JP2016103989A - Paddy field working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently transmit reciprocal oscillation of a drive part to both first and second one-way clutches.SOLUTION: A transmission shaft 22 drives an oscillation member 61 so as to reciprocally oscillate in a predetermined angle A1 range, thereby a drive part 46 is driven so as to reciprocally oscillate through a connection member 49. Connection position change means 61a, 62 are arranged which freely change a connection position of the oscillation member 61 to the transmission shaft 22 along a rotation direction of the transmission shaft 22. Forward oscillation of the drive part 46 allows the first one-way clutch 41 to be driven to rotate in a predetermined direction B1 to drive a drive shaft 37 to rotate in the predetermined direction B1. Backward oscillation of the drive part 46 allows the second one-way clutch 42 to be driven to rotate in the predetermined direction B1 to drive the drive shaft 37 to rotate in the predetermined direction B1.SELECTED DRAWING: Figure 15

Description

  The present invention relates to a paddy field work machine provided with a storage part for storing powdery seed pods, fertilizers and chemicals, liquid fertilizers and chemicals (which corresponds to agricultural materials above), and a feeding part for feeding out agricultural materials in the storage parts. The present invention relates to the drive structure of the feeding section.

As an example of the paddy field machine as described above, as disclosed in Patent Document 1, there is a riding type rice transplanter provided with a fertilizer application device (a storage unit and a feeding unit) that supplies granular fertilizer to a rice field.
In Patent Document 1, a drive shaft (21 in FIGS. 7 and 14 of Patent Document 1) for driving the feeding portion is provided, and the first one-way clutch (38 in FIGS. 7 and 14 in Patent Document 1) is provided on the drive shaft. ) And a second one-way clutch (42 in FIG. 14 of Patent Document 1). A drive unit (40 in FIG. 7 of Patent Document 1) that reciprocally swings up and down within a predetermined range when power is transmitted is provided, and the drive unit is connected to the first one-way clutch.

  A relay member (44 in FIGS. 7 and 14 of Patent Document 1) is provided separately from the first and second one-way clutches, and a rod (FIG. 7 in Patent Document 1) extends between the first one-way clutch and the relay member. And 45) in FIG. 14 are connected, and a rod (46 in FIG. 7 and FIG. 14 in FIG. 14) is connected across the second one-way clutch and the relay member.

Accordingly, in FIG. 7 of Patent Document 1, when the drive unit swings upward, the first one-way clutch is rotationally driven counterclockwise on the paper surface, and the drive shaft is rotationally driven counterclockwise on the paper surface by the first one-way clutch. Is done.
At the same time, the rotation of the first one-way clutch is transmitted to the second one-way clutch via the two rods and the relay member, and the second one-way clutch is rotated in the clockwise direction on the paper. In this case, only the second one-way clutch is idled, and the drive shaft is not rotationally driven by the second one-way clutch.

Next, when the drive unit swings downward, the first one-way clutch is rotationally driven in the clockwise direction on the paper. In this case, only the first one-way clutch is idled, and the drive shaft is not rotationally driven by the first one-way clutch.
At the same time, the rotation of the first one-way clutch is transmitted to the second one-way clutch via the two rods and the relay member, and the second one-way clutch is driven to rotate counterclockwise on the paper surface. Is driven to rotate counterclockwise on the page.

  As described above, according to the structure of Patent Document 1, by providing the drive shaft with the first and second one-way clutches with respect to the drive unit that reciprocally swings, the forward swinging of the drive unit is performed via the first one-way clutch. Is transmitted to the drive shaft, the drive shaft is rotationally driven by the first one-way clutch, and the backward swing of the drive unit is transmitted to the drive shaft via the second one-way clutch, and the drive shaft is rotated by the second one-way clutch. Driven.

Japanese Patent Laid-Open No. 2002-95312 (see FIGS. 6, 7, 13, and 14)

In the structure of Patent Document 1, the forward swing of the drive unit is directly transmitted to the first one-way clutch, whereas the backward swing of the drive unit is referred to as the first one-way clutch, the rod, the relay member, and the rod. Thus, it is transmitted to the second one-way clutch through many members.
As a result, the transmission system that transmits the backward swing of the drive unit to the second one-way clutch has a disadvantageous structure in terms of transmission efficiency.

  In the paddy field machine according to the present invention, when the reciprocating swing of the drive unit is transmitted to the first and second one-way clutches and the drive shaft of the feeding unit is rotationally driven, the reciprocating swing of the drive unit is the first. It is intended to be configured so as to be efficiently transmitted to both the first and second one-way clutches.

[I]
(Constitution)
The first feature of the present invention resides in the following configuration in a paddy field work machine.
A transmission shaft that is driven to reciprocately rotate within a predetermined angle range by the power of the engine, a swinging member is connected to the transmission shaft, and a linkage member spans between the swinging supported drive unit and the swinging member. Connect
The drive unit is configured to be reciprocally oscillated and driven via the linkage member when the oscillating member is reciprocally oscillated and driven within the range of the predetermined angle by the transmission shaft.
A connection position changing means capable of changing the connection position of the swing member with respect to the transmission shaft along the rotation direction of the transmission shaft;
A storage unit for storing agricultural material; a supply unit for supplying agricultural material in the storage unit; and a drive shaft for driving the supply unit,
A first one-way clutch and a second one-way clutch are provided on the drive shaft, a first linkage member is connected across the drive unit and an arm of the first one-way clutch, and the drive unit and an arm of the second one-way clutch And connecting the second linkage member over
The first one-way clutch is rotationally driven in the predetermined direction and the second one-way clutch is rotationally driven in a direction opposite to the predetermined direction by the forward swing of the driving unit, and the first one-way clutch drives the driving The shaft is rotationally driven in the predetermined direction,
The first one-way clutch is rotationally driven in a direction opposite to the predetermined direction by the swinging of the drive section in the backward direction, and the second one-way clutch is rotationally driven in the predetermined direction, and the second one-way clutch drives the drive. The shaft is configured to be rotationally driven in the predetermined direction.

(Operation and effect of the invention)
[I] -1
According to the first feature of the present invention, when the drive shaft for driving the feeding portion is provided with the first and second one-way clutches and the drive unit is driven to swing back and forth, the drive portion and the arm of the first one-way clutch are provided. Are directly connected by the first linkage member, and the drive unit and the arm of the second one-way clutch are directly connected by the second linkage member.

  Thus, according to the first feature of the present invention, when the drive unit swings forward, the forward swing of the drive unit is transmitted to the first one-way clutch via the first linkage member, and is driven by the first one-way clutch. The shaft is driven to rotate in a predetermined direction. At the same time, the forward swing of the drive unit is transmitted to the second one-way clutch via the second linkage member, and the second one-way clutch is driven to rotate in the direction opposite to the predetermined direction. In contrast, the second one-way clutch runs idle.

Conversely, when the drive unit swings in the backward direction, the backward swing of the drive unit is transmitted to the second one-way clutch via the second linkage member, and the drive shaft is rotationally driven in a predetermined direction by the second one-way clutch. At the same time, the backward swing of the drive unit is transmitted to the first one-way clutch via the first linkage member, and the first one-way clutch is driven to rotate in the direction opposite to the predetermined direction. In contrast, the first one-way clutch idles.
As described above, according to the first feature of the present invention, both the forward swing and the backward swing of the drive unit are directly transmitted to the first and second one-way clutches. And the backward swing are efficiently transmitted to both the first and second one-way clutches.

[I] -2
According to the first aspect of the present invention, a transmission shaft that is reciprocally rotated within a predetermined angle range by the power of the engine is provided, and a swinging member is coupled to the transmission shaft so as to span the drive unit and the swinging member. The linking member is connected, and the drive member is reciprocally oscillated and driven via the linking member by the reciprocating oscillating drive of the oscillating member within a predetermined angle range by the transmission shaft.

