JP2024063330A

JP2024063330A - combine

Info

Publication number: JP2024063330A
Application number: JP2022171174A
Authority: JP
Inventors: 智洋谷上; 達也三宅; 光瑠上田; 泰行杉田; 憲之坂本; 宏真大▲高▼; 寛樹渡部
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2024-05-13

Abstract

【課題】刈取装置の上部と保護カバーの干渉を防止して、刈取装置のメンテナンスを容易に行うことができるコンバインを提供する。【解決手段】刈取装置（３）を、圃場の穀稈を引起こす引起装置（２１）と、穀稈の株元を刈取る刈刃装置（２２）と、刈取られた穀稈を脱穀装置（４）に向けて搬送する搬送装置（２３）で形成し、引起装置（２１）の上方に左右方向に、エンジンの出力回転を伝動する回転軸を内装した延在する第１伝動筒（１４）を設け、引起装置（２１）の上部を覆う保護カバー（１６）を、第１伝動筒（１４）の前側に設け、保護カバー（１６）の下部が、引起装置（２１）の上部を覆う作業姿勢と、保護カバー（１６）の下部が、引起装置（２１）の上部から離間する待避姿勢を移動可能な構成に形成した。【選択図】図５[Problem] To provide a combine harvester that can easily perform maintenance of the harvesting device by preventing interference between the upper part of the harvesting device and a protective cover. [Solution] The harvesting device (3) is formed of a lifting device (21) that lifts up culms in a field, a cutting blade device (22) that cuts the base of the culms, and a transport device (23) that transports the harvested culms toward a threshing device (4). A first transmission tube (14) that extends in the left-right direction above the lifting device (21) and has a rotating shaft that transmits the output rotation of the engine inside is provided, and a protective cover (16) that covers the upper part of the lifting device (21) is provided in front of the first transmission tube (14), and the lower part of the protective cover (16) is configured to be movable between a working position in which the lower part of the protective cover (16) covers the upper part of the lifting device (21) and a retracted position in which the lower part of the protective cover (16) is separated from the upper part of the lifting device (21). [Selected Figure] Figure 5

Description

本発明は、刈取装置の引起装置の上部に保護カバーを装着したコンバインに関するものである。 The present invention relates to a combine harvester equipped with a protective cover on top of the lifting device of the harvesting device.

刈取装置の引起装置や搬送装置のメンテナンスを行うために、エンジンの出力回転を引起装置に伝動する回転軸を内装した伝動筒を支点として引起装置の下部を上方に引起す技術が知られていた。（特許文献１参照） In order to perform maintenance on the lifting device and transport device of the harvesting equipment, a technology was known in which the lower part of the lifting device was lifted upward using a transmission tube, which has a rotating shaft inside that transmits the output rotation of the engine to the lifting device, as a fulcrum. (See Patent Document 1)

また、刈取装置の引起装置や搬送装置のメンテナンスを行うために、エンジンの出力回転を引起装置に伝動する回転軸を内装した伝動筒から引起装置の上部を前方に引出す技術が知られていた。（特許文献２参照） In addition, a technique was known in which the upper part of the lifting device of the harvesting machine was pulled out forward from a transmission tube that contained a rotating shaft that transmits the engine output rotation to the lifting device in order to perform maintenance on the lifting device and the transport device. (See Patent Document 2)

さらに、刈取装置の引起装置や搬送装置のメンテナンスを行うために、エンジンの出力回転を引起装置に伝動する回転軸を内装した伝動筒に沿って引起装置を左右方向に移動させる技術が知られていた。（特許文献３参照） Furthermore, in order to perform maintenance on the lifting device of the harvesting machine and the transport device, a technique was known in which the lifting device was moved left and right along a transmission tube that contained a rotating shaft that transmits the output rotation of the engine to the lifting device. (See Patent Document 3)

特開２００７－３７４４１号公報JP 2007-37441 A 特開２０１２－２９５６８号公報JP 2012-29568 A 特開２０１３－９６１１号公報JP 2013-9611 A

しかし、特許文献１の技術では、引起装置の下部を上方に引起す場合に、引起装置の上部と引起装置の上部を覆う保護カバーが干渉する恐れがあった。 However, with the technology of Patent Document 1, when the lower part of the lifting device is lifted upward, there is a risk that the upper part of the lifting device and the protective cover that covers the upper part of the lifting device may interfere with each other.

また、特許文献２の技術では、引起装置の上部を前方に引出す場合に、引起装置の上部と引起装置の上部を覆う保護カバーが干渉する恐れがあった。 In addition, with the technology of Patent Document 2, when the upper part of the lifting device is pulled forward, there is a risk that the upper part of the lifting device and the protective cover that covers the upper part of the lifting device may interfere with each other.

さらに、特許文献３の技術でも、引起装置を左右方向に移動する場合に、引起装置の上部と引起装置の上部を覆う保護カバーが擦れ合い干渉する恐れがあった。 Furthermore, even with the technology of Patent Document 3, when the lifting device is moved left and right, there is a risk of interference due to friction between the top of the lifting device and the protective cover that covers the top of the lifting device.

そこで、本発明の主たる課題は、刈取装置の上部と保護カバーの干渉を防止して、刈取装置のメンテナンスを容易に行うことができるコンバインを提供することにある。 The main objective of the present invention is to provide a combine harvester that prevents interference between the upper part of the harvesting device and the protective cover, and allows easy maintenance of the harvesting device.

上記課題を解決した本発明は次のとおりである。
すなわち、請求項１記載の発明は、エンジンを搭載した機体フレーム（１）の前側に刈取装置（３）を設け、該刈取装置（３）の後方左側に脱穀装置（４）を設けたコンバインにおいて、
前記刈取装置（３）を、圃場の穀稈を引起こす引起装置（２１）と、穀稈の株元を刈取る刈刃装置（２２）と、刈取られた穀稈を脱穀装置（４）に向けて搬送する搬送装置（２３）で形成し、前記引起装置（２１）の上方に左右方向に、前記エンジンの出力回転を伝動する回転軸を内装した延在する第１伝動筒（１４）を設け、前記引起装置（２１）の上部を覆う保護カバー（１６）を、前記第１伝動筒（１４）の前側に設け、前記保護カバー（１６）の下部が、前記引起装置（２１）の上部を覆う作業姿勢と、前記保護カバー（１６）の下部が、前記引起装置（２１）の上部から離間する待避姿勢を移動可能な構成に形成したことを特徴とするコンバインである。 The present invention, which has solved the above problems, is as follows.
That is, the invention described in claim 1 is a combine harvester in which a harvesting device (3) is provided in front of a machine frame (1) on which an engine is mounted, and a threshing device (4) is provided on the rear left side of the harvesting device (3),
The combine harvester is characterized in that the harvesting device (3) is formed of a lifting device (21) that lifts up the culms in the field, a cutting blade device (22) that cuts the base of the culms, and a transporting device (23) that transports the harvested culms toward a threshing device (4), a first transmission tube (14) that extends left and right above the lifting device (21) and has a rotating shaft installed therein that transmits the output rotation of the engine, a protective cover (16) that covers the upper part of the lifting device (21) is provided in front of the first transmission tube (14), and the lower part of the protective cover (16) is configured to be movable between a working position in which it covers the upper part of the lifting device (21) and a retracted position in which the lower part of the protective cover (16) is moved away from the upper part of the lifting device (21).

