JP7076345B2 - Granular material supply device - Google Patents

Description

The present invention relates to a powder or granular material supply device that is mounted on a work vehicle or the like and supplies powder or granular materials such as fertilizer, chemicals, and seed paddy to a field.

As disclosed in Patent Document 1, a passenger-type rice transplanter, which is an example of a work vehicle, is equipped with a fertilizer application device, which is an example of a powder or granular material supply device, and is equipped with a fertilizer application device while planting seedlings in a field. Some of them are configured to supply powdery fertilizer (corresponding to powdery granules) to the field.

The fertilizer application device of Patent Document 1 is provided with a storage unit for storing fertilizer and a feeding rotating body. As the feeding rotating body is rotationally driven by the drive shaft, the fertilizer in the storage portion enters the recess of the feeding rotating body and is sent downward by the recess of the feeding rotating body, so that the fertilizer is fed to the feeding rotating body. It comes out of the recess and is supplied to the field.
As described above, by rotationally driving the feeding rotating body provided with the concave portion on the outer peripheral portion, the fertilizer in the storage portion is fed out in predetermined amounts and supplied to the field.

In Patent Document 1, a plurality of feeding rotating bodies having a relatively small width are attached to the outer peripheral portion of the drive shaft in a state of being in contact with each other side by side in the axis direction. One feeding rotating body provided is obtained.

Japanese Patent Application Laid-Open No. 2003-310017 (see FIG. 7)

In powder or granular materials such as fertilizer, fine powder may separate from the powder or granular material, and when the fine powder enters the gap between the adjacent feeding rotating bodies, the feeding rotating body is slightly smaller than the drive shaft. It may be in a state of tilting.

When the drive shaft and the feed-rotating body are rotationally driven while the pay-out rotating body is tilted with respect to the drive shaft, wear may progress between the drive shaft and the pay-out rotating body and the case accommodating them. There is a possibility that the drive torque of the drive shaft and the feeding rotating body may increase.
An object of the present invention is to suppress the progress of wear and the increase of the drive torque of the drive shaft and the feeding rotating body in the powder or granular material supply device.

The powder / granule supply device of the present invention is a feeding rotating body in which a storage portion in which the powder / granules are stored and a plurality of recesses in which the powder / granules of the storage portion enter are provided on the outer peripheral portion along the circumferential direction. And, so that the drive shaft attached to the outer peripheral portion in a state where the plurality of the feeding rotating bodies are in contact with each other side by side in the axis direction and the adjacent feeding rotating bodies are not separated from each other in the axis direction. The connecting portion is provided with a connecting portion for connecting the adjacent feeding rotating bodies , and the connecting portion is adjacent to the engaged portion provided on one of the feeding rotating bodies in the adjacent feeding rotating body. In the feeding rotating body, the feeding rotating body has an engaging portion which is provided on the other feeding rotating body and engages with the engaged portion, and the feeding rotating body is rotationally driven as the drive shaft is rotationally driven. Driven by rotation, the powder or granules of the reservoir enter the recess and are sent out of the recess and supplied to the field.

According to the present invention, in a state where a plurality of feeding rotating bodies are attached to the outer peripheral portion of the drive shaft in a state where a plurality of feeding rotating bodies are in contact with each other side by side in the axis direction, adjacent feeding rotating bodies are in contact with each other in the axis direction. It is connected by a connecting portion so as not to be separated, and it is difficult for a gap to be formed between adjacent feeding rotating bodies.

As a result, it is possible to reduce the state in which the fine powder separated from the powder and granules enters between the adjacent feeding rotating bodies, and it is possible to suppress the state in which the feeding rotating body is tilted with respect to the drive shaft. This is possible, and it is possible to suppress the progress of wear due to the tilting of the feeding rotating body with respect to the drive shaft and the increase in the driving torque of the driving shaft and the feeding rotating body.

In the present invention, a wall portion formed along the circumferential direction and the radial direction is provided on one side of the concave portion in the feeding rotating body in the axial center direction, and the concave portion in the feeding rotating body is said. The other portion in the axial core direction is opened, and the connecting portion is a portion of the adjacent feeding rotating body on the open side of the recess in one feeding rotating body and the wall in the other feeding rotating body. It is preferable to connect the adjacent feeding rotating bodies in a state of being in contact with the portion on the portion side.

In the feeding rotating body in which a plurality of recesses are provided on the outer peripheral portion along the circumferential direction, from the aspect of manufacturing the feeding rotating body with synthetic resin or the like, the recesses in the feeding rotating body are located on one side in the axial core direction. , A wall portion formed along the circumferential direction and the radial direction is provided, and the other portion of the recess in the feeding rotating body in the axial core direction is often open.

In this case, in the adjacent feeding rotating body, the portion on the open side of the recess in one feeding rotating body and the portion on the wall side in the other feeding rotating body are brought into contact with each other so that the feeding rotating body is in contact with each other. The open side portion of the concave portion in the above can be closed by the wall portion of the adjacent feeding rotating body, and the concave portion in which the powder and granules are hard to spill can be obtained in the feeding rotating body.

