JP2007159445A - Work device-linking structure for working vehicle - Google Patents

Work device-linking structure for working vehicle Download PDF

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Publication number
JP2007159445A
JP2007159445A JP2005357747A JP2005357747A JP2007159445A JP 2007159445 A JP2007159445 A JP 2007159445A JP 2005357747 A JP2005357747 A JP 2005357747A JP 2005357747 A JP2005357747 A JP 2005357747A JP 2007159445 A JP2007159445 A JP 2007159445A
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Japan
Prior art keywords
link mechanism
work
support member
work device
connecting member
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JP2005357747A
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Japanese (ja)
Inventor
Satoru Sugumoto
哲 直本
Toshio Yagisawa
俊夫 八木澤
Masaki Orimoto
正樹 折本
Yusuke Kishioka
雄介 岸岡
Takuya Okamoto
拓也 岡本
Takeshi Mukai
猛 向井
Yasuhiro Nagata
永田　　康弘
Kaori Miyazaki
かおり 宮崎
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Kubota Corp
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Kubota Corp
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Priority to JP2005357747A priority Critical patent/JP2007159445A/en
Publication of JP2007159445A publication Critical patent/JP2007159445A/en
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  • Transplanting Machines (AREA)
  • Lifting Devices For Agricultural Implements (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work device-linking structure for the working vehicle in which the connection and the detaching between the support member for the link mechanism and linking member for the working member can be done easily. <P>SOLUTION: The linking structure 39 is attached around the longitudinal shaft core in front of the working device and the retention mechanism 48 is arranged so that the linking member 39 for the working device may roll and so that the linking part 39 may be retained at a specific position to the working device. In the presence of the retaining operating mechanism 51, when the supporting member 21 for linking mechanism 3 and the linking member 39 for the work device are detached, the retaining mechanism 48 is operated in the retention mode, and when the supporting member 21 for the link mechanism 3 and the linking member 39 for the working device are connected, the retention mechanism 48 is operated in the permissive mode. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、乗用型田植機や乗用型直播機、乗用型管理機、農用トラクタ等の作業車において、機体の後部での作業装置の連結構造に関する。   The present invention relates to a connection structure of work devices at the rear of a machine body in a work vehicle such as a ride type rice transplanter, a ride type direct seeding machine, a ride type management machine, and an agricultural tractor.

作業車の一例である乗用型田植機では、例えば特許文献１に開示されているように、機体の後部にリンク機構（特許文献１の図１の６）を上下に揺動駆動自在に備えて、リンク機構の後部に支持部材（特許文献１の図１０の４７）を備え、連結部材（特許文献１の図１９，２０の４８）を、作業装置（特許文献１の図１の４）の前部の前後軸芯周りにローリング自在に備えて、リンク機構の支持部材と作業装置の連結部材とを連結及び取り外し自在に構成したものがある。これにより、リンク機構の支持部材と作業装置の連結部材とを連結した状態において、リンク機構に作業装置がローリング自在に支持される。   In a passenger type rice transplanter that is an example of a work vehicle, for example, as disclosed in Patent Document 1, a link mechanism (6 in FIG. 1 of Patent Document 1) is provided at the rear of the machine body so as to be swingable up and down. A support member (47 in FIG. 10 of Patent Document 1) is provided at the rear part of the link mechanism, and a connecting member (48 in FIGS. 19 and 20 of Patent Document 1) is connected to the working device (4 in FIG. There is a configuration in which the support member of the link mechanism and the connection member of the work device are connected to and detached from each other so as to freely roll around the front and rear axis. Thereby, in a state where the support member of the link mechanism and the connecting member of the work device are connected, the work device is supported by the link mechanism so as to be freely rollable.

リンク機構の支持部材と作業装置の連結部材とを取り外した状態において、例えば作業装置を地面に置いたりすると、連結部材が作業装置に対して前後軸芯周りにローリングすることになり、連結部材が作業装置に対して傾斜した状態になることがある。この状態においてリンク機構の支持部材と作業装置の連結部材とを連結する際、リンク機構の支持部材に対して作業装置の連結部材が傾斜した状態になっていると、リンク機構の支持部材と作業装置の連結部材との連結が行い難くなる。   In a state where the support member of the link mechanism and the connecting member of the working device are removed, for example, when the working device is placed on the ground, the connecting member rolls around the longitudinal axis with respect to the working device. It may become in a state inclined with respect to the working device. In this state, when the support member of the link mechanism and the connection member of the work device are connected, if the connection member of the work device is inclined with respect to the support member of the link mechanism, the support member of the link mechanism and the work It becomes difficult to connect the connecting member of the apparatus.

この場合、特許文献１では、連結部材と作業装置とに亘ってピン（特許文献１の図１９，２０の５１）を取り付けることにより、連結部材を作業装置に対して所定位置で保持することができるように構成している。これにより、リンク機構の支持部材と作業装置の連結部材とを連結する際に、連結部材が作業装置に対して所定位置で保持されて傾斜したりすることがないので、リンク機構の支持部材と作業装置の連結部材とを容易に連結することができる。   In this case, in Patent Document 1, the connecting member can be held at a predetermined position with respect to the working device by attaching a pin (51 in FIGS. 19 and 20 of Patent Document 1) across the connecting member and the working device. It is configured to be able to. Thereby, when connecting the supporting member of the link mechanism and the connecting member of the working device, the connecting member is not held and tilted with respect to the working device at a predetermined position. The connecting member of the working device can be easily connected.

特開２００３−１６９５１２号公報（図１，１０，１９，２０）Japanese Patent Laid-Open No. 2003-169512 (FIGS. 1, 10, 19, and 20)

特許文献１において、連結部材と作業装置とに亘ってピンを取り付けた状態で、リンク機構の支持部材と作業装置の連結部材とを連結した場合、この後に作業者はピンを取り外さなくてはならないので（ピンを取り外さないと、リンク機構に対して作業装置がローリングできない）、作業者によるピンの取り外し忘れが予想される。   In Patent Document 1, when the support member of the link mechanism and the connection member of the work device are connected in a state where the pin is attached over the connection member and the work device, the operator must remove the pin after this. (If the pin is not removed, the working device cannot be rolled with respect to the link mechanism), and it is expected that the operator forgets to remove the pin.

作業者によるピンの取り外し忘れがないとしても、リンク機構の支持部材と作業装置の連結部材とを取り外した場合に、連結部材と作業装置とに亘ってピンを取り付けたり、リンク機構の支持部材と作業装置の連結部材とを連結した場合に、ピンを取り外したりすることは、作業者にとって煩わしい作業になることがある。
本発明は作業車の作業装置連結構造において、リンク機構の支持部材と作業装置の連結部材との連結及び取り外しが容易に行えるように構成することを目的としている。 Even if the operator does not forget to remove the pins, when the support member of the link mechanism and the connection member of the work device are removed, the pin is attached over the connection member and the work device, or the support member of the link mechanism When the connecting member of the work device is connected, it may be troublesome for the operator to remove the pin.
It is an object of the present invention to provide a work device connection structure for a work vehicle so that the support member of the link mechanism and the connection member of the work device can be easily connected and detached.

［Ｉ］
（構成）
本発明の第１特徴は、作業車の作業装置連結構造において次のように構成することにある。
機体の後部にリンク機構を上下に揺動駆動自在に備えて、リンク機構の後部に支持部材を備える。連結部材を作業装置の前部の前後軸芯周りにローリング自在に備えて、リンク機構の支持部材と作業装置の連結部材とを連結及び取り外し自在に構成する。作業装置に対する連結部材のローリングを許容する許容状態及び連結部材を作業装置に対して所定位置で保持する保持状態に操作自在な保持機構を備える。リンク機構の支持部材と作業装置の連結部材とを取り外すと保持機構を保持状態に操作し、リンク機構の支持部材と作業装置の連結部材とを連結すると保持機構を許容状態に操作する保持操作機構を備える。 [I]
(Constitution)
A first feature of the present invention resides in the following configuration in a work device connection structure for a work vehicle.
A link mechanism is provided at the rear part of the machine body so as to be swingable up and down, and a support member is provided at the rear part of the link mechanism. A connecting member is provided so as to be able to roll around a front and rear axis around the front portion of the working device, and the support member of the link mechanism and the connecting member of the working device are configured to be connected and detached. A holding mechanism is provided that can be operated in a permissible state in which the connecting member is allowed to roll with respect to the working device and a holding state in which the connecting member is held in a predetermined position with respect to the working device. When the support member of the link mechanism and the connecting member of the work device are removed, the holding mechanism is operated to the holding state, and when the support member of the link mechanism and the connecting member of the work device are connected, the holding operation mechanism is operated to allow the holding mechanism. Is provided.

（作用）
本発明の第１特徴によれば、リンク機構の支持部材と作業装置の連結部材とを取り外すと、保持操作機構により保持機構が自動的に保持状態に操作されて、連結部材が作業装置に対して所定位置で保持されるのであり、作業者が保持機構を保持状態に手動で操作するようなことを行う必要はない。従って、この後にリンク機構の支持部材と作業装置の連結部材とを連結する際に、連結部材が作業装置に対して所定位置で保持されて傾斜したりすることがないので、リンク機構の支持部材と作業装置の連結部材とを容易に連結することができる。 (Function)
According to the first feature of the present invention, when the support member of the link mechanism and the connecting member of the working device are removed, the holding mechanism automatically operates the holding mechanism to the holding state, so that the connecting member moves to the working device. Therefore, it is not necessary for the operator to manually operate the holding mechanism to the holding state. Therefore, when connecting the supporting member of the link mechanism and the connecting member of the working device after this, the connecting member is held at a predetermined position with respect to the working device and does not tilt, so the supporting member of the link mechanism And the connecting member of the working device can be easily connected.

本発明の第１特徴によれば、リンク機構の支持部材と作業装置の連結部材とを連結すると、保持操作機構により保持機構が自動的に許容状態に操作されて、作業装置に対する連結部材のローリングが許容されるのであり、作業者が保持機構を許容状態に手動で操作するようなことを行う必要はない。従って、リンク機構に作業装置がローリング自在に支持された状態が支障なく得られる。   According to the first aspect of the present invention, when the support member of the link mechanism and the connecting member of the work device are connected, the holding mechanism is automatically operated to the allowable state by the holding operation mechanism, and the connecting member is rolled relative to the work device. Therefore, it is not necessary for the operator to manually operate the holding mechanism to an allowable state. Therefore, a state in which the work device is supported by the link mechanism in a freely rolling manner can be obtained without any trouble.

（発明の効果）
本発明の第１特徴によると、作業車の作業装置連結構造において、作業装置に対する連結部材のローリングを許容する許容状態及び連結部材を作業装置に対して所定位置で保持する保持状態に操作自在な保持機構を備えた場合、リンク機構の支持部材と作業装置の連結部材との連結及び取り外しに伴って、保持機構が自動的に許容及び保持状態に操作されるようになり、作業車の操作性を向上させることができた。 (The invention's effect)
According to the first feature of the present invention, in the work device connection structure of a work vehicle, the work device can be operated in an allowable state in which the connection member is allowed to roll with respect to the work device and a holding state in which the connection member is held in a predetermined position with respect to the work device. When the holding mechanism is provided, the holding mechanism is automatically operated in an allowable and holding state in accordance with the connection and removal of the support member of the link mechanism and the connection member of the work device, and the operability of the work vehicle is improved. Was able to improve.