請求項２記載の発明は、前記保護カバー（１６）を、前記第１伝動筒（１４）に設けられた左右方向に延在する支軸（３０）に回転自在に支持し、前記支軸（３０）の右部に、前記支軸（３０）から所定の半径を隔てた位置に円弧状のガイド溝（３２）が形成されたガイドプレート（３１）を設け、前記保護カバー（１６）の右部に右側に向かって延在する操作レバー（３６）を設け、前記ガイド溝（３２）に操作レバー（３６）を挿通させ、前記操作レバー（３６）をガイド溝（３２）の後部から前部に操作して、前記保護カバー（１６）を作業姿勢から待避姿勢に移動させ、前記操作レバー（３６）をガイド溝（３２）の前部から後部に操作して、前記保護カバー（１６）を待避姿勢から作業姿勢に移動させる請求項１記載のコンバインである。 The invention described in claim 2 is a combine harvester according to claim 1, in which the protective cover (16) is rotatably supported on a support shaft (30) extending in the left-right direction provided on the first transmission tube (14), a guide plate (31) having an arc-shaped guide groove (32) formed at a position separated by a predetermined radius from the support shaft (30) is provided on the right part of the support shaft (30), an operating lever (36) extending toward the right side is provided on the right part of the protective cover (16), the operating lever (36) is inserted into the guide groove (32), the operating lever (36) is operated from the rear to the front of the guide groove (32) to move the protective cover (16) from the working position to the waiting position, and the operating lever (36) is operated from the front to the rear of the guide groove (32) to move the protective cover (16) from the waiting position to the working position.

請求項３記載の発明は、前記第１伝動筒（１４）と操作レバー（３６）を付勢手段で連結し、前記操作レバー（３６）の右端部に、前記ガイドプレート（３１）に係止する係止部材（３７）を設けた請求項２記載のコンバインである。 The invention described in claim 3 is the combine described in claim 2, in which the first transmission cylinder (14) and the operating lever (36) are connected by a biasing means, and a locking member (37) that locks onto the guide plate (31) is provided on the right end of the operating lever (36).

請求項４記載の発明は、前記保護カバー（１６）を、前記第１伝動筒（１４）の左部に設けられた上下方向に延在する左支軸（４０Ｌ）に左部が回転自在に支持された左保護カバー（１６Ｌ）と、前記第１伝動筒（１４）の右部に設けられた上下方向に延在する右支軸（４０Ｒ）に右部が回転自在に支持された右保護カバー（１６Ｒ）に分割し、前記左支軸（４０Ｌ）を支点に左保護カバー（１６Ｌ）の右部を前方に引出し、前記右支軸（４０Ｒ）を支点に右保護カバー（１６Ｒ）の左部を前方に引出して、前記左保護カバー（１６Ｌ）と右保護カバー（１６Ｒ）を作業姿勢から待避姿勢に移動させ、前記左支軸（４０Ｌ）を支点に左保護カバー（１６Ｌ）の右部を後方に戻し、前記右支軸（４０Ｒ）を支点に右保護カバー（１６Ｒ）の左部を後方に戻して、前記左保護カバー（１６Ｌ）と右保護カバー（１６Ｒ）を待避姿勢から作業姿勢に移動させる請求項１記載のコンバインである。 The invention described in claim 4 divides the protective cover (16) into a left protective cover (16L) whose left part is rotatably supported on a left support shaft (40L) extending in the vertical direction provided on the left part of the first transmission tube (14), and a right protective cover (16R) whose right part is rotatably supported on a right support shaft (40R) extending in the vertical direction provided on the right part of the first transmission tube (14), and the right part of the left protective cover (16L) is pulled forward with the left support shaft (40L) as a fulcrum, and the right support shaft (40R) is pulled forward with the right support shaft (40R) as a fulcrum. ) as a fulcrum, the left part of the right protective cover (16R) is pulled forward, the left protective cover (16L) and the right protective cover (16R) are moved from the working position to the waiting position, the right part of the left protective cover (16L) is returned rearward, and the left part of the right protective cover (16R) is returned rearward, the left part of the right protective cover (16R) is returned rearward, and the left protective cover (16L) and the right protective cover (16R) are moved from the waiting position to the working position.

請求項５記載の発明は、前記左保護カバー（１６Ｌ）の左右方向の長さと、前記右保護カバー（１６Ｒ）の左右方向の長さを同一長さに形成した請求項４記載のコンバインである。 The invention described in claim 5 is the combine described in claim 4, in which the left protective cover (16L) and the right protective cover (16R) are formed to have the same left-right length.

請求項６記載の発明は、前記第１伝動筒（１４）と左保護カバー（１６Ｌ）を左規制部材（４２Ｌ）で連結し、該左規制部材（４２Ｌ）の左部を第１伝動筒（１４）の左部に回転自在に支持し、前記左規制部材（４２Ｌ）の右部を左保護カバー（１６Ｌ）の後部に回転自在に支持し、前記第１伝動筒（１４）と右保護カバー（１６Ｒ）を右規制部材（４２Ｒ）で連結し、該右規制部材（４２Ｒ）の右部を第１伝動筒（１４）の右部に回転自在に支持し、前記右規制部材（４２Ｒ）の左部を右保護カバー（１６Ｒ）の後部に回転自在に支持した請求項５記載のコンバインである。 The invention described in claim 6 is the combine described in claim 5, in which the first transmission tube (14) and the left protective cover (16L) are connected by a left regulating member (42L), the left part of the left regulating member (42L) is rotatably supported on the left part of the first transmission tube (14), the right part of the left regulating member (42L) is rotatably supported on the rear part of the left protective cover (16L), the first transmission tube (14) and the right protective cover (16R) are connected by a right regulating member (42R), the right part of the right regulating member (42R) is rotatably supported on the right part of the first transmission tube (14), and the left part of the right regulating member (42R) is rotatably supported on the rear part of the right protective cover (16R).

請求項７記載の発明は、前記刈刃装置（２２）にエンジンの出力回転を伝動する回転軸を内装した延在する第２伝動筒（１２）に前方に延在する前後フレーム（５０）を設け、前記前後フレーム（５０）の前部に上方に向かって矩形状の固定プレート（５１）を設け、前記引起装置（２１）における左右方向の中間に設けられた隣接する引起装置（２１）の下部を揺動部品（５２）で連結し、前記固定プレート（５１）に揺動部品（５２）の矩形状の転プレート（５２Ａ）を左右方向に延在するピン（５３）を介して回転自在に支持し、前記固定プレート（５１）と回転プレート（５２Ａ）を着脱可能な締結部材（５４）で連結した請求項１記載のコンバインである。 The invention described in claim 7 is a combine harvester according to claim 1, in which a front-rear frame (50) extending forward is provided on the second transmission cylinder (12) that extends to the cutting blade device (22) and has a rotating shaft that transmits the output rotation of the engine inside, a rectangular fixed plate (51) is provided facing upward at the front of the front-rear frame (50), the lower part of the adjacent lifting device (21) provided in the middle of the left-right direction in the lifting device (21) is connected with a swinging part (52), a rectangular rolling plate (52A) of the swinging part (52) is rotatably supported on the fixed plate (51) via a pin (53) extending in the left-right direction, and the fixed plate (51) and the rotating plate (52A) are connected with a detachable fastening member (54).