In the above-described configuration, according to the present invention, the feeding rotary body adjacent to each other by the connecting portion in a state where the open side portion of the recess in one feeding rotating body and the wall portion side portion in the other feeding rotating body are in contact with each other. Is connected, it is possible to appropriately obtain a recess in which the powder or granular material does not easily spill in the feeding rotating body.

In the present invention, a wall portion formed along the circumferential direction and the radial direction is provided on one side of the concave portion in the feeding rotating body in the axial center direction, and the concave portion in the feeding rotating body is said to have the same. The other portion in the axial core direction is opened, and the connecting portion is formed in the adjacent feeding rotating body, the opening side portion of the concave portion in one feeding rotating body and the concave portion in the other feeding rotating body. It is preferable to connect the adjacent feeding rotating bodies in a state of being in contact with the portion on the open side of the above.

In the feeding rotating body in which a plurality of recesses are provided on the outer peripheral portion along the circumferential direction, from the aspect of manufacturing the feeding rotating body with synthetic resin or the like, the recesses in the feeding rotating body are located on one side in the axial core direction. , A wall portion formed along the circumferential direction and the radial direction is provided, and the other portion of the recess in the feeding rotating body in the axial core direction is often open.

In this case, in the adjacent feeding rotating body, the open side portion of the concave portion in one feeding rotating body and the open side portion of the concave portion in the other feeding rotating body are brought into contact with each other, thereby causing the feeding rotation. Since the portion of the body on the open side of the recess can be closed, it is possible to obtain a recess in which the powder and granules are less likely to spill in the feeding rotating body.

In the above configuration, according to the present invention, in a state where the open side portion of the concave portion in one feeding rotating body and the open side portion of the concave portion in the other feeding rotating body are in contact with each other, the feeding rotation adjacent to each other by the connecting portion. Since the bodies are connected, it is possible to appropriately obtain a recess in which the powder or granular material does not easily spill in the feeding rotating body.

In the present invention, an opening is opened in the feeding rotating body, and the driving shaft is inserted into the opening, whereby the feeding rotating body is attached to the outer peripheral portion of the driving shaft, and the connecting portion is formed with the connecting portion. The engaged portion is provided on the inner surface of the opening of one of the feeding rotating bodies, and the engaging portion is elastically attached to the edge of the opening of the other feeding rotating body. It is preferable to engage with the engaged portion by being displaceably provided and entering the opening of one of the feeding rotating bodies.

According to the present invention, the connecting portion has an engaged portion provided on one of the feeding rotating bodies adjacent to the feeding rotating body and an engaging portion provided on the other feeding rotating body.
When the engaging portion is engaged with the engaged portion and the adjacent feeding rotating bodies are connected by the connecting portion, the connecting portion (engaged portion and engaged portion) is driven with the inner surface of the opening of the feeding rotating body. Since it is arranged between the shaft and the outer peripheral portion, it is not exposed to the outside of the feeding rotating body.

As a result, even if the drive shaft and the feeding rotary body are rotationally driven and the powder or granular material is supplied to the field by the powder or granular material supply device, the powder or granular material does not adhere to the connecting portion and the powder or granular material is not attached to the connecting portion. The body does not adhere to the connecting part and develop into a blockage of powder or granular material.

In the present invention, in a state where the drive shaft is inserted into the opening of the adjacent feeding rotary body and the engaging portion is engaged with the engaged portion, the engaging portion is the opening. Even if the engaging portion tries to disengage from the engaged portion by being displaced toward the center in the radial direction, the engaging portion hits the outer peripheral portion of the drive shaft, so that the opening of the engaging portion is opened. It is preferable that the displacement toward the center in the radial direction is prevented.

As described above, when the connecting portion (engaged portion and engaged portion) is arranged between the inner surface of the opening of the feeding rotating body and the outer peripheral portion of the drive shaft, the engaging portion is placed on the outer peripheral portion of the drive shaft. It will be in a state of approaching the part.
According to the present invention, even if the engaging portion is displaced toward the center side in the radial direction of the opening and tries to be disengaged from the engaged portion, the engaging portion will hit the outer peripheral portion of the drive shaft, and the engaging portion will be formed. Since the displacement of the opening portion toward the center in the radial direction (state in which the opening portion is disengaged from the engaged portion) is prevented, a connecting portion (engaged portion and engaged portion) having high connection strength can be obtained.

In the present invention, convex portions along the axis direction are provided at a predetermined pitch along the circumferential direction on one of the inner surface of the opening of the feeding rotating body and the outer peripheral portion of the driving shaft, and the feeding is performed. On the inner surface of the opening of the rotating body and on the other side of the outer peripheral portion of the drive shaft, an entry portion along the axis direction is provided at the predetermined pitch along the circumferential direction, and the convex portion is provided with the entry portion. By entering the portion, the feeding rotating body rotates integrally with the drive shaft, and the engaging portion and the engaged portion are connected to the convex portion and the entry portion, and the adjacent convex portion and the entry portion. It is preferable that it is arranged between and.