In this case, according to the first feature of the present invention, the connecting position changing means is provided that can change the connecting position of the swinging member with respect to the transmission shaft along the rotation direction of the transmission shaft.
Thus, for example, even if an assembly error occurs in each part, the reciprocal swing range (trajectory) of the swinging member can be appropriately adjusted by changing the connecting position of the swinging member with respect to the transmission shaft along the rotation direction of the transmission shaft. The range (trajectory) of the reciprocating swing of the drive unit can be set to an appropriate position with respect to the first and second one-way clutches.

[II]
(Constitution)
The second feature of the present invention resides in the following configuration in the paddy field working machine of the first feature of the present invention.
The feeding part is arranged in the left-right direction, and the driving part is provided at the right or left end of the feeding part,
The transmission shaft is arranged in the left-right direction across the portion on the left and right center side of the feeding portion and the right or left end portion on the drive portion side in the feeding portion,
The end of the transmission shaft on the side of the drive unit is provided with the swing member and the coupling position changing means, and the linkage member is connected across the drive unit and the swing member.

(Operation and effect of the invention)
According to the second feature of the present invention, when the feeding portion is arranged in the left-right direction, the driving portion is provided at the right end portion (or left end portion) of the feeding portion, and the left and right center side portion of the feeding portion and the right end portion of the feeding portion ( (Or the left end), the transmission shaft is arranged in the left-right direction.
In the above structure, according to the second feature of the present invention, the rocking member and the coupling position changing means are provided at the end of the transmission shaft on the side of the driving unit, and the rocking member and the coupling position changing means are the feeding part. At the right end (or the left end).
As a result, when the operator performs work on the swing member and the connection position changing means, the swing member and the connection position change means are provided at the right end (or the left end) of the feeding portion. Is easier to do.

[III]
(Constitution)
The third feature of the present invention resides in the following configuration in the paddy field working machine of the second feature of the present invention.
An input member is connected to an end of the transmission shaft opposite to the drive unit,
A drive member that is driven to reciprocate up and down by the power of the engine is provided on the lower side of the feeding portion and connected to the input member,
The drive shaft is configured to be reciprocally driven by the drive member via the input member within a range of the predetermined angle,
The transmission shaft is provided at a height between an upper end portion and a lower end portion of the swing range of the input member in a side view.

(Operation and effect of the invention)
According to the third feature of the present invention, as described in the preceding item [II], the feeding portion is arranged in the left-right direction and spans the left and right center side portion of the feeding portion and the right end portion (left end portion) of the feeding portion. When the transmission shaft is arranged in the left-right direction, the input member is connected to the end of the transmission shaft opposite to the drive unit, and the drive member that is driven up and down by the power of the engine is placed below the feed unit. It is provided and connected to the input member. As a result, the transmission shaft is reciprocally driven by the drive member via the input member within a predetermined angle range.

In the above structure, according to the third feature of the present invention, the transmission shaft is provided at the height between the upper end portion and the lower end portion of the swing range of the input member in a side view. Even if the position of the transmission shaft varies up and down, the transmission shaft may be disengaged upward from the height of the upper end of the swing range of the input member, or may be disengaged downward from the height of the lower end. It becomes difficult.
Thus, for example, even if an assembly error occurs in each part and the position of the transmission shaft varies up and down, the power of the engine is transmitted to the transmission shaft via the drive member and the input member, and the transmission shaft is within a predetermined angle range. Appropriately reciprocatingly driven.

[IV]
(Constitution)
A fourth feature of the present invention resides in the following configuration in the paddy field working machine of the second or third feature of the present invention.
The aircraft is equipped with up and down right and left support columns, and a support frame is connected to the upper part of the support columns and arranged in the left-right direction, and the extension unit is connected to the support frame in the left-right direction. Place
The transmission shaft is provided below the support frame in a side view, and the transmission shaft is provided along the support frame in a rear view.

(Operation and effect of the invention)
According to the fourth feature of the present invention, as described in the preceding item [II], when the feeding portion is arranged in the left-right direction, the right and left struts are provided on the airframe and the support frame is provided on the top of the strut. By connecting and arranging in the left-right direction, and connecting the extension part to the support frame, the extension part is arranged in the left-right direction.
In the above structure, according to the fourth feature of the present invention, the transmission shaft is provided on the lower side of the support frame in a side view and the transmission shaft is provided along the support frame in a rear view. The shaft can be arranged compactly.

[V]
(Constitution)
The fifth feature of the present invention resides in the following configuration in the paddy field working machine of the fourth feature of the present invention.
A reinforcing member is connected across the right and left struts.

(Operation and effect of the invention)
According to the fifth feature of the present invention, as described in [IV] above, when the right and left struts facing up and down are provided in the fuselage to support the feeding portion, the right and left struts are spanned. By connecting the reinforcing members, the feeding portion can be supported with sufficient strength.

[VI]
(Constitution)
The sixth feature of the present invention resides in the following configuration in the paddy field working machine of the fifth feature of the present invention.
An input member is connected to a portion of the transmission shaft opposite to the drive unit, and the input member extends rearward from the transmission shaft,
A drive member that is driven to reciprocate up and down by the power of the engine is provided on the lower side of the feeding portion and connected to the input member,
The drive shaft is configured to be reciprocally driven by the drive member via the input member within a range of the predetermined angle,
The reinforcing member is connected across the front portions of the right and left struts.

(Operation and effect of the invention)
As described in the previous item [V], when the right and left struts facing up and down are provided on the fuselage to support the feeding part and the reinforcing member is connected across the right and left struts, it is described in the previous item [III]. The driving member is positioned in the vicinity of the reinforcing member.
According to the sixth aspect of the present invention, the input member to which the drive member is connected extends rearward from the transmission shaft, whereas the reinforcing member is connected across the front portions of the right and left struts. Since the drive member and the reinforcing member are configured to be separated in the front-rear direction, a state where the drive member interferes with the reinforcing member can be avoided.

[VII]
(Constitution)
According to a seventh aspect of the present invention, any one of the first to sixth paddy field machines according to the present invention is configured as follows.
A support member for swingably supporting the drive unit; and changing the position of the swing support point of the drive unit in the support member by changing the attitude of the support member,
Changing the rotation angle of the first one-way clutch in the predetermined direction by the forward swing of the drive unit, changing the rotation angle of the second one-way clutch in the predetermined direction by the backward swing of the drive unit, and Configure to change the feed amount of the feed section,
A display unit is provided along the direction of the posture change of the support member, and the support member and the display unit are collated so that the feeding amount of the feeding unit can be read.
The position of the display unit is configured to be changeable along the direction of the posture change of the support member.

(Operation and effect of the invention)
When configured as described in [I] above, according to the seventh feature of the present invention, the drive unit in the support member is provided with a support member that swingably supports the drive unit, and the posture of the support member is changed. By changing the position of the swing fulcrum, the feed amount of the feed portion is changed, and the feed amount of the feed portion can be set to a desired value in accordance with the state of the work site. .

According to the seventh aspect of the present invention, the display unit is provided along the direction of the posture change of the support member, and the amount of extension of the extension unit can be read by comparing the support member and the display unit. doing.
In this case, according to the seventh feature of the present invention, since the position of the display unit is configured to be freely changeable along the direction of the posture change of the support member, for example, an assembly error occurs in each unit, and the support member and the display unit Even if the positional relationship is slightly deviated, the positional relationship between the support member and the display unit can be corrected by changing the position of the display unit along the direction of the posture change of the support member.

[VIII]
(Constitution)
The eighth feature of the present invention resides in the following configuration in the paddy field working machine of the seventh feature of the present invention.
The support member is supported so as to be swingable around a support point, and a swing fulcrum of the drive unit is provided in a portion of the support member that is separated from the support point,
A posture setting member for determining the posture of the support member is connected to the portion of the support member opposite to the swing fulcrum of the drive unit from the support point, and the posture of the support member is changed by the posture setting member. It is configured to be freely changeable around the support point,
The length between the support point and the connecting portion of the posture setting member is set between 1.0 and 2.0 times the length between the support point and the swing fulcrum of the drive unit. doing.