請求項１記載の発明によれば、刈取装置（３）を、圃場の穀稈を引起こす引起装置（２１）と、穀稈の株元を刈取る刈刃装置（２２）と、刈取られた穀稈を脱穀装置（４）に向けて搬送する搬送装置（２３）で形成し、引起装置（２１）の上方に左右方向に、エンジンの出力回転を伝動する回転軸を内装した延在する第１伝動筒（１４）を設け、引起装置（２１）の上部を覆う保護カバー（１６）を、第１伝動筒（１４）の前側に設け、保護カバー（１６）の下部が、引起装置（２１）の上部を覆う作業姿勢と、保護カバー（１６）の下部が、引起装置（２１）の上部から離間する待避姿勢を移動可能な構成に形成したので、引起装置（２１）の上部と保護カバー（１６）の干渉を防止して、刈取装置（３）のメンテナンスを容易に行うことができる。 According to the invention described in claim 1, the harvesting device (3) is formed of a lifting device (21) that lifts the culms in the field, a cutting blade device (22) that cuts the base of the culms, and a transport device (23) that transports the harvested culms toward the threshing device (4). A first transmission tube (14) is provided above the lifting device (21) in the left-right direction, and a rotating shaft that transmits the output rotation of the engine is installed inside. A protective cover (16) that covers the upper part of the lifting device (21) is provided in front of the first transmission tube (14). The lower part of the protective cover (16) is configured to be movable between a working position in which it covers the upper part of the lifting device (21) and a retreat position in which the lower part of the protective cover (16) is separated from the upper part of the lifting device (21). This prevents interference between the upper part of the lifting device (21) and the protective cover (16), making it easy to perform maintenance on the harvesting device (3).

請求項２記載の発明によれば、請求項１記載の発明による効果に加えて、保護カバー（１６）を、第１伝動筒（１４）に設けられた左右方向に延在する支軸（３０）に回転自在に支持し、支軸（３０）の右部に、支軸（３０）から所定の半径を隔てた位置に円弧状のガイド溝（３２）が形成されたガイドプレート（３１）を設け、保護カバー（１６）の右部に右側に向かって延在する操作レバー（３６）を設け、ガイド溝（３２）に操作レバー（３６）を挿通させ、操作レバー（３６）をガイド溝（３２）の後部から前部に操作して、保護カバー（１６）を作業姿勢から待避姿勢に移動させ、操作レバー（３６）をガイド溝（３２）の前部から後部に操作して、保護カバー（１６）を待避姿勢から作業姿勢に移動させるので、支軸（３０）を支点として保護カバー（１６）を作業姿勢から待避姿勢に移動させて刈取装置（３）のメンテナンスをより容易に行うことができる。 According to the invention of claim 2, in addition to the effect of the invention of claim 1, the protective cover (16) is rotatably supported on a support shaft (30) extending in the left-right direction provided on the first transmission tube (14), a guide plate (31) having an arc-shaped guide groove (32) formed at a position separated by a predetermined radius from the support shaft (30) is provided on the right part of the support shaft (30), an operating lever (36) extending toward the right side is provided on the right part of the protective cover (16), the operating lever (36) is inserted into the guide groove (32), the operating lever (36) is operated from the rear to the front of the guide groove (32) to move the protective cover (16) from the working position to the waiting position, and the operating lever (36) is operated from the front to the rear of the guide groove (32) to move the protective cover (16) from the waiting position to the working position, so that the protective cover (16) can be moved from the working position to the waiting position with the support shaft (30) as a fulcrum, and maintenance of the harvesting device (3) can be performed more easily.

請求項３記載の発明によれば、請求項２記載の発明による効果に加えて、第１伝動筒（１４）と操作レバー（３６）を付勢手段で連結し、操作レバー（３６）の右端部に、ガイドプレート（３１）に係止する係止部材（３７）を設けたので、保護カバー（１６）の待避姿勢から作業姿勢への戻し忘れを抑制することができる。 According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the first transmission cylinder (14) and the operating lever (36) are connected by a biasing means, and a locking member (37) that locks onto the guide plate (31) is provided at the right end of the operating lever (36), so that forgetting to return the protective cover (16) from the standby position to the working position can be prevented.

請求項４記載の発明によれば、請求項１記載の発明による効果に加えて、保護カバー（１６）を、第１伝動筒（１４）の左部に設けられた上下方向に延在する左支軸（４０Ｌ）に左部が回転自在に支持された左保護カバー（１６Ｌ）と、第１伝動筒（１４）の右部に設けられた上下方向に延在する右支軸（４０Ｒ）に右部が回転自在に支持された右保護カバー（１６Ｒ）に分割し、左支軸（４０Ｌ）を支点に左保護カバー（１６Ｌ）の右部を前方に引出し、右支軸（４０Ｒ）を支点に右保護カバー（１６Ｒ）の左部を前方に引出して、左保護カバー（１６Ｌ）と右保護カバー（１６Ｒ）を作業姿勢から待避姿勢に移動させ、左支軸（４０Ｌ）を支点に左保護カバー（１６Ｌ）の右部を後方に戻し、右支軸（４０Ｒ）を支点に右保護カバー（１６Ｒ）の左部を後方に戻して、左保護カバー（１６Ｌ）と右保護カバー（１６Ｒ）を待避姿勢から作業姿勢に移動させるので、左支軸（４０Ｌ）を支点として左保護カバー（１６Ｌ）を作業姿勢から待避姿勢に移動させ、右支軸（４０Ｒ）を支点として右保護カバー（１６Ｒ）を作業姿勢から待避姿勢に移動させて刈取装置（３）のメンテナンスをより容易に行うことができる。 According to the invention of claim 4, in addition to the effects of the invention of claim 1, the protective cover (16) is divided into a left protective cover (16L) whose left part is rotatably supported on a left support shaft (40L) extending in the vertical direction provided on the left part of the first transmission tube (14), and a right protective cover (16R) whose right part is rotatably supported on a right support shaft (40R) extending in the vertical direction provided on the right part of the first transmission tube (14), and the right part of the left protective cover (16L) is pulled forward with the left support shaft (40L) as a fulcrum, and the left part of the right protective cover (16R) is pulled forward with the right support shaft (40R) as a fulcrum, to form the left protective cover (16L). The right protective cover (16R) is moved from the working position to the waiting position, the right part of the left protective cover (16L) is returned rearward using the left support shaft (40L) as a fulcrum, and the left part of the right protective cover (16R) is returned rearward using the right support shaft (40R) as a fulcrum, and the left protective cover (16L) and the right protective cover (16R) are moved from the waiting position to the working position. This makes it easier to perform maintenance on the harvesting device (3) by moving the left protective cover (16L) from the working position to the waiting position using the left support shaft (40L) as a fulcrum, and moving the right protective cover (16R) from the working position to the waiting position using the right support shaft (40R) as a fulcrum.

請求項５記載の発明によれば、請求項４記載の発明による効果に加えて、左保護カバー（１６Ｌ）の左右方向の長さと、右保護カバー（１６Ｒ）の左右方向の長さを同一長さに形成したので、左保護カバー（１６Ｌ）と右保護カバー（１６Ｒ）を作業姿勢から待避姿勢に移動させるのに必要なコンバインの前方の空間を小さくすることができる。 According to the invention described in claim 5, in addition to the effect of the invention described in claim 4, the left and right lengths of the left and right protective covers (16L and 16R) are made the same, so the space in front of the combine required to move the left and right protective covers (16L and 16R) from the working position to the sheltered position can be reduced.