When the drive shaft is inserted into the opening of the feed-out rotating body and the feed-out rotating body is attached to the drive shaft so that the feed-out rotating body rotates integrally with the drive shaft, the inner surface of the opening of the feed-out portion and the outer circumference of the drive shaft are attached. In many cases, one of the portions is provided with a convex portion along the axis direction, and the other is provided with an intrusion portion along the axis direction. It will be in a state of rotating together with.

In this case, not only one set of the convex portion and the intruding portion is provided, but a plurality of sets of the convex portion and the intruding portion are provided along the circumferential direction on the inner surface of the opening of the feeding portion and the outer peripheral portion of the drive shaft. Often provided at a predetermined pitch.

In the above configuration, according to the present invention, the convex portion is arranged in a state where the connecting portion (engaged portion and engaged portion) is arranged between the inner surface of the opening portion of the feeding rotating body and the outer peripheral portion of the drive shaft. And is arranged between the entry portion and the adjacent convex portion and entry portion, and the connecting portion (engaged portion and engaged portion) is arranged compactly, thereby simplifying the structure. It will be advantageous in terms of aspects.

It is a right side view of a passenger-type rice transplanter. It is a top view of a passenger-type rice transplanter. It is a rear view of a fertilizer application device. It is a schematic plan view which shows the drive structure of a fertilizer application device. It is the left side view of the vertical section of the extension part. It is a vertical sectional rear view of a feeding part. It is a side view of one and the other feeding rotating body, a spacer, and the cross-sectional view of a drive shaft. It is a vertical sectional rear view of one and the other feeding rotating body, spacer. It is a vertical sectional rear view in a phase different from FIG. 8 in one and the other feeding rotating body and a spacer. It is a vertical sectional rear view in the vicinity of the engaged portion and the engaging portion of one and the other feeding rotating body. FIG. 3 is a vertical sectional rear view of one and the other feeding rotating body in the first alternative embodiment of the invention. It is a side view of one of the feeding rotating bodies in the 1st alternative embodiment of the invention. It is a side view of the other feeding rotating body in the 1st alternative embodiment of the invention.

1 to 13 show a passenger-type rice transplanter, which is an example of a work vehicle equipped with a fertilizer application device 11, which is an example of a powder or granular material supply device.
Unless otherwise specified, the front-rear direction and the left-right direction in the embodiment of the present invention are described as follows. The traveling direction on the forward side during work running is "forward", and the traveling direction on the reverse side is "rear". The direction corresponding to the right side is "right" and the direction corresponding to the left side is "left" with respect to the forward posture in the front-back direction.

(Overall configuration of passenger rice transplanter)
As shown in FIGS. 1 and 2, a link mechanism 3 that can swing up and down is provided at the rear portion of the fuselage supported by the right and left front wheels 1 and the right and left rear wheels 2, and the link mechanism 3 is provided. A 6-plant type seedling planting device 5 is supported up and down freely, and a hydraulic cylinder 4 for raising and lowering the link mechanism 3 is provided to form a passenger-type rice transplanter. The fertilizer application device 11 is provided over the rear part of the machine body and the seedling planting device 5.

(Overall configuration of seedling planting equipment)
As shown in FIGS. 1 and 2, the seedling planting device 5 includes three transmission cases 6, a rotary case 7 rotatably supported on the right and left portions of the rear portion of the transmission case 6, and a rotary case 7. A planting arm 8, a float 9, a seedling stand 10 and the like supported at both ends are provided.

The power of the engine 17 is from the hydrostatic continuously variable transmission (not shown), the interstock speed changer (not shown), and the planted clutch (not shown) provided in the mission case 18 to the PTO shaft 19. It is transmitted to the seedling planting device 5 via the seedling planting device 5. As a result, the rotary case 7 is rotationally driven as the seedling pedestal 10 is driven back and forth laterally to the left and right, and the planting arms 8 alternately take out the seedlings from the lower part of the seedling pedestal 10 and put them in the field. Plant.

(Overall configuration of fertilizer application device)
As shown in FIGS. 1 and 2, the fertilizer application device 11 is provided with a hopper 12 (corresponding to a storage portion), a feeding portion 13, a blower 14, a groove grooving device 15, a hose 16, and the like.

As shown in FIGS. 1, 2, and 3, the right and left support members 30 are connected to the rear portions of the right and left fuselage frames 28, and the driver's seat 31 is supported by the support members 30. When viewed from the side, the L-shaped right and left columns 38 are connected to the rear part of the upper part of the support member 30 and extend upward, and the reinforcing member 39 is connected over the columns 38. The square pipe-shaped support frame 20 is connected to the upper part of the support column 38, and the support frame 20 is arranged in the left-right direction so as to be located behind the driver's seat 31.