(Operation and effect of the invention)
According to the eighth aspect of the present invention, as described in [VII] above, the support member that swingably supports the drive unit is provided, and the posture of the support member is changed to swing the drive unit in the support member. When configured to change the position of the fulcrum, the support member is swingably supported around the support point, and the drive member swing fulcrum is provided at a portion of the support member remote from the support point. The posture setting member that determines the posture of the support member is connected to the portion of the support member opposite to the swing fulcrum of the drive unit, and the posture of the support member is changed around the support point by the posture setting member doing.

In the above structure, according to the eighth feature of the present invention, in the support member, the length between the support point and the connection portion of the posture setting member is set to the length between the support point and the swing fulcrum of the drive unit. Since it is set between 1.0 times and 2.0 times, the support member is not unnecessarily long and is configured to be compact.
As described above, when the support member is configured in a compact manner, the display unit provided along the direction of the posture change of the support member can also be configured in a compact manner.

[IX]
(Constitution)
According to a ninth aspect of the present invention, any one of the paddy field work machines according to the first to eighth aspects of the present invention is configured as follows.
A connecting portion between the driving unit and the linking member is configured to be changeable along the radial direction of the reciprocating swing of the driving unit.

(Operation and effect of the invention)
As described in [I] -1 and 2 above, the linkage member is connected across the drive unit and the swing member, and the swing member is reciprocally swung within a predetermined angle range by the transmission shaft. According to the ninth feature of the present invention, when the drive unit is configured to be driven to reciprocate and swing via the linkage member, the connecting portion between the drive unit and the linkage member is connected to the reciprocating swing of the drive unit. It is configured to be changeable along the radial direction.

  Thus, according to the ninth aspect of the present invention, for example, in a state where the linkage member is connected to a position where the drive unit is located, the reciprocating swing of the drive unit is caused by the first and second linkage members via the first and second linkage members. 2 When the first and second linkage members are in an unnatural posture in a state where they are transmitted to the one-way clutch (for example, when the first and second linkage members pass near the dead point), A state in which the first and second linking members are in an unnatural posture (for example, first and second) by changing the movement trajectory of the first and second linking members by changing the connection portion with the linking member. State in which the linkage member passes near the dead point), and the reciprocating swing of the drive unit is stably transmitted to the first and second one-way clutches via the first and second linkage members. To be done It can be.

  Further, according to the ninth feature of the present invention, the predetermined angle at which the swinging member is driven to reciprocally swing by changing the connecting portion of the drive unit and the linking member along the radial direction of the reciprocating swing of the drive unit. The range in which the drive unit is driven to reciprocally swing can be changed with respect to the above range, and the feed amount of the feed unit can be changed.

It is a whole side view of a riding type rice transplanter. It is a whole top view of a riding type rice transplanter. It is a rear view of a fertilizer applicator. It is a side view of the vicinity of a body frame, a support member of a rear step, and a supply amount changing device. It is a side view of the vicinity of a body frame, a supporting member of a rear step, and a fertilizer application. It is a schematic plan view which shows the whole structure of a fertilizer application. It is a perspective view which shows the support member of a body frame and a rear step, a support | pillar and a support frame, a supply amount changing apparatus, etc. It is a side view of the vicinity of a fertilizer application device and a supply amount change device. It is a front view of the vicinity of a supply amount changing device. It is a vertical front view of the vicinity of a supply amount changing device. It is a cross-sectional plan view near the supply amount changing device. It is a disassembled perspective view of a supply amount change apparatus. It is a vertical side view of the vicinity of a drive rod, a transmission shaft, an arm of the transmission shaft, and a swing member. It is a cross-sectional top view of the vicinity of the arm of a transmission shaft, and a rocking | swiveling member. FIG. 4 is a side view of the supply amount changing device in a state where the rotation speed of the drive shaft (the feed amount of the feed portion) is set to the high speed side (multiple side) and the drive portion is located at one end of a predetermined angle. is there. FIG. 4 is a side view of the supply amount changing device in a state where the rotation speed of the drive shaft (the feed amount of the feed portion) is set to the high speed side (multiple side) and the drive portion is positioned at the other end of a predetermined angle. is there. In the side view of the supply amount changing device in a state where the rotational speed of the drive shaft (the feed amount of the feed portion) is set to the low speed side (small side) and the drive portion is located at one end of a predetermined angle is there. FIG. 6 is a side view of the supply amount changing device in a state where the rotational speed of the drive shaft (the feed amount of the feed portion) is set to the low speed side (small side) and the drive portion is located at the other end of the predetermined angle. is there. The rotational speed of the drive shaft (the feed amount of the feed portion) is set to a generally low speed (small state) (the second one-way clutch is not used), and the drive portion is positioned at one end of a predetermined angle. It is a side view of the supply amount change apparatus in the state which is carrying out. The rotational speed of the drive shaft (the feed amount of the feed portion) is set to a generally low speed (less state) (the second one-way clutch is not used), and the drive portion is positioned at the other end of the predetermined angle. It is a side view of the supply amount change apparatus in the state which is carrying out. It is a top view of a scale plate. In another embodiment of the invention, it is a side view of a supply amount changing device. In another embodiment of the invention, it is a side view of the supply amount changing device when the rotational speed of the drive shaft (the feed amount of the feed portion) is generally higher (a large state).

[1]
As shown in FIGS. 1 and 2, a link mechanism 3 that can swing up and down is provided at the rear of the machine body supported by the right and left front wheels 1 and the right and left rear wheels 2. A 6-planting type seedling planting device 5 is supported so as to be movable up and down, and a hydraulic cylinder 4 that drives the link mechanism 3 to move up and down is provided to constitute a riding type rice transplanter that is an example of a paddy field work machine. .

Next, the seedling planting device 5 will be described.
As shown in FIGS. 1 and 2, the seedling planting device 5 includes three transmission cases 6, a pair of rotation cases 7 that are rotatably supported at the rear of the transmission case 6, and both ends of the rotation cases 7. A pair of planting arms 8, a grounding float 9, a seedling platform 10 and the like are provided.

  As shown in FIGS. 1 and 2, the power of the engine 17 is driven by a hydrostatic continuously variable transmission for traveling (not shown), an inter-strain transmission (not shown), and planting. It is transmitted from the clutch (not shown) to the seedling planting device 5 through the PTO shaft 19. Thus, as the seedling platform 10 is driven to reciprocate laterally to the left and right, the rotary case 7 is rotationally driven, and the planting arms 8 alternately take out the seedlings from the lower part of the seedling platform 10 and put them on the rice field. Plant.

[2]
Next, the fertilizer application device 11 will be described.
As shown in FIGS. 1 and 2, a slightly higher rear step 33 is provided on the rear side of the driver seat 31 with respect to the floor 32 below the front of the driver seat 31. As shown in FIGS. 1, 2, 4 and 5, right and left support members 30 are connected to the rear portions of the right and left fuselage frames 28, and the driver seat 31 and the rear step 33 are the right and left support members. 30.

  As shown in FIGS. 1, 3, 4, 5, and 7, right and left struts 38 that are L-shaped in a side view are connected to the rear part of the upper part of the right and left support members 30, The rear side extends upward, and a reinforcing member 39 is connected across the front side portions of the right and left support columns 38. A square pipe-shaped support frame 20 is connected to the upper portions of the right and left support columns 38, and the support frame 20 is disposed in the left-right direction so as to be positioned above the rear step 33 on the rear side of the driver seat 31. Yes.

  As shown in FIGS. 1, 2, 3, and 5, the four feeding portions 13 are connected to the front surface portion of the support frame 20, and the four feeding portions 13 are arranged in the left-right direction along the support frame 20. ing. A hopper 12 (corresponding to a storage part) for storing powdered fertilizer (corresponding to agricultural material) is connected to the upper part of the feeding part 13, and a blower 14 is provided at the left end part of the fertilizer application apparatus 11. Grooves 15 are connected to the ground float 9, and six groovers 15 are provided, and six hoses 16 are connected across the feeding part 13 and the groover 15.

