JP2019004787A - Harvester - Google Patents

Abstract

To simplify a mechanism for restricting contraction of a cylinder, and simplify operation required for the restriction.SOLUTION: A harvester includes: a lowering restriction part 120 changeable in a posture from a non-usage state along a rear part of a harvesting part, and a usage state capable of restricting contraction of a cylinder 11 through a bracing action on the harvesting part and a cylinder tube 11a in the cylinder 11 in a stretched state; and a holding part for holding the lowering restriction part 120 in the non-usage state. The holding part includes a first member 141 provided in one of the harvesting part and the lowering restriction part 120, and extending along a direction crossing the direction of movement of a free end part of the lowering restriction part 120 when the lowering restriction part 120 starts to lower from the non-usage state, a second member 142 provided in the other of the harvesting part and the lowering restriction part 120, and switchable between a locking state of being locked to the first member 141, and a locking release state of not being locked to the frist member 141, and an energization member for energizing the second member 142 to a locking state side.SELECTED DRAWING: Figure 12

Description

  The present invention includes a traveling machine body, a harvesting portion which is provided in front of the traveling machine body and is supported by the traveling machine body so as to swing up and down between an ascending position and a descending position, a cylinder tube, and a piston rod. The cylinder tube end is supported by the traveling machine body, the piston rod end is supported by the harvesting section, and the harvesting section is vertically swung by expansion and contraction, and the harvesting section, In a state of being positioned above the cylinder with the traveling machine body, the harvesting unit is supported so as to be able to swing up and down, and is operated to be lifted to a non-use state along the back part of the harvesting unit, and is operated to be lowered. A lowering restricting portion capable of changing its posture to a use state capable of restricting contraction of the cylinder by acting on the cylinder tube in the harvesting portion and the cylinder in the extended state, and the lowering restriction About harvester comprising a holding portion for holding the in the non-use state.

  Patent Document 1 discloses a harvesting machine including a cutting processing unit and a cutting conveyance unit including a feeder. The mowing processing unit is provided in front of the machine body, harvests the crop, and feeds the harvested crop to the middle part of the machine body width to join. The feeder is provided behind the harvesting processing unit, and transports the crops merged in the harvesting processing unit toward the threshing device. The hydraulic cylinder is horizontally mounted between the bottom surface of the feeder case of the feeder and the lower front part of the machine body, and the cutting and conveying unit can be driven up and down by expansion and contraction of the hydraulic cylinder. In addition, the feeder case is provided with a lock for restricting the contraction of the hydraulic cylinder when the hydraulic cylinder extends to support the cutting and conveying unit ascending.

  A fulcrum of the lock tool is fixed to the bottom surface of the feeder case, and the lock tool can swing up and down around the fulcrum. The locking device is in a non-use state at the raised position along the bottom surface of the feeder case, and is in a usable state capable of regulating the contraction of the extended hydraulic cylinder at the lowered position lowered from the raised position. A plate-like position holding portion along the bottom surface portion of the feeder case is provided at the free end portion on the opposite side to the fulcrum side of the locking device, and an insertion hole is formed in the position holding portion. Further, a locking pin that protrudes downward from the bottom surface portion is provided on the bottom surface portion of the feeder case. In order to put the lock tool in a non-use state, the lock tool is positioned along the bottom surface portion of the feeder case, and the locking pin is engaged with the insertion hole of the position holding portion. Further, a locking pin is fixed to the bottom surface portion of the feeder case so as to prevent the locking pin from coming out of the insertion hole of the position holding portion with a beta pin as another member. On the other hand, in order to put the locking tool into use, the beta pin is removed, the locking tool is lowered, and the locking pin is removed from the insertion hole. Then, the lowered locking tool is fitted into the hydraulic cylinder extended so as to support the cutting conveyance unit at the raised position. Thereby, contraction of the hydraulic cylinder can be prevented, and the lowering of the cutting and conveying unit at the raised position can be prevented.

JP2015-165816A

  However, in order to hold the locking device of Patent Document 1 in a non-use state, it is necessary to attach a beta pin so that the locking pin cannot be removed from the insertion hole of the position holding portion. This is because the up-and-down swinging direction in which the free end portion of the locking tool moves coincides with the up-and-down direction that is the protruding direction of the locking pin. In other words, when the locking tool to which the position holding part is attached is lifted to the bottom side of the feeder case, the position holding part is only fitted through the insertion hole from the protruding direction of the locking pin. This is because the locking device swings downward due to its own weight unless the above is held. Therefore, in patent document 1, in order to hold | maintain a locking tool in a non-use state, it is necessary to provide the beta pin of another member other than a position holding part and a locking pin. Therefore, there is a possibility that the loss of the beta pin as another member may occur when the beta pin is removed in order to put the locking device into a use state. In particular, the position holding part is attached to the locking device and the locking pin is attached to the bottom part of the feeder case, whereas the beta pin is a separate and independent member, so the problem of beta pin loss is significant. Become. Further, in the non-use state and the use state of the locking device, the operation is complicated by the amount necessary to attach and remove the beta pin.

  Therefore, an object of the present invention is to simplify a mechanism for regulating the contraction of a cylinder and to simplify an operation required for the regulation.

The characteristic configuration of the harvester according to the present invention is:
Traveling aircraft,
A harvesting portion provided in front of the traveling machine body and supported by the traveling machine body so as to be vertically swingable between a raised position and a lowered position;
It has a cylinder tube and a piston rod, the end on the cylinder tube side is supported by the traveling machine body, the end on the piston rod side is supported by the harvesting unit, and the harvesting unit is swung up and down by expansion and contraction. A cylinder to be
In a state of being positioned above the cylinder between the harvesting unit and the traveling machine body, the harvesting unit is supported by the harvesting unit so as to be able to swing up and down, and is lifted to a non-use state along the back part of the harvesting unit. A lowering restricting portion capable of changing the posture to a use state in which the harvesting portion and the cylinder tube of the cylinder in the extended state are operated to restrict the contraction of the cylinder;
A holding part for holding the lowering restricting part in the non-use state,
The holding part is provided in one of the harvesting part and the lowering restriction part, and intersects the moving direction of the free end part of the lowering restriction part when the lowering restriction part starts to descend from the non-use state. A first member extending along the other side of the harvesting part and the lowering restriction part, and can be switched between a locking state locked to the first member and a locking release state not locked to the first member. A second member and a biasing member that biases the second member toward the locked state.

