JP2020110098A - Weeding device and weeding rotor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily mount a sub-weeding rotor. A weeding rotor having a rotating shaft rotatably supported by a machine frame, a main weeding rotor that rotates together with the rotating shaft, and a sub-weeding rotor arranged side by side with a main weeding rotor in the axial direction of the rotating shaft. And an engaging hole provided on one of the main weeding rotor and the sub weeding rotor and having an insertion hole and an engaging groove extending from the insertion hole in the circumferential direction of the weeding rotor, and the main weeding rotor and the sub weeding rotor. The other side is provided with an engaging pin having a shaft portion and an engaging pin provided at the end of the shaft portion and having a head that can be inserted into and removed from the insertion hole, and the shaft portion has a head portion in the insertion hole. It is located in the insertion hole in the passed state, and in this state, the sub weeding rotor is rotated with respect to the main weeding rotor to be inserted into the engaging groove and abutted against the end of the engaging groove, and the engaging hole is formed. The wall portion forming the above has a regulating portion for restricting the sub-weeding rotor from separating from the main weeding rotor by engaging the head portion in a state where the shaft portion is in contact with the end portion of the engaging groove. [Selection diagram] FIG. 18

Description

The present invention relates to a weeding device and a weeding rotor.

Conventionally, the weeding device disclosed in Patent Document 1 is known.
The weeding device disclosed in Patent Document 1 has a rotary shaft that projects leftward and rightward from a power transmission unit to which power from a prime mover is transmitted. Further, weeding rotors are provided on the left and right sides of the power transmission unit. The weeding rotor rotates integrally with the rotating shaft to weed the above-ground grass.

JP-A-8-187006

By the way, it is considered that another weeding rotor (sub-weeding rotor) is attached to the side of the weeding rotor. If the sub weeding rotor is mounted by using bolts and nuts, there is a problem in that the sub weeding rotor is mounted with trouble and is troublesome.
Therefore, in view of the above problems, an object of the present invention is to provide a weeding device and a weeding rotor to which a sub-weeding rotor can be easily attached.

A weeding apparatus according to one aspect of the present invention includes a machine frame, a rotation shaft rotatably supported by the machine frame, a main weeding rotor that rotates with the rotation shaft to weed grass on the ground, and the rotation shaft. A weeding rotor having a sub-weeding rotor arranged side by side with the main weeding rotor in the axial direction of the main weeding rotor, the main weeding rotor and the one of the sub-weeding rotor, provided with an insertion hole, and the insertion hole from the An engagement hole having an engagement groove extending in the circumferential direction of the weeding rotor, the other provided in the main weeding rotor and the sub-weeding rotor, a shaft portion, and an end portion of the shaft portion, and An engaging pin having a head part that can be inserted into and removed from the insertion hole, wherein the shaft portion is located in the insertion hole with the head part passing through the insertion hole, and By rotating the sub weeding rotor with respect to the main weeding rotor, the sub weeding rotor is inserted into the engaging groove and abuts against the end of the engaging groove, and the wall portion forming the engaging hole is The head unit is engaged with the end portion of the engaging groove to limit the sub-weeding rotor from moving away from the main weeding rotor.

A plurality of the engagement holes are formed on a circumference centered on the axis of the rotation shaft, and engagement grooves of each engagement hole are formed in an arc shape centered on the axis of the rotation shaft. A plurality of the engagement pins are provided on the circumference having the same diameter as the circumference centered on the axis of the rotary shaft and centered on the axis of the rotary shaft.
Further, the rotation shaft is selectively rotatable in a first direction and a second direction opposite to the first direction, and the engagement groove is different from the insertion hole in the first direction. A first groove extending in the opposite direction and a second groove extending in the opposite direction to the second direction from the insertion hole are included.

Further, the main weeding rotor has a support shaft arranged concentrically with the rotation shaft and integrally rotating with the rotation shaft, and an outer member fixed to an outer end side of the support shaft, and the sub weeding The rotor has an inner member that is superposed on the outer member, the engagement hole is formed in the outer member, and the engagement pin is fixed to the inner member.
Further, a fixture for fastening the outer member and the inner member without tools is provided.

The sub weeding rotor is concentrically rotated with the main weeding rotor, and has a diameter smaller than the diameter of the main weeding rotor.
Further, the sub-weeding rotor is capable of weeding above the hem portion in a state where the main weeding rotor is located on the side of the hem portion which is the end portion side in the width direction of the mulch film laid on the ridge. ..

The sub-weeding rotor has a first sub-rotor provided on one side of the main weeding rotor and a second sub-rotor provided on the other side of the main weeding rotor.
A weeding rotor according to one aspect of the present invention, a main weeding rotor having a support shaft and a mowing blade provided around the support shaft, and the main weeding rotor arranged side by side in the axial direction of the support shaft, And a sub-weeding rotor having a grass-cutting blade different from the grass-cutting blade and provided around the extension line of the axis of the support shaft, and provided on one of the main weeding rotor and the sub-weeding rotor. Is provided in the other of the main weeding rotor and the sub-weeding rotor, an engagement hole having an insertion hole and an engagement groove extending from the insertion hole in the circumferential direction centered on the spindle. An engaging pin having a shaft portion and a head portion provided at an end portion of the shaft portion and capable of being inserted into and removed from the insertion hole, wherein the shaft portion has the head portion in the insertion hole. The sub weeding rotor is positioned in the insertion hole in a state of being passed, and is inserted into the engaging groove by contacting the end portion of the engaging groove by rotating the sub weeding rotor with respect to the main weeding rotor in the state. The wall portion forming the engagement hole is configured such that the head portion is engaged with the shaft portion in contact with the end portion of the engagement groove, and the sub weeding rotor is separated from the main weeding rotor. Has a regulation unit that regulates

A plurality of the engagement holes are formed on a circumference centered on the shaft center of the support shaft, and an engagement groove of each engagement hole is formed in an arc shape centered on the shaft center of the support shaft. A plurality of the engagement pins are provided on the circumference having the same diameter as the circumference centered on the shaft center of the support shaft and centered on the shaft center of the support shaft.
The main weeding rotor is selectively rotatable in a first direction and a second direction opposite to the first direction, and the engagement groove is opposite to the first direction from the insertion hole. A first groove extending in a direction and a second groove extending in a direction opposite to the second direction from the insertion hole.

The main weeding rotor has an outer member fixed to the outer end side of the support shaft, the sub-weeding rotor has an inner member superposed on the outer member, and the engagement hole is the outer side. Formed on a member, the engagement pin is fixed to the inner member.
A fixture for fastening the outer member and the inner member without tools is provided.
The sub weeding rotor rotates concentrically with the main weeding rotor and is formed to have a diameter smaller than the diameter of the main weeding rotor.

According to the above configuration, by rotating the sub-weeding rotor with respect to the main weeding rotor with the head of the engagement pin passing through the insertion hole of the engagement hole, the shaft portion is the end portion of the engagement groove. The main weeding rotor is brought into contact with the main weeding rotor so that the rotational force can be transmitted from the main weeding rotor to the sub weeding rotor. That is, the sub-weeding rotor can be easily attached by simply rotating the sub-weeding rotor with respect to the main weeding rotor.