［ＩＩ］
（構成）
本発明の第２特徴は、本発明の第１特徴の作業車の作業装置連結構造において次のように構成することにある。
作業装置を連結部材に対して所定位置に付勢する付勢状態及び付勢を停止する停止状態に操作自在な付勢機構を備える。リンク機構の支持部材と作業装置の連結部材とを取り外すと付勢機構を停止状態に操作し、リンク機構の支持部材と作業装置の連結部材とを連結すると付勢機構を付勢状態に操作する付勢操作機構を備える。 [II]
(Constitution)
The second feature of the present invention resides in the following construction in the work device connection structure for work vehicles of the first feature of the present invention.
An urging mechanism is provided that can be operated in an urging state in which the working device is urged to a predetermined position with respect to the connecting member and in a stopped state in which the urging is stopped. When the support member of the link mechanism and the connecting member of the work device are removed, the biasing mechanism is operated to stop, and when the support member of the link mechanism and the connecting member of the work device are connected, the biasing mechanism is operated to the biased state. An urging operation mechanism is provided.

（作用）
本発明の第２特徴によると、本発明の第１特徴と同様に前項［Ｉ］に記載の「作用」を備えており、これに加えて以下のような「作用」を備えている。
作業車においてリンク機構に作業装置をローリング自在に支持する場合、作業装置を所定位置（例えば水平位置）に付勢する付勢機構（例えばコイルバネ等）を備えることが多い。 (Function)
According to the second feature of the present invention, the “action” described in the preceding item [I] is provided in the same manner as the first feature of the present invention, and in addition to this, the following “action” is provided.
In a work vehicle, when a work device is supported by a link mechanism so as to be able to roll freely, an urging mechanism (eg, a coil spring) that urges the work device to a predetermined position (eg, a horizontal position) is often provided.

本発明の第２特徴によれば、作業装置を連結部材に対して所定位置に付勢する付勢状態及び付勢を停止する停止状態に操作自在な付勢機構を備えており、リンク機構の支持部材と作業装置の連結部材とを取り外すと、付勢操作機構により付勢機構が自動的に停止状態に操作される。これにより、前項［Ｉ］に記載のように、リンク機構の支持部材と作業装置の連結部材とを取り外した際に、保持操作機構により保持機構が自動的に保持状態に操作されて、連結部材が作業装置に対して所定位置で保持されることに対して付勢機構が抵抗になるようなことがない。   According to the second feature of the present invention, there is provided a biasing mechanism operable to bias the working device to a predetermined position with respect to the connecting member, and a biasing mechanism operable to stop the biasing. When the support member and the connecting member of the work device are removed, the biasing mechanism is automatically operated to be stopped by the biasing operation mechanism. As a result, as described in [I] above, when the support member of the link mechanism and the connecting member of the work device are removed, the holding mechanism is automatically operated to the holding state by the holding operation mechanism, and the connecting member However, the biasing mechanism does not become a resistance against being held at a predetermined position with respect to the working device.

本発明の第２特徴によれば、リンク機構の支持部材と作業装置の連結部材とを連結すると、付勢操作機構により付勢機構が自動的に付勢状態に操作される。これにより、前項［Ｉ］に記載のように、リンク機構の支持部材と作業装置の連結部材とを連結して、リンク機構に作業装置がローリング自在に支持された場合、作業装置が所定位置に付勢される状態を支障なく得ることができる（リンク機構の支持部材と作業装置の連結部材とを連結した状態において、付勢機構により連結部材を作業装置に対して所定位置に付勢すれば、付勢機構により作業装置が所定位置に付勢されることになる）。   According to the second feature of the present invention, when the support member of the link mechanism and the connecting member of the work device are connected, the biasing mechanism is automatically operated to the biased state by the biasing operation mechanism. Thus, as described in [I] above, when the support member of the link mechanism and the connection member of the work device are connected, and the work device is supported by the link mechanism so as to be able to roll, the work device is brought into a predetermined position. The biased state can be obtained without hindrance (if the support member of the link mechanism and the connecting member of the working device are connected, the biasing mechanism biases the connecting member to a predetermined position with respect to the working device. The working device is biased to a predetermined position by the biasing mechanism).

（発明の効果）
本発明の第２特徴によると、本発明の第１特徴と同様に前項［Ｉ］に記載の「発明の効果」を備えており、これに加えて以下のような「発明の効果」を備えている。
本発明の第２特徴によると、作業装置を連結部材に対して所定位置に付勢する付勢状態及び付勢を停止させる停止状態に操作自在な付勢機構を備え、リンク機構の支持部材と作業装置の連結部材との連結及び取り外しに伴って、付勢機構が自動的に付勢及び停止状態に操作されるように構成することにより、作業車の機能性を向上させることができた。 (The invention's effect)
According to the second feature of the present invention, the “effect of the invention” described in the preceding item [I] is provided in the same manner as the first feature of the present invention. In addition, the following “effect of the invention” is provided. ing.
According to the second feature of the present invention, the biasing mechanism that biases the working device to a predetermined position with respect to the connecting member and the biasing mechanism that can be operated in a stopped state that stops the biasing are provided, and the support member of the link mechanism It is possible to improve the functionality of the work vehicle by configuring the urging mechanism to be automatically urged and stopped along with the connection and removal of the work device from the connection member.

［ＩＩＩ］
（構成）
本発明の第３特徴は、本発明の第１又は第２特徴の作業車の作業装置連結構造において次のように構成することにある。
リンク機構の支持部材と作業装置の連結部材とを連結した状態において、リンク機構を上昇駆動すると、作業装置のローリングをロックするローリングロック機構を備える。 [III]
(Constitution)
A third feature of the present invention resides in the following configuration in the work device connection structure for a work vehicle according to the first or second feature of the present invention.
In a state where the support member of the link mechanism and the connecting member of the work device are connected, a rolling lock mechanism is provided that locks the rolling of the work device when the link mechanism is driven up.

（作用）
本発明の第３特徴によると、本発明の第１又は第２特徴と同様に前項［Ｉ］［ＩＩ］に記載の「作用」を備えており、これに加えて以下のような「作用」を備えている。
作業車では一般に、一回の作業行程が終了して機体が作業地の端部に達すると、リンク機構を上昇駆動して作業装置を地面から上昇させ、作業地の端部で機体を旋回させて次の作業行程に入る。 (Function)
According to the third feature of the present invention, the “action” described in the preceding item [I] [II] is provided in the same manner as the first or second feature of the present invention. In addition, the following “action” is provided. It has.
Generally, in a work vehicle, when one work process is completed and the aircraft reaches the end of the work area, the link mechanism is driven up to raise the work device from the ground, and the machine is turned at the end of the work area. Then enter the next work process.

本発明の第３特徴によると、リンク機構の支持部材と作業装置の連結部材とを連結した状態（リンク機構に作業装置がローリング自在に支持された状態）において、リンク機構を上昇駆動すると、ローリングロック機構により作業装置のローリングが自動的にロックされるので、前述のように作業地の端部で機体を旋回させる場合に、作業装置がローリングせず、作業地の端部で機体を安定して旋回させることができる。   According to the third feature of the present invention, when the link mechanism is driven up in the state in which the support member of the link mechanism and the connection member of the work device are connected (the work device is supported by the link mechanism in a freely rolling manner), Since the rolling of the work device is automatically locked by the lock mechanism, when the machine is swiveled at the end of the work area as described above, the work apparatus does not roll and the machine is stabilized at the end of the work place. Can be turned.

（発明の効果）
本発明の第３特徴によると、本発明の第１又は第２特徴と同様に前項［Ｉ］［ＩＩ］に記載の「発明の効果」を備えており、これに加えて以下のような「発明の効果」を備えている。
本発明の第３特徴によると、作業地の端部で機体を旋回させる場合に、作業装置がローリングせず、作業地の端部で機体を安定して旋回させることができるようになって、作業車の旋回性能を向上させることができた。 (The invention's effect)
According to the third feature of the present invention, the “effect of the invention” described in the preceding paragraphs [I] and [II] is provided in the same manner as the first or second feature of the present invention. The effect of the invention is provided.
According to the third feature of the present invention, when the airframe is turned at the end of the work place, the work device does not roll, and the airframe can be turned stably at the end of the work place. The turning performance of the work vehicle could be improved.

［ＩＶ］
（構成）
本発明の第４特徴は、本発明の第３特徴の作業車の作業装置連結構造において次のように構成することにある。
リンク機構が付勢機構を作動範囲の限界位置に操作することにより、作業装置のローリングがロックされるように、ローリングロック機構を構成する。 [IV]
(Constitution)
A fourth feature of the present invention resides in the following configuration in the work device connection structure for a work vehicle of the third feature of the present invention.
The rolling lock mechanism is configured such that the link mechanism operates the urging mechanism to the limit position of the operating range to lock the rolling of the work device.

（作用）
本発明の第４特徴によると、本発明の第３特徴と同様に前項［Ｉ］［ＩＩ］［ＩＩＩ］に記載の「作用」を備えており、これに加えて以下のような「作用」を備えている。
前項［ＩＩ］に記載のような付勢機構は一般に、作動範囲に限界位置（例えばコイルバネにおいて密着状態になるまで押圧した状態）が存在するので、付勢機構が作動範囲の限界位置に操作されると、付勢機構は作動できない状態となる。 (Function)
According to the fourth feature of the present invention, the “action” described in the preceding item [I] [II] [III] is provided in the same manner as the third feature of the present invention. In addition, the following “action” is provided. It has.
In general, the biasing mechanism as described in [II] above has a limit position in the operating range (for example, a state in which the coil spring is pressed until it is in close contact), so that the biasing mechanism is operated to the limit position of the operating range. Then, the urging mechanism cannot be operated.

本発明の第４特徴によると、前項［ＩＩＩ］に記載のローリングロック機構を備える場合に、付勢機構を作動範囲の限界位置に操作して作動できない状態とすることにより、作業装置のローリングがロックされるように、ローリングロック機構を構成しているので、付勢機構をローリングロック機構に兼用することができるのであり、付勢機構とは別に専用のローリングロック機構を備える必要がない。
本発明の第４特徴によると、既存のものであるリンク機構により、付勢機構を作動範囲の限界位置に操作するように構成しているので、リンク機構とは別に付勢機構を作動範囲の限界位置に操作する機構を備える必要がない。 According to the fourth feature of the present invention, when the rolling lock mechanism described in the preceding item [III] is provided, the urging mechanism is operated to the limit position of the operation range so that the operation device cannot be operated. Since the rolling lock mechanism is configured so as to be locked, the urging mechanism can also be used as the rolling lock mechanism, and it is not necessary to provide a dedicated rolling lock mechanism separately from the urging mechanism.
According to the fourth feature of the present invention, since the biasing mechanism is operated to the limit position of the operating range by the existing link mechanism, the biasing mechanism is set in the operating range separately from the link mechanism. There is no need to provide a mechanism for operating the limit position.

