CN110476559B

CN110476559B - Seedling planting device

Info

Publication number: CN110476559B
Application number: CN201910831365.1A
Authority: CN
Inventors: 竹内宏行
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2014-06-09
Filing date: 2015-03-31
Publication date: 2022-07-05
Anticipated expiration: 2035-03-31
Also published as: JP2015231342A; CN114375657A; CN110476559A; CN105284255A; CN105284255B; CN114375657B; JP6395454B2

Abstract

A seedling planting device having: a seedling feeder which is moved by a seedling transverse feeding shaft; and a connecting body which connects the seedling feeding body and the seedling carrying platform in a linkage way and can transfer the seedling carrying platform by the seedling feeding body. In the seedling planting device, one end side of a connecting body (68) is detachably connected with a connecting seat part (83) arranged on a seedling feeding body (62). Feed shaft covers (80) for covering the seedling transverse feed shafts (61) are attached to cover locking parts (81) provided at both ends of the seedling feed body (62). The length (L1) of the distance (D) between the cover locking part (81) and the connecting seat part (83) in the moving direction of the seedling feeder is longer than the length (L2) of the cover locking part (81) in the moving direction of the seedling feeder. According to the present invention, the connecting body can be easily attached to and detached from the seedling feeder.

Description

Seedling planting device

The present application is a divisional application of the following applications:

application date of the original application: 31/03/2015

Application No. of the original application: 201510147535.6

The invention name of the original application: seedling planting device

Technical Field

The invention relates to a seedling planting device.

Background

Conventionally, there is a seedling planting device as shown in patent document 1, for example. In this seedling planting apparatus, the machine frame is composed of a main frame long in the machine lateral direction, a feed box connected to the main frame, and the like. The feed box accommodates a transmission mechanism for distributing and transmitting the driving force of the input shaft to the seedling planting mechanism, the seedling transverse feeding device as a seedling carrying table transverse feeding driving mechanism, and the seedling longitudinal feeding device as a seedling longitudinal driving mechanism.

In this seedling planting device, have: the seedling-feeding mechanism comprises a seedling-carrying platform transverse feeding shaft which is extended from a feeding box and is used as a seedling transverse feeding shaft, and a transfer body which is used as a seedling feeding body and is externally embedded on the seedling-carrying platform transverse feeding shaft, wherein the transfer body is reciprocated and transferred by the action of a transverse feeding spiral groove arranged on the seedling-carrying platform transverse feeding shaft and a transverse feeding cam mechanism consisting of a convex part arranged on the transfer body through the rotary driving of the seedling-carrying platform transverse feeding shaft, and the transfer body is used for transversely transferring the seedling-carrying platform through a connecting body consisting of a connecting rod.

Conventionally, there is a seedling planting device as shown in patent document 2, for example. In this seedling planting device, have: a rotary case as a rotary body; a planting claw supporting box which is a pair of planting arms and is respectively and rotatably arranged at two parts of the rotating box; and a connecting rod which is installed across the support shafts relatively rotatably supported by the pair of planting claw supporting boxes, limits the rotation of each support shaft relative to the planting arm, and alternately plants one seedling planting row by the pair of planting claw supporting boxes through rotating and driving the rotating body.

The seedling planting device is provided with: the seedling pushing device includes a slide member as a seedling pushing-out lever, a coil spring as a pushing-out spring, and a swing operation member as a swing arm for returning the slide member to an inactive position as a standby position. When the slide member is operated to the push-out spring side by the coil spring, the elastic receiving member receives the swing operation member and positions the slide member at an operating position which is a push-out position.

Patent document 1: japanese laid-open patent publication No. 2013-202022

Patent document 2: japanese patent laid-open publication No. 2013-198456

A seedling planting device in which a seedling feeder is externally fitted to a seedling transverse feed shaft extending from a feed box, and the seedling transverse feed shaft is rotationally driven to reciprocate the seedling feeder and transversely transfer a seedling carrier. Further, a feed shaft cover for covering the seedling traverse shaft is attached to each of the feed box and the cover locking portion provided at one end of the seedling feeder, and the support member for supporting the extended end side of the seedling traverse shaft and the cover locking portion provided at the other end of the seedling feeder.

When the connecting seat portion and the cover locking portion of the seedling feeder are close to each other, a working space between the feed shaft cover attached to one end portion of the seedling feeder and the feed shaft cover attached to the other end portion of the seedling feeder is narrow, and a tool easily touches the feed shaft cover or the like to attach and detach the connecting body, which makes it difficult to perform work. Further, the interval between the feed box and the cover locking portion of the seedling feeder in the state where the seedling feeder is at the intermediate position, and the interval between the support member at the extended end side of the seedling transverse feed shaft and the cover locking portion of the seedling feeder become long, and a long feed shaft cover may be necessary.

In this seedling planting apparatus, when the connecting body and the seedling feeder are connected in the wrong mounting direction, even if the connecting body and the seedling support can be connected, a displacement between the seedling feeder and the seedling support may occur. For example, even if the seedling feeder is positioned at the middle position, the seedling support may not be positioned at the original middle position but may be deviated to the left or right from the original middle position.

The feeding box is divided into a feeding box main body and a cover box part along the transverse direction of the machine body. When the feed box main body and the box part are not sufficiently fastened, oil leakage such as leakage of lubricating oil in the box is likely to occur. In particular, when the feed tank has an oil bath structure, oil leakage is likely to occur.

In the seedling planting device in which the seedling push-out lever is slidably supported by the planting arm and the push-out spring for slidably operating the seedling push-out lever to the push-out position is incorporated in the planting arm, the seedling push-out lever is slidably operated inside the planting arm to be in the standby position, and therefore, it is necessary to release the air inside the planting arm along with the sliding of the seedling push-out lever.

In the case of the conventional technique in which the swing arm is received by the elastic member and the seedling push-out lever is positioned at the push-out position, the impact generated by receiving the swing arm by the elastic member is strong, and therefore, there is room for improvement.

In a seedling planting device having a pair of planting arms supported at both ends of a rotating body so as to be rotatable, and a coupling lever mounted across the support shafts of the pair of planting arms and regulating the relative postures of the pair of support shafts, the support shafts are configured to protrude outward from hub portions of the planting arms, and therefore, it is necessary to prevent muddy water or the like from entering the planting arms from between the support shafts and the hub portions.

In a seedling planting device having a feeder box connected to a main frame, the feeder box is connected to a support member provided in a traveling machine body, and therefore, it is necessary to prevent damage to the feeder box due to a load applied to the feeder box. Further, when a member such as a rod guide is attached to the feed box, it is necessary to stably support the member.

Disclosure of Invention

Problems to be solved by the invention

The invention aims to provide a seedling planting device which comprises the following components: a seedling planting device with a connecting body easy to assemble and disassemble with the seedling feeding body; a seedling planting device capable of preventing the error connection of the connection body and the seedling feeding body; a seedling planting device which is easy to avoid oil leakage of a feeding box; a seedling planting device which can discharge the air of the planting arm in a favorable state; a seedling planting device with a seedling push-out rod which is not easy to generate positioning impact; the seedling planting device can effectively prevent muddy water from entering the planting arms; the seedling planting device with firm feeding box and firm part support is obtained.

Means for solving the problems

The seedling planting device of the invention 1 is provided with:

a seedling transverse feeding shaft which is extended from the feeding box in a rotary driving way and the extending end side of which is relatively rotatably supported on the supporting component;

a seedling feeder body relatively rotatably supported by the seedling transverse feed shaft and slidably fitted externally on the seedling transverse feed shaft;

a transverse feed cam mechanism which is connected between the seedling feeder and the seedling transverse feed shaft and which transfers the seedling feeder to and fro by the rotating force of the seedling transverse feed shaft; and

a connecting body, one end side of which is detachably connected with a connecting seat part arranged on the seedling feeder, the other end side of which is connected with a seedling carrying platform, and the connecting body links the seedling feeder and the seedling carrying platform,

a feed shaft cover for covering the seedling transverse feed shaft is mounted across a cover locking part arranged at one end part of the seedling feeder and the feed box,

a feed shaft cover for covering the seedling transverse feed shaft is mounted across the cover locking part arranged at the other end part of the seedling feeder and the supporting member,

the length of the gap between the cover locking part at one end and the connecting seat part in the moving direction of the seedling feeder and the length of the gap between the cover locking part at the other end and the connecting seat part in the moving direction of the seedling feeder are set to be longer than the length of the cover locking part in the moving direction of the seedling feeder,

one end and the other end of the seedling feeder have: an inner cylinder part externally embedded on the seedling transverse feeding shaft; an outer tube section located outside the inner tube section and having the cover locking section; and a gap portion formed between the inner tube portion and the outer tube portion.

According to the configuration of the present invention 1, since the length of the space between the coupling seat portion and the cover locking portion in the moving direction of the seedling feeder is longer than the length of the cover locking portion in the moving direction of the seedling feeder on both the one end side and the other end side of the seedling feeder, a wide working space can be secured between the feed shaft cover attached to one end portion of the seedling feeder and the feed shaft cover attached to the other end portion of the seedling feeder, and even if the coupling body is attached to and detached from the coupling seat portion, a tool does not easily come into contact with the feed shaft cover or the like, and thus the work can be easily performed.

In order to easily avoid the contact between the feed shaft cover and the seedling transverse feed shaft, if the inner diameter of the feed shaft cover is set to be much larger than the outer diameter of the seedling transverse feed shaft, the outer diameter of the cover locking part needs to be made larger so that the feed shaft cover with a large inner diameter can be attached to the seedling feeder. Even if the outer diameter of the cover locking part is increased, a gap part is formed between the outer cylinder part with the cover locking part and the inner cylinder part externally embedded on the seedling feeding shaft, therefore, when casting the seedling feeding body, compared with the casting in a state without the gap part, the casting can be performed in a way that shrinkage holes are not easily generated due to the gap part.

Therefore, according to the invention of claim 1, even if the connecting member is removed and the seedling feeder is subjected to a work such as oiling, the tool does not easily come into contact with the feed shaft cover and the like, and therefore, the connecting member can be easily attached and detached, and the work can be efficiently performed. The inner diameter of the feed shaft cover can be enlarged to make the feed shaft cover not easy to contact with the seedling transverse feed shaft, and when casting the seedling feed body, a good finished product state without easy shrinkage cavity can be obtained.