According to this configuration, the lowering restriction portion is supported by the harvesting portion so as to be swingable up and down, and is lifted and held in a non-use state by the holding portion in a state along the back portion of the harvesting portion. In this holding part, the 1st member provided in one of the harvesting part and the descent | fall control part is extended along the direction which cross | intersects the moving direction in which the free end part of a descent | fall control part descends from the back part of a harvesting part. Then, the second member provided on the other of the harvesting part and the descending restriction part is urged to the locking state side with the first member by the urging member, so that the second member is locked to the first member. To do.
When the lowering restriction part is brought into a non-use state along the back part of the harvesting part by the raising operation, it is lowered by its own weight if there is no holding. In this configuration, the extending direction of the first member intersects the moving direction of the heel end portion of the lowering restricting portion. For this reason, the lowering restricting portion can be held in a non-use state only by the second member engaging the first member. Therefore, when the lowering restricting portion is kept in the non-use state, an independent separate member other than the first member, the second member, and the urging member is unnecessary, and there is a problem that the separate member is lost. The cost increase by providing can be avoided.
The holding of the lowering restricting portion in the non-use state is a simple configuration of the first member, the second member, and the urging member, and the second member is locked to the first member by the urging force of the urging member. This can be achieved with a simple operation. Conversely, the posture change to the use state of the lowering restricting portion can also be achieved by a simple operation of removing the second member from the first member against the urging force of the urging member.

The characteristic configuration of the harvester according to the present invention is:
The second member and the biasing member are configured by a leaf spring,
A locking hole is formed in the plate-like surface of the second member,
The first member is a rod-shaped member that can be locked in the locking hole.

  In this configuration, the second member and the urging member can be configured by a single leaf spring, the structure of the holding portion is simplified, and the first member and the first member can be easily operated by simply bending the second member. The locking operation with the two members is possible, and the locking between the first member and the second member can be maintained by the biasing force of the leaf spring itself.

The characteristic configuration of the harvester according to the present invention is:
The first member is provided in the harvesting part,
The second member is provided at the lowering restricting portion.

  When the lowering restricting portion is put into a non-use state, the operator lifts the lowering restricting portion by hand and operates it. Similarly, when operating the holding portion, the operator manually operates the second member against the biasing force of the biasing member. If it is this structure, the 2nd member by the side which carries out locking operation by the hand is provided in the descent | fall control part of the side lifted by hand. That is, since the lowering restricting portion and the second member are configured as an integral unit, for example, the lower portion of the harvesting portion is a narrow space or a slightly dark space, and the second member can be searched. It is easy to find the second member even in a situation where it must be searched. As a result, it is possible to provide a holding unit with good operability regardless of the surrounding environment.

It is the whole left side view of a combine. It is a whole top view of a combine. It is a right view of the cutting process part for demonstrating the mechanism which prevents the rocking | fluctuation to the front of a take-in reel. It is a top view of a cutting device. It is a left sectional view of a cutting device. It is a right view of the cutting processing part for demonstrating a cutting | disconnection transmission mechanism. It is a right view of the cutting processing part for demonstrating a transverse feed transmission mechanism. It is a left view of a tension ring body fixing mechanism. It is sectional drawing which shows the connection relationship of a tension ring body and a guide nut. It is a left view of a feeder when a descent | fall control part is hold | maintained in a non-use state. It is a left view of the periphery of the feeder when the lowering restricting portion is in use. It is a disassembled perspective view of a descent | fall control part and a cylinder. It is a top view of the descent | fall control part of a non-use state. It is XIV-XIV sectional drawing in FIG.

Hereinafter, an embodiment of a normal combine as an example of a harvester according to the present invention will be described with reference to the drawings.
〔overall structure〕
FIGS. 1 and 2 show ordinary combine harvesters for harvesting crops such as rice, wheat, and soybeans. In this embodiment, when defining the longitudinal direction of the combine traveling aircraft, it is defined along the aircraft traveling direction in the working state, and when defining the lateral direction of the aircraft, the left and right in the state viewed from the aircraft traveling direction. Define That is, the direction indicated by the reference symbol (F) in FIGS. 1 and 2 is the front side of the aircraft, and the direction indicated by the reference symbol (B) in FIGS. The direction indicated by reference sign (L) in FIG. 2 is the left side of the aircraft, and the direction indicated by reference sign (R) in FIG. Therefore, the left-right direction of the body corresponds to the lateral direction of the traveling body.

  A pair of left and right crawler traveling devices 2 are provided in the lower part of the body frame 1 of the traveling body. A harvesting unit 3 for harvesting and transporting a crop to be harvested is provided on the front side of the traveling machine body. And the threshing device 4 which handles the harvested cereal as a crop conveyed from the harvesting unit 3 on the machine body frame 1 and sorts the threshing processed product obtained by the handling processing into the grain and the discharged product. The grain tank 5 for storing the grain obtained by the threshing device 4, the grain discharge device 6 for discharging the grain stored in the grain tank 5 to the outside of the aircraft, and the operator boarding the operation A driving unit 7 is provided. The combine is configured as an all-pile-feeding type in which the planted cereal culm is cut and harvested, and all the harvested cereal culm is put into the threshing device 4.

  The operation unit 7 is located on the right side of the front part of the machine body, and the Glen tank 5 is located behind the operation unit 7. Furthermore, the threshing device 4 and the Glen tank 5 are arranged in the left-right direction with the threshing device 4 positioned on the left side and the Glen tank 5 positioned on the right side. A driving engine 8 is provided below the operation unit 7.