（発明の効果）
本発明の第４特徴によると、本発明の第３特徴と同様に前項［Ｉ］［ＩＩ］［ＩＩＩ］に記載の「発明の効果」を備えており、これに加えて以下のような「発明の効果」を備えている。
本発明の第４特徴によると、付勢機構とは別に専用のローリングロック機構を備える必要がない点、及びリンク機構とは別に付勢機構を作動範囲の限界位置に操作する機構を備える必要がない点により、構造の簡素化の面で有利なものとなった。 (The invention's effect)
According to the fourth feature of the present invention, the “effect of the invention” described in the preceding paragraph [I] [II] [III] is provided in the same manner as the third feature of the present invention. The effect of the invention is provided.
According to the fourth feature of the present invention, it is not necessary to provide a dedicated rolling lock mechanism separately from the urging mechanism, and it is necessary to provide a mechanism for operating the urging mechanism to the limit position of the operating range separately from the link mechanism. The lack of this became advantageous in terms of simplification of the structure.

［Ｖ］
（構成）
本発明の第５特徴は、本発明の第１〜第４特徴の作業車の作業装置連結構造のうちのいずれか一つにおいて次のように構成することにある。
リンク機構の支持部材と作業装置の連結部材とを互いに押圧するように、リンク機構の支持部材と作業装置の連結部材とを連結する連結機構を備える。 [V]
(Constitution)
The fifth feature of the present invention resides in the following configuration in any one of the working device connection structures for work vehicles of the first to fourth features of the present invention.
A connection mechanism is provided that connects the support member of the link mechanism and the connection member of the work device so as to press the support member of the link mechanism and the connection member of the work device.

（作用）
本発明の第５特徴によると、本発明の第１〜第４特徴のうちのいずれか一つと同様に前項［Ｉ］〜［ＩＶ］に記載の「作用」を備えており、これに加えて以下のような「作用」を備えている。
本発明の第５特徴によると、リンク機構の支持部材と作業装置の連結部材とを連結した状態において、連結機構によりリンク機構の支持部材と作業装置の連結部材とを互いに押圧するように構成しており、リンク機構の支持部材と作業装置の連結部材とをガタ付きなく連結することができる。 (Function)
According to the fifth aspect of the present invention, the “action” described in the preceding paragraphs [I] to [IV] is provided similarly to any one of the first to fourth characteristics of the present invention. It has the following “actions”.
According to a fifth aspect of the present invention, in a state where the support member of the link mechanism and the connection member of the work device are connected, the connection mechanism presses the support member of the link mechanism and the connection member of the work device together. Thus, the support member of the link mechanism and the connecting member of the working device can be connected without backlash.

（発明の効果）
本発明の第５特徴によると、本発明の第１〜第４特徴のうちのいずれか一つと同様に前項［Ｉ］〜［ＩＶ］に記載の「発明の効果」を備えており、これに加えて以下のような「発明の効果」を備えている。
本発明の第５特徴によると、リンク機構の支持部材と作業装置の連結部材とをガタ付きなく連結することができるようになって、リンク機構の支持部材と作業装置の連結部材との連結強度を高めることができた。 (The invention's effect)
According to the fifth feature of the present invention, the “effect of the invention” described in the preceding paragraphs [I] to [IV] is provided as in any one of the first to fourth features of the present invention. In addition, the following “effects of the invention” are provided.
According to the fifth aspect of the present invention, the support member of the link mechanism and the connection member of the work device can be connected without backlash, and the connection strength between the support member of the link mechanism and the connection member of the work device can be increased. I was able to increase.

［ＶＩ］
（構成）
本発明の第６特徴は、本発明の第５特徴の作業車の作業装置連結構造において次のように構成することにある。
リンク機構の支持部材と作業装置の連結部材との間に弾性部材を備える。 [VI]
(Constitution)
The sixth feature of the present invention resides in the following construction in the work device connection structure for work vehicles of the fifth feature of the present invention.
An elastic member is provided between the support member of the link mechanism and the connecting member of the work device.

（作用）
本発明の第６特徴によると、本発明の第５特徴と同様に前項［Ｉ］〜［Ｖ］に記載の「作用」を備えており、これに加えて以下のような「作用」を備えている。
前項［Ｖ］に記載のように、連結機構によりリンク機構の支持部材と作業装置の連結部材とを互いに押圧するように連結する場合、本発明の第６特徴によると、リンク機構の支持部材と作業装置の連結部材との間で弾性部材が押圧されることになり、弾性部材からリンク機構の支持部材及び作業装置の連結部材への押圧によって、リンク機構の支持部材と作業装置の連結部材との間のガタ付きをさらに少なくすることができる。 (Function)
According to the sixth feature of the present invention, the “action” described in the preceding paragraphs [I] to [V] is provided in the same manner as the fifth feature of the present invention. In addition to this, the following “action” is provided. ing.
As described in the preceding item [V], when the link mechanism support member and the work device connection member are connected to be pressed against each other by the connection mechanism, according to the sixth feature of the present invention, the link mechanism support member and The elastic member is pressed between the connection member of the work device, and the support member of the link mechanism and the connection member of the work device are pressed by the elastic member to the support member of the link mechanism and the connection member of the work device. It is possible to further reduce backlash between the two.

（発明の効果）
本発明の第６特徴によると、本発明の第５特徴と同様に前項［Ｉ］〜［Ｖ］に記載の「発明の効果」を備えており、これに加えて以下のような「発明の効果」を備えている。
本発明の第６特徴によると、リンク機構の支持部材と作業装置の連結部材とをガタ付きなく連結することができるようになって、リンク機構の支持部材と作業装置の連結部材との連結強度を高めることができた。 (The invention's effect)
According to the sixth aspect of the present invention, the “effects of the invention” described in the preceding paragraphs [I] to [V] are provided in the same manner as the fifth aspect of the present invention. It has an “effect”.
According to the sixth aspect of the present invention, it is possible to connect the support member of the link mechanism and the connection member of the work device without rattling, and the connection strength between the support member of the link mechanism and the connection member of the work device. I was able to increase.

［ＶＩＩ］
（構成）
本発明の第７特徴は、本発明の第６特徴の作業車の作業装置連結構造において次のように構成することにある。
弾性部材の弾性力を調節可能な調節機構を備える。 [VII]
(Constitution)
A seventh feature of the present invention resides in the following construction in the work device connection structure for a work vehicle of the sixth feature of the present invention.
An adjustment mechanism capable of adjusting the elastic force of the elastic member is provided.

（作用）
本発明の第７特徴によると、本発明の第６特徴と同様に前項［Ｉ］〜［ＶＩ］に記載の「作用」を備えており、これに加えて以下のような「作用」を備えている。
前項［ＶＩ］に記載のように、リンク機構の支持部材と作業装置の連結部材との間に弾性部材を備えた場合、本発明の第７特徴によると、連結機構によるリンク機構の支持部材と作業装置の連結部材との連結具合に応じて、弾性部材の弾性力（弾性部材からリンク機構の支持部材及び作業装置の連結部材への押圧力）を適切に調節することができる。 (Function)
According to the seventh feature of the present invention, the “action” described in the preceding paragraphs [I] to [VI] is provided in the same manner as the sixth feature of the present invention. In addition, the following “action” is provided. ing.
As described in [VI] above, when the elastic member is provided between the support member of the link mechanism and the connection member of the work device, according to the seventh feature of the present invention, the support member of the link mechanism by the connection mechanism The elastic force of the elastic member (the pressing force from the elastic member to the support member of the link mechanism and the connection member of the work device) can be appropriately adjusted according to the connection state with the connection member of the work device.

（発明の効果）
本発明の第７特徴によると、本発明の第６特徴と同様に前項［Ｉ］〜［ＶＩ］に記載の「発明の効果」を備えておりこれに加えて以下のような「発明の効果」を備えている。
本発明の第７特徴によると、弾性部材の弾性力（弾性部材からリンク機構の支持部材及び作業装置の連結部材への押圧力）を適切に調節することにより、リンク機構の支持部材と作業装置の連結部材とをガタ付きなく連結することができるようになって、リンク機構の支持部材と作業装置の連結部材との連結強度を高めることができた。 (The invention's effect)
According to the seventh feature of the present invention, the “effect of the invention” described in the preceding paragraphs [I] to [VI] is provided in the same manner as the sixth feature of the present invention. In addition, the following “effect of the invention” is provided. Is provided.
According to the seventh aspect of the present invention, by appropriately adjusting the elastic force of the elastic member (the pressing force from the elastic member to the support member of the link mechanism and the connecting member of the work device), the support member of the link mechanism and the work device Thus, the connection strength between the support member of the link mechanism and the connection member of the working device can be increased.

［１］
図１に示すように、右及び左の前輪１、右及び左の後輪２を備えた機体の後部に、リンク機構３が上下に揺動自在に備えられ、リンク機構３を昇降駆動する単動型の油圧シリンダ４が備えられており、リンク機構３の後部に６条植型式の苗植付装置５（作業装置に相当）が支持されて、作業車の一例である乗用型田植機が構成されている。 [1]
As shown in FIG. 1, a link mechanism 3 is provided at the rear of the machine body including right and left front wheels 1 and right and left rear wheels 2 so as to be swingable up and down. A dynamic hydraulic cylinder 4 is provided, and a six-plant type seedling planting device 5 (corresponding to a working device) is supported at the rear part of the link mechanism 3, and a riding type rice transplanter as an example of a working vehicle is provided. It is configured.

図１及び図２に示すように、苗植付装置５は、フィードケース６、フィードケース６に連結されて左右方向に延出された支持フレーム７、支持フレーム７に連結されて後方に延出された伝動ケース８、伝動ケース８の後部に回転駆動自在に支持された植付ケース９、植付ケース９の両端に備えられた一対の植付アーム１０、接地フロート１１及び苗のせ台１２等を備えて構成されている。これにより、苗のせ台１２が左右に往復横送り駆動されるのに伴って、植付ケース９が回転駆動され、苗のせ台１２の下部から植付アーム１０が交互に苗を取り出して田面に植え付ける。   As shown in FIGS. 1 and 2, the seedling planting device 5 includes a feed case 6, a support frame 7 connected to the feed case 6 and extending in the left-right direction, and connected to the support frame 7 and extending backward. Transmission case 8, a planting case 9 supported rotatably at the rear of the transmission case 8, a pair of planting arms 10 provided at both ends of the planting case 9, a grounding float 11, a seedling platform 12, etc. It is configured with. As a result, the planting case 9 is rotationally driven as the seedling platform 12 is driven to reciprocate laterally to the left and right, and the planting arm 10 alternately takes out the seedlings from the lower part of the seedling platform 12 and puts them on the rice field. Plant.

図１に示すように、肥料を貯留するホッパー１３及び繰り出し部１４が運転座席１８の後側に固定されて、運転座席１８の下側にブロア１５が備えられている。接地フロート１１に作溝器１６が備えられて、繰り出し部１４と作溝器１６とに亘って、ホース１７が接続されている。これにより、前述のような苗の植え付けに伴って、ホッパー１３から肥料が所定量ずつ繰り出し部１４によって繰り出され、ブロア１５の送風により肥料がホース１７を通って作溝器１６に供給されるのであり、作溝器１６を介して肥料が田面に供給される。肥料に代えて種籾をホッパー１３に貯留することにより、ホッパー１３から作溝器１６を介して種籾を田面に供給する直播作業も行うことができる（この場合、苗植付装置５を停止させる）。   As shown in FIG. 1, a hopper 13 for storing fertilizer and a feeding portion 14 are fixed to the rear side of the driver seat 18, and a blower 15 is provided below the driver seat 18. A groover 16 is provided in the ground float 11, and a hose 17 is connected across the feeding portion 14 and the groover 16. As a result, the fertilizer is fed from the hopper 13 by a predetermined amount by the feeding section 14 along with the seedling planting as described above, and the fertilizer is supplied to the groove producing device 16 through the hose 17 by the blower 15 blowing. Yes, fertilizer is supplied to the rice field through the groove generator 16. By storing the seed pods in the hopper 13 instead of the fertilizer, a direct sowing operation for supplying the seed potatoes from the hopper 13 to the rice field via the groove producing device 16 can also be performed (in this case, the seedling planting device 5 is stopped). .