It is a side view in the state where the weeding device was attached to the tractor. It is a side view of a weeding device. It is a rear view of a weeding device. It is a rear view of the state where the sub weeding rotor was attached to the main weeding rotor. It is the exploded perspective view which looked at the main weeding rotor and the sub-weeding rotor from the back left side. It is the side view which looked at the connection part of the main weeding rotor and the sub-weeding rotor from the inside of the machine body. It is the perspective view which looked at the main weeding rotor from the back left side. It is a rear view of a main weeding rotor. It is the side view which looked at the main weeding rotor from the outside of the machine. It is an expanded side view of an engagement hole and an oblong hole. It is a rear view of a sub weeding rotor. It is the perspective view which looked at the sub weeding rotor from the back right side. It is the perspective view which looked at the sub weeding rotor from the back left side. It is the side view which looked at the sub weeding rotor from the inside of the machine body. It is an enlarged side view of an engagement pin and a through hole. It is a rear surface disassembled perspective view which shows the fastening by a fixing tool. It is the perspective view which looked at the joint part of the main weeding rotor and the sub-weeding rotor from the front right side. It is the perspective view which looked at the joint part of the main weeding rotor and the sub-weeding rotor from the front right side. It is a back surface sectional view of an engaging portion of an engaging hole and an engaging pin. It is the side view which looked at the engagement part of an engagement hole and an engagement pin from the machine outside. It is the rear view which showed the case where the side of the ridge in which the mulch film was laid was weeded.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view showing a state in which a weeder 1 is attached to a tractor (traveling vehicle) 2 exemplified as a traveling body. FIG. 2 is a side view of the weeding device 1. FIG. 3 is a rear view of the weeding device 1.
In the present embodiment, the arrow A1 direction (the forward direction of the tractor 2) in FIGS. 1 and 2 is forward, the arrow A2 direction (the backward direction of the tractor 2) in FIGS. The arrow K1 direction will be described as the front-back direction. Therefore, the front side in FIGS. 1 and 2 is the left side (see the arrow B1 direction in FIG. 3), and the back side in FIGS. 1 and 2 is the right side (see the arrow B2 direction in FIG. 3).

Further, a horizontal direction (vehicle width direction of the tractor 2) orthogonal to the front-rear direction K1 will be described as a machine body width direction K2 of the weeding device 1. In addition, the direction from the central portion of the weeding device 1 in the machine width direction K2 to the right side or the left side will be described as the outside of the machine body. In other words, the outside of the machine means the machine width direction K2, which is the direction away from the center of the weeding device 1 in the width direction. Further, the direction opposite to the outside of the body will be described as the inside of the body. In other words, the inside of the machine is the machine width direction K2, which is a direction approaching the center of the weeding device 1 in the width direction.

As shown in FIG. 1, the tractor 2 includes a vehicle body 3 having an engine (motor) 3A and a mission case 3B. The front portion of the vehicle body 3 is supported by the front wheels 4, and the rear portion of the vehicle body 3 is supported by the rear wheels 5. That is, the tractor 2 has a wheel type traveling device having the front wheels 4 and the rear wheels 5. The traveling device may be a semi-crawler type traveling device having a crawler type traveling mechanism mounted instead of the rear wheels, or may be a full crawler type traveling device.

The power of the engine 3A is transmitted to the power transmission device in the mission case 3B, and the front wheels 4 and the rear wheels 5 are rotationally driven by the power transmitted to the power transmission device. A driver's seat 6 is mounted on the rear portion of the vehicle body 3. A steering handle 7 for steering the tractor 2 is provided in front of the driver's seat 6. A PTO shaft (output shaft) is provided at a rear portion of the vehicle body 3 so as to project rearward. The power of the power transmission mechanism in the mission case 3B can be taken out from the PTO shaft. The weeding device 1 is mounted on the rear portion of the vehicle body 3 so as to be able to move up and down via a mounting mechanism such as a three-point link mechanism or a two-point link mechanism. Further, the weeding device 1 is moved up and down by a hydraulic device equipped on the tractor 2. Power is transmitted from the PTO shaft to the weeding device 1. That is, the weeding device 1 is driven by the power of the engine (motor) 3A of the tractor 2.

As shown in FIGS. 2 and 3, the weeding device 1 has a machine frame 8 mounted on the tractor 2. The machine casing 8 includes a power transmission unit 9 to which power is transmitted from the PTO shaft of the tractor 2. The power transmission unit 9 includes a gear case 12, a PIC shaft (input shaft) 11, a transmission case 13, and a transmission mechanism 14.
The gear case 12 is arranged at the center of the weeding device 1 in the machine width direction K2. The PIC shaft 11 is provided on the gear case 12 so as to project toward the front side. The PIC shaft 11 is connected to the PTO shaft via a drive shaft having a universal joint, and inputs power from the tractor 2 into the gear case 12. The transmission case 13 is provided so as to project downward from the gear case 12. The inside of the transmission case 13 communicates with the inside of the gear case 12.

The transmission mechanism 14 is provided from the inside of the gear case 12 to the inside of the transmission case 13. The transmission mechanism 14 has a transmission shaft 15 provided inside the gear case 12. The transmission shaft 15 is supported by the gear case 12 so as to be rotatable about an axis in the machine body width direction K2 and movable in the axis direction.
The transmission mechanism 14 also has a first transmission portion 16 that transmits the power transmitted to the PIC shaft 11 to the transmission shaft 15. The first transmission unit 16 is configured by a bevel gear transmission mechanism, and has a first gear 16A, a second gear 16B, and a third gear 16C. The first gear 16A rotates integrally with the PIC shaft 11. The second gear 16B and the third gear 16C mesh with the first gear 16A.

By moving the transmission shaft 15 in the axial direction, the transmission shaft 15 rotates integrally with the second gear 16B and relatively rotates with the third gear 16C, and the transmission shaft 15 rotates integrally with the third gear 16C and relatively rotates with the second gear 16B. It is possible to switch to the state in which it is activated. That is, the power transmission path of the transmission mechanism 14 can be switched by moving the transmission shaft 15 in the axial direction. Specifically, by moving the transmission shaft 15 in the axial direction, the power transmitted to the PIC shaft 11 is transmitted to the transmission shaft 15 via the first gear 16A and the second gear 16B. It is possible to switch to the second path that is transmitted to the transmission shaft 15 via the first gear 16A and the third gear 16C.

Further, the transmission mechanism 14 has a second transmission portion 17 that transmits the power transmitted to the transmission shaft 15 to the lower portion 13a of the transmission case 13. The second transmission portion 17 is wound around the first sprocket 17A that rotates integrally with the transmission shaft 15, the second sprocket 17B arranged in the lower portion 13a of the transmission case 13, and the first sprocket 17A and the second sprocket 17B. With a chain 17C.

As shown in FIG. 3, the weeding device 1 has a rotary shaft 18 rotatably supported by the machine frame 8. Specifically, the rotating shaft 18 has an axis Y1 extending in the machine body width direction K2, and is supported by the lower portion 13a of the transmission case 13 (the lower portion of the power transmission portion 9) so as to be rotatable around the axis. The second sprocket 17B is attached to the rotating shaft 18. Therefore, the power transmitted to the PIC shaft 11 is transmitted to the rotary shaft 18 via the transmission mechanism 14, and the rotary shaft 18 rotates. In other words, the rotary shaft 18 is driven by the power of the tractor 2.

The rotary shaft 18 is provided so as to project from the transmission case 13 (power transmission portion 9) to one side (left side) and the other side (right side) of the machine body width direction K2. Specifically, the rotary shaft 18 has a first shaft portion 18a that projects leftward from the transmission case 13 and a second shaft portion 18b that projects rightward from the transmission case 13. The first shaft portion 18a and the second shaft portion 18b are rotatably supported by bearings 26 provided in the lower portion of the transmission case 13.