As described above, the fertilizer application device 11 is configured by the hopper 12, the feeding portion 13, the blower 14, the groove producing device 15, the hose 16, and the like.
As shown in FIGS. 1 and 2, inverted U-shaped handrails 34 are provided so as to be positioned at the right and left end portions of the rear step 33, and the front frame 35 extends over the right and left handrails 34. The rear frame 36 is connected, and the hopper 12 is positioned between the front and rear frames 35 and 36.

  As shown in FIG. 6, the blower 14 is configured to be driven by an electric motor 25, a branch portion 26 is connected to the blower 14, and a shutter 26 a for switching operation of the blower 14 is connected to the branch portion 26. Is provided. As shown in FIGS. 6 and 8, a supply duct 27 is connected across the branch portion 26 and the front portion of the feeding portion 13, and the suction portion 13 a of the feeding portion 13 is inserted into the supply duct 27. A discharge part 13b and a shutter (not shown) that opens and closes the discharge part 13b are provided in the upper part of the front part of the supply part 13, and a discharge duct 29 extending from the branch part 26 is provided as a discharge port 13b of the supply part 13. Connected.

The state shown in FIG. 6 is a state in which the entrance of the discharge duct 29 is blocked by the shutter 26a of the branching portion 26, and is a working state in which the air blown from the blower 14 is supplied to the supply duct 27 (the discharge portion 13b of the feeding portion 13). The shutter is operated to the closed position).
In the working state, the air blown from the blower 14 is supplied to the feeding unit 13 via the supply duct 27, and when the fertilizer is fed from the hopper 12 by a predetermined amount by the feeding unit 13, the fertilizer passes through the hose 16 by the blower 14 blowing. It is supplied to the groove producing device 15 and is supplied to the rice field through the groove producing device 15.

When the fertilizer remaining in the hopper 12 is collected after the planting operation is completed, the inlet of the supply duct 27 is closed by the shutter 26a of the branching portion 26 shown in FIG. 6 and the air blown from the blower 14 is supplied to the discharge duct 29. The discharge state is set by operating the shutter of the discharge unit 13b of the feeding unit 13 to the open position.
Thereby, the fertilizer of the hopper 12 comes out from the discharge port 13b of the feeding portion 13 to the discharge duct 29, and the air blown from the blower 14 is supplied to the discharge duct 29, and the fertilizer output to the discharge duct 29 is sent to the discharge duct 29. Is discharged from the discharge port 29a.

[3]
Next, in the transmission system of the fertilizer application apparatus 11, the structure from the PTO shaft 21 to the transmission shaft 22 will be described.
As shown in FIG. 1, a PTO shaft 21 extends rearward from a transmission case 18 along a body frame 28, and a hydrostatic continuously variable transmission (not shown) for driving the engine 17 is used. And from a fertilizer clutch (not shown) to the PTO shaft 21. As shown in FIGS. 3, 4, 5, and 7, a bracket 48 is connected downward to the left and right central portions and the right end of the support frame 20, and the transmission shaft 22 is rotatably supported across the bracket 48. Yes.

  As shown in FIGS. 3, 4, 5, 6, and 7, an arm 22a (corresponding to an input member) is provided at the left end of the transmission shaft 22 (the end opposite to the drive unit 46 (see [4] described later)). ) Are extended to the rear side, and an arm 21 a is connected to the rear end portion of the PTO shaft 21. A linkage rod 23 (corresponding to a drive member) is connected across the arm 21a of the PTO shaft 21 and the arm 22a of the transmission shaft 22, and the drive rod 23 is located below the feeding portion 13 in a side view. (See FIGS. 4 and 5).

  With the above structure, when the PTO shaft 21 is rotationally driven, the drive rod 23 is reciprocated up and down by the arm 21a of the PTO shaft 21, and the drive rod 23 transmits the power via the arm 22a of the transmission shaft 22. The shaft 22 is driven to reciprocate within a range of a predetermined angle A1.

  As shown in FIGS. 3, 6, and 7, the transmission shaft 22 extends to the left and right across the central portion on the left and right sides of the four feeding portions 13 and the right end portion on the drive portion 46 side of the four feeding portions 13. The electric shaft 22 is provided below the support frame 20 in a side view (see FIGS. 4 and 5), and the transmission shaft 22 is provided along the support frame 20 in a rear view. (See FIGS. 3 and 7).

  More specifically, as shown in FIGS. 5 and 13, when a virtual line L <b> 1 extending vertically downward from the rear surface portion 20 a of the support frame 20 is set in the side view, the rear side of the transmission shaft 22 is set. The portion (the left side portion of FIG. 5) is in contact with the virtual line L1. Alternatively, the imaginary line L1 passes up and down between the center of the transmission shaft 22 and the rear side portion (the left side portion in FIG. 5). Alternatively, in a plan view, the portion of the transmission shaft 22 that extends over 2/3 of the diameter and the support frame 20 overlap each other.

  As shown in FIGS. 3 and 7, the drive rod 23 is positioned between the right and left columns 38 in the rear view, and the drive rod 23 is a reinforcing member in the side view as shown in FIGS. 4 and 5. 39 is located on the rear side (the left side in FIG. 4 and FIG. 5) (the reinforcing member 39 is located on the front side of the drive rod 23 (the right side in FIG. 4 and FIG. 5)).

  In the above state, as shown in FIGS. 4 and 5, the arm 22a of the transmission shaft 22 extends from the transmission shaft 22 to the rear side (the left side in FIG. 4 and FIG. 5), and the reinforcing member 39 moves to the right and left. As a result, the drive rod 23 and the reinforcing member 39 are separated in the front-rear direction (the left-right direction in FIG. 4 and FIG. 5). Therefore, the drive rod 23 does not interfere with the reinforcing member 39.

As shown in FIGS. 4, 5, and 13, when the PTO shaft 21 is rotationally driven and the drive rod 23 is reciprocated up and down by the arm 21 a of the PTO shaft 21, the arm 22 a of the transmission shaft 22 has a predetermined angle A <b> 1. It is driven to swing back and forth within the range.
In this case, the upper end portion Q1 of the swing range of the arm 22a of the transmission shaft 22 (the upper limit position of the tip portion of the arm 22a of the transmission shaft 22) and the lower end portion Q2 of the swing range of the arm 22a of the transmission shaft 22 (transmission shaft). The transmission shaft 22 is provided (positioned) at a height between the upper end of the arm 22a and the lower end position of the arm 22a.

With the above structure, as shown in FIGS. 4, 5, and 13, for example, even if an assembly error occurs in each part and the position of the transmission shaft 22 (feeding portion 13) varies up and down, the transmission shaft 22 is separated from the upper end portion Q <b> 1. It is difficult to cause a state where the upper side is detached or the lower end part Q2 is detached downward.
In this case, as shown in FIGS. 3, 4, 5, and 7, the drive rod 23 is provided with a turnbuckle portion 23a, and the drive rod 23 is configured to be adjustable in length by the turnbuckle portion 23a. Therefore, even if the transmission shaft 22 is disengaged upward from the upper end portion Q1 or deviated from the lower end portion Q2, the length of the drive rod 23 is adjusted so that the transmission shaft 22 is connected to the upper end portion Q1 and the lower end portion. It can return to the state located in the height between Q2.

[4]
Next, the structure from the transmission shaft 22 to the supply amount changing device 24 and the drive shaft 37 in the transmission system of the fertilizer application device 11 will be described.
As shown in FIGS. 1, 2, and 3, a supply amount changing device 24 is provided at the right end portion of the fertilizer application device 11 (the right end portion of the right end feeding portion 13), and the right end portion of the transmission shaft 22 is the supply amount changing device. 24. As shown in FIGS. 3, 5, and 6, brackets 60 are downwardly connected to a plurality of locations of the support frame 20, and have a hexagonal cross section along the left and right directions of the lower side of the support frame 20 and the rear portion of the feeding portion 13. The drive shaft 37 is rotatably supported, and the right end portion of the drive shaft 37 is connected to the supply amount changing device 24.