図１，２，１２に示すように、苗植付装置５において、支持フレーム７の右及び左横側部に右及び左の回転式のマーカー１９が備えられており、右及び左のマーカー１９は倒伏し田面に接地して指標を描く作業位置（図１２の実線に示す状態参照）、及び起立して田面から上方に離れた退避位置（図１２の二点鎖線に示す状態参照）に揺動自在に構成されている。右及び左のマーカー１９はバネ３６により作業位置に付勢され、ワイヤ２０の引き操作により退避位置に操作されるように構成されており、右及び左のマーカー１９を退避位置に保持可能な保持フック３７が備えられている。   As shown in FIGS. 1, 2, and 12, in the seedling planting device 5, right and left rotary markers 19 are provided on the right and left lateral sides of the support frame 7, and the right and left markers 19 are provided. Falls to the work surface (see the state shown by the solid line in FIG. 12) to stand on the rice field, and swings to the retreat position (see the state shown by the two-dot chain line in FIG. 12) standing up and away from the rice field. It is configured to move freely. The right and left markers 19 are biased to a working position by a spring 36, and are configured to be moved to a retracted position by pulling the wire 20, so that the right and left markers 19 can be held at the retracted position. A hook 37 is provided.

［２］
次に、リンク機構３及びリンク機構３の後部に備えられる支持部材２１について説明する。
図４，６，８に示すように、１本のトップリンク３ａと右及び左のロアリンク３ｂとが機体の後部に上下に揺動自在に支持されて、リンク機構３が構成されており、リンク機構３のトップリンク３ａ、右及び左のロアリンク３ｂの後部に支持部材２１が備えられている。機体に備えられた制御装置（図示せず）から延出されたハーネス５３がリンク機構３のトップリンク３ａの上部に沿って延出され、ハーネス５３の端部のカプラ５３ａがリンク機構３のトップリンク３ａの上部に固定されている。 [2]
Next, the support member 21 provided in the rear part of the link mechanism 3 and the link mechanism 3 will be described.
As shown in FIGS. 4, 6, and 8, a link mechanism 3 is configured with a single top link 3 a and right and left lower links 3 b supported at the rear of the machine body so as to be swingable up and down. Support members 21 are provided at the rear of the top link 3a and the right and left lower links 3b of the link mechanism 3. A harness 53 extending from a control device (not shown) provided in the airframe is extended along the top of the top link 3a of the link mechanism 3, and the coupler 53a at the end of the harness 53 is connected to the top of the link mechanism 3. It is fixed to the upper part of the link 3a.

図６及び図８に示すように、支持部材２１は細長い縦向きの平板状の右及び左の縦壁部２１ａ、右及び左の縦壁部２１ａの上部に亘って連結された断面Ｕ字状の受け部２１ｂ、右及び左の縦壁部２１ａの中間部に亘って連結された箱状の支持部２１ｃ、右及び左の縦壁部２１ａの中間部（支持部２１ｃの下側）に亘って連結されたフレーム部２１ｄ、右及び左の縦壁部２１ａの上部に連結された右及び左の補強部２１ｅ等を備えて構成されており、左の縦壁部２１ａに操作ロッド５１（保持操作機構に相当）が固定されている。   As shown in FIGS. 6 and 8, the support member 21 has an elongated vertical plate-like right and left vertical wall portion 21 a and a U-shaped cross section connected over the upper portions of the right and left vertical wall portions 21 a. The receiving portion 21b, the box-shaped support portion 21c connected across the middle portion of the right and left vertical wall portions 21a, and the middle portion of the right and left vertical wall portions 21a (below the support portion 21c). The frame portion 21d is connected to the upper portion of the right and left vertical wall portions 21a, and the right and left reinforcing portions 21e are connected to the upper portion of the right and left vertical wall portions 21a. Equivalent to the operation mechanism) is fixed.

図６及び図８に示すように、支持部材２１の右及び左の補強部２１ｅに亘って支持軸２２が支持され、支持部材２１の右及び左の補強部２１ｅの間において、リンク機構３のトップリンク３ａの後部が支持軸２２に上下に揺動自在に取り付けられており、リンク機構３のトップリンク３ａの後部に操作アーム３ｃが固定されている。支持部材２１の右及び左の縦壁部２１ａの下部に亘って支持軸２３が支持されて、支持部材２１の右及び左の縦壁部２１ａの外側において、リンク機構３の右及び左のロアリンク３ｂの後部が支持軸２３に上下に揺動自在に取り付けられており、リンク機構３の右及び左のロアリンク３ｂの後部に、係合部５２（付勢操作機構に相当）（ローリングロック機構に相当）が固定されている。   As shown in FIGS. 6 and 8, the support shaft 22 is supported across the right and left reinforcement portions 21 e of the support member 21, and the link mechanism 3 is interposed between the right and left reinforcement portions 21 e of the support member 21. The rear portion of the top link 3 a is attached to the support shaft 22 so as to be swingable up and down, and the operation arm 3 c is fixed to the rear portion of the top link 3 a of the link mechanism 3. The support shaft 23 is supported across the lower portions of the right and left vertical wall portions 21a of the support member 21, and the right and left lower portions of the link mechanism 3 are disposed outside the right and left vertical wall portions 21a of the support member 21. The rear portion of the link 3b is attached to the support shaft 23 so as to be swingable up and down, and an engaging portion 52 (corresponding to an urging operation mechanism) (rolling lock) is attached to the rear portion of the right and left lower links 3b of the link mechanism 3. Equivalent to the mechanism) is fixed.

図１及び図４に示すように、リンク機構３のトップリンク３ａと機体との接続部分に、油圧シリンダ４が上下に揺動自在に支持され、油圧シリンダ４のピストンロッドにサスペンションバネ２４を介して、平面視二股状の接続部材２５が取り付けられている。図８に示すように、支持部材２１の右及び左の縦壁部２１ａと、リンク機構３の右及び左のロアリンク３ｂとの間において、接続部材２５が支持軸２３に上下に揺動自在に取り付けられている。これにより、油圧シリンダ４が収縮作動すると、リンク機構３及び支持部材２１が上昇駆動され、油圧シリンダ４が伸長作動すると、リンク機構３及び支持部材２１が下降駆動される。   As shown in FIGS. 1 and 4, a hydraulic cylinder 4 is supported at a connecting portion between the top link 3 a of the link mechanism 3 and the airframe so as to be swingable up and down, and a suspension spring 24 is attached to a piston rod of the hydraulic cylinder 4. A connecting member 25 having a bifurcated shape in plan view is attached. As shown in FIG. 8, the connection member 25 can swing up and down on the support shaft 23 between the right and left vertical wall portions 21 a of the support member 21 and the right and left lower links 3 b of the link mechanism 3. Is attached. As a result, when the hydraulic cylinder 4 is contracted, the link mechanism 3 and the support member 21 are driven up, and when the hydraulic cylinder 4 is extended, the link mechanism 3 and the support member 21 are driven down.

図６，８，１０（イ），１１（イ）に示すように、支持部材２１の支持部２１ｃの内部において、前後軸芯Ｐ１周りに右及び左の連結板２６（連結機構に相当）が揺動自在に支持されている。右及び左の連結板２６は平板状に構成され、右及び左の連結板２６の先端部がテーパー状（クサビ状）に構成されており、支持部材２１の支持部２１ｃのスリット２１ｆから外方に右及び左の連結板２６の先端部を突出させることができる。丸棒材を折り曲げて構成された操作レバー２７が、ブラケット２８を介して支持部材２１の支持部２１ｃに前後軸芯Ｐ２周りに揺動自在に支持されて、右及び左の連結板２６の長孔に操作レバー２７の端部が挿入されている。これにより図１０（イ）に示すように、操作レバー２７を取外位置Ａ１に操作すると、右及び左の連結板２６が支持部材２１の支持部２１ｃの内部に位置している。図１０（ロ）に示すように、操作レバー２７を連結位置Ａ２に操作すると、右及び左の連結板２６の先端部が支持部材２１の支持部２１ｃのスリット２１ｆから外方に突出する。   As shown in FIGS. 6, 8, 10 (A), 11 (A), right and left connecting plates 26 (corresponding to a connecting mechanism) are provided around the front and rear axis P <b> 1 inside the support portion 21 c of the support member 21. It is swingably supported. The right and left connecting plates 26 are formed in a flat plate shape, and the distal ends of the right and left connecting plates 26 are formed in a tapered shape (wedge shape), and outward from the slits 21f of the support portion 21c of the support member 21. In addition, the front end portions of the right and left connecting plates 26 can be projected. An operation lever 27 formed by bending a round bar is supported by a support portion 21c of a support member 21 via a bracket 28 so as to be swingable around a longitudinal axis P2, and the length of the right and left connecting plates 26 is increased. The end of the operating lever 27 is inserted into the hole. Accordingly, as shown in FIG. 10A, when the operation lever 27 is operated to the removal position A1, the right and left connecting plates 26 are positioned inside the support portion 21c of the support member 21. As shown in FIG. 10B, when the operation lever 27 is operated to the connection position A2, the front ends of the right and left connection plates 26 protrude outward from the slits 21f of the support portion 21c of the support member 21.

図６，８，１０（イ），１１（イ）に示すように、円盤状の受け板２９（調節機構に相当）にボルト２９ａが固定されたものが用意され、ゴム部材３０（弾性部材に相当）が用意されている。ゴム部材３０の中央の開口部に受け板２９のボルト２９ａが挿入され、支持部材２１のフレーム部２１ｄの左右中央の開口部に後側から、受け板２９のボルト２９ａが挿入されており、受け板２９のボルト２９ａにナット３１（調節機構に相当）が取り付けられている。これにより、支持部材２１の支持部２１ｃの下側において、支持部材２１のフレーム部２１ｄの左右中央に、ゴム部材３０が後向きに取り付けられた状態となっている。   As shown in FIGS. 6, 8, 10 (A), 11 (A), a disk-shaped receiving plate 29 (corresponding to an adjusting mechanism) with a bolt 29 a fixed thereto is prepared, and a rubber member 30 (an elastic member) is prepared. Equivalent) is prepared. The bolt 29a of the receiving plate 29 is inserted into the central opening of the rubber member 30, and the bolt 29a of the receiving plate 29 is inserted into the left and right central opening of the frame portion 21d of the support member 21 from the rear side. A nut 31 (corresponding to an adjusting mechanism) is attached to the bolt 29a of the plate 29. Thus, the rubber member 30 is attached to the lower side of the support portion 21c of the support member 21 at the center of the left and right sides of the frame portion 21d of the support member 21 in a rearward direction.

