JP7042632B2 - Maintenance jig - Google Patents

Description

The present invention relates to a maintenance jig used in a combine or a harvester.

As a combine, generally, as shown in Patent Document 1, for example, crops in a field are harvested by a harvesting section, the harvested crops are threshed by a threshing section (threshing device), and the threshing section sorts the threshed products. Some are equipped with a sheave case for processing.

As a combine, there is a hair clipper type harvesting device adopted as a harvesting device of a cutting section.

As the combine, for example, as shown in Patent Document 1, a culm shredding device having a cutter (rotary blade) is provided at the rear of the threshing device, and the culm after the threshing process is shredded by the cutter. There is.

Japanese Unexamined Patent Publication No. 2013-169183

In a combine equipped with a sheave case in the threshing device, an opening is generally formed at the rear of the threshing device, and the sheave case is taken in and out through the opening. However, since the length of the sheave case in the front-rear direction tends to be long and the sheave case tends to be heavy, a lot of workers and a lot of labor are required to put in and take out the sheave case. It has become.

In a combine that uses a clipper-type harvester for the harvester, maintenance such as polishing and repairing the cutting blade of the harvester is required. Since the length of the cutting blade in the width direction of the machine tends to be long and it is difficult to hold the cutting blade, a lot of workers and a lot of labor are required for attaching and detaching the cutting blade to the cutting device. ..

In a combine that uses a rotary blade for the culm shredding device, maintenance such as polishing and repairing the rotary blade is required. Since the length of the rotary blade in the direction of the axis of rotation tends to be long and it is difficult to hold the rotary blade, a lot of workers and a lot of labor are required for the work of attaching and detaching the rotary blade to the culm shredding device. It has become.

The present invention provides a maintenance jig that allows the sheave case to be easily taken in and out, a maintenance jig that allows the cutting blade to be easily attached and detached, and a maintenance jig that allows the rotary blade to be easily attached and detached.

The present invention
In the combine, it is a maintenance jig used when the sheave case of the threshing device for threshing the crops harvested by the harvester is taken in and out from the opening formed at the rear of the threshing device.
A base that can be moved in a plane with respect to the work floor and can be inserted under the combine harvester.
A rear support portion that is erected at the rear portion of the base portion and can support the rear portion of the sheave case through the opening portion.
A front support portion that is erected on the front portion of the base portion and can support the front portion of the sheave case and can change the height for supporting the front portion of the sheave case is provided .
The front portion of the base portion is provided with a recessed portion that opens forward in a plan view.
When the base portion is inserted below the machine body, the combine traveling device is configured to be able to enter the recessed portion.
The rear support column is projected forward from both the left and right sides of the rear support column erected at the rear end portion of the base portion and the left and right sides of the rear support portion, and supports the rear portion of the sheave case behind the front support portion. It is equipped with left and right support arms .

According to this configuration, by inserting the base portion below the fuselage, the rear support portion supports the rear portion of the sheave case through the opening. By moving the base portion in a state of supporting the rear portion of the sheave case to the rear side of the machine body in a plane, the rear part of the sheave case is pulled out from the opening to the rear side of the machine body. When the rear part of the sheave case is pulled out to the rear side of the aircraft and the part of the sheave case on the front side of the rear part supported by the rear support part protrudes from the opening to the rear side of the aircraft, the support height is the height of the front part. The front part can be supported by the front support part in the state corresponding to. By further moving the base portion in which the rear support portion and the front support portion support the sheave case to the rear side of the machine body, the load of the sheave case is supported by the base portion via the rear support portion and the front support portion. While the sheave case is further pulled out to the rear side of the machine body, the entire sheave case is taken out from the opening to the rear of the threshing device.

By operating the maintenance jig in the reverse order of the above-mentioned removal order, the sheave case is pushed into the threshing device through the opening while the load of the sheave case is supported by the rear support portion and the front support portion. The entire sheave case is housed in the threshing device.

That is, by moving the base portion in a plane, the sheave case can be taken in and out from the opening while the load of the sheave case is supported by the base portion, and the sheave case can be taken in and out with a light work load for moving the base portion in a plane.
In the combine, the threshing device is generally placed above the traveling device. Focusing on this point, since the base part is inserted into the lower part of the machine while the traveling device is in the recessed part, the base part is positioned appropriately and stably under the threshing device, and the rear support part and the front support part are supported. The part can be properly acted on the sheave case.

The "height change" of the front support includes replacement of front supports having different heights, adjustment of the height position of the front support, and adjustment of the length of the front support. ..

In the present invention, it is preferable that the front support portion is removable from the base portion.

According to this configuration, by removing the front support part, the front support part does not become an obstacle when inserting the base part under the machine, so it is easy to insert the base part under the machine and the sheave case can be taken out. Easy to do.

In the present invention, it is preferable that the width of the base portion can be changed.

According to this configuration, when the width of the machine or the threshing device is different, the width of the base portion can be changed according to the width of the machine or the threshing device. It can be inserted properly or stably below.

In the present invention, the width of the left base portion located on the left side of the rear strut of the base portion can be changed, and the width of the recessed portion can be changed by changing the width of the left base portion. Is suitable.

Even if the width of the threshing device or the machine body is different, the right support arm can be properly acted on the sheave case by locating the right base portion having the rear support of the base portion below the threshing device. .. Focusing on this point, if the width of the threshing device or the machine is different, the width of the left base part is changed according to the width of the threshing device or the machine, and the width of the recessed part is adjusted to the width that the traveling device enters. In the state where the traveling device is inserted into the recessed portion, the base portion is inserted below the machine body, and the base portion is positioned appropriately and stably below the threshing device.

Therefore, even if the width of the threshing device or the machine is different, the left base can be easily operated by simply adjusting the width of the left base, and the base can be properly and stably positioned below the threshing device to support the left and right arms. Can properly support the sheave case.

In the present invention, it is preferable that the left-right spacing of the left and right support arms can be changed, and the height position of the left and right support arms can be changed.

According to this configuration, when the width and height position of the threshing device and the machine are different, the left and right spacing of the left and right support arms and the height position of the left and right support arms are changed according to the width and height of the threshing device and the machine. Therefore, even if the width and height position of the threshing device and the machine body are different, the sheave case can be accurately supported by the left and right support arms.

In the present invention, it is preferable that the length of the left and right support arms protruding forward from the rear strut can be changed.