  The harvesting unit 3 includes a cutting processing unit 9 and a feeder 10. The cutting processing unit 9 is provided at the front end of the traveling machine body, and the feeder 10 is provided behind the cutting processing unit 9 and on the left side of the front of the machine body adjacent to the driving unit 7. The harvesting processing unit 9 harvests the planted cereal culm as a crop to be harvested, and cross-feeds the harvested crop (reached cereal culm) to the horizontal width intermediate part. The feeder 10 conveys the crops merged in the cutting processing unit 9 backward toward the threshing device 4 through the connection opening 21 with the cutting processing unit 9. The harvesting unit 3 including the cutting processing unit 9 and the feeder 10 is moved up and down around the horizontal axis P <b> 1 by the expansion and contraction operation of the hydraulic cylinder 11 for raising and lowering the harvesting that extends between the machine body frame 1 and the feeder 10. It is supported so that it can swing up and down between positions.

  The harvesting processing unit 9 is supported by a harvesting frame 17 configured by connecting square pipes, angle members having an L-shaped cross section, and the like, and a pair of left and right dividers 13 provided at the foremost end of the traveling machine body, A scraping reel 14 positioned rearward and upward, a cutting device 15 positioned rearward of the divider 13, and a lateral feed conveyance device 16 positioned between the cutting device 15 and the feeder 10 are provided. The divider 13 weeds the planted cereal rice to be harvested and the planted cereal rice to be harvested. The pick-up reel 14 drives the planted culm to be harvested backwards. The cutting device 15 is a device that cuts and harvests the planted side of the harvested planted culm that has been scraped backward by the scraping reel 14, for example, a cutting blade (receiving blade 50, It has a movable blade 51). The lateral feed conveying device 16 laterally feeds the harvested cereal grains after being cut by the cutting device 15 to the intermediate side in the left-right direction, and collects and feeds them backward.

Hereinafter, the take-up reel 14, the cutting device 15, the lateral feed conveyance device 16, and the feeder 10 will be further described.
[Scratching reel]
The take-up reel 14 will be described.
As shown in FIGS. 1 to 3, the take-up reel 14 is supported by left and right support arms 22 (a right support arm 22 a and a left support arm 22 b) that extend forward from the upper part of the rear end side of the harvesting frame 17. It is provided in a state where it is installed and supported. In other words, a reel frame 24 is provided at the left and right end portions of the drive shaft 23 rotatably supported at the distal end portions of the pair of support arms 22 so as to be integrally rotatable. Each of the pair of left and right reel frames 24 has a six-leg shape in a side view.

  A right swing arm 30a is provided at the upper part of the rear end side of the right support arm 22a, and a left swing arm 30b is provided at the upper part of the rear end side of the left support arm 22b. The lower part of the right swing arm 30a and the lower part of the left swing arm 30b are swingably supported by a lateral connection frame 31 extending in the left-right direction at the swing support point P2. As shown in FIGS. 1 and 3, one end of the connecting rod 25 is connected to the right swing arm 30 a on the outer side in the width direction, and the other end of the connecting rod 25 is connected to the slide member 33. ing. That is, the upper end portion of the right swing arm 30 a and the slide member 33 are connected via the connecting rod 25. The slide member 33 is formed in, for example, a U-shape with an open top, and the right support arm 22a is fitted into the U-shape, and the slide member 33 can slide relative to the right support arm 22a. . Similarly, in the left swing arm 30b, the left swing arm 30b and the slide member are connected via a connecting rod, and the slide member can slide with respect to the left support arm 22b.

  One end portion of the hydraulic cylinder 27 provided corresponding to the right support arm 22a is connected to a connecting member 41 attached to the right support arm 22a, and the other end portion is connected to the right support arm 22a. It is connected to a member not shown. Therefore, the right swing arm 30a swings around the swing fulcrum P2 via a member (not shown) due to the expansion and contraction of the hydraulic cylinder 27. Since the left swing arm 30b is connected to the right swing arm 30a via the lateral connection frame 31, the left swing arm 30b swings around the swing fulcrum P2 in conjunction with the swing of the right swing arm 30a. Move. By such swinging of the right swing arm 30a and the left swing arm 30b, the take-up reel 14 moves forward and backward.

As shown in FIG. 3, the right swing arm 30a is configured to have a contact portion 31a that contacts the upper surface of the right support arm 22a when tilted forward. As shown by the solid line in FIG. 3, when the right swing arm 30a swings forward by the hydraulic cylinder 27, the connecting rod 25 also swings forward, and the slide member 33 slides forward along the right support arm 22a. Move. At this time, the contact portion 31a of the right swing arm 30a contacts the upper surface of the right support arm 22a, so that excessive forward swing of the right swing arm 30a is restricted. Therefore, excessive swinging forward of the right swing arm 30a can be regulated with a simple configuration using the right swing arm 30a itself without providing a separate member.
On the other hand, as shown by the broken line in FIG. 3, when the right swing arm 30a is swung rearward about the swing fulcrum P2 by the hydraulic cylinder 27, the connecting rod 25 swings rearward, and the slide member 33 moves. It slides backward along the right support arm 22a. Backward swing of the right swing arm 30a is restricted by the maximum extension of the hydraulic cylinder 27, for example.

The left swing arm 30b does not have a contact portion with the left support arm 22b, but swings in conjunction with the right swing arm 30a. Therefore, the forward swing of the right swing arm 30a is restricted. As a result, the forward swing is restricted. Further, the left swing arm 30b is regulated by, for example, the maximum extension of the corresponding cylinder, and also regulated by the backward swing regulation of the right swing arm 30a that is swung simultaneously.
By such swinging of the right swing arm 30a and the left swing arm 30b, the take-up reel 14 moves forward and backward. The forward movement of the take-up reel 14 can also be restricted by restricting the forward swing of the swing arm 30.

[Cutting device]
The cutting device 15 will be described.
As shown in FIGS. 3 to 5, the cutting device 15 includes an angle-shaped base 49 attached and fixed back-to-back to a connecting frame 28 extending across the width of the machine body, and a receiver attached to the base 49. A blade 50, a movable blade 51 slidably supported with respect to the receiving blade 50, a knife bar 52 that drives the movable blade 51, and a knife that is held to prevent the movable blade 51 from sliding while being allowed to slide. A clip 53 and a spacer 54 are provided.