図４，６，８に示すように、支持部材２１の右及び左の縦壁部２１ａの下部にボス部３２が支持され、後部に咬合部３３ａを備えた伝動軸３３がボス部３２に回転自在に支持されている。エンジン（図示せず）の動力を伝達するＰＴＯ軸３４が機体の後部から後方に延出されており、ユニバーサルジョイント３５を介してＰＴＯ軸３４が伝動軸３３に接続されている。   As shown in FIGS. 4, 6, and 8, the boss portion 32 is supported at the lower part of the right and left vertical wall portions 21 a of the support member 21, and the transmission shaft 33 having the occlusal portion 33 a is rotated to the boss portion 32. It is supported freely. A PTO shaft 34 that transmits power of an engine (not shown) extends rearward from the rear part of the machine body, and the PTO shaft 34 is connected to the transmission shaft 33 via a universal joint 35.

［３］
次に、苗植付装置５に備えられた連結部材３９について説明する。
図６及び図７に示すように、フィードケース６の前部の前後軸芯Ｐ３周りにボス部３８が回転自在に支持されており、丸パイプを正面視で縦長のループ状に折り曲げて連結部材３９が構成されて、連結部材３９の下部がボス部３８に連結されている（連結部材３９が作業装置（苗植付装置５）の前部の前後軸芯Ｐ３周りにローリング自在に備えられた状態に相当）。ボス部３８の下側において、フィードケース６から入力軸４７が前側に突出しており、入力軸４７の前部に咬合部４７ａが備えられている。 [3]
Next, the connection member 39 provided in the seedling planting device 5 will be described.
As shown in FIGS. 6 and 7, a boss portion 38 is rotatably supported around the front and rear axis P3 of the front portion of the feed case 6, and the round pipe is bent into a vertically long loop shape when viewed from the front. 39 is configured, and the lower portion of the connecting member 39 is connected to the boss portion 38 (the connecting member 39 is provided so as to be able to roll around the front and rear axis P3 at the front portion of the working device (the seedling planting device 5). Equivalent to the state). An input shaft 47 projects forward from the feed case 6 below the boss portion 38, and an occlusal portion 47 a is provided at the front portion of the input shaft 47.

図６及び図７に示すように、連結部材３９の右及び左側部の上部に亘って支持軸４０が連結されており、板材をコ字状に折り曲げて構成された操作部材４１が支持軸４０に揺動自在に支持され、操作部材４１の前部にローラー４１ａが備えられている。連結部材３９の右及び左側部の下部とボス部３８とに亘って支持板３９ａが連結されており、右及び左のマーカー１９（図１２参照）に接続されたワイヤ２０のアウターが支持板３９ａに固定され、ワイヤ２０のインナーが操作部材４１に接続されている。   As shown in FIGS. 6 and 7, the support shaft 40 is connected to the upper part of the right and left side portions of the connection member 39, and the operation member 41 configured by bending the plate material into a U-shape is the support shaft 40. A roller 41 a is provided at the front portion of the operation member 41. A support plate 39a is connected across the lower portions of the right and left sides of the connecting member 39 and the boss portion 38, and the outer of the wire 20 connected to the right and left markers 19 (see FIG. 12) is the support plate 39a. The inner side of the wire 20 is connected to the operation member 41.

図２に示すように、支持フレーム７の右及び左側部から上方に支持フレーム４２が延出されて、支持フレーム４２の上部に亘ってガイドレール４３が連結されており、苗のせ台１２の上部が左右方向に移動自在にガイドレール４３に支持されている。伝動ケース８に亘って左右方向にガイドレール４４が支持されており、苗のせ台１２の下部が左右方向に移動自在にガイドレール４４に支持されている。連結部材３９の上部にブラケット３９ｂが固定され、ブラケット３９ｂにローリング機構４５が固定されており、ローリング機構４５により押し引き駆動されるワイヤ４５ａと、ガイドレール４３の右及び左側部とに亘ってコイルバネ４６が接続されている。   As shown in FIG. 2, the support frame 42 extends upward from the right and left side portions of the support frame 7, and a guide rail 43 is connected to the upper portion of the support frame 42. Is supported by the guide rail 43 so as to be movable in the left-right direction. A guide rail 44 is supported in the left-right direction across the transmission case 8, and a lower portion of the seedling bed 12 is supported by the guide rail 44 so as to be movable in the left-right direction. A bracket 39b is fixed to the upper part of the connecting member 39, and a rolling mechanism 45 is fixed to the bracket 39b. The coil spring extends over the wire 45a driven by the rolling mechanism 45 and the right and left sides of the guide rail 43. 46 is connected.

図６及び図７に示すように、ボス部３８の左横側部に支持軸３８ａが固定されており、板材を折り曲げて構成された保持アーム４８（保持機構に相当）が、支持軸３８ａに揺動自在に支持されている。支持フレーム７に固定されたブラケット７ａと保持アーム４８の下部とに亘ってバネ５０が接続されており、支持フレーム７に保持ピン７ｂが固定されている。   As shown in FIGS. 6 and 7, a support shaft 38a is fixed to the left side portion of the boss portion 38, and a holding arm 48 (corresponding to a holding mechanism) formed by bending a plate material is attached to the support shaft 38a. It is swingably supported. A spring 50 is connected between the bracket 7 a fixed to the support frame 7 and the lower portion of the holding arm 48, and the holding pin 7 b is fixed to the support frame 7.

図６及び図７に示すように、ボス部３８の右及び左横側部において、支持フレーム７にブラケット７ｃ及びボス部７ｄが固定されており、丸棒を正面視門型（コ字状）に折り曲げて構成された付勢ロッド４９（付勢機構に相当）が用意されて、付勢ロッド４９がブラケット７ｃの開口部及びボス部７ｄに上下スライド自在に挿入されている。付勢ロッド４９の上部に座金４９ａが固定され、付勢ロッド４９の下部にナット４９ｂが取り付けられており、付勢ロッド４９の座金４９ａと支持フレーム７のブラケット７ｃとの間にコイルバネ４９ｃが外嵌され、付勢ロッド４９のナット４９ｂと支持フレーム７のブラケット７ｃとの間にコイルバネ４９ｄが外嵌されている。   As shown in FIGS. 6 and 7, brackets 7c and boss portions 7d are fixed to the support frame 7 on the right and left side portions of the boss portion 38, and a round bar is formed in a frontal portal type (U-shaped). An urging rod 49 (corresponding to an urging mechanism) formed by bending the urging rod 49 is prepared, and the urging rod 49 is inserted into the opening of the bracket 7c and the boss 7d so as to be slidable up and down. A washer 49a is fixed to the upper part of the urging rod 49, and a nut 49b is attached to the lower part of the urging rod 49. A coil spring 49c is provided between the washer 49a of the urging rod 49 and the bracket 7c of the support frame 7. The coil spring 49d is externally fitted between the nut 49b of the urging rod 49 and the bracket 7c of the support frame 7.

［４］
次に、支持部材２１と連結部材３９との連結について説明する。
図４及び図６に示すように、支持部材２１と連結部材３９とを取り外した状態で（ホース１７が繰り出し部１４から取り外されて、苗植付装置５がスタンド６９に支持されている）、連結部材３９が苗植付装置５の前部の前後軸芯Ｐ３周りにローリング自在（ローリング機構４５が停止している状態で、コイルバネ４６が弾性変形する範囲でローリング自在）であるが、図６及び図７に示すように、バネ５０の付勢力により保持アーム４８が支持フレーム７の保持ピン７ｂに係合しており、保持アーム４８と支持フレーム７の保持ピン７ｂとの係合により、連結部材３９が苗植付装置５に対して所定位置（支持フレーム７に対して連結部材３９が直交する位置）に保持されている（保持機構（保持アーム４８）の保持状態に相当）。 [4]
Next, the connection between the support member 21 and the connection member 39 will be described.
As shown in FIGS. 4 and 6, with the support member 21 and the connecting member 39 removed (the hose 17 is removed from the feeding portion 14 and the seedling planting device 5 is supported by the stand 69), The connecting member 39 is freely rollable around the front and rear axis P3 of the front portion of the seedling planting device 5 (in the state where the coil spring 46 is elastically deformed in a state where the rolling mechanism 45 is stopped), it can be rolled. As shown in FIG. 7, the holding arm 48 is engaged with the holding pin 7 b of the support frame 7 by the biasing force of the spring 50, and the connection is established by the engagement between the holding arm 48 and the holding pin 7 b of the support frame 7. The member 39 is held at a predetermined position with respect to the seedling planting device 5 (a position where the connecting member 39 is orthogonal to the support frame 7) (corresponding to a holding state of the holding mechanism (holding arm 48)).

図４，６，７に示すように、支持部材２１と連結部材３９とを取り外した状態で、付勢ロッド４９は連結部材３９に全く影響を与えない状態である（付勢機構（付勢ロッド４９）の停止状態に相当）。苗植付装置５の各部に備えられたセンサー（図示せず）及びローリング機構４５から延出されたハーネス５４が備えられており、ハーネス５４の端部にカプラ５４ａが備えられている。図８に示すように、支持部材２１と連結部材３９とを取り外した状態で、操作レバー２７を取外位置Ａ１に操作して、右及び左の連結板２６を支持部材２１の支持部２１ｃの内部に位置させておく。   As shown in FIGS. 4, 6, and 7, the urging rod 49 does not affect the linking member 39 in a state where the support member 21 and the linking member 39 are removed (the urging mechanism (the urging rod)). 49) corresponding to the stop state). A sensor (not shown) provided in each part of the seedling planting device 5 and a harness 54 extended from the rolling mechanism 45 are provided, and a coupler 54 a is provided at an end of the harness 54. As shown in FIG. 8, with the support member 21 and the connecting member 39 removed, the operating lever 27 is operated to the removal position A1, and the right and left connecting plates 26 are connected to the support portion 21c of the support member 21. Keep it inside.

この状態において、図２，５，１０（イ），１１（イ）に示すように、リンク機構３の係合部５２を付勢ロッド４９の上部に係合させて、伝動軸３３の咬合部３３ａと入力軸４７の咬合部４７ａとを咬合させながら、支持部材２１を連結部材３９の内部に入り込ませて、支持部材２１の受け部２１ｂを連結部材３９の上部に下側から入り込ませ、連結部材３９の支持板３９ａを受け板２９及びゴム部材３０に当て付ける（支持部材２１と連結部材３９との間に弾性部材（ゴム部材３０）が備えられた状態に相当）。   In this state, as shown in FIGS. 2, 5, 10 (A), and 11 (A), the engagement portion 52 of the link mechanism 3 is engaged with the upper portion of the urging rod 49, and the occlusal portion of the transmission shaft 33 is engaged. 33 a and the occlusal portion 47 a of the input shaft 47 are engaged, the support member 21 enters the inside of the connecting member 39, and the receiving portion 21 b of the support member 21 enters the upper portion of the connecting member 39 from below to connect The support plate 39a of the member 39 is applied to the receiving plate 29 and the rubber member 30 (corresponding to a state in which an elastic member (rubber member 30) is provided between the support member 21 and the connecting member 39).

図１０（イ）及び図１１（イ）に示すように、連結部材３９の右及び左側部において右及び左の連結板２６に対向する部分に、ブロック状の当て板３９ｃが固定されており、支持部材２１を連結部材３９の内部に入り込ませて、支持部材２１の受け部２１ｂを連結部材３９の上部に下側から入り込ませ、連結部材３９の支持板３９ａを受け板２９及びゴム部材３０に当て付けた状態において、右及び左の連結板２６の先端部が連結部材３９の当て板３９ｃと略同じ位置に位置している。   As shown in FIG. 10 (a) and FIG. 11 (a), block-like backing plates 39c are fixed to the portions facing the right and left connecting plates 26 at the right and left sides of the connecting member 39, The support member 21 enters the inside of the connecting member 39, the receiving portion 21 b of the support member 21 enters the upper portion of the connecting member 39 from the lower side, and the support plate 39 a of the connecting member 39 is attached to the receiving plate 29 and the rubber member 30. In the applied state, the leading ends of the right and left connecting plates 26 are located at substantially the same position as the applying plate 39 c of the connecting member 39.

