the root of the harvested grain culm. Transfer device E
And an intermediate pinching and conveying apparatus F, and an auxiliary pinching and conveying apparatus G, and a tip end conveying apparatus H that locks and conveys the tip side of the harvested grain culm along these pinching and conveying apparatuses E, F, and G. The sub-transporting section is provided with a sub-nipping transport device J for pinching and transporting the root of the harvested grain culm, and an ear tip transport device for engaging and transporting the tip side of the harvested grain culm along the sub-pinching transport device. K is provided.

The main nipping and conveying apparatus E will be described as an example. In each of the nipping and conveying apparatuses, a conveying chain 53, a chain guide 54 arranged on the side opposite to the conveying surface of the conveying chain 53, and a conveying surface of the conveying chain 53 Rail 55 disposed on the side of the transport chain 53
And a biasing mechanism 56 for biasing the spring toward the side. And, in this combine, the main holding and conveying device E
And a structure for easily eliminating the stagnation and clogging that has occurred. That is, as shown in FIGS.
A plate 58 is provided so as to be swingable around the axis of a sprocket 57 for driving the transport chain 53.
And a lever 60 for swinging the plate 58 around the axis. A pin 61 erected on the frame side is inserted into a long hole 54a on the tip side of the chain guide 54, and the rear end of the chain guide 54 is connected to the plate 58 via a pin 62. Further, a tension wheel 65 is provided at a swing end of an arm member 64 that swings around the axis of the intermediate wheel body 63 disposed on the opposite side to the transport surface, and a member 66 that swings integrally with the arm member 64 is provided. A tension spring 68 is provided between the protruding piece 67 formed on the plate 58.

When the stagnation or clogging is eliminated by this structure, the idle wheel 59 is moved counterclockwise from the position shown in FIG.
Chain guide 5 while being displaced to the side away from
4 is displaced in the direction away from the holding rail 55 while moving backward, and further, in conjunction with this operation, the urging force of the tension spring 68 is reduced, and the tension of the transport chain 53 is reduced. As a result, A gap is formed between the holding rail 55 and the transport chain 53, so that stagnation and clogging can be easily eliminated. As described above, the operation of the lever 60 causes the nipping rail 55
The release means B is constituted by a mechanism for reducing the holding force of the holding rail 55. The releasing means B may not only reduce the holding force of the holding rail 55 but also completely release the holding force.

The pre-cutting section 3 is supported by a pipe-shaped support frame 12 in a front-rear direction, and the front end of the pre-cutting section 3 is provided with power from a transmission shaft built in the supporting frame 12. It is driven by.
As shown in FIG. 7, the horizontal frame 13 at the front end of the traveling body A
A hydraulic pipe 14 is provided, and a round pipe-shaped column 15 is rotatably supported around a vertical axis P1 with respect to a bracket 14a fixed to the upper surface of the hydraulic oil tank 14 and the horizontal frame 13. As shown in FIG. 2, the support column 15 is disposed at an end position on the side opposite to the driving section, and the support column 15 is located near the front end of the feed chain 10. The outer end of a round pipe-shaped support case 16 is rotatably fitted and supported around a horizontal axis P2 with respect to a boss portion 15a integrally formed laterally on the upper portion of the column 15. The support frame 12 is connected to an inner end of the case 16.

As shown in FIGS. 1, 8, and 9, a single-acting hydraulic cylinder 18 is disposed below the hydraulic oil tank 14, and a piston rod 18a of the hydraulic cylinder 18 is provided.
And a channel-like connecting portion 19 fixed to the lower surface of the support frame 12 are connected by a connecting pin 27, and the driving force of the hydraulic cylinder 18 causes the support frame 12 to be integrated with the support case 16 around the horizontal axis P2. Is pivoted to drive the pre-cutting unit 3 up and down. A grip portion 27a is formed on the connection pin 27, and a through-hole is provided on the side of the grip portion 27a in a posture orthogonal to the axis, and a stopper fixed to the side of the through-hole and the connection portion 19 is provided. Beta type retaining pin 28 is inserted into an opening formed in plate 29
Is attached to prevent the connection pin 27 from coming off.