As shown in FIGS. 3 and 6, a feeding roll (not shown) that feeds the fertilizer by a predetermined amount with rotation is built in the feeding section 13, and an input gear 13 c connected to the feeding roll is fed to the feeding section 13. Is provided on the left lateral side.
A drive gear 37 a is attached to the drive shaft 37 so as to be relatively rotatable, and the drive gear 37 a is engaged with the input gear 13 c of the feeding portion 13. A shift member 37b is attached to the drive shaft 37 so as to be integrally rotatable and slidable, and the shift member 37b is configured to be slidable to a transmission position where the shift member 37b is engaged with the drive gear 37a and to a blocking position separated from the drive gear 37a. 37a and the shift member 37b constitute a minority clutch of the fertilizer application apparatus 11.

  With the above structure, as shown in the preceding item [3] and FIGS. 4, 5 and 6, when the PTO shaft 21 is rotationally driven, the drive rod 23 is reciprocally driven up and down by the arm 21 a of the PTO shaft 21. 23, the transmission shaft 22 is reciprocatingly driven within a range of a predetermined angle A <b> 1 via the arm 22 a of the transmission shaft 22, and the reciprocating rotation of the transmission shaft 22 is transmitted to the supply amount changing device 24.

  As shown in FIG. 6, the rotational speed of the drive shaft 37 is changed in the supply amount changing device 24, and the power of the drive shaft 37 is transmitted from the drive gear 37 a to the input gear 13 c of the feed portion 13, The fertilizer is fed from the feeding unit 13 by being driven to rotate. In this case, by moving the shift member 37b of the drive shaft 37 away from the drive gear 37a (by operating the minority clutch in the disengaged state), it is possible to stop the desired feeding portion 13 (feeding roll).

As shown in FIGS. 6, 15, and 16, in the supply amount changing device 24, when the transmission shaft 22 is driven to reciprocate within a predetermined angle A <b> 1, the reciprocating rotation of the transmission shaft 22 is transmitted to the drive unit 46. The driving unit 46 is driven to swing back and forth. The forward swing of the drive unit 46 is transmitted to the drive shaft 37 via the first one-way clutch 41, and the drive shaft 37 is rotationally driven in a predetermined direction B1. The backward swing of the drive unit 46 is transmitted to the drive shaft 37 via the second one-way clutch 42, and the drive shaft 37 is rotationally driven in the predetermined direction B1.
In this case, by changing the attitude of the drive unit 46 and changing the transmission state of the reciprocating swing from the drive unit 46 to the first and second one-way clutches 41, 42, the rotational speed of the drive shaft 37 (feeding unit) 13) is changed.

[5]
Next, the structure of the supply amount changing device 24 will be described.
As shown in FIGS. 3, 7, 8, 9, 10, and 12, a cover member 40 configured by bending a plate material into a U-shaped cross section is provided, and the cover member 40 is connected to the right end portion of the support frame 20. The front part and the rear part of the cover member 40 are open. As shown in FIGS. 4, 8, 9, 10, and 12, a support member 47 is supported around the horizontal axis P <b> 1 (corresponding to a support point) on the inner surface of the right wall portion 40 a of the cover member 40 so that the posture can be changed. In addition, a diamond-shaped drive unit 46 is swingably supported around the horizontal axis P2 (corresponding to the swing fulcrum) of the boss 47a below the support member 47 in a side view.

  As shown in FIGS. 12, 13, and 14, an arm 22 b is connected to the right end portion of the transmission shaft 22 by welding, and a swing member 61 is fitted on the right end portion of the transmission shaft 22 so as to be relatively rotatable. Two elongated holes 61a (corresponding to connection position changing means) are opened in the swing member 61, and two female screw portions 22c are connected to the arm portion 22b of the transmission shaft 22, and a bolt 62 (connection position). The swinging member 61 is connected to the transmission shaft 22 by passing through the elongated hole 61a of the swinging member 61 and tightening the female screw portion 22c of the arm 22b of the transmission shaft 22.

Accordingly, as shown in FIGS. 13 and 14, the coupling position of the swing member 61 with respect to the transmission shaft 22 can be changed along the rotation direction of the transmission shaft 22 in the range of the long hole 61 a of the swing member 61. (This corresponds to a state in which the swinging member 61 and the coupling position changing means 61a are provided at the end of the transmission shaft 22 on the drive unit 46 side).
As shown in FIGS. 9, 10, 11, 12, and 15, the drive portion 46 is provided with a boss portion 46 a, and the linkage member 49 is pinned across the swing member 61 and the boss portion 46 a of the drive portion 46. 63 is connected.

As shown in FIGS. 6, 9, 10, 11, 12, and 15, the first one-way clutch 41 is attached to the right end portion of the drive shaft 37, and the second one-way clutch 42 is disposed on the right side of the first one-way clutch 41. The third one-way clutch 43 is attached to the right side of the second one-way clutch 42. The arm 43a of the third one-way clutch 43 is connected to the bracket 20b of the support frame 20, and the third one-way clutch 43 does not rotate.
In this case, the first, second, and third one-way clutches 41, 42, and 43 allow the drive shaft 37 to rotate in a predetermined direction B1 (see FIG. 15) and are opposite to the predetermined direction B1 of the drive shaft 37. The function to prevent the rotation of.

  As shown in FIGS. 6, 11, 12, and 15, the arm 41 a of the first one-way clutch 41 extends obliquely forward and upward, and the arm 42 a of the second one-way clutch 42 extends obliquely forward and downward. A flat plate-like first link member 51 is connected by a pin 64 across the boss portion 46 b of the drive portion 46 and the boss portion 41 b of the arm 41 a of the first one-way clutch 41. A round bar-like second linkage member 52 is connected by a pin 65 across the boss portion 46 c of the drive portion 46 and the boss portion 42 b of the arm 42 a of the second one-way clutch 42.

  In this case, as shown in FIGS. 10 and 11, the drive shaft 37 and the horizontal axis P2 (the boss portion 47a of the support member 47) are configured to be parallel to each other. In the drive unit 46, the bosses 46b and 46c are in opposite directions (see FIGS. 10 and 11), and are provided in the drive unit 46 in a state of being close to each other in a side view (see FIG. 15). .

[6]
Next, transmission from the transmission shaft 22 to the drive shaft 37 in the supply amount changing device 24 will be described.
12 and 15, when the transmission shaft 22 is driven to reciprocate within a predetermined angle A1 range as described in [3] above (the arm 22b and the swinging member 61 of the transmission shaft 22 are within a predetermined angle A1 range). The drive unit 46 is oscillated and oscillated within a range of a predetermined angle A2 corresponding to the predetermined angle A1. In this case, the predetermined angle A1 is a constant value.

  The state shown in FIG. 15 is a state in which the drive unit 46 is located at one end A21 of the predetermined angle A2, and one end of the rotation angle A3 at which the first one-way clutch 41 (arm 41a) reciprocally swings. This is a state where the second one-way clutch 42 (arm 42a) is located at one end A41 of the rotation angle A4 where the second one-way clutch 42 (arm 42a) reciprocally swings.

  As shown in FIG. 15 to FIG. 16, when the drive unit 46 swings forward from one end A 21 of the predetermined angle A 2 to the other end A 22, the forward swing of the drive unit 46 passes through the first linkage member 51. Is transmitted to the first one-way clutch 41 (arm 41a), and the first one-way clutch 41 (arm 41a) is rotationally driven by the rotation angle A3 in the predetermined direction B1, and the other end from the one end A31 of the rotation angle A3. Part A32 is reached, and the drive shaft 37 is rotationally driven in the predetermined direction B1 by the first one-way clutch 41 (arm 41a).