  The movable blade 51 is a plate-like blade that extends so that the width decreases toward the front of the machine body. The movable blade 51 is mounted on the knife bar 52 by a bolt 110 in a state where a plurality of blades are arranged along the long knife bar 52 extending in the machine width direction so as to be adjacent to each other in the machine width direction. The receiving blade 50 is also a plate-like blade extending so that its width becomes narrower in the forward direction of the machine body, and a space S <b> 1 is formed inside the receiving blade 50. The movable blade 51 is attached to the knife bar 52 so as to enter the space S1 of the receiving blade 50. When power from the engine 8 is transmitted, the knife bar 52 is reciprocated at a predetermined pitch, and the movable blade 51 attached to the knife bar 52 reciprocates. Thereby, by the cooperation of the receiving blade 50 and the movable blade 51 in the fixed state, the planted cereal stock can be cut and cut.

  When the cutting device 15 is enlarged and becomes longer in the body width direction, the cutting device 15 bends due to its own weight or the like. For example, the knife clip 53 is pushed downward by the downward bending of the long knife bar 52 and the downward bending of the base 49. Thereby, the force with which the knife clip 53 receives the movable blade 51 toward the blade 50 increases. Originally, the knife clip 53 is for preventing the movable blade 51 from being lifted and pushing the movable blade 51 toward the receiving blade 50. However, due to the bending of the cutting device 15, the knife clip 53 excessively pushes the movable blade 51 toward the receiving blade 50, thereby increasing the sliding resistance of the movable blade 51 with respect to the receiving blade 50. In order to avoid this, as shown in FIG. 5, a spacer 54 is provided between the knife clip 53 and the base 49 so that a predetermined space S <b> 2 is provided between the knife clip 53 and the movable blade 51. It is composed. Accordingly, excessive contact between the knife clip 53 and the movable blade 51 is avoided, and the knife clip 53 is prevented from excessively pushing the movable blade 51 toward the blade 50.

  Next, the cutting transmission mechanism 81 of the cutting device 15 will be described. As shown in FIG. 6, the cutting transmission mechanism 81 includes a cutting blade drive rotating body 70 positioned on the rear upper side, a cutting blade driven rotating body 71 positioned on the front lower portion, and a belt or the like wound around them. And an endless rotating body 73. When the power from the engine 8 is transmitted, the cutting blade driving rotator 70 rotates about the rotating shaft 70a, whereby the endless rotating body 73 rotates and the cutting blade driven rotating body 71 rotates on the rotating shaft 71a. Rotate around. As shown in FIGS. 4 and 6, the rotational power is transmitted to the front-rear transmission shaft 39 moving along the front-rear direction, and the power transmitted to the front-rear transmission shaft 39 is transmitted to the direction conversion mechanism 80. Is converted to the left and right directions and transmitted to the cutting blade drive arm 40. Thereby, the cutting device 15 drives the movable blade 51 along the left-right direction, and cuts the planted cereal stock by cooperating with the receiving blade 50.

  The cutting transmission mechanism 81 further includes a cutting blade tension ring body 72 for adjusting the tension of the endless rotating body 73, a tension arm 74 having one end connected to the cutting blade tension ring body 72, A spring 78 connected to the end, an on / off swing body 77 for swinging the spring 78, an on / off locking portion 79 formed with an on / off position 79a and a cutting position 79b, and a desired on / off locking portion 79 And an operating lever 76 that is operated to the locking position.

The cutting blade tension ring body 72 is provided to apply tension to the endless rotating body 73. The cutting blade tension ring body 72 is provided at a position between the cutting blade driving rotary body 70 and the cutting blade driven rotary body 71 so as to push the endless rotating body 73 from above. When the operator sets the operation lever 76 at the entering position 79a or the cutting position 79b formed by a notch formed in the on / off locking portion 79, the on / off rocking body 77 is swung to a position corresponding to the operation. . Thereby, the length of the spring 78 connected to the on / off oscillating body 77 varies, and the tension by the cutting blade tension ring body 72 is adjusted.
Here, when the endless rotating body 73 is slackened downward, the cutting blade tension ring body 72 is moved downward according to the slack. Therefore, the tension arm 74 swings around the support shaft 75, and the extension of the spring 78 is reduced. However, the material of the spring 78 and the characteristics such as the spring constant are such that even when the endless rotating body 73 is loosened and the spring 78 is contracted, the spring 78 is longer than the natural length (extends), and the tension arm 74 is on the pulling side. It is set to be energized. Therefore, since the tension arm 74 is always pulled by the spring 78, a desired tension can be continuously applied to the endless rotating body 73 by the cutting blade tension ring body 72.

[Transverse feed device]
The lateral feed transport device 16 will be described.
As shown in FIG. 2, the lateral feed conveyance device 16 includes a large-diameter cylindrical drum 59 and a pair of left and right spiral blades 60 provided on the outer periphery thereof. As the motive power of the engine 8 is transmitted and the drum 59 rotates forward, the pair of left and right spiral blades 60 perform a lateral feed function toward the connection opening 21 at the front end of the feeder 10.

  As shown in FIG. 7, a lateral feed transmission mechanism 95 (for example, a lateral feed drive rotator 90) is provided on the left side of the cutting transmission mechanism 81 (for example, the cutting blade drive rotator 70), that is, on the rear side in the side view of FIG. Has been placed. The lateral feed transmission mechanism 95 includes a lateral feed drive rotator 90 located on the rear upper side, a lateral feed driven rotator 91 located on the front lower portion, and an endless rotating body 93 made of, for example, a chain wound around them. It has. When the power from the engine 8 is transmitted, the lateral feed drive rotator 90 rotates about the rotation shaft 90a, thereby rotating the endless rotation body 83 and the lateral feed driven rotation body 91 by the rotation shaft 91a. Rotate around. Thereby, the transverse feed conveying device 16 rotates, the harvested cereal grains cut by the cutting device 15 are laterally fed to the intermediate side in the left-right direction, gathered, and fed toward the rear threshing device 4.

  The lateral feed transmission mechanism 95 further includes a tension ring body 92 and a tension ring body fixing mechanism 100. The tension ring body 92 is provided to apply tension to the endless rotating body 93. The tension ring body 92 is provided at a position between the lateral feed driving rotator 90 and the lateral feed driven rotator 91 to push the endless rotating body 93 from above. The tension ring body fixing mechanism 100 is provided corresponding to the tension ring body 92, and is a mechanism that supports the tension shaft 92a of the tension ring body 92 and fixes the tension ring body 92 at a set position.