The four feeding portions 13 are connected to the front portion of the support frame 20, and the four feeding portions 13 are arranged in the left-right direction along the support frame 20. A hopper 12 in which powdery fertilizer (corresponding to powdery particles) is stored is connected to the upper part of the feeding portion 13, and a blower 14 is supported on the left portion of the support frame 20. A grooving device 15 is connected to the float 9, six grooving devices 15 are provided, and six hoses 16 are connected to the feeding portion 13 and the grooving device 15.

(Structure of feeding part)
As shown in FIGS. 5 and 6, three types of feeding rotating bodies 21 and 22 and a spacer 23 are connected to each other and arranged as one unit inside the feeding portion 13. The drive shaft 24 is rotatably supported along the left-right direction, and the units of the feeding rotating bodies 21 and 22 and the spacer 23 are attached to the drive shaft 24.

As described later (configuration of the feeding rotating body), a plurality of recesses 40, 50 are formed in the outer peripheral portion of the feeding rotating body 21 and 22, so as to be in contact with the outer peripheral portion of the feeding rotating body 21 and 22. The brush 35 is attached to the feeding portion 13.

When the drive shaft 24 and the feeding rotating bodies 21 and 22 are rotationally driven in the counterclockwise direction of FIG. 5, the fertilizer of the hopper 12 at the upper part of the feeding portion 13 enters the recesses 40 and 50 of the feeding rotating bodies 21 and 22. The fertilizer in the recesses 40 and 50 of the feeding rotating bodies 21 and 22 is sent downward while being worn off by the brush 35.

In the lower part of the feeding part 13, fertilizer comes out from the recesses 40 and 50 of the feeding rotating bodies 21 and 22, and is supplied to the hose 16 from the lower part of the feeding part 13, and is described later (working state and discharging state of fertilizer application device). As described above, the fertilizer is supplied to the groover 15 through the hose 16 by the blower of the blower 14, and is supplied to the field through the groover 15.

As shown in FIGS. 2, 3 and 6, two units of the feeding rotating body 21 and 22 and the spacer 23 are attached to the drive shaft 24 in the feeding portion 13 of the right end portion and the left end portion among the four feeding portions 13. It is attached. In the two feeding portions 13 on the left and right center sides, one unit of the feeding rotating bodies 21 and 22 and the spacer 23 is attached to the drive shaft 24.

One unit of the feeding rotating bodies 21 and 22 and the spacer 23 corresponds to one groove making device 15, and the fertilizer fed from one unit of the feeding rotating bodies 21 and 22 and the spacer 23 is 1 in the field. It is supplied to the portion (grooving device 15) adjacent to the two planting strips (planting arm 8).

(Structure of one feeding rotating body)
As shown in FIGS. 6 to 9, the feeding rotating body 21 is integrally formed of a synthetic resin, and a plurality of recesses 40 and a wall portion 41 are formed in the outer peripheral portion, and an opening 42 is formed in the central portion. Has been done.

The recess 40 is provided on the outer peripheral portion of the feeding rotating body 21 along the circumferential direction. In the feeding rotating body 21, a wall portion 41 is formed along the circumferential direction and the radial direction on one side of the axial core direction (left-right direction of FIGS. 8 and 9) of the opening 42 in the recess 40. The other portion of the recess 40 in the axial direction of the opening 42 is open.

On the inner surface of the opening 42, four intrusion portions 43 along the axial center direction of the opening 42 are provided at a predetermined pitch along the circumferential direction. Two groove portions 44 along the axial core direction of the opening portion 42 are provided between adjacent entry portions 43 so as to face each other.

At the end of the groove 44 on the wall 41 side, a protruding engaged portion 45 (corresponding to a connecting portion) having the same lateral width as the circumferential width of the groove 44 is provided, and the engaged portion 45 is provided. However, it is in a state of being arranged between the adjacent entry portions 43.

As shown in FIG. 10, the engaged portion 45 is provided with a head portion 45a and a base portion 45b.
In a cross-sectional view, the width of the opening 42 in the base portion 45b of the engaged portion 45 in the axial center direction is narrower than that of the head portion 45a of the engaged portion 45, and the engaged portion 45 is slightly smaller. It is in a state where it can be elastically displaced.

As shown in FIGS. 6 to 9, two elastically displaceable engaging portions 46 face each other at the opposite edge of the wall portion 41 in the opening 42 of the feeding rotating body 21. It is provided between the adjacent insertion portions 43, and the engaged portion 45 and the engaging portion 46 are arranged in different phases.

(Structure of the other feeding rotating body)
As shown in FIGS. 6 to 9, the feeding rotating body 22 is integrally formed of a synthetic resin, and a plurality of recesses 50 and a wall portion 51 are formed on the outer peripheral portion, and an opening 52 is formed on the central portion. Has been done.

The recess 50 is provided on the outer peripheral portion of the feeding rotating body 22 along the circumferential direction. In the feeding rotating body 22, a wall portion 51 is formed along the circumferential direction and the radial direction on one side of the axial core direction (left-right direction of FIGS. 8 and 9) of the opening 52 in the recess 50. The other portion of the recess 50 in the axial direction of the opening 52 is open.