According to this configuration, if the front-back position of the threshing device with respect to the machine and the front-back position with respect to the opening of the sheave case are different, the left and right support corresponds to the front-back position of the threshing device with respect to the machine and the front-back position with respect to the opening of the sheave case. Since the length of protrusion from the rear strut of the arm to the front can be changed, the sheave case is properly supported on the left and right support arms even if the front-back position of the threshing device with respect to the machine and the front-back position with respect to the opening of the sheave case are different. Can be made to.

In the present invention, the receiving portion which is opened forward at the front end portions of the left and right support arms and into which the swing shaft of the sheave case can be inserted and the opening of the receiving portion are opened and closed to open and close the swing shaft of the swing shaft. It is preferable that a lock portion that can regulate the escape from the receiving portion is provided.

According to this configuration, when the support arm reaches the swing shaft from the rear of the swing shaft, the swing shaft enters the receiving portion through the opening, and when the swing shaft enters the receiving portion, the opening is closed by the lock portion. As a result, the swing shaft does not come out of the receiving portion, and the support arm supports the swing shaft. As a result, the sheave case can be pulled out by the rear support portion by simply closing the opening with the lock portion.

In the present invention, it is preferable that attachments other than the left and right support arms can be attached to the rear support portion.

According to this configuration, by attaching attachments different from the left and right support arms, the rear support part has a function different from the function of supporting the sheave case, so it is a maintenance jig for purposes other than putting in and out of the sheave case. Can be used.

In the present invention, it is preferable that an attachment different from the front support portion can be attached to the front portion of the base portion.

According to this configuration, by attaching an attachment different from the front support part, the front part of the base part has a function different from the mechanism that supports the sheave case, so maintenance is used for purposes other than putting in and out the sheave case. Jigs can be used.

It is a left side view which shows the whole combine. It is a vertical sectional side view which shows the threshing apparatus. It is a perspective view which shows the whole maintenance jig. It is a vertical sectional view of a rear support part. It is a side view of a support arm. It is a vertical sectional view of a front support part. It is explanatory drawing which shows the procedure of taking out a sheave case. It is explanatory drawing which shows the procedure of taking out a sheave case. It is explanatory drawing which shows the procedure of taking out a sheave case. It is explanatory drawing which shows the procedure of taking out a sheave case. It is explanatory drawing which shows the procedure of taking out a sheave case. It is explanatory drawing which shows the procedure of taking out a sheave case. It is explanatory drawing which shows the procedure of taking out a sheave case. It is explanatory drawing which shows the procedure of taking out a sheave case. It is explanatory drawing which shows the procedure of taking out a sheave case. It is a perspective view which shows the whole maintenance jig to which the 1st support part and the 2nd support part are attached. It is a perspective view of the cutting blade support part. It is a side view which shows the cutting blade support part in the vertical posture and the cutting blade holding state. It is a side view which shows the cutting blade support part in the front-back posture and the cutting blade holding state. It is explanatory drawing which shows the taking-out procedure of a cutting blade. It is a front view which shows the cutting blade in a downward posture, and the blade part of a movable blade is displaced with respect to the blade part of a fixed blade. It is a front view which shows the cutting blade in the downward posture, and the movable blade and the cutting edge side of the movable blade are inserted into the cutting edge holding hole. It is explanatory drawing which shows the taking-out procedure of a cutting blade. It is explanatory drawing which shows the taking-out procedure of a cutting blade. It is explanatory drawing which shows the taking-out procedure of a rotary blade. It is explanatory drawing which shows the procedure of taking out a tilling claw.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The maintenance jig A (see FIG. 3) is used when the sheave case 34 of the threshing device 7 is taken in and out in the combine K as shown in FIG.

[About the overall composition of combine K]
In the following description, regarding the body 1 of the combine K, the direction of the arrow F shown in FIG. 1 is "front of the machine", the direction of the arrow B is "rear of the machine", the direction of the front side of the paper is "left side of the machine", and the back side of the paper. The direction of is "to the right of the aircraft".

As shown in FIG. 1, the combine K includes an airframe 1 formed by assembling bar-shaped members and a crawler-type traveling device 2 mounted on both lateral sides of the airframe 1. A driving unit 3 is provided on one side of the front portion of the machine body 1. The driving unit 3 is provided with a cabin 3A that covers the control space. Below the driving unit 3, a driving unit having an engine is provided. A harvesting section 4 for harvesting crops such as rice and wheat in the field is supported on the lateral side of the front portion of the machine body 1 opposite to the driving section side. The cutting section 4 is moved up and down between the lowering work state and the ascending non-working state by swinging the cutting section frame 5 up and down by the expansion and contraction of the elevating cylinder 6. A threshing device 7 and a grain tank 8 are provided at the rear of the machine body 1. A culm shredding device 9 for shredding the culm after the threshing process is provided at the rear of the threshing device 7. A grain discharging device 10 for discharging threshed grains from the grain tank 8 is connected to the rear portion of the grain tank 8.

[About the configuration of the cutting unit 4]
In the cutting section 4, as shown in FIG. 1, a divider 11 is provided at the front end portion of the cutting section 4, and a pulling device 12 is provided behind the divider 11. Planting culms of rice, wheat and the like as crops are introduced into the raising device 12 by the divider 11 and raised and processed by the raising device 12. A reaping device 13 is provided behind the lower part of the raising device 12, and a supply / transport device 14 is provided toward the threshing device 7 from above the reaping device 13. The root of the planted stem culm to be raised and processed is cut by the harvesting device 13, rice, wheat and the like are harvested as crops, and the harvested stem culm as the harvested crop is threshed by the supply and transport device 14. It is transported to the front part of the device 7.

[Structure of cutting device 13]
As shown in FIG. 21, the cutting device 13 is composed of a hair clipper type cutting device. The cutting device 13 is provided with cutting blades 16 provided so as to extend in the horizontal width direction of the machine below a plurality of weeds 15 arranged in the horizontal direction of the machine. The cutting blade 16 includes a fixed blade 17 and a movable blade 18 slidably provided on the upper surface side of the fixed blade 17. The fixed blade 17 is fixed to a base member 19 extending in the lateral width direction of the machine body. The movable blade 18 is slidably supported by the base member 19 via a knife bar 20 or the like. As shown in FIGS. 21 and 22, support pins 21 are provided at a plurality of positions of the base member 19 in the lateral width direction of the machine body. Each support pin 21 is detachably inserted into the support cylinder portion 22a provided on the support frame 22 from the lateral direction of the support cylinder portion 22a. The support frame 22 is supported by a plurality of weed basins 15.