The rotary shaft 18 does not have to be configured by one shaft member, and may be configured by a plurality of shaft members. For example, the transmission case 13 may be formed of a shaft member protruding leftward and a shaft member protruding rightward.
As shown in FIG. 3, the weeding device 1 has a mowing section 19 provided in the lower part of the machine frame 8. The mowing unit 19 includes a weeding rotor 21 that rotates together with the rotary shaft 18 to weed the grass G2 on the ground (on the ground G1). The weeding rotor 21 extends in the axial direction of the rotary shaft 18 (direction along the axial center Y1). As shown in FIG. 2, the weeding rotor 21 rotates around the axis Y1 of the rotary shaft 18 in the first direction (rotational direction) indicated by the arrow X1 or in the second direction (rotational direction) indicated by the arrow X2, and the tractor is rotated. Weed forward to remove grass G2 on the ground while moving forward. The weeding device 1 may be a weeding device in which the weeding rotor 21 rotates only in the first direction X1.

The transmission shaft 15 switches the rotation directions of the weeding rotor 21 and the rotation shaft 18. For example, when the power transmission path of the transmission mechanism 14 is switched to the first path, the weeding rotor 21 and the rotary shaft 18 rotate in the first direction X1 (normal rotation direction), and when the power transmission path is switched to the second path, the weeding rotor 21 and the rotary shaft 21. 18 rotates in the second direction X2 (reverse rotation direction). That is, the weeding rotor 21 and the rotating shaft 18 are selectively rotatable in the first direction X1 and the second direction X2 opposite to the first direction X1.

As shown in FIG. 3, the weeding rotor 21 is arranged side by side with the main weeding rotor 22 that rotates with the rotating shaft 18 to weed the grass G2 on the ground, and the main weeding rotor 22 in the axial direction of the rotating shaft 18. And a sub-weeding rotor 23 that rotates together with the weeding rotor 22. In the present embodiment, the sub-weeding rotor 23 is a weeding rotor that weeds above the lower end of the main weeding rotor 22.

As shown in FIGS. 3 to 6, the main weeding rotor 22 includes a first main rotor 22L and a second main rotor 22R. The first main rotor 22L and the second main rotor 22R are arranged side by side in the axial direction of the rotary shaft 18. Specifically, the first main rotor 22L is arranged to the left of the transmission case 13 (power transmission unit 9) and is attached to the first shaft portion 18a so as to be integrally rotatable. The second main rotor 22R is arranged on the right side of the transmission case 13, and is attached to the second shaft portion 18b so as to be integrally rotatable.

As shown in FIG. 4 and FIG. 5, the main weeding rotor 22 (first main rotor 22L, second main rotor 22R) is composed of a squirrel-cage rotor, and the outer shape rotated around the rotation axis 18 is a machine body. It has a cylindrical shape having an axis extending in the width direction K2.
As shown in FIGS. 3 and 7 to 9, the first main rotor 22L includes a support shaft 24 connected to the rotating shaft 18, and a mowing blade (referred to as a first mowing blade) provided around the support shaft 24. ) 25 and. Similarly, the second main rotor 22R also has a support shaft 24 and a grass cutting blade (first grass cutting blade) 25 provided around the support shaft 24.

The support shaft 24 is concentrically connected to the rotary shaft 18. Specifically, the support shaft 24 is formed in a tubular shape having an axis Y2 extending in the machine body width direction K2, is concentrically arranged on the rotary shaft 18, and is fitted to the outside of the rotary shaft 18. As shown in FIGS. 4 and 8, the support shaft 24 has an axis Y2 that extends in the machine body width direction K2. As shown in FIG. 3, when the support shaft 24 is connected to the connecting shaft 18, the shaft 24 is not supported. The center Y2 coincides with the axis Y1. Further, the support shaft 24 is coupled to the rotary shaft 18 by a fixture such as a bolt and rotates integrally with the rotary shaft 18.

As shown in FIGS. 7 and 8, the first grass cutting blade 25 is provided around the support shaft 24 in a spiral shape. Further, a plurality of the first mowing blades 25 are provided. It should be noted that at least one first mowing blade 25 may be provided. The first grass cutting blade 25 is provided across an inner frame member 28 provided on the inner side of the first main rotor 22L in the body and an outer frame member 29 provided on the outer side of the body. The inner frame member 28 and the outer frame member 29 are formed in a ring shape by a rod material such as a pipe material. The inner frame member 28 and the outer frame member 29 are formed to have the same diameter and are concentric with the axis Y2 of the support shaft 24 (axis Y1 of the rotary shaft 18).

The inner frame member 28 is connected to the support shaft 24 by a plurality of rods 61 extending from the end of the support shaft 24 on the inner side of the body toward the inner frame member 28. A reinforcing plate 62 that reinforces the plurality of rods 61 is fixed to the end of the support shaft 24 on the inner side of the body.
The first main rotor 22L has an end plate (outer member) 63 provided on the outer side of the body of the first main rotor 22L. The end plate 63 is fixed to the end of the support shaft 24 on the outer side of the machine body. The outer frame member 29 is fixed to the end plate 63. Specifically, the end plate 63 is arranged inside the outer frame member 29, and the central portion 63 a (wall portion) located on the center side of the outer frame member 29 is fixed to the end portion of the support shaft 24. Further, the end plate 63 has a plurality of connecting portions 63b extending radially from the central portion 63a toward the outer frame member 29. The outer end portion (the end portion in the extending direction) of each connecting portion 63b is fixed to the outer frame member 29.

Similarly, the second main rotor 22R has an inner frame member 28, an outer frame member 29, an end plate (outer member) 63, a plurality of rods 61 and a reinforcing plate 62, and is configured similarly to the first main rotor 22L. It Further, the following configuration is also configured in the same manner with the first main rotor 22L and the second main rotor 22R.
As shown in FIG. 9, a plurality of engaging holes 64 and a plurality of elongated holes 65 are formed in the central portion 63a of the end plate 63. In the present embodiment, each of the plurality of engaging holes 64 and the plurality of elongated holes 65 is formed in threes. As shown in FIG. 10, the plurality of engagement holes 64 and the plurality of elongated holes 65 are formed on the same circumference F1 around the axis Y2 of the support shaft 24 (axis Y1 of the rotary shaft 18). There is. The plurality of engagement holes 64 are formed at equal intervals in the circumferential direction E1 of the weeding rotor 21 (circumferential direction around the axis Y1 and the axis Y2). The plurality of elongated holes 65 are formed at equal intervals in the circumferential direction E1, and are formed one by one between two engagement holes 64 that are adjacent to each other in the circumferential direction E1. Specifically, the elongated hole 65 is formed in the central portion between the adjacent engaging holes 64.

As shown in FIG. 10, each engagement hole 64 has an insertion hole 66 and an engagement groove 67 extending from the insertion hole 66 in the circumferential direction E1. The insertion hole 66 is formed as a hole having a diameter larger than the groove width of the engagement groove 67. Further, the insertion hole 66 and the engagement groove 67 are formed continuously. The engagement groove 67 is formed in an arc shape centered on the axis Y1 (axis Y2). The engagement groove 67 includes a first groove 67a extending from the insertion hole 66 in the direction opposite to the first direction X1, and a second groove 67b extending from the insertion hole 66 in the direction opposite to the second direction X2.