As shown in FIGS. 7, 10 to 12 (a) and (b), the upper surface of the support base 17 for supporting the inner end of the support case 16 has the radius of the inner end of the support case 16 in a side view. The support 17 has a semicircular concave shape having a radius equal to the radius of the inner end of the support case 16 in a side view. The molded holding member 20 is swingably provided around the horizontal axis P3 on the front side. A fixing portion 17a having a concave portion into which the swinging end of the holding member 20 fits is formed on the rear surface side of the support base 17, and is slidably provided in an opening 17b formed in the fixing portion 17a. A connecting pin 21 is provided.
Is fixed to the horizontal axis P4
There is provided a tension spring 23 that swingably supports the periphery and biases the fixed lever 22 on the side where the connecting pin 21 is inserted. An opening 20a through which the connecting pin 21 can be inserted is formed at an end of the holding member 20, and the holding member 20 is set to a closed posture with the support case 16 placed on the upper surface of the support base 17, The support case 16 can be rotatably supported around the horizontal axis P3 by maintaining the closed posture with the connecting pin 21.

This combine has a mechanism for holding the pre-cutting unit 3 in a state in which it has been raised to a predetermined height (a height slightly lower than the rising limit). That is, FIGS.
As shown in FIGS. 13 (a) and 13 (b) and FIGS. 13 (a) and 13 (b), the horizontal plate 15b and the pair of vertical plates 1
5c is integrally formed, and a stopper pin 24 in a posture parallel to the horizontal axis P2 is slidably supported by the pair of vertical plate portions 15c. The support case 16 has a vertical plate portion 16 which is in sliding contact with the vertical plate portion 15c on the inner side of the column 15.
a is integrally formed, and a vertical plate portion 16a of the support case 16 is formed.
Has a long hole 16b. One end of the helical spring 26 is engaged and held with a pin provided on the stopper pin 24, and a loop portion 26a formed in the middle of the other end of the helical spring 26 is erected on the horizontal plate portion 15b. One of the pair of support pins 25a, 25b is configured to be able to be selected and held in an inserted state, and the other end of the helical spring 26 is provided with an operating portion 26 on the other end side of the helical spring 26.
b is formed.

As shown in FIG. 13A, the loop 26a of the helical spring 26 is connected to the outer support pin 25a.
, The urging force of the helical spring 26 does not act on the stopper pin 24, the stopper pin 24 does not protrude from the vertical plate portion 15c, and the cutting pre-processing unit 3 is moved to near the upper limit. The stopper pin 24 does not engage with the elongated hole 16b on the side of the support case 16 even when driven upward. Conversely, when the loop portion 26a of the helical spring 26 is held on the inner side of the support pin 26a as shown in FIG. Is applied, and the stopper pin 24 is about to protrude from the vertical plate portion 15c. Therefore, when the cutting pre-processing unit 3 is driven to move up near the rising limit, the stopper pin 24 becomes an elongated hole on the support case 16 side. 16b to prevent the lowering operation.

As shown in FIGS. 7 and 10, an input pulley 31 is provided at the inner end of the support case 16 and is provided in the support case to transmit power to a transmission shaft.
A transmission belt 30 is wound around the transmission belt and an output pulley (not shown) of the transmission case.
A mowing clutch is provided with a tension pulley 41a at the swinging end of a tension arm 41 that is swingably supported around a horizontal axis P6 so as to switch between transmission and interruption of power by adjusting the tension of zero. .

In this combine, as described above, by switching the posture of the pre-cutting unit 3 about the longitudinal axis P1, the front end of the pre-cutting unit 3 is moved forward as shown in FIG. The front end of the cutting pre-processing unit 4 is shown in FIG.
As shown in Fig. 7, the switch is configured to be freely switchable to an open position toward the counter-operation unit side, and when the stagnation or clogging of the transport means is removed or maintenance is performed, the cutting pre-processing unit 3 is set to the open position. It has become.