On the inner surface of the opening 52, four entry portions 53 along the axial center direction of the opening 52 are provided at a predetermined pitch along the circumferential direction. Two groove portions 54 along the axial core direction of the opening portion 52 are provided between adjacent entry portions 53 so as to face each other.

Two elastically displaceable engaging portions 55 (corresponding to connecting portions) are adjacent to each other so as to face each other at the opposite edge of the wall portion 51 in the opening 52 of the feeding rotating body 22. It is provided between 53, and the groove portion 54 and the engaging portion 55 are arranged in different phases.

(Construction of spacer)
As shown in FIGS. 6 to 9, the spacer 23 is integrally made of synthetic resin, and an opening 62 is formed in the central portion.

On the inner surface of the opening 62, four entry portions 63 along the axial center direction of the opening 62 are provided at a predetermined pitch along the circumferential direction.
On the inner surface of the opening 62, two engaged portions 64 are provided between adjacent intrusion portions 63 so as to face each other.

(Assembly of feeding rotating body and spacer unit)
As shown in FIGS. 6 to 10, the engaging portion 55 of the feeding rotating body 22 is inserted from the end portion of the opening portion 42 of the feeding rotating body 21 on the wall portion 41 side, and the feeding rotation is performed while being elastically displaced. It is engaged with the engaged portion 45 (head 45a) of the body 21.

As a result, in the adjacent feeding rotating bodies 21 and 22, the position of the entering portion 43 of the feeding rotating body 21 and the position of the entering portion 53 of the feeding rotating body 22 are in the same state.

The open side portion of the recess 50 in the feeding rotating body 22 and the wall portion 41 side portion of the feeding rotating body 21 are in contact with each other, and the open side portion of the recess 50 in the feeding rotating body 22 is the feeding rotating body 21. It is in a closed state by the wall portion 41 of the. The phase of the concave portion 40 of the feeding rotating body 21 and the phase of the concave portion 50 of the feeding rotating body 22 are displaced by the width 1/2 of the circumferential direction of the recesses 40 and 50.

In the above-mentioned state, the adjacent feeding rotating bodies 21 and 22 are fed so as not to be separated from the state where the adjacent feeding rotating bodies 21 and 22 are in contact with each other in the axis direction of the drive shaft 24 (openings 42 and 52). It is in a state of being connected by the engaged portion 45 and the engaging portion 55 of the rotating bodies 21 and 22.

The engaging portion 46 of the feeding rotating body 21 is inserted into the opening 62 of the spacer 23 and engaged with the engaged portion 64 of the spacer 23 while being elastically displaced.
As a result, in the adjacent feeding rotating body 21 and the spacer 23, the position of the entering portion 43 of the feeding rotating body 21 and the position of the entering portion 63 of the spacer 23 are in the same state.

The open side portion of the recess 40 in the feeding rotating body 21 and the spacer 23 are in contact with each other, and the opening side portion of the recess 40 in the feeding rotating body 21 is closed by the spacer 23.

In the above-mentioned state, the adjacent feeding rotating bodies 21 and the spacer 23 are kept so as not to separate from the state where the adjacent feeding rotating bodies 21 and the spacers 23 are in contact with each other in the axial direction of the drive shaft 24 (openings 42, 62). , The feeding rotating body 21 and the spacer 23 are connected by the engaged portion 64 and the engaging portion 46.
As described above, the units of the feeding rotating bodies 21 and 22 and the spacer 23 can be obtained (see the above-mentioned (configuration of the feeding portion)).

(Mounting of the feeding rotating body and spacer unit to the drive shaft)
As shown in FIGS. 5, 6 and 7, four convex portions 48 along the axis direction of the drive shaft 24 are provided on the outer peripheral portion of the drive shaft 24 at a predetermined pitch along the circumferential direction. .. The cross-sectional shape of the convex portion 48 of the drive shaft 24 is the same as the cross-sectional shape of the feeding rotary bodies 21 and 22 and the insertion portions 43, 53, 63 of the spacer 23.

In the unit of the feeding rotating body 21 and 22 and the spacer 23 obtained as described in the above (Assembly of the feeding rotating body and the spacer unit), the openings 42, 52 of the feeding rotating body 21 and 22 and the spacer 23, The drive shaft 24 is inserted into 62.

In this case, by inserting the convex portion 48 of the drive shaft 24 into the feeding portions 43, 53, 63 of the feeding rotating bodies 21 and 22 and the spacer 23, the feeding rotating bodies 21 and 22 and the spacer 23 become the drive shaft 24. It is in a state of being attached to the outer peripheral portion of the drive shaft 24 so as to rotate integrally.

As shown in FIG. 6, the feeding rotating body 22 is applied to the step portion 49 of the drive shaft 24, the stopper ring 56 is attached to the driving shaft 24, and the spacer 23 is stopped, whereby the feeding rotating body 21 and 22 and the spacer 23 are stopped. Unit is attached to the drive shaft 24.