As shown in FIG. 20, a portion around the first groove 67a and the second groove 67b is a restriction portion 63c with which a head portion 70a of an engagement pin 70 described later engages. That is, the central portion 63a, which is the wall portion forming the engagement hole 64, has the regulation portion 63c with which the head portion 70a is engaged.
Each long hole 65 is a hole extending in the circumferential direction E1 (long in the circumferential direction E1). The length of the elongated hole 65 in the circumferential direction E1 is substantially the same as the length of the engaging hole 64 in the circumferential direction E1.

As shown in FIG. 3, the rotor diameter D1 of the first main rotor 22L and the rotor diameter D2 of the second main rotor 22R are formed to have the same diameter. The rotor diameter means a diameter of a circle which is a rotation locus of the cage rotor. That is, the rotor diameter D1 is the diameter of the first main rotor 22L, and the rotor diameter D2 is the diameter of the second main rotor 22R.
As shown in FIG. 3, the sub weeding rotor 23 is provided on one side (left side) of the main weeding rotor 22 and on the other side (right side) of the main weeding rotor 22. The second sub-rotor 23R is included. Specifically, the first sub-rotor 23L is arranged on the left side of the first main rotor 22L in the axial direction of the rotary shaft 18 (axial direction of the support shaft 24). The first sub-rotor 23L is attached to the first main rotor 22L and rotates integrally with the first main rotor 22L concentrically. The second sub-rotor 23R is arranged on the right side of the second main rotor 22R side by side in the axial direction of the rotary shaft 18 (axial direction of the support shaft 24). The second sub-rotor 23R is attached to the second main rotor 22R and rotates integrally with the second main rotor 22R concentrically.

The sub-weeding rotor 23 (first sub-rotor 23L, second sub-rotor 23R) is composed of a squirrel-cage rotor, and has a columnar shape whose outer shape rotated about the axis has an axis extending in the machine body width direction K2. Present.
As shown in FIGS. 3 to 6 and FIGS. 11 to 13, the first sub-rotor 23L includes a plate member (inner member) 68 that is superposed on the end plate 63 of the first main rotor 22L, and a plate member (inner member). A ring-shaped end frame 30 arranged at a space 68 outside the machine body, and a mowing blade (referred to as a second mowing blade) 31 provided around the extension line of the axis Y1 (axis Y2). Have. Similarly, the second sub rotor 23R has a plate member (inner member) 68, an end frame 30, and a mowing blade (second mowing blade) 31, and is configured similarly to the first sub rotor 23L.

The plate member 68 is formed in a disk shape having a smaller diameter than the outer frame member 29 of the first main rotor 22L.
The second mowing blade 31 is provided spirally around the extension of the axis Y1 (axis Y2). The second mowing blade 31 is provided across the end frame 30 and the outer peripheral portion of the plate member 68. Therefore, the end frame 30 and the plate member 68 are connected by the second mowing blade 31. A plurality of second mowing blades 31 are provided. It should be noted that at least one second mowing blade 31 may be provided.

As shown in FIGS. 12 to 14, a circular opening hole 69 is formed on the center side of the plate member 68. The opening hole 69 has a larger diameter than the shaft diameter of the support shaft 24, and is located at a position corresponding to the outer end of the support shaft 24 when the plate member 68 is superposed on the end plate 63. A plurality of engagement pins 70 and a plurality of through holes 71 are formed in the plate member 68 around the opening hole 69.

As shown in FIG. 15, the plurality of engagement pins 70 and the plurality of through holes 71 are formed on the same circumference F2 around the axis Y1 of the rotary shaft 18 (the axis Y2 of the support shaft 24). There is. The circumference F2 has the same diameter as the circumference F1. In the present embodiment, each of the plurality of engagement pins 70 and the plurality of through holes 71 is provided in threes. The plurality of engagement pins 70 are provided at equal intervals in the circumferential direction E1 of the weeding rotor 21. The plurality of through holes 71 are formed at equal intervals in the circumferential direction E1, and one through hole 71 is formed between two engagement pins 70 adjacent to each other in the circumferential direction E1. Specifically, the through hole 71 is formed in the central portion between the adjacent engagement pins 70.

As shown in FIGS. 11 and 19, each engagement pin 70 has a shaft portion 70b and a head portion 70a provided at the end of the shaft portion 70b.
As shown in FIG. 19, the shaft portion 70b penetrates the plate member 68 and is fixed to the plate member 68 by welding or the like. The shaft portion 70b projects from the plate member 68 toward the inside of the body. As shown in FIG. 20, the shaft diameter (shaft diameter) of the shaft portion 70b is substantially the same as the groove width of the engagement groove 67 and can be inserted into the engagement groove 67 (movable in the engagement groove 67). It is formed to a size.

As shown in FIG. 19, the head portion 70a is fixed to the end portion of the shaft portion 70b on the inner side of the body.
As shown in FIG. 20, the head portion 70 a is formed with a diameter larger than the shaft diameter of the shaft portion 70 b and slightly smaller than the insertion hole 66. Therefore, the head portion 70a can be inserted into and removed from the insertion hole 66 by moving the sub weeding rotor 23 (first sub rotor 23L, second sub rotor 23R) in the machine body width direction K2. Further, as shown in FIG. 19, the shaft portion 70 b is positioned inside the insertion hole 66 in a state where the head portion 70 a is passed through the insertion hole 66.

As shown in FIG. 19, the distance H1 between the head 70a and the plate member 68 is substantially the same as the plate thickness of the end plate 68, and the machine of the end plate 63 with the head 70a passing through the insertion hole 66. It is formed in such a size that it can move inside the body.
As shown in FIG. 15, each through hole 71 is formed as a circular hole.
As shown in FIG. 4, the weeding rotor 21 has a fixture 72 that fastens the end plate (outer member) 63 and the plate member (inner member) 68 without using a tool (a tool such as a spanner or a wrench is not used). .. In the present embodiment, the fixture 72 is composed of a wing bolt 72A and a wing nut 72B. The end plate 63 and the plate member 68 are fastened by inserting the wing bolt 72A into the elongated hole 65 and the through hole 71 and screwing the wing nut 72B into the wing bolt 72A. As a result, the sub weeding rotor 23 is prevented from rotating with respect to the main weeding rotor 22. Specifically, the first sub rotor 23L is prevented from rotating with respect to the first main rotor 22L, and the second sub rotor 23R is prevented from rotating with respect to the second main rotor 22R. Although three fixtures 72 are provided in the present embodiment, one or two fixtures may be provided, or four or more fixtures may be provided.

The rotor diameter (diameter) D3 of the first sub-rotor 23L and the rotor diameter (diameter) D4 of the second sub-rotor 23R are formed to have the same diameter. The rotor diameter D3 and the rotor diameter D4 are smaller than the rotor diameter D1 and the rotor diameter D2. Therefore, the sub weeding rotor 23 weeds above the lower end of the main weeding rotor 22. In other words, the step 32 is provided between the lower end of the main weeding rotor 22 and the lower end of the sub weeding rotor 23.

In the present embodiment, a plurality of engagement holes 64 are formed in the end plate (outer member) 63 and a plurality of engagement pins 70 are provided in the plate member (inner member) 68. The engaging pins 70 may be provided and the plate member 68 may be provided with a plurality of engaging holes 64. That is, one of the main weeding rotor 22 and the sub-weeding rotor 23 has a plurality of engaging holes 64, and the other has a plurality of engaging pins 70 that engage with the respective engaging holes 64.

