JPH0434668Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the structure of a grain culm stock transport device in a pre-harvesting processing unit of a combine harvester. This relates to the structure of the grain culm joining part to the feed chain of the device.

[Conventional technology]

In a combine harvester that threshes rice, etc. planted in a field while reaping it, the stem culm reaping section of the pre-harvesting section installed at the front of the traveling machine is located at an appropriate height relative to the field, and the height of the traveling machine is It is necessary to keep the cutting height constant in the left and right direction, to prevent variations in the cutting height of the stem culm, and to prevent the cutting blade at the bottom of the cutting pre-treatment section from sinking into the soil. The reaping pre-processing section is attached to the traveling machine body so that its posture can be changed, such as by moving up and down and tilting left and right.

Therefore, the terminal end of the grain culm source transport device in the pre-harvesting processing section and the starting end of the feed chain of the threshing device mounted on the traveling machine are not integrally continuous, but due to changes in the posture of the pre-harvesting processing section. Regardless of the situation, the structure is usually such that the grain culms are inherited at appropriate intervals so that the two do not interfere with each other.

On the other hand, the length of the harvested grain culm is sensed in the reaping pre-processing section, and the attitude of the grain culm stock origin conveying device attached to the reaping pre-processing section with respect to the feed chain is varied accordingly, and the The grain culm inheritance depth in the threshing device is changed so that the handling depth in the threshing device is kept approximately constant.

In this case, conventionally, for example,
Publication No. 60-5794, Publication No. 5794 of Utility Model Publication No. 1987-
As described in Publication No. 50218 and Japanese Utility Model Application Publication No. 57-20830, etc., a grain culm guide rod is attached from the terminal end of the grain culm stock transport device, and a feed chain with claws protruding from both the left and right sides of the transport surface is used. It is provided over the starting end of the grain culm to ensure stable inheritance of the grain culm at the inheritance point and to prevent it from falling off or being disturbed.

[Problem that the invention attempts to solve]

However, in each of the above-mentioned prior arts, when the free end side of the grain culm guide rod, which is spring-biased so as to press against the surface of the feed chain conveying surface, is rotatably pivoted so that it can escape from the surface, , the grain culm guide rod is pivoted to the fixed frame of the grain culm stock source conveyance device about a pivot axis extending in a direction perpendicular to the grain culm conveyance direction in the feed chain; Therefore, when the terminal end of the grain culm stock transfer device moves near and far in the width direction of the feed chain due to attitude changes, the grain culm guide rod also changes its width at the middle part of the feed chain in the width direction. It will move along the direction.

In other words, since the grain culm guide rod moves in a direction substantially perpendicular to the conveying direction of grain culms in the feed chain, the claw portions of the claw plates on both left and right sides of the feed chain protruding on both left and right sides, and the intermediate position thereof. The position of the grain culm stock base (in the culm direction of the grain culm) that is held between the grain culm guide rod and the grain culm guide rod changes.

At this time, the grain culm is held between the left and right claws of the feed chain and the grain culm guide rod located in the middle thereof, and the stock base is bent into a V-shape.
When the pressing position of the grain culm guide rod against the feed chain moves in the width direction of the feed chain, the angle of the V-shape changes, and the degree of lifting of the grain culm tip side also changes, changing the posture of the grain culm at the transfer point. There was a problem that the information could change or become disordered.

The present invention aims to solve this problem.

[Means for solving problems]

Therefore, in the present invention, the terminal end of the grain culm stock origin conveying device installed in the reaping pre-processing section attached to the traveling machine body is
By facing the starting end of the feed chain in the threshing device mounted on the traveling machine and moving the grain culm stock source conveying device far and near in the direction of the feed chain,
In a combine configured to be able to adjust the depth of grain inheritance from the terminal end to the starting end of the feed chain, between the terminal end of the grain culm stock origin conveying device and the grain culm conveying surface of the starting end of the feed chain. A grain culm guide rod extending along the grain culm conveying direction of the feed chain is arranged, and the base end side of the grain culm guide rod is connected to an appropriate location at the terminal end of the grain culm stock source conveying device, The feed chain is rotatably supported around the axis of the feed chain via a pivot arranged to extend in the grain culm conveying direction, and the grain culm guide rod has a free end thereof attached to the feed chain. A spring means is provided to press and bias the grain culm conveying surface, and the pivot shaft is further arranged at a position separated from the grain culm conveying surface of the feed chain by an appropriate distance.