By attaching the stopper ring 56 to the drive shaft 24 and stopping the feeding rotating body 22 and the spacer 23, the unit of the feeding rotating body 21 and 22 and the spacer 23 is attached to the drive shaft 24.

As a result, as shown in FIGS. 6, 7 and 10, the engaged portion 45 and the engaging portion 55 of the feeding rotating body 21 and 22 are arranged on the inner surface of the opening 42 of the feeding rotating body 21 and the drive shaft 24 The convex portion 48 and the entry portion 43 of the feeding rotating body 21 are arranged between the convex portion 48 of the adjacent drive shaft 24 and the entering portion 43 of the feeding rotating body 21.

The engaged portion 64 and the engaging portion 46 of the feeding rotating body 21 and the spacer 23 are arranged on the inner surface of the opening portion 62 of the spacer 23, and are adjacent to the convex portion 48 of the drive shaft 24 and the insertion portion 63 of the spacer 23. It is in a state of being arranged between the convex portion 48 of the drive shaft 24 and the entry portion 63 of the spacer 23.

In the above-mentioned state, as shown in FIGS. 6 and 10, the engaging portions 46 and 55 of the feeding rotating bodies 21 and 22 are in a state of approaching the outer peripheral portion of the drive shaft 24.
In this state, the engaging portion 55 of the feeding rotating body 22 is displaced toward the radial center side (lower side in FIG. 10) of the opening 42 of the feeding rotating body 21, and the engaged portion 45 of the feeding rotating body 21 is engaged. Even if it tries to disengage from, the engaging portion 55 of the feeding rotating body 22 will hit the outer peripheral portion of the drive shaft 24, and the engaging portion 55 of the feeding rotating body 22 will be displaced toward the center side in the radial direction. The state of being disengaged from the engaged portion 45 of the feeding rotating body 21) is prevented.

Even if the engaging portion 46 of the feeding rotating body 21 is displaced toward the radial center side of the opening 62 of the spacer 23 and tries to disengage from the engaged portion 64 of the spacer 23, the engaging portion 55 of the feeding rotating body 21 Will hit the outer peripheral portion of the drive shaft 24, and the displacement of the opening portion 62 of the engaging portion 46 of the feeding rotating body 21 toward the center in the radial direction (a state in which the spacer 23 is disengaged from the engaged portion 64) is prevented. The radius.

(Drive structure of fertilizer application device)
As shown in FIGS. 3 and 4, the bracket 60 is connected downward to a plurality of places of the support frame 20, and the transmission shaft 37 having a hexagonal cross section is rotatably supported by the bracket 60, and the transmission shaft 37 is supported. It is supported along the left-right direction of the lower side of the frame 20 and the rear part of the feeding portion 13.

The support bracket 32 is connected to the right side of the support frame 20, and the electric motor 33 and the reduction mechanism 34 are connected to the support bracket 32 and supported by the support frame 20.
The right portion of the transmission shaft 37 is connected to the deceleration mechanism 34, the power of the electric motor 33 is transmitted to the transmission shaft 37 via the deceleration mechanism 34, and the transmission shaft 37 is rotationally driven.

As shown in FIGS. 3, 4, and 6, the input gear 47 of the drive shaft 24 is arranged outside the left portion of the feeding portion 13. The output gear 37a is attached to the transmission shaft 37 so as to be relatively rotatable, and the output gear 37a meshes with the input gear 47 of the drive shaft 24.

The shift member 37b is integrally rotated and slidably attached to the transmission shaft 37. The shift member 37b is slidably supported at a transmission position that meshes with the output gear 37a and a cutoff position that is separated from the output gear 37a, and is provided with a spring 37c that urges the shift member 37b to the transmission position. The output gear 37a of the transmission shaft 37 and the shift member 37b constitute a minority clutch of the fertilizer application device 11.

With the above structure, the transmission shaft 37 is rotationally driven by the electric motor 33, the power of the transmission shaft 37 is transmitted from the output gear 37a of the transmission shaft 37 to the input gear 47 of the drive shaft 24, and the drive shaft 24 and the feeding rotation are rotated. The bodies 21 and 22 are rotationally driven, and fertilizer is fed out from the feeding portion 13.

By operating the shift member 37b of the transmission shaft 37 away from the output gear 37a (by operating the minority clutch in the disengaged state), the drive shaft 24 and the feeding rotating bodies 21 and 22 of the desired feeding portion 13 are stopped. be able to.

(Working state and discharging state of fertilizer application device)
As shown in FIGS. 2 and 4, the blower 14 is driven by the electric motor 25. A branch portion 26 is connected to the blower 14, and a shutter 26a for switching the blower of the blower 14 is provided in the branch portion 26.

As shown in FIGS. 4 and 5, the supply duct 27 is connected to the branch portion 26 and the front portion of the feeding portion 13, and the suction portion 13a of the feeding portion 13 is inserted into the supply duct 27.

As shown in FIGS. 3 and 4, a shutter 13c for opening and closing the discharge portion 13b and the discharge portion 13b is provided in the upper part of the rear portion of the feeding portion 13, and the discharge duct 29 extending from the branch portion 26 is provided. It is connected to the discharging portion 13b of the feeding portion 13.