請求項６記載の発明によれば、請求項５記載の発明による効果に加えて、第１伝動筒（１４）と左保護カバー（１６Ｌ）を左規制部材（４２Ｌ）で連結し、左規制部材（４２Ｌ）の左部を第１伝動筒（１４）の左部に回転自在に支持し、左規制部材（４２Ｌ）の右部を左保護カバー（１６Ｌ）の後部に回転自在に支持し、第１伝動筒（１４）と右保護カバー（１６Ｒ）を右規制部材（４２Ｒ）で連結し、右規制部材（４２Ｒ）の右部を第１伝動筒（１４）の右部に回転自在に支持し、右規制部材（４２Ｒ）の左部を右保護カバー（１６Ｒ）の後部に回転自在に支持したので、左保護カバー（１６Ｌ）と右保護カバー（１６Ｒ）がコンバインの前方に過度に引出されるのを抑制することができる。 According to the invention described in claim 6, in addition to the effect of the invention described in claim 5, the first transmission tube (14) and the left protective cover (16L) are connected by the left regulating member (42L), the left part of the left regulating member (42L) is rotatably supported on the left part of the first transmission tube (14), the right part of the left regulating member (42L) is rotatably supported on the rear part of the left protective cover (16L), the first transmission tube (14) and the right protective cover (16R) are connected by the right regulating member (42R), the right part of the right regulating member (42R) is rotatably supported on the right part of the first transmission tube (14), and the left part of the right regulating member (42R) is rotatably supported on the rear part of the right protective cover (16R), so that the left protective cover (16L) and the right protective cover (16R) can be prevented from being excessively pulled out in front of the combine.

請求項７記載の発明によれば、請求項１記載の発明による効果に加えて、刈刃装置（２２）にエンジンの出力回転を伝動する回転軸を内装した延在する第２伝動筒（１２）に前方に延在する前後フレーム（５０）を設け、前後フレーム（５０）の前部に上方に向かって矩形状の固定プレート（５１）を設け、引起装置（２１）における左右方向の中間に設けられた隣接する引起装置（２１）の下部を揺動部品（５２）で連結し、固定プレート（５１）に揺動部品（５２）の矩形状の回転プレート（５２Ａ）を左右方向に延在するピン（５３）を介して回転自在に支持し、固定プレート（５１）と回転プレート（５２Ａ）を着脱可能な締結部材（５４）で連結したので、左右方向の中間に設けられた隣接する引起装置（２１）の上部を前方に容易に引出すことができる。 According to the invention described in claim 7, in addition to the effect of the invention described in claim 1, a front-rear frame (50) extending forward is provided on the second transmission tube (12) extending from the blade device (22) and containing a rotating shaft for transmitting the output rotation of the engine, a rectangular fixed plate (51) is provided facing upward at the front of the front-rear frame (50), the lower part of the adjacent lifting device (21) provided in the middle of the left-right direction of the lifting device (21) is connected with a swinging part (52), the rectangular rotating plate (52A) of the swinging part (52) is rotatably supported on the fixed plate (51) via a pin (53) extending in the left-right direction, and the fixed plate (51) and the rotating plate (52A) are connected with a detachable fastening member (54), so that the upper part of the adjacent lifting device (21) provided in the middle of the left-right direction can be easily pulled forward.

コンバインの左側面図である。FIG. 第１実施形態の刈取装置の右側面図である。FIG. 2 is a right side view of the harvesting device of the first embodiment. 同実施形態の刈取装置の正面図である。FIG. 2 is a front view of the harvesting device according to the embodiment. 作業姿勢に移動した保護カバーの右側面図である。FIG. 13 is a right side view of the protective cover moved to the working position. 待避姿勢に移動した保護カバーの右側面図である。13 is a right side view of the protective cover moved to the standby position. FIG. 保護カバーの操作レバーの正面図である。FIG. 4 is a front view of the operating lever of the protective cover. 第２実施形態の刈取装置の正面図であり、左右の保護カバーは待避姿勢に移動している。13 is a front view of a harvesting device according to a second embodiment, with the left and right protective covers moved to the standby position. FIG. 左保護カバーを待避姿勢に移動した左側面図であり、左保護カバーは待避姿勢に移動している。11 is a left side view showing the left protective cover moved to the retracted position; FIG. 右保護カバーを待避姿勢に移動した右側面図であり、右保護カバーは待避姿勢に移動している。13 is a right side view showing the right protective cover moved to the standby position, in which the right protective cover has been moved to the standby position; FIG. 右保護カバーの右揺動部材の正面図である。FIG. 4 is a front view of the right pivot member of the right protective cover. 右保護カバーの右揺動部材の右側面図である。FIG. 13 is a right side view of the right swing member of the right protective cover. 引起装置の上部を前後方向に揺動させる揺動部品の左側面図である。13 is a left side view of a swinging part that swings an upper part of the lifting device in the front-rear direction. FIG. 前方に上部を引出した引起装置の正面図である。FIG. 4 is a front view of the lifting device with its upper portion pulled out forward. 前方に上部を引出した引起装置の左側面図である。FIG. 4 is a left side view of the lifting device with its upper portion pulled out forward. （ａ）、（ｂ）は固定プレート、（ｃ）、（ｄ）は回転プレート、（ｅ）、（ｆ）はピンの断面図と左側面図である。13A and 13B are views of a fixed plate, 13C and 13D are views of a rotating plate, and 13E and 13F are views of a pin in cross section and left side view. 脱穀装置のフィードチェンの左側面図である。FIG. 2 is a left side view of the feed chain of the threshing apparatus.

図１に示すように、コンバインは、機体フレーム１の下側に土壌面を走行する左右一対のクローラからなる走行装置２が設けられ、機体フレーム１の前側に圃場の穀稈を収穫する刈取装置３が設けられている。また、刈取装置３の後方左側に刈取装置３で収穫された穀稈を脱穀・選別処理する脱穀装置４が設けられ、刈取装置３の後方右側に作業者が搭乗する操縦部５が設けられている。 As shown in FIG. 1, the combine harvester is provided with a traveling device 2 consisting of a pair of left and right crawlers that travel on the soil surface on the underside of the machine frame 1, and a harvesting device 3 that harvests the stalks in the field is provided on the front side of the machine frame 1. In addition, a threshing device 4 that threshes and sorts the stalks harvested by the harvesting device 3 is provided on the rear left side of the harvesting device 3, and a control unit 5 on which an operator rides is provided on the rear right side of the harvesting device 3.

操縦部５の下側には、エンジン搭載するエンジンルームが設けられ、操縦部５の後側には、脱穀装置４で脱穀・選別処理された穀粒を貯留するグレンタンク７が設けられ、グレンタンク７に貯留された穀粒は、グレンタンク７に連結された排出オーガ８によって外部に排出される。 Below the control unit 5 is an engine room where the engine is mounted, and behind the control unit 5 is a grain tank 7 that stores the grains that have been threshed and sorted by the threshing device 4. The grains stored in the grain tank 7 are discharged to the outside by a discharge auger 8 connected to the grain tank 7.