従って、この状態において図１０（ロ）及び図１１（ロ）に示すように、操作レバー２７を取外位置Ａ１から連結位置Ａ２に操作すると、右及び左の連結板２６の先端部が支持部材２１のスリット２１ｆから外方に突出して、連結部材３９の当て板３９ｃに乗り上がるのであり、右及び左の連結板２６による連結部材３９の当て板３９ｃへの乗り上がりによって、連結部材３９が支持部材２１に押圧される（連結部材３９の支持板３９ａが受け板２９及びゴム部材３０に押圧され、ゴム部材３０が圧縮されて少し弾性変形する）。これにより、支持部材２１と連結部材３９との連結を終了するのであり、図１に示すようにハーネス５４のカプラ５４ａをハーネス５３のカプラ５３ａに接続し、ホース１７を繰り出し部１４に接続する。
この場合、図１１（イ）（ロ）に示すように、事前にナット３１の操作により支持部材２１のフレーム部２１ｄと受け板２９との間隔を変更して、ゴム部材３０を弾性変形させておくことにより、連結部材３９の支持板３９ａが受け板２９及びゴム部材３０に押圧される際のゴム部材３０の弾性力を調節することができる。 Accordingly, in this state, as shown in FIGS. 10 (b) and 11 (b), when the operation lever 27 is operated from the disengagement position A1 to the connection position A2, the distal ends of the right and left connection plates 26 are supported by the support member. 21 protrudes outward from the slit 21f of 21 and rides on the contact plate 39c of the connection member 39. The connection member 39 is supported by the connection of the connection member 39 to the contact plate 39c by the right and left connection plates 26. Pressed by the member 21 (the support plate 39a of the connecting member 39 is pressed by the receiving plate 29 and the rubber member 30, and the rubber member 30 is compressed and slightly elastically deformed). As a result, the connection between the support member 21 and the connecting member 39 is terminated, and the coupler 54a of the harness 54 is connected to the coupler 53a of the harness 53 and the hose 17 is connected to the feeding portion 14 as shown in FIG.
In this case, as shown in FIGS. 11 (a) and 11 (b), the rubber member 30 is elastically deformed by changing the distance between the frame portion 21d of the support member 21 and the receiving plate 29 in advance by operating the nut 31. By placing, the elastic force of the rubber member 30 when the support plate 39a of the connecting member 39 is pressed against the receiving plate 29 and the rubber member 30 can be adjusted.

［５］
図５に示すように、支持部材２１を連結部材３９の内部に入り込ませて、支持部材２１の受け部２１ｂを連結部材３９の上部に下側から入り込ませた状態において、支持部材２１の操作ロッド５１が、バネ５０の付勢力に抗して操作アーム４８の上部を図５の紙面右方に押し操作するのであり、操作アーム４８がボス部３８の支持軸３８ａ周りに図５の紙面時計方向に揺動して、保持アーム４８が支持フレーム７の保持ピン７ｂから図５の紙面左方に離れる。 [5]
As shown in FIG. 5, in the state where the support member 21 enters the inside of the connecting member 39 and the receiving portion 21 b of the support member 21 enters the upper portion of the connecting member 39 from the lower side, the operation rod of the support member 21. 51 pushes the upper portion of the operation arm 48 against the urging force of the spring 50 to the right in the drawing of FIG. 5, and the operation arm 48 rotates around the support shaft 38a of the boss portion 38 in the clockwise direction of FIG. And the holding arm 48 moves away from the holding pin 7b of the support frame 7 to the left in FIG.

これにより、図２に示すように、連結部材３９が苗植付装置５の前部の前後軸芯Ｐ３周りにローリング自在な状態となるのであり（保持機構（保持アーム４８）の許容状態に相当）、リンク機構３に苗植付装置５が前後軸芯Ｐ３周りにローリング自在に支持された状態となる（ローリング機構４５が停止している状態で、コイルバネ４６が弾性変形する範囲でローリング自在な状態となるのであり、ローリング機構４５が作動してローリング機構４５のワイヤ４５ａが押し引き操作されると、コイルバネ４６を介して苗植付装置５が前後軸芯Ｐ３周りにローリング操作される）。   As a result, as shown in FIG. 2, the connecting member 39 can be rolled around the front and rear axis P3 of the front portion of the seedling planting device 5 (corresponding to an allowable state of the holding mechanism (holding arm 48)). ), The seedling planting device 5 is supported by the link mechanism 3 so as to be able to roll around the front and rear axis P3 (the rolling mechanism 45 is stopped and can be rolled within the range in which the coil spring 46 is elastically deformed). When the rolling mechanism 45 is activated and the wire 45a of the rolling mechanism 45 is pushed and pulled, the seedling planting device 5 is rolled around the front and rear axis P3 via the coil spring 46).

図２及び５に示すように、リンク機構３の係合部５２を付勢ロッド４９の上部に係合させると、リンク機構３（右及び左のロアリンク３ｂ）と付勢ロッド４９とが連結された状態となる（付勢機構（付勢ロッド４９）の付勢状態に相当）。
この状態において、付勢ロッド４９のコイルバネ４９ｃ，４９ｄは少し初期圧縮を受けた状態となっており、付勢ロット４９のコイルバネ４９ｃ，４９ｄが支持フレーム７のブラケット７ｃを挟み込む状態となっている。これにより、苗植付装置５が前後軸芯Ｐ３周りにローリングすると、リンク機構３（右及び左のロアリンク３ｂ）に連結された付勢ロッド４９に対して、苗植付装置５（支持フレーム７）が前後軸芯Ｐ３周りにローリングする状態となり、支持フレーム７のブラケット７ｃにより付勢ロット４９のコイルバネ４９ｃ，４９ｄが圧縮操作されることになって、付勢ロット４９のコイルバネ４９ｃ，４９ｄにより、苗植付装置５が図２に示す所定位置（支持フレーム７に対して連結部材３９が直交する位置）に付勢される。 2 and 5, when the engaging portion 52 of the link mechanism 3 is engaged with the upper portion of the biasing rod 49, the link mechanism 3 (the right and left lower links 3b) and the biasing rod 49 are connected. (This corresponds to the urging state of the urging mechanism (the urging rod 49)).
In this state, the coil springs 49 c and 49 d of the urging rod 49 are in a state where they are slightly subjected to initial compression, and the coil springs 49 c and 49 d of the urging lot 49 sandwich the bracket 7 c of the support frame 7. Thus, when the seedling planting device 5 rolls around the longitudinal axis P3, the seedling planting device 5 (support frame) is applied to the urging rod 49 connected to the link mechanism 3 (the right and left lower links 3b). 7) is in a state of rolling around the longitudinal axis P3, and the coil springs 49c, 49d of the biasing lot 49 are compressed by the bracket 7c of the support frame 7, and the coil springs 49c, 49d of the biasing lot 49 are compressed. The seedling planting device 5 is biased to a predetermined position shown in FIG. 2 (a position where the connecting member 39 is orthogonal to the support frame 7).

図３及び図９に示すように、リンク機構３が上昇駆動されると、苗植付装置５（支持フレーム７）に対してリンク機構３の係合部５２が相対的に上昇することになり、支持フレーム７のブラケット７ｃにより付勢ロッド４９のコイルバネ４９ｄが圧縮されることになって、リンク機構３が上昇限度に上昇駆動されると、付勢ロッド４９のコイルバネ４９ｄが密着状態となる（リンク機構３が付勢機構（付勢ロッド４９）を作動範囲の限界位置に操作した状態に相当）。このように、付勢ロッド４９のコイルバネ４９ｄが密着状態になると、付勢ロッド４９のコイルバネ４９ｄをそれ以上に圧縮できない状態となるので、苗植付装置５の前後軸芯Ｐ３周りのローリングがロックされた状態となる。   As shown in FIGS. 3 and 9, when the link mechanism 3 is driven up, the engaging portion 52 of the link mechanism 3 rises relative to the seedling planting device 5 (support frame 7). When the coil spring 49d of the urging rod 49 is compressed by the bracket 7c of the support frame 7 and the link mechanism 3 is driven up to the ascending limit, the coil spring 49d of the urging rod 49 comes into close contact ( This corresponds to a state in which the link mechanism 3 has operated the urging mechanism (the urging rod 49) to the limit position of the operating range). As described above, when the coil spring 49d of the urging rod 49 comes into close contact, the coil spring 49d of the urging rod 49 cannot be compressed any further, so that the rolling around the front and rear axis P3 of the seedling planting device 5 is locked. It will be in the state.

図３及び図９に示すように、リンク機構３が上昇駆動されると、リンク機構３の操作アーム３ｃが操作部材４１のローラー４１ａに接当し、操作部材４１が支持軸４０周りに揺動して、ワイヤ２０のインナーが引き操作される。これにより、図２及び図１２の二点鎖線に示すように、作業位置の右及び左のマーカー１９が退避位置に操作されて、保持フック３７により退避位置に保持されるのであり、この後に図３に示すスタンド６９を苗植付装置３から取り外す。   As shown in FIGS. 3 and 9, when the link mechanism 3 is driven upward, the operation arm 3 c of the link mechanism 3 contacts the roller 41 a of the operation member 41, and the operation member 41 swings around the support shaft 40. Then, the inner wire 20 is pulled. As a result, as shown by the two-dot chain line in FIGS. 2 and 12, the right and left markers 19 of the working position are operated to the retracted position and are held at the retracted position by the holding hook 37. 3 is removed from the seedling planting device 3.

［発明の実施の第１別形態］
前述の［発明を実施するための最良の形態］において、図８に示す右及び左の連結板２６に代えて、図１３（イ）（ロ）（ハ）に示すように構成してもよい。
図１３（イ）に示すように、支持部材２１の支持部２１ｃに皿部材５５及びボス部材５６が固定されており、連結軸５７（連結機構に相当）がボス部材５６にスライド及び回転自在に支持されて、連結軸５７が支持部材２１の支持部２１ｃから突出している。連結軸５７の一方の端部に、長方形状の連結板５７ａが固定されており、連結軸５７の他方の端部の軸芯Ｐ４周りに操作アーム５８が揺動自在に支持されている。連結部材３９の支持板３９ａが支持部材２１の支持部２１ｃの位置まで延出されており、連結軸５７の連結板５７ａに対応する長方形状の開口部３９ｄが横向きに形成されている。 [First Alternative Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], instead of the right and left connecting plates 26 shown in FIG. 8, it may be configured as shown in FIGS. .
As shown in FIG. 13A, the dish member 55 and the boss member 56 are fixed to the support portion 21c of the support member 21, and the connecting shaft 57 (corresponding to the connecting mechanism) is slidable and rotatable on the boss member 56. As a result, the connecting shaft 57 protrudes from the support portion 21 c of the support member 21. A rectangular connecting plate 57 a is fixed to one end of the connecting shaft 57, and an operation arm 58 is swingably supported around the axis P <b> 4 of the other end of the connecting shaft 57. The support plate 39a of the connection member 39 extends to the position of the support portion 21c of the support member 21, and a rectangular opening 39d corresponding to the connection plate 57a of the connection shaft 57 is formed sideways.