As shown in FIGS. 7 to 9, the tension ring body fixing mechanism 100 includes a guide body 101 composed of a pair of side walls extending in the vertical direction, an upper member 103 covering the upper portion of the guide body 101, and a pair of guide bodies 101. A front wall 102 that connects the side walls and faces the tension ring body 92, and a guide nut 104 fitted in the pair of side walls of the guide body 101 are provided.
A box-shaped space is formed by the pair of left and right guide bodies 101, the upper member 103, and the front wall 102, and a guide nut 104 is fitted in this space. The guide nut 104 is formed of a hexagon nut, and is arranged so that two opposing sides are in contact with a pair of side walls of the guide body 101. A nut hole 104 a into which the tension shaft 92 a of the tension ring body 92 is inserted is formed at the center of the guide nut 104. In addition, a long hole 105 extending in the vertical direction penetrating through the front wall 102 is formed in the front wall 102 corresponding to the nut hole 104a. In the tension ring body 92, the tension shaft 92a is inserted into the elongated hole 105, and is further inserted into the nut hole 104a of the guide nut 104. The tension shaft 92 a can change the vertical position within the range of the long hole 105.
The upper member 103 has a threaded opening into which a bolt 106 described later is screwed.

  Further, the tension ring body fixing mechanism 100 includes a bolt 106 and a welding nut 107 and a nut 108 to which the bolt 106 is screwed. The welding nut 107 has a threaded opening into which the bolt 106 is screwed, and is welded to the lower surface of the upper member 103 so that this opening corresponds to the opening of the upper member 103. The nut 108 has a threaded opening into which the bolt 106 is screwed, and is provided at a position facing the welding nut 107 with the upper member 103 interposed therebetween. Therefore, the upper member 103, the nut 108, and the welding nut 107 are all screwed into the bolt 106.

  Next, a method for fixing the tension ring body 92 by the tension ring body fixing mechanism 100 will be described. The bolt 106 is screwed into the welding nut 107, the upper member 103, and the nut 108, and the nut 108 is moved to a position away from the upper member 103. At this time, the upper part 104 b of the guide nut 104 is brought into contact with the lower end part of the bolt 106. Accordingly, the guide nut 104 can be moved up and down within the guide body 101 by rotating the bolt 106 in a direction in which the bolt 106 is moved upward or downward. The tension ring body 92 is biased upward by the endless rotating body 93, and the guide nut 104 moves upward when the bolt 106 is rotated in a direction to move upward. On the other hand, when the bolt 106 is rotated in the direction of moving downward, the guide nut 104 moves downward against the upward biasing force from the endless rotating body 93 received by the tension ring body 92.

Here, the tension shaft 92 a of the tension ring body 92 is inserted into the nut hole 104 a of the guide nut 104 through the long hole 105 of the front wall 102. Therefore, the tension shaft 92a and the guide nut 104 can move in the vertical direction by the length of the long hole 105 in the vertical direction. Then, the rotation of the bolt 106 is adjusted within the vertical range of the long hole 105, and the guide nut 104 is moved upward or downward to be set at a desired position. At that position, the nut 108 is rotated to the side in contact with the upper member 103, the upper member 103 is sandwiched between the nut 108 and the welding nut 107, and the bolt 106 is fixed. As a result, the guide nut 104 that contacts the bolt 106 is fixed at a desired position.
When the position of the guide nut 104 is adjusted again, the nut 108 is moved upward, the guide nut 104 is set to a desired position as described above, and then the nut 108 is rotated to the side in contact with the upper member 103. Then, the guide nut 104 is fixed.

  With the tension ring body fixing mechanism 100 as described above, the guide nut 104 that supports the tension shaft 92a can be fixed at a desired position, and the tension ring body 92 can be fixed at a desired position. Therefore, for example, even when the tension ring body 92 receives force from the endless rotating body 93, the tension ring body 92 can be maintained in a desired position by the tension ring body fixing mechanism 100. Therefore, it is possible to prevent displacement of the tension ring body 92 from a desired position.

〔feeder〕
As shown in FIG. 1, the feeder 10 includes a pair of endless left and right ends within a rectangular tube-like feeder case 85 that extends across a driving wheel body 86 located on the rear upper side and a driven wheel body 87 located on the lower front side. A rotating chain 88 is wound, and a locking conveyance body (not shown) is installed at predetermined pitches across a pair of left and right endless rotating chains 88. A connection opening 21 communicating with the cutting processing unit 9 is formed at the front end of the feeder case 85. The rear end portion of the feeder case 85 is communicated with the threshing device 4. Then, the feeder 10 conveys the harvested crop (reached cereal meal) delivered from the reaping processing unit 9 toward the threshing device 4 by the endless rotating chain 88 rotating.

  As shown in FIGS. 10 to 13, the feeder case 85 in the feeder 10 is formed in a rectangular tube shape including a right vertical wall portion 10 a, a left vertical wall portion 10 b, an upper surface portion 10 c, and a bottom surface portion 10 d. . As shown in FIGS. 1 and 10, the hydraulic cylinder 11 is horizontally connected between the bottom surface portion 10 d of the feeder case 85 and the front portion of the body frame 1. The hydraulic cylinder 11 has a substantially cylindrical cylinder tube 11a and a piston rod 11b. The piston rod 11b has a smaller diameter than the cylinder tube 11a, can be accommodated in the cylinder tube 11a, and expands and contracts with respect to the cylinder tube 11a. By the expansion / contraction operation of the hydraulic cylinder 11, the feeder 10 swings up and down, and the harvesting unit 3 swings up and down.

  A lowering restricting portion 120 is provided on the bottom surface portion 10 d of the feeder case 85 so as to be able to swing up and down while being positioned above the hydraulic cylinder 11. The hydraulic cylinder 11 is disposed at a position close to the machine body width intermediate portion in order to support the harvesting unit 3 in the machine body width direction intermediate portion with good balance. Therefore, the lowering restricting portion 120 is provided at a position corresponding to the hydraulic cylinder 11 in the bottom surface portion 10d near the intermediate body width, that is, closer to the right vertical wall portion 10a than the left vertical wall portion 10b. Yes.