Next, a procedure for mounting (connecting) the sub weeding rotor 23 to the main weeding rotor 22 will be described.
In the mounting procedure described below, a case where the first sub rotor 23L is mounted to the first main rotor 22L will be described with reference to FIGS. 17 to 20, and a case where the second sub rotor 23R is mounted to the second main rotor 22R. Since the procedure is the same as the procedure for mounting the first sub rotor 23L on the first main rotor 22L, the description thereof will be omitted.

17 to 20 show a procedure for mounting the first sub rotor 23L on the first main rotor 22L when the weeding rotor 21 is rotated in the first direction X1. 17 and 18 are perspective views of the connecting portion of the first main rotor 22L and the first sub rotor 23L as viewed from the front right side. 19 shows a rear cross-sectional view of the engaging portion between the engaging hole 64 and the engaging pin 70, and FIG. 20 shows the engaging portion between the engaging hole 64 and the engaging pin 70 from the outside of the machine body. The side view which it saw is shown.

First, as shown in FIG. 17, the first sub-rotor 23L is arranged laterally of the first main rotor 22L so that the plate member 68 faces the end plate 63 in the machine body width direction K2.
Next, the first sub-rotor 23L is brought close to the first main rotor 22L, and the head portion 70a of the engagement pin 70 is inserted into and passed through the insertion hole 66 of the engagement hole 64, as shown in the drawing on the right side of FIG. (See the phantom line in FIG. 19). When the head portion 70a is passed through the insertion hole 66, the plate member 68 is superposed on the end plate 63 as shown in FIG. As shown in FIGS. 19 and 20, the shaft portion 70 b is located inside the insertion hole 66 when the head portion 70 a is passed through the insertion hole 66. Further, in the state where the head portion 70 a is passed through the insertion hole 66, the through hole 71 is located at the center of the elongated hole 65 in the longitudinal direction.

Next, from the state where the head portion 70a has passed through the insertion hole 66, as shown in FIG. 18, the first sub-rotor 23L is in a direction opposite to the first direction X1 which is the rotation direction with respect to the first main rotor 22L. It is rotated in the direction of arrow X3 in FIGS. 18 and 20. Then, as shown in FIGS. 19 and 20, the shaft portion 70b is inserted into the first groove 67a and abuts on the end portion 64a of the first groove 67a (engagement groove) (see the left side view of FIG. 18). ). As a result, the rotational force can be transmitted from the first main rotor 22L to the first sub rotor 23L. That is, when the first main rotor 22L rotates in the first direction X1, the end portion 64a of the first groove 67a pushes the shaft portion 70b, which causes the power from the first main rotor 22L to the first sub rotor 23L. Is transmitted, and the first sub-rotor 23L rotates integrally with the first main rotor 22L. The same applies to the case of the second sub rotor and the second main rotor.

As shown in FIG. 20, when the shaft portion 70b is in contact with the end portion 64a of the first groove 67a, the head portion 70a engages with the restriction portion 63c. By engaging (contacting) the head portion 70a with the restricting portion 63c, it is restricted that the first sub rotor 23L (sub weeding rotor 23) separates from the first main rotor 22L (main weeding rotor 22).
On the other hand, in the state where the shaft portion 70b is in contact with the end portion 64a of the first groove 67a, the through hole 71 is located at the end portion of the elongated hole 65, and the wing bolt 72A and the wing nut 72B allow the plate member 68 to move. And the end plate 63 can be fastened.

As described above, by rotating the sub weeding rotor 23 (first sub rotor 23L, second sub rotor 23R) with respect to the main weeding rotor 22 (first main rotor 22L, second main rotor 22R), the sub weeding rotor 23 Can be easily (one-touch) attached to the main weeding rotor 22. Further, by fastening the plate member 68 and the end plate 63 with the wing bolt 72A and the wing nut 72B, it is possible to prevent rotation of the sub weeding rotor 23 with respect to the main weeding rotor 22 in the rotation direction without tools.

When rotating the weeding rotor 21 in the second direction X2, the sub-weeding rotor 23 (the first sub-rotor 23L, the second sub-rotor 23R) is moved to the main state from the state where the head portion 70a is passed through the insertion hole 66. The weeding rotor 22 (first main rotor 22L, second main rotor 22R) is rotated in the direction opposite to the second direction X2 (the direction opposite to the arrow X3 direction shown in FIG. 20). In this case, the shaft portion 70b is inserted into the second groove 67b and abuts on the end portion 64b (see FIG. 20) of the second groove 67b. Therefore, when rotating the weeding rotor 21 in the second direction X2, the power is transmitted from the main weeding rotor 22 to the sub weeding rotor 23 by pushing the shaft portion 70b by the end portion 64b of the second groove 67b. ..

When the weeding rotor 21 is rotated in the first direction X1 also by exchanging the set of the first main rotor 22L and the first sub-rotor 23L and the set of the second main rotor 22R and the second sub-rotor 23R. And the case of rotating in the second direction X2 can be dealt with. Therefore, the engagement groove 67 can be configured by only one of the first groove 67a and the second groove 67b. The first grass cutting blade 25 and the second grass cutting blade 31 may be single-edged or double-edged. Further, the mounting structure of the sub weeding rotor 23 of the present embodiment is also applicable to a case where the sub weeding rotor 23 having the same diameter as the main weeding rotor 22 is mounted.

FIG. 21 shows a case where the side of the ridge U1 on which the mulch film M1 is laid is weeded by the weeding device 1. The mulch film M1 covers the ridge U1 and the hem portion Ma, which is the end portion in the width direction of the mulch film M1, is pressed by the buried soil S1 which is soil covering the skirt portion Ma. Grass also grows on this buried soil S1.
For example, in the case of the weeding rotor 21 in which the sub-weeding rotor 23 is not provided, when weeding the side of the ridge U1, the weeding device 1 is moved to the ridge U1 in order to weed above the hem Ma of the mulch film M1. The weeding rotor 21 may catch the hem Ma, and the weeding rotor 21 may wind up the mulch film M1.

On the other hand, in the weeding apparatus 1 of the present embodiment, since the sub-weeding rotor 23 is provided, when weeding the side of the ridge U1 on which the mulch film M1 is laid, as shown in FIG. 4, weeding is performed. When the rotor 21 is brought close to the ridge U1, the skirt Ma is located below the sub weeding rotor 23 due to the step 32 between the lower end of the main weeding rotor 22 and the lower end of the sub weeding rotor 23. As a result, it is possible to weed the edges of the mulch film M1 without catching the mulch film M1. That is, the main weeding rotor 22 can weed the lateral sides of the hem Ma of the multi-film M1, and the sub weeding rotor 23 can weed the upper part of the hem Ma. Thereby, weeding can be performed until the mulch film M1.

Further, in the present embodiment, the first sub-rotor 23L is provided on one side of the main weeding rotor 22 and the second sub-rotor 23R is provided on the other side, so that the ridges U1 and the ridges on which the multi-film M1 is laid are provided. When weeding the furrow groove, which is a groove between U1 and U1, weeding was performed by the first sub-rotor 23L above the hem Ma of the multi-film M1 laid on one ridge U1 and laid on the other ridge U1. The upper part of the bottom Ma of the multi-film M1 can be weeded by the second sub-rotor 23R.