Further, according to the present invention 1, since the length of the space between the coupling seat portion and the cover lock portion in the moving direction of the seedling feeder is longer than the length of the cover lock portion in the moving direction of the seedling feeder, the entire length of the seedling feeder in the moving direction is long. Although the entire length of the seedling feeder is long, the seedling transverse feed shaft has a length which can transfer the seedling feeder in a state that the transfer stroke of the seedling feeder is a transfer stroke which does not cause insufficient transfer of the seedling support, or in a case that the length of the inner cylinder part of the seedling feeder is longer than the length of the outer cylinder part, the distance between the cover locking part and the feed box and the distance between the cover locking part and the support member in a state that the seedling feeder is positioned at the middle position can be shortened. Therefore, the length of the feed shaft cover can be shortened, and the feed shaft cover is not easy to hang down. That is, contact with the seedling transverse feed shaft due to the hanging-down of the feed shaft cover is less likely to occur.

The seedling planting device of the invention 2 is provided with:

the length of the gap between the cover locking portion at one end portion and the connecting seat portion in the moving direction of the seedling feeder and the length of the gap between the cover locking portion at the other end portion and the connecting seat portion in the moving direction of the seedling feeder are set to be longer than the length of the cover locking portion in the moving direction of the seedling feeder.

According to the configuration of the invention 2, since the length of the space between the coupling seat portion and the cover lock portion in the moving direction of the seedling feeder is longer than the length of the cover lock portion in the moving direction of the seedling feeder on both the one end side and the other end side of the seedling feeder, a wide working space can be secured between the feed shaft cover attached to one end portion of the seedling feeder and the feed shaft cover attached to the other end portion of the seedling feeder, and even if the coupling body is attached to and detached from the coupling seat portion, a tool does not easily come into contact with the feed shaft cover or the like, and the work can be easily performed.

Therefore, according to the invention of claim 2, even if the connecting member is removed and the seedling feeder is subjected to a work such as oiling, the tool does not easily come into contact with the feed shaft cover and the like, and therefore, the connecting member can be easily attached and detached, and the work can be efficiently performed. The inner diameter of the feed shaft cover can be enlarged to make the feed shaft cover not easily contact with the seedling transverse feed shaft, and when casting the seedling feed body, a good finished product state with no easy shrinkage can be obtained.

Further, according to the invention of claim 2, since the length of the space between the coupling seat portion and the cover lock portion in the moving direction of the seedling feeder is longer than the length of the cover lock portion in the moving direction of the seedling feeder, the entire length of the seedling feeder in the moving direction is long. Although the entire length of the seedling feeder is long, the seedling transverse feed shaft has a length which can transfer the seedling feeder in a state that the transfer stroke of the seedling feeder is a transfer stroke which does not cause insufficient transfer of the seedling support, or in a case that the length of the inner cylinder part of the seedling feeder is longer than the length of the outer cylinder part, the distance between the cover locking part and the feed box and the distance between the cover locking part and the support member in a state that the seedling feeder is positioned at the middle position can be shortened. Therefore, the length of the feed shaft cover can be shortened, and the feed shaft cover is not easy to hang down. That is, contact with the seedling transverse feed shaft due to the hanging-down of the feed shaft cover is less likely to occur.

The seedling planting device of the invention 3 is provided with:

a seedling transverse feed shaft which is extended from the feed box in a rotary driving manner;

a connecting body, one end side of which is connected with a connecting seat part arranged on the seedling feeder, the other end side of which is connected with a seedling carrying platform, and the connecting body links the seedling feeder and the seedling carrying platform,

the connecting seat part and the connecting body are connected by a pair of connecting bolts arranged along the circumferential direction of the seedling transverse feeding shaft at one end side of the connecting seat part in the moving direction of the seedling feeding body and a pair of connecting bolts arranged along the circumferential direction of the seedling transverse feeding shaft at the other end side of the connecting seat part in the moving direction of the seedling feeding body,

the arrangement interval of the pair of connecting bolts at the one end side in the circumferential direction of the seedling transverse feed shaft is different from the arrangement interval of the pair of connecting bolts at the other end side in the circumferential direction of the seedling transverse feed shaft.

According to the structure of the invention 3, when the coupling body is coupled to the coupling seat portion in the designed attachment direction, the arrangement interval of the coupling bolts of the coupling seat portion and the arrangement interval of the coupling bolts of the coupling body are matched, and the coupling body can be coupled to the coupling seat portion. However, if the connecting body is connected to the connecting seat section in a mounting direction different from the designed mounting direction, the arrangement interval of the connecting bolts in the connecting seat section and the arrangement interval of the connecting bolts in the connecting body are different from each other, and the connecting body cannot be connected to the connecting seat section.

Therefore, according to the present invention 3, it is possible to prevent the connecting body from being connected to the seedling feeding body in an incorrect mounting direction, and the seedling stage can be moved back and forth within an appropriate movement range, so that the seedlings can be appropriately supplied to the seedling planting mechanism.

The seedling planting device of the invention 4 is that,

comprises a feeding box, the feeding box is inputted with driving force from a traveling machine body and distributes and transmits the inputted driving force to a plurality of seedling planting mechanisms,

the feed box is configured to be an oil bath structure for storing lubricating oil and is configured to be divided into a feed box main body and a cover box part along the transverse direction of the machine body,

a coupling flange portion provided at each of peripheral edge portions of the feed box main body and the lid box portion, the feed box main body and the lid box portion being coupled to each other by fastening and coupling them by a plurality of coupling bolts arranged in a circumferential direction of the coupling flange portion,

a metal gasket is interposed between the pair of coupling flange portions to be tightly coupled,

each of the coupling flange portions has: a circular arc flange portion in a circular arc shape as viewed in the joining direction; and a plurality of bolt holes arranged in the circumferential direction of the coupling flange portion and positioned at the arc flange portion,

the arrangement pitch of the plurality of bolt holes located in each of the arc-shaped flange portions in the circumferential direction of the connecting flange portion is set to be: a straight line passing through centers of a pair of adjacent ones of the plurality of bolt holes is located between the pair of bolt holes within a width of the circular arc flange portion in the inside-outside direction of the feed box.

When the arrangement pitch of the plurality of bolt holes positioned in the circular arc flange portion in the circumferential direction of the connecting flange portion is increased, a straight line passing through the centers of a pair of adjacent bolt holes among the plurality of bolt holes passes through a portion extending from the circular arc flange portion to a position other than the lateral width thereof between the pair of bolt holes. When the plurality of bolt holes positioned in the circular-arc flange portion are arranged at a narrow pitch in the circumferential direction of the connecting flange portion, a straight line passing through the centers of a pair of adjacent bolt holes among the plurality of bolt holes passes through a portion positioned within the lateral width of the circular-arc flange portion between the pair of bolt holes. In the circular-arc flange portion, as the arrangement pitch of the plurality of bolt holes in the circumferential direction of the connecting flange portion becomes narrower, more bolt holes can be provided within a range in which the length in the circumferential direction of the connecting flange portion is constant.

That is, according to the configuration of the present invention 4, a large number of bolt holes are formed in the circular arc flange portion and arranged in the circumferential direction of the coupling flange portion, and the coupling flange portion of the feed box body and the coupling flange portion of the lid box portion can be coupled to each other by a large number of coupling bolts, so that the sealing function of the metal gasket can be exhibited satisfactorily without causing insufficient fastening.

Therefore, according to the present invention 4, although the feed tank is configured to have an oil bath structure and the lubricating oil is easily swirled in the tank, the gap between the feed tank main body and the cover tank portion can be sealed with high accuracy, and oil leakage can be avoided.

The seedling planting device of the invention 5 is,

the feeding box is divided into a feeding box main body and a cover box part along the transverse direction of the machine body,

That is, according to the configuration of the invention 5, a large number of bolt holes arranged in the circumferential direction of the coupling flange portion can be provided in the circular arc flange portion, and the coupling flange portion of the feed box main body and the coupling flange portion of the lid box portion can be coupled by a large number of coupling bolts, so that insufficient fastening is not caused.

Therefore, according to the invention of claim 5, the space between the feed tank main body and the cover tank can be sealed with high accuracy, and oil leakage can be avoided.

The seedling planting device of the invention 6 is provided with:

a planting arm, the top end side of the seedling planting claw of which is driven to rotate between a seedling carrying platform and the lower part of the seedling carrying platform, the seedling planting claw is used for taking seedlings from the seedling carrying platform, and the taken seedlings are descended and conveyed to the ground for planting;

a seedling pushing-out lever supported on the planting arm to be slidably operated to a seedling pushing-out position and a standby position, and configured to push out the seedling from the seedling planting claw;

a push-out spring which is internally installed in a cylindrical box part, is arranged on the wall part of the planting arm in a state of being expanded out of the planting arm, and slides the seedling push-out rod to the push-out position;

an air release hole formed in a portion of the wall portion adjacent to the cylindrical tank portion; and an air escape plug installed at the air escape hole to allow air to escape,

the air release plug has: an installation screw portion installed on the screw portion provided in the air escape hole; and a knob-shaped operation portion for rotating the air release plug.

According to the structure of the present invention as set forth in claim 6, since the air release plug is mounted on the planting arm by the engagement of the screw portion of the air release hole and the mounting screw of the air release plug, the air release plug does not fall off by the air pressure generated by the driving vibration of the planting arm and the sliding of the seedling push-out lever, the air release plug can be firmly mounted, and the air generated along with the sliding of the seedling push-out lever can be released by the air release action of the air release plug.

Since the air release plug is mounted in the air release hole formed in a portion adjacent to the cylindrical box portion that is blown out of the planting arm, the air release plug is adjacent to the cylindrical box portion, and the cylindrical box portion has a protective function of protecting the air release plug. Even if the air release plug is adjacent to the cylindrical box portion, the knob-shaped operation portion can be easily operated to rotate the mounting screw portion.

Therefore, according to the present invention as described in claim 6, the air can be released with the sliding of the seedling push-out lever to smoothly operate the seedling push-out lever, and the air release plug can be firmly attached by screwing without easily falling off. The air release plug can be protected by the cylindrical box portion, and can be easily attached and detached without using a tool.