[Functions and effects of the invention]

In this configuration, when the terminal end of the grain culm stock transfer device moves near or far with respect to the feed chain, the grain culm guide rod is in a state where its free end side is pressed against the grain culm transport surface in the feed chain by the spring means. , centered on its proximal axis,
Since the grain culm guide rod rotates around the axis, it is necessary to move the grain culm guide rod in the width direction of the feed chain by moving the terminal end of the grain culm stock source conveying device toward and away from the feed chain. As shown in the figure, the number of grain culm guide rods can be significantly reduced compared to the case where the base end of the grain culm guide rod is pivotally attached via a pivot perpendicular to the grain culm conveying direction of the feed chain.

Therefore, according to the present invention, the grain culm guide rod rotatably pivoted to the terminal end of the grain culm stock source conveying device does not move even when it is pressed against the grain culm conveying surface of the feed chain. Since it is possible to reduce movement in the width direction that is substantially perpendicular to the grain culm conveyance direction by the feed chain, the degree of bending and the pinching of the grain culm base that is held between the left and right claw plates and the grain culm guide rod in the feed chain can be reduced. This has the effect that the strength is always constant, the grain culm does not fall off or is disturbed, and the grain culm inheritance to the starting end of the feed chain is stabilized.

〔Example〕

Next, an embodiment of the present invention will be described. Reference numeral 1 designates a combine harvester running body having a pair of left and right running crawlers 2, and the running body 1 includes a threshing device 3.
is mounted, and the handling barrel in the handling chamber of the threshing device 3 is arranged so that its axis line is along the traveling direction of the traveling body 1. Reference numeral 4 denotes a feed chain installed along the threshing device 3, the feed chain 4 is arranged along the left side in the traveling direction of the traveling machine body 1, and the front end of the feed chain 4 protrudes forward from the front plate 3a of the threshing device 3. In addition, the front end is a reaping pre-processing section 5 which will be described later.
It is arranged so as to face the terminal end of the stock transfer device 6 at.

The reaping pre-treatment section 5 is provided via a machine frame 7 that protrudes from the front part of the traveling machine body 1, and a plurality of weeding bodies 8 and then a reaping device 9 are installed at the lower end of a lower frame 7a of the machine frame 7. , a plurality of grain culm lifting devices 10 are provided on the front surface, as well as a raking wheel 11, an ear tip conveying device 12, and a grain culm stock origin conveying device 6, which will be described later.

Reference numeral 14 denotes a support frame that supports the reaping pre-processing section 5 with respect to the traveling machine body 1 so as to be able to freely pitch and roll. pitching arm 15
and a T-shaped or L-shaped rolling arm 16 that supports the pitching arm 15 in a rolling manner.

This rolling arm 16 has the right and left longitudinal sides of the traveling body, and a rotation axis 17 at its base end is along the traveling direction of the traveling body 1.

The rotation shaft 17 is arranged at a position in front of the front plate 3a of the threshing device 3 of the traveling machine body 1, inside the machine body 1 at the starting end of the feed chain 4, and at a position near the bottom of the terminal end of the stock transfer device 6. It is rotatably supported by a rolling rotation bearing section 21 at the upper end of a pair of front and rear columns 20 that stand up from the front frame 19 of the traveling body 1. Therefore, this rolling arm 16 moves up and down with the axis of the rotation shaft 17 as the rolling rotation fulcrum 17a, and each of the rolling rotation bearing parts 21 can be divided into two parts from the flange part 21a. can.

On the other hand, the vicinity of the tip of the rolling arm 16 and the front frame 19 are forward-tilting prevention means that support the rolling arm 16 so that it cannot swing in a lateral direction substantially perpendicular to its longitudinal axis and can be raised and lowered. 22
Connect at.

For example, as shown in FIG. 3, this forward-tilting prevention means 22 consists of a pair of upper and lower links 45 and 46 that can be bent in a dogleg shape when viewed from the front, and the upper ends of the upper link 45 and the lower link 46 are connected to each other. A pin 47 is pivotally connected, and the upper end of the upper link 45 is connected to the rolling arm 16 by the pin 4.
8, and the lower ends of the lower links 46 are each pivotally connected to pins 49 passing through the front frame 19, so that the rolling arms 16 can move up and down around the rolling rotation fulcrum 17a, but before reaping. The structure is such that the traveling body 1 does not bend or twist in the front-rear direction due to the weight of the processing section 5.