At the same time, as shown in FIGS. 15 to 16, the forward swing of the drive unit 46 is transmitted to the second one-way clutch 42 (arm 42a) via the second linkage member 52, and the second one-way clutch 42 (arm 42a). ) Is rotated by a rotation angle A4 in a direction opposite to the predetermined direction B1, and reaches the other end A42 from one end A41 of the rotation angle A4.
As described above, the second one-way clutch 42 (arm 42 a) is rotationally driven in the direction opposite to the predetermined direction B 1, but the second one-way clutch 42 (arm 42 a) rotates idly with respect to the drive shaft 37.

  As shown in FIGS. 16 to 15, when the drive unit 46 swings in the backward direction from the other end A 22 of the predetermined angle A 2 to the one end A 21, the backward swing of the drive unit 46 is performed via the second linkage member 52. Is transmitted to the second one-way clutch 42 (arm 42a), and the second one-way clutch 42 (arm 42a) is driven to rotate in the predetermined direction B1 by the rotation angle A4, and the other end A42 of the rotation angle A4 is connected to one end. Part A41 is reached, and the drive shaft 37 is rotationally driven in the predetermined direction B1 by the second one-way clutch 42 (arm 42a).

At the same time, as shown in FIGS. 16 to 15, the backward swing of the drive unit 46 is transmitted to the first one-way clutch 41 (arm 41 a) via the first linkage member 51, and the first one-way clutch 41 (arm 41 a). ) Is rotated by a rotation angle A3 in a direction opposite to the predetermined direction B1, and reaches one end A31 from the other end A32 of the rotation angle A3.
Thus, the first one-way clutch 41 (arm 41a) is rotationally driven in the direction opposite to the predetermined direction B1, but the first one-way clutch 41 (arm 41a) rotates idly with respect to the drive shaft 37.

  As described above, both the forward swing and the backward swing of the drive unit 46 are directly transmitted to the first and second one-way clutches 41 and 42, and the forward swing and the backward swing of the drive unit 46 are transmitted. Both are efficiently transmitted to both the first and second one-way clutches 41 and 42.

  In a state where the drive unit 46 swings back and forth, as shown in FIGS. 12, 15 and 16, the drive unit 46 reaches the other end A22 of the predetermined angle A2 and returns to the one end A21 in the reverse direction. When swinging is started, when the drive unit 46 starts swinging in the backward direction, the drive shaft 37 rotates with the first one-way clutch 41, and the drive shaft 37 is slightly rotated in a direction opposite to the predetermined direction B1. Even if this is attempted, this state is blocked by the third one-way clutch 43.

  As shown in FIGS. 12, 15, and 16 as described above, when the drive unit 46 reaches one end A21 at a predetermined angle A2 and starts swinging the forward path to the other end A22 in the opposite direction. Even when the drive unit 46 starts to swing forward, the drive shaft 37 rotates with the second one-way clutch 42 and the drive shaft 37 is slightly rotated in the direction opposite to the predetermined direction B1. The state is blocked by the third one-way clutch 43.

  As shown in FIGS. 8 and 9, a boss portion 40 g that opens outward is connected to the inner surface of the right wall portion 40 a of the cover member 40, and the clamp member 55 is connected to the outer surface of the right wall portion 40 a of the cover member 40. Is attached. A crank-like manual handle 56 is provided in a front view, and the manual handle 56 includes a handle portion 56a having an inverted L shape in a front view and a boss portion 56b having a hexagonal hole at an end portion. Has been.

As shown in FIGS. 8 and 9, the boss portion 56 b of the manual handle 56 is inserted into the boss portion 40 g of the cover member 40, and the handle portion 56 a of the manual handle 56 is held by the clamp member 55. Is attached to the cover member 40.
When the drive shaft 37 is rotationally driven in a state where the engine 17 is stopped, the manual handle 56 is removed from the cover member 40, and the hexagonal hole of the boss portion 56 b of the manual handle 56 is inserted into the right end portion of the drive shaft 37. The handle 56 is attached to the drive shaft 37, and the drive shaft 37 can be rotationally driven in the predetermined direction B1 by the manual handle 56.

[7]
Next, by changing the attitude of the drive unit 46 in the supply amount changing device 24 and changing the transmission state of the reciprocating swing from the drive unit 46 to the first and second one-way clutches 41, 42, A structure for changing the rotation speed (the feeding amount of the feeding unit 13) will be described.

  As shown in FIGS. 10, 12, and 15, a boss portion 40 d is connected to the inner surface of the right wall portion 40 a of the cover member 40, and an opening portion 40 e is formed in the left wall portion 40 b of the cover member 40. A vertically long guide hole 40 f is formed in the upper wall portion 40 c of 40.

  As shown in FIGS. 10, 12, and 15, a scale plate 58 (corresponding to a display portion) made of a metal plate is connected to the upper wall portion 40 c of the cover member 40 by a bolt 59. A vertically long guide hole 58 c is formed in the scale plate 58 so as to be located at the same position as the guide hole 40 f of the cover member 40, and the index portion 47 c at the upper end portion of the support member 47 is a guide hole 58 c of the scale plate 58. (Guide hole 40f of cover member 40)

As shown in FIGS. 12 and 15, a boss member 44 is provided, and the boss member 44 is provided with a lateral support shaft 44a and a ring-shaped spring receiver 44b. The support shaft 44 a of the boss member 44 is inserted into the boss portion 40 d of the cover member 40, the retaining ring 45 is attached to the end of the support shaft 44 a of the boss member 44, and the support shaft 44 a of the boss member 44 is the cover member 40. The boss portion 40d is rotatably supported.
In this case, as shown in FIGS. 12 and 15, the boss member 44 is inserted into the cover member 40 from the opening 40 e of the cover member 40, and the support shaft 44 a of the boss member 44 is connected to the boss portion 40 d of the cover member 40. insert.

  As shown in FIGS. 10, 12, and 15, an operating shaft 50 (corresponding to a posture setting member) having a screw portion 50a on the outer peripheral portion is supported by a boss member 44 so as to be rotatable around its own horizontal axis P3. A compressed spring 53 is attached between the ring member 50 b provided at the rear end of the operation shaft 50 and the spring receiver 44 b of the boss member 44. The operation shaft 50 is lightly held so as not to rotate freely due to friction between the ring member 50 b of the operation shaft 50 and the spring 53, and is manually operated by a handle 54 provided at the front end of the operation shaft 50. The operation shaft 50 can be rotated and operated against the frictional force of the spring 53.

  As shown in FIGS. 10, 12, and 15, a boss portion 47 b is connected to the upper portion of the support member 47, and the screw member 57 is rotatably supported by the boss portion 47 b. A screw hole having a screw part formed on the inner surface is opened in the screw member 57, and the screw part 50 a of the operation shaft 50 is inserted into the screw hole of the screw member 57. The support member 47 is supported by the operation shaft 50 and the screw member 57. The attitude is determined.

  As illustrated in FIGS. 15 and 17, the attitude of the support member 47 is changed by rotating the operation shaft 50 and changing the position of the screw member 57 on the operation shaft 50 along the operation shaft 50. By changing the attitude of the drive unit 46 (the position of the horizontal axis P2 of the support member 47) and changing the transmission state of the reciprocating swing from the drive unit 46 to the first and second one-way clutches 41, 42. Then, the rotational speed of the drive shaft 37 (the feed amount of the feed portion 13) is changed (the support member is swingably supported around the support point, and the drive portion swings away from the support member away from the support point). A posture setting member that determines the posture of the support member is connected to the portion of the support member that is opposite to the swing fulcrum of the drive unit from the support point, and the posture of the support member is supported by the posture setting member. In a state that can be freely changed around the point This).

  In this case, as shown in FIG. 15, in the support member 47, the length M1 between the horizontal axis P1 and the center of the screw member 57 (corresponding to the length between the support point and the connection portion of the posture setting member). ) Is 1.0 to 2.0 times the length M2 between the horizontal axis P1 and the horizontal axis P2 (corresponding to the length between the support point and the swing fulcrum of the drive unit). The length is set in between.

  As shown in FIGS. 9, 12, and 15, the handle 54 includes a disk-like base portion 54 a connected to the front end portion of the operation shaft 50, and an arm portion 54 b extending outward in the radial direction from the base portion 54 a. , And a handle portion 54c rotatably supported around the horizontal axis P4 of the arm portion 54b.