As shown in FIG. 2, the weeding device 1 has a cover body 36 attached to the machine frame 8. The cover body 36 is disposed on the left side of the upper cover 37, an upper cover 37 that covers the upper part of the mowing section 19 (main weeding rotor 22), a rear cover 38 that covers the rear of the mowing section 19 (the weeding rotor 21). The first side cover 39L is provided, and the second side cover 39R is provided on the right side of the upper cover 37. The upper cover 37 is attached to the machine frame 8.

The machine casing 8 has a support arm 40 including a left support arm 40L protruding leftward from the gear case 12 and a right support arm 40R protruding rightward from the gear case 12. The upper cover 37 is attached to the attachment member 41L attached to the support arm 40L and the attachment member 41R attached to the support arm 40R.
A pivot 42 having an axis in the machine width direction K2 is provided at a rear portion of the upper cover 37, and an upper portion of the rear cover 38 is provided on the rear of the upper cover 37 around the axis in the machine width direction K2 via the pivot 42. It is swingably supported. As a result, the rear cover 38 can swing up and down (upward and downward).

The rear cover 38 has a ground leveling section 38a that is grounded on the side of the ground G1 to level a weeding trace T1 that is a trace of weeding by the mowing section 19 (main weeding rotor 22).
As shown in FIG. 2, the weeding device 1 has a lowering device 43 that urges the rear cover 38 downward.
The lowering device 43 has a rod 44 and a biasing member 45. The front portion of the rod 44 is pivotally supported by a support piece 46 provided on the support arm 40. A holder 48 is provided on an upper portion of a bracket 47 protruding from the upper portion of the rear cover 38, and the rear portion of the rod 44 is inserted through the holder 48 so as to be movable in the axial direction. The holder 48 is supported by the bracket 47 so as to be rotatable around the axis in the machine width direction K2.

The biasing member 45 is composed of a coil spring, is arranged on the front side of the holder 48, and is fitted to the outside of the rod 44. The rod 44 is provided with a spring receiving member 49 whose position is adjustable in the axial direction, and the biasing member 45 is interposed between the holder 48 and the spring receiving member 49 in a compressed state. As a result, the biasing member 45 biases the rear cover 38 downward (toward the ground). The biasing force of the biasing member 45 can be changed by adjusting the position of the spring receiving member 49 in the axial direction of the rod 44.

As shown in FIG. 2, the weeding device 1 has a height setting device 50 that defines (sets) the height of the weeding device 1. By the height setting device 50, the weeding rotor 21 is set to, for example, a height at which the grass G2 on the ground is weeded while shaving the surface of the ground G1.
The height setting device 50 includes a support frame 51, a gauge wheel 52, and a height adjusting mechanism 53. A front portion of the support frame 51 is pivotally supported by the machine frame 8 and can swing up and down. The gauge wheel 52 is supported on the rear portion of the support frame 51 via a column member 54, a wheel frame 55, and the like. The height adjustment mechanism 53 is provided between the support frame 51 and the mast 56 attached to the gear case 12, and regulates the vertical swing of the support frame 51. Further, the height adjusting mechanism 53 can be expanded and contracted in the length direction by the operation of the operation handle 57 and the like, and by expanding and contracting the height adjusting mechanism 53, the support frame 51 can be swung up and down. ..

The height of the weeding rotor 21 is regulated by the grounding of the gauge wheel 52. Further, the height of the weeding rotor 21 can be changed by swinging the support frame 51 up and down.
In the present embodiment described in detail above, the tractor-mounted (vehicle-mounted) weeding apparatus 1 mounted on the tractor 2 as the traveling body has been illustrated, but the present invention is not limited to this. For example, it is adopted in a self-propelled weeding work machine in which a weaving device 1 and a self-propelled self-propelled machine (traveling body) having a prime mover and a traveling device driven by the prime mover are integrally configured. The weed control device 1 may be used. As this self-propelled weeding machine, the self-propelled machine is provided with a steering handle or the like to be gripped by the operator, and a worker holding the steering handle walks while manipulating the working machine while walking. Type weeding machine, or a riding type weeding machine in which a self-propelled machine is equipped with a steering wheel for operating the driver's seat and traveling device and an operator seated in the driver's seat controls the machine. Conceivable. Also in this self-propelled weeding machine, power is transmitted from the prime mover to the mowing section 19 (weeding rotor 21) via the power transmission section. In addition, a weeding rotor 21, a prime mover that drives the weeding rotor 21, and a power transmission unit that transmits the power of the prime mover to the weeding rotor 21 in a traveling machine body (running body) including a traveling device such as wheels and a steering handle. The weeding machine 1 may be the weeding machine equipped with the weeding machine, and the weeding machine 1 may be a hand-operated weeding machine that is manually moved by an operator holding a steering handle.

The weeding device 1 and the weeding rotor 21 of the present embodiment have the following effects.
That is, the weeding apparatus 1 of the present embodiment includes a machine frame 8, a rotary shaft 18 rotatably supported by the machine frame 8, a main weeding rotor 22 that rotates together with the rotary shaft 18 to weed the grass G2 on the ground. A weeding rotor 21 having a main weeding rotor 22 and a sub weeding rotor 23 arranged side by side in the axial direction of the rotary shaft 18, and one of the main weeding rotor 22 and the sub weeding rotor 23. And an engagement hole 64 having an engagement groove 67 extending from the insertion hole 66 in the circumferential direction E1 of the weeding rotor 21, a shaft portion 70b provided in the other of the main weeding rotor 22 and the sub weeding rotor 23, and An engaging pin 70 provided at an end of the shaft portion 70b and having a head portion 70a that can be inserted into and removed from the insertion hole 66, and the shaft portion 70b allows the head portion 70a to pass through the insertion hole 66. Is positioned inside the insertion hole 66, and in this state, the sub weeding rotor 23 is rotated with respect to the main weeding rotor 22 so that the sub weeding rotor 23 is inserted into the engagement groove 67 and ends 64a, 64b of the engagement groove 67. The head portion 70a engages with the wall portion (the central portion 63a) that abuts on the engaging hole 64 and the shaft portion 70b abuts the end portions 64a and 64b of the engaging groove 67, and the sub weeding is performed. The rotor 23 has a restricting portion 63c that restricts the rotor from separating from the main weeding rotor 22.

According to this configuration, by rotating the sub weeding rotor 23 with respect to the main weeding rotor 22 with the head portion 70a of the engagement pin 70 passing through the insertion hole 66 of the engagement hole 64, the shaft portion 70b is moved. Rotational force can be transmitted from the main weeding rotor 22 to the sub weeding rotor 23 by contacting the end of the engaging groove 67, and the head 70a engages with the restricting portion 63c to cause the sub weeding rotor 23 to main weeding. Separation from the rotor 22 is restricted. That is, by simply rotating the sub-weeding rotor 23 with respect to the main weeding rotor 22, the sub-weeding rotor 23 can be attached easily (with one touch).

Further, a plurality of engagement holes 64 are formed on the circumference F1 around the axis Y1 of the rotary shaft 18, and the engagement groove 67 of each engagement hole 64 is centered around the axis Y1 of the rotary shaft 18. A plurality of engaging pins 70 are formed on the circumference F2 having the same diameter as the circumference F1 centering on the axis Y1 of the rotary shaft 18 and centering on the axis Y1 of the rotary shaft 18. It may be.
According to this configuration, when the sub weeding rotor 23 is mounted on the main weeding rotor 22, the shaft portion 70b is inserted into the engagement groove 67, so that the axial center of the sub weeding rotor 23 is set to the axial center of the main weeding rotor 22. Can be matched to. Thereby, the sub-weeding rotor 23 can be easily centered.