Reference numeral 26 denotes a rolling drive means for vertically moving the rolling arm 16 along the left-right direction of the traveling body 1, and in the illustrated embodiment, it is composed of a hydraulic cylinder mounted between the front frame 19 and the arm 18.
Reference numeral 27 denotes pitching drive means for vertically moving the pitching arm 15 along the longitudinal direction of the traveling machine body 1, and is constituted by a hydraulic cylinder mounted between the rolling arm 16 and the pipe-shaped pitching arm 15.

The hydraulic cylinders that are these drive means 26 and 27 are both so-called single-acting types, and the traveling body 1
From the hydraulic pump 29 mounted on the switch valve 30,
31 to allow hydraulic pressure to enter and exit (see Figure 7).

At this time, each of the switching valves 30 and 31 can be switched manually, or by sensing the distance from the field scene using a sensor (not shown) attached to the lower part of the pre-reaping treatment section 5, It may also be controlled to self-correct by sensing its own forward leaning posture or left/right leaning posture.

The rolling arm 16 is provided with a pair of left and right pitching rotation bearings 23 that protrude upward and toward the front of the traveling machine body, and a transmission case 24 to which the base of the pipe-shaped pitching arm 15 is attached is rotatable. to support. As a result, the pitching arm 15 with the reaping pretreatment section 5 attached to its front end can move up and down about the pitching rotation axis 23a, which is the axis of the pitching rotation bearing section 23.

The power transmission mechanism 25 from the power section of the traveling machine body 1 to the reaping pretreatment section 5 is as shown in FIG.
A support shaft portion 34 of the pulley 32 is provided near the rear rolling rotation bearing portion 21 where the pulley 32, which is transmitted by the belt 33 from the winch shaft, supports the rotation shaft 17.
(with a built-in torque limiter) and a transmission shaft portion 35 mounted on the rolling arm 16 are connected via a bendable and expandable joint 36. At this time, the joint 36 and the transmission shaft portion 35 are arranged so as to overlap with each other in the upper part of the distal end portion of the arm 18 in a plan view, so that the length of the joint 36 can be maintained even when the rolling arm 16 is rolling. Transmission can be done without changing too much. A belt 38 is wound around the transmission shaft portion 35 and an input shaft 37 to the transmission case 24 to which the base of the pitching arm 15 is attached, and power is transmitted from the input shaft 37 to one grain culm pulling device via a bevel gear 39 or the like. Power is transmitted to 10. Further, the power is transmitted to the raking wheel 11, the reaping device 9, and the other grain culm pulling device 10 via the other bevel gear 40 of the transmission case 24, the shaft 41 in the pitching arm 15, etc., and the gear 42, the bevel gear 43, etc. The ear tip conveying device 12 and the grain culm stock source conveying device 6 are driven through the.

As shown in FIG. 1, the grain culm stock transfer device 6 connects a transfer chain 52 disposed on the lower surface of a main body case 51 to three drive sprockets 53, a starting end tension roller 54, and a terminal end tension roller 55. The tension roller 55 is placed so that the outer periphery of the end tension roller 55 faces the starting end of the feed chain 4.

A pinching rod 56 is disposed along the conveying direction on the surface of the conveying chain 52 between the starting end tension roller 54 and the terminal end tension roller 55, and the pinching rod 56 is connected to the main body 51. A support body 58 attached to the conveyor chain 52 via a substantially U-shaped connecting rod 57 is biased toward the surface of the conveyance chain 52 by the force of a spring 59.

Each base end portion 54a, 55a of the starting end tension roller 54 and the ending end tension roller 55,
The guide members 60 and 61 that are provided in a straight line opposite to each other on the back surface of the main body case 51 are respectively fitted and inserted so as to be movable back and forth.
A tension spring (not shown) attached to a and 55a
This urges both the tension rollers 54 and 55 to protrude outward from each other (in a direction away from each other). Reference numerals 64 and 65 indicate grain culm wrapping prevention plates attached to both the upper and lower surfaces of the terminal tension roller 55.