The seedling planting device of the invention 7 is provided with:

a planting arm, the top end side of the seedling planting claw of which is driven to rotate between the seedling carrying platform and the lower part of the seedling carrying platform, the seedling planting claw is used for taking seedlings from the seedling carrying platform, and the taken seedlings are descended and conveyed to the soil surface for planting;

a push-out spring which slidingly operates the seedling push-out lever to a seedling push-out side;

a swing arm swingably supported on the planting arm, the swing arm returning the seedling push-out lever to the standby position against the push-out spring; and

an elastic body supported on the planting arm, receiving the swing arm and positioning the seedling push-out lever at the seedling push-out position when the seedling push-out lever is operated to a seedling push-out side by sliding,

a hollow portion that opens to a wall portion of the planting arm is formed in a portion of the elastic body on a side opposite to a side where the swing arm is located with respect to a stopper portion that receives a force that acts on the swing arm.

According to the structure of the invention 7, when the elastic body receives the swing arm, the portion around the hollow portion of the elastic body receives the pressing force generated by the swing arm and is pressed against the wall portion of the planting arm, and therefore, the portion around the hollow portion of the elastic body is pressed against the wall portion while being deformed, and the air in the hollow portion is sealed while being compressed, and therefore, the swing arm does not suddenly stop at a position where the swing arm hits the elastic body, but stops while being braked. That is, the elastic body is made to have an appropriate hardness, the elastic body that receives the swing arm is less likely to be worn or deformed abnormally, and the seedling push-out lever can be positioned at the push-out position while effectively preventing the occurrence of a strong stop shock of the seedling push-out lever and the swing arm.

Therefore, according to the invention of claim 7, the seedling push-out lever is operated to slide to the seedling push-out side by the spring, but the seedling push-out lever and the swing arm are not subjected to a strong stopping shock, and the inner part of the planting arm is not easily broken.

The seedling planting device of the invention 8 is,

a seedling planting mechanism for taking seedlings from a seedling stage, lowering the taken seedlings and conveying the seedlings to the ground for planting, comprising:

a rotating body that is rotationally driven around a rotating shaft center of the rotating body along a transverse direction of the machine body;

a pair of planting arms supported on both ends of the rotating body so as to be rotatable about arm rotation axes parallel to the rotation axis of the rotating body; and

a connecting rod mounted across support shafts which are relatively rotatably supported by the hub portions of the pair of planting arms, and which is connected to the support shafts so as to be relatively non-rotatable, and which restricts rotation of the support shafts relative to the planting arms,

in the pair of planting arms, provided between the hub portion and the link, respectively: a cover member provided between the support shaft and the boss portion; and a washer member that presses the cover member against the boss portion,

the cover member has: a disc portion externally fitted on the fulcrum; and a skirt portion extending from a peripheral portion of the circular plate portion toward the boss portion and covering the boss portion at an extending end side,

the gasket member has: a metal disc portion externally fitted to the support shaft; and rubber plate parts attached to both side surfaces of the circular plate part.

According to the structure of the invention 8, since the cover member is pressed against the boss portion by the washer member, the disk portion of the cover member is attached to the end portion of the boss portion, and the opening of the boss portion can be closed by the disk member. Further, the outer peripheral side of the hub portion is covered with the skirt portion, and muddy water or the like is less likely to enter between the disc portion and the hub portion. The rubber plate parts of the gasket member attached to both side surfaces of the disc part are brought into close contact with the connecting rod and the cover member to seal the gap between the connecting rod and the cover member, thereby preventing the ingress of muddy water or the like between the hub part and the support shaft.

Therefore, according to the present invention 8, the muddy water or the like is less likely to enter the planting arm from between the hub portion and the support shaft, and the damage to the inside of the planting arm is easily avoided.

The seedling planting device of the invention 9 is,

the feeding box comprises a main frame along the transverse direction of the machine body and a feeding box connected with the main frame by a connecting seat part, wherein the feeding box accommodates: the driving force input from the running machine body is distributed and transmitted to the transmission mechanism of the seedling planting mechanism, the transverse feeding driving mechanism of the seedling carrying platform and the longitudinal feeding driving mechanism of the seedlings; and a transverse feeding speed change mechanism for changing the driving speed of the transverse feeding driving mechanism of the seedling carrying platform,

a hub portion provided on the rear side of the body of the coupling seat portion, the hub portion projecting laterally from a lateral side portion of the feed box toward the body and supporting a shift operating shaft of the lateral feed shift mechanism slidably in the lateral direction of the body,

reinforcing ribs are provided between the coupling seat portion and the hub portion so as to project from the lateral side portions outward in the lateral direction of the body and extend in the front-rear direction of the body,

the front end side of the reinforcing rib is coupled to the coupling seat portion, and the rear end side of the reinforcing rib is coupled to the boss portion.

According to the structure of the invention 9, the boss portion and the coupling seat portion are mutually reinforced by the coupling of the reinforcing ribs along the front-rear direction of the machine body in the vicinity of the rear of the main frame, and therefore, the feed box can be made to have a strong strength against a bending force in the front-rear direction from the main frame.

Therefore, according to the present invention 9, even though it is a simple structure in which only the reinforcing ribs are provided, it is possible to obtain a seedling planting device having a strong body structure by utilizing the excellent strength of the feeding box.

The seedling planting device of the invention 10 is,

the feeding box comprises a main frame along the transverse direction of the machine body and a feeding box connected with the main frame by a connecting seat part, wherein the feeding box accommodates: the driving force input from the running machine body is distributed and transmitted to the transmission mechanisms of the seedling planting mechanism, the seedling carrying platform transverse feeding driving mechanism and the seedling longitudinal feeding driving mechanism,

a pair of upper and lower sensor mounting portions protruding from lateral side portions of the feed box in a lateral direction of the machine body and having an inclination sensor mounted thereon by a connecting bolt,

a reinforcing rib is provided between the pair of upper and lower sensor mounting base portions so as to protrude outward in the lateral direction of the machine body from the lateral side portion,

the upper end side of the reinforcing rib is coupled to the upper sensor mounting seat portion of the pair of upper and lower sensor mounting seat portions, and the lower end side of the reinforcing rib is coupled to the lower sensor mounting seat portion of the pair of upper and lower sensor mounting seat portions.

The structure according to the present invention 10 is a structure in which: the inclination sensor is supported by a pair of upper and lower sensor mounting portions which are positioned above a portion connected to a main frame in the feed box along the transverse direction of the machine body and are less likely to be deformed in a direction inclined to the left and right by the supporting action of the main frame. Further, the upper and lower pair of sensor mounting portions are coupled by the reinforcing rib along the vertical direction of the body, and thus are reinforced with each other, so that relative displacement in the vertical direction of the body is not easily generated between the upper and lower pair of sensor mounting portions, and therefore, the tilt sensor can be supported in a state in which it is easy to avoid the detection operation of the tilt sensor due to deformation of the support structure.

Therefore, according to the present invention 10, although the sensor mounting portion is provided at an appropriate position and the structure is simple in which only the reinforcing rib is provided, the tilt sensor can be supported by the feed box in a state in which the tilt sensor is not easily detected improperly.

The seedling planting device of the invention 11 is,

has a barrel portion projecting forward of the machine body from a front surface portion of the feed box main body, and a lubricant supply passage is formed in the feed box,

a reinforcing rib is provided above the coupling seat portion so as to project from the front surface portion toward the front of the machine body between a coupling flange portion provided in the feed box main body for coupling the lid box portion and the filler cylinder portion,

one end side of the reinforcing rib is coupled to the filler cylinder portion, and the other end side of the reinforcing rib is coupled to the coupling flange portion.

According to the structure of the 11 th aspect of the present invention, since the filler cylinder portion and the coupling flange portion are mutually reinforced by the coupling of the reinforcing rib above the coupling seat portion, the feed box can be made to have a strong strength against the ground reaction force from the main frame and the load of the seedling planting device portion.

Therefore, according to the present invention 11, although the seedling planting device has a simple structure in which only the reinforcing ribs are provided, a seedling planting device having a strong body structure can be obtained by utilizing the excellent strength of the feed box.

The seedling planting device of the invention 12 is,

the feeding box comprises a main frame along the transverse direction of the machine body and a feeding box connected with the main frame by a connecting seat part, wherein the feeding box accommodates: the driving force input from the running machine body is distributed and transmitted to the transmission mechanisms of the seedling planting mechanism, the transverse feeding driving mechanism of the seedling carrying platform and the longitudinal feeding driving mechanism of the seedlings,

a hub part which is arranged to protrude from the lateral side part of the feeding box to the transverse direction of the machine body, and is used for inserting the output shaft of the transmission mechanism which is transmitted to the seedling longitudinal feeding driving mechanism along the transverse direction of the machine body and supporting the output shaft to be relatively rotatable,

reinforcing ribs are provided between the coupling seat portion and the hub portion so as to project outward in the lateral direction of the machine body from the lateral side portions,

one end side of the reinforcing rib is coupled to the coupling seat portion, and the other end side of the reinforcing rib is coupled to the boss portion.

According to the structure of the invention of claim 12, the hub portion and the connection seat portion are mutually reinforced by the connection of the reinforcing ribs, and the feed box can be made to have a strong strength capable of resisting the ground reaction force from the main frame and the load of the seedling planting device portion.

Therefore, according to the present invention 12, although the seedling planting device has a simple structure in which only the reinforcing ribs are provided, a seedling planting device having a strong body structure can be obtained by utilizing the excellent strength of the feed box.

The seedling planting device of the invention 13 is,

the feeding box is connected with the main frame by a connecting seat part, and is provided with a guide mounting part which is arranged by protruding from the lateral side part of the feeding box to the transverse direction of the machine body and is provided with a rod guide by a connecting bolt,

the lateral side portion and the lower portion of the guide mounting portion are connected to each other, and the guide mounting portion is supported from below by the stay portion.

According to the structure of the present invention according to claim 13, the feed box can be firmly supported by the guide mounting portion by the reinforcement of the stay portion, and even if a strong lever operation force is applied to the lever guide, the lever guide can be firmly supported and the displacement in the guide mounting portion is not easily caused.

Therefore, according to the present invention 13, although the structure is simple in which only the stay portion is provided, the rod guide can be supported by the feed box in a state in which the rod guide is not easily displaced.