As shown in FIGS. 9, 12, and 15, by having the handle 54 c of the handle 54, the operating shaft 50 can be quickly rotated to greatly change the rotational speed of the drive shaft 37 (the feeding amount of the feeding portion 13). can do. By having the base portion 54a of the handle 54, the operation shaft 50 can be easily rotated by a small amount, and fine adjustment of the rotation speed of the drive shaft 37 (the feed amount of the feed portion 13) can be easily performed.

[8]
Next, a state where the rotational speed of the drive shaft 37 (the feeding amount of the feeding unit 13) is changed by the structure described in [7] above will be described.
The state shown in FIGS. 15 and 16 is a state in which the rotational speed of the drive shaft 37 (the feed amount of the feed portion 13) is set to the high speed side (multiple side), and the horizontal axis P2 of the support member 47 is left on the page. Located closer to the transmission shaft 22 and the first and second one-way clutches 41 and 42.
In this case, the rotation angle A3 of the first one-way clutch 41 and the rotation angle A4 of the second one-way clutch 42 are increased by the following three elements [8] -1, 2, and 3, and the rotation speed of the drive shaft 37 is increased. (Feeding amount of the feeding unit 13) is on the high speed side (multiple side).

[8] -1
“As shown in FIG. 15 and FIG. 16, the drive unit 46 is inclined sideways with respect to the link member 49 (the straight line connecting the point where the link member 49 is connected to the drive unit 46 and the horizontal axis P2 and the link Therefore, the predetermined angle A2 of the drive unit 46 is larger than the predetermined angle A1 (constant value) of the swinging member 61. "

[8] -2
“As shown in FIGS. 15 and 16, the straight line connecting the point where the first linkage member 51 is connected to the drive unit 46 and the horizontal axis P2 and the first linkage member 51 are substantially orthogonal, and Since the arm 41a of the first one-way clutch 41 and the first linking member 51 are substantially orthogonal to each other, the rotation angle A3 of the first one-way clutch 41 is larger than the predetermined angle A2 of the drive unit 46. . "

[8] -3
“As shown in FIGS. 15 and 16, the straight line connecting the point where the second linkage member 52 is connected to the drive unit 46 and the horizontal axis P2 and the second linkage member 52 are substantially orthogonal, and Since the arm 42a of the second one-way clutch 42 and the second linking member 52 are substantially orthogonal to each other, the rotation angle A4 of the second one-way clutch 42 is larger than the predetermined angle A2 of the drive unit 46. . "

The state shown in FIGS. 17 and 18 is a state in which the rotational speed of the drive shaft 37 (the feed amount of the feed portion 13) is set to the low speed side (small side), and the horizontal axis P2 of the support member 47 is on the right side of the page. Located away from the transmission shaft 22 and the first and second one-way clutches 41 and 42.
In this case, the rotation angle A3 of the first one-way clutch 41 and the rotation angle A4 of the second one-way clutch 42 are reduced by the following three elements [8] -4, 5, 5 and 6, and the rotation speed of the drive shaft 37 is reduced. (Feeding amount of the feeding portion 13) is on the low speed side (small side).

[8] -4
“As shown in FIGS. 17 and 18, the drive unit 46 stands upright with respect to the linkage member 49 (a straight line connecting the point where the linkage member 49 is connected to the drive unit 46 and the horizontal axis P <b> 2, and the linkage member 49. Therefore, the predetermined angle A2 of the drive unit 46 is smaller than the predetermined angle A1 (constant value) of the swinging member 61. "

[8] -5
“As shown in FIGS. 17 and 18, the angle between the straight line connecting the point where the first linkage member 51 is connected to the drive unit 46 and the horizontal axis P2 and the first linkage member 51 is more than a right angle. Since the angle between the arm 41a of the first one-way clutch 41 and the first linkage member 51 is larger than a right angle, the first one-way clutch is larger than the predetermined angle A2 of the drive unit 46. The rotation angle A3 of 41 is small. "

[8] -6
“As shown in FIGS. 17 and 18, the angle between the straight line connecting the point where the second linkage member 52 is connected to the drive unit 46 and the horizontal axis P2 and the second linkage member 52 is a right angle. Therefore, the rotation angle A4 of the second one-way clutch 42 is smaller than the predetermined angle A2 of the drive unit 46. "

[9]
Next, the rotational speed of the drive shaft 37 (the feed amount of the feed portion 13) is set to a high speed state (a large amount), or the rotation speed of the drive shaft 37 (the feed amount of the feed portion 13) is set to the overall speed. Next, a state where a low speed state (a small state) is set will be described.

As shown in FIG. 21, a first scale portion 58a is provided on one side of the guide hole 58c of the scale plate 58, and a second scale portion 58b is provided on the other side of the guide hole 58c of the scale plate 58. ing.
As a result, as described in the preceding items [7] and [8], the index portion 47c of the support member 47 is changed to the guide hole of the scale plate 58 by changing the rotational speed of the drive shaft 37 (the feed amount of the feed portion 13). It moves along 58c (guide hole 40f of the cover member 40) (corresponding to a state in which a display unit is provided along the direction of changing the posture of the support member).

  In the state described in [7] and [8], the first and second linkage members 51 and 52 are connected across the drive unit 46 and the arms 41a and 42a of the first and second one-way clutches 41 and 42. The first state corresponds to the first scale portion 58a of the scale plate 58. Thereby, the feeding amount of the feeding portion 13 can be read by comparing the index portion 47 c of the support member 47 with the first scale portion 58 a of the scale plate 58.

  As shown in FIGS. 19 and 20, the second linkage member 52 is configured to be detachable from the drive unit 46. As a result, the second linkage member 52 is removed from the drive unit 46 while being connected to the arm 42a of the second one-way clutch 42, and the end of the second linkage member 52 is opened to the opening 48a of the bracket 48 (FIGS. 13 and 15). And the second one-way clutch 42 is fixed through the second linkage member 52. In this case, you may comprise so that the 2nd linkage member 52 may be connected and fixed to the right wall part 40a of the cover 40. FIG.

19 and 20, since the first one-way clutch 41 is used and the second one-way clutch 42 is not used, the first and second one-way clutches 41 and 42 are used (previous item [ 7] and [8], the rotational speed of the drive shaft 37 (the feeding amount of the feeding unit 13) is ½.
This state is a state in which the connection of the first linkage member 51 between the drive unit 46 and the first one-way clutch 41 is maintained, and the connection between the drive unit 46 and the arm 42a of the second one-way clutch 42 by the second linkage member 52. Is the second state in which is released, and corresponds to the second scale portion 58b of the scale plate 58 shown in FIG. Thereby, the feeding amount of the feeding portion 13 can be read by collating the indicator portion 47 c of the support member 47 with the second scale portion 58 b of the scale plate 58.

As described above, by connecting and releasing the second linkage member 52 to and from the drive unit 46 (by setting the first and second states), the rotational speed of the drive shaft 37 (the feed amount of the feed unit 13) is increased. The overall speed can be changed in a high speed state (a large state), or the rotational speed of the drive shaft 37 (the feed amount of the feed portion 13) can be changed in a low speed state (a small state). .

  As shown in FIGS. 8, 10, 12, and 15, a downward bent portion 58 d is formed on the right and left sides of the scale plate 58, and a long hole 58 e is opened in the bent portion 58 d, and the scale plate 58 is bent. The portion 58d (the long hole 58e) is connected to the right and left wall portions 40a and 40b of the cover member 40 by a bolt 59. Accordingly, the position of the scale plate 58 (first and second scale portions 58a, 58b) shown in FIG. 21 is changed along the long hole 58e of the scale plate 58 (the direction of posture change of the support member 47 (index portion 47c)). (The vertical direction in FIG. 21)).