The cutting blade 16 is supported by the support frame 22 via the base member 19 and the support pin 21, and has a downward swing with respect to the support frame 22 with the support pin 21 as a swing fulcrum (two points in FIG. 23). It is supported in a state in which the posture can be changed between the posture shown by the chain line) and the forward-looking posture for work (the posture shown by the solid line in FIG. 23) that swings up and down with respect to the support frame 22. As shown in FIG. 23, when the cutting blade 16 is in the forward posture, the fixing arm 23 extending from the base member 19 is connected to the support portion 15a of the weed basin 15 by a connecting bolt, so that the cutting blade 16 faces forward. Held in posture. The cutting blade 16 can be attached to and detached from the cutting device 13 together with the base member 19 by inserting and removing each support pin 21 with respect to the support cylinder portion 22a in a state where the connection of the fixed arm 23 to the weed basin 15 is released.

[About the configuration of the threshing device 7]
The threshing device 7 is supported by the machine body 1. As shown in FIG. 2, a threshing portion 7A is formed on the upper part of the threshing device 7. A sorting unit 7B is formed in the lower part of the threshing device 7. An opening 24 is formed at the rear of the threshing device 7.

In the threshing section 7A, as shown in FIG. 2, the stock root side of the cutting stem culm transported by the supply transport device 14 (see FIG. 1) is sandwiched by the threshing feed chain 25 and directed toward the rear of the threshing device 7. It is transported, and the tip side of the cut stem culm is inserted into the handling chamber 26 and threshed by the handling cylinder 27. The threshed grains obtained by the threshing treatment fall from the processed product leak hole of the receiving net 28. The culm after the threshing process is discharged to the rear outside of the handling chamber 26 through the dust feeding port 29 by the threshing feed chain 25. The threshing grains mixed in the threshing culm discharged from the handling chamber 26 are scraped from the threshing culm by the separation drum 30 and fall from the threshing culm. The culm after the separation drum 30 has acted is discharged to the rear outside of the threshing device 7 by the culm transport device 31.

As shown in FIG. 2, the sorting unit 7B is provided in the sorting chamber 33 and the sorting chamber 33 provided below the handling chamber 26 inside the threshing machine 32 and the rear portion of the handling chamber 26. It is equipped with a sheave case 34. A wall insert 35 is provided below the front portion of the sheave case 34. The first screw conveyor 36 and the second screw conveyor 37 are provided below the sheave case 34 in the sorting chamber 33. A dust fan 38 is provided in the upper part of the rear part of the sheave case 34 in the sorting chamber 33.

The inside of the sheave case 34 is equipped with a Glenpan 39, a chaff sheave 40, a Glenshive 41 and a straw rack 42. A roller 43 is supported at the front end of the sheave case 34. A support portion 51a having a recessed portion in which the roller 43 is rotatable and slidable is provided inside the threshing machine 32. The front end portion of the sheave case 34 is supported by the threshing machine 32 via the roller 43 and the support portion 51a, and is rotatable and slidable with respect to the threshing machine 32. A swing shaft 44 extending in the lateral width direction of the sheave case 34 is provided at the rear portion of the sheave case 34. As shown in FIGS. 11 and 15, the swing shaft 44 has a drive pulley 45 provided at one end of the swing shaft 44, and is driven to rotate by driving the drive pulley 45 with power from an engine. Will be done. The sheave case 34 swings in a state where the rear end side moves up and down with the front end side supported by the support portion 51a as the swing fulcrum by the swing operation by the swing shaft 44 that is rotationally driven.

In the sorting unit 7B, the threshed product such as the threshed grains dropped from the receiving net 28 and the separation drum 30 enters the sheave case 34. The threshed product contained in the sheave case 34 is shaken by the Glenpan 39, the chaff sheave 40, the Glenshive 41 and the straw rack 42 which are rocked by the sheave case 34, and receives the sorting wind supplied by the wall insert 35. It is sorted into threshed grains and dust such as straw waste. The fine grains of the selected threshed grains flow down to the first screw conveyor 36, are supplied to the grain raising device 46 by the first screw conveyor 36, and are conveyed to the grain tank 8 by the grain raising device 46. The untreated grains of the selected threshed grains flow down to the second screw conveyor 37, are supplied to the reduction device 47 by the second screw conveyor 37, and are reduced to the front part of the sheave case 34 by the reduction device 47. The sorted dust is discharged rearward from the rear end of the sheave case 34 and discharged to the rear outside of the threshing device 7 from the opening 24, or is sucked by the dust removal fan 38 together with the sorting wind and is discharged from the dust removal fan 38. The culm is discharged into the shredding case 9A of the shredding device 9.

The sheave case 34 is opened from the inside of the threshing device 7 by opening the sheave case 34 from the inside of the threshing device 7 by releasing the support of the swing shaft 44 by the threshing machine 32 and pulling out the roller 43 from the recessed portion of the support portion 51a. It can be taken out through. In this case, the roller 43 rolls on the guide surface of the guide rail 51 connected to the support portion 51a. That is, the sheave case 34 can be taken out from the inside of the threshing device 7 to the outside through the opening 24, or can be put into the inside from the outside of the threshing device 7 through the opening 24.

[About the configuration of the culm shredding device 9]
As shown in FIG. 2, an outlet 48 and a swing lid 49 for opening and closing the culm inlet 48 are provided on the upper part of the shredding case 9A. A pair of rotary blades 50 are rotatably provided inside the shredding case 9A.

In the culm shredding device 9, the shredding case 9A is along the rear part of the threshing device 7 and the shredding case is set by using the vertical support shaft of the threshing device provided at the lateral end of the shredding case 9A as a swinging fulcrum. Threshing in a state where the position can be changed over the usage position where the opening of 9A is closed and the maintenance position where the shredding case 9A is separated from the rear part of the threshing device 7 to the rear side and the opening of the shredding case 9A is opened. It is supported by the device 7.