The seedling planting device of the invention 14 is,

the feeding box comprises a main frame along the transverse direction of a machine body and a feeding box connected with the main frame by a connecting seat part, wherein the front surface part of the feeding box is provided with: a support shaft mounting part on which a relief support shaft is mounted along the front-rear direction of the machine body, the relief support shaft connecting the feed box and a support member of the traveling machine body in a relief manner; and an input hub part for inserting an input shaft along the front and rear direction of the machine body and supporting the input shaft to be relatively rotatable, wherein the input shaft inputs the driving force from the traveling machine body to the feed box,

reinforcing ribs are partially joined across a feed box inner portion in the spindle mounting portion and a feed box inner portion in the input hub portion.

According to the structure of the invention according to claim 14, since the support shaft mounting portion is reinforced by the input boss portion via the reinforcing rib, the undulation support shaft can be firmly supported by the feed box, and the feed box can be supported in a smoothly undulated state by the support member of the traveling machine body.

Therefore, according to the present invention as set forth in claim 14, the seedling planting device can be connected to the traveling machine body in a smoothly undulating state.

Drawings

FIG. 1 is a side view showing the whole of a riding type rice transplanter.

Fig. 2 is a side view showing a seedling planting device.

Fig. 3 is a front view showing the seedling planting device.

Fig. 4 is a plan view showing a main part of the seedling planting device.

Fig. 5 is a sectional view showing the seedling planting device.

FIG. 6 is a longitudinal sectional side view showing the planting arm.

Fig. 7 is a sectional view showing a coupling portion of the coupling rod.

Fig. 8 is a perspective view showing the entire air release plug.

Fig. 9 is a perspective view showing the entire elastic body.

Fig. 10 is a sectional view showing the seedling stage traverse driving mechanism.

FIG. 11 is a plan view showing a seedling feeder.

FIG. 12 is a longitudinal sectional view showing a seedling feeder.

FIG. 13 is a cross-sectional view of XIII-XIII in FIG. 11.

FIG. 14 is a perspective view showing a connected body and a seedling feeder.

Fig. 15 is a sectional view of the expanded state of the feed box.

Fig. 16 is a perspective view showing the feed box and the main frame.

Fig. 17 is a front view showing the feed box.

Fig. 18 is a side view showing a circular arc flange portion of the connecting flange.

Fig. 19 is a left side view showing the front of the planting device frame.

Fig. 20 is a perspective view showing the feed box main body.

Fig. 21 is a right side view showing the front of the planting device frame.

Fig. 22 is a perspective view showing the lid box portion.

Fig. 23 is a perspective view showing the feed box main body.

Fig. 24 is a perspective view showing the feed box main body.

Description of the symbols

11 mechanism is planted to seedling

12 seedling carrying platform

15 Main frame

16 feed box

16A feed box body

16B cover box part

18 fluctuation fulcrum

22 support member

30 rotating body

30b rotary axis of rotary body

31 planting arm

31c arm rotation axis

31f wall part

31r wall part

32 planting claw

34 seedling pushing rod

35 cylindrical tank section

37 hub part

41 push-out spring

42 swing arm

44 elastomer

46 fulcrum

47 connecting rod

50 cover part

50a disc part

50b skirt part

51 washer component

51a disc part

51b rubber plate part

53 air escape hole

53a screw part

54 air escape plug

54a mounting screw portion

54b operating part

60 carry seedling platform transverse feed actuating mechanism

61 seedling transverse feed shaft

62 seedling feeding body

62a inner cylinder

62b outer cylinder part

62c hollow part

63 support member

65 transverse feed cam mechanism

68 connection body

71 seedling longitudinal feeding driving mechanism

80 feed shaft cover

81 cover locking part

83 connecting seat part

84 connecting bolt

90 transmission mechanism

92 input shaft

96 transverse feeding speed change mechanism

102 output shaft

104 variable speed operating shaft

110 connecting seat

112 input hub part

112a feed box inner part (input hub part)

113 fulcrum mounting part

113a feed box inner part (fulcrum mounting part)

114 stiffening ribs

115 oiling barrel part

115a lubricant supply passage

117 reinforcing rib

118 guide mounting seat portion

119 rod guide

121 brace part

128 hub part

129 reinforcing rib

130 sensor mounting seat part

131 inclination sensor

132 stiffening rib

137 hub part

138 stiffening ribs

140 flange part for connection

141 flange part for connection

143 metal sealing gasket

144 arc flange part

145a bolt hole

Line B

D interval

Length of L1 interval

Length of L2 cover locking part

L3 configuration space

L4 arrangement space

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a side view showing the whole of a riding type rice transplanter equipped with a seedling planting device of an embodiment of the present invention. As shown in fig. 1, the riding rice transplanter includes a traveling body, and a pair of left and right front wheels 1, 1 are provided on a front side of the traveling body, and a pair of left and right

rear wheels

2, 2 are provided on a rear side of the traveling body. A power unit 3 having an engine 3a is provided on a front side of the travel machine body, and the travel machine body is configured as an automatic travel type in which the travel machine body performs automatic travel by driving front wheels 1 and rear wheels 2 with a driving force from the engine 3 a. A riding section 7 is provided on the rear side of the travel machine body, the riding section 7 includes a driver seat 4, a steering wheel 5 for steering the front wheels 1, and a driving step 6, and the travel machine body is configured to be a riding type for riding on the riding section 7 and performing steering. At the rear of the traveling machine body, a seedling planting device 10 having six seedling planting mechanisms 11 is connected. On the front side of the traveling machine body, a pair of right and left preliminary seedling storage devices 8 are provided so as to be spaced apart on both lateral sides of the power section 3. Rear steps 9 mainly used for the operation of supplying seedlings to the seedling table 12 of the seedling planting device 10 are provided in the traveling machine body from both lateral sides to the rear side of the driver seat 4.

The seedling planting device 10 is supported by an extending end portion of a link mechanism 20, the link mechanism 20 extends rearward from the body so as to be vertically swingable, and the link mechanism 20 is operated to be swung by a lift cylinder 21 formed of a hydraulic cylinder, whereby the seedling planting device 10 is operated to be lifted and lowered into two states: a descending operation state in which the grounded float 13 located at the lower portion of the seedling planting device 10 descends to the ground to be grounded; and a rising non-operation state in which the grounded float 13 rises from the ground level.

The riding rice transplanter allows the seedling planting device 10 to perform six-row planting by lowering the seedling planting device 10 to a lowered operation state and driving the machine body.

The seedling planting device 10 will now be described.

Fig. 2 is a side view showing the seedling planting device 10. Fig. 3 is a front view showing the seedling planting device. Fig. 4 is a plan view showing the main part of the seedling planting device 10. As shown in fig. 2, 3 and 4, the seedling planting device 10 includes a planting device frame 14, and a support member 22 provided at an extending end of the link mechanism 20 is connected to a front end of the planting device frame 14. The planting device frame 14 has: a main frame 15 that is long in a body lateral direction of the traveling body (hereinafter, simply referred to as a body lateral direction); a feed box 16 connected to a middle portion of the main frame 15 in the lateral direction of the body; and three planting drive boxes 17 extending from the main frame 15 to the rear of the traveling machine body (hereinafter, simply referred to as the rear of the machine body) and arranged at intervals in the transverse direction of the machine body. As shown in fig. 16 and 19, the main frame 15 is formed of a steel pipe member having a rectangular longitudinal sectional shape.

As shown in fig. 2 and 19, the feeding box 16 and the support portion 22a provided at the lower portion of the support member 22 are connected to each other by a seesaw support shaft 18 along the front-rear direction of the machine body, which is connected to the front surface portion of the upper end side of the feeding box 16, so as to be relatively rotatable, and the planting device frame 14 is supported to the traveling machine body so as to be able to rise and fall with the axial center of the seesaw support shaft 18 along the front-rear direction of the machine body as a seesaw axial center. Therefore, even if the traveling machine body is inclined in the right and left direction due to the unevenness or the right and left inclination of the hard portion of the land, the seedling planting device 10 can be raised and lowered with respect to the traveling machine body by the grounding of the grounding float 13 with respect to the soil surface, so that the seedling planting depths by the right and left seedling planting mechanisms 11 are the same or substantially the same.

The two lateral sides of the rear end of each of the three planting driving boxes 17 support a drivable seedling planting mechanism 11. Above the front side of the planting device frame 14, a seedling stage 12 for supplying seedlings to each seedling planting mechanism 11 is provided. The seedling stage 12 is supported in an inclined posture such that the closer to the lower end side, the more rearward the body. Three grounded floats 13 are provided below the planting device frame 14 in a spaced arrangement in the lateral direction of the machine body.

The seedling planting mechanism 11 will now be explained.

Fig. 5 is a sectional view showing the seedling planting mechanism 11. As shown in fig. 2, 4, and 5, each seedling planting mechanism 11 includes: a rotating body 30 having a substantially rectangular shape when viewed from the side of the body, the rotating body 30 being supported on the lateral side of the planting drive box 17 by a rotating body support shaft 30a extending in the lateral direction of the body so as to be rotatable; and a pair of planting arms 31, wherein the planting arms 31 are respectively supported at the two ends of the rotating body 30 by arm support shafts 31a along the transverse direction of the machine body in a rotatable driving manner. As shown in fig. 6, a claw mounting portion 31b is provided at the tip end portion of each planting arm 31, and a seedling planting claw 32 is detachably mounted to the claw mounting portion 31b by a coupling bolt 32 a.

The rotating body support shaft 30a is rotationally driven by a driving force input from the feeding box 16 to the planting driving box 17, and the rotating body 30 is rotationally driven around a rotating body rotation axis 30b constituted by an axis of the rotating body support shaft 30a along the transverse direction of the machine body. The rotation of the rotating body 30 causes the pair of planting arms 31 to revolve around the rotating shaft center 30 b. The gear-type planting arm driving mechanism 33 built in the rotating body 30 is driven by the driving force of the rotating body support shaft 30a to rotationally drive the arm support shafts 31a, so that the pair of planting arms 31 are rotationally driven to rotate relative to the rotating body 30 about arm rotation axes 31c which are formed by axes of the arm support shafts 31a along the machine body transverse direction and are parallel to the rotating body rotation axes 30 b.