  When the hydraulic cylinder 11 is in the extended state, the lowering restricting unit 120 restricts the contraction of the hydraulic cylinder 11 and restricts the harvesting unit 3 from descending. As shown in FIG. 12, the lowering restricting portion 120 is formed so that the cross-sectional shape has a generally U-shaped opening downward in a front-rear direction view. Further, as shown in FIG. 11, when the piston rod 11 b of the hydraulic cylinder 11 is extended, the lowering restriction unit 120 is operated to be lowered so as to cover the piston rod 11 b with the U-shaped opening. Thus, the flange end portion of the lowering restricting portion 120 comes into contact with one end portion of the cylinder tube 11a. Thereby, the descent | fall control part 120 acts on the bottom face part 10d and the one end part of the cylinder tube 11a, and will be in a use condition. On the other hand, as shown in FIG. 10, the lowering restriction part 120 is placed in a non-use state by being raised and arranged along the bottom face part 10 d. As described above, the lowering restricting unit 120 is configured to be able to change the posture between the use state and the non-use state by swinging up and down.

  Next, the attachment of the hydraulic cylinder 11 and the lowering restriction portion 120 will be described below. An attachment member 130 for attaching the hydraulic cylinder 11 and the lowering restriction portion 120 is provided on the bottom surface portion 10 d of the feeder case 85. In the mounting member 130, a rectangular tube-shaped corner member 131 is attached to the bottom surface portion 10 d, and a mounting bracket 132 having a flat plate along the bottom surface portion 10 d is provided behind the corner member 131. A U-shaped pin holding member 133 opened rearward in a plan view is provided so as to project downward from a flat plate along the bottom surface portion 10 d of the mounting bracket 132. A connecting hole 134 is formed in each of the opposing side walls of the pin holding member 133. A connecting pin 135 provided on the mounting plate 136 is inserted into the connecting hole 134. The attachment plate 136 is attached to the corner member 131 by screwing a bolt 137 into the bolt hole.

  The through hole at one end of the piston rod 11b, the through hole at one end of the lowering restricting portion 120, and the connecting hole 134 of the pin holding member 133 are aligned, and the connecting pin 135 is inserted into the aligned hole. They are fixed. Specifically, one end of the piston rod 11b is inserted into the U-shaped opening of the pin holding member 133 so that the coupling hole 134 and the through hole of the piston rod 11b and the lowering restricting portion 120 coincide with each other. One end of the lowering restricting portion 120 is fitted so as to sandwich the U-shaped opening of the holding member 133 and fixed by the connecting pin 135. As a result, one end portion of the hydraulic cylinder 11 is connected to the bottom surface portion 10d, and one end portion of the lowering restriction portion 120 is pivotally supported so as to be vertically swingable. Although not described in detail, the other end portion of the hydraulic cylinder 11, that is, the other end portion of the cylinder tube 11 a is pivotally supported by the front portion of the body frame 1. Further, the lowering restricting portion 120 can swing up and down between the use state and the non-use state with the connecting pin 135 as a swing fulcrum, but in the non-use state, the free end portion which is the other end is a holding portion. 140 is fixed to the bottom surface portion 10d.

  Below, the structure of the holding | maintenance part 140 is demonstrated. The holding part 140 includes a first member 141 connected to a reinforcing member 144 described later, a second member 142 provided at the free end of the lowering restriction part 120, and a biasing member that applies a biasing force to the second member 142. 145. The second member 142 is formed with an insertion hole (locking hole) 143 in which the first member 141 can be locked. The second member 142 uses the biasing force and restoring force of the biasing member 145 to lock the first member 141 through the insertion hole 143 and the first member 141. It is possible to switch to a non-locking state.

  The reinforcing member 144 to which the first member 141 is coupled is fixed to the bottom surface portion 10d at a rear position spaced from the lowering restriction portion 120 that is not in use. The reinforcing member 144 extends over the entire length of the feeder case 85 in the left-right direction, and is configured in a U shape that opens downward in a side view. Specifically, the reinforcing member 144 includes a bottom portion 144b fixed to the bottom surface portion 10d, a front-side front side wall 144a protruding downward from the bottom portion 144b, and a rear-side rear side wall 144c protruding downward from the bottom portion 144b. Is provided.

The first member 141 is connected to the upper end portion of the front side wall 144a, that is, the end portion on the bottom surface portion 10d side of the front side wall 144a. The first member 141 includes portions 141a to 141c. As for the 1st member 141, the part 141a and the part 141c are extended in the left-right reversal symmetry centering on the part 141b. Specifically, the portion 141a extends leftward from one end portion toward the other end portion along the front side wall 144a extending along the left-right direction. The portion 141b is bent forward at approximately 90 ° from the other end portion of the portion 141a and extends in a direction away from the front side wall 144a from one end portion to the other end portion, that is, forward. The portion 141c is bent at approximately 90 ° in the left direction from the other end portion of the portion 141b, and extends in the left direction from the one end portion toward the other end portion. Therefore, the first member 141 is bent in a zigzag shape (Z-shape) bent twice in plan view. And the part 141a of the 1st member 141 is being fixed to the front side wall 144a, and the 1st member 141 whole is being fixed with respect to the front side wall 144a.
Here, the portion 141 c of the first member 141 is a portion that engages with the insertion hole 143 of the second member 142. The portion 141c of the first member 141 extends in the left-right direction with respect to the up-down direction of movement with the connecting pin 135 of the lowering restricting portion 120 as a swing fulcrum. That is, the portion 141c of the first member 141 extends along the left-right direction that is substantially orthogonal to the vertical movement direction of the free end portion of the lowering restriction portion 120.