The state shown in FIG. 4 is a state in which the inlet of the discharge duct 29 is blocked by the shutter 26a of the branch portion 26, and is a working state in which the air blown by the blower 14 is supplied to the supply duct 27 (shutter of the feeding portion 13). 13c is operated to the closed position).

In the working state, the blower 14 is supplied to the feeding section 13 through the supply duct 27, and when the fertilizer is fed from the hopper 12 by the feeding section 13 in predetermined amounts, the fertilizer is blown through the hose 16 by the blower 14. It is supplied to the grooving device 15 and is supplied to the field via the grooving device 15.

When the fertilizer remaining in the hopper 12 is collected after the planting work is completed, the inlet of the supply duct 27 is blocked by the shutter 26a of the branch portion 26 shown in FIG. 4, and the air blown from the blower 14 is supplied to the discharge duct 29. The state is set, and the shutter 13c of the feeding portion 13 is operated to the open position to set the discharging state.

As a result, the fertilizer of the hopper 12 is discharged from the discharge portion 13b of the feeding portion 13 to the discharge duct 29, the air of the blower 14 is supplied to the discharge duct 29, and the fertilizer discharged to the discharge duct 29 is sent to the discharge duct 29. It is discharged from the discharge port 29a of.

(First Different Form of Implementation of the Invention)
Instead of the feeding rotating bodies 21 and 22 shown in FIGS. 5 to 10, the feeding rotating bodies 21 and 22 may be configured as described below.

As shown in FIGS. 11 and 12, the feeding rotating body 21 is integrally formed of a synthetic resin, and similarly to the feeding rotating body 21 shown in FIGS. 5 to 10, the recess 40, the wall portion 41, and the opening A portion 42 and an entry portion 43 are provided. Four groove portions 44 along the axial core direction of the opening portion 42 are provided between adjacent entry portions 43 so as to face each other.

Of the four groove portions 44, a protruding engagement having the same width as the width of the groove portion 44 in the circumferential direction is engaged with the center portion of the opening portion 42 in the two groove portions 44 in the axial center direction (left-right direction in FIG. 11). A portion 45 (corresponding to a connecting portion) is provided, and the engaged portion 45 is arranged between adjacent entry portions 43. In the feeding rotating body 21, the engaging portion 46 shown in FIGS. 7, 8 and 9 is not provided.

As shown in FIGS. 11 and 13, the feeding rotating body 22 is integrally formed of a synthetic resin, and similarly to the feeding rotating body 22 shown in FIGS. 5 to 10, the recess 50, the wall portion 51, and the opening A portion 52, an entry portion 53, a groove portion 54, and an engaging portion 55 are provided.
In this case, the engaging portion 55 of the feeding rotating body 22 is configured to be longer than the engaging portion 55 shown in FIGS. 8, 9, and 10.

As shown in FIG. 11, the engaging portion 55 of the feeding rotating body 22 is inserted from the open end of the recess 40 in the opening 42 of the feeding rotating body 21 and inserted along the groove portion 44 of the feeding rotating body 21. Therefore, the engaging portion 55 of the feeding rotating body 22 is engaged with the engaged portion 45 of the feeding rotating body 21 while being elastically displaced. In this case, the spacer 23 shown in FIGS. 6 to 9 is not used.

As a result, in the adjacent feeding rotating bodies 21 and 22, the position of the entering portion 43 of the feeding rotating body 21 and the position of the entering portion 53 of the feeding rotating body 22 are in the same state.

With the phase of the recess 40 of the feeding rotating body 21 and the phase of the recess 50 of the feeding rotating body 22 slightly deviated from each other, the open side portion of the recess 40 in the feeding rotating body 21 and the recess 50 in the feeding rotating body 22. The open side portion of the feeding rotating body 21 and 22 is in contact with the open side portion, and the open side portion of the recesses 40 and 50 of the feeding rotating body 21 and 22 is closed.

In the above-mentioned state, the adjacent feeding rotating bodies 21 and 22 are fed so as not to be separated from the state where the adjacent feeding rotating bodies 21 and 22 are in contact with each other in the axis direction of the drive shaft 24 (openings 42 and 52). It is in a state of being connected by the engaged portion 45 and the engaging portion 55 of the rotating bodies 21 and 22.
As described above, the unit of the feeding rotating bodies 21 and 22 can be obtained.

(Second alternative form of carrying out the invention)
In the feeding rotating bodies 21 and 22, the engaged portion 45 may be provided on the feeding rotating body 22, and the engaging portion 55 may be provided on the feeding rotating body 21.

In the drive shaft 24 and the feeding rotary bodies 21 and 22, the convex portions 48 may be provided in the openings 42 and 52 of the feeding rotating bodies 21 and 22, and the intrusion portions 43 and 53 may be provided in the outer peripheral portion of the drive shaft 24. In this configuration, when the spacer 23 is used, the convex portion 48 may be provided in the opening 62 of the spacer 23.