As shown in fig. 6, each of the pair of planting arms 31 has a seedling push-out lever 34, and the seedling push-out lever 34 is slidably supported by a lever support portion 31d located at the tip end portion. A seedling push-out operation portion 34a is provided at the tip end portion of the seedling push-out lever 34. The seedling push-out lever 34 is slidably operated parallel or substantially parallel to the seedling planting claw 32 by a lever operating mechanism 40 having a push-out spring 41 and the like provided inside the planting arm 31 to two positions: the seedling push-out operation part 34a is located at a seedling push-out position on the tip side of the seedling planting claw 32; and the seedling push-out operation part 34a retreats from the seedling push-out position to the standby position on the base end side of the seedling planting claw 32. When the seedling push-out lever 34 is operated to the seedling push-out position, the root of the seedling held by the tip end portion of the seedling planting claw 32 is pushed by the seedling push-out operation portion 34a, and the seedling is pushed out from the seedling planting claw 32. When the seedling push-out lever 34 is operated to the standby position, seedlings can be taken out and held by the tip end portions of the seedling planting claws 32.

Therefore, in each seedling planting mechanism 11, the rotating body 30 is rotationally driven, so that the tip end sides of the seedling planting claws 32 of the pair of planting arms 31 are rotationally moved between the lower end side of the seedling stage 12 and the ground surface, and the seedling planting claws 32 of the pair of planting arms 31 alternately perform the following seedling planting motions: a part of the seedlings are taken out from the lower end of the cluster seedlings placed on the seedling stage 12 as seedlings, the taken-out seedlings are held, lowered to the ground, planted in soil, raised after planting, and returned to the lower end side of the seedling stage 12.

Each seedling planting mechanism 11 is configured to operate the lever operating mechanism 40 in accordance with the seedling planting movement, and when the seedling planting claw 32 plants a seedling, the seedling push-out lever 34 is operated to the push-out position to push out the seedling from the seedling planting claw 32 into the soil portion, and when the seedling planting claw 32 finishes the seedling planting and ascends, the seedling push-out lever 34 is operated to return to the standby position to prevent the seedling planting claw 32 from lifting up the seedling, and then, before the seedling planting claw 32 plants the next seedling, the seedling push-out lever 34 is held at the standby position to enable the seedling planting claw 32 to take out and hold the seedling.

The lever operating mechanism 40 will now be described in detail.

As shown in fig. 5 and 6, the lever operating mechanism 40 includes a push-out spring 41 provided inside the planting arm 31, a swing arm 42, an operating cam 43, and an elastic body 44.

A cylindrical box portion 35 is provided on the wall portion 31r on the rear side of the planting arm 31 in a state of bulging outward of the planting arm. The push-out spring 41 is housed in the cylindrical box portion 35 in a state of being interposed between the spring seat portion 34b and the bulging-side end portion 35a of the cylindrical box portion 35, and the spring seat portion 34b is provided on the base end side of the seedling push-out lever 34. The push-out spring 41 pushes the spring support portion 34b of the seedling push-out rod 34 with the bulging-side end portion 35a of the cylindrical box portion 35 as a reaction point, thereby sliding the seedling push-out rod 34 to the seedling push-out side.

The swing arm 42 is swingably supported on left and right side wall portions of the planting arm 31 via a support shaft 42 a. The leading end portion of the swing arm 42 and the seedling push-out lever 34 are linked by a link member 45. The operated arm portion 42b extends from the base of the swing arm 42 toward the operating cam 43. The planting arm 31 swings around the arm rotation axis 31c relative to the rotating body 30 in accordance with the seedling planting movement of the seedling planting mechanism 11, and the operated arm 42b moves around the operating cam 43 to be positioned on the cam peripheral surface 43a of the operating cam 43 or to be separated from the cam peripheral surface 43 a.

Therefore, the lever operating mechanism 40 slides the seedling push-out lever 34 to the push-out position and the standby position by the swing arm 42 and the push-out spring 41 which are swing-operated by the operating cam 43, and maintains the operation of the seedling push-out lever 34 to the standby position.

That is, when the seedling planting claw 32 plants a seedling, the operated arm 42b is separated from the cam peripheral surface 43a because the planting arm 31 rotates with respect to the rotating body 30, and the swing arm 42 is not supported by the operating cam 43, so that the push-out spring 41 swings the swing arm 42 about the pivot shaft 42a, and the seedling push-out lever 34 is slidingly operated to the push-out position.

As the seedling planting claw 32 finishes planting and rises, the planting arm 31 rotates with respect to the rotating body 30, so that the operated arm 42b is mounted on the cam circumferential surface 43a, and the swing arm 42 is operated by the swing of the operating cam 43, whereby the swing arm 42 returns the seedling push-out lever 34 to the standby position against the elastic force of the push-out spring 41.

During the period from the completion of seedling planting by the seedling planting claw 32 to the next seedling planting, the operated arm 42b is positioned on the cam circumferential surface 43a, and the operating cam 43 maintains the state of swinging the swing arm 42 against the elastic force of the push-out spring 41, so that the swing arm 42 maintains the seedling push-out lever 34 at the standby position against the elastic force of the push-out spring 41.

Fig. 9 is a perspective view showing the entire elastic body 44. As shown in fig. 6, the elastic body 44 is fitted and held at the base 44a thereof inside the support portion 36, and the support portion 36 is provided on the wall portion 31f on the front side of the planting arm 31. The annular ridge 44b protruding from the outer peripheral surface of the base 44a is elastically deformed by the clamping of the clamping portion 36, so that the support portion 36 is firmly supported.

The elastic body 44 has a stopper 44c protruding from the support portion 36 toward the swing arm side, and when the seedling push-out lever 34 is slid by the push-out spring 41, a positioning portion 42c provided on the swing arm 42 is received by the stopper 44c, and the seedling push-out lever 34 is positioned at the push-out position.

A hollow portion 44d is provided in the elastic body 44 at a portion on the opposite side of the stopper portion 44c from the swing arm 42. The hollow portion 44d is formed in a shape opening toward the wall portion 31 f. The elastic body 44 effectively relaxes the stopping shock of the seedling push-out lever 34 and the swing arm 42, and positions the seedling push-out lever 34 at the push-out position.

That is, when the elastic body 44 receives the swing arm 42 by the stopper 44c, the portion around the hollow portion in the elastic body 44 is pressed against the wall portion 31f by the pressing force of the swing arm 42, the portion around the hollow portion is deformed and pressed against the wall portion 31f, and the air in the hollow portion 44d is compressed and sealed. Thus, the swing arm 42 does not suddenly stop at a position where it hits the stopper 44c, but is braked by elastic deformation of the hollow portion, and stops after deformation of the portion around the hollow portion.

The support shaft 46 supporting the operation cam 43 so as not to be relatively rotatable is relatively rotatably supported by a boss portion 37 provided on the planting arm 31, and the operation cam 43 is configured to be rotatable with respect to the planting arm 31 about the same axis as the arm rotation axis 31c, that is, the axis of the support shaft 46. However, the rotation of the operating cam 43 with respect to the planting arms 31 is restricted by the connecting rod 47 provided across the pair of planting arms 31, and the swing arm 42 can be swung as predetermined by the operating cam 43.

That is, the connecting rod 47 is attached so as to straddle an end 46a of the support shaft 46 of one planting arm 31 projecting outward from the hub 37 and an end 46a of the support shaft 46 of the other planting arm 31 projecting outward from the hub 37, and is prevented from coming off by a nut 48 (cap nut) attached to each support shaft 46. As shown in fig. 7, the end 46a of each support shaft 46 is formed in a rectangular shape in longitudinal section, and the mounting hole of the link lever 47 for the support shaft 46 is formed in a rectangular shape similar to the longitudinal shape in section of the end 46a of the support shaft 46, so that the link lever 47 is linked to each support shaft 46 so as not to be relatively rotatable.

Therefore, the connecting lever 47 connects the support shafts 46 of the pair of planting arms 31 to be relatively non-rotatable, and thereby the rotation of the support shafts 46 with respect to the planting arms 31 is regulated in the pair of planting arms 31, and the operation cam 43 is regulated not to rotate together with the planting arms 31.

As shown in fig. 5 and 7, in the pair of planting arms 31, a cover member 50 and a washer member 51 are interposed between the boss portion 37 and the connecting rod 47, respectively, so that muddy water or the like is prevented from entering between the boss portion 37 and the support shaft 46.

That is, the lid member 50 includes: a disc portion 50a fitted over the fulcrum 46; and a skirt portion 50b extending from the peripheral portion of the circular plate portion 50a toward the boss portion 37. The washer member 51 presses the cover member 50 against the boss portion 37 by a fastening force of the nut 48 applied through the coupling rod 47. Thus, the disc portion 50a of the lid member 50 is attached to the end portion of the boss portion 37, the opening of the boss portion 37 is sealed by the disc portion 50a, and the skirt portion 50b covers the boss portion 37, so that the muddy water is less likely to enter between the disc portion 50a and the boss portion 37 due to the skirt portion 50 b.

The washer member 51 has: a metal disk part 51a fitted to the support shaft 46; and rubber plate portions 51b attached to both side surfaces of the circular plate portion 51a, wherein the rubber plate portions 51b are brought into close contact with the connecting rod 47 and the lid member 50 by tightening force of the nuts 48 applied through the connecting rod 47, thereby sealing a gap between the connecting rod 47 and the lid member 50.

A washer 52 with rubber is interposed between the nut 48 and the coupling rod 47. The rubber gasket 52 includes: a metal disc portion externally fitted to the support shaft 46; and rubber plate portions attached to both side surfaces of the circular plate portion, and the rubber plate portions are brought into close contact with the nuts 48 and the connecting rods 47 by the fastening force of the nuts 48, thereby sealing the space between the nuts 48 and the connecting rods 47.

An air release hole 53 is provided in the planting arm 31 at a position adjacent to the cylindrical box portion 35, and an air release plug 54 is attached to the air release hole 53, so that air can be released from the inside of the planting arm 31 as the seedling push-out lever 34 is slid to the standby position.

Fig. 8 is a perspective view showing the entire air release plug 54. As shown in fig. 6 and 8, the air release plug 54 includes: a male screw thread portion 54a provided on one end side; and a pinch-shaped operation portion 54b provided on the other end side. The air escape plug 54 is integrally formed of a molded resin material.