Further, the rotating shaft 18 is selectively rotatable in the first direction X1 and the second direction X2 opposite to the first direction X1, and the engagement groove 67 extends from the insertion hole 66 to the first direction X1. It may include a first groove 67a extending in a direction opposite to the direction and a second groove 67b extending from the insertion hole 66 in a direction opposite to the second direction X2.
With this configuration, in the weeding device 1 that selectively rotates the weeding rotor 21 in the first direction X1 or the second direction X2, the sub-weeding rotor 23 can be easily attached.

Further, the main weeding rotor 22 includes a support shaft 24 arranged concentrically with the rotary shaft 18 and rotating integrally with the rotary shaft 18, and an outer member (end plate 63) fixed to the outer end side of the support shaft 24. The sub-weeding rotor 23 has an inner member (plate member 68) that is superposed on the outer member (end plate 63), and the engagement hole 64 is formed in the outer member (end plate 63) and engaged. The pin 70 may be fixed to the inner member (plate member 68).

According to this configuration, by providing the sub-weeding rotor 23 with the engagement pin 70, when the head 70a is passed through the insertion hole 66, the positional relationship between the head 70a and the insertion hole 66 can be easily visually confirmed. Therefore, the head portion 70a can be easily inserted into the insertion hole 66.
Further, a fixture 72 for fastening the outer member (end plate 63) and the inner member (plate member 68) without tools may be provided.

According to this structure, the rotation stop in the direction opposite to the mounting direction of the sub weeding rotor 23 with respect to the main weeding rotor 22 can be performed without a tool.
Further, the sub-weeding rotor 23 may rotate concentrically with the main weeding rotor 22 and may have diameters D3 and D4 smaller than the diameters D1 and D2 of the main weeding rotor 22.
With this configuration, the sub weeding rotor 23 can weed the grass above the lower end of the main weeding rotor 22. Thereby, for example, when weeding laterally of the ridge U1 on which the mulch film M1 is laid, there is a step 32 between the lower end of the main weeding rotor 22 and the lower end of the sub weeding rotor 23. Weeding can be performed up to the mulch film M1 without catching the hem Ma of the mulch film M1. Further, the weeding rotor 21 having a step between the lower end of the main weeding rotor 22 and the lower end of the sub weeding rotor 23 can be easily formed.

In addition, the sub weeding rotor 23 is above the hem Ma while the main weeding rotor 22 is located beside the hem Ma that is an end side in the width direction of the multi-film M1 laid on the ridge U1. It may be possible.
According to this structure, when weeding the side of the ridge U1 on which the multi-film M1 is laid, the main weeding rotor 22 weeds the side of the hem Ma of the multi-film M1 and the sub-weeding rotor 23 weeds the hem Ma. The upper part of the can be weeded. Thereby, weeding can be performed until the mulch film M1.

The sub weeding rotor 23 may include a first sub rotor 23L provided on one side of the main weeding rotor 22 and a second sub rotor 23R provided on the other side of the main weeding rotor 22. ..
According to this structure, the ridge groove between the ridge U1 on which the multi-film M1 is laid and the ridge U1 can be satisfactorily weeded.

Further, the weeding rotor 21 of the present embodiment has a main weeding rotor 22 having a support shaft 24 and a grass cutting blade (first grass cutting blade 25) provided around the support shaft 24, and an axial center direction of the support shaft 24. A grass cutting blade (a second grass cutting blade) arranged next to the main weeding rotor 22 and different from the grass cutting blade (first grass cutting blade 25) and provided around the extension of the axis Y2 of the support shaft 24. A sub-weeding rotor 23 having a blade 31) and one of the main weeding rotor 22 and the sub-weeding rotor 23, and an insertion hole 66 and a member extending from the insertion hole 66 in the circumferential direction E1 centered on the support shaft 24. An engaging hole 64 having a mating groove 67 is provided on the other of the main weeding rotor 22 and the sub weeding rotor 23, and is provided on the shaft portion 70b and the end portion of the shaft portion 70b and with respect to the insertion hole 66. An engaging pin 70 having an insertable/detachable head portion 70a, and the shaft portion 70b is located in the insertion hole 66 with the head portion 70a passing through the insertion hole 66, and in this state By rotating the weeding rotor 23 with respect to the main weeding rotor 22, the weeding rotor 23 is inserted into the engagement groove 67 and abuts against the end portions 64a and 64b of the engagement groove 67 to form the engagement hole 64. 63a) has a restricting portion 63c that restricts the head 70a from engaging and the sub weeding rotor 23 from moving away from the main weeding rotor 22 in a state where the shaft portion 70b is in contact with the end of the engaging groove 67. ..

According to this configuration, by rotating the sub weeding rotor 23 with respect to the main weeding rotor 22 with the head portion 70a of the engagement pin 70 passing through the insertion hole 66 of the engagement hole 64, the shaft portion 70b is moved. Rotational force can be transmitted from the main weeding rotor 22 to the sub weeding rotor 23 by contacting the end of the engaging groove 67, and the head 70a engages with the restricting portion 63c to cause the sub weeding rotor 23 to main weeding. Separation from the rotor 22 is restricted. That is, by simply rotating the sub-weeding rotor 23 with respect to the main weeding rotor 22, the sub-weeding rotor 23 can be attached easily (with one touch).

Further, a plurality of engagement holes 64 are formed on a circumference F1 centered on the shaft center Y2 of the support shaft 24, and the engagement groove 67 of each engagement hole 64 is centered on the shaft center Y2 of the support shaft 24. A plurality of engagement pins 70 are formed on the circumference F2 having the same diameter as the circumference F1 centered on the shaft center Y2 of the support shaft 24 and centered on the shaft center Y2 of the support shaft 24. It may be.
According to this configuration, when the sub weeding rotor 23 is mounted on the main weeding rotor 22, the shaft portion 70b is inserted into the engagement groove 67, so that the axial center of the sub weeding rotor 23 is set to the axial center of the main weeding rotor 22. Can be matched to. Thereby, the sub-weeding rotor 23 can be easily centered.

Further, the main weeding rotor 22 is selectively rotatable in a first direction X1 and a second direction X2 opposite to the first direction X1, and the engagement groove 67 extends from the insertion hole 66 to the first direction. It may include a first groove 67a extending in the direction opposite to X1 and a second groove 67b extending from the insertion hole 66 in the direction opposite to the second direction X2.
According to this configuration, when the weeding rotor 21 is mounted on the weeding device 1 that can selectively rotate in the first direction X1 or the second direction X2, it is possible to facilitate the mounting of the sub-weeding rotor 23. it can.

The main weeding rotor 22 has an outer member (end plate 63) fixed to the outer end side of the support shaft 24, and the sub weeding rotor 23 has an inner member (end plate 63) superposed on the outer member (end plate 63). The engaging hole 64 may be formed in the outer member (end plate 63), and the engaging pin 70 may be fixed to the inner member (plate member 68).
According to this configuration, by providing the sub-weeding rotor 23 with the engagement pin 70, when the head 70a is passed through the insertion hole 66, the positional relationship between the head 70a and the insertion hole 66 can be easily visually confirmed. Therefore, the head portion 70a can be easily inserted into the insertion hole 66.