In the culm shredding device 9, the position of the culm shredding device 9 is changed to the position where it is used, and the culm inlet 48 is opened, so that the culm discharged by the culm transport device 31 is discharged. It falls into the shredding case 9A through the charging port 48, is caught in the pair of rotary blades 50, and is shredded in the culm direction by the pair of rotary blades 50. The culm in the shredded state is discharged from the lower part of the shredded case 9A to the rear of the threshing device 7.

[About the configuration of maintenance jig A]
In the following description, regarding the maintenance jig A, the direction of the arrow F1 shown in FIG. 3 is "the front of the jig", the direction of the arrow B1 is "the rear of the jig", and the direction of the arrow L1 is "the left side of the jig". The direction of the arrow R1 is "to the right of the jig".

As shown in FIG. 3, the maintenance jig A includes a base portion 60, a rear support portion 70, and a front support portion 90.

[Structure of base unit 60]
As shown in FIG. 3, the base portion 60 includes a pair of left-right front-rear base portions 61 and a lateral base portion 62 connecting the rear portions of the left-right front-rear base portions 61. The left and right front-rear base portions 61 extend in a direction along the front-rear direction of the maintenance jig A and in a direction along the front-rear direction of the combine K body 1. In the present embodiment, the left-right front-rear direction base portion 61 and the side-facing base portion 62 are composed of a square tube member, but the present invention is not limited to this. As the members constituting the front-rear base portion 61 and the lateral base portion 62, any member such as a round cylinder member, a solid member, and an angle member may be adopted. The base portion 60 is configured so that the length of the base portion 60 in the front-rear direction is at least half the length of the sheave case 34 in the front-rear direction.

Castor wheels 63 are mounted at two front and rear positions in the lower portion of the base portion 60 on both lateral end sides. The caster wheel 63 makes it possible to move the base portion 60 in a plane with respect to a work floor G (see FIG. 7) such as the ground. As shown in FIGS. 3 and 11, the front portion of the base portion 60 is provided with a recessed portion 64 that opens forward in a plan view. As shown in FIGS. 8, 12, and 15, as the base portion 60 is moved from the rear of the combine K toward the machine body 1, the traveling device 2 located below the threshing device 7 enters the recessed portion 64. The base portion 60 can be inserted into a lower portion of the threshing device 7 below the machine body 1.

The width of the base portion 60 and the recessed portion 64 can be changed. Specifically, as shown in FIG. 3, the rear column 71 of the rear support portion 70 is erected from the intermediate portion of the lateral base portion 62. The sideways base portion 62 is provided with a right sideways base portion 62a on which the rear support column 71 stands, and a left sideways base portion 62b connected to the right sideways base portion 62a so as to be slidable and expandable. By adjusting the slide of the left lateral base portion 62b, the lateral width of the left base portion 60L on the left side of the rear support column 71 of the base portion 60 can be changed. The left base portion 60L is composed of a left laterally facing base portion 62b and a left front and rear facing base portion 61. The wider the width of the left base portion 60L, the wider the width of the base portion 60 and the width of the recessed portion 64. The narrower the width of the left base portion 60L, the narrower the width of the base portion 60 and the width of the recessed portion 64. When the width of the left base portion 60L is changed, the lock pin 65 is mounted over the pin hole of the right lateral base portion 62a and the pin hole 66 of the left lateral base portion 62b so that the left lateral base portion 62b is in the adjustment position. It is fixed and the width of the base portion 60 and the width of the recessed portion 64 are maintained at varying widths.

[Structure of rear support portion 70]
As shown in FIGS. 3, 8 and 12, the rear support portion 70 is erected at the rear portion of the base portion 60 and is configured to be able to support the rear portion of the sheave case 34 via the opening 24. ..

Specifically, as shown in FIG. 3, the rear support portion 70 has a rear strut 71 erected from the lateral base portion 62 as the rear portion of the base portion 60 and the rear strut 71 facing forward from the left and right sides of the rear strut 71. It comprises a protruding support arm 72. The left and right support arms 72 are a portion of the lateral arm portion 73 provided on the rear strut 71 located on the left side of the rear strut 71 and a portion of the lateral arm portion 73 located on the right side of the rear strut 71. Since then, each has been extended forward. As a result, the left and right support arms 72 project forward from the left and right sides of the rear strut 71. In the present embodiment, the left and right support arms 72 and the lateral arm portion 73 are composed of a square tube member, but the present invention is not limited to this. For example, as the member constituting the support arm 72 and the lateral arm portion 73, any member such as a round cylinder member, a solid member, and an angle member may be adopted.

As shown in FIGS. 3 and 5, the left and right support arms 72 are provided with a receiving portion 74 having a forward opening 74a and a locking portion 75 at the tip end portion of the support arm 72. The lock portion 75 is supported by the support arm 72 in a state where the support shaft 76 can be rotated around the center of rotation. A lock claw 75a is provided on the tip end side of the lock portion 75. When the lock portion 75 is rotated, the opening 74a is closed by the lock claw 75a as shown by the chain double-dashed line in FIG. 5, and the opening 74a is closed by the lock claw 75a as shown by the solid line in FIG. Switch to the unlocked state.

In the left and right support arms 72, when the base portion 60 is inserted below the machine body 1, the tip end side of the support arm 72 enters the inside of the threshing device 7 through the opening 24, and the tip end portion of the support arm 72 is the swing shaft 44. Reach from behind. When the tip of the support arm 72 reaches the swing shaft 44, the lock portion 75 is in the unlocked state due to gravity, so that the swing shaft 44 enters the receiving portion 74 through the opening 74a. When the swing shaft 44 enters the receiving portion 74, the lock portion 75 is switched to the locked state. When the lock portion 75 is in the locked state, it covers the swing shaft 44 from above and is held in the locked state by the swing shaft 44, and the locking portion 75 regulates the escape of the swing shaft 44 from the receiving portion 74. This makes it possible for the left and right support arms 72 to support the swing shaft 44 as the rear portion of the sheave case 34.

The rear support portion 70 is further forward from the rear strut 71 of the left and right support arms 72 so that the left-right spacing of the left and right support arms 72 can be changed and the height positions of the left and right support arms 72 can be changed. It is configured so that the protrusion length to can be changed.

That is, in the left and right support arms 72, as shown in FIGS. 3 and 5, the support arm 72 is connected to the lateral arm portion 73 via a connecting member 77 that is externally fitted to the support arm 72 and the lateral arm portion 73. To. The connecting member 77 is externally fitted to the support arm 72 and the lateral arm portion 73 so as to be relatively slidable. The connecting member 77 tightens and fixes the support arm 72 to the lateral arm portion 73 by pressing the support arm 72 and the lateral arm portion 73 against each other by the tightening force of the screw member 77a mounted on the lower portion of the connecting member 77.