The first member 141 is provided on the reinforcing member 144 on the bottom surface portion 10d side of the feeder case 85, whereas the second member 142 and the urging member 145 are provided on the flange end portion of the lowering restriction portion 120. Yes. Specifically, the second member 142 and the urging member 145 are attached to the left outer side surface of the free end portion of the lowering restriction portion 120 via the interposed member 146. In other words, the second member 142 and the urging member 145 are attached to the lowering restriction part 120 via the interposition member 146 on the left side, which is the side where the operation part 7 on the right side of the body front side is not present. Thereby, since the switching operation | work of the use state of the descent | fall control part 120 or a non-use state is performed using the wide space where the operation part 7 is not arrange | positioned, workability | operativity can be improved.
The interposition member 146 is a plate-like member along the front-rear direction, and a part of the intervening member 146 is connected to the upper side of the free end portion of the left outer side surface along the front-rear direction of the lowering restriction portion 120. And the remaining part of the interposition member 146 protrudes upwards from the upper end by the side of the feeder 10 of the descent | fall control part 120 in side view. A second member 142 and an urging member 145 are attached to a portion of the interposition member 146 that protrudes upward from the descending restriction portion 120 via a bolt 147. One end of the second member 142 and the biasing member 145 is attached to the interposition member 146 by a bolt 147 and protrudes rearward from the lowering restriction portion 120 and extends in the front-rear direction.

The coupling of the interposed member 146 with the second member 142 and the biasing member 145 by the bolt 147 will be further described. As shown in FIG. 14, the interposition member 146 protrudes from the lowering restriction portion 120 toward the bottom surface portion 10 d in a state where the lowering restriction portion 120 is along the bottom surface portion 10 d of the feeder case 85. The second member 142 and the urging member 145 are attached to the portion from which the interposition member 146 protrudes with a bolt 147. The second member 142 and the urging member 145 extend in a direction orthogonal to the paper surface, that is, in the front-rear direction.
FIG. 14 also shows the magnitude relationship between the lowering restricting portion 120 and the cylinder tube 11a and the piston rod 11b. As shown in FIG. 14, the piston rod 11 b can be fitted into the U-shaped opening of the lowering restricting portion 120. On the other hand, the cylinder tube 11a has a diameter larger than that of the piston rod 11b, and the flange end portion of the lowering restricting portion 120 comes into contact with one end portion of the cylinder tube 11a. In this case, if the second member 142 and the urging member 145 are directly connected to the lowering restriction part 120 by a bolt, the bolt may protrude into the lowering restriction part 120 and interfere with the piston rod 11b. However, as described above, since the second member 142 and the urging member 145 are attached to the interposition member 146 protruding from the descending restriction portion 120 by the bolt 147, the bolt 147 can be prevented from interfering with the piston rod 11b. .

  The positional relationship between the first member 141, the second member 142, and the biasing member 145 will be described further. As shown in FIGS. 12 and 13, the second member 142 and the biasing member attached to the interposition member 146 145 extends in the front-rear direction. That is, the second member 142 and the urging member 145 extend in the front-rear direction intersecting the direction extending in the left-right direction with respect to the portion 141 c of the first member 141 protruding in the left-right direction. And the 1st member 141 is attached to the reinforcement member 144 so that the 2nd member 142 may extend on the extension of the front-back direction, The insertion hole 143 of the 2nd member 142, the part 141c of the 1st member 141, Are associated with each other.

  The first member 141 described above is composed of, for example, a rod-shaped member. Moreover, the 2nd member 142 and the urging | biasing member 145 are comprised from a leaf | plate spring. The leaf spring is configured, for example, by interposing an elastic member as the biasing member 145 in the second member 142. Or the leaf | plate spring may be comprised from the plate-shaped elastic member, for example.

  In order to put the lowering restricting portion 120 into a non-use state, first, the lowering restricting portion 120 is positioned on the bottom surface portion 10d, and the second member 142 is moved away from the first member 141 against the biasing force of the biasing member 145. In other words, force is applied in the left direction. Then, the second member 142 is urged toward the first member 141 using the restoring force that the urging member 145 returns to, and the portion 141 c of the first member 141 is inserted into the insertion hole 143 of the second member 142. . Thereby, the 2nd member 142 can be latched by the 1st member 141, and the descent | fall control part 120 can be hold | maintained in the non-use state along the bottom face part 10d of the feeder case 85. FIG.

If the lowering restricting portion 120 is only positioned on the bottom surface portion 10d and there is no holding, the lowering restricting portion 120 is lowered by its own weight. In the above configuration, the left-right direction in which the portion 141c of the first member 141 extends is substantially orthogonal to the vertical movement direction in which the flange end portion of the lowering restriction portion 120 descends from the bottom surface portion 10d. Therefore, the descent | fall control part 120 can be hold | maintained in a non-use state only by the 2nd member 142 latching to the part 141c of the 1st member 141. FIG. Therefore, in the holding of the lowering restriction part 120 in the non-use state, a separate member other than the first member 141, the second member 142, and the urging member 145 is unnecessary, and a problem of losing the separate member, An increase in cost due to the provision of a separate member can be avoided.
Further, the holding of the lowering restricting portion 120 in the non-use state is performed by a simple configuration of the first member 141, the second member 142, and the urging member 145, and the second member 142 is urged by the urging force of the urging member 145. This can be achieved by a simple operation of locking to the member 141. Conversely, the posture change of the lowering restriction unit 120 to the use state can also be achieved by a simple operation of removing the second member 142 from the first member 141 against the urging force of the urging member 145.

  Further, as described above, the first member 141 is provided on the bottom surface portion 10d side of the feeder case 85, and the second member 142 is provided on the lowering restriction portion 120. When the lowering restriction part 120 is put into a non-use state, the operator lifts the lowering restriction part 120 by hand and operates it. Similarly, when the second member 142 is locked to the first member 141 in order to hold the lowering restricting unit 120 in the non-use state, the operator resists the biasing force of the biasing member 145 and the second member 142. Will be operated by hand. If it is the said structure, the 2nd member 142 by the side which carries out locking operation by the hand is provided in the descent | fall control part 120 by the side lifted by hand. That is, since the lowering restricting portion 120 and the second member 142 are configured as an integral unit, for example, the lower part of the feeder case 85 is a narrow space or a slightly dark space, and the second member Even in a situation where 142 must be searched by hand, it is easy to find the second member 142. As a result, the holding unit 140 having good operability can be obtained regardless of the surrounding environment.