That is, the air release plug 54 can be attached to the air release hole 53 by rotating the entire air release plug 54 by the operating portion 54b to rotate the screw portion 54a, and attaching the screw portion 54a to the internally threaded screw portion 53a provided in the air release hole 53, and the air release plug 54 can be removed from the air release hole 53 by detaching the screw portion 54a from the screw portion 53a of the air release hole 53.

In a state where the air release plug 54 is attached to the air release hole 53, a gap is formed between the screw portion 54a of the air release plug 54 and the screw portion 53a of the air release hole 53, and the gap is used as an air inlet/outlet flow path, so that air is released to the outside of the planting arm 31 and air is sucked to the inside thereof in accordance with the sliding operation of the seedling push-out lever 34.

Now, the supply of the seedling from the seedling stage 12 to the seedling planting mechanism 11 will be described.

As shown in fig. 2, the seedling table 12 has six seedling placing sections for placing the clustered seedlings supplied to the six seedling planting mechanisms 11 in a row in the transverse direction of the machine body. The seedling stage 12 is supported to be slidable in the lateral direction of the body by a guide rail 55 and a seedling stage support frame 56, the guide rail 55 is provided above the planting drive box 17, and supports the lower end side of the seedling stage 12 to be long in the lateral direction of the body, and the seedling stage support frame 56 is provided upright from the main frame 15 to be supported on the upper end side of the seedling stage 12. The seedling table support frame 56 has: a support frame 56a that is spanned on the upper end sides of the pair of left and right column parts and extends along the transverse direction of the machine body; and support rollers 56b rotatably supported by the support arms at a plurality of positions of the support frame 56 a. The seedling stage support frame 56 is configured such that the inside of an upper rail 57 is supported by a plurality of support rollers 56b, and the upper rail 57 is fixed to the back surface side of the seedling stage 12 and has a U-shaped vertical cross section that opens downward.

The seedling stage 12 is configured to be reciprocated in the transverse direction of the machine body in conjunction with the seedling planting movement of the seedling planting mechanism 11 by a seedling stage transverse feed driving mechanism 60 provided across the feed box 16 and the lower end side of the seedling stage 12. That is, the seedling stage 12 transfers the tufted seedlings of the respective seedling placement sections in the transverse direction of the body with respect to the seedling planting mechanism 11 so that the seedling planting mechanism 11 takes out a part of the tufted seedlings placed on the seedling placement sections from the lower end portions thereof as planted seedlings at the seedling take-out openings provided in the guide rails 55, and the taking out of the seedlings by the seedling planting mechanism 11 is performed sequentially from one end side of the lower end portions of the tufted seedlings in the transverse direction to the other end side.

As shown in fig. 2, a seedling longitudinal feed belt 70 for longitudinally feeding the clustered seedlings to the seedling planting mechanism 11 is provided at the lower end side of each seedling placing part of the seedling stage 12. When the seedling stage 12 reaches the left and right stroke ends of the horizontal transfer, each of the seedling longitudinal feed belts 70 is driven by a seedling longitudinal feed driving mechanism 71 provided across the feed box 16 and the lower end side of the seedling stage 12 to feed the tufted seedlings longitudinally to the seedling planting mechanism 11 by a length corresponding to the seedling longitudinal length of the seedlings taken out of the tufted seedlings by the seedling planting mechanism 11.

The seedling stage infeed drive mechanism 60 will now be described.

Fig. 10 is a sectional view showing the seedling stage infeed drive mechanism 60. As shown in fig. 4 and 10, the seedling stage infeed drive mechanism 60 includes: a seedling transverse feeding shaft 61 which extends from the feeding box 16 to the transverse outer side of the machine body in a rotary driving manner; and a seedling feeding body 62 supported on the seedling transverse feeding shaft 61. The extended end side of the seedling transverse feed shaft 61 is supported by a support member 63 fixed to the main frame 15 so as to be relatively rotatable. The seedling feeder 62 is relatively rotatably fitted around the seedling transverse feed shaft 61 and is supported slidably along the seedling transverse feed shaft 61.

A traverse cam mechanism 65 having a spiral transfer groove 64 formed in the peripheral surface of the seedling traverse shaft 61 is provided across the seedling traverse shaft 61 and the seedling feeder 62. The traverse cam mechanism 65 has a feed projection 66 supported on the seedling feeder 62. The feed boss 66 has a driven pawl that slidably enters the helical feed slot 64. The spiral transfer grooves 64 are provided in a continuous state on both end sides of the seedling transverse feed shaft 61: a left feeding spiral groove part for moving the driven claw to the left; and a right feed spiral groove portion for performing a right feed operation of the driven pawl.

That is, the lateral feed cam mechanism 65 reciprocates the seedling feeder 62 along the seedling lateral feed shaft 61 by the rotational force of the seedling lateral feed shaft 61 and the reciprocating transfer of the feed projection 66 via the driven claw by the spiral transfer groove 64.

The seedling feeder 62 is linked to the seedling stage 12 by a linking body 68 that is linked to an intermediate portion in the moving direction of the seedling feeder 62 and an operating member 67 provided on the back side of the seedling stage 12. The operation member 67 is fixed to a seedling stage frame 12a provided on the back surface side of the seedling stage 12.

Therefore, the seedling stage traverse driving mechanism 60 drives and rotates the seedling traverse shaft 61 by the driving force from the feed box 16, reciprocates the seedling feeder 62 along the seedling traverse shaft 61 by the operation of the traverse cam mechanism 65, and reciprocates the seedling stage 12 to the left and right by the seedling feeder 62 through the connecting body 68.

A tubular feed shaft cover 80 covering the seedling traverse feed shaft 61 is attached across one end of the seedling feeder 62 and the support member 63. A tubular feed shaft cover 80 for covering the seedling traverse feed shaft 61 is attached so as to extend over the other end of the seedling feeder 62 and the boss portion 61a of the feed box 16. The end of each feed shaft cover 80 on the side of the seedling feeder is fixed to a cover locking portion 81 provided at one end and the other end of the seedling feeder 62.

As shown in fig. 10, 11, and 12, each cover locking portion 81 of the seedling feeder 62 is formed of an annular groove formed on the outer peripheral surface of the seedling feeder 62, and is fitted with a mounting protrusion provided on the inner peripheral surface of the feed shaft cover 80, and the end of the feed shaft cover 80 is held by preventing the mounting protrusion from coming off by the fastening force of the winding tape 82.

Each feed shaft cover 80 is configured to be expandable so as to be extended by a stretching operation of the transferred seedling feeder 62 and to be shortened by a pressing operation of the transferred seedling feeder 62. Specifically, each feed shaft cover 80 is formed of a corrugated cover.

Now, a connection structure for linking the seedling feeder 62 and the seedling stage 12 together will be described in detail.

As shown in fig. 10 and 14, the connecting member 68 for linking the seedling feeder 62 and the seedling stage 12 includes: a plate-like coupling portion 68a on the side of the seedling feeder; and a seedling stage side connecting portion 68b rising from the seedling feeder side connecting portion 68 a. The connection portion 68a on the seedling feeder side is configured to be detachably connected to a connection seat portion 83 provided on the seedling feeder 62 by four connection bolts 84. The connecting portion 68b on the seedling stage side is configured to be detachably connected to the operating member 67 of the seedling stage 12 by a connecting bolt 86 along the moving direction of the seedling feeder.

Fig. 11 is a plan view showing a seedling feeder 62. FIG. 12 is a longitudinal sectional view showing a seedling feeder body 62. As shown in fig. 10, 11, and 12, the coupling seat portion 83 is disposed at a position spaced apart by a distance D from each cover locking portion 81, and is provided between the cover locking portion 81 on one end side and the cover locking portion 81 on the other end side of the seedling feeder body 62. The length L1 of the space D between the coupling seat 83 and each cover locking portion 81 in the seedling feeder moving direction is set to be longer than the length L2 of the cover locking portion 81 in the seedling feeder moving direction. Therefore, the distance between the feed shaft cover 80 attached to one end of the seedling feeder 62 and the feed shaft cover 80 attached to the other end of the seedling feeder 62 can be made larger than in a structure in which the distance D between the coupling seat 83 and the cover locking portion 81 is equal to the length of the cover locking portion 81 or a structure in which the distance D between the coupling seat 83 and the cover locking portion 81 is shorter than the cover locking portion 81.

A support hole 87 for supporting the feed projection 66 and a grease chamber 88 are opened in the coupling seat 83. The coupling portion 68a on the seedling feeder side of the coupling body 68 is formed in a shape that closes the openings of the support hole 87 and the grease chamber 88, and the coupling portion 68a on the seedling feeder side functions as a cover that closes the support hole 87 and the grease chamber 88.

The arrangement of the bolt holes 89 for the four connecting bolts 84 provided in the connecting seat portion 83 is set to the arrangement shown in fig. 11.

That is, the configuration is set such that: one pair of the four bolt holes 89 is located on one end side of the coupling seat portion 83 in the seedling feeder moving direction in the circumferential direction of the seedling traverse shaft, and the other pair of the four bolt holes 89 is located on the other end side of the coupling seat portion 83 in the seedling feeder moving direction in the circumferential direction of the seedling traverse shaft. Further, a configuration is set such that: the arrangement interval L3 in the circumferential direction of the seedling lateral feed shaft of the pair of bolt holes 89 located on one end side of the coupling seat 83 is longer than the arrangement interval L4 in the circumferential direction of the seedling lateral feed shaft of the pair of bolt holes 89 located on the other end side of the coupling seat 83.

That is, in order to connect the connection portion 68a and the connection seat portion 83 on the side of the seedling feeder of the connection body 68, the pair of connection bolts 84 are arranged at the arrangement interval L3 in the circumferential direction of the seedling lateral feed shaft on one end side of the connection seat portion 83 in the moving direction of the seedling feeder, and are attached so as to straddle the connection portion 68a and the connection seat portion 83 in this arrangement, and the pair of connection bolts are arranged at the arrangement interval L4 narrower than the arrangement interval L3 on one end side in the circumferential direction of the seedling lateral feed shaft on the other end side of the connection seat portion 83 in the moving direction of the seedling feeder, and are attached so as to straddle the connection portion 68a and the connection seat portion 83 in this arrangement.