That is, when the pre-cutting unit 3 is switched from the working position to the open position, first, the helical spring 26
The operation of holding the loop portion 26a of the support member 15 on the support pin 25b outside the horizontal plate portion 15b of the column 15 is performed. Thereafter, the extension operation of the hydraulic cylinder 18 drives the mowing pre-processing portion 3 upward to drive the helical spring 26. As shown in FIG. 13 (b), the stopper pin 24 is inserted into the long hole 16b of the vertical plate portion 16a of the support case 16 by the urging force to set the state in which the lowering of the pre-cutting unit 3 is prevented. Next, the retaining pin 28 shown in FIGS. 8 and 9 is removed, and the connecting pin 2 is
7 and the piston rod 18 of the hydraulic cylinder 18
a and the connecting portion 19 on the lower surface of the support frame 12 are separated from each other.
And remove it from the tension pulley 41a. Thereafter, the fixing lever 22 is operated to separate the connecting pin 21 from the opening 20a of the holding member 20, and the holding member 20 is opened around the horizontal axis P3, as shown in FIG. When this state is reached, the inner end of the support case 16 is in a free state, and the entire pre-cutting part B is moved along the vertical axis P of the support 15.
1 to turn the front end of the pre-cutting unit 3 away from the operating unit 2. By operating in this manner, the front end of the pre-cutting processing unit 3 faces the counter-driving unit, and a space where an operator can enter between the rear end of the pre-cutting processing unit 3 and the traveling vehicle body is formed. It is formed.

In order to remove the jam of the main holding and conveying device E in this state, the chain 60 is simultaneously displaced to the side separated from the holding rail 55 by operating the lever 60 as shown in FIG. The guide 54 is displaced in the direction away from the holding rail 55 while moving backward, and further, in conjunction with this operation, the urging force of the tension spring 68 is reduced, and the tension of the transport chain 53 is reduced. As a result, , Clamping rail 55 and transport chain 53
And a gap is formed between them so that stagnation and clogging can be easily eliminated. Thereafter, when restoring the pre-cutting unit 3 to the working posture, an operation reverse to the above-described operation is performed.

[Brief description of the drawings]

FIG. 1 is an overall side view of a combine.

FIG. 2 is an overall plan view of the combine.

FIG. 3 is a schematic diagram of a transport system of a pre-cutting unit.

FIG. 4 is a plan view of a release unit.

FIG. 5 is a plan view of a release unit in a release state.

FIG. 6 is a longitudinal sectional side view of a release unit.

FIG. 7 is a front view showing a support structure of the support case.

FIG. 8 is a side view showing a connection structure of a piston rod.

FIG. 9 is a bottom view showing the connection structure of the piston rod.

FIG. 10 is a side view of a state in which the holding member is set in a closed posture.

FIG. 11 is a side view showing a state in which the holding member is set in an open position.

FIG. 12 is a side view showing an operation state of two fixed levers.

FIG. 13 is a plan view showing two states in which a spring biasing force acts on a stopper pin.

FIG. 14 is a side view showing two states of the positional relationship between the stopper pin and the long hole.

FIG. 15 is a plan view of a combine in which a pre-cutting unit is set to an open posture.

[Explanation of symbols]

 2 Operating part 3 Cutting pre-processing part 4 Threshing device 6 Raising device 7 Cutting device 53 Transport chain 54 Chain guide 55 Nipping rail 60 Lever A Traveling body B Release means P1 Shaft core

Claims (4)

[Claims] 1. A raising device for raising a planted cereal culm, a cutting device for cutting a root of the planted cereal culm, and a clamping and conveying device for clamping and conveying the harvested cereal culm cut by the cutting device. A combine having a cutting pre-processing unit provided at a position parallel to the driving unit at a front position of the traveling body, wherein the cutting pre-processing unit is swung around an axis in a vertical posture, The front end is forwardly switched to a working posture, and the front end is switched to an open posture, which is directed toward the counter-driving unit, and is supported by the traveling machine body, and the clamping force of a clamping mechanism constituting the clamping and conveying device is reduced. A combine provided with a releasing means for releasing or reducing. 2. The combine according to claim 1, wherein the shaft center in the vertical posture is disposed near an end on the side opposite to the driving section. 3. After the plurality of transport systems for nipping and transporting the cut culm are joined at the junction,
The combine according to claim 1, wherein the combine is configured to be supplied to a threshing device provided in the traveling body and the release unit is disposed at the junction. 4. A transport chain comprising: a transport chain;
An operation for displacing the chain guide to the opposite side of the holding rail by operation of a manually operated lever, wherein the releasing means comprises a holding rail and a chain guide arranged on the side of the conveying chain opposite to the holding rail. The combine according to any one of claims 1 to 3, wherein the combine has a structure.