[Another embodiment]
(1)
In the above embodiment, the portion 141 c of the first member 141 extends along the left-right direction that is substantially orthogonal to the up-down movement direction of the free end portion of the lowering restriction portion 120. However, it is only necessary to prevent the lowering restriction portion 120 from descending and be positioned on the bottom surface portion 10d side, and the direction in which the portion 141c of the first member 141 extends is not limited to the left-right direction. For example, the portion 141c of the first member 141 only needs to extend at least along a direction that intersects with the moving direction of the free end portion of the lowering restriction portion 120, such as an oblique direction.
Moreover, in the said embodiment, the 1st member 141 is comprised by the shape bent twice. However, the first member 141 is not limited to this shape as long as it extends in the intersecting direction including the orthogonal direction and the oblique direction with respect to the moving direction of the free end portion of the lowering restriction portion 120. Further, the member to which the first member 141 is attached is not limited to the reinforcing member 144. For example, the first member 141 may be attached such that a bar-like member extending in the left-right direction protrudes from the bottom surface portion 10 d of the feeder case 85.

(2)
In the above embodiment, the first member 141 is provided on the bottom surface portion 10d side of the feeder case 85 via the reinforcing member 144, and the second member 142 is provided on the lowering restriction portion 120. However, the first member 141 may be provided so as to protrude from the descending restriction portion 120 in the left-right direction. And the 2nd member 142 may be attached so that it may extend in the front-back direction with respect to the reinforcing member 144 provided in the bottom face part 10d of the feeder case 85. FIG.
Moreover, in the said embodiment, the part 141c of the 1st member 141 is extended in the left direction with respect to the part 141b. The second member 142 is attached to the left outer side of the free end portion of the lowering restriction portion 120. However, the 1st member 141 and the 2nd member 142 should just be able to engage, and those attachment aspects are not limited to this. For example, the portion 141c of the first member 141 may extend in the right direction, and the second member 142 may be attached to the right outside of the free end portion of the lowering restriction portion 120. However, it is preferable that the second member 142 is attached below the feeder 10 at a position where the operator can easily operate the second member 142 by putting his hand.

(3)
In the above embodiment, the first member 141 is a rod-shaped member, and the second member 142 is a leaf spring. However, the second member 142 is not limited to this as long as the second member 142 can be biased toward the first member 141. For example, the 2nd member 142 may be comprised from two plate-shaped members and the hinge which connects these plate-shaped members, and the urging | biasing member may be comprised from the spring which gives urging | biasing force to two plate-shaped members. . The second member 142 has an insertion hole 143 into which the first member 141 can be inserted. The spring is incorporated in a hinge, for example, and is biased in a direction in which the two plate-like members are flush with each other. In this case, the lowering restricting portion 120 is raised to the bottom surface portion 10d side to be in a non-use state, and the second member 142 is operated to be bent so as to resist the urging force of the spring. Then, using the restoring force to return the spring to the original state, the second member 142 is changed from the bent state to the same state, and the first member 141 is locked in the insertion hole 143 of the second member 142.
In the above embodiment, the holding unit 140 includes a biasing member 145 that biases the second member 142 toward the locking state with the first member 141 in addition to the first member 141 and the second member 142. ing. However, the first member 141 itself may have an urging force, for example, an elastic member. In this case, the holding unit 140 can be configured by the first member 141 and the second member 142.

(4)
In the above embodiment, the second member 142 is formed with the insertion hole 143 penetrating the second member 142. However, the insertion hole 143 may be a recess formed in the second member 142 without passing through the second member 142. The first member 141 is locked in the concave portion of the second member 142 and holds the lowering restricting portion 120 in a non-use state.

(5)
In the above embodiment, since the right swing arm 30a has the contact portion 31a, excessive swing of the right swing arm 30a forward is restricted. Unlike the right swing arm 30a, the left swing arm 30b does not have the contact portion 31a. However, the right swing arm 30a and the left swing arm 30b may have the same configuration, and each may be provided with a contact portion 31a. Further, the left swing arm 30b may have a contact portion 31a, and the right swing arm 30a may have no contact portion 31a.

(6)
In the above embodiment, the hydraulic cylinders 11 and 27 are used as the cylinders, but separate cylinders such as electromagnetic cylinders may be used.
(7)
In the above embodiment, as a harvesting machine, a normal combine harvester for harvesting crops such as rice and wheat has been described as an example. It can also be applied to various harvesting machines including self-removing combine harvesters.

3: Harvesting unit 9: Reaping processing unit 10: Feeder 11: Hydraulic cylinder 11a: Cylinder tube 11b: Piston rod 120: Lowering restricting unit 140: Holding unit 141: First member 142: Second member

Claims (3)

Traveling aircraft,
A harvesting portion provided in front of the traveling machine body and supported by the traveling machine body so as to be vertically swingable between a raised position and a lowered position;
It has a cylinder tube and a piston rod, the end on the cylinder tube side is supported by the traveling machine body, the end on the piston rod side is supported by the harvesting unit, and the harvesting unit is swung up and down by expansion and contraction. A cylinder to be
In a state of being positioned above the cylinder between the harvesting unit and the traveling machine body, the harvesting unit is supported by the harvesting unit so as to be able to swing up and down, and is lifted to a non-use state along the back part of the harvesting unit. A lowering restricting portion capable of changing the posture to a use state in which the harvesting portion and the cylinder tube of the cylinder in the extended state are operated to restrict the contraction of the cylinder;
A holding part for holding the lowering restricting part in the non-use state,
The holding part is provided in one of the harvesting part and the lowering restriction part, and intersects the moving direction of the free end part of the lowering restriction part when the lowering restriction part starts to descend from the non-use state. A first member extending along the other side of the harvesting part and the lowering restriction part, and can be switched between a locking state locked to the first member and a locking release state not locked to the first member. A harvesting machine comprising: a second member, and a biasing member that biases the second member toward the locked state. The second member and the biasing member are configured by a leaf spring,
A locking hole is formed in the plate-like surface of the second member,
The harvester according to claim 1, wherein the first member is a rod-like member that can be locked in the locking hole. The first member is provided in the harvesting part,
The harvesting machine according to claim 1 or 2, wherein the second member is provided in the lowering restricting portion.

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