＜第１実施形態の刈取装置＞
図１～３に示すように、第１実施形態の刈取装置３は、主枠となる刈取フレーム１０に取付けられている。刈取フレーム１０は、前後方向に延在する伝動筒１１と、伝動筒１１の前部に設けられた左右方向に延在する伝動筒（請求項の「第２伝動筒」）１２と、伝動筒１２の左部に設けられた上下方向に延在する伝動筒１３と、伝動筒１３の上部に設けられた左右方向に延在する伝動筒（請求項の「第１伝動筒」）１４から形成されている。また、伝動筒１１の後部は、エンジンの出力回転が伝動される脱穀装置４の前側に設けられた左右方向に延在する伝動筒１５に揺動可能に支持され、伝動筒１４の前側には、前後方向の縦断面が円弧状に形成された保護カバー１６が設けられている。これにより、伝動筒１１に連結された昇降シリンダ（図示省略）を駆動して伝動筒１１の前部、すなわち、昇降シリンダを駆動して刈取装置３を上下方向に昇降させることができる。なお、伝動筒１１～１５の内部には、エンジン等の出力回転が伝動される回転軸が設けられている。 <Reaping device of first embodiment>
As shown in Figs. 1 to 3, the harvesting device 3 of the first embodiment is attached to a harvesting frame 10, which is a main frame. The harvesting frame 10 is formed of a transmission tube 11 extending in the front-rear direction, a transmission tube (a "second transmission tube" in the claims) 12 extending in the left-right direction provided at the front of the transmission tube 11, a transmission tube 13 extending in the up-down direction provided at the left of the transmission tube 12, and a transmission tube (a "first transmission tube" in the claims) 14 extending in the left-right direction provided at the top of the transmission tube 13. The rear part of the transmission tube 11 is supported so as to be swingable by a transmission tube 15 extending in the left-right direction provided at the front of the threshing device 4 to which the output rotation of the engine is transmitted, and a protective cover 16 having a longitudinal cross section formed in an arc shape is provided at the front side of the transmission tube 14. As a result, the harvesting device 3 can be raised and lowered in the up-down direction by driving a lifting cylinder (not shown) connected to the transmission tube 11 to drive the front part of the transmission tube 11, i.e., the lifting cylinder. Inside the transmission cylinders 11 to 15, a rotating shaft is provided to transmit the output rotation of an engine or the like.

刈取装置３は、圃場に植立する穀稈を分草する分草体２０と、分草された穀稈を引起こす引起装置２１と、引起こされた穀稈を刈取る刈刃装置２２と、刈取られた穀稈を挟持して脱穀装置４に搬送する搬送装置２３から形成されている。 The harvesting device 3 is composed of a grass dividing body 20 that divides the culms planted in the field, a lifting device 21 that raises the divided culms, a cutting blade device 22 that cuts the raised culms, and a transport device 23 that clamps the cut culms and transports them to the threshing device 4.

引起装置２１は、５個の引起装置２１Ａ～２１Ｅから形成され、引起装置２１Ｂの引起こし反対側の右部と引起装置２１Ｃの引起こし反対側の左部は連結部材（図示省略）で連結されている。これにより、引起装置２１Ａ，２１Ｂの間で２条、引起装置２１Ｃ，２１Ｄの間で２条、引起装置２１Ｄ，２１Ｅの間で１条の計５条の穀稈を同時に引起こすことができる。 The lifting device 21 is made up of five lifting devices 21A to 21E, and the right side of lifting device 21B on the opposite side to the lifting side and the left side of lifting device 21C on the opposite side to the lifting side are connected by a connecting member (not shown). This allows a total of five rows of stalks to be lifted simultaneously: two rows between lifting devices 21A and 21B, two rows between lifting devices 21C and 21D, and one row between lifting devices 21D and 21E.

図４～６に示すように、伝動筒１４の右端部には、右方に延在する支軸３０が設けられている。支軸３０の右部には、ガイドプレート３１が支持され、ガイドプレート３１には、支軸３０から所定の半径を隔てた位置に円弧状のガイド溝３２が形成されている。なお、ガイド溝３２の前部には、ガイド溝３２の幅よりも径が大きい大径穴３３が形成されている。なお、支軸は、伝動筒１４の右端部から右方に延在する支軸３０と、伝動筒１４の左端部から左方に延在する支軸（図示省略）から形成されている。 As shown in Figures 4 to 6, a support shaft 30 extending to the right is provided at the right end of the transmission tube 14. A guide plate 31 is supported on the right side of the support shaft 30, and an arc-shaped guide groove 32 is formed in the guide plate 31 at a position spaced a predetermined radius from the support shaft 30. A large-diameter hole 33 having a diameter larger than the width of the guide groove 32 is formed in front of the guide groove 32. The support shaft is formed of the support shaft 30 extending to the right from the right end of the transmission tube 14 and a support shaft (not shown) extending to the left from the left end of the transmission tube 14.

保護カバー１６の内周部の右端部には、下方に延在するアームプレート３５が設けられている。アームプレート３５の上部は、支軸３０に回転自在に支持され、アームプレート３５の下部には、作業姿勢から待避姿勢や待避姿勢から作業姿勢に保護カバー１６を移動させる右方に延在する操作レバー３６が設けられている。また、操作レバー３６の右部には、ノブボルト等の係止部材３７を着脱可能なネジが形成されている。なお、アームプレートは、保護カバー１６の内周部の右端部から下方に延在するアームプレート３５と、保護カバー１６の内周部の左端部から下方に延在するアームプレート（図示省略）から形成され、アームプレートの上部は、伝動筒１４の左端部から左方に延在する支軸に回転自在に支持されている。 The right end of the inner circumference of the protective cover 16 is provided with an arm plate 35 extending downward. The upper part of the arm plate 35 is rotatably supported by the support shaft 30, and the lower part of the arm plate 35 is provided with an operating lever 36 extending to the right for moving the protective cover 16 from the working position to the retracted position and from the retracted position to the working position. In addition, a screw is formed on the right part of the operating lever 36 to which a locking member 37 such as a knob bolt can be attached and detached. The arm plate is formed of the arm plate 35 extending downward from the right end of the inner circumference of the protective cover 16 and an arm plate (not shown) extending downward from the left end of the inner circumference of the protective cover 16, and the upper part of the arm plate is rotatably supported by a support shaft extending leftward from the left end of the transmission tube 14.

伝動筒１４の右端部とアームプレート３５の上部は、バネ等の付勢手段（図示省略）で接続されている。これにより、保護カバー１６を待避姿勢から作業姿勢に移動させて、待避姿勢の場合に、保護カバー１６の下部の後面を引起装置２１Ａ～２１Ｅの上部の前面に当接させて、保護カバー１６の下部の後面を引起装置２１Ａ～２１Ｅの上部の前面の間の隙間を抑制することができる。 The right end of the transmission tube 14 and the upper part of the arm plate 35 are connected by a biasing means (not shown) such as a spring. This allows the protective cover 16 to be moved from the standby position to the working position, and when in the standby position, the rear surface of the lower part of the protective cover 16 can be brought into contact with the front surfaces of the upper parts of the lifting devices 21A to 21E, thereby reducing the gap between the rear surface of the lower part of the protective cover 16 and the front surfaces of the upper parts of the lifting devices 21A to 21E.

ガイド溝３２の後部から前部に操作レバー３６を操作した後に、ガイドプレート３１に係止部材３７を係合させて、保護カバー１６を作業姿勢から待避姿勢に移動させ、保護カバー１６の下部と引起装置２１Ａ～２１Ｅの上部を離間させて所定の隙間を形成することができる。これにより、引起装置２１Ａ～２１Ｅの上部を前方に引出して、引起装置２１Ａ～２１Ｅのラグ等に絡み付いた穀稈の除去等を容易に行うことができる。 After operating the operating lever 36 from the rear to the front of the guide groove 32, the locking member 37 is engaged with the guide plate 31, the protective cover 16 is moved from the working position to the waiting position, and the lower part of the protective cover 16 is separated from the upper part of the lifting device 21A-21E to form a specified gap. This makes it possible to easily remove stalks entangled in the lugs of the lifting device 21A-21E by pulling the upper part of the lifting device 21A-21E forward.

また、ガイドプレート３１と係止部材３７の係合を解除して後に、ガイド溝３２の前部から後部に操作レバー３６を操作して、保護カバー１６を待避姿勢から作業姿勢に移動させ、保護カバー１６の下部と引起装置２１Ａ～２１Ｅの上部を密着させることができる。これにより、刈取作業時に、引起装置２１Ａ～２１Ｅの上部と保護カバー１６の隙間から藁屑等が後部に侵入して伝動筒１４等に堆積するのを抑制することができる。 After disengaging the guide plate 31 from the locking member 37, the operating lever 36 can be operated from the front to the rear of the guide groove 32 to move the protective cover 16 from the standby position to the working position, and the lower part of the protective cover 16 can be brought into close contact with the upper part of the lifting device 21A-21E. This makes it possible to prevent straw and other debris from entering the rear through the gap between the upper part of the lifting device 21A-21E and the protective cover 16 during harvesting work and accumulating in the transmission tube 14, etc.

＜第２実施形態の刈取装置＞
図７には、第２実施形態の刈取装置３が図示されている。第１実施形態の刈取装置３と同一部材には同一番号を付して説明を省略する。 <Reaping device of second embodiment>
A reaping device 3 according to a second embodiment is shown in Fig. 7. The same members as those in the reaping device 3 according to the first embodiment are given the same reference numbers and the description thereof will be omitted.

引起装置２１は、６個の引起装置２１Ａ～２１Ｆから形成され、引起装置２１Ｂの引起こし反対側の右部と引起装置２１Ｃの引起こし反対側の左部は連結部材（図示省略）で連結され、引起装置２１Ｄの引起こし反対側の右部と引起装置２１Ｅの引起こし反対側の左部は連結部材（図示省略）で連結されている。これにより、引起装置２１Ａ，２１Ｂの間で２条、引起装置２１Ｃ，２１Ｄの間で２条、引起装置２１Ｅ，２１Ｆの間で２条の計６条の穀稈を同時に引起こすことができる。 The lifting device 21 is made up of six lifting devices 21A-21F, with the right side of lifting device 21B connected to the left side of lifting device 21C with a connecting member (not shown), and the right side of lifting device 21D connected to the left side of lifting device 21E with a connecting member (not shown). This allows a total of six rows of stalks to be lifted simultaneously: two rows between lifting devices 21A and 21B, two rows between lifting devices 21C and 21D, and two rows between lifting devices 21E and 21F.

図８～１１に示すように、伝動筒１４の前側には、保護カバー１６が設けられている。保護カバー１６は、左保護カバー１６Ｌと右保護カバー１６Ｒに左右方向で２分割されている。左保護カバー１６Ｌの左部は、伝動筒１４の左端部の前面に設けられた上下方向に延在する左支軸４０Ｌに回転自在に支持された左揺動部材４１Ｌの前面に固定されている。また、右保護カバー１６Ｒの右部は、伝動筒１４の右端部の前面に設けられた上下方向に延在する右支軸４０Ｒに回転自在に支持された右揺動部材４１Ｒの前面に固定されている。 As shown in Figures 8 to 11, a protective cover 16 is provided on the front side of the transmission tube 14. The protective cover 16 is divided in two in the left-right direction into a left protective cover 16L and a right protective cover 16R. The left part of the left protective cover 16L is fixed to the front of a left swinging member 41L that is rotatably supported by a left support shaft 40L that is provided on the front of the left end of the transmission tube 14 and extends in the vertical direction. The right part of the right protective cover 16R is fixed to the front of a right swinging member 41R that is rotatably supported by a right support shaft 40R that is provided on the front of the right end of the transmission tube 14 and extends in the vertical direction.

左揺動部材４１Ｌを介して左支軸４０Ｌを中心として左保護カバー１６Ｌの右部を前方に、右揺動部材４１Ｒを介して右支軸４０Ｒを中心として右保護カバー１６Ｒの左部を前方に引き出して、左保護カバー１６Ｌと右保護カバー１６Ｒの下部と引起装置２１Ａ～２１Ｆの上部を離間させることができる。これにより、引起装置２１Ａ～２１Ｆの上部を前方に引出して、引起装置２１Ａ～２１Ｆのラグ等に絡み付いた穀稈の除去等を容易に行うことができる。 The right part of the left protective cover 16L can be pulled forward around the left support shaft 40L via the left swinging member 41L, and the left part of the right protective cover 16R can be pulled forward around the right support shaft 40R via the right swinging member 41R, separating the lower parts of the left protective cover 16L and the right protective cover 16R from the upper parts of the lifting devices 21A-21F. This makes it easy to remove stalks entangled in the lugs of the lifting devices 21A-21F by pulling the upper parts of the lifting devices 21A-21F forward.

左揺動部材４１Ｌを介して左支軸４０Ｌを中心として左保護カバー１６Ｌの右部を後方に、右揺動部材４１Ｒを介して右支軸４０Ｒを中心として右保護カバー１６Ｒの左部を後方に戻して、左保護カバー１６Ｌと右保護カバー１６Ｒの下部と引起装置２１Ａ～２１Ｆの上部を密着させることができる。これにより、刈取作業時に、引起装置２１Ａ～２１Ｆの上部と左保護カバー１６Ｌと右保護カバー１６Ｒの隙間から藁屑等が後部に侵入して伝動筒１４等に堆積するのを抑制することができる。 The right part of the left protective cover 16L can be moved rearward around the left support shaft 40L via the left swinging member 41L, and the left part of the right protective cover 16R can be moved rearward around the right support shaft 40R via the right swinging member 41R, so that the lower parts of the left protective cover 16L and the right protective cover 16R are tightly attached to the upper parts of the lifting devices 21A-21F. This makes it possible to prevent straw chips and the like from entering the rear part through the gap between the upper parts of the lifting devices 21A-21F and the left protective cover 16L and right protective cover 16R and accumulating on the transmission tube 14, etc., during harvesting work.

伝動筒１４の左部と左保護カバー１６Ｌの内周部は、前方への引き出し範囲を所定の範囲に規制する左規制部材４２Ｌで連結されている。また、伝動筒１４の右部と右保護カバー１６Ｒの内周部は、前方への引き出し範囲を所定の範囲に規制する右規制部材４２Ｒで連結されている。これにより、左揺動部材４１Ｌを介して左支軸４０Ｌを中心として左保護カバー１６Ｌの右部を前方に、右揺動部材４１Ｒを介して右支軸４０Ｒを中心として右保護カバー１６Ｒの左部を前方に引き出す範囲を規制することができ外部の木等との衝突を防止することができる。なお、左規制部材４２Ｌの両端部は、それぞれ伝動筒１４の左部と左保護カバー１６Ｌの内周部に回転自在に支持され、右規制部材４２Ｒの両端部は、それぞれ伝動筒１４の右部と右保護カバー１６Ｒの内周部に回転自在に支持されている。 The left part of the transmission tube 14 and the inner periphery of the left protective cover 16L are connected by a left regulating member 42L that regulates the forward pull-out range to a predetermined range. The right part of the transmission tube 14 and the inner periphery of the right protective cover 16R are connected by a right regulating member 42R that regulates the forward pull-out range to a predetermined range. This regulates the range in which the right part of the left protective cover 16L is pulled forward around the left support shaft 40L via the left swinging member 41L, and the left part of the right protective cover 16R is pulled forward around the right support shaft 40R via the right swinging member 41R, preventing collision with external trees, etc. In addition, both ends of the left regulating member 42L are rotatably supported by the left part of the transmission tube 14 and the inner periphery of the left protective cover 16L, respectively, and both ends of the right regulating member 42R are rotatably supported by the right part of the transmission tube 14 and the inner periphery of the right protective cover 16R, respectively.

図７に図示した左保護カバー１６Ｌと右保護カバー１６Ｒの左右方向の長さは同一長さに形成しているが、左保護カバー１６Ｌの左右方向の長さを右保護カバー１６Ｒの左右方向の長さよりも長く形成したり、左保護カバー１６Ｌの左右方向の長さを右保護カバー１６Ｒの左右方向の長さよりも短く形成することもできる。 The left protective cover 16L and the right protective cover 16R shown in FIG. 7 are formed to have the same length in the left-right direction, but the left protective cover 16L may be formed to have a longer length in the left-right direction than the right protective cover 16R, or the left protective cover 16L may be formed to have a shorter length in the left-right direction than the right protective cover 16R.

また、保護カバー１６を左右方向に３分割して形成することもできる。この場合、左保護カバー１６Ｌと右保護カバー１６Ｒの間に位置する中間保護カバー（図示省略）は、伝動筒１４にボルト等の締結手段により着脱自在に装着される。 The protective cover 16 can also be divided into three parts in the left-right direction. In this case, the intermediate protective cover (not shown) located between the left protective cover 16L and the right protective cover 16R is detachably attached to the transmission tube 14 by fastening means such as bolts.

＜揺動部品＞
図１２に示すように、第１実施形態の刈取装置３の場合には、伝動筒１２における引起装置２１Ｂ，２１Ｃの左右方向の中間の後部に位置する部位に、前方に延在する前後フレーム５０が設けられている。前後フレーム５０における前側部には上側に向けて左右一対の略矩形状の固定プレート５１が立設されている。なお、第２実施形態の刈取装置３の場合には、伝動筒１２における引起装置２１Ｂ，２１Ｃの左右方向の中間の後部と引起装置２１Ｄ，２１Ｅの左右方向の中間の後部に位置する部位に、それぞれ前方に延在する前後フレーム５０が設けられる。 <Swinging parts>
As shown in Fig. 12, in the case of the harvesting device 3 of the first embodiment, a front-rear frame 50 extending forward is provided at a portion of the transmission tube 12 located at the rear midway between the lifting devices 21B and 21C in the left-right direction. A pair of left and right substantially rectangular fixing plates 51 are erected facing upward on the front side of the front-rear frame 50. In the case of the harvesting device 3 of the second embodiment, a front-rear frame 50 extending forward is provided at a portion of the transmission tube 12 located at the rear midway between the lifting devices 21B and 21C in the left-right direction and at the rear midway between the lifting devices 21D and 21E in the left-right direction.

固定プレート５１の前部には、揺動部品５２が回転自在に支持されている。揺動部品５２は、左右一対の固定プレート５１の間に設けられた矩形状の回転プレート５２Ａと、回転プレート５２Ａの上部から後側上方に向かって延在する延在部５２Ｂと、延在部５２Ｂの後部から左右方向に延在する連結部５２Ｃから形成されている。また、連結部５２Ｃの左部は引起装置２１Ｂの後面の下部に連結され、連結部５２Ｃの右部は引起装置２１Ｃの後面の下部に連結されている。 A swinging part 52 is rotatably supported on the front of the fixed plate 51. The swinging part 52 is formed of a rectangular rotating plate 52A provided between the pair of left and right fixed plates 51, an extension part 52B extending from the top of the rotating plate 52A toward the rear and upward, and a connecting part 52C extending in the left-right direction from the rear of the extension part 52B. The left part of the connecting part 52C is connected to the lower part of the rear surface of the lifting device 21B, and the right part of the connecting part 52C is connected to the lower part of the rear surface of the lifting device 21C.

固定プレート５１における前側下部に形成された開口部５１ａと回転プレート５２Ａにおける前側下部に形成された開口部５２ａには、ピン５３が挿通され、固定プレート５１の後部に形成されたネジ部５１ｂと回転プレート５２Ａの後部に形成された開口部５２ｂにはボルト等の締結部材５４が挿通されている。これにより、図１３，１４に示すように、前方に引起装置２１Ｂ，２１Ｃの上部を前方に引き出す場合には、締結部材５４を取外し、揺動部品５２をピン５３を中心として反時計方向に回転させて、引起装置２１Ｂ，２１Ｃの上部を前方に引き出して搬送装置２３の前側に大きな作業空間を形成して、搬送装置２３に詰まった穀稈の除去作業を効率良く行うことができる。 A pin 53 is inserted through the opening 51a formed in the front lower part of the fixed plate 51 and the opening 52a formed in the front lower part of the rotating plate 52A, and a fastening member 54 such as a bolt is inserted through the screw portion 51b formed in the rear part of the fixed plate 51 and the opening 52b formed in the rear part of the rotating plate 52A. As a result, as shown in Figures 13 and 14, when the upper part of the lifting device 21B, 21C is pulled forward, the fastening member 54 is removed and the swinging part 52 is rotated counterclockwise around the pin 53, and the upper part of the lifting device 21B, 21C is pulled forward to form a large working space in front of the conveying device 23, and the work of removing the stalks stuck in the conveying device 23 can be performed efficiently.

ピン５３には、ストレートピン、段付きピン、ストレートピンの一側に折曲げ部を形成したＬ字ピン等を使用することができる。ストレートピンを使用する場合には、ストレートピンの両端部に貫通孔を形成してスナップピンや割りピンを挿通するのが好ましい。また、段付きピンを使用する場合には、固定プレート５１の側面に段付きピンの段差部が侵入するザグリを形成し、段付きピンの段差部が形成されていない他側に貫通孔を形成してスナップピンや割りピンを挿通するのが好ましい。さらに、Ｌ字ピンを使用する場合には、固定プレート５１の側面にＬ字ピンの折曲げ部が係合する係合部（図示省略）を設け、Ｌ字ピンの折曲げ部が形成されていない他側に貫通孔を形成してスナップピンや割りピンを挿通するのが好ましい。これにより、ピン５３が、固定プレート５１と回転プレート５２Ａの開口部５１ａ，５２ａから脱落するのを防止することができる。 The pin 53 may be a straight pin, a stepped pin, or an L-shaped pin with a bent portion formed on one side of the straight pin. When using a straight pin, it is preferable to form through holes at both ends of the straight pin and insert a snap pin or a split pin. When using a stepped pin, it is preferable to form a countersink into which the stepped portion of the stepped pin enters on the side of the fixed plate 51, and to form a through hole on the other side where the stepped portion of the stepped pin is not formed, and to insert a snap pin or a split pin. Furthermore, when using an L-shaped pin, it is preferable to provide an engagement portion (not shown) on the side of the fixed plate 51 with which the bent portion of the L-shaped pin engages, and to form a through hole on the other side where the bent portion of the L-shaped pin is not formed, and to insert a snap pin or a split pin. This makes it possible to prevent the pin 53 from falling out of the openings 51a and 52a of the fixed plate 51 and the rotating plate 52A.

また、図１５（ａ），（ｂ）に示すように、ピン５３の両端部に径方向に突出する突起部５３ａを形成することができる。このピン５３を使用する場合には、図１５（ｃ），（ｄ）に示すように、回転プレート５２Ａの開口部５２ａに突起部５３ａを挿通する径方向に延在する溝部５２ｃを形成し、図１５（ｅ），（ｆ）に示すように、固定プレート５１の開口部５１ａに突起部５３ａを挿通する径方向に延在する溝部５１ｃを形成する。これにより、ピン５３を固定プレート５１の開口部５１ａと回転プレート５２Ａの開口部５２ａに挿通させた後に、ピン５３を軸心回りに回転させてピン５３を容易に固定することができる。 As shown in Figs. 15(a) and (b), protrusions 53a protruding in the radial direction can be formed on both ends of the pin 53. When using this pin 53, as shown in Figs. 15(c) and (d), a groove 52c extending in the radial direction is formed in the opening 52a of the rotating plate 52A through which the protrusion 53a is inserted, and as shown in Figs. 15(e) and (f), a groove 51c extending in the radial direction is formed in the opening 51a of the fixed plate 51 through which the protrusion 53a is inserted. This makes it possible to easily fix the pin 53 by rotating it around the axis after inserting the pin 53 into the opening 51a of the fixed plate 51 and the opening 52a of the rotating plate 52A.

＜フィードチェンの駆動スプロケット＞
図１６に示すように、脱穀装置４の前部から後部に穀稈を搬送するフィードチェン６０にエンジンの出力回転を伝動する駆動用スプロケット６１は、脱穀装置４の前壁の前側に設けられたエンジンの出力回転を脱穀装置４に伝動する左右方向に延在するカウンタ軸６２の上側に設けられている。また、上下方向における駆動用スプロケット６１とカウンタ軸６２の間には、フィードチェン６０等に油を給油する給油ガード６３が設けられている。これにより、脱穀装置４の前部に形成された空間を有効に活用することができる。なお、駆動用スプロケット６１の前側には、フィードチェン６０の張力を調整するテンションローラ６４が設けられている。 <Feed chain drive sprocket>
As shown in Figure 16, the drive sprocket 61, which transmits the output rotation of the engine to the feed chain 60 that transports the stalks from the front to the rear of the threshing device 4, is provided above a counter shaft 62 extending in the left-right direction that transmits the output rotation of the engine to the threshing device 4, which is provided in front of the front wall of the threshing device 4. In addition, an oil supply guard 63 that supplies oil to the feed chain 60, etc. is provided between the drive sprocket 61 and the counter shaft 62 in the vertical direction. This makes it possible to effectively utilize the space formed in the front part of the threshing device 4. In addition, a tension roller 64 that adjusts the tension of the feed chain 60 is provided in front of the drive sprocket 61.

１機体フレーム
３刈取装置
４脱穀装置
１２伝動筒（第２伝動筒）
１４伝動筒（第１伝動筒）
１６保護カバー
１６Ｌ左保護カバー
１６Ｒ右保護カバー
２１引起装置
２２刈刃装置
２３搬送装置
３０支軸
３１ガイドプレート
３２ガイド溝
３６操作レバー
３７係止部材
４０Ｌ左支軸
４０Ｒ右支軸
４２Ｌ左規制部材
４２Ｒ右規制部材
５０前後フレーム
５１固定プレート
５２揺動部品
５２Ａ回転プレート
５３ピン
５４締結部材 1 Machine frame 3 Harvesting device 4 Threshing device 12 Transmission tube (second transmission tube)
14 Transmission cylinder (first transmission cylinder)
Reference Signs List 16: Protective cover 16L, left protective cover 16R, right protective cover 21: Raising device 22: Cutting blade device 23: Conveying device 30: Support shaft 31: Guide plate 32: Guide groove 36: Operating lever 37: Locking member 40L, left support shaft 40R, right support shaft 42L, left regulating member 42R, right regulating member 50: Front and rear frames 51: Fixing plate 52: Swinging part 52A: Rotating plate 53: Pin 54: Fastening member

Claims

A combine harvester having a harvesting device (3) provided at the front of a machine frame (1) on which an engine is mounted, and a threshing device (4) provided at the rear left side of the harvesting device (3),
The reaping device (3) is formed of a raising device (21) for raising the culms in the field, a cutting blade device (22) for reaping the base of the culms, and a conveying device (23) for conveying the reaped culms toward a threshing device (4),
A first transmission cylinder (14) is provided above the lifting device (21) in the left-right direction and extends in the left-right direction, and the first transmission cylinder (14) has a rotary shaft mounted therein for transmitting the output rotation of the engine.
A protective cover (16) for covering an upper portion of the lifting device (21) is provided on the front side of the first transmission cylinder (14);
This combine harvester is characterized in that the lower part of the protective cover (16) is configured to be movable between a working position in which the lower part of the protective cover (16) covers the upper part of the lifting device (21) and a retreated position in which the lower part of the protective cover (16) is separated from the upper part of the lifting device (21).

The protective cover (16) is rotatably supported on a support shaft (30) extending in the left-right direction and provided on the first transmission cylinder (14),
a guide plate (31) having an arc-shaped guide groove (32) formed at a position spaced a predetermined radius from the support shaft (30) on the right side of the support shaft (30);
An operating lever (36) is provided on the right side of the protective cover (16) and extends rightward.
An operating lever (36) is inserted into the guide groove (32),
2. A combine harvester as described in claim 1, wherein the operating lever (36) is operated from the rear to the front of the guide groove (32) to move the protective cover (16) from a working position to a waiting position, and the operating lever (36) is operated from the front to the rear of the guide groove (32) to move the protective cover (16) from the waiting position to the working position.

The combine harvester according to claim 2, in which the first transmission cylinder (14) and the operating lever (36) are connected by a biasing means, and a locking member (37) that locks to the guide plate (31) is provided at the right end of the operating lever (36).

The protective cover (16) is divided into a left protective cover (16L) whose left part is rotatably supported on a left support shaft (40L) extending in the vertical direction and provided on the left part of the first transmission cylinder (14), and a right protective cover (16R) whose right part is rotatably supported on a right support shaft (40R) extending in the vertical direction and provided on the right part of the first transmission cylinder (14),
2. The combine harvester according to claim 1, wherein the right part of the left protective cover (16L) is pulled forward using the left support shaft (40L) as a fulcrum, the left part of the right protective cover (16R) is pulled forward using the right support shaft (40R) as a fulcrum, the left protective cover (16L) and the right protective cover (16R) are moved from the working position to the waiting position, the right part of the left protective cover (16L) is returned rearward using the left support shaft (40L) as a fulcrum, and the left part of the right protective cover (16R) is returned rearward using the right support shaft (40R) as a fulcrum, and the left protective cover (16L) and the right protective cover (16R) are moved from the waiting position to the working position.

The combine harvester according to claim 4, in which the left protective cover (16L) and the right protective cover (16R) are formed to have the same left-right length.

The first transmission cylinder (14) and the left protective cover (16L) are connected by a left regulating member (42L), a left portion of the left regulating member (42L) is rotatably supported on a left portion of the first transmission cylinder (14), and a right portion of the left regulating member (42L) is rotatably supported on a rear portion of the left protective cover (16L),
A combine harvester as described in claim 5, wherein the first transmission cylinder (14) and the right protective cover (16R) are connected by a right regulating member (42R), the right portion of the right regulating member (42R) is rotatably supported on the right portion of the first transmission cylinder (14), and the left portion of the right regulating member (42R) is rotatably supported on the rear portion of the right protective cover (16R).

A front-rear frame (50) extending forward is provided on a second transmission cylinder (12) that has a rotary shaft mounted therein for transmitting the output rotation of the engine to the cutting blade device (22);
A rectangular fixing plate (51) is provided on the front part of the front and rear frame (50) facing upward,
The lower parts of adjacent lifting devices (21) provided in the middle of the left-right direction of the lifting devices (21) are connected by a swinging part (52),
A rectangular rotating plate (52A) of a swinging part (52) is rotatably supported on the fixed plate (51) via a pin (53) extending in the left-right direction,
2. The combine harvester according to claim 1, wherein the fixed plate (51) and the rotating plate (52A) are connected by a detachable fastening member (54).