By releasing the tightening of the connecting member 77 by the screw member 77a, the support arm 72 can be slid together with the connecting member 77 in the longitudinal direction of the lateral arm portion 73 with respect to the lateral arm portion 73. By sliding the support arm 72 with respect to the lateral arm portion 73, the mounting position of the support arm 72 in the lateral arm portion 73 can be changed. By sliding the support arm 72 of at least one of the left and right support arms 72 with respect to the lateral arm portion 73, the left-right spacing of the left and right support arms 72 changes.

By releasing the tightening of the connecting member 77 by the screw member 77a, the support arm 72 can be slid in the front-rear direction with respect to the connecting member 77 without changing the mounting position of the connecting member 77 in the lateral arm portion 73. .. By sliding the support arm 72 with respect to the connecting member 77, the connecting position of the support arm 72 with respect to the lateral arm portion 73 can be changed. By sliding the support arm 72 with respect to the connecting member 77, the projecting length of the support arm 72 from the rear column 71 to the front changes.

As shown in FIGS. It is supported by the guide rail portion 71a of the rear support column 71 via the wheel body 79. A lift shaft 80 is provided inside the rear strut 71 in a direction along the vertical direction of the rear strut 71. The lift shaft 80 is composed of a screw shaft. The upper and lower ends of the lift shaft 80 are supported by the rear strut 71 so as to be relatively rotatable. As shown in FIG. 4, the upper end portion of the lift shaft 80 is rotatably supported in the support hole of the rear support column 71 via the tubular member 81 fitted to the lift shaft 80. The tubular member 81 is fixed to the lift shaft 80 so as to be relatively non-rotatable and non-slideable via a screw member 82 mounted on the lift shaft 80 on the upper and lower sides of the tubular member 81. As shown in FIG. 4, the lift shaft 80 is engaged with a screw member 83 fixed to the connecting member 78 by welding. A handle 84 is provided at the upper end of the lift shaft 80 so as not to rotate relative to each other. The handle 84 and the screw member 82 are welded, and the screw member 82 and the lift shaft 80 are welded. As a result, the handle 84 is connected to the lift shaft 80 via the screw member 82 so as not to rotate relative to each other, and the lift shaft 80 can be rotated by the handle 84. When the lift shaft 80 is rotated, the connecting member 78 is guided to the guide rail portion 71a by the engagement between the screw member 83 and the lift shaft 80, and is lifted and lowered with respect to the rear support column 71, and the lateral arm portion 73 is moved. The left and right support arms 72 are moved up and down with respect to the rear column 71 by being moved up and down by the connecting member 78. That is, when the handle 84 is rotated, the height positions of the left and right support arms 72 change.

[Structure of front support portion 90]
As shown in FIGS. 3 and 10, the front support portion 90 is configured to be erected on the front portion of the base portion 60 to support the front portion of the sheave case 34.

Specifically, as shown in FIGS. 3 and 6, the front support portion 90 includes a pair of left and right strut portions 91 separately erected on the front portions of the left and right front-rear facing base portions 61, and a left strut portion. It is provided with a support rod 92 that is laid across the upper part of the 91 and the upper part of the right support column 91. As shown in FIG. 10, the front support portion 90 has a support rod with a portion of the sheave case 34 on the front side of the portion supported by the rear support portion 70 (swing shaft 44) as the front portion of the sheave case 34. It is configured to be received and supported from below by the portion 92. In the present embodiment, the portion of the sheave case 34 corresponding to the front portion of the chaff sheave 40 is configured to be supported by the support rod portion 92, but the present invention is not limited to this. Depending on the front-rear length of the sheave case 34, the weight distribution in the front-rear direction of the sheave case 34, etc., not only the part corresponding to the front part of the chaff sheave 40 but also any part should be supported by the front support part 90. It may be set.

The front support portion 90 is configured so that the height at which the sheave case 34 is supported can be changed.
Specifically, in the left and right strut portions 91, as shown in FIGS. 3 and 6, the strut portion 91 is provided with a lower strut portion 93 and an upper strut portion 94. The lower strut portion 93 is externally fitted to the strut-shaped support portion 95 of the front-rear facing base portion 61 so as to be slidable up and down. The support portion 95 is composed of a screw shaft. A stopper member 96 that receives the lower strut portion 93 from below and sets the mounting height of the lower strut portion 93 with respect to the support portion 95 is externally fitted to the support portion 95 and is engaged with the support portion 95. When the stopper member 96 is rotated by the handle 97, the stopper member 96 moves up and down with respect to the support portion 95, and the lower strut portion 93 moves up and down with respect to the support portion 95 by raising and lowering the stopper member 96. The mounting height of the 93 with respect to the support portion 95 changes.

A support rod support portion 98 that detachably supports the support rod portion 92 is provided on the upper portion of the upper strut portion 94. As shown in FIG. 6, the upper strut portion 94 is fitted onto the lower strut portion 93 so as to be slidable up and down. Pin holes 94a are provided at a plurality of locations in the vertical direction of the upper strut portion 94. By attaching a detachable connecting pin 99 across the pin hole 94a of the upper strut portion 94 and the pin hole 93a of the lower strut portion 93, the upper strut portion 94 is non-slidingly connected to the lower strut portion 93. .. By changing the pin hole 94a of the upper strut portion 94 to which the connecting pin 99 is mounted, the connection height of the upper strut portion 94 with respect to the lower strut portion 93 changes.

By changing at least one of the mounting height of the lower strut portion 93 with respect to the support portion 95 and the change of the connection height with respect to the lower strut portion 93 of the upper strut portion 94, the front support portion 90 becomes the sheave case 34. You can change the height to support. The change in the sheave case support height of the front support portion 90 due to the change in the mounting height of the lower strut portion 93 with respect to the support portion 95 is the change in the connection height of the front support portion 90 with respect to the lower strut portion 93 of the upper strut portion 94. It can be made finer than changing the support height of the sheave case.