これにより、支持部材２１と連結部材３９とを連結する場合、図１３（イ）に示すように、操作アーム５８の第１端部５８ａがボス部材５６に接当するように、操作アーム５８を軸芯Ｐ４周りに操作した状態において、支持部材２１を連結部材３９の内部に入り込ませ、支持部材２１の受け部２１ｂを連結部材３９の上部に下側から入り込ませて、連結軸５７の連結板５７ａを連結部材３９の開口部３９ｄに挿入する。   As a result, when the support member 21 and the connecting member 39 are connected, the operating arm 58 is moved so that the first end 58a of the operating arm 58 contacts the boss member 56 as shown in FIG. In the state operated around the shaft core P4, the support member 21 enters the inside of the connecting member 39, the receiving portion 21b of the support member 21 enters the upper part of the connecting member 39 from the lower side, and the connecting plate of the connecting shaft 57 57 a is inserted into the opening 39 d of the connecting member 39.

次に図１３（ロ）（ハ）に示すように、操作アーム５８及び連結軸５７を約９０度回転させた後、操作アーム５８の第２端部５８ｂがボス部材５６に乗り上がるように、操作アーム５８を軸芯Ｐ４周りに操作すると、操作アーム５８及び連結軸５７が図１３（ロ）の紙面左方にスライド操作され、連結軸５７の連結板５７ａが連結部材３９の支持板３９ａに押圧されることになって、支持部材２１と連結部材３９との連結を終了する。   Next, as shown in FIGS. 13B and 13C, after the operation arm 58 and the connecting shaft 57 are rotated by about 90 degrees, the second end 58b of the operation arm 58 rides on the boss member 56. When the operating arm 58 is operated around the axis P4, the operating arm 58 and the connecting shaft 57 are slid to the left in FIG. 13B, and the connecting plate 57a of the connecting shaft 57 is moved to the support plate 39a of the connecting member 39. As a result, the connection between the support member 21 and the connection member 39 ends.

［発明の実施の第２別形態］
前述の［発明を実施するための最良の形態］において、図８に示す右及び左の連結板２６に代えて、図１４に示すように構成してもよい。
図１４に示すように、雌ネジ部を備えたボス部材５９が連結部材３９の右及び左側部に固定されて、支持部材２１の支持部２１ｃの右及び左側部に開口部が形成されており、円錐状の先端部を備えた連結ボルト６０（連結機構に相当）が用意されている。 [Second Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], instead of the right and left connecting plates 26 shown in FIG. 8, a configuration as shown in FIG.
As shown in FIG. 14, the boss member 59 having a female screw portion is fixed to the right and left sides of the connecting member 39, and openings are formed on the right and left sides of the support portion 21 c of the support member 21. A connecting bolt 60 (corresponding to a connecting mechanism) having a conical tip is prepared.

これにより、支持部材２１と連結部材３９とを連結する場合、図１４に示すように、支持部材２１を連結部材３９の内部に入り込ませ、支持部材２１の受け部２１ｂを連結部材３９の上部に下側から入り込ませた状態において、連結ボルト６０をボス部材５９にネジ込んで、連結ボルト６０の先端部を支持部材２１の支持部２１ｃの開口部に入れ込むことにより、支持部材２１と連結部材３９との連結を終了する。   Thereby, when connecting the supporting member 21 and the connecting member 39, as shown in FIG. 14, the supporting member 21 enters the inside of the connecting member 39, and the receiving portion 21b of the supporting member 21 is placed on the upper portion of the connecting member 39. In the state where it is inserted from the lower side, the connecting bolt 60 is screwed into the boss member 59 and the tip of the connecting bolt 60 is inserted into the opening of the support portion 21c of the support member 21, whereby the support member 21 and the connecting member are connected. The connection with 39 is terminated.

［発明の実施の第３別形態］
前述の［発明を実施するための最良の形態］において、図８に示す右及び左の連結板２６に代えて、図１５（イ）（ロ）に示すように構成してもよい。
図１５（イ）に示すように、連結部材３９の支持板３９ａに、クサビ状の第１連結体６４（連結機構に相当）が上向きに固定されている。支持部材２１の右及び左の縦壁部２１ａに亘る横軸芯Ｐ５周りに、下向きのクサビ状の第２連結体６５（連結機構に相当）が上下に揺動及び固定自在に支持されており、第２連結体６５から操作レバー６５ａが延出されている。 [Third Another Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], instead of the right and left connecting plates 26 shown in FIG. 8, a configuration as shown in FIGS.
As shown in FIG. 15A, a wedge-shaped first connecting body 64 (corresponding to a connecting mechanism) is fixed upward on a support plate 39 a of the connecting member 39. A downward wedge-shaped second coupling body 65 (corresponding to a coupling mechanism) is supported so as to be swingable and fixed up and down around the horizontal axis P5 across the right and left vertical wall portions 21a of the support member 21. An operation lever 65 a extends from the second connecting body 65.

これにより、支持部材２１と連結部材３９とを連結する場合、図１５（イ）（ロ）に示すように、支持部材２１を連結部材３９の内部に入り込ませ、支持部材２１の受け部２１ｂを連結部材３９の上部に下側から入り込ませた状態において、第２連結体６５の操作レバー６５ａにより第２連結体６５を下方に揺動させて、第２連結体６５のクサビ面（テーパー面）を第１連結体６４のクサビ面（テーパー面）に押し付けて、第２連結体６５の位置を固定することにより、支持部材２１と連結部材３９との連結を終了する。   Thereby, when connecting the support member 21 and the connection member 39, as shown to FIG. 15 (A) (B), the support member 21 is made to enter the inside of the connection member 39, and the receiving part 21b of the support member 21 is made. In a state where the upper part of the connecting member 39 is inserted from the lower side, the second connecting body 65 is swung downward by the operation lever 65a of the second connecting body 65, so that the wedge surface (tapered surface) of the second connecting body 65 is obtained. Is pressed against the wedge surface (tapered surface) of the first connecting body 64 to fix the position of the second connecting body 65, thereby completing the connection between the support member 21 and the connecting member 39.

［発明の実施の第４別形態］
前述の［発明を実施するための最良の形態］［発明の実施の第１別形態］〜［発明の実施の第３別形態］において、図１６に示す構成を備えてもよい。
図１６に示すように、リンク機構３のトップリンク３ａにブラケット６１が固定されており、ブラケット６１に固定された支持軸６１ａ周りにフック部材６２が揺動自在に支持されている。フック部材６２に操作アーム６２ａが固定され、ブラケット６１に固定されたピン６１ｂとフック部材６２の操作アーム６２ａとに亘ってトッグルバネ６３が架設されており、図１６の実線に示すフック部材６２の姿勢でフック部材６２に接当する凸部６１ｃがブラケット６１に備えられている。油圧シリンダ４のピストンロッドにサスペンションバネ２４を介して取り付けられる平面視二股状の接続部材２５において、接続部材２５の右及び左側部に亘ってロッド２５ａが固定されている。 [Fourth Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention] [First Alternative Embodiment of the Invention] to [Third Alternative Embodiment of the Invention], the configuration shown in FIG. 16 may be provided.
As shown in FIG. 16, a bracket 61 is fixed to the top link 3 a of the link mechanism 3, and a hook member 62 is swingably supported around a support shaft 61 a fixed to the bracket 61. An operation arm 62a is fixed to the hook member 62, and a toggle spring 63 is installed between the pin 61b fixed to the bracket 61 and the operation arm 62a of the hook member 62. The posture of the hook member 62 shown by the solid line in FIG. The bracket 61 is provided with a convex portion 61 c that contacts the hook member 62. In a connecting member 25 having a bifurcated shape in plan view attached to a piston rod of the hydraulic cylinder 4 via a suspension spring 24, a rod 25a is fixed over the right and left side portions of the connecting member 25.

これにより、油圧シリンダ４によってリンク機構３を昇降駆動する状態では、フック部材６２の操作アーム６２ａを、図１６の二点鎖線に示すようにの紙面左方に操作し、トッグルバネ６３によりフック部材６２を接続部材２５から離れた位置に保持しておく。
次にトッグルバネ６３の付勢力に抗してフック部材６２の操作アーム６２ａを、図１６の実線に示すようにの紙面右方に操作し、フック部材６２をブラケット６１の凸部６１ａに接当する姿勢に保持した状態において、油圧シリンダ４によりリンク機構３を上昇限度に上昇駆動すると、接続部材２５のロッド２５ａがフック部材６２に自動的に係合する。これにより、フック部材６２によってリンク機構３を上昇限度に保持しておくことができる。 As a result, in a state in which the link mechanism 3 is driven up and down by the hydraulic cylinder 4, the operation arm 62 a of the hook member 62 is operated to the left side of the sheet as shown by a two-dot chain line in FIG. 16, and the hook member 62 is operated by the toggle spring 63. Is held at a position away from the connection member 25.
Next, the operating arm 62 a of the hook member 62 is operated to the right of the paper surface as shown by the solid line in FIG. 16 against the urging force of the toggle spring 63, and the hook member 62 contacts the convex portion 61 a of the bracket 61. When the link mechanism 3 is driven to the upper limit by the hydraulic cylinder 4 while being held in the posture, the rod 25a of the connecting member 25 is automatically engaged with the hook member 62. Thereby, the link mechanism 3 can be held at the upper limit by the hook member 62.

［発明の実施の第５別形態］
前述の［発明を実施するための最良の形態］［発明の実施の第１別形態］〜［発明の実施の第４別形態］において、図１７に示す構成を備えてもよい。
図１７に示すように、機体の後部にロータリ式のポテンショメータ６６が固定され、ポテンショメータ６６の検出アーム６６ａと、リンク機構３の右又は左のロアリンク３ｂとが連係リンク６７により接続されており、機体に対するリンク機構３の上下角度を各種の制御操作用としてポテンショメータ６６により検出するように構成されている。 [Fifth Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention] [First Alternative Embodiment of the Invention] to [Fourth Alternative Embodiment of the Invention], the configuration shown in FIG. 17 may be provided.
As shown in FIG. 17, a rotary potentiometer 66 is fixed to the rear part of the machine body, and a detection arm 66 a of the potentiometer 66 and a right or left lower link 3 b of the link mechanism 3 are connected by a link link 67. The vertical angle of the link mechanism 3 with respect to the airframe is configured to be detected by a potentiometer 66 for various control operations.

図１７に示すように、ポテンショメータ６６の検出アーム６６ａの揺動範囲に沿って、表示プレート６８が機体に取り付けられており、リンク機構３の上下角度に応じた複数の領域６８ａが表示プレート６８に備えらえている。例えば支持部材２１に苗植付装置５（連結部材３９）を連結する場合や、支持部材２１に除草機（作業装置に相当）（図示せず）（連結部材３９）を連結する場合等のように、支持部材２１と連結部材３９とを連結する場合の支持部材２１の高さが異なる場合、表示プレート６８の領域６８ａはリンク機構３の適切な上下角度を意味している。
これにより、表示プレート６８の領域６８ａとポテンショメータ６６の検出アーム６６ａとを目視しながら、支持部材２１（リンク機構３の上下角度）が適切なものとなるように、油圧シリンダ４によりリンク機構３を昇降駆動する。 As shown in FIG. 17, the display plate 68 is attached to the machine body along the swing range of the detection arm 66 a of the potentiometer 66, and a plurality of regions 68 a corresponding to the vertical angle of the link mechanism 3 are formed on the display plate 68. Prepared. For example, when the seedling planting device 5 (connection member 39) is connected to the support member 21, or when a weeding machine (corresponding to a working device) (not shown) (connection member 39) is connected to the support member 21, etc. In addition, when the height of the support member 21 when the support member 21 and the connection member 39 are connected is different, the region 68 a of the display plate 68 means an appropriate vertical angle of the link mechanism 3.
As a result, while observing the area 68a of the display plate 68 and the detection arm 66a of the potentiometer 66, the link mechanism 3 is moved by the hydraulic cylinder 4 so that the support member 21 (the vertical angle of the link mechanism 3) becomes appropriate. Drive up and down.