(Third alternative form of carrying out the invention)
In the feeding rotating bodies 21 and 22, a pin-shaped convex portion (not shown) (corresponding to a connecting portion) is provided on the end face of one feeding rotating body 21 and 22, and on the end face of the other feeding rotating body 21 and 22. , A concave portion (corresponding to a connecting portion) having a diameter slightly smaller than that of the convex portion may be provided, and the convex portion may be press-fitted into the concave portion to connect the adjacent feeding rotating bodies 21 and 22.
The unit may be configured by connecting three or more feeding rotating bodies 21 and 22 instead of two feeding rotating bodies 21 and 22.

The present invention includes not only a fertilizer application device that supplies powdery and granular fertilizer to a field, but also a chemical spraying device (corresponding to a powdery and granular material supply device) that supplies a powdery and granular chemical (corresponding to a powder or granular material) to a field, and seed paddy. It can also be applied to a seeding device (corresponding to a powder / granular material supply device) that supplies (corresponding to a powder / granular material) to a field.

12 Hopper (reservoir)
21 Feeding rotating body 22 Feeding rotating body 24 Drive shaft 40 Recessed part 41 Wall part 42 Opening part 43 Entering part 45 Engagement part (connecting part)
48 Convex part 50 Concave part 51 Wall part 52 Opening part 53 Entering part 55 Engaging part (connecting part)

Claims (6)

A storage area where powder and granular materials are stored, and
A plurality of recesses into which the powder or granular material of the storage portion enters are a feeding rotating body provided on the outer peripheral portion along the circumferential direction.
A drive shaft to which a plurality of the feeding rotating bodies are attached to the outer peripheral portion in a state of being in contact with each other side by side in the axis direction,
A connecting portion for connecting the adjacent feeding rotating bodies is provided so that the adjacent feeding rotating bodies do not separate from the state of being in contact with each other in the axial center direction.
The connecting part is
In the adjacent feeding rotating body, the engaged portion provided on one of the feeding rotating bodies and the engaged portion
In the adjacent feeding rotating body, the feeding rotating body has an engaging portion provided on the other feeding rotating body and engaged with the engaged portion.
As the drive shaft is rotationally driven, the feed-out rotating body is rotationally driven, and the powder or granular material of the storage portion enters the recess and is sent out of the recess and supplied to the field. Powder and granular material supply device. A wall portion formed along the circumferential direction and the radial direction is provided on one side of the concave portion in the feeding rotating body in the axial core direction, and the concave portion in the feeding rotating body is provided with a wall portion in the axial core direction. The other part is open,
The connecting part is
In the adjacent feeding rotating body, the adjacent feeding rotating body is in contact with the open side portion of the recess in one feeding rotating body and the wall portion side portion in the other feeding rotating body. The powder or granular material supply device according to claim 1. A wall portion formed along the circumferential direction and the radial direction is provided on one side of the concave portion in the feeding rotating body in the axial core direction, and the concave portion in the feeding rotating body is provided with a wall portion in the axial core direction. The other part is open,
The connecting part is
In the adjacent feeding rotary body, the adjacent feeding rotation in a state where the open side portion of the concave portion in one of the feeding rotating bodies and the open side portion of the concave portion in the other feeding rotating body are in contact with each other. The powder or granular material supply device according to claim 1, wherein the bodies are connected. An opening is opened in the feeding rotating body, and the driving shaft is inserted into the opening, whereby the feeding rotating body is attached to the outer peripheral portion of the driving shaft.
The connecting part is
The engaged portion is provided on the inner surface of the opening of one of the feeding rotating bodies.
The engaging portion is elastically displaceably provided at the edge of the opening of the other feeding rotating body, and is inserted into the opening of one of the feeding rotating bodies to be covered. The powder or granular material supply device according to any one of claims 1 to 3, which engages with the engaging portion. In a state where the drive shaft is inserted into the opening of the adjacent feeding rotary body and the engaging portion is engaged with the engaged portion, the engaging portion is on the radial center side of the opening. Even if the engaging portion tries to disengage from the engaged portion by being displaced to, the engaging portion hits the outer peripheral portion of the drive shaft, so that the engaging portion is on the radial center side of the opening portion. The powder and granule supply device according to claim 4, wherein the displacement to the powder is prevented. Convex portions along the axis direction are provided at a predetermined pitch along the circumferential direction on one of the inner surface of the opening of the feeding rotating body and the outer peripheral portion of the drive shaft.
On the other side of the inner surface of the opening of the feeding rotating body and the outer peripheral portion of the driving shaft, intrusion portions along the axis direction are provided at the predetermined pitch along the circumferential direction.
When the convex portion enters the entry portion, the feeding rotating body rotates integrally with the drive shaft, and the feeding rotating body rotates integrally with the drive shaft.
The powder or granular material supply according to claim 4 or 5, wherein the engaging portion and the engaged portion are arranged between the convex portion and the entry portion and the adjacent convex portion and the entry portion. Device.

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