The left and right strut portions 91 can be attached to and detached from the base portion 60 by attaching and detaching the lower strut portion 93 to the support portion 95. The front support portion 90 can be attached to and detached from the base portion 60 by attaching and detaching the left and right strut portions 91 to and from the base portion 60. The support rod portion 92 can be attached to and detached from the left and right strut portions 91.

The sheave case 34 is taken out by the maintenance jig A based on the taking-out procedure shown in FIGS. 7 to 15.

The width of the base portion 60 and the width of the recessed portion 64 are adjusted according to the width of the threshing device 7, the left-right position of the threshing device 7 with respect to the traveling device 2, the width of the traveling device 2, and the like. Further, the left-right spacing of the left and right support arms 72 corresponds to the width of the threshing device 7, the height of the threshing device 7, the front-rear position of the threshing device 7 with respect to the machine body 1, the front-back position of the sheave case 34 with respect to the opening 24, and the like. The height position of the left and right support arms 72 and the length of protrusion forward from the rear column 71 of the left and right support arms 72 are adjusted.

When the base portion 60, the recessed portion 64, and the left and right support arms 72 can be adjusted, as shown in FIGS. 7, 8, 11, 12, and 15, from the rear of the combine K located on the work floor G such as the ground. The maintenance jig A is moved toward the machine body 1, and the base portion 60 is inserted below the machine body 1 in a state where the traveling device 2 below the threshing device 7 enters the recessed portion 64. At this time, as shown in FIGS. 7 and 8, the position of the culm shredding device 9 is changed to the maintenance position, and the work space is exposed behind the opening 24. Further, as shown in FIGS. 7 and 8, the front support portion 90 is removed so as not to interfere with the insertion of the base portion 60.

As shown in FIGS. 8 and 12, when the base portion 60 enters the lower part of the machine body 1, the tip ends of the left and right support arms 72 enter the inside of the threshing device 7 from the opening 24 and the tips of the left and right support arms 72. Reach the swing shaft 44, and the swing shaft 44 is supported by the left and right support arms 72.
That is, the swing shaft 44 as the rear portion of the sheave case 34 is supported by the rear support portion 70. When the swing shaft 44 is supported by the rear support portion 70, the handle 84 is rotated to raise the left and right support arms 72 slightly, and the rear end side of the sheave case 34 is lifted to support the roller 43 of the sheave case 34. Extract from the recessed portion of the portion 51a.

When the roller 43 comes out of the recessed portion, the maintenance jig A is moved to the rear side as shown in FIGS. 9 and 13. Then, as shown in FIGS. 9 and 13, the sheave case 34 is pulled and transferred to the rear side by the rear support portion 70, and the rear portion of the sheave case 34 exits from the inside of the threshing device 7 to the outside through the opening 24. At this time, the roller 43 of the sheave case 34 rolls on the guide surface of the guide rail 51, and the front side of the sheave case 34 is supported by the guide rail 51.

As shown in FIGS. 9 and 13, when the front portion of the sheave case 34 to be supported by the front support portion 90 is pulled out from the opening 24, the roller 43 is fronted before being disengaged from the guide rail 51. The support portion 90 is attached to the base portion 60, and the front portion of the sheave case 34 is supported by the front support portion 90. At this time, the height of the front support portion 90 that supports the front portion of the sheave case 34 is adjusted to an appropriate height so that the sheave case 34 is stably supported by the rear support portion 70 and the front support portion 90. do.

When the sheave case 34 is stably supported, the maintenance jig A is further moved backward as shown in FIGS. 10 and 14. Then, the sheave case 34 is further pulled and transferred to the rear side by the rear support portion 70, and the entire sheave case 34 goes out from the inside of the threshing device 7.

The sheave case 34 is inserted by the maintenance jig A in the reverse order of the above-mentioned removal order, and by operating the maintenance jig A, the sheave case 34 is threshed from the opening 24 by the rear support portion 70. It is pushed into the inside of the 7 and the entire sheave case 34 fits inside the threshing device 7.

[Structure of the first attachment]
As shown in FIG. 16, the maintenance jig A is provided with a first support portion 100 as a first attachment. The first support portion 100 is erected on the base portion 60 to support the cutting blade 16 of the cutting device 13.

Specifically, the first support portion 100 is an attachment different from the front support portion 90, and is supported by the left and right support portions 95 of the base portion 60 in place of the support portions 91 of the front support portion 90. The first support 101 of the above is provided.

The left and right first supports 101 include a lower strut portion 93 and an upper strut portion 102, as shown in FIG. The lower strut portion 93 has the same configuration as the lower strut portion 93 of the strut portion 91 in the front support portion 90, and the strut portion 91 in the front support portion 90 and the first support 101 in the first support portion 100. And, it is shared as the lower strut portion 93. The upper strut portion 102 is externally fitted to the lower strut portion 93 so as to be slidable up and down. When the upper strut portion 102 is externally fitted to the lower strut portion 93, the lower strut portion 93 is fitted with a detachable connecting pin over the pin hole of the upper strut portion 102 and the pin hole of the lower strut portion 93. Is non-slidingly connected to. By attaching the connecting pin to one pin hole selected from the pin holes provided at the upper and lower positions of the upper strut portion 102, the connecting height of the upper strut portion 102 with respect to the lower strut portion 93 can be changed. The cutting device 13 is located lower than the sheave case 34 even if the cutting unit 4 is raised. As a result, the first support 101 is configured such that the length of the upper strut portion 102 is shorter than the length of the upper strut portion 94 of the front support portion 90.

As shown in FIGS. 16 and 17, a cutting blade support portion 103 is provided on the upper portion of the upper strut portion 102. The cutting blade support portion 103 is provided with a removable cutting blade holder 104. The cutting blade holding portion of the cutting blade support portion 103 is provided with a cutting edge holding hole 105. As shown in FIGS. 18 and 19, the cutting blade support portion 103 has the cutting edge side of the blade portion of the fixed blade 17 and the cutting edge side of the blade portion of the movable blade 18 inserted into the cutting edge holding hole 105, and the cutting blade holder 104. Is tightened and connected to the cutting blade support portion 103 by the connecting bolt 106, so that a part of the cutting blade 16 in the longitudinal direction is held.

As shown in FIGS. 18 and 19, the cutting blade support portion 103 is supported by the upper portion 102a of the upper strut portion 102 via the connecting pin 107, and the connecting pin 107 is used as a swing fulcrum for a vertical posture and a front-back posture. It is supported in a state where the posture can be changed. As shown in FIG. 18, the cutting blade support portion 103 has the cutting blade holding portion facing forward when it is in the vertical posture, and the cutting blade support portion 103 is in the front-back posture when it is in the front-back posture as shown in FIG. The holding part faces upward.