Therefore, when the connection portion 68a is to be connected to the connection seat portion 83 in the designed attachment direction, the arrangement interval of the connection bolts 84 in the connection seat portion 83 in the circumferential direction of the seedling traverse shaft is matched with the arrangement interval of the connection bolts 84 in the connection portion 68a in the circumferential direction of the seedling traverse shaft, and the connection portion 68a can be connected to the connection seat portion 83. However, when the coupling portion 68a is to be coupled to the coupling seat portion 83 in the mounting direction opposite to the designed mounting direction, the arrangement interval of the coupling bolts 84 in the coupling seat portion 83 in the circumferential direction of the seedling transverse feed shaft is different from the arrangement interval of the coupling bolts 84 in the coupling portion 68a in the circumferential direction of the seedling transverse feed shaft, and the coupling portion 68a cannot be coupled to the coupling seat portion 83.

Fig. 13 is a cross-sectional view XIII-XIII in fig. 11. As shown in fig. 10, 12, and 13, the seedling feeder 62 is configured to have the following states: an inner cylinder part 62a fitted to the seedling transverse feed shaft 61 at one end and the other end; an outer tube 62b having a cover locking part 81; and a gap 62c formed between the inner cylinder 62a and the outer cylinder 62b and opened to the side where the feed shaft cover 80 is located. Therefore, when the seedling feeder body 62 is manufactured by casting, shrinkage cavities are less likely to occur than in a structure without the void portion 62 c.

As shown in fig. 13, the void portions 62c are formed at three locations in the circumferential direction of the seedling feeder body 62. The void parts 62c of two of the three parts located on the lower side of the seedling feeder body 62 penetrate the entire length of the outer tube part 62 b. As shown in fig. 11 and 12, the inner tube portion 62a extends longer toward the side where the feed shaft cover 80 is located than the outer tube portion 62 b.

The seedling longitudinal feed drive mechanism 71 will now be explained.

As shown in fig. 4, the seedling longitudinal feed drive mechanism 71 has: a longitudinal feed drive shaft 72 extending from the feed box 16 to the outside in the lateral direction of the machine body opposite to the side from which the seedling lateral feed shaft 61 extends; and a belt driving arm 73 swingably supported on the seedling stage 12. The extended end side of the longitudinal feed drive shaft 72 is relatively rotatably supported by a support member 74 supported by the main frame 15.

The vertical feed drive shaft 72 is rotationally driven by a drive force from the feed box 16, and rotationally drives transmission arms 75 provided on the left end side and the right end side so as not to be relatively rotatable. The belt driving arm 73 is a belt driving wheel body around which the longitudinal seedling feeding belt 70 is wound, which can be driven to each seedling placing section.

Therefore, when the seedling stage 12 reaches the end of the stroke of the horizontal transfer, the seedling longitudinal feed drive mechanism 71 drives the seedling longitudinal feed belt 70 by the contact of the drive arm 75 and the belt drive arm 73.

That is, when the seedling stage 12 reaches the end of the stroke on the left side of the lateral transfer, the belt driving arm 73 comes into contact with the left driving arm 75, the belt driving arm 73 is driven from the standby position at the set rotation angle by the left driving arm 75, and the driving force is transmitted to each belt driving wheel body to drive each seedling longitudinal feeding belt 70. When the seedling stage 12 reaches the right end of the stroke of the transverse transfer, the belt driving arm 73 comes into contact with the right driving arm 75, the belt driving arm 73 is driven from the standby position at a set rotation angle by the right driving arm 75, and the driving force is transmitted to each belt driving wheel body to drive each seedling longitudinal feeding belt 70.

As shown in fig. 15, the feeding box 16 houses a transmission mechanism 90, and the transmission mechanism 90 distributes and transmits the driving force from the engine 3 to the seedling planting mechanism 11, the seedling stage transverse feeding driving mechanism 60, and the seedling longitudinal feeding driving mechanism 71. The transmission 90 will now be described.

As shown in fig. 15, the transmission mechanism 90 has an input shaft 92, the input shaft 92 projects forward of the body from the front surface portion of the feed box 16, the driving force from the engine 3a is transmitted to the input shaft 92 by a rotary transmission shaft 91 (see fig. 1 and 19), the driving force of the input shaft 92 is transmitted to a distribution transmission shaft 95 by an input shaft gear 93 and a transmission shaft gear 94, the driving force is distributed and transmitted to a transverse feed speed change mechanism 96 and a planting distribution transmission shaft 97 from the distribution transmission shaft 95, and the driving force of a speed change output shaft 96a of the seedling transverse feed speed change mechanism 96 is distributed and transmitted to the seedling transverse feed shaft 61 of the seedling table transverse feed driving mechanism 60 and the longitudinal feed driving shaft 72 of the seedling longitudinal feed driving mechanism 71. The planting distribution transmission shaft 97 distributes and transmits the driving force from the distribution transmission shaft 95 to the three planting drive boxes 17.

The transmission from the distributing transmission shaft 95 to the planting distributing transmission shaft 97 is performed by these three gears: a transmission gear 95a provided on the distribution transmission shaft 95 so as not to be relatively rotatable; a relay transmission gear 98 meshed with the transmission gear 95 a; and output gear teeth 99 supported on the planting distribution drive shaft 97 so as not to be relatively rotatable in a state of meshing with the relay gear 98.

The transmission from the change speed output shaft 96a to the longitudinal feed drive shaft 72 is performed by four parts: a transmission gear 100 provided on the transmission output shaft 96a so as not to be relatively rotatable; an output gear 101 meshed with the transmission gear 100; an output shaft 102 provided on the output gear 101 so as not to be relatively rotatable; and a coupling shaft 103 that couples the output shaft 102 and the vertical feed drive shaft 72.

The infeed speed change mechanism 96 has four pairs of gear sets provided on the distribution transmission shaft 95 as an input shaft and the speed change output shaft 96a, and transmits the driving force of the distribution transmission shaft 95 to the speed change output shaft 96a while changing the speed of the driving force into four stages of driving forces having different rotational speeds by the four pairs of gear sets. Therefore, the traverse speed changing mechanism 96 changes the traverse speed of the seedling stage 12 by the seedling stage traverse driving mechanism 60, and changes the length of the seedlings to be taken out by the seedling planting mechanism 11 in the transverse direction of the seedling stage (transverse width direction of the tufted seedlings).

The transverse feed shift mechanism 96 has a shift operating shaft 104 penetrating a transverse side wall portion of the feed box 16, and the shift operating shaft 104 is slidably operated by a shift lever 105 (see fig. 4) to shift gears. That is, when the shift operation shaft 104 is slid, the shift key 107 is slid by the shift fork 106 extending from the shift operation shaft 104, and the shift key 107 switches the gear on the counter drive shaft side of one of the four pairs of gear sets from a state in which it is relatively rotatable with respect to the counter drive shaft 95 to a state in which it is relatively non-rotatable.

The feed box 16 will be explained.

As shown in fig. 16, 17, 19, and 21, the feed box 16 has a pair of left and right connection seat portions 110 provided at a lower portion of the front portion side, and is connected to the main frame 15 by the pair of left and right connection seat portions 110.

That is, as shown in fig. 19, the left connecting seat 110 includes: the front seat section 110a is fastened to the upper surface portion of the main frame 15 by a fastening bolt, and the rear seat section 110b is fastened to the rear surface portion of the main frame 15 by a fastening member 111, and is thereby connected to the main frame 15, with a gap therebetween, and the front seat section 110a and the rear seat section 110b are arranged in the front-rear direction. The upper end portion of the connecting member 111 is fastened to the rear seat portion 110b by a connecting bolt, and the lower end portion is fastened to the main frame 15 by a connecting bolt, thereby connecting the rear seat portion 110b and the main frame 15.

As shown in fig. 21, the right connecting seat portion 110 includes a front seat portion 110a and a rear seat portion 110b located below the front seat portion 110a, the front seat portion 110a is fastened to the upper surface portion of the main frame 15 by a connecting bolt, and the rear seat portion 110b is fastened to the rear surface portion of the main frame 15 by a connecting bolt, and is thereby connected to the main frame 15.

As shown in fig. 16, 17, and 19, the feed box 16 includes an input hub 112 and a support shaft mounting portion 113 provided on a front surface portion so as to be arranged in the vertical direction of the machine body, and the input shaft 92 is supported by the input hub 112 and the relief support shaft 18 is supported by the support shaft mounting portion 113. Specifically, the input hub unit 112 is configured to support the input shaft 92 rotatably relative to the input shaft 92 via a bearing fitted around the input shaft 92, and to pass the input shaft 92 through and be positioned inside and outside the feed box 16. As shown in fig. 16, the support shaft mounting portion 113 is configured to support the heave support shaft 18 by fastening and connecting a flange portion 18a provided at the base of the heave support shaft 18 from the front side of the body by a plurality of connecting bolts 18 b.

As shown in fig. 23, a reinforcing rib 114 is coupled across the feed box inner surface-side portion 113a of the support shaft mounting portion 113 and the feed box inner surface-side portion 112a of the input hub portion 112.

As shown in fig. 16 and 17, a filler cylinder portion 115 disposed laterally to the input boss portion 112 is provided on the front surface portion of the feed box 16. As shown in fig. 23, the filler cylinder portion 115 is formed in a hollow shape that communicates the inside and outside of the feed tank 16, and a lubricant supply passage 115a is formed along the front-rear direction of the engine body to supply lubricant from the outside to the inside of the feed tank 16. Normally, a detachable plug 116 for closing the lubricant supply passage 115a is attached to the outer end of the filler cylinder portion 115 in advance.

As shown in fig. 17 and 24, a reinforcing rib 117 is provided above the right-hand coupling seat portion 110 and between a coupling flange portion 140 provided on the feed box main body 16A and the filler cylinder portion 115 in the feed box 16 so as to protrude from the front surface portion of the feed box 16 toward the front side of the machine body. The reinforcing rib 117 is coupled to the filler cylinder portion 115 and the coupling flange portion 140.