乗用型田植機の全体側面図Overall side view of riding rice transplanter 苗植付装置の正面図Front view of seedling planting device リンク機構の支持部材と苗植付装置の連結部材とを連結した状態で、リンク機構が上昇駆動された状態を示すリンク機構及び苗植付装置の側面図Side view of link mechanism and seedling planting device showing a state in which link mechanism is driven up in a state where link mechanism support member and seedling planting device coupling member are coupled リンク機構の支持部材と苗植付装置の連結部材とを取り外した状態で、リンク機構が下降駆動され、苗植付装置がスタンドに支持された状態を示すリンク機構及び苗植付装置の側面図Side view of link mechanism and seedling planting device showing state where link mechanism is driven to descend and seedling planting device is supported by stand with support member of link mechanism and connecting member of seedling planting device removed. リンク機構の支持部材と苗植付装置の連結部材とを連結した状態で、リンク機構が下降駆動された状態を示す側面図The side view which shows the state by which the link mechanism was driven downward in the state which connected the support member of the link mechanism, and the connection member of the seedling planting apparatus. リンク機構の支持部材と苗植付装置の連結部材とを取り外した状態で、リンク機構が下降駆動された状態を示す側面図The side view which shows the state by which the link mechanism was driven downward in the state which removed the support member of the link mechanism, and the connection member of the seedling planting apparatus. 苗植付装置の連結部材の付近の正面図Front view near the connection member of the seedling planting device リンク機構の支持部材の付近の正面図Front view near the support member of the link mechanism リンク機構の支持部材と苗植付装置の連結部材とを連結した状態で、リンク機構が上昇駆動された状態を示す側面図The side view which shows the state by which the link mechanism was driven up in the state which connected the supporting member of the link mechanism, and the connection member of the seedling planting apparatus. リンク機構の支持部材における連結板の付近の縦断正面図Longitudinal front view near the connecting plate in the support member of the link mechanism リンク機構の支持部材における連結板の付近の横断平面図Transverse plan view near the connecting plate in the support member of the link mechanism 苗植付装置における左のマーカーの付近の正面図Front view near the left marker in the seedling planting device 発明の実施の第１別形態におけるリンク機構の支持部材及び苗植付装置の連結部材の付近の縦断側面図Longitudinal side view in the vicinity of the support member of the link mechanism and the connecting member of the seedling planting device in the first alternative embodiment of the invention 発明の実施の第２別形態におけるリンク機構の支持部材及び苗植付装置の連結部材の付近の縦断正面図Longitudinal front view in the vicinity of the supporting member of the link mechanism and the connecting member of the seedling planting device in the second alternative embodiment of the invention 発明の実施の第３別形態におけるリンク機構の支持部材及び苗植付装置の連結部材の付近の縦断側面図Longitudinal side view in the vicinity of the supporting member of the link mechanism and the connecting member of the seedling planting device in the third alternative embodiment of the invention 発明の実施の第４別形態におけるリンク機構の付近の側面図Side view of the vicinity of a link mechanism in a fourth alternative embodiment of the invention 発明の実施の第５別形態におけるポテンショメータの付近の側面図Side view of the vicinity of a potentiometer in a fifth alternative embodiment of the invention

符号の説明Explanation of symbols

３ リンク機構
５ 作業装置
２１ 支持部材
２６，５７，６０，６４，６５ 連結機構
２９，３１ 調節機構
３０ 弾性部材
３９ 連結部材
４８ 保持機構
４９ 付勢機構
５１ 保持操作機構
５２ 付勢操作機構、ローリングロック機構
Ｐ３ 前後軸芯 DESCRIPTION OF SYMBOLS 3 Link mechanism 5 Working apparatus 21 Support member 26,57,60,64,65 Connection mechanism 29,31 Adjustment mechanism 30 Elastic member 39 Connection member 48 Holding mechanism 49 Energizing mechanism 51 Holding operation mechanism 52 Energizing operation mechanism, Rolling lock Mechanism P3 Longitudinal axis

Claims (7)

機体の後部にリンク機構を上下に揺動駆動自在に備えて、前記リンク機構の後部に支持部材を備え、
連結部材を作業装置の前部の前後軸芯周りにローリング自在に備えて、前記リンク機構の支持部材と作業装置の連結部材とを連結及び取り外し自在に構成すると共に、
前記作業装置に対する連結部材のローリングを許容する許容状態及び連結部材を作業装置に対して所定位置で保持する保持状態に操作自在な保持機構を備えて、
前記リンク機構の支持部材と作業装置の連結部材とを取り外すと、前記保持機構を保持状態に操作し、前記リンク機構の支持部材と作業装置の連結部材とを連結すると、前記保持機構を許容状態に操作する保持操作機構を備えてある作業車の作業装置連結構造。 A link mechanism is provided at the rear of the machine body so as to be swingable up and down, and a support member is provided at the rear of the link mechanism,
A connecting member is provided so as to be able to roll around the front and rear axis of the front part of the working device, and the support member of the link mechanism and the connecting member of the working device are configured to be freely connected and detached,
A holding mechanism that is operable in an allowable state that allows rolling of the connecting member relative to the working device and a holding state that holds the connecting member in a predetermined position with respect to the working device;
When the support member of the link mechanism and the connecting member of the work device are removed, the holding mechanism is operated to a holding state, and when the support member of the link mechanism and the connecting member of the work device are connected, the holding mechanism is allowed. A work device connection structure for a work vehicle, which is provided with a holding operation mechanism that is operated on the vehicle. 前記作業装置を連結部材に対して所定位置に付勢する付勢状態及び付勢を停止する停止状態に操作自在な付勢機構を備えて、
前記リンク機構の支持部材と作業装置の連結部材とを取り外すと、前記付勢機構を停止状態に操作し、前記リンク機構の支持部材と作業装置の連結部材とを連結すると、前記付勢機構を付勢状態に操作する付勢操作機構を備えてある請求項１に記載の作業車の作業装置連結構造。 A biasing mechanism operable to bias the working device to a predetermined position with respect to the connecting member and a stop state to stop the biasing;
When the support member of the link mechanism and the connection member of the work device are removed, the biasing mechanism is operated to stop, and when the support member of the link mechanism and the connection member of the work device are connected, the biasing mechanism is The work device connection structure for a work vehicle according to claim 1, further comprising an urging operation mechanism that operates in an urging state. 前記リンク機構の支持部材と作業装置の連結部材とを連結した状態において、前記リンク機構を上昇駆動すると、前記作業装置のローリングをロックするローリングロック機構を備えてある請求項１又は２に記載の作業車の作業装置連結構造。   3. The rolling lock mechanism according to claim 1, further comprising: a rolling lock mechanism that locks the rolling of the work device when the link mechanism is driven to rise in a state where the support member of the link mechanism and the connection member of the work device are connected. Work vehicle connection structure for work vehicles. 前記リンク機構が付勢機構を作動範囲の限界位置に操作することにより、前記作業装置のローリングがロックされるように、前記ローリングロック機構を構成してある請求項３に記載の作業車の作業装置連結構造。   The work of the work vehicle according to claim 3, wherein the rolling lock mechanism is configured so that the rolling of the work device is locked by the link mechanism operating the biasing mechanism to the limit position of the operation range. Device connection structure. 前記リンク機構の支持部材と作業装置の連結部材とを互いに押圧するように、前記リンク機構の支持部材と作業装置の連結部材とを連結する連結機構を備えてある請求項１〜４のうちのいずれか一つに記載の作業車の作業装置連結構造。   The connecting mechanism for connecting the supporting member of the link mechanism and the connecting member of the working device so as to press the supporting member of the link mechanism and the connecting member of the working device together is provided. The working device connection structure for a work vehicle according to any one of the above. 前記リンク機構の支持部材と作業装置の連結部材との間に弾性部材を備えてある請求項５に記載の作業車の作業装置連結構造。   The work device connection structure for a work vehicle according to claim 5, further comprising an elastic member between a support member of the link mechanism and a connection member of the work device. 前記弾性部材の弾性力を調節可能な調節機構を備えてある請求項６に記載の作業車の作業装置連結構造。   The work device connection structure for a work vehicle according to claim 6, further comprising an adjustment mechanism capable of adjusting an elastic force of the elastic member.
JP2005357747A 2005-12-12 2005-12-12 Work device-linking structure for working vehicle Pending JP2007159445A (en)

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JP2014103916A (en) * 2012-11-28 2014-06-09 Iseki & Co Ltd Working vehicle
CN104938108A (en) * 2014-03-27 2015-09-30 株式会社久保田 Seedling planting device
JP2016067265A (en) * 2014-09-29 2016-05-09 井関農機株式会社 Work vehicle
JP2021103993A (en) * 2019-12-26 2021-07-26 株式会社クボタ Working machine
JP2021158967A (en) * 2020-03-31 2021-10-11 日本甜菜製糖株式会社 Coupling device and production method of crop

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JPH078030A (en) * 1993-06-28 1995-01-13 Yanmar Agricult Equip Co Ltd Rolling lock structure of planting part in rice transplanter for riding
JPH1156009A (en) * 1997-08-11 1999-03-02 Iseki & Co Ltd Farm working machine
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JP2005137256A (en) * 2003-11-06 2005-06-02 Kubota Corp Paddy field working vehicle

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JPH078030A (en) * 1993-06-28 1995-01-13 Yanmar Agricult Equip Co Ltd Rolling lock structure of planting part in rice transplanter for riding
JPH1156009A (en) * 1997-08-11 1999-03-02 Iseki & Co Ltd Farm working machine
JP2003169512A (en) * 2001-12-04 2003-06-17 Kubota Corp Working machine for paddy field
JP2005137256A (en) * 2003-11-06 2005-06-02 Kubota Corp Paddy field working vehicle

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014103916A (en) * 2012-11-28 2014-06-09 Iseki & Co Ltd Working vehicle
CN104938108A (en) * 2014-03-27 2015-09-30 株式会社久保田 Seedling planting device
JP2015188347A (en) * 2014-03-27 2015-11-02 株式会社クボタ Work device
JP2016067265A (en) * 2014-09-29 2016-05-09 井関農機株式会社 Work vehicle
JP2021103993A (en) * 2019-12-26 2021-07-26 株式会社クボタ Working machine
JP7195249B2 (en) 2019-12-26 2022-12-23 株式会社クボタ work machine
JP2021158967A (en) * 2020-03-31 2021-10-11 日本甜菜製糖株式会社 Coupling device and production method of crop
JP7179797B2 (en) 2020-03-31 2022-11-29 日本甜菜製糖株式会社 Coupling device and crop production method

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