Reference numeral 68 denotes a grain stalk guide rod disposed from the support body 58 to which the clamping rod 56 is attached to the upper surface of the starting end of the feed chain 4, and the base end of the grain stalk guide rod 68 has a U-shaped cross section. Mold support member 69
The axis 7 at the free end side of the grain culm guide groove 68 is inserted into the left and right side plates of the
0 extends approximately along the grain culm conveying direction of the feed chain 4, and the vicinity of the free end of the grain culm guide rod 68 extends in the width direction approximately perpendicular to the grain culm conveying direction on the grain culm conveying action surface at the starting end of the feed chain 4. It is elastically biased via a helical spring 71 so as to press against the upper surface of the approximately midway portion.

Then, the support body 58 and the support member 69 are
The grain culm guide rod 68 is rotatably connected via a pivot shaft 72 having an axis substantially parallel to the axis 70, and the pivot shaft 72 is disposed at a position above the grain culm conveying surface in the feed chain 4 by an appropriate dimension. established,
Moreover, due to the spring 73 wrapped around this pivot 72,
The free end side of the grain culm guide rod 68 is the feed chain 4
It urges the grain culm conveying surface of the

At this time, the axis of the pivot 72 and the axis 70 of the grain culm guide rod 68 are arranged so that they are eccentric by a dimension (H2) in the axial direction of the roller link 75 that connects the claw plates 74 on both the left and right sides of the feed chain 4. do. The distance between the axis of the pivot 72 and the abutting portion of the grain culm guide rod 68 on the upper surface of the roller link 75 is the dimension (R1).

On the other hand, the terminal end of the grain culm stock transfer device 6, which changes its posture in accordance with the rolling rotation of the rolling arm 16, moves by a dimension (H1) as seen from the wrapping prevention plate 65 shown in FIG. do. That is, the upward rotation of the rolling arm 16 causes the terminal end of the grain culm stock transfer device 6 to approach the side of the feed chain 4 (see the dashed line in FIG. 3), and the downward rotation of the rolling arm 16 moves it away from the side of the feed chain 4. (See the two-dot chain line in Fig. 3), and its moving direction is determined by the roller link 75 of the feed chain 4 as shown in Fig. 5.
The pivot shaft 72, which is inclined with respect to the axis of the grain culm stock transfer device 6 and moves integrally with the grain culm stock transfer device 6, moves in the direction of symbol B by the upward rotation of the rotoring arm 16, and moves in the direction of symbol A by the downward rotation of the rotoring arm 16. It is meant to move to.

In this configuration, when the front part of the traveling body 1 traveling in the field scene 50 leans forward, the front end of the reaping pre-processing section 5 in front of it can touch the field scene 50.
At that time, pitching is performed manually or by switching the switching valve 30 via a sensor that detects the widening of the gap between the lower end of the reaping pretreatment section 5 and the field surface 50 to send hydraulic pressure to the hydraulic cylinder that is the pitching drive means 27. The distal end side of the arm 15 is raised so that the height of the reaping device 9 of the pre-reaping processing section 5 relative to the field scene 50 is controlled to a predetermined height.

When the front part of the traveling machine body 1 is tilted upward, pitching control is performed in such a manner that the reaping pre-processing section 5 is lowered via the pitching drive means 27 in the opposite manner to the above.

Furthermore, when one of the traveling crawlers of the traveling machine body 1 falls into a recess such as a groove in the field field 50 and tilts to the left or right, for example, when the left side of the traveling direction is tilted downward, the reaping on the right side, which is the opposite side. Pre-processing section 5
In order to lower the tip side of the rolling arm 16 so that the vertical distance between the lower surface and the approximately horizontal field 50 does not become large (see the two-dot chain line in FIG. 3), the piston rod of the hydraulic cylinder that is the rolling drive means 26 is moved. When the right side of the traveling machine body 1 is moved backward, conversely, when the right side of the traveling machine body 1 is lowered, hydraulic pressure is sent to the hydraulic cylinder to lift the tip side of the rolling arm 16 (see the dashed line in Fig. 3). So-called rolling control is performed so that the height is the same as that of the field 50.