As shown in fig. 17, 21, and 22, the feed box 16 includes a pair of upper and lower guide mount portions 118 extending from a right lateral side portion in the lateral direction of the machine body, and a rod guide 119 is supported by the pair of upper and lower guide mount portions 118. Specifically, the pair of upper and lower guide mounting portions 118 are configured to support the rod guide 119 by fastening and coupling a left mounting leg portion 119a of a pair of left and right mounting leg portions 119a provided in the rod guide 119 in the lateral direction from the body by a coupling bolt. The right mounting foot 119a is supported by the main frame 15.

The upper stay portion 120 is connected to the lower portion of the upper guide mounting portion 118, the upper portion of the lower guide mounting portion 118, and the lateral side portion of the feed box 16, the lower stay portion 121 is connected to the lower portion of the lower guide mounting portion 118 and the lateral side portion of the feed box 16, and the pair of upper and lower guide mounting portions 118 are reinforced by the upper and

lower stay portions

120, 121.

That is, the upper guide attachment seat portion 118 is supported from below by the upper stay portion 120. The lower guide attachment portion 118 is supported from above by the upper stay portion 120, and the lower guide attachment portion 118 is supported from below by the lower stay portion 121. The upper and lower guide mount portions 118 are supported by the connection of the upper stay portion 120.

The rod guide 119 guides a planting depth adjustment rod 122 (see fig. 3) for adjusting the planting depth of the seedling by the seedling planting mechanism 11 and a take-out amount adjustment rod 123 (see fig. 3) for adjusting the size of the taken-out seedling by the seedling planting mechanism 11 in the longitudinal seedling feeding direction, and holds the planting depth adjustment rod 122 and the take-out amount adjustment rod 123 at adjustment positions. The planting depth adjustment lever 122 extends from a rotation fulcrum shaft 125 (see fig. 19) of a support arm 124 (see fig. 2) for supporting the rear end side of the ground float 13 to be lifted so as not to be relatively rotatable, and swings the support arm 124 by rotating the rotation fulcrum shaft 125 to change the mounting height of the ground float 13 to the planting device frame 14. As shown in fig. 21, the rotation fulcrum shaft 125 is rotatably supported by a support member 127, and the support member 127 extends from a support portion 126 (see fig. 22) provided at a lateral side portion of the feed box 16.

As shown in fig. 17 and 19, the feed box 16 has a gear shift hub portion 128 projecting laterally from the left lateral side portion toward the machine body at the rear of the coupling seat portion 110, and the gear shift operating shaft 104 of the lateral feed speed change mechanism 96 is slidably supported by the gear shift hub portion 128. The hub unit 128 for shifting is inserted through the shift operation shaft 104 and supports the same inside and outside the feed box 16.

Reinforcing ribs 129 are provided between the hub portion 128 for speed change and the left coupling seat portion 110 so as to project laterally of the machine body from the left lateral side portion of the feed box 16. The front end side of the reinforcing rib 129 is coupled to the coupling seat portion 1120, and the rear end side of the reinforcing rib 129 is coupled to the hub portion 128 for speed change, so that the feed box 16 is reinforced by the reinforcing rib 129.

As shown in fig. 17 and 19, the feed box 16 includes a pair of upper and lower sensor mount portions 130 protruding laterally to the left of the machine body from lateral side portions on the upper end side of the feed box 16 above the coupling seat portion 110, and the tilt sensor 131 is supported by the pair of upper and lower sensor mount portions 130. Specifically, each sensor mounting seat portion 130 is configured to support the inclination sensor 131 by fastening and coupling a mounting portion 131a provided to the inclination sensor 131 from the lateral direction of the body with a coupling bolt.

A reinforcing rib 132 along the vertical direction of the machine body is provided between the pair of upper and lower sensor mounting portions 130 so as to project outward in the lateral direction of the machine body from the lateral side wall portion of the feed box 16. The upper end side of the reinforcing rib 132 is coupled to the upper sensor mounting portion 130, and the lower end side of the reinforcing rib 132 is coupled to the lower sensor mounting portion 130. The reinforcing ribs 132 improve the supporting strength of the feed box 16 with respect to the pair of upper and lower sensor mounting portions 130.

The inclination sensor 131 is configured to detect the left and right inclination of the seedling planting device 10 and output detection information to the raising and lowering operation mechanism 133 (see fig. 3). The heave operation mechanism 133 has: operating members (not shown) connected to both left and right ends of the seedling stage 12 by springs 134; and a motor 136 for operating the operation means, and controls the motor 136 based on the detection information of the inclination sensor 131, and operates the operation means to lift the descending side of the seedling stage 12, thereby suppressing the right and left inclination of the seedling planting device 10 caused by the transfer of the seedling stage 12.

As shown in fig. 17 and 21, the feeding box 16 has a boss portion 137 for vertically feeding the seedling, which is provided to protrude laterally from the lateral side portion toward the machine body, and is configured to rotatably support the output shaft 102 transmitted to the seedling vertically feeding drive mechanism 71 by the boss portion 137 for vertically feeding the seedling. More specifically, the hub unit 137 is configured to support the output shaft 102 so as to be relatively rotatable by a bearing fitted around the output shaft 102, and to support the output shaft 102 by inserting the same therethrough.

Reinforcing ribs 138 are provided between the boss 137 for feeding seedlings in the longitudinal direction and the connecting seat 110 so as to project outward in the transverse direction of the machine body from the lateral side portions of the feed box 16. One end side of the reinforcing rib 138 is coupled to the boss portion 137, and the other end side of the reinforcing rib 138 is coupled to the coupling seat portion 110. The feed box 16 is reinforced by strengthening ribs 138.

Fig. 15 is a sectional view of the expanded state of the feed box 16. As shown in fig. 15, the feed box 16 is configured to be laterally divided along the machine body into a feed box main body 16A and a cover box portion 16b that closes the opening of the feed box main body 16A by a dividing plane a, and the feed box main body 16A houses a lateral feed speed change mechanism 96 and the like in the transmission mechanism 90.

As shown in fig. 23, an annular coupling flange 140 is provided along the entire opening circumference of the feed box main body 16A, and as shown in fig. 21 and 22, an annular coupling flange 141 is provided along the entire cover box portion 16B at the circumferential edge of the cover box portion 16B, and the feed box main body 16A and the cover box portion 16B are fastened and coupled by a plurality of coupling bolts 142 arranged along the circumferential direction of the coupling flange through the coupling flange 140.

The feed box 16 is configured as an oil bath structure in which lubricating oil is stored, and a metal gasket 143 is interposed between the coupling flange 140 of the feed box body 16A and the coupling flange 141 of the cover box portion 16B.

Fig. 20, 23, and 24 are perspective views showing the feed box main body 16A. As shown in fig. 15, 20, 23, and 24, the feed box main body 16A includes: a feed box main section 16C that supports the input shaft 92 and houses the traverse speed change mechanism 96; and a planting output box part 16D extending from the feeding box main part 16C to the rear lower side of the machine body and supporting the relay transmission gear 98 and the output gear 99. The feed box main section 16C has: a left connecting seat 110; a support shaft mounting part 113 for supporting the relief support shaft 18; a hub part 61a for supporting the seedling transverse feeding shaft 61; a hub portion 128 supporting the shift operating shaft 104; a sensor mounting portion 130 and a filler barrel portion 115.

The lid box portion 16B includes: a right connecting seat 110; a guide mounting seat 118; and a boss portion 137 that supports the output shaft 102.

Now, the coupling flange 140 of the feed box main body 16A and the coupling flange 141 of the cover box portion 16B will be described.

As shown in fig. 15, 22, 23, and 24, the opening of the feed box main body 16A is formed across the feed box main portion 16C and the planting output box portion 16D, and each of the

coupling flange portions

140 and 141 has an arc flange portion 144 formed in an arc shape in the coupling direction of the

coupling flange portions

140 and 141 around the output gear 99.

In each of the

coupling flange portions

140 and 141, the circular arc flange portion 144 is provided with three bolt holes 145a out of a plurality of bolt holes 145 arranged in the circumferential direction of the coupling flange portion on the entire

coupling flange portions

140 and 141. The arrangement pitch of the three bolt holes 145a provided in the circular arc flange portion 144 in the circumferential direction of the connecting flange portion is set to the arrangement pitch shown in fig. 18. The holes 146 shown in fig. 18 are pin holes for mounting the positioning pins.

That is, the pitch is set to: a straight line B passing through the centers of a pair of adjacent bolt holes 145a of the three bolt holes 145a is positioned between the pair of bolt holes 145a within the width of the circular arc flange portion 144 in the inside-outside direction of the feed box.

That is, the arrangement pitch of the bolt holes 145a in the circular arc flange portion 144 in the circumferential direction of the connecting flange portion can be made small as compared with the case where the straight line B is offset to the inside of the feed box with respect to the circular arc flange portion 144 between the pair of bolt holes 145 a.

[ further example ]

(1) In the above-described embodiment, the example having six seedling planting mechanisms 11 is illustrated, but it may be implemented with five or less or seven or more seedling planting mechanisms 11.

(2) In the above-described embodiment, the example in which the void portion 62c is provided in the seedling feeder body 62 is illustrated, but the embodiment may be carried out without providing the void portion 62 c.

(3) In the above-described embodiment, the example in which the feed tank 16 is configured to have an oil bath structure and the metal gasket 143 is provided has been described, but instead of the oil bath structure, grease may be used as the lubricating oil instead of the metal gasket 143 to implement the sealing rubber.

(4) In the above-described embodiment, the example in which three bolt holes 145a are provided in the circular arc flange portion 144 has been described, but it is also possible to provide four or more bolt holes.

Industrial applicability

The present invention can be applied to a seedling planting device provided in a walking type rice transplanter as well as a seedling planting device provided in a riding type rice transplanter.

Claims

1. A seedling planting device, comprising:

an elastic body supported on the planting arm, receiving the swing arm and positioning the seedling push-out rod at the seedling push-out position when the seedling push-out rod is operated to the seedling push-out side by sliding,

2. The seedling planting device of claim 1,

a rotating body that is rotationally driven around a rotating axis of the rotating body along a transverse direction of the machine body;

a pair of the planting arms supported by both end portions of the rotating body so as to be rotatable about arm rotation axes parallel to the rotation axis of the rotating body; and

in a pair of the planting arms, provided between the hub part and the link respectively are: a cover member provided between the support shaft and the boss portion; and a washer member that presses the cover member against the boss portion,