In the first support portion 100, the cutting blade support portion 103 of the left and right first supports 101 detachably holds a part of the cutting blade 16 together with the base member 19, so that the entire cutting blade 16 is held by the base member 19. At the same time, it becomes a state of supporting it so that it can be attached and detached. The first support portion 100 is in the first support state when the left and right cutting blade support portions 103 are changed to the vertical posture, and the left and right cutting blade support portions 103 are changed to the front-back posture. Will be in the second support state. The cutting blade 16 can be held in the downward state by the first support portion 100 in the first support state. The cutting blade 16 can be held in a horizontal state by the first support portion 100 in the first support state.

The maintenance jig A has a function of attaching and detaching the cutting blade 16 of the cutting device 13 by attaching the first support portion 100 as the first attachment.

The cutting blade 16 is removed by the maintenance jig A to which the first support portion 100 is mounted, based on the removal procedure shown in FIGS. 20 to 24.

As shown in FIG. 20, the maintenance jig A is moved toward the reaping device 13 from the front of the combine K which is located on the work floor G such as the ground and the reaping portion 4 is raised, and the base portion 60 is formed. The front side is inserted below the cutting device 13 to position the first support portion 100 below the cutting blade 16.

When the first support portion 100 is located below the cutting blade 16, as shown in FIG. 21, as shown by the alternate long and short dash line in FIG. 23, the fixed arm 23 is disconnected from the weed basin 15. The posture of the cutting blade 16 is changed from the forward posture to the downward posture. The fixed arm 23 is located between the left and right first supports 101.

When the cutting blade 16 is in the downward posture, the movable blade 18 is slid and operated, and the blade portion of the movable blade 18 is displaced with respect to the blade portion of the fixed blade 17 as shown in FIG. 21. As described above, the state of the cutting blade 16 is changed so that the blade portion of the movable blade 18 and the blade portion of the fixed blade 17 overlap each other.

When the blade portion of the movable blade 18 and the blade portion of the fixed blade 17 overlap each other, the stopper member 96 is rotated on the left and right first support 101 as shown in FIGS. 22 and 23 to rotate the first support 101. To raise. At this time, the left and right cutting blade support portions 103 are placed in a vertically oriented posture as shown in FIGS. 22, 23, and 24, the first support portion 100 is placed in the first support state, and the movable blades are in an overlapping state. The blade portion of the blade portion 18 and the blade portion of the fixed blade 17 are inserted into the blade edge holding hole 105. When the insertion into the cutting edge holding hole 105 on the cutting edge side is completed, the cutting blade holder 104 is attached to the left and right cutting blade support portions 103 as shown in FIGS. 18 and 22. Then, the cutting blade 16 is supported by the first support portion 100 together with the base member 19 in a downward posture.

When the cutting blade 16 is supported by the first support portion 100, the maintenance jig A is laterally moved.
Then, as shown in FIG. 22, the cutting blade 16 moves laterally with respect to the support frame 22, each support pin 21 comes out of the support cylinder portion 22a, the base member 19 comes off from the support frame 22, and the cutting blade 16 Disengages from the reaping device 13. When the cutting blade 16 is disengaged from the cutting device 13, the maintenance jig A is moved to the front side of the combine K and the base portion 60 is extended from the lower side of the cutting portion 4 to the front and outer sides of the cutting portion 4. It can be carried out to the front and outside of the cutting section 4. When the cutting blade 16 is removed from the cutting device 13 or the cutting blade 16 detached from the cutting device 13 is carried, the cutting blade 16 is held in a downward posture and is not easily bent and deformed.

When the cutting blade 16 is carried out, when the state of the first support portion 100 is changed from the first support state to the second support state, the cutting blade 16 is supported in a horizontal state as shown in FIG. 19 and cut. The blade 16 is easy to polish and repair.

In the mounting of the cutting blade 16 by the maintenance jig A to which the first support portion 100 is mounted, the base member 19 is supported by operating the maintenance jig A in the reverse order of the order in the case of the above-mentioned removal. It is connected to the frame 22 and the cutting blade 16 is attached to the cutting device 13.

[Structure of the second attachment]
As shown in FIG. 16, the maintenance jig A is provided with a second support portion 110 as a second attachment. The second support portion 110 is erected at the rear portion of the base portion 60 to support the rotary blade 50 of the culm shredding device 9.

Specifically, the second support portion 110 is an attachment different from the left and right support arms 72, and includes a pair of left and right second supports 111 supported by the rear support portion 70.

As shown in FIG. 16, the left and right second supports 111 include a rotary blade support arm 112 and a mounting rod 113 that supports the lower portion of the rotary blade support arm 112 on the tip end side. A rotary blade receiving portion 114 is provided on the upper portion of the rotary blade support arm 112. The rotary blade receiving portion 114 is configured to enter between the disc blades of the rotary blade 50 and receive and support the rotary shaft portion 50a (see FIG. 2) of the rotary blade 50 from below.

As shown in FIG. 16, the left and right second supports 111 are configured to be detachably supported by the lateral arm portion 73 of the rear support portion 70. Specifically, the posture supported by the lateral arm portion 73 of the support arm 72 is changed from the forward posture in which the receiving portion 74 is located on the front side of the lateral arm portion 73, and the receiving portion 74 is on the rear side of the lateral arm portion 73. The posture is changed to the backward posture located at the position of, and the mounting rod 113 of the second support 111 is detachably connected to the tip end side of the support arm 72 in the backward posture.

As a result, the second support portion 110 is detachably supported by the rear support portion 70. Since the left and right second supports 111 are supported by the lateral arm portion 73 that is supported by the rear strut 71 so as to be movable up and down, the second support portion 110 is a rear support portion in a state where the mounting height can be changed. Supported by 70.

The maintenance jig A has a function of attaching and detaching the rotary blade 50 of the culm shredding device 9 by attaching the second support portion 110 as the second attachment.

The rotary blade 50 is taken out by the maintenance jig A to which the second support portion 110 is attached based on the removal procedure shown in FIG. 25.