Further, a fixture 72 for fastening the outer member (end plate 63) and the inner member (plate member 68) without tools may be provided.
According to this structure, the rotation stop in the direction opposite to the mounting direction of the sub weeding rotor 23 with respect to the main weeding rotor 22 can be performed without a tool.
Further, the sub-weeding rotor 23 may rotate concentrically with the main weeding rotor 22 and may have diameters D3 and D4 smaller than the diameters D1 and D2 of the main weeding rotor 22.

With this configuration, when the weeding rotor 21 is attached to the weeding device 1 to weed the grass, the sub weeding rotor 23 can weed the grass above the lower end of the main weeding rotor 22. Thereby, for example, when weeding laterally of the ridge U1 on which the mulch film M1 is laid, there is a step 32 between the lower end of the main weeding rotor 22 and the lower end of the sub weeding rotor 23. Weeding can be performed up to the mulch film M1 without catching the hem Ma of the mulch film M1. Further, the weeding rotor 21 having a step between the lower end of the main weeding rotor 22 and the lower end of the sub weeding rotor 23 can be easily formed.

Although one embodiment of the present invention has been described above, it should be considered that the embodiment disclosed this time is an exemplification in all respects and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

8 Machine frame 18 Rotating shaft 21 Weeding rotor 22 Main weeding rotor 23 Sub weeding rotor 23L First sub rotor 23R Second sub rotor 24 Spindle 25 Grass cutting blade (first grass cutting blade)
31 Cutting blade (2nd cutting blade)
64 engaging hole 63 outer member (end plate)
63a Wall part (central part)
63c Regulating part 64a End of engaging groove (first groove) 64b End of engaging groove (second groove) 66 Insertion hole 67 Engaging groove 67a First groove 67b Second groove 68 Inner member (plate member)
70 Engagement Pin 70a Head 70b Shaft 72 Fixture D1 Diameter of main weeding rotor (first main rotor) D2 Diameter of main weeding rotor (second main rotor) D3 Diameter of sub weeding rotor (first subrotor) D4 Sub Diameter of weeding rotor (first sub-rotor) E1 Circumferential direction F1 Circumference F2 Circumference G1 Ground G2 Grass M1 Multi film Ma Bottom U1 Ridge X1 1st direction X2 2nd direction Y1 Shaft center Y2 Shaft center

Claims (14)

Machine frame,
A rotation shaft rotatably supported by the machine frame,
A weeding rotor having a main weeding rotor that rotates with the rotation shaft and weeds grass on the ground, and a sub-weeding rotor that is arranged side by side with the main weeding rotor in the axial direction of the rotation shaft;
An engagement hole provided in one of the main weeding rotor and the sub-weeding rotor, having an insertion hole and an engagement groove extending in the circumferential direction of the weeding rotor from the insertion hole,
An engagement pin that is provided on the other of the main weeding rotor and the sub-weeding rotor, and has a shaft portion and a head portion that is provided at an end portion of the shaft portion and that can be inserted into and removed from the insertion hole,
Equipped with
The shaft portion is located in the insertion hole with the head portion passing through the insertion hole, and in the state, the sub-weeding rotor is rotated with respect to the main weeding rotor to form the engagement groove. Insert and contact the end of the engaging groove,
The wall portion forming the engagement hole is configured such that the head portion is engaged with the shaft portion in contact with the end portion of the engagement groove and the sub weeding rotor is separated from the main weeding rotor. A weeding device having a regulating part for regulating. A plurality of the engagement holes are formed on a circumference centered on the axis of the rotating shaft,
The engagement groove of each engagement hole is formed in an arc shape around the axis of the rotating shaft,
The weeding device according to claim 1, wherein a plurality of the engagement pins are provided on a circumference having the same diameter as the circumference centered on the axis of the rotation shaft and centered on the axis of the rotation shaft. .. The rotating shaft is selectively rotatable in a first direction and a second direction opposite to the first direction,
The engagement groove includes a first groove extending from the insertion hole in a direction opposite to the first direction, and a second groove extending from the insertion hole in a direction opposite to the second direction. The weeding apparatus described in 1. The main weeding rotor has a support shaft arranged concentrically with the rotation shaft and integrally rotating with the rotation shaft, and an outer member fixed to an outer end side of the support shaft,
The sub-weeding rotor has an inner member superposed on the outer member,
The engagement hole is formed in the outer member,
The weeding device according to claim 1, wherein the engagement pin is fixed to the inner member. The weeding apparatus according to claim 4, further comprising a fixture that fastens the outer member and the inner member without tools. The weeding device according to any one of claims 1 to 5, wherein the sub-weeding rotor rotates concentrically with the main weeding rotor and has a diameter smaller than a diameter of the main weeding rotor. The sub-weeding rotor is capable of weeding above the hem portion in a state where the main weeding rotor is located on the side of the hem portion which is the end portion in the width direction of the mulch film laid on the ridge. The weeding apparatus according to any one of 1 to 6. 8. The sub-weeding rotor includes a first sub-rotor provided on one side of the main weeding rotor and a second sub-rotor provided on the other side of the main weeding rotor. The weeding apparatus as described in the item. A main weeding rotor having a support shaft and a grass cutting blade provided around the support shaft;
A sub having a grass cutting blade which is arranged side by side with the main weeding rotor in the axial direction of the support shaft and which is different from the grass cutting blade and which is provided around an extension line of the shaft center of the support shaft. A weeding rotor,
An engagement hole that is provided in one of the main weeding rotor and the sub-weeding rotor, and has an insertion hole and an engagement groove that extends from the insertion hole in the circumferential direction centered on the spindle.
An engagement pin that is provided on the other of the main weeding rotor and the sub-weeding rotor, and has a shaft portion and a head portion that is provided at an end portion of the shaft portion and that can be inserted into and removed from the insertion hole,
Equipped with
The shaft portion is located in the insertion hole with the head portion passing through the insertion hole, and in the state, the sub-weeding rotor is rotated with respect to the main weeding rotor to form the engagement groove. Insert and contact the end of the engaging groove,
The wall portion forming the engagement hole is configured such that the head portion is engaged with the shaft portion in contact with the end portion of the engagement groove and the sub weeding rotor is separated from the main weeding rotor. A weeding rotor having a regulating section for regulating. A plurality of the engagement holes are formed on the circumference around the axis of the support shaft,
The engagement groove of each engagement hole is formed in an arc shape around the axis of the support shaft,
The weeding rotor according to claim 9, wherein a plurality of the engagement pins are provided on a circumference having the same diameter as the circumference centered on the shaft center of the support shaft and centered on the shaft center of the support shaft. .. The main weeding rotor is selectively rotatable in a first direction and a second direction opposite to the first direction,
11. The engagement groove includes a first groove extending from the insertion hole in a direction opposite to the first direction, and a second groove extending from the insertion hole in a direction opposite to the second direction. The weeding rotor described in 1. The main weeding rotor has an outer member fixed to the outer end side of the support shaft,
The sub-weeding rotor has an inner member superposed on the outer member,
The engagement hole is formed in the outer member,
The weeding rotor according to claim 9, wherein the engagement pin is fixed to the inner member. The weeding rotor according to claim 12, further comprising a fixture that fastens the outer member and the inner member without tools. The weeding rotor according to any one of claims 9 to 13, wherein the sub weeding rotor rotates concentrically with the main weeding rotor and has a diameter smaller than a diameter of the main weeding rotor.

Images