  With the above structure, for example, even if an assembly error occurs in each part and the positional relationship between the support member 47 (index part 47c) and the scale plate 58 (first and second scale parts 58a, 58b) is slightly shifted, the scale plate 58 By changing the position of the (first and second scale portions 58a, 58b) along the direction of the posture change of the support member 47 (index portion 47c), the support member 47 (index portion 47c) and the scale plate 58 ( The positional relationship with the first and second scale portions 58a and 58b) can be corrected.

[Another Embodiment of the Invention]
As shown in FIGS. 22 and 23, the drive unit 46 includes a boss portion 46e between the horizontal axis P2 and the boss portion 46a, and connects the linkage member 49 to the boss portion 46a of the drive unit 46 (see FIG. 22). 22) and a state of being connected to the boss portion 46e of the drive unit 46 (see FIG. 23). In this case, the drive unit 46 may be configured to include one or two boss portions (not shown) in addition to the boss portion 46e (the connection portion between the drive unit and the linking member may be provided on the drive unit). Corresponds to a state in which it can be changed along the radial direction of reciprocating oscillation).

  Thus, as shown in FIG. 22, from the state of connecting the linking member 49 to the boss portion 46a of the drive unit 46 (the state described in the previous items [7] [8] [9]), as shown in FIG. By connecting the linking member 49 to the boss portion 46e of the drive unit 46, the rotational speed of the drive shaft 37 (the feed amount of the feed unit 13) can be further increased as a whole (a large state). (A state in which the predetermined angle A2 of the drive unit 46 increases).

  In this case, as shown in FIG. 22 and FIG. 23, dead points (horizontal axis cores) in a state where the linking member 49 is connected to the boss portion 46 a of the drive portion 46 and a state where the linkage member 49 is connected to the boss portion 46 e of the drive portion 46. (P2, the point where the second linkage member 52 is connected to the drive unit 46, and the point where the second linkage member 52 is connected to the arm 42a of the second one-way clutch 42) I have to.

The present invention can be applied not only to the one provided with the supply amount changing device at the right end of the fertilizer application, but also to the one provided with the supply amount changing device at the left end of the fertilizer application.
The present invention is not only a fertilizer for supplying granular fertilizer to the rice field, but also a fertilizer for supplying liquid fertilizer (corresponding to agricultural materials) to the rice field (corresponding to agricultural material supply devices), seed pods (corresponding to agricultural materials) It can also be applied to a direct seeding device (corresponding to an agricultural material supply device) that supplies a rice field to a rice field, and a drug application device (corresponding to an agricultural material supply device) that supplies granular or liquid medicine (corresponding to an agricultural material) to the rice field.

DESCRIPTION OF SYMBOLS 12 Storage part 13 Feeding part 17 Engine 20 Support frame 22 Transmission shaft 22a Transmission shaft input member 23 Drive member 37 Drive shaft 38 Strut 39 Reinforcement member 41 First one-way clutch 41a First one-way clutch arm 42 Second one-way clutch 42a First 2 One-way clutch arm 46 Drive unit 47 Support member 49 Linking member 50 Posture setting member 51 First linkage member 52 Second linkage member 58 Display unit 61 Oscillating members 61a and 62 Connection position changing means A1 Predetermined angle A3 First one-way clutch A4 Rotation angle in a predetermined direction A4 Rotation angle in a predetermined direction of the second one-wick clutch B1 Predetermined direction M1 Length between the support point and the connecting portion of the posture setting member M2 Between the support point and the swing fulcrum of the drive unit Length P1 Support point of support member P2 Swing fulcrum of drive unit Q The lower end of the swing range of the input member of the upper part Q2 transmission shaft of the swing range of the input member of the transmission shaft

Claims (9)

A transmission shaft that is driven to reciprocately rotate within a predetermined angle range by the power of the engine, a swinging member is connected to the transmission shaft, and a linkage member spans between the swinging supported drive unit and the swinging member. Connect
The drive unit is configured to be reciprocally oscillated and driven via the linkage member when the oscillating member is reciprocally oscillated and driven within the range of the predetermined angle by the transmission shaft.
A connection position changing means capable of changing the connection position of the swing member with respect to the transmission shaft along the rotation direction of the transmission shaft;
A storage unit for storing agricultural material; a supply unit for supplying agricultural material in the storage unit; and a drive shaft for driving the supply unit,
A first one-way clutch and a second one-way clutch are provided on the drive shaft, a first linkage member is connected across the drive unit and an arm of the first one-way clutch, and the drive unit and an arm of the second one-way clutch And connecting the second linkage member over
The first one-way clutch is rotationally driven in the predetermined direction and the second one-way clutch is rotationally driven in a direction opposite to the predetermined direction by the forward swing of the driving unit, and the first one-way clutch drives the driving The shaft is rotationally driven in the predetermined direction,
The first one-way clutch is rotationally driven in a direction opposite to the predetermined direction by the swinging of the drive section in the backward direction, and the second one-way clutch is rotationally driven in the predetermined direction, and the second one-way clutch drives the drive. A paddy field machine configured such that a shaft is rotationally driven in the predetermined direction. The feeding part is arranged in the left-right direction, and the driving part is provided at the right or left end of the feeding part,
The transmission shaft is arranged in the left-right direction across the portion on the left and right center side of the feeding portion and the right or left end portion on the drive portion side in the feeding portion,
The oscillating member and the coupling position changing means are provided at an end of the transmission shaft on the side of the driving unit, and the linkage member is connected across the driving unit and the oscillating member. The paddy field machine according to 1. An input member is connected to an end of the transmission shaft opposite to the drive unit,
A drive member that is driven to reciprocate up and down by the power of the engine is provided on the lower side of the feeding portion and connected to the input member,
The drive shaft is configured to be reciprocally driven by the drive member via the input member within a range of the predetermined angle,
The paddy field work machine according to claim 2, comprising the transmission shaft at a height between an upper end portion and a lower end portion of the swing range of the input member in a side view. The aircraft is equipped with up and down right and left support columns, and a support frame is connected to the upper part of the support columns and arranged in the left-right direction, and the extension unit is connected to the support frame in the left-right direction. Place
The paddy field work machine according to claim 2 or 3, wherein the transmission shaft is provided below the support frame in a side view, and the transmission shaft is provided along the support frame in a rear view.   The paddy field machine according to claim 4, wherein a reinforcing member is connected across the right and left struts. An input member is connected to a portion of the transmission shaft opposite to the drive unit, and the input member extends rearward from the transmission shaft,
A drive member that is driven to reciprocate up and down by the power of the engine is provided on the lower side of the feeding portion and connected to the input member,
The drive shaft is configured to be reciprocally driven by the drive member via the input member within a range of the predetermined angle,
The paddy field machine according to claim 5, wherein the reinforcing member is connected across front portions of the right and left struts. A support member for swingably supporting the drive unit, and changing the position of the swinging fulcrum of the drive unit in the support member by changing the attitude of the support member;
Changing the rotation angle of the first one-way clutch in the predetermined direction by the forward swing of the drive unit, changing the rotation angle of the second one-way clutch in the predetermined direction by the backward swing of the drive unit, and Configure to change the feed amount of the feed section,
A display unit is provided along the direction of the posture change of the support member, and the support member and the display unit are collated so that the feeding amount of the feeding unit can be read.
The paddy field work machine according to any one of claims 1 to 6, wherein the position of the display unit is configured to be freely changeable along the direction of posture change of the support member. The support member is supported so as to be swingable around a support point, and a swing fulcrum of the drive unit is provided in a portion of the support member that is separated from the support point,
A posture setting member for determining the posture of the support member is connected to the portion of the support member opposite to the swing fulcrum of the drive unit from the support point, and the posture of the support member is changed by the posture setting member. It is configured to be freely changeable around the support point,
The length between the support point and the connecting portion of the posture setting member is set between 1.0 and 2.0 times the length between the support point and the swing fulcrum of the drive unit. The paddy field machine according to claim 7. The paddy field work machine according to any one of claims 1 to 8, wherein a connecting portion between the driving unit and the linking member is configured to be changeable along a radial direction of reciprocal swing of the driving unit. .

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