As shown in FIG. 25, the maintenance jig A is shredded from the side of the combine K which is located on the work floor G such as the ground and the position of the culm shredding device 9 is changed to the maintenance position. The base portion 60 is moved toward the device 9 and inserted under the culm shredding device 9, and the left and right rotary blade support arms 112 of the second support portion 110 are positioned below the rotary blade 50.

When the left and right rotary blade support arms 112 are located below the rotary blade 50, the handle 84 is rotated to raise the lateral arm portion 73, and the second support portion 110 is raised to raise the left and right rotary blade support arms 112. The rotary blade receiving portion 114 is attached to the rotary shaft portion 50a of the rotary blade 50 from below. When the rotary blade receiving portion 114 can be attached to the rotary shaft portion 50a, the maintenance jig A is moved toward the lateral side of the combine K to separate the second support portion 110 from the culm shredding device 9. Then, the rotary blade 50 is taken out from the inside of the shredding case 9A by the second support portion 110.

In the mounting of the rotary blade 50 by the maintenance jig A to which the second support portion 110 is mounted, the rotary blade 50 is moved to the left and right by operating the maintenance jig A in the reverse order of the above-mentioned removal order. It is brought into the shredded case 9A by the second support 111 of the above.

[Another Embodiment]
(1) In the above embodiment, by changing the height position of the front support portion 90 and the length of the front support portion, the height at which the front support portion supports the front portion of the sheave case is changed. Examples are shown, but are not limited to this. For example, a configuration in which front support portions having different heights are replaced, a configuration in which only the height position of the front support portion is changed, or a configuration in which only the length of the front support portion is changed may be adopted.

(2) In the above-described embodiment, an example configured to support the swing shaft 44 of the rear support portion 70 is shown, but the present invention is not limited to this. For example, the sheave case 34 may be configured to directly support the sheave case 34, such as the rear frame portion of the sheave case 34.

(3) In the above-described embodiment, an example is shown in which the sheave case 34 is supported by a pair of left and right support arms 72, but the present invention is not limited to this. For example, a support member having any structure such as one support arm whose tip side is divided into two may be adopted.

(4) In the above-described embodiment, an example configured so that the width of the base portion 60 and the width of the recessed portion 64 can be changed is shown, but the present invention is not limited to this. For example, when the maintenance jig A is configured to be used only for a combine of a specific model, the width of the base portion 60 and the recessed portion 64 may be fixed to a certain width.

(5) In the above-described embodiment, an example is shown in which the maintenance jig A for inserting and removing the sheave case is configured to have a cutting blade attachment / detachment function and a rotary blade attachment / detachment function by an attachment, but the present invention is not limited to this. The maintenance jig may be configured exclusively for putting in and taking out the sheave case, for attaching / detaching the cutting blade, or for attaching / detaching the rotary blade.

(6) As shown in FIG. 26, the maintenance jig A can be used for attaching / detaching the tilling claw 121 in the rotary tilling device 120 of the tractor.
Specifically, as shown in FIG. 26, the pair of left and right claw supports 122 of the attachment for the tilling device are attached to the left and right support portions 95 of the base portion 60 instead of the left and right strut portions 91 of the front support portion 90. do. The front end side of the base portion 60 to which the claw support 122 is mounted is inserted below the raised rotary tiller 120, and the height of the claw support 122 is the same as when the rotary blade 50 of the combine is taken out. After adjusting the height, the claw receiving portion 122a on the upper part of the claw support 122 is attached to the rotating shaft portion 121a of the tilling claw 121 from below. When the claw receiving portion 122a can be attached to the rotating shaft portion 121a, the maintenance jig A is moved rearward from the rotary tilling device 120.
Then, the tilling claw 121 is taken out from the rotary tilling device 120 and pulled out to the rear.

The present invention is not limited to the crawler type traveling device, but can be applied to a combine equipped with a wheel or a traveling device in which wheels and a mini crawler are combined, and a harvester other than the combine.

2 Traveling device 4 Cutting part 7 Threshing device 13 Cutting device 16 Cutting blade 24 Opening 34 Sheave case 44 Swing shaft 60 Base part 60L Left base part 64 Recessed part 70 Rear support part 71 Rear strut 72 Support arm 74 Receiving part 74a Opening 75 Lock part 100 Support part that supports the cutting blade (first attachment)
110 Support part that supports the rotary blade (second attachment)

Claims (9)

In the combine, it is a maintenance jig used when the sheave case of the threshing device for threshing the crops harvested by the harvester is taken in and out from the opening formed at the rear of the threshing device.
A base that can be moved in a plane with respect to the work floor and can be inserted under the combine harvester.
A rear support portion that is erected at the rear portion of the base portion and can support the rear portion of the sheave case through the opening portion.
A front support portion that is erected on the front portion of the base portion and can support the front portion of the sheave case and can change the height for supporting the front portion of the sheave case is provided .
The front portion of the base portion is provided with a recessed portion that opens forward in a plan view.
When the base portion is inserted below the machine body, the combine traveling device is configured to be able to enter the recessed portion.
The rear support column is projected forward from both the left and right sides of the rear support column erected at the rear end portion of the base portion and the left and right sides of the rear support portion, and supports the rear portion of the sheave case behind the front support portion. A maintenance jig equipped with left and right support arms . The maintenance jig according to claim 1, wherein the front support portion is removable from the base portion. The maintenance jig according to claim 1 or 2, wherein the width of the base portion can be changed. The width of the left base portion located on the left side of the rear strut of the base portion can be changed.
The maintenance jig according to claim 3 , wherein the width of the recessed portion can be changed by changing the width of the left base portion. The maintenance jig according to any one of claims 1 to 4 , wherein the left-right spacing of the left and right support arms can be changed, and the height position of the left and right support arms can be changed. The maintenance jig according to claim 5 , wherein the protrusion length of the left and right support arms from the rear support column to the front can be changed. A receiving portion that opens forward at the front ends of the left and right support arms and into which the swing shaft of the sheave case can be inserted, and an opening of the receiving portion are opened and closed so that the swing shaft can be inserted from the receiving portion. The maintenance jig according to any one of claims 4 to 6 , which is provided with a lock portion capable of restricting slip-out. The maintenance jig according to any one of claims 4 to 7 , wherein attachments other than the left and right support arms can be attached to the rear support portion. The maintenance jig according to any one of claims 1 to 8 , wherein an attachment different from the front support portion can be attached to the front portion of the base portion.

Images