During such rolling control, the grain culm stock transfer device 6 of the reaping pre-processing section 5 changes its posture with the rolling rotation of the rolling arm 16.
Pivot 72 supporting the grain guide rod 68 at the terminal end
When the distal end side of the rolling arm 16 is lowered, it moves in the direction of symbol A as shown by the two-dot chain line in FIG. 5, and on the contrary, when the distal end side of the rolling arm 16 is raised, Although it will move in the direction indicated by the dashed dotted line, the rotation radius dimension (R1) of the grain culm guide rod 68 up to the roller link 75 with the pivot 72 as the rotation center, and the grain culm guide rod 68 By appropriately setting the ratio of the eccentric dimension (H2) from the point where the free end side presses against the roller link 75 to the pivot shaft 72, the roller link 7
5 can be kept substantially constant and hardly displaced.

As a result, even if the distance between the terminal end of the grain culm stock transfer device 5 and the side of the starting end of the feed chain 4 changes, the distance between the free end side of the grain guide rod 68 at the grain culm joining part and the starting end of the feed chain 4 can be changed. Since the pressing point in the width direction, which is substantially perpendicular to the conveyance direction, does not change, the gripping posture of the grain culm root held between the free end side of the grain culm guide rod 68 and the left and right claw plates 74 of the feed chain 4, and, by extension, the grain culm. The posture of the ear tip side does not change, and the grain culm does not fall off or become disordered at the grain culm joint.

Note that the present invention has a pitching arm attached to the traveling machine body, a rolling arm attached to the pitching arm so as to be able to roll freely, and a reaping pre-processing section attached to the rolling arm, and a method in which the reaping pre-processing section is attached to the rolling arm. Needless to say, the present invention can also be applied to a device that is attached to a traveling machine so that it can swing vertically or horizontally, and the terminal end of the grain culm stock transfer device changes its attitude relative to the starting end of the feed chain. do not have.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of the main parts indicated by the - line in FIG. 2, FIG. 2 is a side view of the front part of the combine harvester, and FIG. 4 is a plan view taken along the - line in FIG. 2, FIG. 5 is a sectional view taken along the - line in FIG. 1, and FIG. 6 is a schematic diagram showing power transmission to the reaping pre-processing section. 7th
The figure shows a hydraulic circuit for rolling and pitching. 1... Traveling aircraft, 2... Running crawler, 3...
Threshing device, 4... Feed chain, 5... Reaping pre-processing section, 6... Grain culm stock source conveyance device, 12... Ear tip conveyance device, 7... Machine frame, 8... Grass splitting body, 9... Reaping device , 10...Grain culm pulling device, 15...Pitching arm, 16...Rolling arm, 17...Rotating shaft, 17a...Rolling rotation fulcrum, 19...Front frame, 20, 20... Support column, 21, 21...
... Rolling rotation bearing section, 23 ... Pitting rotation bearing section, 24 ... Transmission case, 25 ... Power transmission mechanism, 26 ... Rolling drive means, 27 ...
Pitching drive means, 51... Main body case, 52
... Conveyance chain, 53 ... Drive sprocket, 5
4... Starting end tension pulley, 54... Terminating end tension pulley, 56... Pincer rod, 58... Support body, 68... Grain culm guide rod, 69... Supporting member, 71... Vine winding Spring, 72... Axis, 73...
...Spring, 74, 74...Claw plate, 75...Roller link.

Claims (1)

[Scope of utility model registration request] The terminal end of the grain culm stock transfer device 6 provided in the reaping pre-processing unit 4 mounted on the traveling machine body 1 faces the starting end of the feed chain 4 in the threshing device 3 mounted on the traveling machine body, and the grain culm stock transport unit In the combine harvester configured to be able to adjust the grain culm inheritance depth from the terminal end to the starting end of the feed chain by moving the device near and far in the direction of the feed chain, A grain culm guide rod 68 extending along the grain culm conveying direction of the feed chain is disposed between the starting end of the feed chain and the grain culm conveying surface, and the base end of the grain culm guide rod is connected to the grain culm conveying surface. A shaft 73 is disposed to extend in the grain culm transport direction of the feed chain at an appropriate location at the terminal end of the stock transfer device, and is rotatably supported around the axis of the shaft. The culm guide rod is provided with a spring means 73 for urging its free end side against the grain culm conveying surface of the feed chain, and furthermore, the pivot shaft is disposed at a position separated from the grain culm conveying surface of the feed chain by an appropriate distance. A grain culm stock transfer device for a combine harvester, which is characterized by the following: