WO2023120298A1

WO2023120298A1 - Work machine

Info

Publication number: WO2023120298A1
Application number: PCT/JP2022/045817
Authority: WO
Inventors: 竹内宏行
Original assignee: 株式会社クボタ
Priority date: 2021-12-21
Filing date: 2022-12-13
Publication date: 2023-06-29
Also published as: JP2023092314A

Abstract

In this work machine, a rolling operation unit 23 that is supported to be displaceable in a machine body left-right direction, a rolling actuator 24 that operates to displace the rolling operation unit 23, a left coordination mechanism 30 that coordinates the rolling operation unit 23 with a left lateral portion 19a of a ground working device via a left spring 32, and a right coordination mechanism 40 that coordinates the rolling operation unit 23 with a right lateral portion 19b of the ground working device via a right spring 42 are provided in a rolling operation mechanism 20. The left spring 32 and the right spring 42 have an elastic restoring force in a neutral state of the rolling operation unit 23.

Description

work machine

The present invention relates to a working machine provided with a traveling machine body, a ground working device connected to the traveling machine body so as to be able to roll around the longitudinal axis of the machine body, and a rolling operation mechanism for rolling the ground working device.

The above-described work machine includes a rolling operation mechanism, a rolling operation unit supported by a portion on the side of the traveling machine body so as to be displaceable in the lateral direction of the machine body, a rolling actuator for displacing the rolling operation unit, and a rolling operation unit that is used as a ground work device. There is a left interlocking mechanism that interlocks with the left lateral part via the left ammunition, and a right interlocking mechanism that interlocks the rolling operation part with the right lateral part of the ground working device via the right ammunition. .

As this type of work machine, for example, there is a riding-type rice transplanter shown in Patent Document 1. This riding-type rice transplanter is provided with a ground working device (seedling planting device) which is connected to a traveling machine body so as to be able to roll. A rolling operation part (drive arm) supported by a part (rear link member) on the side of the traveling machine body so that it can be displaced in the left-right direction of the machine body, a rolling actuator (rolling motor) that displaces the rolling operation part, and a ground work device that operates the rolling operation part. The left interlocking mechanism that interlocks with the left side part (left part of the horizontal frame) of the via the left bullet (flexible spring), the rolling operation part is connected to the right side part of the ground work device (right part of the horizontal frame) It is equipped with a right interlocking mechanism that interlocks via a right bullet (flexible spring).

Japanese Patent Application Laid-Open No. 2015-177753

Conventionally, when the rolling operation unit is in a neutral state, if an operation force acts on the ground work device in a direction to swing it, even if it is a weak operation force such as an operation force caused by vibration transmitted from the traveling body to the ground work device. , the ground working device wobbles, and the work finish of the ground working device deteriorates, such as the seedling planting depth being different between the left and right sides of the seedling planting device.

The present invention provides a work machine that can prevent the ground work device from wobbling when the rolling operation part is in the neutral state.

A work machine according to the present invention includes:
A traveling machine body, a ground working device connected to the traveling machine body so as to be able to roll around a longitudinal axis of the machine body, and a rolling operation mechanism for performing a rolling operation of the ground working device, wherein the rolling operation mechanism includes a traveling machine. A rolling operation unit supported to be displaceable in the lateral direction of the fuselage on the side of the fuselage, a rolling actuator for displacing the rolling operation unit, and the rolling operation unit placed on the left lateral side of the ground work device via a left ammunition. and a right interlocking mechanism for interlocking the rolling operation unit with the right side portion of the ground working device via the right ammunition. It has an elastic restoring force in the neutral state of the rolling operation portion.

According to this configuration, since the left or right ammunition machine resists the operating force that swings the ground working device in a state of having elastic restoring force, the operating force acts on the ground working device in the direction that swings it. However, if the operating force is weak enough to be resisted by the left ammunition and the right ammunition, the ground working device will not be shaken. That is, when the rolling operation force of the rolling operation unit is transmitted to the ground working device, the rolling operation unit is in a neutral state while the elastic deformation of the left ammunition and the right ammunition allows some interlocking flexibility to occur. It is possible to make the ground work device less likely to sway.

In the present invention,
It is preferable that a left resilience adjuster capable of adjusting the elastic resilience of the left ammunition and a right resilience adjuster capable of adjusting the elastic resilience of the right ammunition are preferably provided.

According to this configuration, since the elastic restoring force of the left ammunition and the right ammunition can be adjusted, for example, even if the load on the left side and the load on the right side of the ground working device are different, the elastic restoring force of the left ammunition can be adjusted to the load on the left side. The elastic restoring force of the right ammunition can be adjusted to the strength adapted to the load on the right side to prevent the ground working device from swaying.

In the present invention,
In the left interlocking mechanism, a left interlocking rod having one end connected to the rolling operation part, and a left connecting member connected to the left side portion while slidably supporting the other end of the left interlocking rod. is provided, and the left ammunition machine is fitted on the left interlocking rod while being sandwiched between a spring bearing portion provided at one end of the left interlocking rod and a spring bearing portion provided at the left connecting member. The left restoring force adjuster is a coil spring, and the left restoring force adjuster changes the distance between the spring receiver of the left interlocking rod and the spring receiver of the left connecting member to compressively elastically deform the left coil spring. In the right interlocking mechanism, a right interlocking rod, one end of which is connected to the rolling operation part, and the right interlocking rod slidably supporting the other end of the right interlocking rod, the right lateral A right connecting member connected to the side portion is provided, and the right ammunition is sandwiched between a spring receiving portion provided at one end of the right interlocking rod and a spring receiving portion provided on the right connecting member. A right coil spring externally fitted to the right interlocking rod, wherein the right restoring force adjusting portion changes a distance between the spring bearing portion of the right interlocking rod and the spring bearing portion of the right connecting member. is preferably configured to change the amount of compressive elastic deformation of the right coil spring.

According to this configuration, when the rolling operation part is operated by the rolling actuator, the left interlocking rod is pushed toward the left coil spring by the rolling operation part, pushing the left coil spring, and the left coil spring exerts an elastic restoring force. , the left connecting member is pushed, and the rolling operation force of the rolling operation portion is transmitted to the left side portion. When the rolling operation part is operated by the rolling actuator, the right interlocking rod is pushed toward the right coil spring by the rolling operation part, pushing the right coil spring, and the right coil spring has an elastic restoring force. Since the rolling operation force of the rolling operation portion is transmitted to the right side portion by pushing the connecting member, the rolling operation force of the rolling operation portion can be firmly transmitted to the left side portion and the right side portion.

Since the left ammunition is a left coil spring, the structure of the left restoring force adjustment part can be done with a simple structure only by changing the distance between the spring bearing part of the left interlocking rod and the spring bearing part of the left connecting member. can be done. Since the right ammunition is a right coil spring, the structure of the right restoring force adjusting part can be made simple by changing the distance between the spring bearing part of the right interlocking rod and the spring bearing part of the right connecting member. can be done.

In the present invention,
a right interlock flexible part that allows relative movement between the rolling operation part and the right interlock mechanism when the left interlock mechanism transmits the rolling operation force of the rolling operation part to the left lateral part; It is preferable that a left interlock flexible part is provided that allows relative movement between the rolling operation part and the left interlock mechanism when the interlock mechanism transmits the rolling operation force of the rolling operation part to the right lateral part. be.

According to this configuration, when the rolling operation force of the rolling operation portion is transmitted to the left side portion and the ground working device is rolled, the rolling operation portion and the right interlocking mechanism are moved relative to each other by the right interlocking flexible portion. When the load on the right lateral side of the ground work device is not applied to the rolling operation portion and the rolling operation force of the rolling operation portion is transmitted to the right lateral portion to perform the rolling operation of the ground work device, the rolling operation portion and the left interlock. mechanism is relatively moved by the left interlocking flexible part, and the load on the left lateral side of the ground work device is not applied to the rolling operation part. When the load on the right lateral side of the device is applied to the rolling operation part and the rolling operation force of the rolling operation part is transmitted to the right lateral part, compared to the load on the left lateral side of the ground work device applied to the rolling operation part , a rolling actuator with a small output can be employed.

In the present invention,
The left interlocking mechanism includes a left interlocking rod having one end connected to the rolling operation part, and the left interlocking flexible part is provided at one of the one end of the left interlocking rod and the rolling operation part. a right interlocking mechanism having a left elongated hole in which the other of the one end of the left interlocking rod and the rolling operation part is slidably engaged, and the right interlocking mechanism having one end connected to the rolling operation part; A rod is provided, and the right interlock flexible part is provided at one of the one end of the right interlock rod and the rolling operation part, and the other of the one end of the right interlock rod and the rolling operation part slides. It is preferred to have a right slot in movable engagement.

According to this configuration, a simple left long hole is provided in one of the one end of the left interlocking rod and the rolling operation part, with which the other of the one end of the left interlocking rod and the rolling operation part is slidably engaged. Depending on the structure, a left interlock flexible part can be obtained. Right interlock flexibility is provided by a simple structure in which one end of the right interlocking rod and the rolling operation part is provided with a right elongated hole in which the other of the right interlocking rod and the rolling operation part is slidably engaged. part can be obtained.

In the present invention,
It is preferable that a plurality of magnetism generators provided at a plurality of locations of the rolling operation unit and a magnetic sensor that detects the operation position of the rolling operation unit by detecting each of the plurality of magnetism generation units are provided. is.

According to this configuration, the plurality of operation positions of the rolling operation portion are detected by the magnetic sensors, which are fewer than the plurality of magnetism generating portions. can be detected.

In the present invention,
An upper link and a lower link extending from the traveling machine body so as to be able to swing vertically, and a rear link connected to the free end of the upper link and the free end of the lower link and supporting the ground working device in a rolling manner. and a link mechanism for connecting the ground working device to the traveling machine body so as to be able to move up and down, and an operation case accommodating the magnetic sensor is supported by the rear link.

According to this configuration, the rear link is used as a support member for the operation case, so the support structure for the operation case can be simplified.

In the present invention,
The direction in which the rolling operation part is supported on the first outer peripheral portion of the outer peripheral portion of the operation case, and the electric wire extending from the magnetic sensor faces the first outer peripheral portion of the outer peripheral portion of the operation case. 9. The working machine according to claim 8, wherein the wires are arranged along the second outer peripheral portions facing in different directions.

According to this configuration, compared to wiring the electric wire to the first outer peripheral portion, it is not necessary to take care that the electric wire does not come into contact with the rolling operation portion, which is a movable member, so it is easier to wire the electric wire.

In the present invention,
It is preferable that the operation case is supported by the rear link so as to be positioned along the upper link above the upper link when the ground working device is positioned at the lowest operating position.

According to this configuration, the height of the space that needs to be provided above the upper link in order to locate the operating case on the upper link can be adjusted so that the operating case is positioned above the upper link in a non-parallel orientation with respect to the upper link. Therefore, even if the device portion of the ground working device is positioned above the upper link, the operation case can be easily installed in the space between the upper link and the device portion.

It is a side view of a riding-type rice transplanter. It is a rear view of a seedling planting apparatus. FIG. 4 is a plan view of a rolling operation mechanism; 4 is an exploded view of a left interlocking mechanism and a right interlocking mechanism; FIG. It is a side view which shows a sector gear, a rolling motor, and an operation case. FIG. 4 is a cross-sectional view showing a support structure for a sector gear, a left interlocking rod and a right interlocking rod; It is a bottom view showing a magnetic sensor and a sector gear. FIG. 4 is a schematic diagram of the rolling operation mechanism in a neutral state; FIG. 10 is an explanatory diagram of a rolling operation;

An embodiment, which is an example of the present invention, will be described below with reference to the drawings.
In the following description, regarding the running body of a riding-type rice transplanter (an example of a "working machine"), the direction of arrow F shown in FIGS. , the direction of arrow U is "above the fuselage", the direction of arrow D is "below the fuselage", the direction of arrow L shown in FIG. do.

[Overall riding type rice transplanter]
As shown in FIG. 1, the riding-type rice transplanter has a traveling machine body 3 having a pair of left and right front wheels 1 that are swingable and drivable, and a pair of left and right rear wheels 2 that are drivable. have. A driving unit 4 provided with an engine (not shown) is formed in the front part of the traveling body 3 . A driving section 5 is formed at the rear portion of the traveling body 3 . The driving section 5 is provided with a driver's seat 6 and a steering wheel 7 for steering the front wheels 1 . A seedling planting device 10 is connected to the rear part of the traveling body 3 . The seedling planting device 10 is connected to the running body 3 by connecting the front part of the device frame 11 of the seedling planting device 10 to the free end of the link mechanism 8 provided at the rear of the running body 3. ing. The link mechanism 8 is supported by the body frame 9 so as to be vertically swingable. The link mechanism 8 is provided with an elevating cylinder 8 b connected to the body frame 9 and the rear link 8 a of the link mechanism 8 . The seedling planting device 10 is vertically operated over a lowering working state and a raising non-working state by the link mechanism 8 being raised and lowered by the extension and contraction operation of the raising and lowering cylinder 8b.

[Seedling planting device]
As shown in FIGS. 1 and 2, the seedling planting apparatus 10 includes a main frame 11a extending along the left-right direction of the apparatus, and a plurality of planting members extending rearward from a plurality of positions on the main frame 11a in the left-right direction of the apparatus. A device frame 11 having an attached drive case 11b is provided. A seedling planting mechanism 12 is drivably supported on both lateral sides of the rear part of each planting drive case 11b. In this embodiment, four planting drive cases 11b and eight seedling planting mechanisms 12 are provided. , nine or more seedling planting mechanisms 12 may be provided. A seedling mounting table 13 is supported on the front part of the device frame 11 in a rearwardly downward inclined posture. The seedling mounting table 13 is supported so as to be reciprocally slidable in the horizontal direction of the apparatus in a state of being provided with eight seedling mounting portions 13a on which seedlings to be supplied to the eight seedling planting mechanisms 12 are mounted. A sliding guide rail 14 for slidably guiding the lower part of the seedling mounting table 13 is supported by the device frame 11 . Seedling outlets 15 are provided at portions corresponding to the eight seedling planting mechanisms 12 of the sliding guide rail 14 . A plurality of ground floats 16 arranged in the horizontal direction of the device are supported under the device frame 11 .

In the seedling planting device 10, the power from the engine is input to the feed case 17 (see FIG. 2) provided in the front part of the device frame 11 through the rotating shaft 18 (see FIG. 1), and the input power is fed. Two seedling planting mechanisms 12 of each of the four planting drive cases 11b are driven by power transmitted from the case 17 to each planting drive case 11b and transmitted to the planting drive case 11b. When each of the eight seedling planting mechanisms 12 is driven, the pair of seedling planting claws 12a (see FIG. 1) alternately take out the seedlings from the seedling placing portion 13a at the seedling take-out port 15, and the taken out seedlings. is conveyed downward to the field, and a seedling planting movement is performed to plant seedlings in a portion of the field leveled by the ground float 16. - 特許庁The seedling mounting table 13 is interlocked with the seedling planting movement of the seedling planting mechanism 12 by a seedling lateral feeding mechanism (not shown) provided over the seedling mounting table 13 and the feed case 17, and the slide guide rail 14 is moved. The seedlings placed on the seedling placement portion 13a are reciprocated in the lateral direction of the device with respect to the seedling outlet 15. As shown in FIG. Seedlings are taken out by the seedling planting claws 12a of the seedling planting mechanisms 12 sequentially from one end side to the other end side in the width direction of the seedlings placed on the seedling placement portion 13a.

[Rolling control of seedling planting device]
The seedling planting device 10 is connected to the traveling body 3 in a rollable state around the longitudinal axis X (see FIG. 2) of the body. Specifically, as shown in FIG. 1, the link mechanism 8 provided at the rear of the traveling body 3 includes an upper link 8c and a lower link 8d extending from the body frame 9 toward the rear of the body so as to be capable of swinging up and down. It has a rear link 8a connected to the free end of link 8c and the free end of lower link 8d. A feed case 17 is provided at the center of the front portion of the device frame 11 in the horizontal direction of the device. The feed case 17 is supported by the rear link 8a so as to be rotatable about the longitudinal axis X of the machine body, and the device frame 11 is supported by the rear link 8a so as to be rollable about the longitudinal axis X of the machine body.

As shown in FIGS. 1 and 2, a rolling operation mechanism 20 for rolling the seedling planting device 10 with respect to the traveling body 3 is provided on the front side of the seedling mounting table 13 . As shown in FIG. 3 , the rolling operation mechanism 20 is linked to a control device 21 , and the control device 21 is linked to a tilt angle sensor 22 that detects the horizontal tilt angle of the seedling planting device 10 . The control device 21 controls the rolling operation mechanism 20 based on the detection result of the tilt angle sensor 22 so that the lateral posture of the seedling planting device 10 becomes horizontal or nearly horizontal. It is configured to cause a rolling operation of the device 10 . Even if the traveling machine body 3 tilts left and right due to unevenness of the field plow, etc., the seedling planting device 10 can be made to carry out the seedling work in which the right and left seedling planting depths are the same or almost the same. Left and right balance springs 56 shown in FIG. Regardless, the weight balance is achieved so that the left side weight and the right side weight of the seedling planting device 10 are balanced.

[Rolling operation mechanism]
As shown in FIG. 3 , the rolling operation mechanism 20 includes a fan-shaped gear 23 as a rolling operating portion, a rolling motor 24 as a rolling actuator for swinging the fan-shaped gear 23 , and the fan-shaped gear 23 on the left side of the seedling planting device 10 . A left interlocking mechanism 30 interlocking with the lateral portion 19a and a right interlocking mechanism 40 interlocking the sector gear 23 with the right lateral portion 19b of the seedling planting device 10 are provided. As shown in FIGS. 6 and 7, an operating position detection mechanism 50 for detecting the operating position of the sector gear 23 is provided across the sector gear 23 and the operation case 25 as a support section for supporting the sector gear 23. .

As shown in FIGS. 2, 3, and 4, the left lateral portion 19a of the seedling planting device 10 extends in the lateral direction of the device out of the lateral frame 19 provided on the device frame 11 in a state of extending along the lateral direction of the device. It is composed of a portion located on the left end side of the center of the The right lateral portion 19b of the seedling planting device 10 is formed by a portion of the lateral frame 19 located on the right end side of the center in the lateral direction of the machine body. The horizontal frame 19 constitutes a support frame 11c that supports the seedling mounting table 13 so as to be movable in the horizontal direction of the apparatus. The support frame 11c is composed of left and right support frames 11d erected on the left and right ends of the main frame 11a, and horizontal frames 19 provided over the left and right support frames 11d.

　As shown in Figures 3 and 5, the sector gear 23 is supported by the rear link 8a as a portion on the traveling body side. As shown in FIGS. 3, 5 and 6, the sector gear 23 is supported on the rear link 8a by providing an operation case 25 as a support section on the upper part of the rear link 8a. It is done by The fan-shaped gear 23 is supported on the operation case 25 by supporting the support shaft 23a of the fan-shaped gear 23 on a boss portion 25b provided on the first outer peripheral portion 25a of the operation case 25. As shown in FIG. The sector gear 23 is supported by the operation case 25, which is a support portion of the rear link 8a, so as to be swingably displaceable in the left-right direction of the machine body about the axis P of the support shaft 23a.

The rolling motor 24 is composed of an electric motor. The rolling motor 24, as shown in FIGS. The sector gear 23 and rolling motor 24 are supported outside the operation case 25 . In this embodiment, the fan-shaped gear 23 and the rolling motor 24 are supported on the first outer peripheral portion 25a of the operation case 25, but the fan-shaped gear 23 and the rolling motor 24 are distributed to different outer peripheral portions of the operation case 25 and supported. It's okay. As shown in FIGS. 5 and 6, the operation case 25 is fitted from below to the upper case portion 25u supported by the rear link 8a, closing the downward opening of the upper case portion 25u, and A lower case portion 25 d forming a space for accommodating the magnetic sensor 51 is provided inside the operation case 25 .

The rolling motor 24 has an output gear 24a that meshes with the sector gear 23, as shown in FIGS. The rolling motor 24 is controlled by the control device 21 so that the output gear 24a swings and displaces the sector gear 23 in the lateral direction of the machine body.

In this embodiment, the rolling operation unit is configured by the sector gear 23, and the rolling actuator is configured by the rolling motor 24, which is an electric motor. However, the present invention is not limited to this. As the rolling operation part, a rack or pinion may be used, which may be slidable in the left-right direction of the machine body. As the rolling actuator, it is possible to employ a cylinder or the like that operates the rolling operation portion by extending and retracting. In this embodiment, the support for supporting the sector gear 23 and the rolling motor 24 is constituted by the operation case 25, but the support may be of any shape, such as a single plate-like member or a groove-shaped member. may be employed.

As shown in FIGS. 1 and 5, when the seedling planting device 10 is at the lowest operating position, the operation case 25 is positioned above the upper link 8c along the upper link 8c. Supported. When the seedling planting device 10 is positioned at the lowest operating position, the distance between the portion 13b of the seedling platform 13 located above the upper link 8c and the upper link 8c is the narrowest. , the rolling motor 24 can be easily provided in the space between the upper link 8c and the seedling loading table 13.

[Left interlocking mechanism]
As shown in FIG. 3, the left interlocking mechanism 30 includes a left interlocking rod 31 that interlocks the sector gear 23 with the left lateral portion 19a, a left coil spring 32 as a left bullet, and a left connecting member 33. The rolling operation force of the sector gear 23 is transmitted through the left interlocking rod 31, the left coil spring 32 and the left connecting member 33 to the left side portion 19a.

Specifically, one end 31a of the left interlocking rod 31 is connected to the sector gear 23, as shown in FIGS. One end 31 a of the left interlocking rod 31 is connected to the fan-shaped gear 23 on the side of the operation case 25 where the fan-shaped gear 23 is located. One end 31 a of the left interlocking rod 31 is connected to the sector gear 23 by supporting the one end 31 a on a connecting shaft 26 provided on the sector gear 23 . The left connecting member 33 is connected to the left side portion 19a while slidably supporting the other end portion 31b of the left interlocking rod 31 through the support hole 33a. The left coil spring 32 is fitted on the left interlocking rod 31 while being sandwiched between a spring bearing portion 31c provided on one end portion 31a of the left interlocking rod 31 and a spring bearing portion 33b provided on the left connecting member 33. . The left coil spring 32 is elastically deformed in advance so as to have an elastic restoring force in the neutral state of the sector gear 23, i.e., in a state of initial elastic deformation. and the spring receiving portion 33b.

As shown in FIGS. 3 and 4, the left interlocking rod 31 has a plate-like portion 31T forming one end portion 31a and a spring receiving portion 31c, extends from the plate-like portion 31T toward the left connecting member 33, and is provided with a rod portion 31L forming a . The spring receiving portion 31c of the left interlocking rod 31 is formed by a bent end provided at the end of the plate-like portion 31T on the rod portion side. A spring receiving portion 33b of the left connecting member 33 is configured by a plate-like portion having a support hole 33a. The spring receiving portion 31c of the left interlocking rod 31 and the spring receiving portion 33b of the left connecting member 33 are connected via the spring receiving member 34 positioned between the

spring receiving portions

31c, 33b and the end of the left coil spring 32. It is configured to receive the left coil spring 32 . The spring bearing member 34 is provided with a through hole through which the rod portion 31L is inserted.

[Right interlocking mechanism]
As shown in FIG. 3, the right interlocking mechanism 40 includes a right interlocking rod 41 that interlocks the sector gear 23 with the right lateral portion 19b, a right coil spring 42 as a right spring, and a right connecting member 43. The rolling operation force of the sector gear 23 is transmitted to the right side portion 19b via the right interlocking rod 41, the right coil spring 42 and the right connecting member 43. As shown in FIG.

Specifically, one end 41a of the right interlocking rod 41 is connected to the sector gear 23, as shown in FIGS. One end 41 a of the right interlocking rod 41 is connected to the sector gear 23 on the side of the operation case 25 where the sector gear 23 is located. One end 41 a of the right interlocking rod 41 is connected to the sector gear 23 by supporting the one end 41 a on a connecting shaft 26 provided on the sector gear 23 . The right connecting member 43 is connected to the right side portion 19b while slidably supporting the other end 41b of the right interlocking rod 41 through the support hole 43a. The right coil spring 42 is fitted on the right interlocking rod 41 while being sandwiched between a spring bearing portion 41c provided on one end portion 41a of the right interlocking rod 41 and a spring bearing portion 43b provided on the right connecting member 43. . The right coil spring 42 is elastically deformed in advance so as to have an elastic restoring force in the neutral state of the sector gear 23, i.e., in a state of initial elastic deformation. and the spring receiving portion 43b.

As shown in FIGS. 3 and 4, the right interlocking rod 41 has a plate-like portion 41T forming one end portion 41a and a spring receiving portion 41c, extends from the plate-like portion 41T toward the right connecting member 43, and extends from the plate-like portion 41T to the other end portion 41b. is provided with a rod portion 41L forming a . The spring receiving portion 41c of the right interlocking rod 41 is formed by a bent end provided at the end of the plate-like portion 41T on the rod portion side. The spring receiving portion 43b of the right connecting member 43 is composed of a plate-like portion having a support hole 43a. The spring receiving portion 41c of the right interlocking rod 41 and the spring receiving portion 43b of the right connecting member 43 are connected via the spring receiving member 44 positioned between the

spring receiving portions

41c, 43b and the end of the right coil spring . It is configured to receive the right coil spring 42 . The spring receiving member 44 is provided with a through hole through which the rod portion 41L is inserted.

As shown in FIG. 8, in this embodiment, the distance L1 from the connecting shaft 26 to the left side portion 19a when the sector gear 23 is in the neutral state, and the distance L1 from the connecting shaft 26 to the right side portion 19a when the sector gear 23 is in the neutral state. Although it is configured so that the distance L2 to the side portion 19b is the same, it is not limited to this. As for the left interlocking mechanism 30 and the right interlocking mechanism 40, the distance L1 in the left interlocking mechanism 30 and the distance L2 in the right interlocking mechanism 40 may be different.

In this embodiment, the left coil spring 32 is used as the left bullet and the right coil spring 42 is used as the right bullet, but this is not the only option. Various elastic members such as disc springs, spiral springs, and rubber materials can be used for the left and right bullets.

[Supporting left interlocking rod and right interlocking rod in sector gear]
As shown in FIGS. 3 and 6, one end 31a of the left interlocking rod 31 is supported on the sector gear 23 by providing a left connecting hole 36 (see FIG. 4) in one end 31a of the left interlocking

rod

31 and 31a is fitted onto the connecting shaft 26 of the sector gear 23 through the left connecting hole 36. As shown in FIG. One end 41a of the right interlocking rod 41 is supported on the sector gear 23 by providing a right connecting hole 46 (see FIG. 4) in one end 41a of the right interlocking rod 41 and connecting the one end 41a to the sector gear 23 through the right connecting hole 46. is fitted on the connecting shaft 26 of the . One end portion 31 a of the left interlocking rod 31 and one end portion 41 a of the right interlocking rod 41 are fitted on the connecting shaft 26 so as to be aligned in the direction along the axis of the connecting shaft 26 .

As shown in FIG. 6, one end 31a of the left interlocking rod 31 extends over the first shaft portion 26a of the connecting shaft 26, to which one end 31a of the left interlocking rod 31 is fitted, and the left interlocking rod 31. A left connecting flexible portion 27 is provided to allow displacement in the direction along the axis of the connecting shaft 26 with respect to the one-shaft portion 26a. Specifically, as shown in FIGS. 4 and 6, the left connecting flexible portion 27 has a length in the direction along the axis of the connecting shaft 26 of the first shaft portion 26a that is equal to the length of the one end portion 31a of the left interlocking rod 31. , and the left connecting hole 36 is a left elongated hole that is long in the direction along the axis of the left interlocking rod 31 .

As shown in FIG. 6 , one end 41 a of the right interlocking rod 41 extends over the second shaft portion 26 b of the connecting shaft 26 to which the one end 41 a of the right interlocking rod 41 is fitted, and the right interlocking rod 41 . A right connecting flexible portion 28 is provided to allow displacement in the direction along the axis of the connecting shaft 26 with respect to the biaxial portion 26b. Specifically, as shown in FIGS. 4 and 6, the right connecting flexible portion 28 has a length in the direction along the axis of the connecting shaft 26 of the second shaft portion 26b longer than the thickness of the one end portion 41a. The right connecting hole 46 is formed as a right elongated hole that is elongated in the direction along the axis of the right interlocking rod 41 .

As shown in FIG. 6, a collar portion 26c projecting radially outward of the connecting shaft 26 is provided between the first shaft portion 26a and the second shaft portion 26b. Even if the one end 31a of the left interlocking rod 31 and the one end 41a of the right interlocking rod 41 come together, the flange 26c keeps the one end 31a of the left interlocking rod 31 and the one end 41a of the right interlocking rod 41 together. It is configured to be spaced apart in the direction along the axis of the.

As shown in FIG. 6, the first shaft portion 26a, the second shaft portion 26b and the collar portion 26c are configured by a bushing member 29 fitted onto the connecting shaft 26. As shown in FIG. The bush member 29 is made of resin. The bushing member 29 is divided into two divided

bushing members

29a and 29b along the axis of the connecting shaft 26. As shown in FIG. One split bushing member 2a of the two

split bushing members

29a and 29b is provided with a first shaft portion 26a and a split flange portion connected to the first shaft portion 26a of the flange portion 26c. The other split bushing member 29b of the two

split bushing members

29a and 29b is provided with a second shaft portion 26b and a split flange portion connected to the second shaft portion 26b of the flange portion 26c. In this embodiment, the bushing member 29 is divided into two divided

bushing members

29a and 29b, but a non-divided bushing member can be used as the bushing member 29.

In this embodiment, the one end 31a of the left interlocking rod 31 and the one end 41a of the right interlocking rod 41 are supported by the same connecting shaft 26, but the left connecting shaft and the right connecting shaft are connected to the sector gear 23 separately. One end 31a of the left interlocking rod 31 may be supported by the left connecting shaft, and one end 41a of the right interlocking rod 41 may be supported by the right connecting shaft.

[Interlocking accommodation department]
As shown in FIG. 3 , the left interlocking mechanism 30 is provided with a left interlocking flexibility section 35 . When the right interlocking mechanism 40 transmits the rolling operation force of the sector gear 23 to the right side portion 19b, the left interlocking flexible portion 35 allows relative movement between the sector gear 23 and the left interlocking mechanism 30, and the sector gear 23 rolls. It is configured so that the operating force is not transmitted to the left side portion 19a. The right interlocking mechanism 40 is provided with a right interlocking flexible part 45 . When the left interlocking mechanism 30 transmits the rolling operation force of the sector gear 23 to the left side portion 19a, the right interlocking flexible portion 45 allows relative movement between the sector gear 23 and the right interlocking mechanism 40, and the sector gear 23 rolls. It is configured so that the operating force is not transmitted to the right side portion 19b.

Specifically, as shown in FIGS. 3 and 4 , the left interlock flexible part 35 has a left connecting hole 36 provided in one end 31 a of the left interlock rod 31 . The left connecting hole 36 is formed as a left long hole elongated in the direction along the axis of the left interlocking rod 31 . The sector gear 23 is slidably engaged with the left connecting hole 36 . The sector gear 23 is slidably engaged with the left connecting hole 36 by slidably engaging the connecting shaft 26 with the left connecting hole 36 (left elongated hole).

As shown in FIGS. 3 and 4, the right interlock flexible part 45 has a right connecting hole 46 provided in one end 41 a of the right interlock rod 41 . The right connecting hole 46 is formed as a right elongated hole elongated in the direction along the axis of the right interlocking rod 41 . The sector gear 23 is slidably engaged with the right connecting hole 46 (right elongated hole). The sector gear 23 is slidably engaged with the right connecting hole 46 by slidably engaging the connecting shaft 26 with the right connecting hole 46 (right elongated hole).

When the sector gear 23 is operated in the swinging direction indicated by arrow A (see FIG. 3), the connecting shaft 26 is positioned at the left end of the left connecting hole 36 (left long hole) and the left interlocking rod 31 is connected. The shaft 26 pushes the sector gear 23 in the left direction, and the left interlocking mechanism 30 transmits the rolling force of the sector gear 23 to the left side portion 19a. At this time, the connecting shaft 26 moves through the right connecting hole 46 (right elongated hole) of the right interlocking rod 41 in the left direction of the fuselage, and the rolling operation force of the sector gear 23 is not transmitted to the right interlocking rod 41. The rolling operation force is not transmitted to the right side portion 19b.

When the sector gear 23 is operated in the swinging direction indicated by the arrow B (see FIG. 3), the connecting shaft 26 is positioned at the right end of the right connecting hole 46 (right long hole) and the right interlocking rod 41 is connected. The shaft 26 pushes the fan-shaped gear 23 toward the right, and the right interlocking mechanism 40 transmits the rolling operation force of the fan-shaped gear 23 to the right side portion 19b. At this time, the connecting shaft 26 moves rightward through the left connecting hole 36 (left elongated hole) of the left interlocking rod 31, and the rolling operation force of the sector gear 23 is not transmitted to the left interlocking rod 31. The rolling operation force is not transmitted to the left side portion 19a.

In this embodiment, the left interlock flexible part 35 is provided with the left connecting hole 36 (left long hole) with which the sector gear 23 is slidably engaged with the one end 31a of the left interlock rod 31. The sector gear 23 (rolling operation portion) may be provided with a left elongated hole with which the one end portion 31a of the rod 31 is slidably engaged. In this embodiment, the right interlock flexible part 45 is provided with the right connecting hole 46 (right long hole) with which the sector gear 23 is slidably engaged with one end 41a of the right interlock rod 41. The sector gear 23 (rolling operation portion) may be provided with a right elongated hole with which one end portion 41a of the rod 41 is slidably engaged.

[Operation position detection mechanism]
As shown in FIGS. 5, 6 and 7, an operating position detection mechanism 50 for detecting the operating position of the sector gear 23 is provided across the sector gear 23 and the operation case 25. As shown in FIGS.

As shown in FIGS. 5, 6, and 7, the operating position detection mechanism 50 includes magnetism generators 52 provided at two locations on the sector gear 23 and a magnetic sensor 51 provided on the operation case 25. . The two magnetism generators 52 are composed of magnets attached to the sector gear 23 . The magnetic sensor 51 is accommodated in the operation case 25, as shown in FIGS. A detection port 53 is opened in the first outer peripheral portion 25 a of the operation case 25 to allow the magnetic sensor 51 to detect the magnetic field generator 52 .

As shown in FIGS. 5 and 6, the sector gear 23 is supported by the first outer peripheral portion 25a of the outer peripheral portion of the operation case 25. As shown in FIGS. As shown in FIGS. 5 and 7, the electric wire 54 extending from the magnetic sensor 51 toward the control device 21 faces in a direction different from the direction in which the first outer peripheral portion 25a of the outer peripheral portion of the operation case 25 faces. The wiring extends outside of the operation case 25 from a lead-out port 55 provided in the side portion 25c as the second outer peripheral portion, and is wired along the side portion 25c.

In the operating position detection mechanism 50, the sector gear 23 is oscillated, one of the two magnetic field generators 52 faces the magnetic sensor 51 through the detection port 53, and the magnetic field generator 52 When detected by the magnetic sensor 51, it is detected that the sector gear 23 is positioned at the operating position which is one of the operating limits of the swinging operating range, and the other magnetic generating section 52 of the two magnetic generating sections 52 is detected as the detection opening. When the magnetism generator 52 is detected by the magnetic sensor 51 facing the magnetic sensor 51 via 53, it is detected that the sector gear 23 is positioned at the operation position which is the other operation limit of the swing operation range. An electric signal as a detection result is transmitted from the magnetic sensor 51 to the control device 21 .

In the present embodiment, the magnetic field generators 52 are provided at two positions on the sector gear 23, but the magnetic field generators 52 may be provided at three or more positions to detect three or more operating positions of the sector gear 23.

In the rolling operation mechanism 20, when the fan-shaped gear 23 is in the neutral state, even if an operation force acts on the seedling planting device 10 in a direction to swing it, the left coil spring 32 and the right coil spring 42 are elastic restoring forces. , and the fluctuation of the seedling planting device 10 is suppressed by the left coil spring 32 and the right coil spring 42 .

The rolling motor 24 is controlled by the control device 21, and the sector gear 23 is rotated by the rolling motor 24 in the swinging direction indicated by arrow A (left swinging direction) or the swinging direction indicated by arrow B (right swinging direction). operated by The swing operation of the sector gear 23 in the swing direction (left swing direction) indicated by the arrow A and the swing operation of the sector gear 23 in the swing direction (right swing direction) indicated by the arrow B are , until the tilt angle sensor 22 detects that the seedling planting device 10 has become horizontal or nearly horizontal. When the sector gear 23 is swung in the swing direction (leftward swing direction) indicated by the arrow A, the operation position detection mechanism 50 detects two points in the operating position detection mechanism 50 when the sector gear 23 reaches the operating position of the swing operation limit. It is possible to carry out until it is detected by one of the magnetic field generators 52 and the magnetic sensor 51 . When the sector gear 23 is swung in the swing direction (rightward swing direction) indicated by the arrow B, two points in the operating position detection mechanism 50 indicate that the sector gear 23 has reached the operating position of the swing operation limit. It is possible to carry out until detection is made by the other magnetic field generator 52 of the magnetic field generator 52 and the magnetic sensor 51 .

As shown in FIG. 9, when the sector gear 23 is pivoted in the left pivoting direction, the rolling operation force of the sector gear 23 is transmitted by the left interlocking mechanism 30 to the left side portion 19a. That is, the left interlocking rod 31 is pushed leftward by the connecting shaft 26 , and the rolling operation force of the sector gear 23 is transmitted from the left interlocking rod 31 to the left coil spring 32 , and from the left coil spring 32 to the left connecting member 33 . As a result, the left side portion 19a is pushed by the left connecting member 33, and a rolling operation is performed to roll the seedling planting device 10 counterclockwise around the longitudinal axis X of the machine body as a rolling fulcrum. . The left coil spring 32 is slightly compressed and deformed by the rolling operation force of the sector gear 23, and transmits the rolling operation force to the left connecting member 33, so that the sector gear 23 and the left lateral portion 19a are slightly interlockingly flexible. linked. When the seedling planting apparatus 10 is rolled counterclockwise, the rolling operation force of the sector gear 23 is not transmitted to the right interlocking rod 41 and not to the right lateral portion 19b due to the action of the right interlock flexible portion 45. , the load for pulling up the right lateral side of the seedling planting device 10 is not applied to the sector gear 23. However, when the seedling planting device 10 is rolled counterclockwise, the right lateral portion 19b of the seedling planting device 10 swings upward in accordance with this rolling operation, and the right connecting member 43 is moved by the right lateral portion 19b. Then, the right interlocking rod 41 is pushed toward the sector gear 23 via the right coil spring 42, and the connecting shaft 26 is positioned at the right end portion of the right connecting hole 46 (right elongated hole) of the right interlocking rod 41. Become.

When the sector gear 23 is operated to swing in the right swing direction, the rolling operation force of the sector gear 23 is transmitted by the right interlocking mechanism 40 to the right side portion 19b. That is, the right interlocking rod 41 is pushed to the right of the fuselage by the connecting shaft 26 , and the rolling operation force of the sector gear 23 is transmitted from the right interlocking rod 41 to the right coil spring 42 , and from the right coil spring 42 to the right connecting member 43 . As a result, the right side portion 19b is pushed by the right connecting member 43, and the seedling planting device 10 is rolled rightward (clockwise) around the longitudinal axis X of the machine body as a rolling fulcrum. The right coil spring 42 is slightly compressed and deformed by the rolling operation force of the sector gear 23 and transmits the rolling operation force to the right connecting member 43, so that the sector gear 23 and the right side portion 19b are slightly interlockingly flexible. linked. When the seedling planting apparatus 10 is rolled clockwise, the rolling operation force of the sector gear 23 is not transmitted to the left interlocking rod 31 and not to the left lateral portion 19a due to the action of the left interlocking flexible portion 35. , the load for pulling up the left lateral side of the seedling planting device 10 is not applied to the sector gear 23. However, when the seedling planting device 10 is rolled clockwise, the left lateral portion 19a of the seedling planting device 10 swings upward in association with this rolling operation, and the left connecting member 33 is moved by the left lateral portion 19a. Then, the left interlocking rod 31 is pushed toward the sector gear 23 via the left coil spring 32, and the connecting shaft 26 is positioned at the left end portion of the left connecting hole 36 (left elongated hole) of the left interlocking rod 31. Become.

When the sector gear 23 is operated to swing, the connecting shaft 26 supporting the one end 31a of the left interlocking rod 31 and the one end 41a of the right interlocking rod 41 moves in the front-rear direction. An operation force for tilting the right interlocking rod 41 with respect to the posture of the sector gear 23 in the neutral state acts on the left interlocking rod 31 and the right interlocking rod 41 . However, the left coupling flexible portion 27 allows the one end portion 31a of the left interlocking rod 31 to shift relative to the first shaft portion 26a, and the left coupling flexible portion 27 prevents the left interlocking mechanism 30 from taking an unreasonable posture. prevented. The right coupling flexible portion 28 allows the one end portion 41a of the right interlocking rod 41 to shift relative to the second shaft portion 26b, and prevents the right interlocking mechanism 40 from taking an unreasonable posture. be. One end 31a of the left interlocking rod 31 and one end 41a of the right interlocking rod 41 do not contact each other even if the one end 31a of the left interlocking rod 31 and the one end 41a of the right interlocking rod 41 are displaced. The one end portion 41a of the rod 41 is separated by the flange portion 26c.

[Restoring force adjustment part]
As shown in FIG. 4, the left interlocking mechanism 30 is provided with a left restoring force adjuster 37 so that the elastic restoring force of the left coil spring 32 in the neutral state of the sector gear 23 can be adjusted by the left restoring force adjuster 37. is configured to

Specifically, as shown in FIG. 4, the left restoring force adjusting portion 37 is configured such that the left connecting member 33 is detachably connected to the left lateral portion 19a by a connecting bolt 38, and the left lateral side A plurality of mounting holes 39 for replacing the connection bolts 38 are provided in the portion 19a so as to be aligned along the left-right direction of the machine body.

In the left restoring force adjusting portion 37, the connecting bolt 38 is replaced with a mounting hole 39 selected from a plurality of mounting holes 39, and the connecting position of the left connecting member 33 in the left lateral portion 19a is changed. 31 and the spring receiving portion 33b of the left connecting member 33 is changed to change the compression elastic deformation amount of the left coil spring 32, and the restoring force of the left coil spring 32 is adjusted. When the elastic restoring force of the left coil spring 32 is adjusted, the rod portion 31L of the left interlocking rod 31 engages with the spring receiving portion 33b of the left connecting member 33 on the side opposite to the side where the left coil spring 32 is located. The screw hole member 31e that is in contact is rotated to adjust the length by which the rod portion 31L protrudes from the spring bearing portion 33b to the side opposite to the left coil spring side. That is, regardless of the change in the distance between the spring receiving portion 31c and the spring receiving portion 33b, in the neutral state of the sector gear 23, the left coil spring side (left side) of the left coupling hole 36 (left elongated hole) of the left interlocking rod 31 is Adjust so that the connecting shaft 26 is positioned at the end.

As shown in FIG. 4 , the right interlocking mechanism 40 is provided with a right restoring force adjuster 47 so that the elastic restoring force of the right coil spring 42 in the neutral state of the sector gear 23 can be adjusted by the right restoring force adjuster 47 . is configured to

Specifically, as shown in FIG. 4 , in the right restoring force adjusting portion 47, the right connecting member 43 is detachably connected to the right lateral portion 19b by a connecting bolt 48, similar to the left restoring force adjusting portion 37. , and a plurality of mounting holes 49 for replacing the connection bolts 48 are provided in the right side portion 19b along the left-right direction of the machine body.

In the right restoring force adjusting portion 47, the connecting bolt 48 is replaced with a mounting hole 49 selected from a plurality of mounting holes 49 to change the connecting position of the right connecting member 43 in the right side portion 19b, thereby changing the right interlocking rod. 41 and the spring receiving portion 43b of the right connecting member 43 is changed to change the compressive elastic deformation amount of the right coil spring 42, and the restoring force of the right coil spring 42 is adjusted. When the elastic restoring force of the right coil spring 42 is adjusted, the rod portion 41L of the right interlocking rod 41 engages with the spring receiving portion 43b of the right connecting member 43 on the side opposite to the side where the right coil spring 42 is located. The screw hole member 41e that is in contact is rotated to adjust the length by which the rod portion 41L protrudes from the spring receiving portion 43b to the side opposite to the right coil spring side. That is, regardless of the change in the distance between the spring receiving portion 41c and the spring receiving portion 43b, in the neutral state of the sector gear 23, the right coil spring side (right side) of the right coupling hole 46 (right elongated hole) of the right interlocking rod 41 is Adjust so that the connecting shaft 26 is positioned at the end.

In the present embodiment, the left restoring force adjusting portion 37 is configured to adjust the position of the left connecting member 33 in the left lateral portion 19a. Alternatively, a configuration in which the position of the spring receiving portion 31c is adjusted in the left interlocking rod 31 can be adopted. In the present embodiment, the right restoring force adjusting portion 47 is configured to adjust the position of the right connecting member 43 in the right lateral portion 19b. Alternatively, it is possible to employ a configuration in which the right interlocking rod 41 adjusts the position of the spring receiving portion 41c.

[Another embodiment]
In the above-described embodiment, an example in which a seedling planting device is employed as a ground working device has been shown. It is also possible to adopt a device that performs various ground work such as fertilizing work by spraying on the ground.

The present invention can be applied to a working machine provided with a ground working device connected to a traveling machine body so as to be able to roll around the longitudinal axis of the machine body, and a rolling operation mechanism for rolling the ground working device.

3 Running body 8a Rear link (portion on the running body side)
8c upper link 8d lower link 10 seedling planting device (ground working device)
19a left side portion 19b right side portion 20 rolling operation mechanism 23 sector gear (rolling operation portion)
24 rolling motor (rolling actuator)
26 connecting shaft 25 operation case (supporting part)
25a First outer peripheral portion 25c Side portion (second outer peripheral portion)
30 Left interlocking mechanism 31 Left interlocking rod 31c Spring receiver 32 Left coil spring (left bullet)
33 Left connecting member 33b Spring receiving portion 35 Left interlock flexible portion 36 Left connecting hole (left long hole)
37 left restoring force adjusting portion 40 right interlocking mechanism 41 right interlocking rod 41c spring receiving portion 42 right coil spring (right ammunition)
43 Right connecting member 43b Spring receiving portion 45 Right interlock flexible portion 46 Right connecting hole (right long hole)
47 right restoring force adjustment unit 51 magnetic sensor 52 magnetism generation unit 54 electric wire

Claims

a running body,
a ground working device connected to the traveling machine body so as to be able to roll around the longitudinal axis of the machine body;
a rolling operation mechanism for rolling the ground working device,
The rolling operation mechanism includes: a rolling operation unit supported by a portion on the traveling machine body side so as to be displaceable in the lateral direction of the machine; a rolling actuator for displacing the rolling operation unit; a left interlocking mechanism that interlocks the parts via a left ammunition, and a right interlocking mechanism that interlocks the rolling operation unit with the right lateral part of the ground working device via a right ammunition,
The left bullet machine and the right bullet machine have an elastic restoring force in the neutral state of the rolling operation unit.
a left restoring force adjusting unit capable of adjusting the elastic restoring force of the left ammunition;
2. The working machine according to claim 1, further comprising a right restoring force adjusting section capable of adjusting an elastic restoring force of the right ammunition.
In the left interlocking mechanism, a left interlocking rod having one end connected to the rolling operation part, and a left connecting member connected to the left side portion while slidably supporting the other end of the left interlocking rod. is provided,
The left ammunition is a left coil spring that is fitted onto the left interlocking rod while being sandwiched between a spring receptacle provided at one end of the left interlocking rod and a spring receptacle provided on the left connecting member. ,
The left restoring force adjusting portion changes the amount of compressive elastic deformation of the left coil spring by changing the distance between the spring receiving portion of the left interlocking rod and the spring receiving portion of the left connecting member. configured to
In the right interlocking mechanism, a right interlocking rod having one end connected to the rolling operation part, and a right connecting member connected to the right side portion while slidably supporting the other end of the right interlocking rod is provided,
The right ammunition is a right coil spring that is fitted onto the right interlocking rod while being sandwiched between a spring bearing portion provided on one end of the right interlocking rod and a spring bearing portion provided on the right connecting member. ,
The right restoring force adjusting portion changes the amount of compressive elastic deformation of the right coil spring by changing the distance between the spring receiving portion of the right interlocking rod and the spring receiving portion of the right connecting member. 3. The work machine according to claim 2, wherein
a right interlock flexible part that allows relative movement between the rolling operation part and the right interlock mechanism when the left interlock mechanism transmits the rolling operation force of the rolling operation part to the left lateral part;
A left interlock flexible part is provided for allowing relative movement between the rolling operation part and the left interlock mechanism when the right interlock mechanism transmits the rolling operation force of the rolling operation part to the right side portion. Item 4. The work machine according to any one of Items 1 to 3.
The left interlocking mechanism includes a left interlocking rod, one end of which is connected to the rolling operation unit,
The left interlock flexible part is provided at one of the one end of the left interlock rod and the rolling operation part, and the other of the one end of the left interlock rod and the rolling operation part is slidably engaged. Equipped with a left long hole that
The right interlocking mechanism includes a right interlocking rod one end of which is connected to the rolling operation unit,
The right interlock flexible part is provided at one of the one end of the right interlock rod and the rolling operation part, and the other of the one end of the right interlock rod and the rolling operation part is slidably engaged. 5. The working machine according to claim 4, further comprising a right elongated hole for
3. A plurality of magnetism generators provided at a plurality of locations of said rolling operation unit, and a magnetic sensor for detecting an operation position of said rolling operation unit by detecting each of said plurality of magnetism generation units. 6. The working machine according to any one of 1 to 5.
An upper link and a lower link extending from the traveling machine body so as to be able to swing vertically, and a rear link connected to the free end of the upper link and the free end of the lower link and supporting the ground working device in a rolling manner. a link mechanism for connecting the ground working device to the traveling machine body so as to be able to ascend and descend;
7. The working machine according to claim 6, wherein an operation case containing said magnetic sensor is supported by said rear link.
The rolling operation portion is supported by a first outer peripheral portion of the outer peripheral portion of the operation case,
8. The electric wire extending from the magnetic sensor according to claim 7, wherein the electric wire extending from the magnetic sensor is wired along a second outer peripheral portion of the outer peripheral portion of the operation case that faces in a direction different from the direction in which the first outer peripheral portion faces. working machine.
9. The operation case according to claim 7, wherein the operation case is supported by the rear link in a state of being located above the upper link along the upper link when the ground working device is positioned at the lowest operating position. working machine.